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Update zstd to 1.5.6.

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Bartosz Taudul 2024-05-31 17:13:52 +02:00
parent 4db02dd041
commit 982d6ddcdc
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GPG Key ID: B7FE2008B7575DF3
43 changed files with 4636 additions and 2342 deletions
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2
zstd/common/allocations.h
View File

@ -14,7 +14,7 @@
#define ZSTD_DEPS_NEED_MALLOC
#include "zstd_deps.h" /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */
#include "mem.h" /* MEM_STATIC */
#include "compiler.h" /* MEM_STATIC */
#define ZSTD_STATIC_LINKING_ONLY
#include "../zstd.h" /* ZSTD_customMem */

78
zstd/common/bitstream.h
View File

@ -90,19 +90,20 @@ MEM_STATIC size_t BIT_closeCStream(BIT_CStream_t* bitC);
/*-********************************************
* bitStream decoding API (read backward)
**********************************************/
typedef size_t BitContainerType;
typedef struct {
size_t bitContainer;
BitContainerType bitContainer;
unsigned bitsConsumed;
const char* ptr;
const char* start;
const char* limitPtr;
} BIT_DStream_t;
typedef enum { BIT_DStream_unfinished = 0,
BIT_DStream_endOfBuffer = 1,
BIT_DStream_completed = 2,
BIT_DStream_overflow = 3 } BIT_DStream_status; /* result of BIT_reloadDStream() */
/* 1,2,4,8 would be better for bitmap combinations, but slows down performance a bit ... :( */
typedef enum { BIT_DStream_unfinished = 0, /* fully refilled */
BIT_DStream_endOfBuffer = 1, /* still some bits left in bitstream */
BIT_DStream_completed = 2, /* bitstream entirely consumed, bit-exact */
BIT_DStream_overflow = 3 /* user requested more bits than present in bitstream */
} BIT_DStream_status; /* result of BIT_reloadDStream() */
MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize);
MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits);
@ -112,7 +113,7 @@ MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* bitD);
/* Start by invoking BIT_initDStream().
* A chunk of the bitStream is then stored into a local register.
* Local register size is 64-bits on 64-bits systems, 32-bits on 32-bits systems (size_t).
* Local register size is 64-bits on 64-bits systems, 32-bits on 32-bits systems (BitContainerType).
* You can then retrieve bitFields stored into the local register, **in reverse order**.
* Local register is explicitly reloaded from memory by the BIT_reloadDStream() method.
* A reload guarantee a minimum of ((8*sizeof(bitD->bitContainer))-7) bits when its result is BIT_DStream_unfinished.
@ -162,7 +163,7 @@ MEM_STATIC size_t BIT_initCStream(BIT_CStream_t* bitC,
return 0;
}
MEM_STATIC FORCE_INLINE_ATTR size_t BIT_getLowerBits(size_t bitContainer, U32 const nbBits)
FORCE_INLINE_TEMPLATE size_t BIT_getLowerBits(size_t bitContainer, U32 const nbBits)
{
#if defined(STATIC_BMI2) && STATIC_BMI2 == 1 && !defined(ZSTD_NO_INTRINSICS)
return _bzhi_u64(bitContainer, nbBits);
@ -267,22 +268,22 @@ MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, si
bitD->bitContainer = *(const BYTE*)(bitD->start);
switch(srcSize)
{
case 7: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[6]) << (sizeof(bitD->bitContainer)*8 - 16);
case 7: bitD->bitContainer += (BitContainerType)(((const BYTE*)(srcBuffer))[6]) << (sizeof(bitD->bitContainer)*8 - 16);
ZSTD_FALLTHROUGH;
case 6: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[5]) << (sizeof(bitD->bitContainer)*8 - 24);
case 6: bitD->bitContainer += (BitContainerType)(((const BYTE*)(srcBuffer))[5]) << (sizeof(bitD->bitContainer)*8 - 24);
ZSTD_FALLTHROUGH;
case 5: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[4]) << (sizeof(bitD->bitContainer)*8 - 32);
case 5: bitD->bitContainer += (BitContainerType)(((const BYTE*)(srcBuffer))[4]) << (sizeof(bitD->bitContainer)*8 - 32);
ZSTD_FALLTHROUGH;
case 4: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[3]) << 24;
case 4: bitD->bitContainer += (BitContainerType)(((const BYTE*)(srcBuffer))[3]) << 24;
ZSTD_FALLTHROUGH;
case 3: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[2]) << 16;
case 3: bitD->bitContainer += (BitContainerType)(((const BYTE*)(srcBuffer))[2]) << 16;
ZSTD_FALLTHROUGH;
case 2: bitD->bitContainer += (size_t)(((const BYTE*)(srcBuffer))[1]) << 8;
case 2: bitD->bitContainer += (BitContainerType)(((const BYTE*)(srcBuffer))[1]) << 8;
ZSTD_FALLTHROUGH;
default: break;
@ -297,12 +298,12 @@ MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, si
return srcSize;
}
MEM_STATIC FORCE_INLINE_ATTR size_t BIT_getUpperBits(size_t bitContainer, U32 const start)
FORCE_INLINE_TEMPLATE size_t BIT_getUpperBits(BitContainerType bitContainer, U32 const start)
{
return bitContainer >> start;
}
MEM_STATIC FORCE_INLINE_ATTR size_t BIT_getMiddleBits(size_t bitContainer, U32 const start, U32 const nbBits)
FORCE_INLINE_TEMPLATE size_t BIT_getMiddleBits(BitContainerType bitContainer, U32 const start, U32 const nbBits)
{
U32 const regMask = sizeof(bitContainer)*8 - 1;
/* if start > regMask, bitstream is corrupted, and result is undefined */
@ -325,7 +326,7 @@ MEM_STATIC FORCE_INLINE_ATTR size_t BIT_getMiddleBits(size_t bitContainer, U32 c
* On 32-bits, maxNbBits==24.
* On 64-bits, maxNbBits==56.
* @return : value extracted */
MEM_STATIC FORCE_INLINE_ATTR size_t BIT_lookBits(const BIT_DStream_t* bitD, U32 nbBits)
FORCE_INLINE_TEMPLATE size_t BIT_lookBits(const BIT_DStream_t* bitD, U32 nbBits)
{
/* arbitrate between double-shift and shift+mask */
#if 1
@ -348,7 +349,7 @@ MEM_STATIC size_t BIT_lookBitsFast(const BIT_DStream_t* bitD, U32 nbBits)
return (bitD->bitContainer << (bitD->bitsConsumed & regMask)) >> (((regMask+1)-nbBits) & regMask);
}
MEM_STATIC FORCE_INLINE_ATTR void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits)
FORCE_INLINE_TEMPLATE void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits)
{
bitD->bitsConsumed += nbBits;
}
@ -357,7 +358,7 @@ MEM_STATIC FORCE_INLINE_ATTR void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits)
* Read (consume) next n bits from local register and update.
* Pay attention to not read more than nbBits contained into local register.
* @return : extracted value. */
MEM_STATIC FORCE_INLINE_ATTR size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits)
FORCE_INLINE_TEMPLATE size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits)
{
size_t const value = BIT_lookBits(bitD, nbBits);
BIT_skipBits(bitD, nbBits);
@ -374,6 +375,21 @@ MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, unsigned nbBits)
return value;
}
/*! BIT_reloadDStream_internal() :
* Simple variant of BIT_reloadDStream(), with two conditions:
* 1. bitstream is valid : bitsConsumed <= sizeof(bitD->bitContainer)*8
* 2. look window is valid after shifted down : bitD->ptr >= bitD->start
*/
MEM_STATIC BIT_DStream_status BIT_reloadDStream_internal(BIT_DStream_t* bitD)
{
assert(bitD->bitsConsumed <= sizeof(bitD->bitContainer)*8);
bitD->ptr -= bitD->bitsConsumed >> 3;
assert(bitD->ptr >= bitD->start);
bitD->bitsConsumed &= 7;
bitD->bitContainer = MEM_readLEST(bitD->ptr);
return BIT_DStream_unfinished;
}
/*! BIT_reloadDStreamFast() :
* Similar to BIT_reloadDStream(), but with two differences:
* 1. bitsConsumed <= sizeof(bitD->bitContainer)*8 must hold!
@ -384,31 +400,35 @@ MEM_STATIC BIT_DStream_status BIT_reloadDStreamFast(BIT_DStream_t* bitD)
{
if (UNLIKELY(bitD->ptr < bitD->limitPtr))
return BIT_DStream_overflow;
assert(bitD->bitsConsumed <= sizeof(bitD->bitContainer)*8);
bitD->ptr -= bitD->bitsConsumed >> 3;
bitD->bitsConsumed &= 7;
bitD->bitContainer = MEM_readLEST(bitD->ptr);
return BIT_DStream_unfinished;
return BIT_reloadDStream_internal(bitD);
}
/*! BIT_reloadDStream() :
* Refill `bitD` from buffer previously set in BIT_initDStream() .
* This function is safe, it guarantees it will not read beyond src buffer.
* This function is safe, it guarantees it will not never beyond src buffer.
* @return : status of `BIT_DStream_t` internal register.
* when status == BIT_DStream_unfinished, internal register is filled with at least 25 or 57 bits */
MEM_STATIC FORCE_INLINE_ATTR BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD)
FORCE_INLINE_TEMPLATE BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD)
{
if (bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8)) /* overflow detected, like end of stream */
/* note : once in overflow mode, a bitstream remains in this mode until it's reset */
if (UNLIKELY(bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8))) {
static const BitContainerType zeroFilled = 0;
bitD->ptr = (const char*)&zeroFilled; /* aliasing is allowed for char */
/* overflow detected, erroneous scenario or end of stream: no update */
return BIT_DStream_overflow;
}
assert(bitD->ptr >= bitD->start);
if (bitD->ptr >= bitD->limitPtr) {
return BIT_reloadDStreamFast(bitD);
return BIT_reloadDStream_internal(bitD);
}
if (bitD->ptr == bitD->start) {
/* reached end of bitStream => no update */
if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return BIT_DStream_endOfBuffer;
return BIT_DStream_completed;
}
/* start < ptr < limitPtr */
/* start < ptr < limitPtr => cautious update */
{ U32 nbBytes = bitD->bitsConsumed >> 3;
BIT_DStream_status result = BIT_DStream_unfinished;
if (bitD->ptr - nbBytes < bitD->start) {

124
zstd/common/compiler.h
View File

@ -11,6 +11,8 @@
#ifndef ZSTD_COMPILER_H
#define ZSTD_COMPILER_H
#include <stddef.h>
#include "portability_macros.h"
/*-*******************************************************
@ -51,12 +53,19 @@
# define WIN_CDECL
#endif
/* UNUSED_ATTR tells the compiler it is okay if the function is unused. */
#if defined(__GNUC__)
# define UNUSED_ATTR __attribute__((unused))
#else
# define UNUSED_ATTR
#endif
/**
* FORCE_INLINE_TEMPLATE is used to define C "templates", which take constant
* parameters. They must be inlined for the compiler to eliminate the constant
* branches.
*/
#define FORCE_INLINE_TEMPLATE static INLINE_KEYWORD FORCE_INLINE_ATTR
#define FORCE_INLINE_TEMPLATE static INLINE_KEYWORD FORCE_INLINE_ATTR UNUSED_ATTR
/**
* HINT_INLINE is used to help the compiler generate better code. It is *not*
* used for "templates", so it can be tweaked based on the compilers
@ -71,14 +80,28 @@
#if !defined(__clang__) && defined(__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 8 && __GNUC__ < 5
# define HINT_INLINE static INLINE_KEYWORD
#else
# define HINT_INLINE static INLINE_KEYWORD FORCE_INLINE_ATTR
# define HINT_INLINE FORCE_INLINE_TEMPLATE
#endif
/* UNUSED_ATTR tells the compiler it is okay if the function is unused. */
/* "soft" inline :
* The compiler is free to select if it's a good idea to inline or not.
* The main objective is to silence compiler warnings
* when a defined function in included but not used.
*
* Note : this macro is prefixed `MEM_` because it used to be provided by `mem.h` unit.
* Updating the prefix is probably preferable, but requires a fairly large codemod,
* since this name is used everywhere.
*/
#ifndef MEM_STATIC /* already defined in Linux Kernel mem.h */
#if defined(__GNUC__)
# define UNUSED_ATTR __attribute__((unused))
# define MEM_STATIC static __inline UNUSED_ATTR
#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
# define MEM_STATIC static inline
#elif defined(_MSC_VER)
# define MEM_STATIC static __inline
#else
# define UNUSED_ATTR
# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
#endif
#endif
/* force no inlining */
@ -109,10 +132,10 @@
/* prefetch
* can be disabled, by declaring NO_PREFETCH build macro */
#if defined(NO_PREFETCH)
# define PREFETCH_L1(ptr) (void)(ptr) /* disabled */
# define PREFETCH_L2(ptr) (void)(ptr) /* disabled */
# define PREFETCH_L1(ptr) do { (void)(ptr); } while (0) /* disabled */
# define PREFETCH_L2(ptr) do { (void)(ptr); } while (0) /* disabled */
#else
# if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */
# if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) && !defined(_M_ARM64EC) /* _mm_prefetch() is not defined outside of x86/x64 */
# include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */
# define PREFETCH_L1(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T0)
# define PREFETCH_L2(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T1)
@ -120,24 +143,25 @@
# define PREFETCH_L1(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 3 /* locality */)
# define PREFETCH_L2(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 2 /* locality */)
# elif defined(__aarch64__)
# define PREFETCH_L1(ptr) __asm__ __volatile__("prfm pldl1keep, %0" ::"Q"(*(ptr)))
# define PREFETCH_L2(ptr) __asm__ __volatile__("prfm pldl2keep, %0" ::"Q"(*(ptr)))
# define PREFETCH_L1(ptr) do { __asm__ __volatile__("prfm pldl1keep, %0" ::"Q"(*(ptr))); } while (0)
# define PREFETCH_L2(ptr) do { __asm__ __volatile__("prfm pldl2keep, %0" ::"Q"(*(ptr))); } while (0)
# else
# define PREFETCH_L1(ptr) (void)(ptr) /* disabled */
# define PREFETCH_L2(ptr) (void)(ptr) /* disabled */
# define PREFETCH_L1(ptr) do { (void)(ptr); } while (0) /* disabled */
# define PREFETCH_L2(ptr) do { (void)(ptr); } while (0) /* disabled */
# endif
#endif /* NO_PREFETCH */
#define CACHELINE_SIZE 64
#define PREFETCH_AREA(p, s) { \
#define PREFETCH_AREA(p, s) \
do { \
const char* const _ptr = (const char*)(p); \
size_t const _size = (size_t)(s); \
size_t _pos; \
for (_pos=0; _pos<_size; _pos+=CACHELINE_SIZE) { \
PREFETCH_L2(_ptr + _pos); \
} \
}
} while (0)
/* vectorization
* older GCC (pre gcc-4.3 picked as the cutoff) uses a different syntax,
@ -166,9 +190,9 @@
#endif
#if __has_builtin(__builtin_unreachable) || (defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)))
# define ZSTD_UNREACHABLE { assert(0), __builtin_unreachable(); }
# define ZSTD_UNREACHABLE do { assert(0), __builtin_unreachable(); } while (0)
#else
# define ZSTD_UNREACHABLE { assert(0); }
# define ZSTD_UNREACHABLE do { assert(0); } while (0)
#endif
/* disable warnings */
@ -281,6 +305,74 @@
* Sanitizer
*****************************************************************/
/**
* Zstd relies on pointer overflow in its decompressor.
* We add this attribute to functions that rely on pointer overflow.
*/
#ifndef ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
# if __has_attribute(no_sanitize)
# if !defined(__clang__) && defined(__GNUC__) && __GNUC__ < 8
/* gcc < 8 only has signed-integer-overlow which triggers on pointer overflow */
# define ZSTD_ALLOW_POINTER_OVERFLOW_ATTR __attribute__((no_sanitize("signed-integer-overflow")))
# else
/* older versions of clang [3.7, 5.0) will warn that pointer-overflow is ignored. */
# define ZSTD_ALLOW_POINTER_OVERFLOW_ATTR __attribute__((no_sanitize("pointer-overflow")))
# endif
# else
# define ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
# endif
#endif
/**
* Helper function to perform a wrapped pointer difference without trigging
* UBSAN.
*
* @returns lhs - rhs with wrapping
*/
MEM_STATIC
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
ptrdiff_t ZSTD_wrappedPtrDiff(unsigned char const* lhs, unsigned char const* rhs)
{
return lhs - rhs;
}
/**
* Helper function to perform a wrapped pointer add without triggering UBSAN.
*
* @return ptr + add with wrapping
*/
MEM_STATIC
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
unsigned char const* ZSTD_wrappedPtrAdd(unsigned char const* ptr, ptrdiff_t add)
{
return ptr + add;
}
/**
* Helper function to perform a wrapped pointer subtraction without triggering
* UBSAN.
*
* @return ptr - sub with wrapping
*/
MEM_STATIC
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
unsigned char const* ZSTD_wrappedPtrSub(unsigned char const* ptr, ptrdiff_t sub)
{
return ptr - sub;
}
/**
* Helper function to add to a pointer that works around C's undefined behavior
* of adding 0 to NULL.
*
* @returns `ptr + add` except it defines `NULL + 0 == NULL`.
*/
MEM_STATIC
unsigned char* ZSTD_maybeNullPtrAdd(unsigned char* ptr, ptrdiff_t add)
{
return add > 0 ? ptr + add : ptr;
}
/* Issue #3240 reports an ASAN failure on an llvm-mingw build. Out of an
* abundance of caution, disable our custom poisoning on mingw. */
#ifdef __MINGW32__

36
zstd/common/cpu.h
View File

@ -35,6 +35,7 @@ MEM_STATIC ZSTD_cpuid_t ZSTD_cpuid(void) {
U32 f7b = 0;
U32 f7c = 0;
#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86))
#if !defined(__clang__)
int reg[4];
__cpuid((int*)reg, 0);
{
@ -50,6 +51,41 @@ MEM_STATIC ZSTD_cpuid_t ZSTD_cpuid(void) {
f7c = (U32)reg[2];
}
}
#else
/* Clang compiler has a bug (fixed in https://reviews.llvm.org/D101338) in
* which the `__cpuid` intrinsic does not save and restore `rbx` as it needs
* to due to being a reserved register. So in that case, do the `cpuid`
* ourselves. Clang supports inline assembly anyway.
*/
U32 n;
__asm__(
"pushq %%rbx\n\t"
"cpuid\n\t"
"popq %%rbx\n\t"
: "=a"(n)
: "a"(0)
: "rcx", "rdx");
if (n >= 1) {
U32 f1a;
__asm__(
"pushq %%rbx\n\t"
"cpuid\n\t"
"popq %%rbx\n\t"
: "=a"(f1a), "=c"(f1c), "=d"(f1d)
: "a"(1)
:);
}
if (n >= 7) {
__asm__(
"pushq %%rbx\n\t"
"cpuid\n\t"
"movq %%rbx, %%rax\n\t"
"popq %%rbx"
: "=a"(f7b), "=c"(f7c)
: "a"(7), "c"(0)
: "rdx");
}
#endif
#elif defined(__i386__) && defined(__PIC__) && !defined(__clang__) && defined(__GNUC__)
/* The following block like the normal cpuid branch below, but gcc
* reserves ebx for use of its pic register so we must specially

6
zstd/common/debug.c
View File

@ -21,4 +21,10 @@
#include "debug.h"
#if !defined(ZSTD_LINUX_KERNEL) || (DEBUGLEVEL>=2)
/* We only use this when DEBUGLEVEL>=2, but we get -Werror=pedantic errors if a
* translation unit is empty. So remove this from Linux kernel builds, but
* otherwise just leave it in.
*/
int g_debuglevel = DEBUGLEVEL;
#endif

23
zstd/common/debug.h
View File

@ -85,18 +85,27 @@ extern int g_debuglevel; /* the variable is only declared,
It's useful when enabling very verbose levels
on selective conditions (such as position in src) */
# define RAWLOG(l, ...) { \
# define RAWLOG(l, ...) \
do { \
if (l<=g_debuglevel) { \
ZSTD_DEBUG_PRINT(__VA_ARGS__); \
} }
# define DEBUGLOG(l, ...) { \
} \
} while (0)
#define STRINGIFY(x) #x
#define TOSTRING(x) STRINGIFY(x)
#define LINE_AS_STRING TOSTRING(__LINE__)
# define DEBUGLOG(l, ...) \
do { \
if (l<=g_debuglevel) { \
ZSTD_DEBUG_PRINT(__FILE__ ": " __VA_ARGS__); \
ZSTD_DEBUG_PRINT(__FILE__ ":" LINE_AS_STRING ": " __VA_ARGS__); \
ZSTD_DEBUG_PRINT(" \n"); \
} }
} \
} while (0)
#else
# define RAWLOG(l, ...) {} /* disabled */
# define DEBUGLOG(l, ...) {} /* disabled */
# define RAWLOG(l, ...) do { } while (0) /* disabled */
# define DEBUGLOG(l, ...) do { } while (0) /* disabled */
#endif

21
zstd/common/error_private.h
View File

@ -60,8 +60,13 @@ ERR_STATIC unsigned ERR_isError(size_t code) { return (code > ERROR(maxCode)); }
ERR_STATIC ERR_enum ERR_getErrorCode(size_t code) { if (!ERR_isError(code)) return (ERR_enum)0; return (ERR_enum) (0-code); }
/* check and forward error code */
#define CHECK_V_F(e, f) size_t const e = f; if (ERR_isError(e)) return e
#define CHECK_F(f) { CHECK_V_F(_var_err__, f); }
#define CHECK_V_F(e, f) \
size_t const e = f; \
do { \
if (ERR_isError(e)) \
return e; \
} while (0)
#define CHECK_F(f) do { CHECK_V_F(_var_err__, f); } while (0)
/*-****************************************
@ -96,9 +101,11 @@ void _force_has_format_string(const char *format, ...) {
* we don't want to force runtime evaluation of its arguments.
*/
#define _FORCE_HAS_FORMAT_STRING(...) \
do { \
if (0) { \
_force_has_format_string(__VA_ARGS__); \
}
} \
} while (0)
#define ERR_QUOTE(str) #str
@ -110,6 +117,7 @@ void _force_has_format_string(const char *format, ...) {
* this can't just wrap RETURN_ERROR().
*/
#define RETURN_ERROR_IF(cond, err, ...) \
do { \
if (cond) { \
RAWLOG(3, "%s:%d: ERROR!: check %s failed, returning %s", \
__FILE__, __LINE__, ERR_QUOTE(cond), ERR_QUOTE(ERROR(err))); \
@ -117,7 +125,8 @@ void _force_has_format_string(const char *format, ...) {
RAWLOG(3, ": " __VA_ARGS__); \
RAWLOG(3, "\n"); \
return ERROR(err); \
}
} \
} while (0)
/**
* Unconditionally return the specified error.
@ -132,7 +141,7 @@ void _force_has_format_string(const char *format, ...) {
RAWLOG(3, ": " __VA_ARGS__); \
RAWLOG(3, "\n"); \
return ERROR(err); \
} while(0);
} while(0)
/**
* If the provided expression evaluates to an error code, returns that error code.
@ -150,7 +159,7 @@ void _force_has_format_string(const char *format, ...) {
RAWLOG(3, "\n"); \
return err_code; \
} \
} while(0);
} while(0)
#if defined (__cplusplus)
}

5
zstd/common/fse.h
View File

@ -229,6 +229,7 @@ If there is an error, the function will return an error code, which can be teste
#endif /* FSE_H */
#if defined(FSE_STATIC_LINKING_ONLY) && !defined(FSE_H_FSE_STATIC_LINKING_ONLY)
#define FSE_H_FSE_STATIC_LINKING_ONLY
@ -464,13 +465,13 @@ MEM_STATIC void FSE_encodeSymbol(BIT_CStream_t* bitC, FSE_CState_t* statePtr, un
FSE_symbolCompressionTransform const symbolTT = ((const FSE_symbolCompressionTransform*)(statePtr->symbolTT))[symbol];
const U16* const stateTable = (const U16*)(statePtr->stateTable);
U32 const nbBitsOut = (U32)((statePtr->value + symbolTT.deltaNbBits) >> 16);
BIT_addBits(bitC, statePtr->value, nbBitsOut);
BIT_addBits(bitC, (size_t)statePtr->value, nbBitsOut);
statePtr->value = stateTable[ (statePtr->value >> nbBitsOut) + symbolTT.deltaFindState];
}
MEM_STATIC void FSE_flushCState(BIT_CStream_t* bitC, const FSE_CState_t* statePtr)
{
BIT_addBits(bitC, statePtr->value, statePtr->stateLog);
BIT_addBits(bitC, (size_t)statePtr->value, statePtr->stateLog);
BIT_flushBits(bitC);
}

36
zstd/common/fse_decompress.c
View File

@ -22,8 +22,7 @@
#define FSE_STATIC_LINKING_ONLY
#include "fse.h"
#include "error_private.h"
#define ZSTD_DEPS_NEED_MALLOC
#include "zstd_deps.h"
#include "zstd_deps.h" /* ZSTD_memcpy */
#include "bits.h" /* ZSTD_highbit32 */
@ -84,7 +83,7 @@ static size_t FSE_buildDTable_internal(FSE_DTable* dt, const short* normalizedCo
symbolNext[s] = 1;
} else {
if (normalizedCounter[s] >= largeLimit) DTableH.fastMode=0;
symbolNext[s] = normalizedCounter[s];
symbolNext[s] = (U16)normalizedCounter[s];
} } }
ZSTD_memcpy(dt, &DTableH, sizeof(DTableH));
}
@ -99,8 +98,7 @@ static size_t FSE_buildDTable_internal(FSE_DTable* dt, const short* normalizedCo
* all symbols have counts <= 8. We ensure we have 8 bytes at the end of
* our buffer to handle the over-write.
*/
{
U64 const add = 0x0101010101010101ull;
{ U64 const add = 0x0101010101010101ull;
size_t pos = 0;
U64 sv = 0;
U32 s;
@ -111,9 +109,8 @@ static size_t FSE_buildDTable_internal(FSE_DTable* dt, const short* normalizedCo
for (i = 8; i < n; i += 8) {
MEM_write64(spread + pos + i, sv);
}
pos += n;
}
}
pos += (size_t)n;
} }
/* Now we spread those positions across the table.
* The benefit of doing it in two stages is that we avoid the
* variable size inner loop, which caused lots of branch misses.
@ -232,12 +229,12 @@ FORCE_INLINE_TEMPLATE size_t FSE_decompress_usingDTable_generic(
break;
} }
return op-ostart;
assert(op >= ostart);
return (size_t)(op-ostart);
}
typedef struct {
short ncount[FSE_MAX_SYMBOL_VALUE + 1];
FSE_DTable dtable[1]; /* Dynamically sized */
} FSE_DecompressWksp;
@ -252,13 +249,18 @@ FORCE_INLINE_TEMPLATE size_t FSE_decompress_wksp_body(
unsigned tableLog;
unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE;
FSE_DecompressWksp* const wksp = (FSE_DecompressWksp*)workSpace;
size_t const dtablePos = sizeof(FSE_DecompressWksp) / sizeof(FSE_DTable);
FSE_DTable* const dtable = (FSE_DTable*)workSpace + dtablePos;
DEBUG_STATIC_ASSERT((FSE_MAX_SYMBOL_VALUE + 1) % 2 == 0);
FSE_STATIC_ASSERT((FSE_MAX_SYMBOL_VALUE + 1) % 2 == 0);
if (wkspSize < sizeof(*wksp)) return ERROR(GENERIC);
/* correct offset to dtable depends on this property */
FSE_STATIC_ASSERT(sizeof(FSE_DecompressWksp) % sizeof(FSE_DTable) == 0);
/* normal FSE decoding mode */
{
size_t const NCountLength = FSE_readNCount_bmi2(wksp->ncount, &maxSymbolValue, &tableLog, istart, cSrcSize, bmi2);
{ size_t const NCountLength =
FSE_readNCount_bmi2(wksp->ncount, &maxSymbolValue, &tableLog, istart, cSrcSize, bmi2);
if (FSE_isError(NCountLength)) return NCountLength;
if (tableLog > maxLog) return ERROR(tableLog_tooLarge);
assert(NCountLength <= cSrcSize);
@ -271,16 +273,16 @@ FORCE_INLINE_TEMPLATE size_t FSE_decompress_wksp_body(
workSpace = (BYTE*)workSpace + sizeof(*wksp) + FSE_DTABLE_SIZE(tableLog);
wkspSize -= sizeof(*wksp) + FSE_DTABLE_SIZE(tableLog);
CHECK_F( FSE_buildDTable_internal(wksp->dtable, wksp->ncount, maxSymbolValue, tableLog, workSpace, wkspSize) );
CHECK_F( FSE_buildDTable_internal(dtable, wksp->ncount, maxSymbolValue, tableLog, workSpace, wkspSize) );
{
const void* ptr = wksp->dtable;
const void* ptr = dtable;
const FSE_DTableHeader* DTableH = (const FSE_DTableHeader*)ptr;
const U32 fastMode = DTableH->fastMode;
/* select fast mode (static) */
if (fastMode) return FSE_decompress_usingDTable_generic(dst, dstCapacity, ip, cSrcSize, wksp->dtable, 1);
return FSE_decompress_usingDTable_generic(dst, dstCapacity, ip, cSrcSize, wksp->dtable, 0);
if (fastMode) return FSE_decompress_usingDTable_generic(dst, dstCapacity, ip, cSrcSize, dtable, 1);
return FSE_decompress_usingDTable_generic(dst, dstCapacity, ip, cSrcSize, dtable, 0);
}
}

15
zstd/common/huf.h
View File

@ -197,9 +197,22 @@ size_t HUF_readCTable (HUF_CElt* CTable, unsigned* maxSymbolValuePtr, const void
/** HUF_getNbBitsFromCTable() :
* Read nbBits from CTable symbolTable, for symbol `symbolValue` presumed <= HUF_SYMBOLVALUE_MAX
* Note 1 : is not inlined, as HUF_CElt definition is private */
* Note 1 : If symbolValue > HUF_readCTableHeader(symbolTable).maxSymbolValue, returns 0
* Note 2 : is not inlined, as HUF_CElt definition is private
*/
U32 HUF_getNbBitsFromCTable(const HUF_CElt* symbolTable, U32 symbolValue);
typedef struct {
BYTE tableLog;
BYTE maxSymbolValue;
BYTE unused[sizeof(size_t) - 2];
} HUF_CTableHeader;
/** HUF_readCTableHeader() :
* @returns The header from the CTable specifying the tableLog and the maxSymbolValue.
*/
HUF_CTableHeader HUF_readCTableHeader(HUF_CElt const* ctable);
/*
* HUF_decompress() does the following:
* 1. select the decompression algorithm (X1, X2) based on pre-computed heuristics

9
zstd/common/mem.h
View File

@ -31,15 +31,6 @@ extern "C" {
# include <stdlib.h> /* _byteswap_ulong */
# include <intrin.h> /* _byteswap_* */
#endif
#if defined(__GNUC__)
# define MEM_STATIC static __inline __attribute__((unused))
#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
# define MEM_STATIC static inline
#elif defined(_MSC_VER)
# define MEM_STATIC static __inline
#else
# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
#endif
/*-**************************************************************
* Basic Types

2
zstd/common/pool.c
View File

@ -223,7 +223,7 @@ static int POOL_resize_internal(POOL_ctx* ctx, size_t numThreads)
{ ZSTD_pthread_t* const threadPool = (ZSTD_pthread_t*)ZSTD_customCalloc(numThreads * sizeof(ZSTD_pthread_t), ctx->customMem);
if (!threadPool) return 1;
/* replace existing thread pool */
ZSTD_memcpy(threadPool, ctx->threads, ctx->threadCapacity * sizeof(*threadPool));
ZSTD_memcpy(threadPool, ctx->threads, ctx->threadCapacity * sizeof(ZSTD_pthread_t));
ZSTD_customFree(ctx->threads, ctx->customMem);
ctx->threads = threadPool;
/* Initialize additional threads */

2
zstd/common/pool.h
View File

@ -47,7 +47,7 @@ void POOL_joinJobs(POOL_ctx* ctx);
/*! POOL_resize() :
* Expands or shrinks pool's number of threads.
* This is more efficient than releasing + creating a new context,
* since it tries to preserve and re-use existing threads.
* since it tries to preserve and reuse existing threads.
* `numThreads` must be at least 1.
* @return : 0 when resize was successful,
* !0 (typically 1) if there is an error.

2
zstd/common/portability_macros.h
View File

@ -68,6 +68,8 @@
/* Mark the internal assembly functions as hidden */
#ifdef __ELF__
# define ZSTD_HIDE_ASM_FUNCTION(func) .hidden func
#elif defined(__APPLE__)
# define ZSTD_HIDE_ASM_FUNCTION(func) .private_extern func
#else
# define ZSTD_HIDE_ASM_FUNCTION(func)
#endif

10
zstd/common/threading.c
View File

@ -73,10 +73,12 @@ int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused,
ZSTD_thread_params_t thread_param;
(void)unused;
if (thread==NULL) return -1;
*thread = NULL;
thread_param.start_routine = start_routine;
thread_param.arg = arg;
thread_param.initialized = 0;
*thread = NULL;
/* Setup thread initialization synchronization */
if(ZSTD_pthread_cond_init(&thread_param.initialized_cond, NULL)) {
@ -91,7 +93,7 @@ int ZSTD_pthread_create(ZSTD_pthread_t* thread, const void* unused,
/* Spawn thread */
*thread = (HANDLE)_beginthreadex(NULL, 0, worker, &thread_param, 0, NULL);
if (!thread) {
if (*thread==NULL) {
ZSTD_pthread_mutex_destroy(&thread_param.initialized_mutex);
ZSTD_pthread_cond_destroy(&thread_param.initialized_cond);
return errno;
@ -137,6 +139,7 @@ int ZSTD_pthread_join(ZSTD_pthread_t thread)
int ZSTD_pthread_mutex_init(ZSTD_pthread_mutex_t* mutex, pthread_mutexattr_t const* attr)
{
assert(mutex != NULL);
*mutex = (pthread_mutex_t*)ZSTD_malloc(sizeof(pthread_mutex_t));
if (!*mutex)
return 1;
@ -145,6 +148,7 @@ int ZSTD_pthread_mutex_init(ZSTD_pthread_mutex_t* mutex, pthread_mutexattr_t con
int ZSTD_pthread_mutex_destroy(ZSTD_pthread_mutex_t* mutex)
{
assert(mutex != NULL);
if (!*mutex)
return 0;
{
@ -156,6 +160,7 @@ int ZSTD_pthread_mutex_destroy(ZSTD_pthread_mutex_t* mutex)
int ZSTD_pthread_cond_init(ZSTD_pthread_cond_t* cond, pthread_condattr_t const* attr)
{
assert(cond != NULL);
*cond = (pthread_cond_t*)ZSTD_malloc(sizeof(pthread_cond_t));
if (!*cond)
return 1;
@ -164,6 +169,7 @@ int ZSTD_pthread_cond_init(ZSTD_pthread_cond_t* cond, pthread_condattr_t const*
int ZSTD_pthread_cond_destroy(ZSTD_pthread_cond_t* cond)
{
assert(cond != NULL);
if (!*cond)
return 0;
{

10
zstd/common/xxhash.c
View File

@ -1,10 +1,6 @@
/*
* xxHash - Fast Hash algorithm
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* You can contact the author at :
* - xxHash homepage: https://cyan4973.github.io/xxHash/
* - xxHash source repository : https://github.com/Cyan4973/xxHash
* xxHash - Extremely Fast Hash algorithm
* Copyright (c) Yann Collet - Meta Platforms, Inc
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
@ -12,8 +8,6 @@
* You may select, at your option, one of the above-listed licenses.
*/
/*
* xxhash.c instantiates functions defined in xxhash.h
*/

3256
zstd/common/xxhash.h
View File

File diff suppressed because it is too large Load Diff

10
zstd/common/zstd_internal.h
View File

@ -178,7 +178,7 @@ static void ZSTD_copy8(void* dst, const void* src) {
ZSTD_memcpy(dst, src, 8);
#endif
}
#define COPY8(d,s) { ZSTD_copy8(d,s); d+=8; s+=8; }
#define COPY8(d,s) do { ZSTD_copy8(d,s); d+=8; s+=8; } while (0)
/* Need to use memmove here since the literal buffer can now be located within
the dst buffer. In circumstances where the op "catches up" to where the
@ -198,7 +198,7 @@ static void ZSTD_copy16(void* dst, const void* src) {
ZSTD_memcpy(dst, copy16_buf, 16);
#endif
}
#define COPY16(d,s) { ZSTD_copy16(d,s); d+=16; s+=16; }
#define COPY16(d,s) do { ZSTD_copy16(d,s); d+=16; s+=16; } while (0)
#define WILDCOPY_OVERLENGTH 32
#define WILDCOPY_VECLEN 16
@ -227,7 +227,7 @@ void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length, ZSTD_overlap_e
if (ovtype == ZSTD_overlap_src_before_dst && diff < WILDCOPY_VECLEN) {
/* Handle short offset copies. */
do {
COPY8(op, ip)
COPY8(op, ip);
} while (op < oend);
} else {
assert(diff >= WILDCOPY_VECLEN || diff <= -WILDCOPY_VECLEN);
@ -366,13 +366,13 @@ typedef struct {
/*! ZSTD_getcBlockSize() :
* Provides the size of compressed block from block header `src` */
/* Used by: decompress, fullbench (does not get its definition from here) */
/* Used by: decompress, fullbench */
size_t ZSTD_getcBlockSize(const void* src, size_t srcSize,
blockProperties_t* bpPtr);
/*! ZSTD_decodeSeqHeaders() :
* decode sequence header from src */
/* Used by: decompress, fullbench (does not get its definition from here) */
/* Used by: zstd_decompress_block, fullbench */
size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx* dctx, int* nbSeqPtr,
const void* src, size_t srcSize);

11
zstd/compress/fse_compress.c
View File

@ -25,7 +25,7 @@
#include "../common/error_private.h"
#define ZSTD_DEPS_NEED_MALLOC
#define ZSTD_DEPS_NEED_MATH64
#include "../common/zstd_deps.h" /* ZSTD_malloc, ZSTD_free, ZSTD_memcpy, ZSTD_memset */
#include "../common/zstd_deps.h" /* ZSTD_memset */
#include "../common/bits.h" /* ZSTD_highbit32 */
@ -255,7 +255,7 @@ FSE_writeNCount_generic (void* header, size_t headerBufferSize,
/* Init */
remaining = tableSize+1; /* +1 for extra accuracy */
threshold = tableSize;
nbBits = tableLog+1;
nbBits = (int)tableLog+1;
while ((symbol < alphabetSize) && (remaining>1)) { /* stops at 1 */
if (previousIs0) {
@ -274,7 +274,7 @@ FSE_writeNCount_generic (void* header, size_t headerBufferSize,
}
while (symbol >= start+3) {
start+=3;
bitStream += 3 << bitCount;
bitStream += 3U << bitCount;
bitCount += 2;
}
bitStream += (symbol-start) << bitCount;
@ -294,7 +294,7 @@ FSE_writeNCount_generic (void* header, size_t headerBufferSize,
count++; /* +1 for extra accuracy */
if (count>=threshold)
count += max; /* [0..max[ [max..threshold[ (...) [threshold+max 2*threshold[ */
bitStream += count << bitCount;
bitStream += (U32)count << bitCount;
bitCount += nbBits;
bitCount -= (count<max);
previousIs0 = (count==1);
@ -322,7 +322,8 @@ FSE_writeNCount_generic (void* header, size_t headerBufferSize,
out[1] = (BYTE)(bitStream>>8);
out+= (bitCount+7) /8;
return (out-ostart);
assert(out >= ostart);
return (size_t)(out-ostart);
}

59
zstd/compress/huf_compress.c
View File

@ -220,6 +220,25 @@ static void HUF_setValue(HUF_CElt* elt, size_t value)
}
}
HUF_CTableHeader HUF_readCTableHeader(HUF_CElt const* ctable)
{
HUF_CTableHeader header;
ZSTD_memcpy(&header, ctable, sizeof(header));
return header;
}
static void HUF_writeCTableHeader(HUF_CElt* ctable, U32 tableLog, U32 maxSymbolValue)
{
HUF_CTableHeader header;
HUF_STATIC_ASSERT(sizeof(ctable[0]) == sizeof(header));
ZSTD_memset(&header, 0, sizeof(header));
assert(tableLog < 256);
header.tableLog = (BYTE)tableLog;
assert(maxSymbolValue < 256);
header.maxSymbolValue = (BYTE)maxSymbolValue;
ZSTD_memcpy(ctable, &header, sizeof(header));
}
typedef struct {
HUF_CompressWeightsWksp wksp;
BYTE bitsToWeight[HUF_TABLELOG_MAX + 1]; /* precomputed conversion table */
@ -237,6 +256,9 @@ size_t HUF_writeCTable_wksp(void* dst, size_t maxDstSize,
HUF_STATIC_ASSERT(HUF_CTABLE_WORKSPACE_SIZE >= sizeof(HUF_WriteCTableWksp));
assert(HUF_readCTableHeader(CTable).maxSymbolValue == maxSymbolValue);
assert(HUF_readCTableHeader(CTable).tableLog == huffLog);
/* check conditions */
if (workspaceSize < sizeof(HUF_WriteCTableWksp)) return ERROR(GENERIC);
if (maxSymbolValue > HUF_SYMBOLVALUE_MAX) return ERROR(maxSymbolValue_tooLarge);
@ -283,7 +305,9 @@ size_t HUF_readCTable (HUF_CElt* CTable, unsigned* maxSymbolValuePtr, const void
if (tableLog > HUF_TABLELOG_MAX) return ERROR(tableLog_tooLarge);
if (nbSymbols > *maxSymbolValuePtr+1) return ERROR(maxSymbolValue_tooSmall);
CTable[0] = tableLog;
*maxSymbolValuePtr = nbSymbols - 1;
HUF_writeCTableHeader(CTable, tableLog, *maxSymbolValuePtr);
/* Prepare base value per rank */
{ U32 n, nextRankStart = 0;
@ -315,7 +339,6 @@ size_t HUF_readCTable (HUF_CElt* CTable, unsigned* maxSymbolValuePtr, const void
{ U32 n; for (n=0; n<nbSymbols; n++) HUF_setValue(ct + n, valPerRank[HUF_getNbBits(ct[n])]++); }
}
*maxSymbolValuePtr = nbSymbols - 1;
return readSize;
}
@ -323,6 +346,8 @@ U32 HUF_getNbBitsFromCTable(HUF_CElt const* CTable, U32 symbolValue)
{
const HUF_CElt* const ct = CTable + 1;
assert(symbolValue <= HUF_SYMBOLVALUE_MAX);
if (symbolValue > HUF_readCTableHeader(CTable).maxSymbolValue)
return 0;
return (U32)HUF_getNbBits(ct[symbolValue]);
}
@ -723,7 +748,8 @@ static void HUF_buildCTableFromTree(HUF_CElt* CTable, nodeElt const* huffNode, i
HUF_setNbBits(ct + huffNode[n].byte, huffNode[n].nbBits); /* push nbBits per symbol, symbol order */
for (n=0; n<alphabetSize; n++)
HUF_setValue(ct + n, valPerRank[HUF_getNbBits(ct[n])]++); /* assign value within rank, symbol order */
CTable[0] = maxNbBits;
HUF_writeCTableHeader(CTable, maxNbBits, maxSymbolValue);
}
size_t
@ -776,9 +802,16 @@ size_t HUF_estimateCompressedSize(const HUF_CElt* CTable, const unsigned* count,
}
int HUF_validateCTable(const HUF_CElt* CTable, const unsigned* count, unsigned maxSymbolValue) {
HUF_CTableHeader header = HUF_readCTableHeader(CTable);
HUF_CElt const* ct = CTable + 1;
int bad = 0;
int s;
assert(header.tableLog <= HUF_TABLELOG_ABSOLUTEMAX);
if (header.maxSymbolValue < maxSymbolValue)
return 0;
for (s = 0; s <= (int)maxSymbolValue; ++s) {
bad |= (count[s] != 0) & (HUF_getNbBits(ct[s]) == 0);
}
@ -1024,17 +1057,17 @@ HUF_compress1X_usingCTable_internal_body(void* dst, size_t dstSize,
const void* src, size_t srcSize,
const HUF_CElt* CTable)
{
U32 const tableLog = (U32)CTable[0];
U32 const tableLog = HUF_readCTableHeader(CTable).tableLog;
HUF_CElt const* ct = CTable + 1;
const BYTE* ip = (const BYTE*) src;
BYTE* const ostart = (BYTE*)dst;
BYTE* const oend = ostart + dstSize;
BYTE* op = ostart;
HUF_CStream_t bitC;
/* init */
if (dstSize < 8) return 0; /* not enough space to compress */
{ size_t const initErr = HUF_initCStream(&bitC, op, (size_t)(oend-op));
{ BYTE* op = ostart;
size_t const initErr = HUF_initCStream(&bitC, op, (size_t)(oend-op));
if (HUF_isError(initErr)) return 0; }
if (dstSize < HUF_tightCompressBound(srcSize, (size_t)tableLog) || tableLog > 11)
@ -1255,7 +1288,7 @@ unsigned HUF_optimalTableLog(
{ BYTE* dst = (BYTE*)workSpace + sizeof(HUF_WriteCTableWksp);
size_t dstSize = wkspSize - sizeof(HUF_WriteCTableWksp);
size_t maxBits, hSize, newSize;
size_t hSize, newSize;
const unsigned symbolCardinality = HUF_cardinality(count, maxSymbolValue);
const unsigned minTableLog = HUF_minTableLog(symbolCardinality);
size_t optSize = ((size_t) ~0) - 1;
@ -1266,12 +1299,14 @@ unsigned HUF_optimalTableLog(
/* Search until size increases */
for (optLogGuess = minTableLog; optLogGuess <= maxTableLog; optLogGuess++) {
DEBUGLOG(7, "checking for huffLog=%u", optLogGuess);
maxBits = HUF_buildCTable_wksp(table, count, maxSymbolValue, optLogGuess, workSpace, wkspSize);
{ size_t maxBits = HUF_buildCTable_wksp(table, count, maxSymbolValue, optLogGuess, workSpace, wkspSize);
if (ERR_isError(maxBits)) continue;
if (maxBits < optLogGuess && optLogGuess > minTableLog) break;
hSize = HUF_writeCTable_wksp(dst, dstSize, table, maxSymbolValue, (U32)maxBits, workSpace, wkspSize);
}
if (ERR_isError(hSize)) continue;
@ -1372,12 +1407,6 @@ HUF_compress_internal (void* dst, size_t dstSize,
huffLog = (U32)maxBits;
DEBUGLOG(6, "bit distribution completed (%zu symbols)", showCTableBits(table->CTable + 1, maxSymbolValue+1));
}
/* Zero unused symbols in CTable, so we can check it for validity */
{
size_t const ctableSize = HUF_CTABLE_SIZE_ST(maxSymbolValue);
size_t const unusedSize = sizeof(table->CTable) - ctableSize * sizeof(HUF_CElt);
ZSTD_memset(table->CTable + ctableSize, 0, unusedSize);
}
/* Write table description header */
{ CHECK_V_F(hSize, HUF_writeCTable_wksp(op, dstSize, table->CTable, maxSymbolValue, huffLog,
@ -1420,7 +1449,7 @@ size_t HUF_compress1X_repeat (void* dst, size_t dstSize,
/* HUF_compress4X_repeat():
* compress input using 4 streams.
* consider skipping quickly
* re-use an existing huffman compression table */
* reuse an existing huffman compression table */
size_t HUF_compress4X_repeat (void* dst, size_t dstSize,
const void* src, size_t srcSize,
unsigned maxSymbolValue, unsigned huffLog,

423
zstd/compress/zstd_compress.c
View File

@ -178,6 +178,7 @@ static void ZSTD_freeCCtxContent(ZSTD_CCtx* cctx)
size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx)
{
DEBUGLOG(3, "ZSTD_freeCCtx (address: %p)", (void*)cctx);
if (cctx==NULL) return 0; /* support free on NULL */
RETURN_ERROR_IF(cctx->staticSize, memory_allocation,
"not compatible with static CCtx");
@ -649,10 +650,11 @@ static size_t ZSTD_cParam_clampBounds(ZSTD_cParameter cParam, int* value)
return 0;
}
#define BOUNDCHECK(cParam, val) { \
#define BOUNDCHECK(cParam, val) \
do { \
RETURN_ERROR_IF(!ZSTD_cParam_withinBounds(cParam,val), \
parameter_outOfBound, "Param out of bounds"); \
}
} while (0)
static int ZSTD_isUpdateAuthorized(ZSTD_cParameter param)
@ -868,7 +870,7 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
#else
FORWARD_IF_ERROR(ZSTD_cParam_clampBounds(param, &value), "");
CCtxParams->nbWorkers = value;
return CCtxParams->nbWorkers;
return (size_t)(CCtxParams->nbWorkers);
#endif
case ZSTD_c_jobSize :
@ -892,7 +894,7 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
#else
FORWARD_IF_ERROR(ZSTD_cParam_clampBounds(ZSTD_c_overlapLog, &value), "");
CCtxParams->overlapLog = value;
return CCtxParams->overlapLog;
return (size_t)CCtxParams->overlapLog;
#endif
case ZSTD_c_rsyncable :
@ -902,7 +904,7 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
#else
FORWARD_IF_ERROR(ZSTD_cParam_clampBounds(ZSTD_c_overlapLog, &value), "");
CCtxParams->rsyncable = value;
return CCtxParams->rsyncable;
return (size_t)CCtxParams->rsyncable;
#endif
case ZSTD_c_enableDedicatedDictSearch :
@ -939,8 +941,10 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
return CCtxParams->ldmParams.hashRateLog;
case ZSTD_c_targetCBlockSize :
if (value!=0) /* 0 ==> default */
if (value!=0) { /* 0 ==> default */
value = MAX(value, ZSTD_TARGETCBLOCKSIZE_MIN);
BOUNDCHECK(ZSTD_c_targetCBlockSize, value);
}
CCtxParams->targetCBlockSize = (U32)value;
return CCtxParams->targetCBlockSize;
@ -968,7 +972,7 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_validateSequences:
BOUNDCHECK(ZSTD_c_validateSequences, value);
CCtxParams->validateSequences = value;
return CCtxParams->validateSequences;
return (size_t)CCtxParams->validateSequences;
case ZSTD_c_useBlockSplitter:
BOUNDCHECK(ZSTD_c_useBlockSplitter, value);
@ -983,7 +987,7 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_deterministicRefPrefix:
BOUNDCHECK(ZSTD_c_deterministicRefPrefix, value);
CCtxParams->deterministicRefPrefix = !!value;
return CCtxParams->deterministicRefPrefix;
return (size_t)CCtxParams->deterministicRefPrefix;
case ZSTD_c_prefetchCDictTables:
BOUNDCHECK(ZSTD_c_prefetchCDictTables, value);
@ -993,7 +997,7 @@ size_t ZSTD_CCtxParams_setParameter(ZSTD_CCtx_params* CCtxParams,
case ZSTD_c_enableSeqProducerFallback:
BOUNDCHECK(ZSTD_c_enableSeqProducerFallback, value);
CCtxParams->enableMatchFinderFallback = value;
return CCtxParams->enableMatchFinderFallback;
return (size_t)CCtxParams->enableMatchFinderFallback;
case ZSTD_c_maxBlockSize:
if (value!=0) /* 0 ==> default */
@ -1363,7 +1367,6 @@ size_t ZSTD_CCtx_reset(ZSTD_CCtx* cctx, ZSTD_ResetDirective reset)
RETURN_ERROR_IF(cctx->streamStage != zcss_init, stage_wrong,
"Reset parameters is only possible during init stage.");
ZSTD_clearAllDicts(cctx);
ZSTD_memset(&cctx->externalMatchCtx, 0, sizeof(cctx->externalMatchCtx));
return ZSTD_CCtxParams_reset(&cctx->requestedParams);
}
return 0;
@ -1391,11 +1394,12 @@ size_t ZSTD_checkCParams(ZSTD_compressionParameters cParams)
static ZSTD_compressionParameters
ZSTD_clampCParams(ZSTD_compressionParameters cParams)
{
# define CLAMP_TYPE(cParam, val, type) { \
# define CLAMP_TYPE(cParam, val, type) \
do { \
ZSTD_bounds const bounds = ZSTD_cParam_getBounds(cParam); \
if ((int)val<bounds.lowerBound) val=(type)bounds.lowerBound; \
else if ((int)val>bounds.upperBound) val=(type)bounds.upperBound; \
}
} while (0)
# define CLAMP(cParam, val) CLAMP_TYPE(cParam, val, unsigned)
CLAMP(ZSTD_c_windowLog, cParams.windowLog);
CLAMP(ZSTD_c_chainLog, cParams.chainLog);
@ -1467,6 +1471,48 @@ ZSTD_adjustCParams_internal(ZSTD_compressionParameters cPar,
const U64 maxWindowResize = 1ULL << (ZSTD_WINDOWLOG_MAX-1);
assert(ZSTD_checkCParams(cPar)==0);
/* Cascade the selected strategy down to the next-highest one built into
* this binary. */
#ifdef ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_btultra2) {
cPar.strategy = ZSTD_btultra;
}
if (cPar.strategy == ZSTD_btultra) {
cPar.strategy = ZSTD_btopt;
}
#endif
#ifdef ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_btopt) {
cPar.strategy = ZSTD_btlazy2;
}
#endif
#ifdef ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_btlazy2) {
cPar.strategy = ZSTD_lazy2;
}
#endif
#ifdef ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_lazy2) {
cPar.strategy = ZSTD_lazy;
}
#endif
#ifdef ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_lazy) {
cPar.strategy = ZSTD_greedy;
}
#endif
#ifdef ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_greedy) {
cPar.strategy = ZSTD_dfast;
}
#endif
#ifdef ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR
if (cPar.strategy == ZSTD_dfast) {
cPar.strategy = ZSTD_fast;
cPar.targetLength = 0;
}
#endif
switch (mode) {
case ZSTD_cpm_unknown:
case ZSTD_cpm_noAttachDict:
@ -1617,8 +1663,8 @@ ZSTD_sizeof_matchState(const ZSTD_compressionParameters* const cParams,
+ ZSTD_cwksp_aligned_alloc_size((MaxLL+1) * sizeof(U32))
+ ZSTD_cwksp_aligned_alloc_size((MaxOff+1) * sizeof(U32))
+ ZSTD_cwksp_aligned_alloc_size((1<<Litbits) * sizeof(U32))
+ ZSTD_cwksp_aligned_alloc_size((ZSTD_OPT_NUM+1) * sizeof(ZSTD_match_t))
+ ZSTD_cwksp_aligned_alloc_size((ZSTD_OPT_NUM+1) * sizeof(ZSTD_optimal_t));
+ ZSTD_cwksp_aligned_alloc_size(ZSTD_OPT_SIZE * sizeof(ZSTD_match_t))
+ ZSTD_cwksp_aligned_alloc_size(ZSTD_OPT_SIZE * sizeof(ZSTD_optimal_t));
size_t const lazyAdditionalSpace = ZSTD_rowMatchFinderUsed(cParams->strategy, useRowMatchFinder)
? ZSTD_cwksp_aligned_alloc_size(hSize)
: 0;
@ -1707,7 +1753,7 @@ size_t ZSTD_estimateCCtxSize_usingCCtxParams(const ZSTD_CCtx_params* params)
* be needed. However, we still allocate two 0-sized buffers, which can
* take space under ASAN. */
return ZSTD_estimateCCtxSize_usingCCtxParams_internal(
&cParams, &params->ldmParams, 1, useRowMatchFinder, 0, 0, ZSTD_CONTENTSIZE_UNKNOWN, params->useSequenceProducer, params->maxBlockSize);
&cParams, &params->ldmParams, 1, useRowMatchFinder, 0, 0, ZSTD_CONTENTSIZE_UNKNOWN, ZSTD_hasExtSeqProd(params), params->maxBlockSize);
}
size_t ZSTD_estimateCCtxSize_usingCParams(ZSTD_compressionParameters cParams)
@ -1768,7 +1814,7 @@ size_t ZSTD_estimateCStreamSize_usingCCtxParams(const ZSTD_CCtx_params* params)
return ZSTD_estimateCCtxSize_usingCCtxParams_internal(
&cParams, &params->ldmParams, 1, useRowMatchFinder, inBuffSize, outBuffSize,
ZSTD_CONTENTSIZE_UNKNOWN, params->useSequenceProducer, params->maxBlockSize);
ZSTD_CONTENTSIZE_UNKNOWN, ZSTD_hasExtSeqProd(params), params->maxBlockSize);
}
}
@ -2001,8 +2047,8 @@ ZSTD_reset_matchState(ZSTD_matchState_t* ms,
ms->opt.litLengthFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (MaxLL+1) * sizeof(unsigned));
ms->opt.matchLengthFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (MaxML+1) * sizeof(unsigned));
ms->opt.offCodeFreq = (unsigned*)ZSTD_cwksp_reserve_aligned(ws, (MaxOff+1) * sizeof(unsigned));
ms->opt.matchTable = (ZSTD_match_t*)ZSTD_cwksp_reserve_aligned(ws, (ZSTD_OPT_NUM+1) * sizeof(ZSTD_match_t));
ms->opt.priceTable = (ZSTD_optimal_t*)ZSTD_cwksp_reserve_aligned(ws, (ZSTD_OPT_NUM+1) * sizeof(ZSTD_optimal_t));
ms->opt.matchTable = (ZSTD_match_t*)ZSTD_cwksp_reserve_aligned(ws, ZSTD_OPT_SIZE * sizeof(ZSTD_match_t));
ms->opt.priceTable = (ZSTD_optimal_t*)ZSTD_cwksp_reserve_aligned(ws, ZSTD_OPT_SIZE * sizeof(ZSTD_optimal_t));
}
ms->cParams = *cParams;
@ -2074,7 +2120,7 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
{ size_t const windowSize = MAX(1, (size_t)MIN(((U64)1 << params->cParams.windowLog), pledgedSrcSize));
size_t const blockSize = MIN(params->maxBlockSize, windowSize);
size_t const maxNbSeq = ZSTD_maxNbSeq(blockSize, params->cParams.minMatch, params->useSequenceProducer);
size_t const maxNbSeq = ZSTD_maxNbSeq(blockSize, params->cParams.minMatch, ZSTD_hasExtSeqProd(params));
size_t const buffOutSize = (zbuff == ZSTDb_buffered && params->outBufferMode == ZSTD_bm_buffered)
? ZSTD_compressBound(blockSize) + 1
: 0;
@ -2091,8 +2137,7 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
size_t const neededSpace =
ZSTD_estimateCCtxSize_usingCCtxParams_internal(
&params->cParams, &params->ldmParams, zc->staticSize != 0, params->useRowMatchFinder,
buffInSize, buffOutSize, pledgedSrcSize, params->useSequenceProducer, params->maxBlockSize);
int resizeWorkspace;
buffInSize, buffOutSize, pledgedSrcSize, ZSTD_hasExtSeqProd(params), params->maxBlockSize);
FORWARD_IF_ERROR(neededSpace, "cctx size estimate failed!");
@ -2101,7 +2146,7 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
{ /* Check if workspace is large enough, alloc a new one if needed */
int const workspaceTooSmall = ZSTD_cwksp_sizeof(ws) < neededSpace;
int const workspaceWasteful = ZSTD_cwksp_check_wasteful(ws, neededSpace);
resizeWorkspace = workspaceTooSmall || workspaceWasteful;
int resizeWorkspace = workspaceTooSmall || workspaceWasteful;
DEBUGLOG(4, "Need %zu B workspace", neededSpace);
DEBUGLOG(4, "windowSize: %zu - blockSize: %zu", windowSize, blockSize);
@ -2176,10 +2221,10 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
}
/* reserve space for block-level external sequences */
if (params->useSequenceProducer) {
if (ZSTD_hasExtSeqProd(params)) {
size_t const maxNbExternalSeq = ZSTD_sequenceBound(blockSize);
zc->externalMatchCtx.seqBufferCapacity = maxNbExternalSeq;
zc->externalMatchCtx.seqBuffer =
zc->extSeqBufCapacity = maxNbExternalSeq;
zc->extSeqBuf =
(ZSTD_Sequence*)ZSTD_cwksp_reserve_aligned(ws, maxNbExternalSeq * sizeof(ZSTD_Sequence));
}
@ -2564,7 +2609,7 @@ ZSTD_reduceTable_internal (U32* const table, U32 const size, U32 const reducerVa
assert(size < (1U<<31)); /* can be casted to int */
#if ZSTD_MEMORY_SANITIZER && !defined (ZSTD_MSAN_DONT_POISON_WORKSPACE)
/* To validate that the table re-use logic is sound, and that we don't
/* To validate that the table reuse logic is sound, and that we don't
* access table space that we haven't cleaned, we re-"poison" the table
* space every time we mark it dirty.
*
@ -2992,40 +3037,43 @@ ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_paramS
static const ZSTD_blockCompressor blockCompressor[4][ZSTD_STRATEGY_MAX+1] = {
{ ZSTD_compressBlock_fast /* default for 0 */,
ZSTD_compressBlock_fast,
ZSTD_compressBlock_doubleFast,
ZSTD_compressBlock_greedy,
ZSTD_compressBlock_lazy,
ZSTD_compressBlock_lazy2,
ZSTD_compressBlock_btlazy2,
ZSTD_compressBlock_btopt,
ZSTD_compressBlock_btultra,
ZSTD_compressBlock_btultra2 },
ZSTD_COMPRESSBLOCK_DOUBLEFAST,
ZSTD_COMPRESSBLOCK_GREEDY,
ZSTD_COMPRESSBLOCK_LAZY,
ZSTD_COMPRESSBLOCK_LAZY2,
ZSTD_COMPRESSBLOCK_BTLAZY2,
ZSTD_COMPRESSBLOCK_BTOPT,
ZSTD_COMPRESSBLOCK_BTULTRA,
ZSTD_COMPRESSBLOCK_BTULTRA2
},
{ ZSTD_compressBlock_fast_extDict /* default for 0 */,
ZSTD_compressBlock_fast_extDict,
ZSTD_compressBlock_doubleFast_extDict,
ZSTD_compressBlock_greedy_extDict,
ZSTD_compressBlock_lazy_extDict,
ZSTD_compressBlock_lazy2_extDict,
ZSTD_compressBlock_btlazy2_extDict,
ZSTD_compressBlock_btopt_extDict,
ZSTD_compressBlock_btultra_extDict,
ZSTD_compressBlock_btultra_extDict },
ZSTD_COMPRESSBLOCK_DOUBLEFAST_EXTDICT,
ZSTD_COMPRESSBLOCK_GREEDY_EXTDICT,
ZSTD_COMPRESSBLOCK_LAZY_EXTDICT,
ZSTD_COMPRESSBLOCK_LAZY2_EXTDICT,
ZSTD_COMPRESSBLOCK_BTLAZY2_EXTDICT,
ZSTD_COMPRESSBLOCK_BTOPT_EXTDICT,
ZSTD_COMPRESSBLOCK_BTULTRA_EXTDICT,
ZSTD_COMPRESSBLOCK_BTULTRA_EXTDICT
},
{ ZSTD_compressBlock_fast_dictMatchState /* default for 0 */,
ZSTD_compressBlock_fast_dictMatchState,
ZSTD_compressBlock_doubleFast_dictMatchState,
ZSTD_compressBlock_greedy_dictMatchState,
ZSTD_compressBlock_lazy_dictMatchState,
ZSTD_compressBlock_lazy2_dictMatchState,
ZSTD_compressBlock_btlazy2_dictMatchState,
ZSTD_compressBlock_btopt_dictMatchState,
ZSTD_compressBlock_btultra_dictMatchState,
ZSTD_compressBlock_btultra_dictMatchState },
ZSTD_COMPRESSBLOCK_DOUBLEFAST_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_GREEDY_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_LAZY_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_LAZY2_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_BTLAZY2_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_BTOPT_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_BTULTRA_DICTMATCHSTATE,
ZSTD_COMPRESSBLOCK_BTULTRA_DICTMATCHSTATE
},
{ NULL /* default for 0 */,
NULL,
NULL,
ZSTD_compressBlock_greedy_dedicatedDictSearch,
ZSTD_compressBlock_lazy_dedicatedDictSearch,
ZSTD_compressBlock_lazy2_dedicatedDictSearch,
ZSTD_COMPRESSBLOCK_GREEDY_DEDICATEDDICTSEARCH,
ZSTD_COMPRESSBLOCK_LAZY_DEDICATEDDICTSEARCH,
ZSTD_COMPRESSBLOCK_LAZY2_DEDICATEDDICTSEARCH,
NULL,
NULL,
NULL,
@ -3038,18 +3086,26 @@ ZSTD_blockCompressor ZSTD_selectBlockCompressor(ZSTD_strategy strat, ZSTD_paramS
DEBUGLOG(4, "Selected block compressor: dictMode=%d strat=%d rowMatchfinder=%d", (int)dictMode, (int)strat, (int)useRowMatchFinder);
if (ZSTD_rowMatchFinderUsed(strat, useRowMatchFinder)) {
static const ZSTD_blockCompressor rowBasedBlockCompressors[4][3] = {
{ ZSTD_compressBlock_greedy_row,
ZSTD_compressBlock_lazy_row,
ZSTD_compressBlock_lazy2_row },
{ ZSTD_compressBlock_greedy_extDict_row,
ZSTD_compressBlock_lazy_extDict_row,
ZSTD_compressBlock_lazy2_extDict_row },
{ ZSTD_compressBlock_greedy_dictMatchState_row,
ZSTD_compressBlock_lazy_dictMatchState_row,
ZSTD_compressBlock_lazy2_dictMatchState_row },
{ ZSTD_compressBlock_greedy_dedicatedDictSearch_row,
ZSTD_compressBlock_lazy_dedicatedDictSearch_row,
ZSTD_compressBlock_lazy2_dedicatedDictSearch_row }
{
ZSTD_COMPRESSBLOCK_GREEDY_ROW,
ZSTD_COMPRESSBLOCK_LAZY_ROW,
ZSTD_COMPRESSBLOCK_LAZY2_ROW
},
{
ZSTD_COMPRESSBLOCK_GREEDY_EXTDICT_ROW,
ZSTD_COMPRESSBLOCK_LAZY_EXTDICT_ROW,
ZSTD_COMPRESSBLOCK_LAZY2_EXTDICT_ROW
},
{
ZSTD_COMPRESSBLOCK_GREEDY_DICTMATCHSTATE_ROW,
ZSTD_COMPRESSBLOCK_LAZY_DICTMATCHSTATE_ROW,
ZSTD_COMPRESSBLOCK_LAZY2_DICTMATCHSTATE_ROW
},
{
ZSTD_COMPRESSBLOCK_GREEDY_DEDICATEDDICTSEARCH_ROW,
ZSTD_COMPRESSBLOCK_LAZY_DEDICATEDDICTSEARCH_ROW,
ZSTD_COMPRESSBLOCK_LAZY2_DEDICATEDDICTSEARCH_ROW
}
};
DEBUGLOG(4, "Selecting a row-based matchfinder");
assert(useRowMatchFinder != ZSTD_ps_auto);
@ -3192,7 +3248,7 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
/* External matchfinder + LDM is technically possible, just not implemented yet.
* We need to revisit soon and implement it. */
RETURN_ERROR_IF(
zc->appliedParams.useSequenceProducer,
ZSTD_hasExtSeqProd(&zc->appliedParams),
parameter_combination_unsupported,
"Long-distance matching with external sequence producer enabled is not currently supported."
);
@ -3211,7 +3267,7 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
/* External matchfinder + LDM is technically possible, just not implemented yet.
* We need to revisit soon and implement it. */
RETURN_ERROR_IF(
zc->appliedParams.useSequenceProducer,
ZSTD_hasExtSeqProd(&zc->appliedParams),
parameter_combination_unsupported,
"Long-distance matching with external sequence producer enabled is not currently supported."
);
@ -3230,18 +3286,18 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
zc->appliedParams.useRowMatchFinder,
src, srcSize);
assert(ldmSeqStore.pos == ldmSeqStore.size);
} else if (zc->appliedParams.useSequenceProducer) {
} else if (ZSTD_hasExtSeqProd(&zc->appliedParams)) {
assert(
zc->externalMatchCtx.seqBufferCapacity >= ZSTD_sequenceBound(srcSize)
zc->extSeqBufCapacity >= ZSTD_sequenceBound(srcSize)
);
assert(zc->externalMatchCtx.mFinder != NULL);
assert(zc->appliedParams.extSeqProdFunc != NULL);
{ U32 const windowSize = (U32)1 << zc->appliedParams.cParams.windowLog;
size_t const nbExternalSeqs = (zc->externalMatchCtx.mFinder)(
zc->externalMatchCtx.mState,
zc->externalMatchCtx.seqBuffer,
zc->externalMatchCtx.seqBufferCapacity,
size_t const nbExternalSeqs = (zc->appliedParams.extSeqProdFunc)(
zc->appliedParams.extSeqProdState,
zc->extSeqBuf,
zc->extSeqBufCapacity,
src, srcSize,
NULL, 0, /* dict and dictSize, currently not supported */
zc->appliedParams.compressionLevel,
@ -3249,21 +3305,21 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
);
size_t const nbPostProcessedSeqs = ZSTD_postProcessSequenceProducerResult(
zc->externalMatchCtx.seqBuffer,
zc->extSeqBuf,
nbExternalSeqs,
zc->externalMatchCtx.seqBufferCapacity,
zc->extSeqBufCapacity,
srcSize
);
/* Return early if there is no error, since we don't need to worry about last literals */
if (!ZSTD_isError(nbPostProcessedSeqs)) {
ZSTD_sequencePosition seqPos = {0,0,0};
size_t const seqLenSum = ZSTD_fastSequenceLengthSum(zc->externalMatchCtx.seqBuffer, nbPostProcessedSeqs);
size_t const seqLenSum = ZSTD_fastSequenceLengthSum(zc->extSeqBuf, nbPostProcessedSeqs);
RETURN_ERROR_IF(seqLenSum > srcSize, externalSequences_invalid, "External sequences imply too large a block!");
FORWARD_IF_ERROR(
ZSTD_copySequencesToSeqStoreExplicitBlockDelim(
zc, &seqPos,
zc->externalMatchCtx.seqBuffer, nbPostProcessedSeqs,
zc->extSeqBuf, nbPostProcessedSeqs,
src, srcSize,
zc->appliedParams.searchForExternalRepcodes
),
@ -3280,7 +3336,9 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
}
/* Fallback to software matchfinder */
{ ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(zc->appliedParams.cParams.strategy,
{ ZSTD_blockCompressor const blockCompressor =
ZSTD_selectBlockCompressor(
zc->appliedParams.cParams.strategy,
zc->appliedParams.useRowMatchFinder,
dictMode);
ms->ldmSeqStore = NULL;
@ -3292,7 +3350,8 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
lastLLSize = blockCompressor(ms, &zc->seqStore, zc->blockState.nextCBlock->rep, src, srcSize);
} }
} else { /* not long range mode and no external matchfinder */
ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(zc->appliedParams.cParams.strategy,
ZSTD_blockCompressor const blockCompressor = ZSTD_selectBlockCompressor(
zc->appliedParams.cParams.strategy,
zc->appliedParams.useRowMatchFinder,
dictMode);
ms->ldmSeqStore = NULL;
@ -3304,29 +3363,38 @@ static size_t ZSTD_buildSeqStore(ZSTD_CCtx* zc, const void* src, size_t srcSize)
return ZSTDbss_compress;
}
static void ZSTD_copyBlockSequences(ZSTD_CCtx* zc)
static size_t ZSTD_copyBlockSequences(SeqCollector* seqCollector, const seqStore_t* seqStore, const U32 prevRepcodes[ZSTD_REP_NUM])
{
const seqStore_t* seqStore = ZSTD_getSeqStore(zc);
const seqDef* seqStoreSeqs = seqStore->sequencesStart;
size_t seqStoreSeqSize = seqStore->sequences - seqStoreSeqs;
size_t seqStoreLiteralsSize = (size_t)(seqStore->lit - seqStore->litStart);
size_t literalsRead = 0;
size_t lastLLSize;
const seqDef* inSeqs = seqStore->sequencesStart;
const size_t nbInSequences = seqStore->sequences - inSeqs;
const size_t nbInLiterals = (size_t)(seqStore->lit - seqStore->litStart);
ZSTD_Sequence* outSeqs = &zc->seqCollector.seqStart[zc->seqCollector.seqIndex];
ZSTD_Sequence* outSeqs = seqCollector->seqIndex == 0 ? seqCollector->seqStart : seqCollector->seqStart + seqCollector->seqIndex;
const size_t nbOutSequences = nbInSequences + 1;
size_t nbOutLiterals = 0;
repcodes_t repcodes;
size_t i;
repcodes_t updatedRepcodes;
assert(zc->seqCollector.seqIndex + 1 < zc->seqCollector.maxSequences);
/* Ensure we have enough space for last literals "sequence" */
assert(zc->seqCollector.maxSequences >= seqStoreSeqSize + 1);
ZSTD_memcpy(updatedRepcodes.rep, zc->blockState.prevCBlock->rep, sizeof(repcodes_t));
for (i = 0; i < seqStoreSeqSize; ++i) {
U32 rawOffset = seqStoreSeqs[i].offBase - ZSTD_REP_NUM;
outSeqs[i].litLength = seqStoreSeqs[i].litLength;
outSeqs[i].matchLength = seqStoreSeqs[i].mlBase + MINMATCH;
/* Bounds check that we have enough space for every input sequence
* and the block delimiter
*/
assert(seqCollector->seqIndex <= seqCollector->maxSequences);
RETURN_ERROR_IF(
nbOutSequences > (size_t)(seqCollector->maxSequences - seqCollector->seqIndex),
dstSize_tooSmall,
"Not enough space to copy sequences");
ZSTD_memcpy(&repcodes, prevRepcodes, sizeof(repcodes));
for (i = 0; i < nbInSequences; ++i) {
U32 rawOffset;
outSeqs[i].litLength = inSeqs[i].litLength;
outSeqs[i].matchLength = inSeqs[i].mlBase + MINMATCH;
outSeqs[i].rep = 0;
/* Handle the possible single length >= 64K
* There can only be one because we add MINMATCH to every match length,
* and blocks are at most 128K.
*/
if (i == seqStore->longLengthPos) {
if (seqStore->longLengthType == ZSTD_llt_literalLength) {
outSeqs[i].litLength += 0x10000;
@ -3335,41 +3403,55 @@ static void ZSTD_copyBlockSequences(ZSTD_CCtx* zc)
}
}
if (seqStoreSeqs[i].offBase <= ZSTD_REP_NUM) {
/* Derive the correct offset corresponding to a repcode */
outSeqs[i].rep = seqStoreSeqs[i].offBase;
/* Determine the raw offset given the offBase, which may be a repcode. */
if (OFFBASE_IS_REPCODE(inSeqs[i].offBase)) {
const U32 repcode = OFFBASE_TO_REPCODE(inSeqs[i].offBase);
assert(repcode > 0);
outSeqs[i].rep = repcode;
if (outSeqs[i].litLength != 0) {
rawOffset = updatedRepcodes.rep[outSeqs[i].rep - 1];
rawOffset = repcodes.rep[repcode - 1];
} else {
if (outSeqs[i].rep == 3) {
rawOffset = updatedRepcodes.rep[0] - 1;
if (repcode == 3) {
assert(repcodes.rep[0] > 1);
rawOffset = repcodes.rep[0] - 1;
} else {
rawOffset = updatedRepcodes.rep[outSeqs[i].rep];
rawOffset = repcodes.rep[repcode];
}
}
} else {
rawOffset = OFFBASE_TO_OFFSET(inSeqs[i].offBase);
}
outSeqs[i].offset = rawOffset;
/* seqStoreSeqs[i].offset == offCode+1, and ZSTD_updateRep() expects offCode
so we provide seqStoreSeqs[i].offset - 1 */
ZSTD_updateRep(updatedRepcodes.rep,
seqStoreSeqs[i].offBase,
seqStoreSeqs[i].litLength == 0);
literalsRead += outSeqs[i].litLength;
/* Update repcode history for the sequence */
ZSTD_updateRep(repcodes.rep,
inSeqs[i].offBase,
inSeqs[i].litLength == 0);
nbOutLiterals += outSeqs[i].litLength;
}
/* Insert last literals (if any exist) in the block as a sequence with ml == off == 0.
* If there are no last literals, then we'll emit (of: 0, ml: 0, ll: 0), which is a marker
* for the block boundary, according to the API.
*/
assert(seqStoreLiteralsSize >= literalsRead);
lastLLSize = seqStoreLiteralsSize - literalsRead;
outSeqs[i].litLength = (U32)lastLLSize;
outSeqs[i].matchLength = outSeqs[i].offset = outSeqs[i].rep = 0;
seqStoreSeqSize++;
zc->seqCollector.seqIndex += seqStoreSeqSize;
assert(nbInLiterals >= nbOutLiterals);
{
const size_t lastLLSize = nbInLiterals - nbOutLiterals;
outSeqs[nbInSequences].litLength = (U32)lastLLSize;
outSeqs[nbInSequences].matchLength = 0;
outSeqs[nbInSequences].offset = 0;
assert(nbOutSequences == nbInSequences + 1);
}
seqCollector->seqIndex += nbOutSequences;
assert(seqCollector->seqIndex <= seqCollector->maxSequences);
return 0;
}
size_t ZSTD_sequenceBound(size_t srcSize) {
return (srcSize / ZSTD_MINMATCH_MIN) + 1;
const size_t maxNbSeq = (srcSize / ZSTD_MINMATCH_MIN) + 1;
const size_t maxNbDelims = (srcSize / ZSTD_BLOCKSIZE_MAX_MIN) + 1;
return maxNbSeq + maxNbDelims;
}
size_t ZSTD_generateSequences(ZSTD_CCtx* zc, ZSTD_Sequence* outSeqs,
@ -3378,6 +3460,16 @@ size_t ZSTD_generateSequences(ZSTD_CCtx* zc, ZSTD_Sequence* outSeqs,
const size_t dstCapacity = ZSTD_compressBound(srcSize);
void* dst = ZSTD_customMalloc(dstCapacity, ZSTD_defaultCMem);
SeqCollector seqCollector;
{
int targetCBlockSize;
FORWARD_IF_ERROR(ZSTD_CCtx_getParameter(zc, ZSTD_c_targetCBlockSize, &targetCBlockSize), "");
RETURN_ERROR_IF(targetCBlockSize != 0, parameter_unsupported, "targetCBlockSize != 0");
}
{
int nbWorkers;
FORWARD_IF_ERROR(ZSTD_CCtx_getParameter(zc, ZSTD_c_nbWorkers, &nbWorkers), "");
RETURN_ERROR_IF(nbWorkers != 0, parameter_unsupported, "nbWorkers != 0");
}
RETURN_ERROR_IF(dst == NULL, memory_allocation, "NULL pointer!");
@ -3387,8 +3479,12 @@ size_t ZSTD_generateSequences(ZSTD_CCtx* zc, ZSTD_Sequence* outSeqs,
seqCollector.maxSequences = outSeqsSize;
zc->seqCollector = seqCollector;
ZSTD_compress2(zc, dst, dstCapacity, src, srcSize);
{
const size_t ret = ZSTD_compress2(zc, dst, dstCapacity, src, srcSize);
ZSTD_customFree(dst, ZSTD_defaultCMem);
FORWARD_IF_ERROR(ret, "ZSTD_compress2 failed");
}
assert(zc->seqCollector.seqIndex <= ZSTD_sequenceBound(srcSize));
return zc->seqCollector.seqIndex;
}
@ -3981,8 +4077,9 @@ ZSTD_compressSeqStore_singleBlock(ZSTD_CCtx* zc,
cSeqsSize = 1;
}
/* Sequence collection not supported when block splitting */
if (zc->seqCollector.collectSequences) {
ZSTD_copyBlockSequences(zc);
FORWARD_IF_ERROR(ZSTD_copyBlockSequences(&zc->seqCollector, seqStore, dRepOriginal.rep), "copyBlockSequences failed");
ZSTD_blockState_confirmRepcodesAndEntropyTables(&zc->blockState);
return 0;
}
@ -4204,6 +4301,7 @@ ZSTD_compressBlock_splitBlock(ZSTD_CCtx* zc,
if (bss == ZSTDbss_noCompress) {
if (zc->blockState.prevCBlock->entropy.fse.offcode_repeatMode == FSE_repeat_valid)
zc->blockState.prevCBlock->entropy.fse.offcode_repeatMode = FSE_repeat_check;
RETURN_ERROR_IF(zc->seqCollector.collectSequences, sequenceProducer_failed, "Uncompressible block");
cSize = ZSTD_noCompressBlock(dst, dstCapacity, src, srcSize, lastBlock);
FORWARD_IF_ERROR(cSize, "ZSTD_noCompressBlock failed");
DEBUGLOG(4, "ZSTD_compressBlock_splitBlock: Nocompress block");
@ -4236,11 +4334,15 @@ ZSTD_compressBlock_internal(ZSTD_CCtx* zc,
{ const size_t bss = ZSTD_buildSeqStore(zc, src, srcSize);
FORWARD_IF_ERROR(bss, "ZSTD_buildSeqStore failed");
if (bss == ZSTDbss_noCompress) { cSize = 0; goto out; }
if (bss == ZSTDbss_noCompress) {
RETURN_ERROR_IF(zc->seqCollector.collectSequences, sequenceProducer_failed, "Uncompressible block");
cSize = 0;
goto out;
}
}
if (zc->seqCollector.collectSequences) {
ZSTD_copyBlockSequences(zc);
FORWARD_IF_ERROR(ZSTD_copyBlockSequences(&zc->seqCollector, ZSTD_getSeqStore(zc), zc->blockState.prevCBlock->rep), "copyBlockSequences failed");
ZSTD_blockState_confirmRepcodesAndEntropyTables(&zc->blockState);
return 0;
}
@ -4553,19 +4655,15 @@ size_t ZSTD_writeLastEmptyBlock(void* dst, size_t dstCapacity)
}
}
size_t ZSTD_referenceExternalSequences(ZSTD_CCtx* cctx, rawSeq* seq, size_t nbSeq)
void ZSTD_referenceExternalSequences(ZSTD_CCtx* cctx, rawSeq* seq, size_t nbSeq)
{
RETURN_ERROR_IF(cctx->stage != ZSTDcs_init, stage_wrong,
"wrong cctx stage");
RETURN_ERROR_IF(cctx->appliedParams.ldmParams.enableLdm == ZSTD_ps_enable,
parameter_unsupported,
"incompatible with ldm");
assert(cctx->stage == ZSTDcs_init);
assert(nbSeq == 0 || cctx->appliedParams.ldmParams.enableLdm != ZSTD_ps_enable);
cctx->externSeqStore.seq = seq;
cctx->externSeqStore.size = nbSeq;
cctx->externSeqStore.capacity = nbSeq;
cctx->externSeqStore.pos = 0;
cctx->externSeqStore.posInSequence = 0;
return 0;
}
@ -4760,12 +4858,19 @@ static size_t ZSTD_loadDictionaryContent(ZSTD_matchState_t* ms,
ZSTD_fillHashTable(ms, iend, dtlm, tfp);
break;
case ZSTD_dfast:
#ifndef ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR
ZSTD_fillDoubleHashTable(ms, iend, dtlm, tfp);
#else
assert(0); /* shouldn't be called: cparams should've been adjusted. */
#endif
break;
case ZSTD_greedy:
case ZSTD_lazy:
case ZSTD_lazy2:
#if !defined(ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR)
assert(srcSize >= HASH_READ_SIZE);
if (ms->dedicatedDictSearch) {
assert(ms->chainTable != NULL);
@ -4782,14 +4887,23 @@ static size_t ZSTD_loadDictionaryContent(ZSTD_matchState_t* ms,
DEBUGLOG(4, "Using chain-based hash table for lazy dict");
}
}
#else
assert(0); /* shouldn't be called: cparams should've been adjusted. */
#endif
break;
case ZSTD_btlazy2: /* we want the dictionary table fully sorted */
case ZSTD_btopt:
case ZSTD_btultra:
case ZSTD_btultra2:
#if !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR)
assert(srcSize >= HASH_READ_SIZE);
ZSTD_updateTree(ms, iend-HASH_READ_SIZE, iend);
#else
assert(0); /* shouldn't be called: cparams should've been adjusted. */
#endif
break;
default:
@ -4836,11 +4950,10 @@ size_t ZSTD_loadCEntropy(ZSTD_compressedBlockState_t* bs, void* workspace,
/* We only set the loaded table as valid if it contains all non-zero
* weights. Otherwise, we set it to check */
if (!hasZeroWeights)
if (!hasZeroWeights && maxSymbolValue == 255)
bs->entropy.huf.repeatMode = HUF_repeat_valid;
RETURN_ERROR_IF(HUF_isError(hufHeaderSize), dictionary_corrupted, "");
RETURN_ERROR_IF(maxSymbolValue < 255, dictionary_corrupted, "");
dictPtr += hufHeaderSize;
}
@ -5107,14 +5220,13 @@ static size_t ZSTD_writeEpilogue(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity)
{
BYTE* const ostart = (BYTE*)dst;
BYTE* op = ostart;
size_t fhSize = 0;
DEBUGLOG(4, "ZSTD_writeEpilogue");
RETURN_ERROR_IF(cctx->stage == ZSTDcs_created, stage_wrong, "init missing");
/* special case : empty frame */
if (cctx->stage == ZSTDcs_init) {
fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, &cctx->appliedParams, 0, 0);
size_t fhSize = ZSTD_writeFrameHeader(dst, dstCapacity, &cctx->appliedParams, 0, 0);
FORWARD_IF_ERROR(fhSize, "ZSTD_writeFrameHeader failed");
dstCapacity -= fhSize;
op += fhSize;
@ -5124,8 +5236,9 @@ static size_t ZSTD_writeEpilogue(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity)
if (cctx->stage != ZSTDcs_ending) {
/* write one last empty block, make it the "last" block */
U32 const cBlockHeader24 = 1 /* last block */ + (((U32)bt_raw)<<1) + 0;
RETURN_ERROR_IF(dstCapacity<4, dstSize_tooSmall, "no room for epilogue");
MEM_writeLE32(op, cBlockHeader24);
ZSTD_STATIC_ASSERT(ZSTD_BLOCKHEADERSIZE == 3);
RETURN_ERROR_IF(dstCapacity<3, dstSize_tooSmall, "no room for epilogue");
MEM_writeLE24(op, cBlockHeader24);
op += ZSTD_blockHeaderSize;
dstCapacity -= ZSTD_blockHeaderSize;
}
@ -5455,7 +5568,7 @@ ZSTD_CDict* ZSTD_createCDict_advanced2(
cctxParams.useRowMatchFinder, cctxParams.enableDedicatedDictSearch,
customMem);
if (ZSTD_isError( ZSTD_initCDict_internal(cdict,
if (!cdict || ZSTD_isError( ZSTD_initCDict_internal(cdict,
dict, dictSize,
dictLoadMethod, dictContentType,
cctxParams) )) {
@ -5879,7 +5992,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream* zcs,
if (zcs->appliedParams.inBufferMode == ZSTD_bm_stable) {
assert(input->pos >= zcs->stableIn_notConsumed);
input->pos -= zcs->stableIn_notConsumed;
ip -= zcs->stableIn_notConsumed;
if (ip) ip -= zcs->stableIn_notConsumed;
zcs->stableIn_notConsumed = 0;
}
if (zcs->appliedParams.inBufferMode == ZSTD_bm_buffered) {
@ -6138,7 +6251,7 @@ static size_t ZSTD_CCtx_init_compressStream2(ZSTD_CCtx* cctx,
#ifdef ZSTD_MULTITHREAD
/* If external matchfinder is enabled, make sure to fail before checking job size (for consistency) */
RETURN_ERROR_IF(
params.useSequenceProducer == 1 && params.nbWorkers >= 1,
ZSTD_hasExtSeqProd(&params) && params.nbWorkers >= 1,
parameter_combination_unsupported,
"External sequence producer isn't supported with nbWorkers >= 1"
);
@ -6430,7 +6543,7 @@ ZSTD_copySequencesToSeqStoreExplicitBlockDelim(ZSTD_CCtx* cctx,
if (cctx->appliedParams.validateSequences) {
seqPos->posInSrc += litLength + matchLength;
FORWARD_IF_ERROR(ZSTD_validateSequence(offBase, matchLength, cctx->appliedParams.cParams.minMatch, seqPos->posInSrc,
cctx->appliedParams.cParams.windowLog, dictSize, cctx->appliedParams.useSequenceProducer),
cctx->appliedParams.cParams.windowLog, dictSize, ZSTD_hasExtSeqProd(&cctx->appliedParams)),
"Sequence validation failed");
}
RETURN_ERROR_IF(idx - seqPos->idx >= cctx->seqStore.maxNbSeq, externalSequences_invalid,
@ -6568,7 +6681,7 @@ ZSTD_copySequencesToSeqStoreNoBlockDelim(ZSTD_CCtx* cctx, ZSTD_sequencePosition*
if (cctx->appliedParams.validateSequences) {
seqPos->posInSrc += litLength + matchLength;
FORWARD_IF_ERROR(ZSTD_validateSequence(offBase, matchLength, cctx->appliedParams.cParams.minMatch, seqPos->posInSrc,
cctx->appliedParams.cParams.windowLog, dictSize, cctx->appliedParams.useSequenceProducer),
cctx->appliedParams.cParams.windowLog, dictSize, ZSTD_hasExtSeqProd(&cctx->appliedParams)),
"Sequence validation failed");
}
DEBUGLOG(6, "Storing sequence: (of: %u, ml: %u, ll: %u)", offBase, matchLength, litLength);
@ -7014,19 +7127,27 @@ ZSTD_parameters ZSTD_getParams(int compressionLevel, unsigned long long srcSizeH
}
void ZSTD_registerSequenceProducer(
ZSTD_CCtx* zc, void* mState,
ZSTD_sequenceProducer_F* mFinder
ZSTD_CCtx* zc,
void* extSeqProdState,
ZSTD_sequenceProducer_F extSeqProdFunc
) {
if (mFinder != NULL) {
ZSTD_externalMatchCtx emctx;
emctx.mState = mState;
emctx.mFinder = mFinder;
emctx.seqBuffer = NULL;
emctx.seqBufferCapacity = 0;
zc->externalMatchCtx = emctx;
zc->requestedParams.useSequenceProducer = 1;
assert(zc != NULL);
ZSTD_CCtxParams_registerSequenceProducer(
&zc->requestedParams, extSeqProdState, extSeqProdFunc
);
}
void ZSTD_CCtxParams_registerSequenceProducer(
ZSTD_CCtx_params* params,
void* extSeqProdState,
ZSTD_sequenceProducer_F extSeqProdFunc
) {
assert(params != NULL);
if (extSeqProdFunc != NULL) {
params->extSeqProdFunc = extSeqProdFunc;
params->extSeqProdState = extSeqProdState;
} else {
ZSTD_memset(&zc->externalMatchCtx, 0, sizeof(zc->externalMatchCtx));
zc->requestedParams.useSequenceProducer = 0;
params->extSeqProdFunc = NULL;
params->extSeqProdState = NULL;
}
}

56
zstd/compress/zstd_compress_internal.h
View File

@ -39,7 +39,7 @@ extern "C" {
It's not a big deal though : candidate will just be sorted again.
Additionally, candidate position 1 will be lost.
But candidate 1 cannot hide a large tree of candidates, so it's a minimal loss.
The benefit is that ZSTD_DUBT_UNSORTED_MARK cannot be mishandled after table re-use with a different strategy.
The benefit is that ZSTD_DUBT_UNSORTED_MARK cannot be mishandled after table reuse with a different strategy.
This constant is required by ZSTD_compressBlock_btlazy2() and ZSTD_reduceTable_internal() */
@ -159,23 +159,24 @@ typedef struct {
UNUSED_ATTR static const rawSeqStore_t kNullRawSeqStore = {NULL, 0, 0, 0, 0};
typedef struct {
int price;
U32 off;
U32 mlen;
U32 litlen;
U32 rep[ZSTD_REP_NUM];
int price; /* price from beginning of segment to this position */
U32 off; /* offset of previous match */
U32 mlen; /* length of previous match */
U32 litlen; /* nb of literals since previous match */
U32 rep[ZSTD_REP_NUM]; /* offset history after previous match */
} ZSTD_optimal_t;
typedef enum { zop_dynamic=0, zop_predef } ZSTD_OptPrice_e;
#define ZSTD_OPT_SIZE (ZSTD_OPT_NUM+3)
typedef struct {
/* All tables are allocated inside cctx->workspace by ZSTD_resetCCtx_internal() */
unsigned* litFreq; /* table of literals statistics, of size 256 */
unsigned* litLengthFreq; /* table of litLength statistics, of size (MaxLL+1) */
unsigned* matchLengthFreq; /* table of matchLength statistics, of size (MaxML+1) */
unsigned* offCodeFreq; /* table of offCode statistics, of size (MaxOff+1) */
ZSTD_match_t* matchTable; /* list of found matches, of size ZSTD_OPT_NUM+1 */
ZSTD_optimal_t* priceTable; /* All positions tracked by optimal parser, of size ZSTD_OPT_NUM+1 */
ZSTD_match_t* matchTable; /* list of found matches, of size ZSTD_OPT_SIZE */
ZSTD_optimal_t* priceTable; /* All positions tracked by optimal parser, of size ZSTD_OPT_SIZE */
U32 litSum; /* nb of literals */
U32 litLengthSum; /* nb of litLength codes */
@ -228,7 +229,7 @@ struct ZSTD_matchState_t {
U32 rowHashLog; /* For row-based matchfinder: Hashlog based on nb of rows in the hashTable.*/
BYTE* tagTable; /* For row-based matchFinder: A row-based table containing the hashes and head index. */
U32 hashCache[ZSTD_ROW_HASH_CACHE_SIZE]; /* For row-based matchFinder: a cache of hashes to improve speed */
U64 hashSalt; /* For row-based matchFinder: salts the hash for re-use of tag table */
U64 hashSalt; /* For row-based matchFinder: salts the hash for reuse of tag table */
U32 hashSaltEntropy; /* For row-based matchFinder: collects entropy for salt generation */
U32* hashTable;
@ -360,10 +361,11 @@ struct ZSTD_CCtx_params_s {
* if the external matchfinder returns an error code. */
int enableMatchFinderFallback;
/* Indicates whether an external matchfinder has been referenced.
* Users can't set this externally.
* It is set internally in ZSTD_registerSequenceProducer(). */
int useSequenceProducer;
/* Parameters for the external sequence producer API.
* Users set these parameters through ZSTD_registerSequenceProducer().
* It is not possible to set these parameters individually through the public API. */
void* extSeqProdState;
ZSTD_sequenceProducer_F extSeqProdFunc;
/* Adjust the max block size*/
size_t maxBlockSize;
@ -401,14 +403,6 @@ typedef struct {
ZSTD_entropyCTablesMetadata_t entropyMetadata;
} ZSTD_blockSplitCtx;
/* Context for block-level external matchfinder API */
typedef struct {
void* mState;
ZSTD_sequenceProducer_F* mFinder;
ZSTD_Sequence* seqBuffer;
size_t seqBufferCapacity;
} ZSTD_externalMatchCtx;
struct ZSTD_CCtx_s {
ZSTD_compressionStage_e stage;
int cParamsChanged; /* == 1 if cParams(except wlog) or compression level are changed in requestedParams. Triggers transmission of new params to ZSTDMT (if available) then reset to 0. */
@ -479,8 +473,9 @@ struct ZSTD_CCtx_s {
/* Workspace for block splitter */
ZSTD_blockSplitCtx blockSplitCtx;
/* Workspace for external matchfinder */
ZSTD_externalMatchCtx externalMatchCtx;
/* Buffer for output from external sequence producer */
ZSTD_Sequence* extSeqBuf;
size_t extSeqBufCapacity;
};
typedef enum { ZSTD_dtlm_fast, ZSTD_dtlm_full } ZSTD_dictTableLoadMethod_e;
@ -1053,7 +1048,9 @@ MEM_STATIC U32 ZSTD_window_needOverflowCorrection(ZSTD_window_t const window,
* The least significant cycleLog bits of the indices must remain the same,
* which may be 0. Every index up to maxDist in the past must be valid.
*/
MEM_STATIC U32 ZSTD_window_correctOverflow(ZSTD_window_t* window, U32 cycleLog,
MEM_STATIC
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_window_correctOverflow(ZSTD_window_t* window, U32 cycleLog,
U32 maxDist, void const* src)
{
/* preemptive overflow correction:
@ -1246,7 +1243,9 @@ MEM_STATIC void ZSTD_window_init(ZSTD_window_t* window) {
* forget about the extDict. Handles overlap of the prefix and extDict.
* Returns non-zero if the segment is contiguous.
*/
MEM_STATIC U32 ZSTD_window_update(ZSTD_window_t* window,
MEM_STATIC
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_window_update(ZSTD_window_t* window,
void const* src, size_t srcSize,
int forceNonContiguous)
{
@ -1467,11 +1466,10 @@ size_t ZSTD_writeLastEmptyBlock(void* dst, size_t dstCapacity);
* This cannot be used when long range matching is enabled.
* Zstd will use these sequences, and pass the literals to a secondary block
* compressor.
* @return : An error code on failure.
* NOTE: seqs are not verified! Invalid sequences can cause out-of-bounds memory
* access and data corruption.
*/
size_t ZSTD_referenceExternalSequences(ZSTD_CCtx* cctx, rawSeq* seq, size_t nbSeq);
void ZSTD_referenceExternalSequences(ZSTD_CCtx* cctx, rawSeq* seq, size_t nbSeq);
/** ZSTD_cycleLog() :
* condition for correct operation : hashLog > 1 */
@ -1509,6 +1507,10 @@ ZSTD_copySequencesToSeqStoreNoBlockDelim(ZSTD_CCtx* cctx, ZSTD_sequencePosition*
const ZSTD_Sequence* const inSeqs, size_t inSeqsSize,
const void* src, size_t blockSize, ZSTD_paramSwitch_e externalRepSearch);
/* Returns 1 if an external sequence producer is registered, otherwise returns 0. */
MEM_STATIC int ZSTD_hasExtSeqProd(const ZSTD_CCtx_params* params) {
return params->extSeqProdFunc != NULL;
}
/* ===============================================================
* Deprecated definitions that are still used internally to avoid

283
zstd/compress/zstd_compress_superblock.c
View File

@ -76,8 +76,8 @@ ZSTD_compressSubBlock_literal(const HUF_CElt* hufTable,
}
{ int const flags = bmi2 ? HUF_flags_bmi2 : 0;
const size_t cSize = singleStream ? HUF_compress1X_usingCTable(op, oend-op, literals, litSize, hufTable, flags)
: HUF_compress4X_usingCTable(op, oend-op, literals, litSize, hufTable, flags);
const size_t cSize = singleStream ? HUF_compress1X_usingCTable(op, (size_t)(oend-op), literals, litSize, hufTable, flags)
: HUF_compress4X_usingCTable(op, (size_t)(oend-op), literals, litSize, hufTable, flags);
op += cSize;
cLitSize += cSize;
if (cSize == 0 || ERR_isError(cSize)) {
@ -102,7 +102,7 @@ ZSTD_compressSubBlock_literal(const HUF_CElt* hufTable,
switch(lhSize)
{
case 3: /* 2 - 2 - 10 - 10 */
{ U32 const lhc = hType + ((!singleStream) << 2) + ((U32)litSize<<4) + ((U32)cLitSize<<14);
{ U32 const lhc = hType + ((U32)(!singleStream) << 2) + ((U32)litSize<<4) + ((U32)cLitSize<<14);
MEM_writeLE24(ostart, lhc);
break;
}
@ -122,30 +122,30 @@ ZSTD_compressSubBlock_literal(const HUF_CElt* hufTable,
}
*entropyWritten = 1;
DEBUGLOG(5, "Compressed literals: %u -> %u", (U32)litSize, (U32)(op-ostart));
return op-ostart;
return (size_t)(op-ostart);
}
static size_t
ZSTD_seqDecompressedSize(seqStore_t const* seqStore,
const seqDef* sequences, size_t nbSeq,
size_t litSize, int lastSequence)
const seqDef* sequences, size_t nbSeqs,
size_t litSize, int lastSubBlock)
{
const seqDef* const sstart = sequences;
const seqDef* const send = sequences + nbSeq;
const seqDef* sp = sstart;
size_t matchLengthSum = 0;
size_t litLengthSum = 0;
(void)(litLengthSum); /* suppress unused variable warning on some environments */
while (send-sp > 0) {
ZSTD_sequenceLength const seqLen = ZSTD_getSequenceLength(seqStore, sp);
size_t n;
for (n=0; n<nbSeqs; n++) {
const ZSTD_sequenceLength seqLen = ZSTD_getSequenceLength(seqStore, sequences+n);
litLengthSum += seqLen.litLength;
matchLengthSum += seqLen.matchLength;
sp++;
}
assert(litLengthSum <= litSize);
if (!lastSequence) {
DEBUGLOG(5, "ZSTD_seqDecompressedSize: %u sequences from %p: %u literals + %u matchlength",
(unsigned)nbSeqs, (const void*)sequences,
(unsigned)litLengthSum, (unsigned)matchLengthSum);
if (!lastSubBlock)
assert(litLengthSum == litSize);
}
else
assert(litLengthSum <= litSize);
(void)litLengthSum;
return matchLengthSum + litSize;
}
@ -180,14 +180,14 @@ ZSTD_compressSubBlock_sequences(const ZSTD_fseCTables_t* fseTables,
/* Sequences Header */
RETURN_ERROR_IF((oend-op) < 3 /*max nbSeq Size*/ + 1 /*seqHead*/,
dstSize_tooSmall, "");
if (nbSeq < 0x7F)
if (nbSeq < 128)
*op++ = (BYTE)nbSeq;
else if (nbSeq < LONGNBSEQ)
op[0] = (BYTE)((nbSeq>>8) + 0x80), op[1] = (BYTE)nbSeq, op+=2;
else
op[0]=0xFF, MEM_writeLE16(op+1, (U16)(nbSeq - LONGNBSEQ)), op+=3;
if (nbSeq==0) {
return op - ostart;
return (size_t)(op - ostart);
}
/* seqHead : flags for FSE encoding type */
@ -209,7 +209,7 @@ ZSTD_compressSubBlock_sequences(const ZSTD_fseCTables_t* fseTables,
}
{ size_t const bitstreamSize = ZSTD_encodeSequences(
op, oend - op,
op, (size_t)(oend - op),
fseTables->matchlengthCTable, mlCode,
fseTables->offcodeCTable, ofCode,
fseTables->litlengthCTable, llCode,
@ -253,7 +253,7 @@ ZSTD_compressSubBlock_sequences(const ZSTD_fseCTables_t* fseTables,
#endif
*entropyWritten = 1;
return op - ostart;
return (size_t)(op - ostart);
}
/** ZSTD_compressSubBlock() :
@ -279,7 +279,8 @@ static size_t ZSTD_compressSubBlock(const ZSTD_entropyCTables_t* entropy,
litSize, nbSeq, writeLitEntropy, writeSeqEntropy, lastBlock);
{ size_t cLitSize = ZSTD_compressSubBlock_literal((const HUF_CElt*)entropy->huf.CTable,
&entropyMetadata->hufMetadata, literals, litSize,
op, oend-op, bmi2, writeLitEntropy, litEntropyWritten);
op, (size_t)(oend-op),
bmi2, writeLitEntropy, litEntropyWritten);
FORWARD_IF_ERROR(cLitSize, "ZSTD_compressSubBlock_literal failed");
if (cLitSize == 0) return 0;
op += cLitSize;
@ -289,18 +290,18 @@ static size_t ZSTD_compressSubBlock(const ZSTD_entropyCTables_t* entropy,
sequences, nbSeq,
llCode, mlCode, ofCode,
cctxParams,
op, oend-op,
op, (size_t)(oend-op),
bmi2, writeSeqEntropy, seqEntropyWritten);
FORWARD_IF_ERROR(cSeqSize, "ZSTD_compressSubBlock_sequences failed");
if (cSeqSize == 0) return 0;
op += cSeqSize;
}
/* Write block header */
{ size_t cSize = (op-ostart)-ZSTD_blockHeaderSize;
{ size_t cSize = (size_t)(op-ostart) - ZSTD_blockHeaderSize;
U32 const cBlockHeader24 = lastBlock + (((U32)bt_compressed)<<1) + (U32)(cSize << 3);
MEM_writeLE24(ostart, cBlockHeader24);
}
return op-ostart;
return (size_t)(op-ostart);
}
static size_t ZSTD_estimateSubBlockSize_literal(const BYTE* literals, size_t litSize,
@ -389,7 +390,11 @@ static size_t ZSTD_estimateSubBlockSize_sequences(const BYTE* ofCodeTable,
return cSeqSizeEstimate + sequencesSectionHeaderSize;
}
static size_t ZSTD_estimateSubBlockSize(const BYTE* literals, size_t litSize,
typedef struct {
size_t estLitSize;
size_t estBlockSize;
} EstimatedBlockSize;
static EstimatedBlockSize ZSTD_estimateSubBlockSize(const BYTE* literals, size_t litSize,
const BYTE* ofCodeTable,
const BYTE* llCodeTable,
const BYTE* mlCodeTable,
@ -397,15 +402,17 @@ static size_t ZSTD_estimateSubBlockSize(const BYTE* literals, size_t litSize,
const ZSTD_entropyCTables_t* entropy,
const ZSTD_entropyCTablesMetadata_t* entropyMetadata,
void* workspace, size_t wkspSize,
int writeLitEntropy, int writeSeqEntropy) {
size_t cSizeEstimate = 0;
cSizeEstimate += ZSTD_estimateSubBlockSize_literal(literals, litSize,
int writeLitEntropy, int writeSeqEntropy)
{
EstimatedBlockSize ebs;
ebs.estLitSize = ZSTD_estimateSubBlockSize_literal(literals, litSize,
&entropy->huf, &entropyMetadata->hufMetadata,
workspace, wkspSize, writeLitEntropy);
cSizeEstimate += ZSTD_estimateSubBlockSize_sequences(ofCodeTable, llCodeTable, mlCodeTable,
ebs.estBlockSize = ZSTD_estimateSubBlockSize_sequences(ofCodeTable, llCodeTable, mlCodeTable,
nbSeq, &entropy->fse, &entropyMetadata->fseMetadata,
workspace, wkspSize, writeSeqEntropy);
return cSizeEstimate + ZSTD_blockHeaderSize;
ebs.estBlockSize += ebs.estLitSize + ZSTD_blockHeaderSize;
return ebs;
}
static int ZSTD_needSequenceEntropyTables(ZSTD_fseCTablesMetadata_t const* fseMetadata)
@ -419,13 +426,56 @@ static int ZSTD_needSequenceEntropyTables(ZSTD_fseCTablesMetadata_t const* fseMe
return 0;
}
static size_t countLiterals(seqStore_t const* seqStore, const seqDef* sp, size_t seqCount)
{
size_t n, total = 0;
assert(sp != NULL);
for (n=0; n<seqCount; n++) {
total += ZSTD_getSequenceLength(seqStore, sp+n).litLength;
}
DEBUGLOG(6, "countLiterals for %zu sequences from %p => %zu bytes", seqCount, (const void*)sp, total);
return total;
}
#define BYTESCALE 256
static size_t sizeBlockSequences(const seqDef* sp, size_t nbSeqs,
size_t targetBudget, size_t avgLitCost, size_t avgSeqCost,
int firstSubBlock)
{
size_t n, budget = 0, inSize=0;
/* entropy headers */
size_t const headerSize = (size_t)firstSubBlock * 120 * BYTESCALE; /* generous estimate */
assert(firstSubBlock==0 || firstSubBlock==1);
budget += headerSize;
/* first sequence => at least one sequence*/
budget += sp[0].litLength * avgLitCost + avgSeqCost;
if (budget > targetBudget) return 1;
inSize = sp[0].litLength + (sp[0].mlBase+MINMATCH);
/* loop over sequences */
for (n=1; n<nbSeqs; n++) {
size_t currentCost = sp[n].litLength * avgLitCost + avgSeqCost;
budget += currentCost;
inSize += sp[n].litLength + (sp[n].mlBase+MINMATCH);
/* stop when sub-block budget is reached */
if ( (budget > targetBudget)
/* though continue to expand until the sub-block is deemed compressible */
&& (budget < inSize * BYTESCALE) )
break;
}
return n;
}
/** ZSTD_compressSubBlock_multi() :
* Breaks super-block into multiple sub-blocks and compresses them.
* Entropy will be written to the first block.
* The following blocks will use repeat mode to compress.
* All sub-blocks are compressed blocks (no raw or rle blocks).
* @return : compressed size of the super block (which is multiple ZSTD blocks)
* Or 0 if it failed to compress. */
* Entropy will be written into the first block.
* The following blocks use repeat_mode to compress.
* Sub-blocks are all compressed, except the last one when beneficial.
* @return : compressed size of the super block (which features multiple ZSTD blocks)
* or 0 if it failed to compress. */
static size_t ZSTD_compressSubBlock_multi(const seqStore_t* seqStorePtr,
const ZSTD_compressedBlockState_t* prevCBlock,
ZSTD_compressedBlockState_t* nextCBlock,
@ -438,10 +488,12 @@ static size_t ZSTD_compressSubBlock_multi(const seqStore_t* seqStorePtr,
{
const seqDef* const sstart = seqStorePtr->sequencesStart;
const seqDef* const send = seqStorePtr->sequences;
const seqDef* sp = sstart;
const seqDef* sp = sstart; /* tracks progresses within seqStorePtr->sequences */
size_t const nbSeqs = (size_t)(send - sstart);
const BYTE* const lstart = seqStorePtr->litStart;
const BYTE* const lend = seqStorePtr->lit;
const BYTE* lp = lstart;
size_t const nbLiterals = (size_t)(lend - lstart);
BYTE const* ip = (BYTE const*)src;
BYTE const* const iend = ip + srcSize;
BYTE* const ostart = (BYTE*)dst;
@ -450,66 +502,73 @@ static size_t ZSTD_compressSubBlock_multi(const seqStore_t* seqStorePtr,
const BYTE* llCodePtr = seqStorePtr->llCode;
const BYTE* mlCodePtr = seqStorePtr->mlCode;
const BYTE* ofCodePtr = seqStorePtr->ofCode;
size_t targetCBlockSize = cctxParams->targetCBlockSize;
size_t litSize, seqCount;
int writeLitEntropy = entropyMetadata->hufMetadata.hType == set_compressed;
size_t const minTarget = ZSTD_TARGETCBLOCKSIZE_MIN; /* enforce minimum size, to reduce undesirable side effects */
size_t const targetCBlockSize = MAX(minTarget, cctxParams->targetCBlockSize);
int writeLitEntropy = (entropyMetadata->hufMetadata.hType == set_compressed);
int writeSeqEntropy = 1;
int lastSequence = 0;
DEBUGLOG(5, "ZSTD_compressSubBlock_multi (litSize=%u, nbSeq=%u)",
(unsigned)(lend-lp), (unsigned)(send-sstart));
DEBUGLOG(5, "ZSTD_compressSubBlock_multi (srcSize=%u, litSize=%u, nbSeq=%u)",
(unsigned)srcSize, (unsigned)(lend-lstart), (unsigned)(send-sstart));
litSize = 0;
seqCount = 0;
do {
size_t cBlockSizeEstimate = 0;
if (sstart == send) {
lastSequence = 1;
} else {
const seqDef* const sequence = sp + seqCount;
lastSequence = sequence == send - 1;
litSize += ZSTD_getSequenceLength(seqStorePtr, sequence).litLength;
seqCount++;
}
if (lastSequence) {
assert(lp <= lend);
assert(litSize <= (size_t)(lend - lp));
litSize = (size_t)(lend - lp);
}
/* I think there is an optimization opportunity here.
* Calling ZSTD_estimateSubBlockSize for every sequence can be wasteful
* since it recalculates estimate from scratch.
* For example, it would recount literal distribution and symbol codes every time.
*/
cBlockSizeEstimate = ZSTD_estimateSubBlockSize(lp, litSize, ofCodePtr, llCodePtr, mlCodePtr, seqCount,
/* let's start by a general estimation for the full block */
if (nbSeqs > 0) {
EstimatedBlockSize const ebs =
ZSTD_estimateSubBlockSize(lp, nbLiterals,
ofCodePtr, llCodePtr, mlCodePtr, nbSeqs,
&nextCBlock->entropy, entropyMetadata,
workspace, wkspSize, writeLitEntropy, writeSeqEntropy);
if (cBlockSizeEstimate > targetCBlockSize || lastSequence) {
int litEntropyWritten = 0;
workspace, wkspSize,
writeLitEntropy, writeSeqEntropy);
/* quick estimation */
size_t const avgLitCost = nbLiterals ? (ebs.estLitSize * BYTESCALE) / nbLiterals : BYTESCALE;
size_t const avgSeqCost = ((ebs.estBlockSize - ebs.estLitSize) * BYTESCALE) / nbSeqs;
const size_t nbSubBlocks = MAX((ebs.estBlockSize + (targetCBlockSize/2)) / targetCBlockSize, 1);
size_t n, avgBlockBudget, blockBudgetSupp=0;
avgBlockBudget = (ebs.estBlockSize * BYTESCALE) / nbSubBlocks;
DEBUGLOG(5, "estimated fullblock size=%u bytes ; avgLitCost=%.2f ; avgSeqCost=%.2f ; targetCBlockSize=%u, nbSubBlocks=%u ; avgBlockBudget=%.0f bytes",
(unsigned)ebs.estBlockSize, (double)avgLitCost/BYTESCALE, (double)avgSeqCost/BYTESCALE,
(unsigned)targetCBlockSize, (unsigned)nbSubBlocks, (double)avgBlockBudget/BYTESCALE);
/* simplification: if estimates states that the full superblock doesn't compress, just bail out immediately
* this will result in the production of a single uncompressed block covering @srcSize.*/
if (ebs.estBlockSize > srcSize) return 0;
/* compress and write sub-blocks */
assert(nbSubBlocks>0);
for (n=0; n < nbSubBlocks-1; n++) {
/* determine nb of sequences for current sub-block + nbLiterals from next sequence */
size_t const seqCount = sizeBlockSequences(sp, (size_t)(send-sp),
avgBlockBudget + blockBudgetSupp, avgLitCost, avgSeqCost, n==0);
/* if reached last sequence : break to last sub-block (simplification) */
assert(seqCount <= (size_t)(send-sp));
if (sp + seqCount == send) break;
assert(seqCount > 0);
/* compress sub-block */
{ int litEntropyWritten = 0;
int seqEntropyWritten = 0;
const size_t decompressedSize = ZSTD_seqDecompressedSize(seqStorePtr, sp, seqCount, litSize, lastSequence);
const size_t cSize = ZSTD_compressSubBlock(&nextCBlock->entropy, entropyMetadata,
size_t litSize = countLiterals(seqStorePtr, sp, seqCount);
const size_t decompressedSize =
ZSTD_seqDecompressedSize(seqStorePtr, sp, seqCount, litSize, 0);
size_t const cSize = ZSTD_compressSubBlock(&nextCBlock->entropy, entropyMetadata,
sp, seqCount,
lp, litSize,
llCodePtr, mlCodePtr, ofCodePtr,
cctxParams,
op, oend-op,
op, (size_t)(oend-op),
bmi2, writeLitEntropy, writeSeqEntropy,
&litEntropyWritten, &seqEntropyWritten,
lastBlock && lastSequence);
0);
FORWARD_IF_ERROR(cSize, "ZSTD_compressSubBlock failed");
/* check compressibility, update state components */
if (cSize > 0 && cSize < decompressedSize) {
DEBUGLOG(5, "Committed the sub-block");
DEBUGLOG(5, "Committed sub-block compressing %u bytes => %u bytes",
(unsigned)decompressedSize, (unsigned)cSize);
assert(ip + decompressedSize <= iend);
ip += decompressedSize;
sp += seqCount;
lp += litSize;
op += cSize;
llCodePtr += seqCount;
mlCodePtr += seqCount;
ofCodePtr += seqCount;
litSize = 0;
seqCount = 0;
/* Entropy only needs to be written once */
if (litEntropyWritten) {
writeLitEntropy = 0;
@ -517,29 +576,78 @@ static size_t ZSTD_compressSubBlock_multi(const seqStore_t* seqStorePtr,
if (seqEntropyWritten) {
writeSeqEntropy = 0;
}
sp += seqCount;
blockBudgetSupp = 0;
} }
/* otherwise : do not compress yet, coalesce current sub-block with following one */
}
} /* if (nbSeqs > 0) */
/* write last block */
DEBUGLOG(5, "Generate last sub-block: %u sequences remaining", (unsigned)(send - sp));
{ int litEntropyWritten = 0;
int seqEntropyWritten = 0;
size_t litSize = (size_t)(lend - lp);
size_t seqCount = (size_t)(send - sp);
const size_t decompressedSize =
ZSTD_seqDecompressedSize(seqStorePtr, sp, seqCount, litSize, 1);
size_t const cSize = ZSTD_compressSubBlock(&nextCBlock->entropy, entropyMetadata,
sp, seqCount,
lp, litSize,
llCodePtr, mlCodePtr, ofCodePtr,
cctxParams,
op, (size_t)(oend-op),
bmi2, writeLitEntropy, writeSeqEntropy,
&litEntropyWritten, &seqEntropyWritten,
lastBlock);
FORWARD_IF_ERROR(cSize, "ZSTD_compressSubBlock failed");
/* update pointers, the nb of literals borrowed from next sequence must be preserved */
if (cSize > 0 && cSize < decompressedSize) {
DEBUGLOG(5, "Last sub-block compressed %u bytes => %u bytes",
(unsigned)decompressedSize, (unsigned)cSize);
assert(ip + decompressedSize <= iend);
ip += decompressedSize;
lp += litSize;
op += cSize;
llCodePtr += seqCount;
mlCodePtr += seqCount;
ofCodePtr += seqCount;
/* Entropy only needs to be written once */
if (litEntropyWritten) {
writeLitEntropy = 0;
}
if (seqEntropyWritten) {
writeSeqEntropy = 0;
}
sp += seqCount;
}
}
} while (!lastSequence);
if (writeLitEntropy) {
DEBUGLOG(5, "ZSTD_compressSubBlock_multi has literal entropy tables unwritten");
DEBUGLOG(5, "Literal entropy tables were never written");
ZSTD_memcpy(&nextCBlock->entropy.huf, &prevCBlock->entropy.huf, sizeof(prevCBlock->entropy.huf));
}
if (writeSeqEntropy && ZSTD_needSequenceEntropyTables(&entropyMetadata->fseMetadata)) {
/* If we haven't written our entropy tables, then we've violated our contract and
* must emit an uncompressed block.
*/
DEBUGLOG(5, "ZSTD_compressSubBlock_multi has sequence entropy tables unwritten");
DEBUGLOG(5, "Sequence entropy tables were never written => cancel, emit an uncompressed block");
return 0;
}
if (ip < iend) {
size_t const cSize = ZSTD_noCompressBlock(op, oend - op, ip, iend - ip, lastBlock);
DEBUGLOG(5, "ZSTD_compressSubBlock_multi last sub-block uncompressed, %zu bytes", (size_t)(iend - ip));
/* some data left : last part of the block sent uncompressed */
size_t const rSize = (size_t)((iend - ip));
size_t const cSize = ZSTD_noCompressBlock(op, (size_t)(oend - op), ip, rSize, lastBlock);
DEBUGLOG(5, "Generate last uncompressed sub-block of %u bytes", (unsigned)(rSize));
FORWARD_IF_ERROR(cSize, "ZSTD_noCompressBlock failed");
assert(cSize != 0);
op += cSize;
/* We have to regenerate the repcodes because we've skipped some sequences */
if (sp < send) {
seqDef const* seq;
const seqDef* seq;
repcodes_t rep;
ZSTD_memcpy(&rep, prevCBlock->rep, sizeof(rep));
for (seq = sstart; seq < sp; ++seq) {
@ -548,14 +656,17 @@ static size_t ZSTD_compressSubBlock_multi(const seqStore_t* seqStorePtr,
ZSTD_memcpy(nextCBlock->rep, &rep, sizeof(rep));
}
}
DEBUGLOG(5, "ZSTD_compressSubBlock_multi compressed");
return op-ostart;
DEBUGLOG(5, "ZSTD_compressSubBlock_multi compressed all subBlocks: total compressed size = %u",
(unsigned)(op-ostart));
return (size_t)(op-ostart);
}
size_t ZSTD_compressSuperBlock(ZSTD_CCtx* zc,
void* dst, size_t dstCapacity,
void const* src, size_t srcSize,
unsigned lastBlock) {
const void* src, size_t srcSize,
unsigned lastBlock)
{
ZSTD_entropyCTablesMetadata_t entropyMetadata;
FORWARD_IF_ERROR(ZSTD_buildBlockEntropyStats(&zc->seqStore,

32
zstd/compress/zstd_cwksp.h
View File

@ -192,6 +192,7 @@ MEM_STATIC void ZSTD_cwksp_assert_internal_consistency(ZSTD_cwksp* ws) {
{
intptr_t const offset = __msan_test_shadow(ws->initOnceStart,
(U8*)ZSTD_cwksp_initialAllocStart(ws) - (U8*)ws->initOnceStart);
(void)offset;
#if defined(ZSTD_MSAN_PRINT)
if(offset!=-1) {
__msan_print_shadow((U8*)ws->initOnceStart + offset - 8, 32);
@ -433,7 +434,7 @@ MEM_STATIC void* ZSTD_cwksp_reserve_aligned(ZSTD_cwksp* ws, size_t bytes)
/**
* Aligned on 64 bytes. These buffers have the special property that
* their values remain constrained, allowing us to re-use them without
* their values remain constrained, allowing us to reuse them without
* memset()-ing them.
*/
MEM_STATIC void* ZSTD_cwksp_reserve_table(ZSTD_cwksp* ws, size_t bytes)
@ -525,7 +526,7 @@ MEM_STATIC void ZSTD_cwksp_mark_tables_dirty(ZSTD_cwksp* ws)
DEBUGLOG(4, "cwksp: ZSTD_cwksp_mark_tables_dirty");
#if ZSTD_MEMORY_SANITIZER && !defined (ZSTD_MSAN_DONT_POISON_WORKSPACE)
/* To validate that the table re-use logic is sound, and that we don't
/* To validate that the table reuse logic is sound, and that we don't
* access table space that we haven't cleaned, we re-"poison" the table
* space every time we mark it dirty.
* Since tableValidEnd space and initOnce space may overlap we don't poison
@ -602,9 +603,9 @@ MEM_STATIC void ZSTD_cwksp_clear(ZSTD_cwksp* ws) {
DEBUGLOG(4, "cwksp: clearing!");
#if ZSTD_MEMORY_SANITIZER && !defined (ZSTD_MSAN_DONT_POISON_WORKSPACE)
/* To validate that the context re-use logic is sound, and that we don't
/* To validate that the context reuse logic is sound, and that we don't
* access stuff that this compression hasn't initialized, we re-"poison"
* the workspace except for the areas in which we expect memory re-use
* the workspace except for the areas in which we expect memory reuse
* without initialization (objects, valid tables area and init once
* memory). */
{
@ -635,6 +636,15 @@ MEM_STATIC void ZSTD_cwksp_clear(ZSTD_cwksp* ws) {
ZSTD_cwksp_assert_internal_consistency(ws);
}
MEM_STATIC size_t ZSTD_cwksp_sizeof(const ZSTD_cwksp* ws) {
return (size_t)((BYTE*)ws->workspaceEnd - (BYTE*)ws->workspace);
}
MEM_STATIC size_t ZSTD_cwksp_used(const ZSTD_cwksp* ws) {
return (size_t)((BYTE*)ws->tableEnd - (BYTE*)ws->workspace)
+ (size_t)((BYTE*)ws->workspaceEnd - (BYTE*)ws->allocStart);
}
/**
* The provided workspace takes ownership of the buffer [start, start+size).
* Any existing values in the workspace are ignored (the previously managed
@ -666,6 +676,11 @@ MEM_STATIC size_t ZSTD_cwksp_create(ZSTD_cwksp* ws, size_t size, ZSTD_customMem
MEM_STATIC void ZSTD_cwksp_free(ZSTD_cwksp* ws, ZSTD_customMem customMem) {
void *ptr = ws->workspace;
DEBUGLOG(4, "cwksp: freeing workspace");
#if ZSTD_MEMORY_SANITIZER && !defined(ZSTD_MSAN_DONT_POISON_WORKSPACE)
if (ptr != NULL && customMem.customFree != NULL) {
__msan_unpoison(ptr, ZSTD_cwksp_sizeof(ws));
}
#endif
ZSTD_memset(ws, 0, sizeof(ZSTD_cwksp));
ZSTD_customFree(ptr, customMem);
}
@ -679,15 +694,6 @@ MEM_STATIC void ZSTD_cwksp_move(ZSTD_cwksp* dst, ZSTD_cwksp* src) {
ZSTD_memset(src, 0, sizeof(ZSTD_cwksp));
}
MEM_STATIC size_t ZSTD_cwksp_sizeof(const ZSTD_cwksp* ws) {
return (size_t)((BYTE*)ws->workspaceEnd - (BYTE*)ws->workspace);
}
MEM_STATIC size_t ZSTD_cwksp_used(const ZSTD_cwksp* ws) {
return (size_t)((BYTE*)ws->tableEnd - (BYTE*)ws->workspace)
+ (size_t)((BYTE*)ws->workspaceEnd - (BYTE*)ws->allocStart);
}
MEM_STATIC int ZSTD_cwksp_reserve_failed(const ZSTD_cwksp* ws) {
return ws->allocFailed;
}

22
zstd/compress/zstd_double_fast.c
View File

@ -11,7 +11,11 @@
#include "zstd_compress_internal.h"
#include "zstd_double_fast.h"
static void ZSTD_fillDoubleHashTableForCDict(ZSTD_matchState_t* ms,
#ifndef ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_fillDoubleHashTableForCDict(ZSTD_matchState_t* ms,
void const* end, ZSTD_dictTableLoadMethod_e dtlm)
{
const ZSTD_compressionParameters* const cParams = &ms->cParams;
@ -47,7 +51,9 @@ static void ZSTD_fillDoubleHashTableForCDict(ZSTD_matchState_t* ms,
} }
}
static void ZSTD_fillDoubleHashTableForCCtx(ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_fillDoubleHashTableForCCtx(ZSTD_matchState_t* ms,
void const* end, ZSTD_dictTableLoadMethod_e dtlm)
{
const ZSTD_compressionParameters* const cParams = &ms->cParams;
@ -95,6 +101,7 @@ void ZSTD_fillDoubleHashTable(ZSTD_matchState_t* ms,
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_doubleFast_noDict_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize, U32 const mls /* template */)
@ -305,6 +312,7 @@ _match_stored:
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_doubleFast_dictMatchState_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize,
@ -348,8 +356,8 @@ size_t ZSTD_compressBlock_doubleFast_dictMatchState_generic(
if (ms->prefetchCDictTables) {
size_t const hashTableBytes = (((size_t)1) << dictCParams->hashLog) * sizeof(U32);
size_t const chainTableBytes = (((size_t)1) << dictCParams->chainLog) * sizeof(U32);
PREFETCH_AREA(dictHashLong, hashTableBytes)
PREFETCH_AREA(dictHashSmall, chainTableBytes)
PREFETCH_AREA(dictHashLong, hashTableBytes);
PREFETCH_AREA(dictHashSmall, chainTableBytes);
}
/* init */
@ -589,7 +597,9 @@ size_t ZSTD_compressBlock_doubleFast_dictMatchState(
}
static size_t ZSTD_compressBlock_doubleFast_extDict_generic(
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_doubleFast_extDict_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize,
U32 const mls /* template */)
@ -756,3 +766,5 @@ size_t ZSTD_compressBlock_doubleFast_extDict(
return ZSTD_compressBlock_doubleFast_extDict_7(ms, seqStore, rep, src, srcSize);
}
}
#endif /* ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR */

11
zstd/compress/zstd_double_fast.h
View File

@ -18,9 +18,12 @@ extern "C" {
#include "../common/mem.h" /* U32 */
#include "zstd_compress_internal.h" /* ZSTD_CCtx, size_t */
#ifndef ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR
void ZSTD_fillDoubleHashTable(ZSTD_matchState_t* ms,
void const* end, ZSTD_dictTableLoadMethod_e dtlm,
ZSTD_tableFillPurpose_e tfp);
size_t ZSTD_compressBlock_doubleFast(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
@ -31,6 +34,14 @@ size_t ZSTD_compressBlock_doubleFast_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#define ZSTD_COMPRESSBLOCK_DOUBLEFAST ZSTD_compressBlock_doubleFast
#define ZSTD_COMPRESSBLOCK_DOUBLEFAST_DICTMATCHSTATE ZSTD_compressBlock_doubleFast_dictMatchState
#define ZSTD_COMPRESSBLOCK_DOUBLEFAST_EXTDICT ZSTD_compressBlock_doubleFast_extDict
#else
#define ZSTD_COMPRESSBLOCK_DOUBLEFAST NULL
#define ZSTD_COMPRESSBLOCK_DOUBLEFAST_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_DOUBLEFAST_EXTDICT NULL
#endif /* ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR */
#if defined (__cplusplus)
}

20
zstd/compress/zstd_fast.c
View File

@ -11,7 +11,9 @@
#include "zstd_compress_internal.h" /* ZSTD_hashPtr, ZSTD_count, ZSTD_storeSeq */
#include "zstd_fast.h"
static void ZSTD_fillHashTableForCDict(ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_fillHashTableForCDict(ZSTD_matchState_t* ms,
const void* const end,
ZSTD_dictTableLoadMethod_e dtlm)
{
@ -46,7 +48,9 @@ static void ZSTD_fillHashTableForCDict(ZSTD_matchState_t* ms,
} } } }
}
static void ZSTD_fillHashTableForCCtx(ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_fillHashTableForCCtx(ZSTD_matchState_t* ms,
const void* const end,
ZSTD_dictTableLoadMethod_e dtlm)
{
@ -139,8 +143,9 @@ void ZSTD_fillHashTable(ZSTD_matchState_t* ms,
*
* This is also the work we do at the beginning to enter the loop initially.
*/
FORCE_INLINE_TEMPLATE size_t
ZSTD_compressBlock_fast_noDict_generic(
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_fast_noDict_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize,
U32 const mls, U32 const hasStep)
@ -456,6 +461,7 @@ size_t ZSTD_compressBlock_fast(
}
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_fast_dictMatchState_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize, U32 const mls, U32 const hasStep)
@ -502,7 +508,7 @@ size_t ZSTD_compressBlock_fast_dictMatchState_generic(
if (ms->prefetchCDictTables) {
size_t const hashTableBytes = (((size_t)1) << dictCParams->hashLog) * sizeof(U32);
PREFETCH_AREA(dictHashTable, hashTableBytes)
PREFETCH_AREA(dictHashTable, hashTableBytes);
}
/* init */
@ -681,7 +687,9 @@ size_t ZSTD_compressBlock_fast_dictMatchState(
}
static size_t ZSTD_compressBlock_fast_extDict_generic(
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_fast_extDict_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize, U32 const mls, U32 const hasStep)
{

302
zstd/compress/zstd_lazy.c
View File

@ -12,6 +12,11 @@
#include "zstd_lazy.h"
#include "../common/bits.h" /* ZSTD_countTrailingZeros64 */
#if !defined(ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR)
#define kLazySkippingStep 8
@ -19,8 +24,9 @@
* Binary Tree search
***************************************/
static void
ZSTD_updateDUBT(ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_updateDUBT(ZSTD_matchState_t* ms,
const BYTE* ip, const BYTE* iend,
U32 mls)
{
@ -63,8 +69,9 @@ ZSTD_updateDUBT(ZSTD_matchState_t* ms,
* sort one already inserted but unsorted position
* assumption : curr >= btlow == (curr - btmask)
* doesn't fail */
static void
ZSTD_insertDUBT1(const ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_insertDUBT1(const ZSTD_matchState_t* ms,
U32 curr, const BYTE* inputEnd,
U32 nbCompares, U32 btLow,
const ZSTD_dictMode_e dictMode)
@ -152,8 +159,9 @@ ZSTD_insertDUBT1(const ZSTD_matchState_t* ms,
}
static size_t
ZSTD_DUBT_findBetterDictMatch (
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_DUBT_findBetterDictMatch (
const ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iend,
size_t* offsetPtr,
@ -230,8 +238,9 @@ ZSTD_DUBT_findBetterDictMatch (
}
static size_t
ZSTD_DUBT_findBestMatch(ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_DUBT_findBestMatch(ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iend,
size_t* offBasePtr,
U32 const mls,
@ -381,8 +390,9 @@ ZSTD_DUBT_findBestMatch(ZSTD_matchState_t* ms,
/** ZSTD_BtFindBestMatch() : Tree updater, providing best match */
FORCE_INLINE_TEMPLATE size_t
ZSTD_BtFindBestMatch( ZSTD_matchState_t* ms,
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_BtFindBestMatch( ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iLimit,
size_t* offBasePtr,
const U32 mls /* template */,
@ -617,7 +627,9 @@ size_t ZSTD_dedicatedDictSearch_lazy_search(size_t* offsetPtr, size_t ml, U32 nb
/* Update chains up to ip (excluded)
Assumption : always within prefix (i.e. not within extDict) */
FORCE_INLINE_TEMPLATE U32 ZSTD_insertAndFindFirstIndex_internal(
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_insertAndFindFirstIndex_internal(
ZSTD_matchState_t* ms,
const ZSTD_compressionParameters* const cParams,
const BYTE* ip, U32 const mls, U32 const lazySkipping)
@ -651,6 +663,7 @@ U32 ZSTD_insertAndFindFirstIndex(ZSTD_matchState_t* ms, const BYTE* ip) {
/* inlining is important to hardwire a hot branch (template emulation) */
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_HcFindBestMatch(
ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iLimit,
@ -819,7 +832,9 @@ FORCE_INLINE_TEMPLATE void ZSTD_row_prefetch(U32 const* hashTable, BYTE const* t
* Fill up the hash cache starting at idx, prefetching up to ZSTD_ROW_HASH_CACHE_SIZE entries,
* but not beyond iLimit.
*/
FORCE_INLINE_TEMPLATE void ZSTD_row_fillHashCache(ZSTD_matchState_t* ms, const BYTE* base,
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_row_fillHashCache(ZSTD_matchState_t* ms, const BYTE* base,
U32 const rowLog, U32 const mls,
U32 idx, const BYTE* const iLimit)
{
@ -845,7 +860,9 @@ FORCE_INLINE_TEMPLATE void ZSTD_row_fillHashCache(ZSTD_matchState_t* ms, const B
* Returns the hash of base + idx, and replaces the hash in the hash cache with the byte at
* base + idx + ZSTD_ROW_HASH_CACHE_SIZE. Also prefetches the appropriate rows from hashTable and tagTable.
*/
FORCE_INLINE_TEMPLATE U32 ZSTD_row_nextCachedHash(U32* cache, U32 const* hashTable,
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_row_nextCachedHash(U32* cache, U32 const* hashTable,
BYTE const* tagTable, BYTE const* base,
U32 idx, U32 const hashLog,
U32 const rowLog, U32 const mls,
@ -863,7 +880,9 @@ FORCE_INLINE_TEMPLATE U32 ZSTD_row_nextCachedHash(U32* cache, U32 const* hashTab
/* ZSTD_row_update_internalImpl():
* Updates the hash table with positions starting from updateStartIdx until updateEndIdx.
*/
FORCE_INLINE_TEMPLATE void ZSTD_row_update_internalImpl(ZSTD_matchState_t* ms,
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_row_update_internalImpl(ZSTD_matchState_t* ms,
U32 updateStartIdx, U32 const updateEndIdx,
U32 const mls, U32 const rowLog,
U32 const rowMask, U32 const useCache)
@ -892,7 +911,9 @@ FORCE_INLINE_TEMPLATE void ZSTD_row_update_internalImpl(ZSTD_matchState_t* ms,
* Inserts the byte at ip into the appropriate position in the hash table, and updates ms->nextToUpdate.
* Skips sections of long matches as is necessary.
*/
FORCE_INLINE_TEMPLATE void ZSTD_row_update_internal(ZSTD_matchState_t* ms, const BYTE* ip,
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_row_update_internal(ZSTD_matchState_t* ms, const BYTE* ip,
U32 const mls, U32 const rowLog,
U32 const rowMask, U32 const useCache)
{
@ -1102,20 +1123,21 @@ ZSTD_row_getMatchMask(const BYTE* const tagRow, const BYTE tag, const U32 headGr
/* The high-level approach of the SIMD row based match finder is as follows:
* - Figure out where to insert the new entry:
* - Generate a hash from a byte along with an additional 1-byte "short hash". The additional byte is our "tag"
* - The hashTable is effectively split into groups or "rows" of 16 or 32 entries of U32, and the hash determines
* - Generate a hash for current input posistion and split it into a one byte of tag and `rowHashLog` bits of index.
* - The hash is salted by a value that changes on every contex reset, so when the same table is used
* we will avoid collisions that would otherwise slow us down by intorducing phantom matches.
* - The hashTable is effectively split into groups or "rows" of 15 or 31 entries of U32, and the index determines
* which row to insert into.
* - Determine the correct position within the row to insert the entry into. Each row of 16 or 32 can
* be considered as a circular buffer with a "head" index that resides in the tagTable.
* - Also insert the "tag" into the equivalent row and position in the tagTable.
* - Note: The tagTable has 17 or 33 1-byte entries per row, due to 16 or 32 tags, and 1 "head" entry.
* The 17 or 33 entry rows are spaced out to occur every 32 or 64 bytes, respectively,
* for alignment/performance reasons, leaving some bytes unused.
* - Use SIMD to efficiently compare the tags in the tagTable to the 1-byte "short hash" and
* - Determine the correct position within the row to insert the entry into. Each row of 15 or 31 can
* be considered as a circular buffer with a "head" index that resides in the tagTable (overall 16 or 32 bytes
* per row).
* - Use SIMD to efficiently compare the tags in the tagTable to the 1-byte tag calculated for the position and
* generate a bitfield that we can cycle through to check the collisions in the hash table.
* - Pick the longest match.
* - Insert the tag into the equivalent row and position in the tagTable.
*/
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_RowFindBestMatch(
ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iLimit,
@ -1489,8 +1511,9 @@ FORCE_INLINE_TEMPLATE size_t ZSTD_searchMax(
* Common parser - lazy strategy
*********************************/
FORCE_INLINE_TEMPLATE size_t
ZSTD_compressBlock_lazy_generic(
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_lazy_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore,
U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize,
@ -1754,29 +1777,10 @@ _storeSequence:
/* Return the last literals size */
return (size_t)(iend - anchor);
}
#endif /* build exclusions */
size_t ZSTD_compressBlock_btlazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_binaryTree, 2, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1, ZSTD_noDict);
}
#ifndef ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_greedy(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -1784,27 +1788,6 @@ size_t ZSTD_compressBlock_greedy(
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 0, ZSTD_noDict);
}
size_t ZSTD_compressBlock_btlazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_binaryTree, 2, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_lazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_lazy_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_greedy_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -1812,21 +1795,6 @@ size_t ZSTD_compressBlock_greedy_dictMatchState(
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 0, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2, ZSTD_dedicatedDictSearch);
}
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1, ZSTD_dedicatedDictSearch);
}
size_t ZSTD_compressBlock_greedy_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -1834,21 +1802,6 @@ size_t ZSTD_compressBlock_greedy_dedicatedDictSearch(
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 0, ZSTD_dedicatedDictSearch);
}
/* Row-based matchfinder */
size_t ZSTD_compressBlock_lazy2_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 2, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 1, ZSTD_noDict);
}
size_t ZSTD_compressBlock_greedy_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -1856,11 +1809,48 @@ size_t ZSTD_compressBlock_greedy_row(
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy2_dictMatchState_row(
size_t ZSTD_compressBlock_greedy_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 2, ZSTD_dictMatchState);
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_greedy_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0, ZSTD_dedicatedDictSearch);
}
#endif
#ifndef ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_lazy(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1, ZSTD_dedicatedDictSearch);
}
size_t ZSTD_compressBlock_lazy_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 1, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy_dictMatchState_row(
@ -1870,13 +1860,49 @@ size_t ZSTD_compressBlock_lazy_dictMatchState_row(
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 1, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_greedy_dictMatchState_row(
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0, ZSTD_dictMatchState);
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 1, ZSTD_dedicatedDictSearch);
}
#endif
#ifndef ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_lazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2, ZSTD_dedicatedDictSearch);
}
size_t ZSTD_compressBlock_lazy2_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 2, ZSTD_noDict);
}
size_t ZSTD_compressBlock_lazy2_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 2, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
@ -1884,22 +1910,30 @@ size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch_row(
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 2, ZSTD_dedicatedDictSearch);
}
#endif
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch_row(
#ifndef ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btlazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 1, ZSTD_dedicatedDictSearch);
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_binaryTree, 2, ZSTD_noDict);
}
size_t ZSTD_compressBlock_greedy_dedicatedDictSearch_row(
size_t ZSTD_compressBlock_btlazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0, ZSTD_dedicatedDictSearch);
return ZSTD_compressBlock_lazy_generic(ms, seqStore, rep, src, srcSize, search_binaryTree, 2, ZSTD_dictMatchState);
}
#endif
#if !defined(ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR)
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_compressBlock_lazy_extDict_generic(
ZSTD_matchState_t* ms, seqStore_t* seqStore,
U32 rep[ZSTD_REP_NUM],
@ -2101,8 +2135,9 @@ _storeSequence:
/* Return the last literals size */
return (size_t)(iend - anchor);
}
#endif /* build exclusions */
#ifndef ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_greedy_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -2110,6 +2145,15 @@ size_t ZSTD_compressBlock_greedy_extDict(
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 0);
}
size_t ZSTD_compressBlock_greedy_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0);
}
#endif
#ifndef ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_lazy_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -2118,29 +2162,6 @@ size_t ZSTD_compressBlock_lazy_extDict(
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 1);
}
size_t ZSTD_compressBlock_lazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2);
}
size_t ZSTD_compressBlock_btlazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_binaryTree, 2);
}
size_t ZSTD_compressBlock_greedy_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 0);
}
size_t ZSTD_compressBlock_lazy_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
@ -2148,6 +2169,16 @@ size_t ZSTD_compressBlock_lazy_extDict_row(
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 1);
}
#endif
#ifndef ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_lazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_hashChain, 2);
}
size_t ZSTD_compressBlock_lazy2_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
@ -2155,3 +2186,14 @@ size_t ZSTD_compressBlock_lazy2_extDict_row(
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_rowHash, 2);
}
#endif
#ifndef ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btlazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize)
{
return ZSTD_compressBlock_lazy_extDict_generic(ms, seqStore, rep, src, srcSize, search_binaryTree, 2);
}
#endif

177
zstd/compress/zstd_lazy.h
View File

@ -27,98 +27,173 @@ extern "C" {
#define ZSTD_ROW_HASH_TAG_BITS 8 /* nb bits to use for the tag */
#if !defined(ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR)
U32 ZSTD_insertAndFindFirstIndex(ZSTD_matchState_t* ms, const BYTE* ip);
void ZSTD_row_update(ZSTD_matchState_t* const ms, const BYTE* ip);
void ZSTD_dedicatedDictSearch_lazy_loadDictionary(ZSTD_matchState_t* ms, const BYTE* const ip);
void ZSTD_preserveUnsortedMark (U32* const table, U32 const size, U32 const reducerValue); /*! used in ZSTD_reduceIndex(). preemptively increase value of ZSTD_DUBT_UNSORTED_MARK */
#endif
size_t ZSTD_compressBlock_btlazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#ifndef ZSTD_EXCLUDE_GREEDY_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_greedy(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btlazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_greedy_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#define ZSTD_COMPRESSBLOCK_GREEDY ZSTD_compressBlock_greedy
#define ZSTD_COMPRESSBLOCK_GREEDY_ROW ZSTD_compressBlock_greedy_row
#define ZSTD_COMPRESSBLOCK_GREEDY_DICTMATCHSTATE ZSTD_compressBlock_greedy_dictMatchState
#define ZSTD_COMPRESSBLOCK_GREEDY_DICTMATCHSTATE_ROW ZSTD_compressBlock_greedy_dictMatchState_row
#define ZSTD_COMPRESSBLOCK_GREEDY_DEDICATEDDICTSEARCH ZSTD_compressBlock_greedy_dedicatedDictSearch
#define ZSTD_COMPRESSBLOCK_GREEDY_DEDICATEDDICTSEARCH_ROW ZSTD_compressBlock_greedy_dedicatedDictSearch_row
#define ZSTD_COMPRESSBLOCK_GREEDY_EXTDICT ZSTD_compressBlock_greedy_extDict
#define ZSTD_COMPRESSBLOCK_GREEDY_EXTDICT_ROW ZSTD_compressBlock_greedy_extDict_row
#else
#define ZSTD_COMPRESSBLOCK_GREEDY NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_ROW NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_DICTMATCHSTATE_ROW NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_DEDICATEDDICTSEARCH NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_DEDICATEDDICTSEARCH_ROW NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_EXTDICT NULL
#define ZSTD_COMPRESSBLOCK_GREEDY_EXTDICT_ROW NULL
#endif
#ifndef ZSTD_EXCLUDE_LAZY_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_lazy(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#define ZSTD_COMPRESSBLOCK_LAZY ZSTD_compressBlock_lazy
#define ZSTD_COMPRESSBLOCK_LAZY_ROW ZSTD_compressBlock_lazy_row
#define ZSTD_COMPRESSBLOCK_LAZY_DICTMATCHSTATE ZSTD_compressBlock_lazy_dictMatchState
#define ZSTD_COMPRESSBLOCK_LAZY_DICTMATCHSTATE_ROW ZSTD_compressBlock_lazy_dictMatchState_row
#define ZSTD_COMPRESSBLOCK_LAZY_DEDICATEDDICTSEARCH ZSTD_compressBlock_lazy_dedicatedDictSearch
#define ZSTD_COMPRESSBLOCK_LAZY_DEDICATEDDICTSEARCH_ROW ZSTD_compressBlock_lazy_dedicatedDictSearch_row
#define ZSTD_COMPRESSBLOCK_LAZY_EXTDICT ZSTD_compressBlock_lazy_extDict
#define ZSTD_COMPRESSBLOCK_LAZY_EXTDICT_ROW ZSTD_compressBlock_lazy_extDict_row
#else
#define ZSTD_COMPRESSBLOCK_LAZY NULL
#define ZSTD_COMPRESSBLOCK_LAZY_ROW NULL
#define ZSTD_COMPRESSBLOCK_LAZY_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_LAZY_DICTMATCHSTATE_ROW NULL
#define ZSTD_COMPRESSBLOCK_LAZY_DEDICATEDDICTSEARCH NULL
#define ZSTD_COMPRESSBLOCK_LAZY_DEDICATEDDICTSEARCH_ROW NULL
#define ZSTD_COMPRESSBLOCK_LAZY_EXTDICT NULL
#define ZSTD_COMPRESSBLOCK_LAZY_EXTDICT_ROW NULL
#endif
#ifndef ZSTD_EXCLUDE_LAZY2_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_lazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dictMatchState_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_dedicatedDictSearch_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_lazy2_extDict_row(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#define ZSTD_COMPRESSBLOCK_LAZY2 ZSTD_compressBlock_lazy2
#define ZSTD_COMPRESSBLOCK_LAZY2_ROW ZSTD_compressBlock_lazy2_row
#define ZSTD_COMPRESSBLOCK_LAZY2_DICTMATCHSTATE ZSTD_compressBlock_lazy2_dictMatchState
#define ZSTD_COMPRESSBLOCK_LAZY2_DICTMATCHSTATE_ROW ZSTD_compressBlock_lazy2_dictMatchState_row
#define ZSTD_COMPRESSBLOCK_LAZY2_DEDICATEDDICTSEARCH ZSTD_compressBlock_lazy2_dedicatedDictSearch
#define ZSTD_COMPRESSBLOCK_LAZY2_DEDICATEDDICTSEARCH_ROW ZSTD_compressBlock_lazy2_dedicatedDictSearch_row
#define ZSTD_COMPRESSBLOCK_LAZY2_EXTDICT ZSTD_compressBlock_lazy2_extDict
#define ZSTD_COMPRESSBLOCK_LAZY2_EXTDICT_ROW ZSTD_compressBlock_lazy2_extDict_row
#else
#define ZSTD_COMPRESSBLOCK_LAZY2 NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_ROW NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_DICTMATCHSTATE_ROW NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_DEDICATEDDICTSEARCH NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_DEDICATEDDICTSEARCH_ROW NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_EXTDICT NULL
#define ZSTD_COMPRESSBLOCK_LAZY2_EXTDICT_ROW NULL
#endif
#ifndef ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btlazy2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btlazy2_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btlazy2_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#define ZSTD_COMPRESSBLOCK_BTLAZY2 ZSTD_compressBlock_btlazy2
#define ZSTD_COMPRESSBLOCK_BTLAZY2_DICTMATCHSTATE ZSTD_compressBlock_btlazy2_dictMatchState
#define ZSTD_COMPRESSBLOCK_BTLAZY2_EXTDICT ZSTD_compressBlock_btlazy2_extDict
#else
#define ZSTD_COMPRESSBLOCK_BTLAZY2 NULL
#define ZSTD_COMPRESSBLOCK_BTLAZY2_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_BTLAZY2_EXTDICT NULL
#endif
#if defined (__cplusplus)
}

10
zstd/compress/zstd_ldm.c
View File

@ -246,7 +246,11 @@ static size_t ZSTD_ldm_fillFastTables(ZSTD_matchState_t* ms,
break;
case ZSTD_dfast:
#ifndef ZSTD_EXCLUDE_DFAST_BLOCK_COMPRESSOR
ZSTD_fillDoubleHashTable(ms, iend, ZSTD_dtlm_fast, ZSTD_tfp_forCCtx);
#else
assert(0); /* shouldn't be called: cparams should've been adjusted. */
#endif
break;
case ZSTD_greedy:
@ -318,7 +322,9 @@ static void ZSTD_ldm_limitTableUpdate(ZSTD_matchState_t* ms, const BYTE* anchor)
}
}
static size_t ZSTD_ldm_generateSequences_internal(
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_ldm_generateSequences_internal(
ldmState_t* ldmState, rawSeqStore_t* rawSeqStore,
ldmParams_t const* params, void const* src, size_t srcSize)
{
@ -689,7 +695,6 @@ size_t ZSTD_ldm_blockCompress(rawSeqStore_t* rawSeqStore,
/* maybeSplitSequence updates rawSeqStore->pos */
rawSeq const sequence = maybeSplitSequence(rawSeqStore,
(U32)(iend - ip), minMatch);
int i;
/* End signal */
if (sequence.offset == 0)
break;
@ -702,6 +707,7 @@ size_t ZSTD_ldm_blockCompress(rawSeqStore_t* rawSeqStore,
/* Run the block compressor */
DEBUGLOG(5, "pos %u : calling block compressor on segment of size %u", (unsigned)(ip-istart), sequence.litLength);
{
int i;
size_t const newLitLength =
blockCompressor(ms, seqStore, rep, ip, sequence.litLength);
ip += sequence.litLength;

320
zstd/compress/zstd_opt.c
View File

@ -12,6 +12,9 @@
#include "hist.h"
#include "zstd_opt.h"
#if !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR)
#define ZSTD_LITFREQ_ADD 2 /* scaling factor for litFreq, so that frequencies adapt faster to new stats */
#define ZSTD_MAX_PRICE (1<<30)
@ -264,6 +267,7 @@ static U32 ZSTD_rawLiteralsCost(const BYTE* const literals, U32 const litLength,
const optState_t* const optPtr,
int optLevel)
{
DEBUGLOG(8, "ZSTD_rawLiteralsCost (%u literals)", litLength);
if (litLength == 0) return 0;
if (!ZSTD_compressedLiterals(optPtr))
@ -402,7 +406,9 @@ MEM_STATIC U32 ZSTD_readMINMATCH(const void* memPtr, U32 length)
/* Update hashTable3 up to ip (excluded)
Assumption : always within prefix (i.e. not within extDict) */
static U32 ZSTD_insertAndFindFirstIndexHash3 (const ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_insertAndFindFirstIndexHash3 (const ZSTD_matchState_t* ms,
U32* nextToUpdate3,
const BYTE* const ip)
{
@ -431,7 +437,9 @@ static U32 ZSTD_insertAndFindFirstIndexHash3 (const ZSTD_matchState_t* ms,
* @param ip assumed <= iend-8 .
* @param target The target of ZSTD_updateTree_internal() - we are filling to this position
* @return : nb of positions added */
static U32 ZSTD_insertBt1(
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_insertBt1(
const ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iend,
U32 const target,
@ -550,6 +558,7 @@ static U32 ZSTD_insertBt1(
}
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_updateTree_internal(
ZSTD_matchState_t* ms,
const BYTE* const ip, const BYTE* const iend,
@ -558,7 +567,7 @@ void ZSTD_updateTree_internal(
const BYTE* const base = ms->window.base;
U32 const target = (U32)(ip - base);
U32 idx = ms->nextToUpdate;
DEBUGLOG(6, "ZSTD_updateTree_internal, from %u to %u (dictMode:%u)",
DEBUGLOG(7, "ZSTD_updateTree_internal, from %u to %u (dictMode:%u)",
idx, target, dictMode);
while(idx < target) {
@ -575,7 +584,9 @@ void ZSTD_updateTree(ZSTD_matchState_t* ms, const BYTE* ip, const BYTE* iend) {
ZSTD_updateTree_internal(ms, ip, iend, ms->cParams.minMatch, ZSTD_noDict);
}
FORCE_INLINE_TEMPLATE U32
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32
ZSTD_insertBtAndGetAllMatches (
ZSTD_match_t* matches, /* store result (found matches) in this table (presumed large enough) */
ZSTD_matchState_t* ms,
@ -816,7 +827,9 @@ typedef U32 (*ZSTD_getAllMatchesFn)(
U32 const ll0,
U32 const lengthToBeat);
FORCE_INLINE_TEMPLATE U32 ZSTD_btGetAllMatches_internal(
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
U32 ZSTD_btGetAllMatches_internal(
ZSTD_match_t* matches,
ZSTD_matchState_t* ms,
U32* nextToUpdate3,
@ -1035,11 +1048,6 @@ ZSTD_optLdm_processMatchCandidate(ZSTD_optLdm_t* optLdm,
* Optimal parser
*********************************/
static U32 ZSTD_totalLen(ZSTD_optimal_t sol)
{
return sol.litlen + sol.mlen;
}
#if 0 /* debug */
static void
@ -1057,7 +1065,13 @@ listStats(const U32* table, int lastEltID)
#endif
FORCE_INLINE_TEMPLATE size_t
#define LIT_PRICE(_p) (int)ZSTD_rawLiteralsCost(_p, 1, optStatePtr, optLevel)
#define LL_PRICE(_l) (int)ZSTD_litLengthPrice(_l, optStatePtr, optLevel)
#define LL_INCPRICE(_l) (LL_PRICE(_l) - LL_PRICE(_l-1))
FORCE_INLINE_TEMPLATE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t
ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
seqStore_t* seqStore,
U32 rep[ZSTD_REP_NUM],
@ -1083,10 +1097,10 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
ZSTD_optimal_t* const opt = optStatePtr->priceTable;
ZSTD_match_t* const matches = optStatePtr->matchTable;
ZSTD_optimal_t lastSequence;
ZSTD_optimal_t lastStretch;
ZSTD_optLdm_t optLdm;
ZSTD_memset(&lastSequence, 0, sizeof(ZSTD_optimal_t));
ZSTD_memset(&lastStretch, 0, sizeof(ZSTD_optimal_t));
optLdm.seqStore = ms->ldmSeqStore ? *ms->ldmSeqStore : kNullRawSeqStore;
optLdm.endPosInBlock = optLdm.startPosInBlock = optLdm.offset = 0;
@ -1109,18 +1123,30 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
U32 nbMatches = getAllMatches(matches, ms, &nextToUpdate3, ip, iend, rep, ll0, minMatch);
ZSTD_optLdm_processMatchCandidate(&optLdm, matches, &nbMatches,
(U32)(ip-istart), (U32)(iend-ip));
if (!nbMatches) { ip++; continue; }
if (!nbMatches) {
DEBUGLOG(8, "no match found at cPos %u", (unsigned)(ip-istart));
ip++;
continue;
}
/* Match found: let's store this solution, and eventually find more candidates.
* During this forward pass, @opt is used to store stretches,
* defined as "a match followed by N literals".
* Note how this is different from a Sequence, which is "N literals followed by a match".
* Storing stretches allows us to store different match predecessors
* for each literal position part of a literals run. */
/* initialize opt[0] */
{ U32 i ; for (i=0; i<ZSTD_REP_NUM; i++) opt[0].rep[i] = rep[i]; }
opt[0].mlen = 0; /* means is_a_literal */
opt[0].mlen = 0; /* there are only literals so far */
opt[0].litlen = litlen;
/* We don't need to include the actual price of the literals because
* it is static for the duration of the forward pass, and is included
* in every price. We include the literal length to avoid negative
* prices when we subtract the previous literal length.
/* No need to include the actual price of the literals before the first match
* because it is static for the duration of the forward pass, and is included
* in every subsequent price. But, we include the literal length because
* the cost variation of litlen depends on the value of litlen.
*/
opt[0].price = (int)ZSTD_litLengthPrice(litlen, optStatePtr, optLevel);
opt[0].price = LL_PRICE(litlen);
ZSTD_STATIC_ASSERT(sizeof(opt[0].rep[0]) == sizeof(rep[0]));
ZSTD_memcpy(&opt[0].rep, rep, sizeof(opt[0].rep));
/* large match -> immediate encoding */
{ U32 const maxML = matches[nbMatches-1].len;
@ -1129,82 +1155,106 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
nbMatches, maxML, maxOffBase, (U32)(ip-prefixStart));
if (maxML > sufficient_len) {
lastSequence.litlen = litlen;
lastSequence.mlen = maxML;
lastSequence.off = maxOffBase;
DEBUGLOG(6, "large match (%u>%u), immediate encoding",
lastStretch.litlen = 0;
lastStretch.mlen = maxML;
lastStretch.off = maxOffBase;
DEBUGLOG(6, "large match (%u>%u) => immediate encoding",
maxML, sufficient_len);
cur = 0;
last_pos = ZSTD_totalLen(lastSequence);
last_pos = maxML;
goto _shortestPath;
} }
/* set prices for first matches starting position == 0 */
assert(opt[0].price >= 0);
{ U32 const literalsPrice = (U32)opt[0].price + ZSTD_litLengthPrice(0, optStatePtr, optLevel);
U32 pos;
{ U32 pos;
U32 matchNb;
for (pos = 1; pos < minMatch; pos++) {
opt[pos].price = ZSTD_MAX_PRICE; /* mlen, litlen and price will be fixed during forward scanning */
opt[pos].price = ZSTD_MAX_PRICE;
opt[pos].mlen = 0;
opt[pos].litlen = litlen + pos;
}
for (matchNb = 0; matchNb < nbMatches; matchNb++) {
U32 const offBase = matches[matchNb].off;
U32 const end = matches[matchNb].len;
for ( ; pos <= end ; pos++ ) {
U32 const matchPrice = ZSTD_getMatchPrice(offBase, pos, optStatePtr, optLevel);
U32 const sequencePrice = literalsPrice + matchPrice;
int const matchPrice = (int)ZSTD_getMatchPrice(offBase, pos, optStatePtr, optLevel);
int const sequencePrice = opt[0].price + matchPrice;
DEBUGLOG(7, "rPos:%u => set initial price : %.2f",
pos, ZSTD_fCost((int)sequencePrice));
pos, ZSTD_fCost(sequencePrice));
opt[pos].mlen = pos;
opt[pos].off = offBase;
opt[pos].litlen = litlen;
opt[pos].price = (int)sequencePrice;
} }
opt[pos].litlen = 0; /* end of match */
opt[pos].price = sequencePrice + LL_PRICE(0);
}
}
last_pos = pos-1;
opt[pos].price = ZSTD_MAX_PRICE;
}
}
/* check further positions */
for (cur = 1; cur <= last_pos; cur++) {
const BYTE* const inr = ip + cur;
assert(cur < ZSTD_OPT_NUM);
DEBUGLOG(7, "cPos:%zi==rPos:%u", inr-istart, cur)
assert(cur <= ZSTD_OPT_NUM);
DEBUGLOG(7, "cPos:%zi==rPos:%u", inr-istart, cur);
/* Fix current position with one literal if cheaper */
{ U32 const litlen = (opt[cur-1].mlen == 0) ? opt[cur-1].litlen + 1 : 1;
{ U32 const litlen = opt[cur-1].litlen + 1;
int const price = opt[cur-1].price
+ (int)ZSTD_rawLiteralsCost(ip+cur-1, 1, optStatePtr, optLevel)
+ (int)ZSTD_litLengthPrice(litlen, optStatePtr, optLevel)
- (int)ZSTD_litLengthPrice(litlen-1, optStatePtr, optLevel);
+ LIT_PRICE(ip+cur-1)
+ LL_INCPRICE(litlen);
assert(price < 1000000000); /* overflow check */
if (price <= opt[cur].price) {
ZSTD_optimal_t const prevMatch = opt[cur];
DEBUGLOG(7, "cPos:%zi==rPos:%u : better price (%.2f<=%.2f) using literal (ll==%u) (hist:%u,%u,%u)",
inr-istart, cur, ZSTD_fCost(price), ZSTD_fCost(opt[cur].price), litlen,
opt[cur-1].rep[0], opt[cur-1].rep[1], opt[cur-1].rep[2]);
opt[cur].mlen = 0;
opt[cur].off = 0;
opt[cur] = opt[cur-1];
opt[cur].litlen = litlen;
opt[cur].price = price;
if ( (optLevel >= 1) /* additional check only for higher modes */
&& (prevMatch.litlen == 0) /* replace a match */
&& (LL_INCPRICE(1) < 0) /* ll1 is cheaper than ll0 */
&& LIKELY(ip + cur < iend)
) {
/* check next position, in case it would be cheaper */
int with1literal = prevMatch.price + LIT_PRICE(ip+cur) + LL_INCPRICE(1);
int withMoreLiterals = price + LIT_PRICE(ip+cur) + LL_INCPRICE(litlen+1);
DEBUGLOG(7, "then at next rPos %u : match+1lit %.2f vs %ulits %.2f",
cur+1, ZSTD_fCost(with1literal), litlen+1, ZSTD_fCost(withMoreLiterals));
if ( (with1literal < withMoreLiterals)
&& (with1literal < opt[cur+1].price) ) {
/* update offset history - before it disappears */
U32 const prev = cur - prevMatch.mlen;
repcodes_t const newReps = ZSTD_newRep(opt[prev].rep, prevMatch.off, opt[prev].litlen==0);
assert(cur >= prevMatch.mlen);
DEBUGLOG(7, "==> match+1lit is cheaper (%.2f < %.2f) (hist:%u,%u,%u) !",
ZSTD_fCost(with1literal), ZSTD_fCost(withMoreLiterals),
newReps.rep[0], newReps.rep[1], newReps.rep[2] );
opt[cur+1] = prevMatch; /* mlen & offbase */
ZSTD_memcpy(opt[cur+1].rep, &newReps, sizeof(repcodes_t));
opt[cur+1].litlen = 1;
opt[cur+1].price = with1literal;
if (last_pos < cur+1) last_pos = cur+1;
}
}
} else {
DEBUGLOG(7, "cPos:%zi==rPos:%u : literal would cost more (%.2f>%.2f) (hist:%u,%u,%u)",
inr-istart, cur, ZSTD_fCost(price), ZSTD_fCost(opt[cur].price),
opt[cur].rep[0], opt[cur].rep[1], opt[cur].rep[2]);
DEBUGLOG(7, "cPos:%zi==rPos:%u : literal would cost more (%.2f>%.2f)",
inr-istart, cur, ZSTD_fCost(price), ZSTD_fCost(opt[cur].price));
}
}
/* Set the repcodes of the current position. We must do it here
* because we rely on the repcodes of the 2nd to last sequence being
* correct to set the next chunks repcodes during the backward
* traversal.
/* Offset history is not updated during match comparison.
* Do it here, now that the match is selected and confirmed.
*/
ZSTD_STATIC_ASSERT(sizeof(opt[cur].rep) == sizeof(repcodes_t));
assert(cur >= opt[cur].mlen);
if (opt[cur].mlen != 0) {
if (opt[cur].litlen == 0) {
/* just finished a match => alter offset history */
U32 const prev = cur - opt[cur].mlen;
repcodes_t const newReps = ZSTD_newRep(opt[prev].rep, opt[cur].off, opt[cur].litlen==0);
repcodes_t const newReps = ZSTD_newRep(opt[prev].rep, opt[cur].off, opt[prev].litlen==0);
ZSTD_memcpy(opt[cur].rep, &newReps, sizeof(repcodes_t));
} else {
ZSTD_memcpy(opt[cur].rep, opt[cur - 1].rep, sizeof(repcodes_t));
}
/* last match must start at a minimum distance of 8 from oend */
@ -1214,15 +1264,14 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
if ( (optLevel==0) /*static_test*/
&& (opt[cur+1].price <= opt[cur].price + (BITCOST_MULTIPLIER/2)) ) {
DEBUGLOG(7, "move to next rPos:%u : price is <=", cur+1);
DEBUGLOG(7, "skip current position : next rPos(%u) price is cheaper", cur+1);
continue; /* skip unpromising positions; about ~+6% speed, -0.01 ratio */
}
assert(opt[cur].price >= 0);
{ U32 const ll0 = (opt[cur].mlen != 0);
U32 const litlen = (opt[cur].mlen == 0) ? opt[cur].litlen : 0;
U32 const previousPrice = (U32)opt[cur].price;
U32 const basePrice = previousPrice + ZSTD_litLengthPrice(0, optStatePtr, optLevel);
{ U32 const ll0 = (opt[cur].litlen == 0);
int const previousPrice = opt[cur].price;
int const basePrice = previousPrice + LL_PRICE(0);
U32 nbMatches = getAllMatches(matches, ms, &nextToUpdate3, inr, iend, opt[cur].rep, ll0, minMatch);
U32 matchNb;
@ -1234,18 +1283,17 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
continue;
}
{ U32 const maxML = matches[nbMatches-1].len;
DEBUGLOG(7, "cPos:%zi==rPos:%u, found %u matches, of maxLength=%u",
inr-istart, cur, nbMatches, maxML);
{ U32 const longestML = matches[nbMatches-1].len;
DEBUGLOG(7, "cPos:%zi==rPos:%u, found %u matches, of longest ML=%u",
inr-istart, cur, nbMatches, longestML);
if ( (maxML > sufficient_len)
|| (cur + maxML >= ZSTD_OPT_NUM) ) {
lastSequence.mlen = maxML;
lastSequence.off = matches[nbMatches-1].off;
lastSequence.litlen = litlen;
cur -= (opt[cur].mlen==0) ? opt[cur].litlen : 0; /* last sequence is actually only literals, fix cur to last match - note : may underflow, in which case, it's first sequence, and it's okay */
last_pos = cur + ZSTD_totalLen(lastSequence);
if (cur > ZSTD_OPT_NUM) cur = 0; /* underflow => first match */
if ( (longestML > sufficient_len)
|| (cur + longestML >= ZSTD_OPT_NUM)
|| (ip + cur + longestML >= iend) ) {
lastStretch.mlen = longestML;
lastStretch.off = matches[nbMatches-1].off;
lastStretch.litlen = 0;
last_pos = cur + longestML;
goto _shortestPath;
} }
@ -1257,19 +1305,24 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
U32 mlen;
DEBUGLOG(7, "testing match %u => offBase=%4u, mlen=%2u, llen=%2u",
matchNb, matches[matchNb].off, lastML, litlen);
matchNb, matches[matchNb].off, lastML, opt[cur].litlen);
for (mlen = lastML; mlen >= startML; mlen--) { /* scan downward */
U32 const pos = cur + mlen;
int const price = (int)basePrice + (int)ZSTD_getMatchPrice(offset, mlen, optStatePtr, optLevel);
int const price = basePrice + (int)ZSTD_getMatchPrice(offset, mlen, optStatePtr, optLevel);
if ((pos > last_pos) || (price < opt[pos].price)) {
DEBUGLOG(7, "rPos:%u (ml=%2u) => new better price (%.2f<%.2f)",
pos, mlen, ZSTD_fCost(price), ZSTD_fCost(opt[pos].price));
while (last_pos < pos) { opt[last_pos+1].price = ZSTD_MAX_PRICE; last_pos++; } /* fill empty positions */
while (last_pos < pos) {
/* fill empty positions, for future comparisons */
last_pos++;
opt[last_pos].price = ZSTD_MAX_PRICE;
opt[last_pos].litlen = !0; /* just needs to be != 0, to mean "not an end of match" */
}
opt[pos].mlen = mlen;
opt[pos].off = offset;
opt[pos].litlen = litlen;
opt[pos].litlen = 0;
opt[pos].price = price;
} else {
DEBUGLOG(7, "rPos:%u (ml=%2u) => new price is worse (%.2f>=%.2f)",
@ -1277,47 +1330,81 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
if (optLevel==0) break; /* early update abort; gets ~+10% speed for about -0.01 ratio loss */
}
} } }
opt[last_pos+1].price = ZSTD_MAX_PRICE;
} /* for (cur = 1; cur <= last_pos; cur++) */
lastSequence = opt[last_pos];
cur = last_pos > ZSTD_totalLen(lastSequence) ? last_pos - ZSTD_totalLen(lastSequence) : 0; /* single sequence, and it starts before `ip` */
assert(cur < ZSTD_OPT_NUM); /* control overflow*/
lastStretch = opt[last_pos];
assert(cur >= lastStretch.mlen);
cur = last_pos - lastStretch.mlen;
_shortestPath: /* cur, last_pos, best_mlen, best_off have to be set */
assert(opt[0].mlen == 0);
assert(last_pos >= lastStretch.mlen);
assert(cur == last_pos - lastStretch.mlen);
/* Set the next chunk's repcodes based on the repcodes of the beginning
* of the last match, and the last sequence. This avoids us having to
* update them while traversing the sequences.
*/
if (lastSequence.mlen != 0) {
repcodes_t const reps = ZSTD_newRep(opt[cur].rep, lastSequence.off, lastSequence.litlen==0);
ZSTD_memcpy(rep, &reps, sizeof(reps));
if (lastStretch.mlen==0) {
/* no solution : all matches have been converted into literals */
assert(lastStretch.litlen == (ip - anchor) + last_pos);
ip += last_pos;
continue;
}
assert(lastStretch.off > 0);
/* Update offset history */
if (lastStretch.litlen == 0) {
/* finishing on a match : update offset history */
repcodes_t const reps = ZSTD_newRep(opt[cur].rep, lastStretch.off, opt[cur].litlen==0);
ZSTD_memcpy(rep, &reps, sizeof(repcodes_t));
} else {
ZSTD_memcpy(rep, opt[cur].rep, sizeof(repcodes_t));
ZSTD_memcpy(rep, lastStretch.rep, sizeof(repcodes_t));
assert(cur >= lastStretch.litlen);
cur -= lastStretch.litlen;
}
{ U32 const storeEnd = cur + 1;
/* Let's write the shortest path solution.
* It is stored in @opt in reverse order,
* starting from @storeEnd (==cur+2),
* effectively partially @opt overwriting.
* Content is changed too:
* - So far, @opt stored stretches, aka a match followed by literals
* - Now, it will store sequences, aka literals followed by a match
*/
{ U32 const storeEnd = cur + 2;
U32 storeStart = storeEnd;
U32 seqPos = cur;
U32 stretchPos = cur;
DEBUGLOG(6, "start reverse traversal (last_pos:%u, cur:%u)",
last_pos, cur); (void)last_pos;
assert(storeEnd < ZSTD_OPT_NUM);
DEBUGLOG(6, "last sequence copied into pos=%u (llen=%u,mlen=%u,ofc=%u)",
storeEnd, lastSequence.litlen, lastSequence.mlen, lastSequence.off);
opt[storeEnd] = lastSequence;
while (seqPos > 0) {
U32 const backDist = ZSTD_totalLen(opt[seqPos]);
assert(storeEnd < ZSTD_OPT_SIZE);
DEBUGLOG(6, "last stretch copied into pos=%u (llen=%u,mlen=%u,ofc=%u)",
storeEnd, lastStretch.litlen, lastStretch.mlen, lastStretch.off);
if (lastStretch.litlen > 0) {
/* last "sequence" is unfinished: just a bunch of literals */
opt[storeEnd].litlen = lastStretch.litlen;
opt[storeEnd].mlen = 0;
storeStart = storeEnd-1;
opt[storeStart] = lastStretch;
} {
opt[storeEnd] = lastStretch; /* note: litlen will be fixed */
storeStart = storeEnd;
}
while (1) {
ZSTD_optimal_t nextStretch = opt[stretchPos];
opt[storeStart].litlen = nextStretch.litlen;
DEBUGLOG(6, "selected sequence (llen=%u,mlen=%u,ofc=%u)",
opt[storeStart].litlen, opt[storeStart].mlen, opt[storeStart].off);
if (nextStretch.mlen == 0) {
/* reaching beginning of segment */
break;
}
storeStart--;
DEBUGLOG(6, "sequence from rPos=%u copied into pos=%u (llen=%u,mlen=%u,ofc=%u)",
seqPos, storeStart, opt[seqPos].litlen, opt[seqPos].mlen, opt[seqPos].off);
opt[storeStart] = opt[seqPos];
seqPos = (seqPos > backDist) ? seqPos - backDist : 0;
opt[storeStart] = nextStretch; /* note: litlen will be fixed */
assert(nextStretch.litlen + nextStretch.mlen <= stretchPos);
stretchPos -= nextStretch.litlen + nextStretch.mlen;
}
/* save sequences */
DEBUGLOG(6, "sending selected sequences into seqStore")
DEBUGLOG(6, "sending selected sequences into seqStore");
{ U32 storePos;
for (storePos=storeStart; storePos <= storeEnd; storePos++) {
U32 const llen = opt[storePos].litlen;
@ -1339,6 +1426,9 @@ _shortestPath: /* cur, last_pos, best_mlen, best_off have to be set */
anchor += advance;
ip = anchor;
} }
DEBUGLOG(7, "new offset history : %u, %u, %u", rep[0], rep[1], rep[2]);
/* update all costs */
ZSTD_setBasePrices(optStatePtr, optLevel);
}
} /* while (ip < ilimit) */
@ -1346,21 +1436,27 @@ _shortestPath: /* cur, last_pos, best_mlen, best_off have to be set */
/* Return the last literals size */
return (size_t)(iend - anchor);
}
#endif /* build exclusions */
#ifndef ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR
static size_t ZSTD_compressBlock_opt0(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize, const ZSTD_dictMode_e dictMode)
{
return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 0 /* optLevel */, dictMode);
}
#endif
#ifndef ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
static size_t ZSTD_compressBlock_opt2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize, const ZSTD_dictMode_e dictMode)
{
return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, src, srcSize, 2 /* optLevel */, dictMode);
}
#endif
#ifndef ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btopt(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize)
@ -1368,17 +1464,20 @@ size_t ZSTD_compressBlock_btopt(
DEBUGLOG(5, "ZSTD_compressBlock_btopt");
return ZSTD_compressBlock_opt0(ms, seqStore, rep, src, srcSize, ZSTD_noDict);
}
#endif
#ifndef ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
/* ZSTD_initStats_ultra():
* make a first compression pass, just to seed stats with more accurate starting values.
* only works on first block, with no dictionary and no ldm.
* this function cannot error out, its narrow contract must be respected.
*/
static void
ZSTD_initStats_ultra(ZSTD_matchState_t* ms,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_initStats_ultra(ZSTD_matchState_t* ms,
seqStore_t* seqStore,
U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize)
@ -1425,7 +1524,7 @@ size_t ZSTD_compressBlock_btultra2(
* Consequently, this can only work if no data has been previously loaded in tables,
* aka, no dictionary, no prefix, no ldm preprocessing.
* The compression ratio gain is generally small (~0.5% on first block),
** the cost is 2x cpu time on first block. */
* the cost is 2x cpu time on first block. */
assert(srcSize <= ZSTD_BLOCKSIZE_MAX);
if ( (ms->opt.litLengthSum==0) /* first block */
&& (seqStore->sequences == seqStore->sequencesStart) /* no ldm */
@ -1438,7 +1537,9 @@ size_t ZSTD_compressBlock_btultra2(
return ZSTD_compressBlock_opt2(ms, seqStore, rep, src, srcSize, ZSTD_noDict);
}
#endif
#ifndef ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btopt_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize)
@ -1446,19 +1547,21 @@ size_t ZSTD_compressBlock_btopt_dictMatchState(
return ZSTD_compressBlock_opt0(ms, seqStore, rep, src, srcSize, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_btultra_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize)
{
return ZSTD_compressBlock_opt2(ms, seqStore, rep, src, srcSize, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_btopt_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize)
{
return ZSTD_compressBlock_opt0(ms, seqStore, rep, src, srcSize, ZSTD_extDict);
}
#endif
#ifndef ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btultra_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
const void* src, size_t srcSize)
{
return ZSTD_compressBlock_opt2(ms, seqStore, rep, src, srcSize, ZSTD_dictMatchState);
}
size_t ZSTD_compressBlock_btultra_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
@ -1466,6 +1569,7 @@ size_t ZSTD_compressBlock_btultra_extDict(
{
return ZSTD_compressBlock_opt2(ms, seqStore, rep, src, srcSize, ZSTD_extDict);
}
#endif
/* note : no btultra2 variant for extDict nor dictMatchState,
* because btultra2 is not meant to work with dictionaries

44
zstd/compress/zstd_opt.h
View File

@ -17,28 +17,38 @@ extern "C" {
#include "zstd_compress_internal.h"
#if !defined(ZSTD_EXCLUDE_BTLAZY2_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR) \
|| !defined(ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR)
/* used in ZSTD_loadDictionaryContent() */
void ZSTD_updateTree(ZSTD_matchState_t* ms, const BYTE* ip, const BYTE* iend);
#endif
#ifndef ZSTD_EXCLUDE_BTOPT_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btopt(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btultra(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btultra2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btopt_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btultra_dictMatchState(
size_t ZSTD_compressBlock_btopt_extDict(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btopt_extDict(
#define ZSTD_COMPRESSBLOCK_BTOPT ZSTD_compressBlock_btopt
#define ZSTD_COMPRESSBLOCK_BTOPT_DICTMATCHSTATE ZSTD_compressBlock_btopt_dictMatchState
#define ZSTD_COMPRESSBLOCK_BTOPT_EXTDICT ZSTD_compressBlock_btopt_extDict
#else
#define ZSTD_COMPRESSBLOCK_BTOPT NULL
#define ZSTD_COMPRESSBLOCK_BTOPT_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_BTOPT_EXTDICT NULL
#endif
#ifndef ZSTD_EXCLUDE_BTULTRA_BLOCK_COMPRESSOR
size_t ZSTD_compressBlock_btultra(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btultra_dictMatchState(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
size_t ZSTD_compressBlock_btultra_extDict(
@ -48,6 +58,20 @@ size_t ZSTD_compressBlock_btultra_extDict(
/* note : no btultra2 variant for extDict nor dictMatchState,
* because btultra2 is not meant to work with dictionaries
* and is only specific for the first block (no prefix) */
size_t ZSTD_compressBlock_btultra2(
ZSTD_matchState_t* ms, seqStore_t* seqStore, U32 rep[ZSTD_REP_NUM],
void const* src, size_t srcSize);
#define ZSTD_COMPRESSBLOCK_BTULTRA ZSTD_compressBlock_btultra
#define ZSTD_COMPRESSBLOCK_BTULTRA_DICTMATCHSTATE ZSTD_compressBlock_btultra_dictMatchState
#define ZSTD_COMPRESSBLOCK_BTULTRA_EXTDICT ZSTD_compressBlock_btultra_extDict
#define ZSTD_COMPRESSBLOCK_BTULTRA2 ZSTD_compressBlock_btultra2
#else
#define ZSTD_COMPRESSBLOCK_BTULTRA NULL
#define ZSTD_COMPRESSBLOCK_BTULTRA_DICTMATCHSTATE NULL
#define ZSTD_COMPRESSBLOCK_BTULTRA_EXTDICT NULL
#define ZSTD_COMPRESSBLOCK_BTULTRA2 NULL
#endif
#if defined (__cplusplus)
}

131
zstd/compress/zstdmt_compress.c
View File

@ -15,10 +15,6 @@
#endif
/* ====== Constants ====== */
#define ZSTDMT_OVERLAPLOG_DEFAULT 0
/* ====== Dependencies ====== */
#include "../common/allocations.h" /* ZSTD_customMalloc, ZSTD_customCalloc, ZSTD_customFree */
#include "../common/zstd_deps.h" /* ZSTD_memcpy, ZSTD_memset, INT_MAX, UINT_MAX */
@ -44,12 +40,13 @@
# include <unistd.h>
# include <sys/times.h>
# define DEBUG_PRINTHEX(l,p,n) { \
# define DEBUG_PRINTHEX(l,p,n) \
do { \
unsigned debug_u; \
for (debug_u=0; debug_u<(n); debug_u++) \
RAWLOG(l, "%02X ", ((const unsigned char*)(p))[debug_u]); \
RAWLOG(l, " \n"); \
}
} while (0)
static unsigned long long GetCurrentClockTimeMicroseconds(void)
{
@ -61,25 +58,28 @@ static unsigned long long GetCurrentClockTimeMicroseconds(void)
} }
#define MUTEX_WAIT_TIME_DLEVEL 6
#define ZSTD_PTHREAD_MUTEX_LOCK(mutex) { \
#define ZSTD_PTHREAD_MUTEX_LOCK(mutex) \
do { \
if (DEBUGLEVEL >= MUTEX_WAIT_TIME_DLEVEL) { \
unsigned long long const beforeTime = GetCurrentClockTimeMicroseconds(); \
ZSTD_pthread_mutex_lock(mutex); \
{ unsigned long long const afterTime = GetCurrentClockTimeMicroseconds(); \
unsigned long long const elapsedTime = (afterTime-beforeTime); \
if (elapsedTime > 1000) { /* or whatever threshold you like; I'm using 1 millisecond here */ \
DEBUGLOG(MUTEX_WAIT_TIME_DLEVEL, "Thread took %llu microseconds to acquire mutex %s \n", \
if (elapsedTime > 1000) { \
/* or whatever threshold you like; I'm using 1 millisecond here */ \
DEBUGLOG(MUTEX_WAIT_TIME_DLEVEL, \
"Thread took %llu microseconds to acquire mutex %s \n", \
elapsedTime, #mutex); \
} } \
} else { \
ZSTD_pthread_mutex_lock(mutex); \
} \
}
} while (0)
#else
# define ZSTD_PTHREAD_MUTEX_LOCK(m) ZSTD_pthread_mutex_lock(m)
# define DEBUG_PRINTHEX(l,p,n) {}
# define DEBUG_PRINTHEX(l,p,n) do { } while (0)
#endif
@ -100,18 +100,39 @@ typedef struct ZSTDMT_bufferPool_s {
unsigned totalBuffers;
unsigned nbBuffers;
ZSTD_customMem cMem;
buffer_t bTable[1]; /* variable size */
buffer_t* buffers;
} ZSTDMT_bufferPool;
static void ZSTDMT_freeBufferPool(ZSTDMT_bufferPool* bufPool)
{
DEBUGLOG(3, "ZSTDMT_freeBufferPool (address:%08X)", (U32)(size_t)bufPool);
if (!bufPool) return; /* compatibility with free on NULL */
if (bufPool->buffers) {
unsigned u;
for (u=0; u<bufPool->totalBuffers; u++) {
DEBUGLOG(4, "free buffer %2u (address:%08X)", u, (U32)(size_t)bufPool->buffers[u].start);
ZSTD_customFree(bufPool->buffers[u].start, bufPool->cMem);
}
ZSTD_customFree(bufPool->buffers, bufPool->cMem);
}
ZSTD_pthread_mutex_destroy(&bufPool->poolMutex);
ZSTD_customFree(bufPool, bufPool->cMem);
}
static ZSTDMT_bufferPool* ZSTDMT_createBufferPool(unsigned maxNbBuffers, ZSTD_customMem cMem)
{
ZSTDMT_bufferPool* const bufPool = (ZSTDMT_bufferPool*)ZSTD_customCalloc(
sizeof(ZSTDMT_bufferPool) + (maxNbBuffers-1) * sizeof(buffer_t), cMem);
ZSTDMT_bufferPool* const bufPool =
(ZSTDMT_bufferPool*)ZSTD_customCalloc(sizeof(ZSTDMT_bufferPool), cMem);
if (bufPool==NULL) return NULL;
if (ZSTD_pthread_mutex_init(&bufPool->poolMutex, NULL)) {
ZSTD_customFree(bufPool, cMem);
return NULL;
}
bufPool->buffers = (buffer_t*)ZSTD_customCalloc(maxNbBuffers * sizeof(buffer_t), cMem);
if (bufPool->buffers==NULL) {
ZSTDMT_freeBufferPool(bufPool);
return NULL;
}
bufPool->bufferSize = 64 KB;
bufPool->totalBuffers = maxNbBuffers;
bufPool->nbBuffers = 0;
@ -119,32 +140,19 @@ static ZSTDMT_bufferPool* ZSTDMT_createBufferPool(unsigned maxNbBuffers, ZSTD_cu
return bufPool;
}
static void ZSTDMT_freeBufferPool(ZSTDMT_bufferPool* bufPool)
{
unsigned u;
DEBUGLOG(3, "ZSTDMT_freeBufferPool (address:%08X)", (U32)(size_t)bufPool);
if (!bufPool) return; /* compatibility with free on NULL */
for (u=0; u<bufPool->totalBuffers; u++) {
DEBUGLOG(4, "free buffer %2u (address:%08X)", u, (U32)(size_t)bufPool->bTable[u].start);
ZSTD_customFree(bufPool->bTable[u].start, bufPool->cMem);
}
ZSTD_pthread_mutex_destroy(&bufPool->poolMutex);
ZSTD_customFree(bufPool, bufPool->cMem);
}
/* only works at initialization, not during compression */
static size_t ZSTDMT_sizeof_bufferPool(ZSTDMT_bufferPool* bufPool)
{
size_t const poolSize = sizeof(*bufPool)
+ (bufPool->totalBuffers - 1) * sizeof(buffer_t);
size_t const poolSize = sizeof(*bufPool);
size_t const arraySize = bufPool->totalBuffers * sizeof(buffer_t);
unsigned u;
size_t totalBufferSize = 0;
ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
for (u=0; u<bufPool->totalBuffers; u++)
totalBufferSize += bufPool->bTable[u].capacity;
totalBufferSize += bufPool->buffers[u].capacity;
ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
return poolSize + totalBufferSize;
return poolSize + arraySize + totalBufferSize;
}
/* ZSTDMT_setBufferSize() :
@ -187,9 +195,9 @@ static buffer_t ZSTDMT_getBuffer(ZSTDMT_bufferPool* bufPool)
DEBUGLOG(5, "ZSTDMT_getBuffer: bSize = %u", (U32)bufPool->bufferSize);
ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
if (bufPool->nbBuffers) { /* try to use an existing buffer */
buffer_t const buf = bufPool->bTable[--(bufPool->nbBuffers)];
buffer_t const buf = bufPool->buffers[--(bufPool->nbBuffers)];
size_t const availBufferSize = buf.capacity;
bufPool->bTable[bufPool->nbBuffers] = g_nullBuffer;
bufPool->buffers[bufPool->nbBuffers] = g_nullBuffer;
if ((availBufferSize >= bSize) & ((availBufferSize>>3) <= bSize)) {
/* large enough, but not too much */
DEBUGLOG(5, "ZSTDMT_getBuffer: provide buffer %u of size %u",
@ -250,14 +258,14 @@ static void ZSTDMT_releaseBuffer(ZSTDMT_bufferPool* bufPool, buffer_t buf)
if (buf.start == NULL) return; /* compatible with release on NULL */
ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
if (bufPool->nbBuffers < bufPool->totalBuffers) {
bufPool->bTable[bufPool->nbBuffers++] = buf; /* stored for later use */
bufPool->buffers[bufPool->nbBuffers++] = buf; /* stored for later use */
DEBUGLOG(5, "ZSTDMT_releaseBuffer: stored buffer of size %u in slot %u",
(U32)buf.capacity, (U32)(bufPool->nbBuffers-1));
ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
return;
}
ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
/* Reached bufferPool capacity (should not happen) */
/* Reached bufferPool capacity (note: should not happen) */
DEBUGLOG(5, "ZSTDMT_releaseBuffer: pool capacity reached => freeing ");
ZSTD_customFree(buf.start, bufPool->cMem);
}
@ -350,16 +358,20 @@ typedef struct {
int totalCCtx;
int availCCtx;
ZSTD_customMem cMem;
ZSTD_CCtx* cctx[1]; /* variable size */
ZSTD_CCtx** cctxs;
} ZSTDMT_CCtxPool;
/* note : all CCtx borrowed from the pool should be released back to the pool _before_ freeing the pool */
/* note : all CCtx borrowed from the pool must be reverted back to the pool _before_ freeing the pool */
static void ZSTDMT_freeCCtxPool(ZSTDMT_CCtxPool* pool)
{
if (!pool) return;
ZSTD_pthread_mutex_destroy(&pool->poolMutex);
if (pool->cctxs) {
int cid;
for (cid=0; cid<pool->totalCCtx; cid++)
ZSTD_freeCCtx(pool->cctx[cid]); /* note : compatible with free on NULL */
ZSTD_pthread_mutex_destroy(&pool->poolMutex);
ZSTD_freeCCtx(pool->cctxs[cid]); /* free compatible with NULL */
ZSTD_customFree(pool->cctxs, pool->cMem);
}
ZSTD_customFree(pool, pool->cMem);
}
@ -368,19 +380,24 @@ static void ZSTDMT_freeCCtxPool(ZSTDMT_CCtxPool* pool)
static ZSTDMT_CCtxPool* ZSTDMT_createCCtxPool(int nbWorkers,
ZSTD_customMem cMem)
{
ZSTDMT_CCtxPool* const cctxPool = (ZSTDMT_CCtxPool*) ZSTD_customCalloc(
sizeof(ZSTDMT_CCtxPool) + (nbWorkers-1)*sizeof(ZSTD_CCtx*), cMem);
ZSTDMT_CCtxPool* const cctxPool =
(ZSTDMT_CCtxPool*) ZSTD_customCalloc(sizeof(ZSTDMT_CCtxPool), cMem);
assert(nbWorkers > 0);
if (!cctxPool) return NULL;
if (ZSTD_pthread_mutex_init(&cctxPool->poolMutex, NULL)) {
ZSTD_customFree(cctxPool, cMem);
return NULL;
}
cctxPool->cMem = cMem;
cctxPool->totalCCtx = nbWorkers;
cctxPool->cctxs = (ZSTD_CCtx**)ZSTD_customCalloc(nbWorkers * sizeof(ZSTD_CCtx*), cMem);
if (!cctxPool->cctxs) {
ZSTDMT_freeCCtxPool(cctxPool);
return NULL;
}
cctxPool->cMem = cMem;
cctxPool->cctxs[0] = ZSTD_createCCtx_advanced(cMem);
if (!cctxPool->cctxs[0]) { ZSTDMT_freeCCtxPool(cctxPool); return NULL; }
cctxPool->availCCtx = 1; /* at least one cctx for single-thread mode */
cctxPool->cctx[0] = ZSTD_createCCtx_advanced(cMem);
if (!cctxPool->cctx[0]) { ZSTDMT_freeCCtxPool(cctxPool); return NULL; }
DEBUGLOG(3, "cctxPool created, with %u workers", nbWorkers);
return cctxPool;
}
@ -402,16 +419,16 @@ static size_t ZSTDMT_sizeof_CCtxPool(ZSTDMT_CCtxPool* cctxPool)
{
ZSTD_pthread_mutex_lock(&cctxPool->poolMutex);
{ unsigned const nbWorkers = cctxPool->totalCCtx;
size_t const poolSize = sizeof(*cctxPool)
+ (nbWorkers-1) * sizeof(ZSTD_CCtx*);
unsigned u;
size_t const poolSize = sizeof(*cctxPool);
size_t const arraySize = cctxPool->totalCCtx * sizeof(ZSTD_CCtx*);
size_t totalCCtxSize = 0;
unsigned u;
for (u=0; u<nbWorkers; u++) {
totalCCtxSize += ZSTD_sizeof_CCtx(cctxPool->cctx[u]);
totalCCtxSize += ZSTD_sizeof_CCtx(cctxPool->cctxs[u]);
}
ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex);
assert(nbWorkers > 0);
return poolSize + totalCCtxSize;
return poolSize + arraySize + totalCCtxSize;
}
}
@ -421,7 +438,7 @@ static ZSTD_CCtx* ZSTDMT_getCCtx(ZSTDMT_CCtxPool* cctxPool)
ZSTD_pthread_mutex_lock(&cctxPool->poolMutex);
if (cctxPool->availCCtx) {
cctxPool->availCCtx--;
{ ZSTD_CCtx* const cctx = cctxPool->cctx[cctxPool->availCCtx];
{ ZSTD_CCtx* const cctx = cctxPool->cctxs[cctxPool->availCCtx];
ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex);
return cctx;
} }
@ -435,7 +452,7 @@ static void ZSTDMT_releaseCCtx(ZSTDMT_CCtxPool* pool, ZSTD_CCtx* cctx)
if (cctx==NULL) return; /* compatibility with release on NULL */
ZSTD_pthread_mutex_lock(&pool->poolMutex);
if (pool->availCCtx < pool->totalCCtx)
pool->cctx[pool->availCCtx++] = cctx;
pool->cctxs[pool->availCCtx++] = cctx;
else {
/* pool overflow : should not happen, since totalCCtx==nbWorkers */
DEBUGLOG(4, "CCtx pool overflow : free cctx");
@ -601,11 +618,8 @@ static void ZSTDMT_serialState_update(serialState_t* serialState,
ZSTD_pthread_mutex_unlock(&serialState->mutex);
if (seqStore.size > 0) {
size_t const err = ZSTD_referenceExternalSequences(
jobCCtx, seqStore.seq, seqStore.size);
ZSTD_referenceExternalSequences(jobCCtx, seqStore.seq, seqStore.size);
assert(serialState->params.ldmParams.enableLdm == ZSTD_ps_enable);
assert(!ZSTD_isError(err));
(void)err;
}
}
@ -657,12 +671,13 @@ typedef struct {
unsigned frameChecksumNeeded; /* used only by mtctx */
} ZSTDMT_jobDescription;
#define JOB_ERROR(e) { \
#define JOB_ERROR(e) \
do { \
ZSTD_PTHREAD_MUTEX_LOCK(&job->job_mutex); \
job->cSize = e; \
ZSTD_pthread_mutex_unlock(&job->job_mutex); \
goto _endJob; \
}
} while (0)
/* ZSTDMT_compressionJob() is a POOL_function type */
static void ZSTDMT_compressionJob(void* jobDescription)
@ -1091,7 +1106,7 @@ ZSTD_frameProgression ZSTDMT_getFrameProgression(ZSTDMT_CCtx* mtctx)
{ unsigned jobNb;
unsigned lastJobNb = mtctx->nextJobID + mtctx->jobReady; assert(mtctx->jobReady <= 1);
DEBUGLOG(6, "ZSTDMT_getFrameProgression: jobs: from %u to <%u (jobReady:%u)",
mtctx->doneJobID, lastJobNb, mtctx->jobReady)
mtctx->doneJobID, lastJobNb, mtctx->jobReady);
for (jobNb = mtctx->doneJobID ; jobNb < lastJobNb ; jobNb++) {
unsigned const wJobID = jobNb & mtctx->jobIDMask;
ZSTDMT_jobDescription* jobPtr = &mtctx->jobs[wJobID];

292
zstd/decompress/huf_decompress.c
View File

@ -34,6 +34,12 @@
* Macros
****************************************************************/
#ifdef HUF_DISABLE_FAST_DECODE
# define HUF_ENABLE_FAST_DECODE 0
#else
# define HUF_ENABLE_FAST_DECODE 1
#endif
/* These two optional macros force the use one way or another of the two
* Huffman decompression implementations. You can't force in both directions
* at the same time.
@ -158,17 +164,18 @@ static size_t HUF_initFastDStream(BYTE const* ip) {
* op [in/out] - The output pointers, must be updated to reflect what is written.
* bits [in/out] - The bitstream containers, must be updated to reflect the current state.
* dt [in] - The decoding table.
* ilimit [in] - The input limit, stop when any input pointer is below ilimit.
* ilowest [in] - The beginning of the valid range of the input. Decoders may read
* down to this pointer. It may be below iend[0].
* oend [in] - The end of the output stream. op[3] must not cross oend.
* iend [in] - The end of each input stream. ip[i] may cross iend[i],
* as long as it is above ilimit, but that indicates corruption.
* as long as it is above ilowest, but that indicates corruption.
*/
typedef struct {
BYTE const* ip[4];
BYTE* op[4];
U64 bits[4];
void const* dt;
BYTE const* ilimit;
BYTE const* ilowest;
BYTE* oend;
BYTE const* iend[4];
} HUF_DecompressFastArgs;
@ -186,9 +193,9 @@ static size_t HUF_DecompressFastArgs_init(HUF_DecompressFastArgs* args, void* ds
void const* dt = DTable + 1;
U32 const dtLog = HUF_getDTableDesc(DTable).tableLog;
const BYTE* const ilimit = (const BYTE*)src + 6 + 8;
const BYTE* const istart = (const BYTE*)src;
BYTE* const oend = (BYTE*)dst + dstSize;
BYTE* const oend = ZSTD_maybeNullPtrAdd((BYTE*)dst, dstSize);
/* The fast decoding loop assumes 64-bit little-endian.
* This condition is false on x32.
@ -196,6 +203,11 @@ static size_t HUF_DecompressFastArgs_init(HUF_DecompressFastArgs* args, void* ds
if (!MEM_isLittleEndian() || MEM_32bits())
return 0;
/* Avoid nullptr addition */
if (dstSize == 0)
return 0;
assert(dst != NULL);
/* strict minimum : jump table + 1 byte per stream */
if (srcSize < 10)
return ERROR(corruption_detected);
@ -209,7 +221,6 @@ static size_t HUF_DecompressFastArgs_init(HUF_DecompressFastArgs* args, void* ds
/* Read the jump table. */
{
const BYTE* const istart = (const BYTE*)src;
size_t const length1 = MEM_readLE16(istart);
size_t const length2 = MEM_readLE16(istart+2);
size_t const length3 = MEM_readLE16(istart+4);
@ -221,10 +232,8 @@ static size_t HUF_DecompressFastArgs_init(HUF_DecompressFastArgs* args, void* ds
/* HUF_initFastDStream() requires this, and this small of an input
* won't benefit from the ASM loop anyways.
* length1 must be >= 16 so that ip[0] >= ilimit before the loop
* starts.
*/
if (length1 < 16 || length2 < 8 || length3 < 8 || length4 < 8)
if (length1 < 8 || length2 < 8 || length3 < 8 || length4 < 8)
return 0;
if (length4 > srcSize) return ERROR(corruption_detected); /* overflow */
}
@ -256,11 +265,12 @@ static size_t HUF_DecompressFastArgs_init(HUF_DecompressFastArgs* args, void* ds
args->bits[2] = HUF_initFastDStream(args->ip[2]);
args->bits[3] = HUF_initFastDStream(args->ip[3]);
/* If ip[] >= ilimit, it is guaranteed to be safe to
* reload bits[]. It may be beyond its section, but is
* guaranteed to be valid (>= istart).
/* The decoders must be sure to never read beyond ilowest.
* This is lower than iend[0], but allowing decoders to read
* down to ilowest can allow an extra iteration or two in the
* fast loop.
*/
args->ilimit = ilimit;
args->ilowest = istart;
args->oend = oend;
args->dt = dt;
@ -285,13 +295,31 @@ static size_t HUF_initRemainingDStream(BIT_DStream_t* bit, HUF_DecompressFastArg
assert(sizeof(size_t) == 8);
bit->bitContainer = MEM_readLEST(args->ip[stream]);
bit->bitsConsumed = ZSTD_countTrailingZeros64(args->bits[stream]);
bit->start = (const char*)args->iend[0];
bit->start = (const char*)args->ilowest;
bit->limitPtr = bit->start + sizeof(size_t);
bit->ptr = (const char*)args->ip[stream];
return 0;
}
/* Calls X(N) for each stream 0, 1, 2, 3. */
#define HUF_4X_FOR_EACH_STREAM(X) \
do { \
X(0); \
X(1); \
X(2); \
X(3); \
} while (0)
/* Calls X(N, var) for each stream 0, 1, 2, 3. */
#define HUF_4X_FOR_EACH_STREAM_WITH_VAR(X, var) \
do { \
X(0, (var)); \
X(1, (var)); \
X(2, (var)); \
X(3, (var)); \
} while (0)
#ifndef HUF_FORCE_DECOMPRESS_X2
@ -500,15 +528,19 @@ HUF_decodeSymbolX1(BIT_DStream_t* Dstream, const HUF_DEltX1* dt, const U32 dtLog
}
#define HUF_DECODE_SYMBOLX1_0(ptr, DStreamPtr) \
*ptr++ = HUF_decodeSymbolX1(DStreamPtr, dt, dtLog)
do { *ptr++ = HUF_decodeSymbolX1(DStreamPtr, dt, dtLog); } while (0)
#define HUF_DECODE_SYMBOLX1_1(ptr, DStreamPtr) \
do { \
if (MEM_64bits() || (HUF_TABLELOG_MAX<=12)) \
HUF_DECODE_SYMBOLX1_0(ptr, DStreamPtr)
HUF_DECODE_SYMBOLX1_0(ptr, DStreamPtr); \
} while (0)
#define HUF_DECODE_SYMBOLX1_2(ptr, DStreamPtr) \
do { \
if (MEM_64bits()) \
HUF_DECODE_SYMBOLX1_0(ptr, DStreamPtr)
HUF_DECODE_SYMBOLX1_0(ptr, DStreamPtr); \
} while (0)
HINT_INLINE size_t
HUF_decodeStreamX1(BYTE* p, BIT_DStream_t* const bitDPtr, BYTE* const pEnd, const HUF_DEltX1* const dt, const U32 dtLog)
@ -546,7 +578,7 @@ HUF_decompress1X1_usingDTable_internal_body(
const HUF_DTable* DTable)
{
BYTE* op = (BYTE*)dst;
BYTE* const oend = op + dstSize;
BYTE* const oend = ZSTD_maybeNullPtrAdd(op, dstSize);
const void* dtPtr = DTable + 1;
const HUF_DEltX1* const dt = (const HUF_DEltX1*)dtPtr;
BIT_DStream_t bitD;
@ -574,6 +606,7 @@ HUF_decompress4X1_usingDTable_internal_body(
{
/* Check */
if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
if (dstSize < 6) return ERROR(corruption_detected); /* stream 4-split doesn't work */
{ const BYTE* const istart = (const BYTE*) cSrc;
BYTE* const ostart = (BYTE*) dst;
@ -609,7 +642,7 @@ HUF_decompress4X1_usingDTable_internal_body(
if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
if (opStart4 > oend) return ERROR(corruption_detected); /* overflow */
if (dstSize < 6) return ERROR(corruption_detected); /* stream 4-split doesn't work */
assert(dstSize >= 6); /* validated above */
CHECK_F( BIT_initDStream(&bitD1, istart1, length1) );
CHECK_F( BIT_initDStream(&bitD2, istart2, length2) );
CHECK_F( BIT_initDStream(&bitD3, istart3, length3) );
@ -692,7 +725,7 @@ void HUF_decompress4X1_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
BYTE* op[4];
U16 const* const dtable = (U16 const*)args->dt;
BYTE* const oend = args->oend;
BYTE const* const ilimit = args->ilimit;
BYTE const* const ilowest = args->ilowest;
/* Copy the arguments to local variables */
ZSTD_memcpy(&bits, &args->bits, sizeof(bits));
@ -705,13 +738,12 @@ void HUF_decompress4X1_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
for (;;) {
BYTE* olimit;
int stream;
int symbol;
/* Assert loop preconditions */
#ifndef NDEBUG
for (stream = 0; stream < 4; ++stream) {
assert(op[stream] <= (stream == 3 ? oend : op[stream + 1]));
assert(ip[stream] >= ilimit);
assert(ip[stream] >= ilowest);
}
#endif
/* Compute olimit */
@ -721,7 +753,7 @@ void HUF_decompress4X1_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
/* Each iteration consumes up to 11 bits * 5 = 55 bits < 7 bytes
* per stream.
*/
size_t const iiters = (size_t)(ip[0] - ilimit) / 7;
size_t const iiters = (size_t)(ip[0] - ilowest) / 7;
/* We can safely run iters iterations before running bounds checks */
size_t const iters = MIN(oiters, iiters);
size_t const symbols = iters * 5;
@ -732,8 +764,8 @@ void HUF_decompress4X1_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
*/
olimit = op[3] + symbols;
/* Exit fast decoding loop once we get close to the end. */
if (op[3] + 20 > olimit)
/* Exit fast decoding loop once we reach the end. */
if (op[3] == olimit)
break;
/* Exit the decoding loop if any input pointer has crossed the
@ -752,27 +784,42 @@ void HUF_decompress4X1_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
}
#endif
#define HUF_4X1_DECODE_SYMBOL(_stream, _symbol) \
do { \
int const index = (int)(bits[(_stream)] >> 53); \
int const entry = (int)dtable[index]; \
bits[(_stream)] <<= (entry & 0x3F); \
op[(_stream)][(_symbol)] = (BYTE)((entry >> 8) & 0xFF); \
} while (0)
#define HUF_4X1_RELOAD_STREAM(_stream) \
do { \
int const ctz = ZSTD_countTrailingZeros64(bits[(_stream)]); \
int const nbBits = ctz & 7; \
int const nbBytes = ctz >> 3; \
op[(_stream)] += 5; \
ip[(_stream)] -= nbBytes; \
bits[(_stream)] = MEM_read64(ip[(_stream)]) | 1; \
bits[(_stream)] <<= nbBits; \
} while (0)
/* Manually unroll the loop because compilers don't consistently
* unroll the inner loops, which destroys performance.
*/
do {
/* Decode 5 symbols in each of the 4 streams */
for (symbol = 0; symbol < 5; ++symbol) {
for (stream = 0; stream < 4; ++stream) {
int const index = (int)(bits[stream] >> 53);
int const entry = (int)dtable[index];
bits[stream] <<= (entry & 63);
op[stream][symbol] = (BYTE)((entry >> 8) & 0xFF);
}
}
/* Reload the bitstreams */
for (stream = 0; stream < 4; ++stream) {
int const ctz = ZSTD_countTrailingZeros64(bits[stream]);
int const nbBits = ctz & 7;
int const nbBytes = ctz >> 3;
op[stream] += 5;
ip[stream] -= nbBytes;
bits[stream] = MEM_read64(ip[stream]) | 1;
bits[stream] <<= nbBits;
}
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X1_DECODE_SYMBOL, 0);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X1_DECODE_SYMBOL, 1);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X1_DECODE_SYMBOL, 2);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X1_DECODE_SYMBOL, 3);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X1_DECODE_SYMBOL, 4);
/* Reload each of the 4 the bitstreams */
HUF_4X_FOR_EACH_STREAM(HUF_4X1_RELOAD_STREAM);
} while (op[3] < olimit);
#undef HUF_4X1_DECODE_SYMBOL
#undef HUF_4X1_RELOAD_STREAM
}
_out:
@ -797,8 +844,8 @@ HUF_decompress4X1_usingDTable_internal_fast(
HUF_DecompressFastLoopFn loopFn)
{
void const* dt = DTable + 1;
const BYTE* const iend = (const BYTE*)cSrc + 6;
BYTE* const oend = (BYTE*)dst + dstSize;
BYTE const* const ilowest = (BYTE const*)cSrc;
BYTE* const oend = ZSTD_maybeNullPtrAdd((BYTE*)dst, dstSize);
HUF_DecompressFastArgs args;
{ size_t const ret = HUF_DecompressFastArgs_init(&args, dst, dstSize, cSrc, cSrcSize, DTable);
FORWARD_IF_ERROR(ret, "Failed to init fast loop args");
@ -806,18 +853,22 @@ HUF_decompress4X1_usingDTable_internal_fast(
return 0;
}
assert(args.ip[0] >= args.ilimit);
assert(args.ip[0] >= args.ilowest);
loopFn(&args);
/* Our loop guarantees that ip[] >= ilimit and that we haven't
/* Our loop guarantees that ip[] >= ilowest and that we haven't
* overwritten any op[].
*/
assert(args.ip[0] >= iend);
assert(args.ip[1] >= iend);
assert(args.ip[2] >= iend);
assert(args.ip[3] >= iend);
assert(args.ip[0] >= ilowest);
assert(args.ip[0] >= ilowest);
assert(args.ip[1] >= ilowest);
assert(args.ip[2] >= ilowest);
assert(args.ip[3] >= ilowest);
assert(args.op[3] <= oend);
(void)iend;
assert(ilowest == args.ilowest);
assert(ilowest + 6 == args.iend[0]);
(void)ilowest;
/* finish bit streams one by one. */
{ size_t const segmentSize = (dstSize+3) / 4;
@ -868,7 +919,7 @@ static size_t HUF_decompress4X1_usingDTable_internal(void* dst, size_t dstSize,
}
#endif
if (!(flags & HUF_flags_disableFast)) {
if (HUF_ENABLE_FAST_DECODE && !(flags & HUF_flags_disableFast)) {
size_t const ret = HUF_decompress4X1_usingDTable_internal_fast(dst, dstSize, cSrc, cSrcSize, DTable, loopFn);
if (ret != 0)
return ret;
@ -1239,15 +1290,19 @@ HUF_decodeLastSymbolX2(void* op, BIT_DStream_t* DStream, const HUF_DEltX2* dt, c
}
#define HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) \
ptr += HUF_decodeSymbolX2(ptr, DStreamPtr, dt, dtLog)
do { ptr += HUF_decodeSymbolX2(ptr, DStreamPtr, dt, dtLog); } while (0)
#define HUF_DECODE_SYMBOLX2_1(ptr, DStreamPtr) \
do { \
if (MEM_64bits() || (HUF_TABLELOG_MAX<=12)) \
ptr += HUF_decodeSymbolX2(ptr, DStreamPtr, dt, dtLog)
ptr += HUF_decodeSymbolX2(ptr, DStreamPtr, dt, dtLog); \
} while (0)
#define HUF_DECODE_SYMBOLX2_2(ptr, DStreamPtr) \
do { \
if (MEM_64bits()) \
ptr += HUF_decodeSymbolX2(ptr, DStreamPtr, dt, dtLog)
ptr += HUF_decodeSymbolX2(ptr, DStreamPtr, dt, dtLog); \
} while (0)
HINT_INLINE size_t
HUF_decodeStreamX2(BYTE* p, BIT_DStream_t* bitDPtr, BYTE* const pEnd,
@ -1307,7 +1362,7 @@ HUF_decompress1X2_usingDTable_internal_body(
/* decode */
{ BYTE* const ostart = (BYTE*) dst;
BYTE* const oend = ostart + dstSize;
BYTE* const oend = ZSTD_maybeNullPtrAdd(ostart, dstSize);
const void* const dtPtr = DTable+1; /* force compiler to not use strict-aliasing */
const HUF_DEltX2* const dt = (const HUF_DEltX2*)dtPtr;
DTableDesc const dtd = HUF_getDTableDesc(DTable);
@ -1332,6 +1387,7 @@ HUF_decompress4X2_usingDTable_internal_body(
const HUF_DTable* DTable)
{
if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
if (dstSize < 6) return ERROR(corruption_detected); /* stream 4-split doesn't work */
{ const BYTE* const istart = (const BYTE*) cSrc;
BYTE* const ostart = (BYTE*) dst;
@ -1367,7 +1423,7 @@ HUF_decompress4X2_usingDTable_internal_body(
if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
if (opStart4 > oend) return ERROR(corruption_detected); /* overflow */
if (dstSize < 6) return ERROR(corruption_detected); /* stream 4-split doesn't work */
assert(dstSize >= 6 /* validated above */);
CHECK_F( BIT_initDStream(&bitD1, istart1, length1) );
CHECK_F( BIT_initDStream(&bitD2, istart2, length2) );
CHECK_F( BIT_initDStream(&bitD3, istart3, length3) );
@ -1472,7 +1528,7 @@ void HUF_decompress4X2_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
BYTE* op[4];
BYTE* oend[4];
HUF_DEltX2 const* const dtable = (HUF_DEltX2 const*)args->dt;
BYTE const* const ilimit = args->ilimit;
BYTE const* const ilowest = args->ilowest;
/* Copy the arguments to local registers. */
ZSTD_memcpy(&bits, &args->bits, sizeof(bits));
@ -1490,13 +1546,12 @@ void HUF_decompress4X2_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
for (;;) {
BYTE* olimit;
int stream;
int symbol;
/* Assert loop preconditions */
#ifndef NDEBUG
for (stream = 0; stream < 4; ++stream) {
assert(op[stream] <= oend[stream]);
assert(ip[stream] >= ilimit);
assert(ip[stream] >= ilowest);
}
#endif
/* Compute olimit */
@ -1509,7 +1564,7 @@ void HUF_decompress4X2_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
* We also know that each input pointer is >= ip[0]. So we can run
* iters loops before running out of input.
*/
size_t iters = (size_t)(ip[0] - ilimit) / 7;
size_t iters = (size_t)(ip[0] - ilowest) / 7;
/* Each iteration can produce up to 10 bytes of output per stream.
* Each output stream my advance at different rates. So take the
* minimum number of safe iterations among all the output streams.
@ -1527,8 +1582,8 @@ void HUF_decompress4X2_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
*/
olimit = op[3] + (iters * 5);
/* Exit the fast decoding loop if we are too close to the end. */
if (op[3] + 10 > olimit)
/* Exit the fast decoding loop once we reach the end. */
if (op[3] == olimit)
break;
/* Exit the decoding loop if any input pointer has crossed the
@ -1547,54 +1602,58 @@ void HUF_decompress4X2_usingDTable_internal_fast_c_loop(HUF_DecompressFastArgs*
}
#endif
#define HUF_4X2_DECODE_SYMBOL(_stream, _decode3) \
do { \
if ((_decode3) || (_stream) != 3) { \
int const index = (int)(bits[(_stream)] >> 53); \
HUF_DEltX2 const entry = dtable[index]; \
MEM_write16(op[(_stream)], entry.sequence); \
bits[(_stream)] <<= (entry.nbBits) & 0x3F; \
op[(_stream)] += (entry.length); \
} \
} while (0)
#define HUF_4X2_RELOAD_STREAM(_stream) \
do { \
HUF_4X2_DECODE_SYMBOL(3, 1); \
{ \
int const ctz = ZSTD_countTrailingZeros64(bits[(_stream)]); \
int const nbBits = ctz & 7; \
int const nbBytes = ctz >> 3; \
ip[(_stream)] -= nbBytes; \
bits[(_stream)] = MEM_read64(ip[(_stream)]) | 1; \
bits[(_stream)] <<= nbBits; \
} \
} while (0)
/* Manually unroll the loop because compilers don't consistently
* unroll the inner loops, which destroys performance.
*/
do {
/* Do 5 table lookups for each of the first 3 streams */
for (symbol = 0; symbol < 5; ++symbol) {
for (stream = 0; stream < 3; ++stream) {
int const index = (int)(bits[stream] >> 53);
HUF_DEltX2 const entry = dtable[index];
MEM_write16(op[stream], entry.sequence);
bits[stream] <<= (entry.nbBits);
op[stream] += (entry.length);
}
}
/* Do 1 table lookup from the final stream */
{
int const index = (int)(bits[3] >> 53);
HUF_DEltX2 const entry = dtable[index];
MEM_write16(op[3], entry.sequence);
bits[3] <<= (entry.nbBits);
op[3] += (entry.length);
}
/* Do 4 table lookups from the final stream & reload bitstreams */
for (stream = 0; stream < 4; ++stream) {
/* Do a table lookup from the final stream.
* This is interleaved with the reloading to reduce register
* pressure. This shouldn't be necessary, but compilers can
* struggle with codegen with high register pressure.
/* Decode 5 symbols from each of the first 3 streams.
* The final stream will be decoded during the reload phase
* to reduce register pressure.
*/
{
int const index = (int)(bits[3] >> 53);
HUF_DEltX2 const entry = dtable[index];
MEM_write16(op[3], entry.sequence);
bits[3] <<= (entry.nbBits);
op[3] += (entry.length);
}
/* Reload the bistreams. The final bitstream must be reloaded
* after the 5th symbol was decoded.
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X2_DECODE_SYMBOL, 0);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X2_DECODE_SYMBOL, 0);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X2_DECODE_SYMBOL, 0);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X2_DECODE_SYMBOL, 0);
HUF_4X_FOR_EACH_STREAM_WITH_VAR(HUF_4X2_DECODE_SYMBOL, 0);
/* Decode one symbol from the final stream */
HUF_4X2_DECODE_SYMBOL(3, 1);
/* Decode 4 symbols from the final stream & reload bitstreams.
* The final stream is reloaded last, meaning that all 5 symbols
* are decoded from the final stream before it is reloaded.
*/
{
int const ctz = ZSTD_countTrailingZeros64(bits[stream]);
int const nbBits = ctz & 7;
int const nbBytes = ctz >> 3;
ip[stream] -= nbBytes;
bits[stream] = MEM_read64(ip[stream]) | 1;
bits[stream] <<= nbBits;
}
}
HUF_4X_FOR_EACH_STREAM(HUF_4X2_RELOAD_STREAM);
} while (op[3] < olimit);
}
#undef HUF_4X2_DECODE_SYMBOL
#undef HUF_4X2_RELOAD_STREAM
_out:
/* Save the final values of each of the state variables back to args. */
@ -1611,8 +1670,8 @@ HUF_decompress4X2_usingDTable_internal_fast(
const HUF_DTable* DTable,
HUF_DecompressFastLoopFn loopFn) {
void const* dt = DTable + 1;
const BYTE* const iend = (const BYTE*)cSrc + 6;
BYTE* const oend = (BYTE*)dst + dstSize;
const BYTE* const ilowest = (const BYTE*)cSrc;
BYTE* const oend = ZSTD_maybeNullPtrAdd((BYTE*)dst, dstSize);
HUF_DecompressFastArgs args;
{
size_t const ret = HUF_DecompressFastArgs_init(&args, dst, dstSize, cSrc, cSrcSize, DTable);
@ -1621,16 +1680,19 @@ HUF_decompress4X2_usingDTable_internal_fast(
return 0;
}
assert(args.ip[0] >= args.ilimit);
assert(args.ip[0] >= args.ilowest);
loopFn(&args);
/* note : op4 already verified within main loop */
assert(args.ip[0] >= iend);
assert(args.ip[1] >= iend);
assert(args.ip[2] >= iend);
assert(args.ip[3] >= iend);
assert(args.ip[0] >= ilowest);
assert(args.ip[1] >= ilowest);
assert(args.ip[2] >= ilowest);
assert(args.ip[3] >= ilowest);
assert(args.op[3] <= oend);
(void)iend;
assert(ilowest == args.ilowest);
assert(ilowest + 6 == args.iend[0]);
(void)ilowest;
/* finish bitStreams one by one */
{
@ -1679,7 +1741,7 @@ static size_t HUF_decompress4X2_usingDTable_internal(void* dst, size_t dstSize,
}
#endif
if (!(flags & HUF_flags_disableFast)) {
if (HUF_ENABLE_FAST_DECODE && !(flags & HUF_flags_disableFast)) {
size_t const ret = HUF_decompress4X2_usingDTable_internal_fast(dst, dstSize, cSrc, cSrcSize, DTable, loopFn);
if (ret != 0)
return ret;

116
zstd/decompress/zstd_decompress.c
View File

@ -55,18 +55,19 @@
/*-*******************************************************
* Dependencies
*********************************************************/
#include "../common/allocations.h" /* ZSTD_customMalloc, ZSTD_customCalloc, ZSTD_customFree */
#include "../common/zstd_deps.h" /* ZSTD_memcpy, ZSTD_memmove, ZSTD_memset */
#include "../common/allocations.h" /* ZSTD_customMalloc, ZSTD_customCalloc, ZSTD_customFree */
#include "../common/error_private.h"
#include "../common/zstd_internal.h" /* blockProperties_t */
#include "../common/mem.h" /* low level memory routines */
#include "../common/bits.h" /* ZSTD_highbit32 */
#define FSE_STATIC_LINKING_ONLY
#include "../common/fse.h"
#include "../common/huf.h"
#include "../common/xxhash.h" /* XXH64_reset, XXH64_update, XXH64_digest, XXH64 */
#include "../common/zstd_internal.h" /* blockProperties_t */
#include "zstd_decompress_internal.h" /* ZSTD_DCtx */
#include "zstd_ddict.h" /* ZSTD_DDictDictContent */
#include "zstd_decompress_block.h" /* ZSTD_decompressBlock_internal */
#include "../common/bits.h" /* ZSTD_highbit32 */
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT>=1)
# include "../legacy/zstd_legacy.h"
@ -245,6 +246,7 @@ static void ZSTD_DCtx_resetParameters(ZSTD_DCtx* dctx)
dctx->forceIgnoreChecksum = ZSTD_d_validateChecksum;
dctx->refMultipleDDicts = ZSTD_rmd_refSingleDDict;
dctx->disableHufAsm = 0;
dctx->maxBlockSizeParam = 0;
}
static void ZSTD_initDCtx_internal(ZSTD_DCtx* dctx)
@ -265,6 +267,7 @@ static void ZSTD_initDCtx_internal(ZSTD_DCtx* dctx)
#endif
dctx->noForwardProgress = 0;
dctx->oversizedDuration = 0;
dctx->isFrameDecompression = 1;
#if DYNAMIC_BMI2
dctx->bmi2 = ZSTD_cpuSupportsBmi2();
#endif
@ -726,17 +729,17 @@ static ZSTD_frameSizeInfo ZSTD_errorFrameSizeInfo(size_t ret)
return frameSizeInfo;
}
static ZSTD_frameSizeInfo ZSTD_findFrameSizeInfo(const void* src, size_t srcSize)
static ZSTD_frameSizeInfo ZSTD_findFrameSizeInfo(const void* src, size_t srcSize, ZSTD_format_e format)
{
ZSTD_frameSizeInfo frameSizeInfo;
ZSTD_memset(&frameSizeInfo, 0, sizeof(ZSTD_frameSizeInfo));
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1)
if (ZSTD_isLegacy(src, srcSize))
if (format == ZSTD_f_zstd1 && ZSTD_isLegacy(src, srcSize))
return ZSTD_findFrameSizeInfoLegacy(src, srcSize);
#endif
if ((srcSize >= ZSTD_SKIPPABLEHEADERSIZE)
if (format == ZSTD_f_zstd1 && (srcSize >= ZSTD_SKIPPABLEHEADERSIZE)
&& (MEM_readLE32(src) & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) {
frameSizeInfo.compressedSize = readSkippableFrameSize(src, srcSize);
assert(ZSTD_isError(frameSizeInfo.compressedSize) ||
@ -750,7 +753,7 @@ static ZSTD_frameSizeInfo ZSTD_findFrameSizeInfo(const void* src, size_t srcSize
ZSTD_frameHeader zfh;
/* Extract Frame Header */
{ size_t const ret = ZSTD_getFrameHeader(&zfh, src, srcSize);
{ size_t const ret = ZSTD_getFrameHeader_advanced(&zfh, src, srcSize, format);
if (ZSTD_isError(ret))
return ZSTD_errorFrameSizeInfo(ret);
if (ret > 0)
@ -793,15 +796,17 @@ static ZSTD_frameSizeInfo ZSTD_findFrameSizeInfo(const void* src, size_t srcSize
}
}
static size_t ZSTD_findFrameCompressedSize_advanced(const void *src, size_t srcSize, ZSTD_format_e format) {
ZSTD_frameSizeInfo const frameSizeInfo = ZSTD_findFrameSizeInfo(src, srcSize, format);
return frameSizeInfo.compressedSize;
}
/** ZSTD_findFrameCompressedSize() :
* compatible with legacy mode
* `src` must point to the start of a ZSTD frame, ZSTD legacy frame, or skippable frame
* `srcSize` must be at least as large as the frame contained
* @return : the compressed size of the frame starting at `src` */
* See docs in zstd.h
* Note: compatible with legacy mode */
size_t ZSTD_findFrameCompressedSize(const void *src, size_t srcSize)
{
ZSTD_frameSizeInfo const frameSizeInfo = ZSTD_findFrameSizeInfo(src, srcSize);
return frameSizeInfo.compressedSize;
return ZSTD_findFrameCompressedSize_advanced(src, srcSize, ZSTD_f_zstd1);
}
/** ZSTD_decompressBound() :
@ -815,7 +820,7 @@ unsigned long long ZSTD_decompressBound(const void* src, size_t srcSize)
unsigned long long bound = 0;
/* Iterate over each frame */
while (srcSize > 0) {
ZSTD_frameSizeInfo const frameSizeInfo = ZSTD_findFrameSizeInfo(src, srcSize);
ZSTD_frameSizeInfo const frameSizeInfo = ZSTD_findFrameSizeInfo(src, srcSize, ZSTD_f_zstd1);
size_t const compressedSize = frameSizeInfo.compressedSize;
unsigned long long const decompressedBound = frameSizeInfo.decompressedBound;
if (ZSTD_isError(compressedSize) || decompressedBound == ZSTD_CONTENTSIZE_ERROR)
@ -835,7 +840,7 @@ size_t ZSTD_decompressionMargin(void const* src, size_t srcSize)
/* Iterate over each frame */
while (srcSize > 0) {
ZSTD_frameSizeInfo const frameSizeInfo = ZSTD_findFrameSizeInfo(src, srcSize);
ZSTD_frameSizeInfo const frameSizeInfo = ZSTD_findFrameSizeInfo(src, srcSize, ZSTD_f_zstd1);
size_t const compressedSize = frameSizeInfo.compressedSize;
unsigned long long const decompressedBound = frameSizeInfo.decompressedBound;
ZSTD_frameHeader zfh;
@ -971,6 +976,10 @@ static size_t ZSTD_decompressFrame(ZSTD_DCtx* dctx,
ip += frameHeaderSize; remainingSrcSize -= frameHeaderSize;
}
/* Shrink the blockSizeMax if enabled */
if (dctx->maxBlockSizeParam != 0)
dctx->fParams.blockSizeMax = MIN(dctx->fParams.blockSizeMax, (unsigned)dctx->maxBlockSizeParam);
/* Loop on each block */
while (1) {
BYTE* oBlockEnd = oend;
@ -1003,7 +1012,8 @@ static size_t ZSTD_decompressFrame(ZSTD_DCtx* dctx,
switch(blockProperties.blockType)
{
case bt_compressed:
decodedSize = ZSTD_decompressBlock_internal(dctx, op, (size_t)(oBlockEnd-op), ip, cBlockSize, /* frame */ 1, not_streaming);
assert(dctx->isFrameDecompression == 1);
decodedSize = ZSTD_decompressBlock_internal(dctx, op, (size_t)(oBlockEnd-op), ip, cBlockSize, not_streaming);
break;
case bt_raw :
/* Use oend instead of oBlockEnd because this function is safe to overlap. It uses memmove. */
@ -1016,12 +1026,14 @@ static size_t ZSTD_decompressFrame(ZSTD_DCtx* dctx,
default:
RETURN_ERROR(corruption_detected, "invalid block type");
}
if (ZSTD_isError(decodedSize)) return decodedSize;
if (dctx->validateChecksum)
FORWARD_IF_ERROR(decodedSize, "Block decompression failure");
DEBUGLOG(5, "Decompressed block of dSize = %u", (unsigned)decodedSize);
if (dctx->validateChecksum) {
XXH64_update(&dctx->xxhState, op, decodedSize);
if (decodedSize != 0)
}
if (decodedSize) /* support dst = NULL,0 */ {
op += decodedSize;
}
assert(ip != NULL);
ip += cBlockSize;
remainingSrcSize -= cBlockSize;
@ -1051,7 +1063,9 @@ static size_t ZSTD_decompressFrame(ZSTD_DCtx* dctx,
return (size_t)(op-ostart);
}
static size_t ZSTD_decompressMultiFrame(ZSTD_DCtx* dctx,
static
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_decompressMultiFrame(ZSTD_DCtx* dctx,
void* dst, size_t dstCapacity,
const void* src, size_t srcSize,
const void* dict, size_t dictSize,
@ -1071,7 +1085,7 @@ static size_t ZSTD_decompressMultiFrame(ZSTD_DCtx* dctx,
while (srcSize >= ZSTD_startingInputLength(dctx->format)) {
#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT >= 1)
if (ZSTD_isLegacy(src, srcSize)) {
if (dctx->format == ZSTD_f_zstd1 && ZSTD_isLegacy(src, srcSize)) {
size_t decodedSize;
size_t const frameSize = ZSTD_findFrameCompressedSizeLegacy(src, srcSize);
if (ZSTD_isError(frameSize)) return frameSize;
@ -1081,6 +1095,15 @@ static size_t ZSTD_decompressMultiFrame(ZSTD_DCtx* dctx,
decodedSize = ZSTD_decompressLegacy(dst, dstCapacity, src, frameSize, dict, dictSize);
if (ZSTD_isError(decodedSize)) return decodedSize;
{
unsigned long long const expectedSize = ZSTD_getFrameContentSize(src, srcSize);
RETURN_ERROR_IF(expectedSize == ZSTD_CONTENTSIZE_ERROR, corruption_detected, "Corrupted frame header!");
if (expectedSize != ZSTD_CONTENTSIZE_UNKNOWN) {
RETURN_ERROR_IF(expectedSize != decodedSize, corruption_detected,
"Frame header size does not match decoded size!");
}
}
assert(decodedSize <= dstCapacity);
dst = (BYTE*)dst + decodedSize;
dstCapacity -= decodedSize;
@ -1092,7 +1115,7 @@ static size_t ZSTD_decompressMultiFrame(ZSTD_DCtx* dctx,
}
#endif
if (srcSize >= 4) {
if (dctx->format == ZSTD_f_zstd1 && srcSize >= 4) {
U32 const magicNumber = MEM_readLE32(src);
DEBUGLOG(5, "reading magic number %08X", (unsigned)magicNumber);
if ((magicNumber & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) {
@ -1319,7 +1342,8 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, c
{
case bt_compressed:
DEBUGLOG(5, "ZSTD_decompressContinue: case bt_compressed");
rSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize, /* frame */ 1, is_streaming);
assert(dctx->isFrameDecompression == 1);
rSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize, is_streaming);
dctx->expected = 0; /* Streaming not supported */
break;
case bt_raw :
@ -1388,6 +1412,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t dstCapacity, c
case ZSTDds_decodeSkippableHeader:
assert(src != NULL);
assert(srcSize <= ZSTD_SKIPPABLEHEADERSIZE);
assert(dctx->format != ZSTD_f_zstd1_magicless);
ZSTD_memcpy(dctx->headerBuffer + (ZSTD_SKIPPABLEHEADERSIZE - srcSize), src, srcSize); /* complete skippable header */
dctx->expected = MEM_readLE32(dctx->headerBuffer + ZSTD_FRAMEIDSIZE); /* note : dctx->expected can grow seriously large, beyond local buffer size */
dctx->stage = ZSTDds_skipFrame;
@ -1548,6 +1573,7 @@ size_t ZSTD_decompressBegin(ZSTD_DCtx* dctx)
dctx->litEntropy = dctx->fseEntropy = 0;
dctx->dictID = 0;
dctx->bType = bt_reserved;
dctx->isFrameDecompression = 1;
ZSTD_STATIC_ASSERT(sizeof(dctx->entropy.rep) == sizeof(repStartValue));
ZSTD_memcpy(dctx->entropy.rep, repStartValue, sizeof(repStartValue)); /* initial repcodes */
dctx->LLTptr = dctx->entropy.LLTable;
@ -1819,6 +1845,10 @@ ZSTD_bounds ZSTD_dParam_getBounds(ZSTD_dParameter dParam)
bounds.lowerBound = 0;
bounds.upperBound = 1;
return bounds;
case ZSTD_d_maxBlockSize:
bounds.lowerBound = ZSTD_BLOCKSIZE_MAX_MIN;
bounds.upperBound = ZSTD_BLOCKSIZE_MAX;
return bounds;
default:;
}
@ -1863,6 +1893,9 @@ size_t ZSTD_DCtx_getParameter(ZSTD_DCtx* dctx, ZSTD_dParameter param, int* value
case ZSTD_d_disableHuffmanAssembly:
*value = (int)dctx->disableHufAsm;
return 0;
case ZSTD_d_maxBlockSize:
*value = dctx->maxBlockSizeParam;
return 0;
default:;
}
RETURN_ERROR(parameter_unsupported, "");
@ -1900,6 +1933,10 @@ size_t ZSTD_DCtx_setParameter(ZSTD_DCtx* dctx, ZSTD_dParameter dParam, int value
CHECK_DBOUNDS(ZSTD_d_disableHuffmanAssembly, value);
dctx->disableHufAsm = value != 0;
return 0;
case ZSTD_d_maxBlockSize:
if (value != 0) CHECK_DBOUNDS(ZSTD_d_maxBlockSize, value);
dctx->maxBlockSizeParam = value;
return 0;
default:;
}
RETURN_ERROR(parameter_unsupported, "");
@ -1911,6 +1948,7 @@ size_t ZSTD_DCtx_reset(ZSTD_DCtx* dctx, ZSTD_ResetDirective reset)
|| (reset == ZSTD_reset_session_and_parameters) ) {
dctx->streamStage = zdss_init;
dctx->noForwardProgress = 0;
dctx->isFrameDecompression = 1;
}
if ( (reset == ZSTD_reset_parameters)
|| (reset == ZSTD_reset_session_and_parameters) ) {
@ -1927,11 +1965,17 @@ size_t ZSTD_sizeof_DStream(const ZSTD_DStream* dctx)
return ZSTD_sizeof_DCtx(dctx);
}
size_t ZSTD_decodingBufferSize_min(unsigned long long windowSize, unsigned long long frameContentSize)
static size_t ZSTD_decodingBufferSize_internal(unsigned long long windowSize, unsigned long long frameContentSize, size_t blockSizeMax)
{
size_t const blockSize = (size_t) MIN(windowSize, ZSTD_BLOCKSIZE_MAX);
/* space is needed to store the litbuffer after the output of a given block without stomping the extDict of a previous run, as well as to cover both windows against wildcopy*/
unsigned long long const neededRBSize = windowSize + blockSize + ZSTD_BLOCKSIZE_MAX + (WILDCOPY_OVERLENGTH * 2);
size_t const blockSize = MIN((size_t)MIN(windowSize, ZSTD_BLOCKSIZE_MAX), blockSizeMax);
/* We need blockSize + WILDCOPY_OVERLENGTH worth of buffer so that if a block
* ends at windowSize + WILDCOPY_OVERLENGTH + 1 bytes, we can start writing
* the block at the beginning of the output buffer, and maintain a full window.
*
* We need another blockSize worth of buffer so that we can store split
* literals at the end of the block without overwriting the extDict window.
*/
unsigned long long const neededRBSize = windowSize + (blockSize * 2) + (WILDCOPY_OVERLENGTH * 2);
unsigned long long const neededSize = MIN(frameContentSize, neededRBSize);
size_t const minRBSize = (size_t) neededSize;
RETURN_ERROR_IF((unsigned long long)minRBSize != neededSize,
@ -1939,6 +1983,11 @@ size_t ZSTD_decodingBufferSize_min(unsigned long long windowSize, unsigned long
return minRBSize;
}
size_t ZSTD_decodingBufferSize_min(unsigned long long windowSize, unsigned long long frameContentSize)
{
return ZSTD_decodingBufferSize_internal(windowSize, frameContentSize, ZSTD_BLOCKSIZE_MAX);
}
size_t ZSTD_estimateDStreamSize(size_t windowSize)
{
size_t const blockSize = MIN(windowSize, ZSTD_BLOCKSIZE_MAX);
@ -2134,12 +2183,12 @@ size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inB
if (zds->fParams.frameContentSize != ZSTD_CONTENTSIZE_UNKNOWN
&& zds->fParams.frameType != ZSTD_skippableFrame
&& (U64)(size_t)(oend-op) >= zds->fParams.frameContentSize) {
size_t const cSize = ZSTD_findFrameCompressedSize(istart, (size_t)(iend-istart));
size_t const cSize = ZSTD_findFrameCompressedSize_advanced(istart, (size_t)(iend-istart), zds->format);
if (cSize <= (size_t)(iend-istart)) {
/* shortcut : using single-pass mode */
size_t const decompressedSize = ZSTD_decompress_usingDDict(zds, op, (size_t)(oend-op), istart, cSize, ZSTD_getDDict(zds));
if (ZSTD_isError(decompressedSize)) return decompressedSize;
DEBUGLOG(4, "shortcut to single-pass ZSTD_decompress_usingDDict()")
DEBUGLOG(4, "shortcut to single-pass ZSTD_decompress_usingDDict()");
assert(istart != NULL);
ip = istart + cSize;
op = op ? op + decompressedSize : op; /* can occur if frameContentSize = 0 (empty frame) */
@ -2161,7 +2210,8 @@ size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inB
DEBUGLOG(4, "Consume header");
FORWARD_IF_ERROR(ZSTD_decompressBegin_usingDDict(zds, ZSTD_getDDict(zds)), "");
if ((MEM_readLE32(zds->headerBuffer) & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) { /* skippable frame */
if (zds->format == ZSTD_f_zstd1
&& (MEM_readLE32(zds->headerBuffer) & ZSTD_MAGIC_SKIPPABLE_MASK) == ZSTD_MAGIC_SKIPPABLE_START) { /* skippable frame */
zds->expected = MEM_readLE32(zds->headerBuffer + ZSTD_FRAMEIDSIZE);
zds->stage = ZSTDds_skipFrame;
} else {
@ -2177,11 +2227,13 @@ size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inB
zds->fParams.windowSize = MAX(zds->fParams.windowSize, 1U << ZSTD_WINDOWLOG_ABSOLUTEMIN);
RETURN_ERROR_IF(zds->fParams.windowSize > zds->maxWindowSize,
frameParameter_windowTooLarge, "");
if (zds->maxBlockSizeParam != 0)
zds->fParams.blockSizeMax = MIN(zds->fParams.blockSizeMax, (unsigned)zds->maxBlockSizeParam);
/* Adapt buffer sizes to frame header instructions */
{ size_t const neededInBuffSize = MAX(zds->fParams.blockSizeMax, 4 /* frame checksum */);
size_t const neededOutBuffSize = zds->outBufferMode == ZSTD_bm_buffered
? ZSTD_decodingBufferSize_min(zds->fParams.windowSize, zds->fParams.frameContentSize)
? ZSTD_decodingBufferSize_internal(zds->fParams.windowSize, zds->fParams.frameContentSize, zds->fParams.blockSizeMax)
: 0;
ZSTD_DCtx_updateOversizedDuration(zds, neededInBuffSize, neededOutBuffSize);

379
zstd/decompress/zstd_decompress_block.c
View File

@ -51,6 +51,13 @@ static void ZSTD_copy4(void* dst, const void* src) { ZSTD_memcpy(dst, src, 4); }
* Block decoding
***************************************************************/
static size_t ZSTD_blockSizeMax(ZSTD_DCtx const* dctx)
{
size_t const blockSizeMax = dctx->isFrameDecompression ? dctx->fParams.blockSizeMax : ZSTD_BLOCKSIZE_MAX;
assert(blockSizeMax <= ZSTD_BLOCKSIZE_MAX);
return blockSizeMax;
}
/*! ZSTD_getcBlockSize() :
* Provides the size of compressed block from block header `src` */
size_t ZSTD_getcBlockSize(const void* src, size_t srcSize,
@ -73,41 +80,49 @@ size_t ZSTD_getcBlockSize(const void* src, size_t srcSize,
static void ZSTD_allocateLiteralsBuffer(ZSTD_DCtx* dctx, void* const dst, const size_t dstCapacity, const size_t litSize,
const streaming_operation streaming, const size_t expectedWriteSize, const unsigned splitImmediately)
{
if (streaming == not_streaming && dstCapacity > ZSTD_BLOCKSIZE_MAX + WILDCOPY_OVERLENGTH + litSize + WILDCOPY_OVERLENGTH)
{
/* room for litbuffer to fit without read faulting */
dctx->litBuffer = (BYTE*)dst + ZSTD_BLOCKSIZE_MAX + WILDCOPY_OVERLENGTH;
size_t const blockSizeMax = ZSTD_blockSizeMax(dctx);
assert(litSize <= blockSizeMax);
assert(dctx->isFrameDecompression || streaming == not_streaming);
assert(expectedWriteSize <= blockSizeMax);
if (streaming == not_streaming && dstCapacity > blockSizeMax + WILDCOPY_OVERLENGTH + litSize + WILDCOPY_OVERLENGTH) {
/* If we aren't streaming, we can just put the literals after the output
* of the current block. We don't need to worry about overwriting the
* extDict of our window, because it doesn't exist.
* So if we have space after the end of the block, just put it there.
*/
dctx->litBuffer = (BYTE*)dst + blockSizeMax + WILDCOPY_OVERLENGTH;
dctx->litBufferEnd = dctx->litBuffer + litSize;
dctx->litBufferLocation = ZSTD_in_dst;
}
else if (litSize > ZSTD_LITBUFFEREXTRASIZE)
{
/* won't fit in litExtraBuffer, so it will be split between end of dst and extra buffer */
} else if (litSize <= ZSTD_LITBUFFEREXTRASIZE) {
/* Literals fit entirely within the extra buffer, put them there to avoid
* having to split the literals.
*/
dctx->litBuffer = dctx->litExtraBuffer;
dctx->litBufferEnd = dctx->litBuffer + litSize;
dctx->litBufferLocation = ZSTD_not_in_dst;
} else {
assert(blockSizeMax > ZSTD_LITBUFFEREXTRASIZE);
/* Literals must be split between the output block and the extra lit
* buffer. We fill the extra lit buffer with the tail of the literals,
* and put the rest of the literals at the end of the block, with
* WILDCOPY_OVERLENGTH of buffer room to allow for overreads.
* This MUST not write more than our maxBlockSize beyond dst, because in
* streaming mode, that could overwrite part of our extDict window.
*/
if (splitImmediately) {
/* won't fit in litExtraBuffer, so it will be split between end of dst and extra buffer */
dctx->litBuffer = (BYTE*)dst + expectedWriteSize - litSize + ZSTD_LITBUFFEREXTRASIZE - WILDCOPY_OVERLENGTH;
dctx->litBufferEnd = dctx->litBuffer + litSize - ZSTD_LITBUFFEREXTRASIZE;
}
else {
} else {
/* initially this will be stored entirely in dst during huffman decoding, it will partially be shifted to litExtraBuffer after */
dctx->litBuffer = (BYTE*)dst + expectedWriteSize - litSize;
dctx->litBufferEnd = (BYTE*)dst + expectedWriteSize;
}
dctx->litBufferLocation = ZSTD_split;
}
else
{
/* fits entirely within litExtraBuffer, so no split is necessary */
dctx->litBuffer = dctx->litExtraBuffer;
dctx->litBufferEnd = dctx->litBuffer + litSize;
dctx->litBufferLocation = ZSTD_not_in_dst;
assert(dctx->litBufferEnd <= (BYTE*)dst + expectedWriteSize);
}
}
/* Hidden declaration for fullbench */
size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
const void* src, size_t srcSize,
void* dst, size_t dstCapacity, const streaming_operation streaming);
/*! ZSTD_decodeLiteralsBlock() :
* Where it is possible to do so without being stomped by the output during decompression, the literals block will be stored
* in the dstBuffer. If there is room to do so, it will be stored in full in the excess dst space after where the current
@ -116,7 +131,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
*
* @return : nb of bytes read from src (< srcSize )
* note : symbol not declared but exposed for fullbench */
size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
static size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
const void* src, size_t srcSize, /* note : srcSize < BLOCKSIZE */
void* dst, size_t dstCapacity, const streaming_operation streaming)
{
@ -125,6 +140,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
{ const BYTE* const istart = (const BYTE*) src;
symbolEncodingType_e const litEncType = (symbolEncodingType_e)(istart[0] & 3);
size_t const blockSizeMax = ZSTD_blockSizeMax(dctx);
switch(litEncType)
{
@ -140,7 +156,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
U32 const lhlCode = (istart[0] >> 2) & 3;
U32 const lhc = MEM_readLE32(istart);
size_t hufSuccess;
size_t expectedWriteSize = MIN(ZSTD_BLOCKSIZE_MAX, dstCapacity);
size_t expectedWriteSize = MIN(blockSizeMax, dstCapacity);
int const flags = 0
| (ZSTD_DCtx_get_bmi2(dctx) ? HUF_flags_bmi2 : 0)
| (dctx->disableHufAsm ? HUF_flags_disableAsm : 0);
@ -167,7 +183,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
break;
}
RETURN_ERROR_IF(litSize > 0 && dst == NULL, dstSize_tooSmall, "NULL not handled");
RETURN_ERROR_IF(litSize > ZSTD_BLOCKSIZE_MAX, corruption_detected, "");
RETURN_ERROR_IF(litSize > blockSizeMax, corruption_detected, "");
if (!singleStream)
RETURN_ERROR_IF(litSize < MIN_LITERALS_FOR_4_STREAMS, literals_headerWrong,
"Not enough literals (%zu) for the 4-streams mode (min %u)",
@ -214,10 +230,12 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
}
if (dctx->litBufferLocation == ZSTD_split)
{
assert(litSize > ZSTD_LITBUFFEREXTRASIZE);
ZSTD_memcpy(dctx->litExtraBuffer, dctx->litBufferEnd - ZSTD_LITBUFFEREXTRASIZE, ZSTD_LITBUFFEREXTRASIZE);
ZSTD_memmove(dctx->litBuffer + ZSTD_LITBUFFEREXTRASIZE - WILDCOPY_OVERLENGTH, dctx->litBuffer, litSize - ZSTD_LITBUFFEREXTRASIZE);
dctx->litBuffer += ZSTD_LITBUFFEREXTRASIZE - WILDCOPY_OVERLENGTH;
dctx->litBufferEnd -= WILDCOPY_OVERLENGTH;
assert(dctx->litBufferEnd <= (BYTE*)dst + blockSizeMax);
}
RETURN_ERROR_IF(HUF_isError(hufSuccess), corruption_detected, "");
@ -232,7 +250,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
case set_basic:
{ size_t litSize, lhSize;
U32 const lhlCode = ((istart[0]) >> 2) & 3;
size_t expectedWriteSize = MIN(ZSTD_BLOCKSIZE_MAX, dstCapacity);
size_t expectedWriteSize = MIN(blockSizeMax, dstCapacity);
switch(lhlCode)
{
case 0: case 2: default: /* note : default is impossible, since lhlCode into [0..3] */
@ -251,6 +269,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
}
RETURN_ERROR_IF(litSize > 0 && dst == NULL, dstSize_tooSmall, "NULL not handled");
RETURN_ERROR_IF(litSize > blockSizeMax, corruption_detected, "");
RETURN_ERROR_IF(expectedWriteSize < litSize, dstSize_tooSmall, "");
ZSTD_allocateLiteralsBuffer(dctx, dst, dstCapacity, litSize, streaming, expectedWriteSize, 1);
if (lhSize+litSize+WILDCOPY_OVERLENGTH > srcSize) { /* risk reading beyond src buffer with wildcopy */
@ -279,7 +298,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
case set_rle:
{ U32 const lhlCode = ((istart[0]) >> 2) & 3;
size_t litSize, lhSize;
size_t expectedWriteSize = MIN(ZSTD_BLOCKSIZE_MAX, dstCapacity);
size_t expectedWriteSize = MIN(blockSizeMax, dstCapacity);
switch(lhlCode)
{
case 0: case 2: default: /* note : default is impossible, since lhlCode into [0..3] */
@ -298,7 +317,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
break;
}
RETURN_ERROR_IF(litSize > 0 && dst == NULL, dstSize_tooSmall, "NULL not handled");
RETURN_ERROR_IF(litSize > ZSTD_BLOCKSIZE_MAX, corruption_detected, "");
RETURN_ERROR_IF(litSize > blockSizeMax, corruption_detected, "");
RETURN_ERROR_IF(expectedWriteSize < litSize, dstSize_tooSmall, "");
ZSTD_allocateLiteralsBuffer(dctx, dst, dstCapacity, litSize, streaming, expectedWriteSize, 1);
if (dctx->litBufferLocation == ZSTD_split)
@ -320,6 +339,18 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
}
}
/* Hidden declaration for fullbench */
size_t ZSTD_decodeLiteralsBlock_wrapper(ZSTD_DCtx* dctx,
const void* src, size_t srcSize,
void* dst, size_t dstCapacity);
size_t ZSTD_decodeLiteralsBlock_wrapper(ZSTD_DCtx* dctx,
const void* src, size_t srcSize,
void* dst, size_t dstCapacity)
{
dctx->isFrameDecompression = 0;
return ZSTD_decodeLiteralsBlock(dctx, src, srcSize, dst, dstCapacity, not_streaming);
}
/* Default FSE distribution tables.
* These are pre-calculated FSE decoding tables using default distributions as defined in specification :
* https://github.com/facebook/zstd/blob/release/doc/zstd_compression_format.md#default-distributions
@ -675,11 +706,6 @@ size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx* dctx, int* nbSeqPtr,
/* SeqHead */
nbSeq = *ip++;
if (!nbSeq) {
*nbSeqPtr=0;
RETURN_ERROR_IF(srcSize != 1, srcSize_wrong, "");
return 1;
}
if (nbSeq > 0x7F) {
if (nbSeq == 0xFF) {
RETURN_ERROR_IF(ip+2 > iend, srcSize_wrong, "");
@ -692,8 +718,16 @@ size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx* dctx, int* nbSeqPtr,
}
*nbSeqPtr = nbSeq;
if (nbSeq == 0) {
/* No sequence : section ends immediately */
RETURN_ERROR_IF(ip != iend, corruption_detected,
"extraneous data present in the Sequences section");
return (size_t)(ip - istart);
}
/* FSE table descriptors */
RETURN_ERROR_IF(ip+1 > iend, srcSize_wrong, ""); /* minimum possible size: 1 byte for symbol encoding types */
RETURN_ERROR_IF(*ip & 3, corruption_detected, ""); /* The last field, Reserved, must be all-zeroes. */
{ symbolEncodingType_e const LLtype = (symbolEncodingType_e)(*ip >> 6);
symbolEncodingType_e const OFtype = (symbolEncodingType_e)((*ip >> 4) & 3);
symbolEncodingType_e const MLtype = (symbolEncodingType_e)((*ip >> 2) & 3);
@ -840,7 +874,7 @@ static void ZSTD_safecopy(BYTE* op, const BYTE* const oend_w, BYTE const* ip, pt
/* ZSTD_safecopyDstBeforeSrc():
* This version allows overlap with dst before src, or handles the non-overlap case with dst after src
* Kept separate from more common ZSTD_safecopy case to avoid performance impact to the safecopy common case */
static void ZSTD_safecopyDstBeforeSrc(BYTE* op, BYTE const* ip, ptrdiff_t length) {
static void ZSTD_safecopyDstBeforeSrc(BYTE* op, const BYTE* ip, ptrdiff_t length) {
ptrdiff_t const diff = op - ip;
BYTE* const oend = op + length;
@ -869,6 +903,7 @@ static void ZSTD_safecopyDstBeforeSrc(BYTE* op, BYTE const* ip, ptrdiff_t length
* to be optimized for many small sequences, since those fall into ZSTD_execSequence().
*/
FORCE_NOINLINE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_execSequenceEnd(BYTE* op,
BYTE* const oend, seq_t sequence,
const BYTE** litPtr, const BYTE* const litLimit,
@ -916,6 +951,7 @@ size_t ZSTD_execSequenceEnd(BYTE* op,
* This version is intended to be used during instances where the litBuffer is still split. It is kept separate to avoid performance impact for the good case.
*/
FORCE_NOINLINE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_execSequenceEndSplitLitBuffer(BYTE* op,
BYTE* const oend, const BYTE* const oend_w, seq_t sequence,
const BYTE** litPtr, const BYTE* const litLimit,
@ -961,6 +997,7 @@ size_t ZSTD_execSequenceEndSplitLitBuffer(BYTE* op,
}
HINT_INLINE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_execSequence(BYTE* op,
BYTE* const oend, seq_t sequence,
const BYTE** litPtr, const BYTE* const litLimit,
@ -1059,6 +1096,7 @@ size_t ZSTD_execSequence(BYTE* op,
}
HINT_INLINE
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
size_t ZSTD_execSequenceSplitLitBuffer(BYTE* op,
BYTE* const oend, const BYTE* const oend_w, seq_t sequence,
const BYTE** litPtr, const BYTE* const litLimit,
@ -1181,14 +1219,20 @@ ZSTD_updateFseStateWithDInfo(ZSTD_fseState* DStatePtr, BIT_DStream_t* bitD, U16
typedef enum { ZSTD_lo_isRegularOffset, ZSTD_lo_isLongOffset=1 } ZSTD_longOffset_e;
/**
* ZSTD_decodeSequence():
* @p longOffsets : tells the decoder to reload more bit while decoding large offsets
* only used in 32-bit mode
* @return : Sequence (litL + matchL + offset)
*/
FORCE_INLINE_TEMPLATE seq_t
ZSTD_decodeSequence(seqState_t* seqState, const ZSTD_longOffset_e longOffsets)
ZSTD_decodeSequence(seqState_t* seqState, const ZSTD_longOffset_e longOffsets, const int isLastSeq)
{
seq_t seq;
/*
* ZSTD_seqSymbol is a structure with a total of 64 bits wide. So it can be
* loaded in one operation and extracted its fields by simply shifting or
* bit-extracting on aarch64.
* ZSTD_seqSymbol is a 64 bits wide structure.
* It can be loaded in one operation
* and its fields extracted by simply shifting or bit-extracting on aarch64.
* GCC doesn't recognize this and generates more unnecessary ldr/ldrb/ldrh
* operations that cause performance drop. This can be avoided by using this
* ZSTD_memcpy hack.
@ -1261,7 +1305,7 @@ ZSTD_decodeSequence(seqState_t* seqState, const ZSTD_longOffset_e longOffsets)
} else {
offset = ofBase + ll0 + BIT_readBitsFast(&seqState->DStream, 1);
{ size_t temp = (offset==3) ? seqState->prevOffset[0] - 1 : seqState->prevOffset[offset];
temp += !temp; /* 0 is not valid; input is corrupted; force offset to 1 */
temp -= !temp; /* 0 is not valid: input corrupted => force offset to -1 => corruption detected at execSequence */
if (offset != 1) seqState->prevOffset[2] = seqState->prevOffset[1];
seqState->prevOffset[1] = seqState->prevOffset[0];
seqState->prevOffset[0] = offset = temp;
@ -1288,17 +1332,22 @@ ZSTD_decodeSequence(seqState_t* seqState, const ZSTD_longOffset_e longOffsets)
DEBUGLOG(6, "seq: litL=%u, matchL=%u, offset=%u",
(U32)seq.litLength, (U32)seq.matchLength, (U32)seq.offset);
if (!isLastSeq) {
/* don't update FSE state for last Sequence */
ZSTD_updateFseStateWithDInfo(&seqState->stateLL, &seqState->DStream, llNext, llnbBits); /* <= 9 bits */
ZSTD_updateFseStateWithDInfo(&seqState->stateML, &seqState->DStream, mlNext, mlnbBits); /* <= 9 bits */
if (MEM_32bits()) BIT_reloadDStream(&seqState->DStream); /* <= 18 bits */
ZSTD_updateFseStateWithDInfo(&seqState->stateOffb, &seqState->DStream, ofNext, ofnbBits); /* <= 8 bits */
BIT_reloadDStream(&seqState->DStream);
}
}
return seq;
}
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
MEM_STATIC int ZSTD_dictionaryIsActive(ZSTD_DCtx const* dctx, BYTE const* prefixStart, BYTE const* oLitEnd)
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
#if DEBUGLEVEL >= 1
static int ZSTD_dictionaryIsActive(ZSTD_DCtx const* dctx, BYTE const* prefixStart, BYTE const* oLitEnd)
{
size_t const windowSize = dctx->fParams.windowSize;
/* No dictionary used. */
@ -1312,14 +1361,16 @@ MEM_STATIC int ZSTD_dictionaryIsActive(ZSTD_DCtx const* dctx, BYTE const* prefix
/* Dictionary is active. */
return 1;
}
#endif
MEM_STATIC void ZSTD_assertValidSequence(
static void ZSTD_assertValidSequence(
ZSTD_DCtx const* dctx,
BYTE const* op, BYTE const* oend,
seq_t const seq,
BYTE const* prefixStart, BYTE const* virtualStart)
{
#if DEBUGLEVEL >= 1
if (dctx->isFrameDecompression) {
size_t const windowSize = dctx->fParams.windowSize;
size_t const sequenceSize = seq.litLength + seq.matchLength;
BYTE const* const oLitEnd = op + seq.litLength;
@ -1327,7 +1378,7 @@ MEM_STATIC void ZSTD_assertValidSequence(
(U32)seq.litLength, (U32)seq.matchLength, (U32)seq.offset);
assert(op <= oend);
assert((size_t)(oend - op) >= sequenceSize);
assert(sequenceSize <= ZSTD_BLOCKSIZE_MAX);
assert(sequenceSize <= ZSTD_blockSizeMax(dctx));
if (ZSTD_dictionaryIsActive(dctx, prefixStart, oLitEnd)) {
size_t const dictSize = (size_t)((char const*)dctx->dictContentEndForFuzzing - (char const*)dctx->dictContentBeginForFuzzing);
/* Offset must be within the dictionary. */
@ -1337,6 +1388,7 @@ MEM_STATIC void ZSTD_assertValidSequence(
/* Offset must be within our window. */
assert(seq.offset <= windowSize);
}
}
#else
(void)dctx, (void)op, (void)oend, (void)seq, (void)prefixStart, (void)virtualStart;
#endif
@ -1351,23 +1403,21 @@ DONT_VECTORIZE
ZSTD_decompressSequences_bodySplitLitBuffer( ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
const BYTE* ip = (const BYTE*)seqStart;
const BYTE* const iend = ip + seqSize;
BYTE* const ostart = (BYTE*)dst;
BYTE* const oend = ostart + maxDstSize;
BYTE* const oend = ZSTD_maybeNullPtrAdd(ostart, maxDstSize);
BYTE* op = ostart;
const BYTE* litPtr = dctx->litPtr;
const BYTE* litBufferEnd = dctx->litBufferEnd;
const BYTE* const prefixStart = (const BYTE*) (dctx->prefixStart);
const BYTE* const vBase = (const BYTE*) (dctx->virtualStart);
const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd);
DEBUGLOG(5, "ZSTD_decompressSequences_bodySplitLitBuffer");
(void)frame;
DEBUGLOG(5, "ZSTD_decompressSequences_bodySplitLitBuffer (%i seqs)", nbSeq);
/* Regen sequences */
/* Literals are split between internal buffer & output buffer */
if (nbSeq) {
seqState_t seqState;
dctx->fseEntropy = 1;
@ -1386,8 +1436,7 @@ ZSTD_decompressSequences_bodySplitLitBuffer( ZSTD_DCtx* dctx,
BIT_DStream_completed < BIT_DStream_overflow);
/* decompress without overrunning litPtr begins */
{
seq_t sequence = ZSTD_decodeSequence(&seqState, isLongOffset);
{ seq_t sequence = {0,0,0}; /* some static analyzer believe that @sequence is not initialized (it necessarily is, since for(;;) loop as at least one iteration) */
/* Align the decompression loop to 32 + 16 bytes.
*
* zstd compiled with gcc-9 on an Intel i9-9900k shows 10% decompression
@ -1449,27 +1498,26 @@ ZSTD_decompressSequences_bodySplitLitBuffer( ZSTD_DCtx* dctx,
#endif
/* Handle the initial state where litBuffer is currently split between dst and litExtraBuffer */
for (; litPtr + sequence.litLength <= dctx->litBufferEnd; ) {
size_t const oneSeqSize = ZSTD_execSequenceSplitLitBuffer(op, oend, litPtr + sequence.litLength - WILDCOPY_OVERLENGTH, sequence, &litPtr, litBufferEnd, prefixStart, vBase, dictEnd);
for ( ; nbSeq; nbSeq--) {
sequence = ZSTD_decodeSequence(&seqState, isLongOffset, nbSeq==1);
if (litPtr + sequence.litLength > dctx->litBufferEnd) break;
{ size_t const oneSeqSize = ZSTD_execSequenceSplitLitBuffer(op, oend, litPtr + sequence.litLength - WILDCOPY_OVERLENGTH, sequence, &litPtr, litBufferEnd, prefixStart, vBase, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
#endif
if (UNLIKELY(ZSTD_isError(oneSeqSize)))
return oneSeqSize;
DEBUGLOG(6, "regenerated sequence size : %u", (U32)oneSeqSize);
op += oneSeqSize;
if (UNLIKELY(!--nbSeq))
break;
BIT_reloadDStream(&(seqState.DStream));
sequence = ZSTD_decodeSequence(&seqState, isLongOffset);
}
} }
DEBUGLOG(6, "reached: (litPtr + sequence.litLength > dctx->litBufferEnd)");
/* If there are more sequences, they will need to read literals from litExtraBuffer; copy over the remainder from dst and update litPtr and litEnd */
if (nbSeq > 0) {
const size_t leftoverLit = dctx->litBufferEnd - litPtr;
if (leftoverLit)
{
DEBUGLOG(6, "There are %i sequences left, and %zu/%zu literals left in buffer", nbSeq, leftoverLit, sequence.litLength);
if (leftoverLit) {
RETURN_ERROR_IF(leftoverLit > (size_t)(oend - op), dstSize_tooSmall, "remaining lit must fit within dstBuffer");
ZSTD_safecopyDstBeforeSrc(op, litPtr, leftoverLit);
sequence.litLength -= leftoverLit;
@ -1478,24 +1526,22 @@ ZSTD_decompressSequences_bodySplitLitBuffer( ZSTD_DCtx* dctx,
litPtr = dctx->litExtraBuffer;
litBufferEnd = dctx->litExtraBuffer + ZSTD_LITBUFFEREXTRASIZE;
dctx->litBufferLocation = ZSTD_not_in_dst;
{
size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litBufferEnd, prefixStart, vBase, dictEnd);
{ size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litBufferEnd, prefixStart, vBase, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
#endif
if (UNLIKELY(ZSTD_isError(oneSeqSize)))
return oneSeqSize;
DEBUGLOG(6, "regenerated sequence size : %u", (U32)oneSeqSize);
op += oneSeqSize;
if (--nbSeq)
BIT_reloadDStream(&(seqState.DStream));
}
nbSeq--;
}
}
if (nbSeq > 0) /* there is remaining lit from extra buffer */
{
if (nbSeq > 0) {
/* there is remaining lit from extra buffer */
#if defined(__GNUC__) && defined(__x86_64__)
__asm__(".p2align 6");
@ -1514,35 +1560,34 @@ ZSTD_decompressSequences_bodySplitLitBuffer( ZSTD_DCtx* dctx,
# endif
#endif
for (; ; ) {
seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset);
for ( ; nbSeq ; nbSeq--) {
seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset, nbSeq==1);
size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litBufferEnd, prefixStart, vBase, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
#endif
if (UNLIKELY(ZSTD_isError(oneSeqSize)))
return oneSeqSize;
DEBUGLOG(6, "regenerated sequence size : %u", (U32)oneSeqSize);
op += oneSeqSize;
if (UNLIKELY(!--nbSeq))
break;
BIT_reloadDStream(&(seqState.DStream));
}
}
/* check if reached exact end */
DEBUGLOG(5, "ZSTD_decompressSequences_bodySplitLitBuffer: after decode loop, remaining nbSeq : %i", nbSeq);
RETURN_ERROR_IF(nbSeq, corruption_detected, "");
RETURN_ERROR_IF(BIT_reloadDStream(&seqState.DStream) < BIT_DStream_completed, corruption_detected, "");
DEBUGLOG(5, "bitStream : start=%p, ptr=%p, bitsConsumed=%u", seqState.DStream.start, seqState.DStream.ptr, seqState.DStream.bitsConsumed);
RETURN_ERROR_IF(!BIT_endOfDStream(&seqState.DStream), corruption_detected, "");
/* save reps for next block */
{ U32 i; for (i=0; i<ZSTD_REP_NUM; i++) dctx->entropy.rep[i] = (U32)(seqState.prevOffset[i]); }
}
/* last literal segment */
if (dctx->litBufferLocation == ZSTD_split) /* split hasn't been reached yet, first get dst then copy litExtraBuffer */
{
size_t const lastLLSize = litBufferEnd - litPtr;
if (dctx->litBufferLocation == ZSTD_split) {
/* split hasn't been reached yet, first get dst then copy litExtraBuffer */
size_t const lastLLSize = (size_t)(litBufferEnd - litPtr);
DEBUGLOG(6, "copy last literals from segment : %u", (U32)lastLLSize);
RETURN_ERROR_IF(lastLLSize > (size_t)(oend - op), dstSize_tooSmall, "");
if (op != NULL) {
ZSTD_memmove(op, litPtr, lastLLSize);
@ -1552,15 +1597,17 @@ ZSTD_decompressSequences_bodySplitLitBuffer( ZSTD_DCtx* dctx,
litBufferEnd = dctx->litExtraBuffer + ZSTD_LITBUFFEREXTRASIZE;
dctx->litBufferLocation = ZSTD_not_in_dst;
}
{ size_t const lastLLSize = litBufferEnd - litPtr;
/* copy last literals from internal buffer */
{ size_t const lastLLSize = (size_t)(litBufferEnd - litPtr);
DEBUGLOG(6, "copy last literals from internal buffer : %u", (U32)lastLLSize);
RETURN_ERROR_IF(lastLLSize > (size_t)(oend-op), dstSize_tooSmall, "");
if (op != NULL) {
ZSTD_memcpy(op, litPtr, lastLLSize);
op += lastLLSize;
}
}
} }
return op-ostart;
DEBUGLOG(6, "decoded block of size %u bytes", (U32)(op - ostart));
return (size_t)(op - ostart);
}
FORCE_INLINE_TEMPLATE size_t
@ -1568,13 +1615,12 @@ DONT_VECTORIZE
ZSTD_decompressSequences_body(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
const BYTE* ip = (const BYTE*)seqStart;
const BYTE* const iend = ip + seqSize;
BYTE* const ostart = (BYTE*)dst;
BYTE* const oend = dctx->litBufferLocation == ZSTD_not_in_dst ? ostart + maxDstSize : dctx->litBuffer;
BYTE* const oend = dctx->litBufferLocation == ZSTD_not_in_dst ? ZSTD_maybeNullPtrAdd(ostart, maxDstSize) : dctx->litBuffer;
BYTE* op = ostart;
const BYTE* litPtr = dctx->litPtr;
const BYTE* const litEnd = litPtr + dctx->litSize;
@ -1582,7 +1628,6 @@ ZSTD_decompressSequences_body(ZSTD_DCtx* dctx,
const BYTE* const vBase = (const BYTE*)(dctx->virtualStart);
const BYTE* const dictEnd = (const BYTE*)(dctx->dictEnd);
DEBUGLOG(5, "ZSTD_decompressSequences_body: nbSeq = %d", nbSeq);
(void)frame;
/* Regen sequences */
if (nbSeq) {
@ -1597,11 +1642,6 @@ ZSTD_decompressSequences_body(ZSTD_DCtx* dctx,
ZSTD_initFseState(&seqState.stateML, &seqState.DStream, dctx->MLTptr);
assert(dst != NULL);
ZSTD_STATIC_ASSERT(
BIT_DStream_unfinished < BIT_DStream_completed &&
BIT_DStream_endOfBuffer < BIT_DStream_completed &&
BIT_DStream_completed < BIT_DStream_overflow);
#if defined(__GNUC__) && defined(__x86_64__)
__asm__(".p2align 6");
__asm__("nop");
@ -1616,73 +1656,70 @@ ZSTD_decompressSequences_body(ZSTD_DCtx* dctx,
# endif
#endif
for ( ; ; ) {
seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset);
for ( ; nbSeq ; nbSeq--) {
seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset, nbSeq==1);
size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litEnd, prefixStart, vBase, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
ZSTD_assertValidSequence(dctx, op, oend, sequence, prefixStart, vBase);
#endif
if (UNLIKELY(ZSTD_isError(oneSeqSize)))
return oneSeqSize;
DEBUGLOG(6, "regenerated sequence size : %u", (U32)oneSeqSize);
op += oneSeqSize;
if (UNLIKELY(!--nbSeq))
break;
BIT_reloadDStream(&(seqState.DStream));
}
/* check if reached exact end */
DEBUGLOG(5, "ZSTD_decompressSequences_body: after decode loop, remaining nbSeq : %i", nbSeq);
RETURN_ERROR_IF(nbSeq, corruption_detected, "");
RETURN_ERROR_IF(BIT_reloadDStream(&seqState.DStream) < BIT_DStream_completed, corruption_detected, "");
assert(nbSeq == 0);
RETURN_ERROR_IF(!BIT_endOfDStream(&seqState.DStream), corruption_detected, "");
/* save reps for next block */
{ U32 i; for (i=0; i<ZSTD_REP_NUM; i++) dctx->entropy.rep[i] = (U32)(seqState.prevOffset[i]); }
}
/* last literal segment */
{ size_t const lastLLSize = litEnd - litPtr;
{ size_t const lastLLSize = (size_t)(litEnd - litPtr);
DEBUGLOG(6, "copy last literals : %u", (U32)lastLLSize);
RETURN_ERROR_IF(lastLLSize > (size_t)(oend-op), dstSize_tooSmall, "");
if (op != NULL) {
ZSTD_memcpy(op, litPtr, lastLLSize);
op += lastLLSize;
}
}
} }
return op-ostart;
DEBUGLOG(6, "decoded block of size %u bytes", (U32)(op - ostart));
return (size_t)(op - ostart);
}
static size_t
ZSTD_decompressSequences_default(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
return ZSTD_decompressSequences_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
static size_t
ZSTD_decompressSequencesSplitLitBuffer_default(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
return ZSTD_decompressSequences_bodySplitLitBuffer(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences_bodySplitLitBuffer(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif /* ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG */
#ifndef ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT
FORCE_INLINE_TEMPLATE size_t
ZSTD_prefetchMatch(size_t prefetchPos, seq_t const sequence,
FORCE_INLINE_TEMPLATE
size_t ZSTD_prefetchMatch(size_t prefetchPos, seq_t const sequence,
const BYTE* const prefixStart, const BYTE* const dictEnd)
{
prefetchPos += sequence.litLength;
{ const BYTE* const matchBase = (sequence.offset > prefetchPos) ? dictEnd : prefixStart;
const BYTE* const match = matchBase + prefetchPos - sequence.offset; /* note : this operation can overflow when seq.offset is really too large, which can only happen when input is corrupted.
/* note : this operation can overflow when seq.offset is really too large, which can only happen when input is corrupted.
* No consequence though : memory address is only used for prefetching, not for dereferencing */
const BYTE* const match = ZSTD_wrappedPtrSub(ZSTD_wrappedPtrAdd(matchBase, prefetchPos), sequence.offset);
PREFETCH_L1(match); PREFETCH_L1(match+CACHELINE_SIZE); /* note : it's safe to invoke PREFETCH() on any memory address, including invalid ones */
}
return prefetchPos + sequence.matchLength;
@ -1697,20 +1734,18 @@ ZSTD_decompressSequencesLong_body(
ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
const BYTE* ip = (const BYTE*)seqStart;
const BYTE* const iend = ip + seqSize;
BYTE* const ostart = (BYTE*)dst;
BYTE* const oend = dctx->litBufferLocation == ZSTD_in_dst ? dctx->litBuffer : ostart + maxDstSize;
BYTE* const oend = dctx->litBufferLocation == ZSTD_in_dst ? dctx->litBuffer : ZSTD_maybeNullPtrAdd(ostart, maxDstSize);
BYTE* op = ostart;
const BYTE* litPtr = dctx->litPtr;
const BYTE* litBufferEnd = dctx->litBufferEnd;
const BYTE* const prefixStart = (const BYTE*) (dctx->prefixStart);
const BYTE* const dictStart = (const BYTE*) (dctx->virtualStart);
const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd);
(void)frame;
/* Regen sequences */
if (nbSeq) {
@ -1735,20 +1770,17 @@ ZSTD_decompressSequencesLong_body(
ZSTD_initFseState(&seqState.stateML, &seqState.DStream, dctx->MLTptr);
/* prepare in advance */
for (seqNb=0; (BIT_reloadDStream(&seqState.DStream) <= BIT_DStream_completed) && (seqNb<seqAdvance); seqNb++) {
seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset);
for (seqNb=0; seqNb<seqAdvance; seqNb++) {
seq_t const sequence = ZSTD_decodeSequence(&seqState, isLongOffset, seqNb == nbSeq-1);
prefetchPos = ZSTD_prefetchMatch(prefetchPos, sequence, prefixStart, dictEnd);
sequences[seqNb] = sequence;
}
RETURN_ERROR_IF(seqNb<seqAdvance, corruption_detected, "");
/* decompress without stomping litBuffer */
for (; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && (seqNb < nbSeq); seqNb++) {
seq_t sequence = ZSTD_decodeSequence(&seqState, isLongOffset);
size_t oneSeqSize;
for (; seqNb < nbSeq; seqNb++) {
seq_t sequence = ZSTD_decodeSequence(&seqState, isLongOffset, seqNb == nbSeq-1);
if (dctx->litBufferLocation == ZSTD_split && litPtr + sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK].litLength > dctx->litBufferEnd)
{
if (dctx->litBufferLocation == ZSTD_split && litPtr + sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK].litLength > dctx->litBufferEnd) {
/* lit buffer is reaching split point, empty out the first buffer and transition to litExtraBuffer */
const size_t leftoverLit = dctx->litBufferEnd - litPtr;
if (leftoverLit)
@ -1761,26 +1793,26 @@ ZSTD_decompressSequencesLong_body(
litPtr = dctx->litExtraBuffer;
litBufferEnd = dctx->litExtraBuffer + ZSTD_LITBUFFEREXTRASIZE;
dctx->litBufferLocation = ZSTD_not_in_dst;
oneSeqSize = ZSTD_execSequence(op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd);
{ size_t const oneSeqSize = ZSTD_execSequence(op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], prefixStart, dictStart);
ZSTD_assertValidSequence(dctx, op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], prefixStart, dictStart);
#endif
if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
prefetchPos = ZSTD_prefetchMatch(prefetchPos, sequence, prefixStart, dictEnd);
sequences[seqNb & STORED_SEQS_MASK] = sequence;
op += oneSeqSize;
}
} }
else
{
/* lit buffer is either wholly contained in first or second split, or not split at all*/
oneSeqSize = dctx->litBufferLocation == ZSTD_split ?
size_t const oneSeqSize = dctx->litBufferLocation == ZSTD_split ?
ZSTD_execSequenceSplitLitBuffer(op, oend, litPtr + sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK].litLength - WILDCOPY_OVERLENGTH, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd) :
ZSTD_execSequence(op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], prefixStart, dictStart);
ZSTD_assertValidSequence(dctx, op, oend, sequences[(seqNb - ADVANCED_SEQS) & STORED_SEQS_MASK], prefixStart, dictStart);
#endif
if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
@ -1789,17 +1821,15 @@ ZSTD_decompressSequencesLong_body(
op += oneSeqSize;
}
}
RETURN_ERROR_IF(seqNb<nbSeq, corruption_detected, "");
RETURN_ERROR_IF(!BIT_endOfDStream(&seqState.DStream), corruption_detected, "");
/* finish queue */
seqNb -= seqAdvance;
for ( ; seqNb<nbSeq ; seqNb++) {
seq_t *sequence = &(sequences[seqNb&STORED_SEQS_MASK]);
if (dctx->litBufferLocation == ZSTD_split && litPtr + sequence->litLength > dctx->litBufferEnd)
{
if (dctx->litBufferLocation == ZSTD_split && litPtr + sequence->litLength > dctx->litBufferEnd) {
const size_t leftoverLit = dctx->litBufferEnd - litPtr;
if (leftoverLit)
{
if (leftoverLit) {
RETURN_ERROR_IF(leftoverLit > (size_t)(oend - op), dstSize_tooSmall, "remaining lit must fit within dstBuffer");
ZSTD_safecopyDstBeforeSrc(op, litPtr, leftoverLit);
sequence->litLength -= leftoverLit;
@ -1808,11 +1838,10 @@ ZSTD_decompressSequencesLong_body(
litPtr = dctx->litExtraBuffer;
litBufferEnd = dctx->litExtraBuffer + ZSTD_LITBUFFEREXTRASIZE;
dctx->litBufferLocation = ZSTD_not_in_dst;
{
size_t const oneSeqSize = ZSTD_execSequence(op, oend, *sequence, &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd);
{ size_t const oneSeqSize = ZSTD_execSequence(op, oend, *sequence, &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequences[seqNb&STORED_SEQS_MASK], prefixStart, dictStart);
ZSTD_assertValidSequence(dctx, op, oend, sequences[seqNb&STORED_SEQS_MASK], prefixStart, dictStart);
#endif
if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
op += oneSeqSize;
@ -1825,7 +1854,7 @@ ZSTD_decompressSequencesLong_body(
ZSTD_execSequence(op, oend, *sequence, &litPtr, litBufferEnd, prefixStart, dictStart, dictEnd);
#if defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION) && defined(FUZZING_ASSERT_VALID_SEQUENCE)
assert(!ZSTD_isError(oneSeqSize));
if (frame) ZSTD_assertValidSequence(dctx, op, oend, sequences[seqNb&STORED_SEQS_MASK], prefixStart, dictStart);
ZSTD_assertValidSequence(dctx, op, oend, sequences[seqNb&STORED_SEQS_MASK], prefixStart, dictStart);
#endif
if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
op += oneSeqSize;
@ -1837,8 +1866,7 @@ ZSTD_decompressSequencesLong_body(
}
/* last literal segment */
if (dctx->litBufferLocation == ZSTD_split) /* first deplete literal buffer in dst, then copy litExtraBuffer */
{
if (dctx->litBufferLocation == ZSTD_split) { /* first deplete literal buffer in dst, then copy litExtraBuffer */
size_t const lastLLSize = litBufferEnd - litPtr;
RETURN_ERROR_IF(lastLLSize > (size_t)(oend - op), dstSize_tooSmall, "");
if (op != NULL) {
@ -1856,17 +1884,16 @@ ZSTD_decompressSequencesLong_body(
}
}
return op-ostart;
return (size_t)(op - ostart);
}
static size_t
ZSTD_decompressSequencesLong_default(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
return ZSTD_decompressSequencesLong_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesLong_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif /* ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT */
@ -1880,20 +1907,18 @@ DONT_VECTORIZE
ZSTD_decompressSequences_bmi2(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
return ZSTD_decompressSequences_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
static BMI2_TARGET_ATTRIBUTE size_t
DONT_VECTORIZE
ZSTD_decompressSequencesSplitLitBuffer_bmi2(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
return ZSTD_decompressSequences_bodySplitLitBuffer(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences_bodySplitLitBuffer(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif /* ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG */
@ -1902,10 +1927,9 @@ static BMI2_TARGET_ATTRIBUTE size_t
ZSTD_decompressSequencesLong_bmi2(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
return ZSTD_decompressSequencesLong_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesLong_body(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif /* ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT */
@ -1915,37 +1939,34 @@ typedef size_t (*ZSTD_decompressSequences_t)(
ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame);
const ZSTD_longOffset_e isLongOffset);
#ifndef ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG
static size_t
ZSTD_decompressSequences(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
DEBUGLOG(5, "ZSTD_decompressSequences");
#if DYNAMIC_BMI2
if (ZSTD_DCtx_get_bmi2(dctx)) {
return ZSTD_decompressSequences_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif
return ZSTD_decompressSequences_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
static size_t
ZSTD_decompressSequencesSplitLitBuffer(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
DEBUGLOG(5, "ZSTD_decompressSequencesSplitLitBuffer");
#if DYNAMIC_BMI2
if (ZSTD_DCtx_get_bmi2(dctx)) {
return ZSTD_decompressSequencesSplitLitBuffer_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesSplitLitBuffer_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif
return ZSTD_decompressSequencesSplitLitBuffer_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesSplitLitBuffer_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif /* ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG */
@ -1960,16 +1981,15 @@ static size_t
ZSTD_decompressSequencesLong(ZSTD_DCtx* dctx,
void* dst, size_t maxDstSize,
const void* seqStart, size_t seqSize, int nbSeq,
const ZSTD_longOffset_e isLongOffset,
const int frame)
const ZSTD_longOffset_e isLongOffset)
{
DEBUGLOG(5, "ZSTD_decompressSequencesLong");
#if DYNAMIC_BMI2
if (ZSTD_DCtx_get_bmi2(dctx)) {
return ZSTD_decompressSequencesLong_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesLong_bmi2(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif
return ZSTD_decompressSequencesLong_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesLong_default(dctx, dst, maxDstSize, seqStart, seqSize, nbSeq, isLongOffset);
}
#endif /* ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT */
@ -2051,20 +2071,20 @@ static size_t ZSTD_maxShortOffset(void)
size_t
ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
void* dst, size_t dstCapacity,
const void* src, size_t srcSize, const int frame, const streaming_operation streaming)
const void* src, size_t srcSize, const streaming_operation streaming)
{ /* blockType == blockCompressed */
const BYTE* ip = (const BYTE*)src;
DEBUGLOG(5, "ZSTD_decompressBlock_internal (size : %u)", (U32)srcSize);
DEBUGLOG(5, "ZSTD_decompressBlock_internal (cSize : %u)", (unsigned)srcSize);
/* Note : the wording of the specification
* allows compressed block to be sized exactly ZSTD_BLOCKSIZE_MAX.
* allows compressed block to be sized exactly ZSTD_blockSizeMax(dctx).
* This generally does not happen, as it makes little sense,
* since an uncompressed block would feature same size and have no decompression cost.
* Also, note that decoder from reference libzstd before < v1.5.4
* would consider this edge case as an error.
* As a consequence, avoid generating compressed blocks of size ZSTD_BLOCKSIZE_MAX
* As a consequence, avoid generating compressed blocks of size ZSTD_blockSizeMax(dctx)
* for broader compatibility with the deployed ecosystem of zstd decoders */
RETURN_ERROR_IF(srcSize > ZSTD_BLOCKSIZE_MAX, srcSize_wrong, "");
RETURN_ERROR_IF(srcSize > ZSTD_blockSizeMax(dctx), srcSize_wrong, "");
/* Decode literals section */
{ size_t const litCSize = ZSTD_decodeLiteralsBlock(dctx, src, srcSize, dst, dstCapacity, streaming);
@ -2079,8 +2099,8 @@ ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
/* Compute the maximum block size, which must also work when !frame and fParams are unset.
* Additionally, take the min with dstCapacity to ensure that the totalHistorySize fits in a size_t.
*/
size_t const blockSizeMax = MIN(dstCapacity, (frame ? dctx->fParams.blockSizeMax : ZSTD_BLOCKSIZE_MAX));
size_t const totalHistorySize = ZSTD_totalHistorySize((BYTE*)dst + blockSizeMax, (BYTE const*)dctx->virtualStart);
size_t const blockSizeMax = MIN(dstCapacity, ZSTD_blockSizeMax(dctx));
size_t const totalHistorySize = ZSTD_totalHistorySize(ZSTD_maybeNullPtrAdd((BYTE*)dst, blockSizeMax), (BYTE const*)dctx->virtualStart);
/* isLongOffset must be true if there are long offsets.
* Offsets are long if they are larger than ZSTD_maxShortOffset().
* We don't expect that to be the case in 64-bit mode.
@ -2145,21 +2165,22 @@ ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
{
#endif
#ifndef ZSTD_FORCE_DECOMPRESS_SEQUENCES_SHORT
return ZSTD_decompressSequencesLong(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesLong(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset);
#endif
}
#ifndef ZSTD_FORCE_DECOMPRESS_SEQUENCES_LONG
/* else */
if (dctx->litBufferLocation == ZSTD_split)
return ZSTD_decompressSequencesSplitLitBuffer(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequencesSplitLitBuffer(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset);
else
return ZSTD_decompressSequences(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset, frame);
return ZSTD_decompressSequences(dctx, dst, dstCapacity, ip, srcSize, nbSeq, isLongOffset);
#endif
}
}
ZSTD_ALLOW_POINTER_OVERFLOW_ATTR
void ZSTD_checkContinuity(ZSTD_DCtx* dctx, const void* dst, size_t dstSize)
{
if (dst != dctx->previousDstEnd && dstSize > 0) { /* not contiguous */
@ -2176,8 +2197,10 @@ size_t ZSTD_decompressBlock_deprecated(ZSTD_DCtx* dctx,
const void* src, size_t srcSize)
{
size_t dSize;
dctx->isFrameDecompression = 0;
ZSTD_checkContinuity(dctx, dst, dstCapacity);
dSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize, /* frame */ 0, not_streaming);
dSize = ZSTD_decompressBlock_internal(dctx, dst, dstCapacity, src, srcSize, not_streaming);
FORWARD_IF_ERROR(dSize, "");
dctx->previousDstEnd = (char*)dst + dSize;
return dSize;
}

2
zstd/decompress/zstd_decompress_block.h
View File

@ -47,7 +47,7 @@ typedef enum {
*/
size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
void* dst, size_t dstCapacity,
const void* src, size_t srcSize, const int frame, const streaming_operation streaming);
const void* src, size_t srcSize, const streaming_operation streaming);
/* ZSTD_buildFSETable() :
* generate FSE decoding table for one symbol (ll, ml or off)

2
zstd/decompress/zstd_decompress_internal.h
View File

@ -153,6 +153,7 @@ struct ZSTD_DCtx_s
size_t litSize;
size_t rleSize;
size_t staticSize;
int isFrameDecompression;
#if DYNAMIC_BMI2 != 0
int bmi2; /* == 1 if the CPU supports BMI2 and 0 otherwise. CPU support is determined dynamically once per context lifetime. */
#endif
@ -166,6 +167,7 @@ struct ZSTD_DCtx_s
ZSTD_DDictHashSet* ddictSet; /* Hash set for multiple ddicts */
ZSTD_refMultipleDDicts_e refMultipleDDicts; /* User specified: if == 1, will allow references to multiple DDicts. Default == 0 (disabled) */
int disableHufAsm;
int maxBlockSizeParam;
/* streaming */
ZSTD_dStreamStage streamStage;

20
zstd/dictBuilder/cover.c
View File

@ -31,8 +31,8 @@
#endif
#include "../common/mem.h" /* read */
#include "../common/pool.h"
#include "../common/threading.h"
#include "../common/pool.h" /* POOL_ctx */
#include "../common/threading.h" /* ZSTD_pthread_mutex_t */
#include "../common/zstd_internal.h" /* includes zstd.h */
#include "../common/bits.h" /* ZSTD_highbit32 */
#include "../zdict.h"
@ -303,7 +303,8 @@ static int WIN_CDECL COVER_strict_cmp8(const void *lp, const void *rp) {
*/
static const size_t *COVER_lower_bound(const size_t* first, const size_t* last,
size_t value) {
size_t count = last - first;
size_t count = (size_t)(last - first);
assert(last >= first);
while (count != 0) {
size_t step = count / 2;
const size_t *ptr = first;
@ -549,7 +550,8 @@ static void COVER_ctx_destroy(COVER_ctx_t *ctx) {
*/
static size_t COVER_ctx_init(COVER_ctx_t *ctx, const void *samplesBuffer,
const size_t *samplesSizes, unsigned nbSamples,
unsigned d, double splitPoint) {
unsigned d, double splitPoint)
{
const BYTE *const samples = (const BYTE *)samplesBuffer;
const size_t totalSamplesSize = COVER_sum(samplesSizes, nbSamples);
/* Split samples into testing and training sets */
@ -733,7 +735,7 @@ static size_t COVER_buildDictionary(const COVER_ctx_t *ctx, U32 *freqs,
return tail;
}
ZDICTLIB_API size_t ZDICT_trainFromBuffer_cover(
ZDICTLIB_STATIC_API size_t ZDICT_trainFromBuffer_cover(
void *dictBuffer, size_t dictBufferCapacity,
const void *samplesBuffer, const size_t *samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t parameters)
@ -907,8 +909,10 @@ void COVER_best_start(COVER_best_t *best) {
* Decrements liveJobs and signals any waiting threads if liveJobs == 0.
* If this dictionary is the best so far save it and its parameters.
*/
void COVER_best_finish(COVER_best_t *best, ZDICT_cover_params_t parameters,
COVER_dictSelection_t selection) {
void COVER_best_finish(COVER_best_t* best,
ZDICT_cover_params_t parameters,
COVER_dictSelection_t selection)
{
void* dict = selection.dictContent;
size_t compressedSize = selection.totalCompressedSize;
size_t dictSize = selection.dictSize;
@ -1119,7 +1123,7 @@ _cleanup:
free(freqs);
}
ZDICTLIB_API size_t ZDICT_optimizeTrainFromBuffer_cover(
ZDICTLIB_STATIC_API size_t ZDICT_optimizeTrainFromBuffer_cover(
void* dictBuffer, size_t dictBufferCapacity, const void* samplesBuffer,
const size_t* samplesSizes, unsigned nbSamples,
ZDICT_cover_params_t* parameters)

10
zstd/dictBuilder/cover.h
View File

@ -12,14 +12,8 @@
# define ZDICT_STATIC_LINKING_ONLY
#endif
#include <stdio.h> /* fprintf */
#include <stdlib.h> /* malloc, free, qsort */
#include <string.h> /* memset */
#include <time.h> /* clock */
#include "../common/mem.h" /* read */
#include "../common/pool.h"
#include "../common/threading.h"
#include "../common/zstd_internal.h" /* includes zstd.h */
#include "../common/threading.h" /* ZSTD_pthread_mutex_t */
#include "../common/mem.h" /* U32, BYTE */
#include "../zdict.h"
/**

4
zstd/dictBuilder/fastcover.c
View File

@ -545,7 +545,7 @@ FASTCOVER_convertToFastCoverParams(ZDICT_cover_params_t coverParams,
}
ZDICTLIB_API size_t
ZDICTLIB_STATIC_API size_t
ZDICT_trainFromBuffer_fastCover(void* dictBuffer, size_t dictBufferCapacity,
const void* samplesBuffer,
const size_t* samplesSizes, unsigned nbSamples,
@ -614,7 +614,7 @@ ZDICT_trainFromBuffer_fastCover(void* dictBuffer, size_t dictBufferCapacity,
}
ZDICTLIB_API size_t
ZDICTLIB_STATIC_API size_t
ZDICT_optimizeTrainFromBuffer_fastCover(
void* dictBuffer, size_t dictBufferCapacity,
const void* samplesBuffer,

18
zstd/dictBuilder/zdict.c
View File

@ -74,9 +74,9 @@ static const U32 g_selectivity_default = 9;
* Console display
***************************************/
#undef DISPLAY
#define DISPLAY(...) { fprintf(stderr, __VA_ARGS__); fflush( stderr ); }
#define DISPLAY(...) do { fprintf(stderr, __VA_ARGS__); fflush( stderr ); } while (0)
#undef DISPLAYLEVEL
#define DISPLAYLEVEL(l, ...) if (notificationLevel>=l) { DISPLAY(__VA_ARGS__); } /* 0 : no display; 1: errors; 2: default; 3: details; 4: debug */
#define DISPLAYLEVEL(l, ...) do { if (notificationLevel>=l) { DISPLAY(__VA_ARGS__); } } while (0) /* 0 : no display; 1: errors; 2: default; 3: details; 4: debug */
static clock_t ZDICT_clockSpan(clock_t nPrevious) { return clock() - nPrevious; }
@ -477,10 +477,16 @@ static size_t ZDICT_trainBuffer_legacy(dictItem* dictList, U32 dictListSize,
clock_t const refreshRate = CLOCKS_PER_SEC * 3 / 10;
# undef DISPLAYUPDATE
# define DISPLAYUPDATE(l, ...) if (notificationLevel>=l) { \
if (ZDICT_clockSpan(displayClock) > refreshRate) \
{ displayClock = clock(); DISPLAY(__VA_ARGS__); \
if (notificationLevel>=4) fflush(stderr); } }
# define DISPLAYUPDATE(l, ...) \
do { \
if (notificationLevel>=l) { \
if (ZDICT_clockSpan(displayClock) > refreshRate) { \
displayClock = clock(); \
DISPLAY(__VA_ARGS__); \
} \
if (notificationLevel>=4) fflush(stderr); \
} \
} while (0)
/* init */
DISPLAYLEVEL(2, "\r%70s\r", ""); /* clean display line */

183
zstd/zstd.h
View File

@ -106,7 +106,7 @@ extern "C" {
/*------ Version ------*/
#define ZSTD_VERSION_MAJOR 1
#define ZSTD_VERSION_MINOR 5
#define ZSTD_VERSION_RELEASE 5
#define ZSTD_VERSION_RELEASE 6
#define ZSTD_VERSION_NUMBER (ZSTD_VERSION_MAJOR *100*100 + ZSTD_VERSION_MINOR *100 + ZSTD_VERSION_RELEASE)
/*! ZSTD_versionNumber() :
@ -228,7 +228,7 @@ ZSTDLIB_API size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize)
* for example to size a static array on stack.
* Will produce constant value 0 if srcSize too large.
*/
#define ZSTD_MAX_INPUT_SIZE ((sizeof(size_t)==8) ? 0xFF00FF00FF00FF00LLU : 0xFF00FF00U)
#define ZSTD_MAX_INPUT_SIZE ((sizeof(size_t)==8) ? 0xFF00FF00FF00FF00ULL : 0xFF00FF00U)
#define ZSTD_COMPRESSBOUND(srcSize) (((size_t)(srcSize) >= ZSTD_MAX_INPUT_SIZE) ? 0 : (srcSize) + ((srcSize)>>8) + (((srcSize) < (128<<10)) ? (((128<<10) - (srcSize)) >> 11) /* margin, from 64 to 0 */ : 0)) /* this formula ensures that bound(A) + bound(B) <= bound(A+B) as long as A and B >= 128 KB */
ZSTDLIB_API size_t ZSTD_compressBound(size_t srcSize); /*!< maximum compressed size in worst case single-pass scenario */
/* ZSTD_isError() :
@ -249,7 +249,7 @@ ZSTDLIB_API int ZSTD_defaultCLevel(void); /*!< default compres
/*= Compression context
* When compressing many times,
* it is recommended to allocate a context just once,
* and re-use it for each successive compression operation.
* and reuse it for each successive compression operation.
* This will make workload friendlier for system's memory.
* Note : re-using context is just a speed / resource optimization.
* It doesn't change the compression ratio, which remains identical.
@ -262,9 +262,9 @@ ZSTDLIB_API size_t ZSTD_freeCCtx(ZSTD_CCtx* cctx); /* accept NULL pointer *
/*! ZSTD_compressCCtx() :
* Same as ZSTD_compress(), using an explicit ZSTD_CCtx.
* Important : in order to behave similarly to `ZSTD_compress()`,
* this function compresses at requested compression level,
* __ignoring any other parameter__ .
* Important : in order to mirror `ZSTD_compress()` behavior,
* this function compresses at the requested compression level,
* __ignoring any other advanced parameter__ .
* If any advanced parameter was set using the advanced API,
* they will all be reset. Only `compressionLevel` remains.
*/
@ -276,7 +276,7 @@ ZSTDLIB_API size_t ZSTD_compressCCtx(ZSTD_CCtx* cctx,
/*= Decompression context
* When decompressing many times,
* it is recommended to allocate a context only once,
* and re-use it for each successive compression operation.
* and reuse it for each successive compression operation.
* This will make workload friendlier for system's memory.
* Use one context per thread for parallel execution. */
typedef struct ZSTD_DCtx_s ZSTD_DCtx;
@ -286,7 +286,7 @@ ZSTDLIB_API size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx); /* accept NULL pointer *
/*! ZSTD_decompressDCtx() :
* Same as ZSTD_decompress(),
* requires an allocated ZSTD_DCtx.
* Compatible with sticky parameters.
* Compatible with sticky parameters (see below).
*/
ZSTDLIB_API size_t ZSTD_decompressDCtx(ZSTD_DCtx* dctx,
void* dst, size_t dstCapacity,
@ -302,12 +302,12 @@ ZSTDLIB_API size_t ZSTD_decompressDCtx(ZSTD_DCtx* dctx,
* using ZSTD_CCtx_set*() functions.
* Pushed parameters are sticky : they are valid for next compressed frame, and any subsequent frame.
* "sticky" parameters are applicable to `ZSTD_compress2()` and `ZSTD_compressStream*()` !
* __They do not apply to "simple" one-shot variants such as ZSTD_compressCCtx()__ .
* __They do not apply to one-shot variants such as ZSTD_compressCCtx()__ .
*
* It's possible to reset all parameters to "default" using ZSTD_CCtx_reset().
*
* This API supersedes all other "advanced" API entry points in the experimental section.
* In the future, we expect to remove from experimental API entry points which are redundant with this API.
* In the future, we expect to remove API entry points from experimental which are redundant with this API.
*/
@ -390,6 +390,19 @@ typedef enum {
* The higher the value of selected strategy, the more complex it is,
* resulting in stronger and slower compression.
* Special: value 0 means "use default strategy". */
ZSTD_c_targetCBlockSize=130, /* v1.5.6+
* Attempts to fit compressed block size into approximatively targetCBlockSize.
* Bound by ZSTD_TARGETCBLOCKSIZE_MIN and ZSTD_TARGETCBLOCKSIZE_MAX.
* Note that it's not a guarantee, just a convergence target (default:0).
* No target when targetCBlockSize == 0.
* This is helpful in low bandwidth streaming environments to improve end-to-end latency,
* when a client can make use of partial documents (a prominent example being Chrome).
* Note: this parameter is stable since v1.5.6.
* It was present as an experimental parameter in earlier versions,
* but it's not recommended using it with earlier library versions
* due to massive performance regressions.
*/
/* LDM mode parameters */
ZSTD_c_enableLongDistanceMatching=160, /* Enable long distance matching.
* This parameter is designed to improve compression ratio
@ -469,7 +482,6 @@ typedef enum {
* ZSTD_c_forceMaxWindow
* ZSTD_c_forceAttachDict
* ZSTD_c_literalCompressionMode
* ZSTD_c_targetCBlockSize
* ZSTD_c_srcSizeHint
* ZSTD_c_enableDedicatedDictSearch
* ZSTD_c_stableInBuffer
@ -490,7 +502,7 @@ typedef enum {
ZSTD_c_experimentalParam3=1000,
ZSTD_c_experimentalParam4=1001,
ZSTD_c_experimentalParam5=1002,
ZSTD_c_experimentalParam6=1003,
/* was ZSTD_c_experimentalParam6=1003; is now ZSTD_c_targetCBlockSize */
ZSTD_c_experimentalParam7=1004,
ZSTD_c_experimentalParam8=1005,
ZSTD_c_experimentalParam9=1006,
@ -575,6 +587,7 @@ ZSTDLIB_API size_t ZSTD_CCtx_reset(ZSTD_CCtx* cctx, ZSTD_ResetDirective reset);
/*! ZSTD_compress2() :
* Behave the same as ZSTD_compressCCtx(), but compression parameters are set using the advanced API.
* (note that this entry point doesn't even expose a compression level parameter).
* ZSTD_compress2() always starts a new frame.
* Should cctx hold data from a previously unfinished frame, everything about it is forgotten.
* - Compression parameters are pushed into CCtx before starting compression, using ZSTD_CCtx_set*()
@ -618,6 +631,7 @@ typedef enum {
* ZSTD_d_forceIgnoreChecksum
* ZSTD_d_refMultipleDDicts
* ZSTD_d_disableHuffmanAssembly
* ZSTD_d_maxBlockSize
* Because they are not stable, it's necessary to define ZSTD_STATIC_LINKING_ONLY to access them.
* note : never ever use experimentalParam? names directly
*/
@ -625,7 +639,8 @@ typedef enum {
ZSTD_d_experimentalParam2=1001,
ZSTD_d_experimentalParam3=1002,
ZSTD_d_experimentalParam4=1003,
ZSTD_d_experimentalParam5=1004
ZSTD_d_experimentalParam5=1004,
ZSTD_d_experimentalParam6=1005
} ZSTD_dParameter;
@ -680,14 +695,14 @@ typedef struct ZSTD_outBuffer_s {
* A ZSTD_CStream object is required to track streaming operation.
* Use ZSTD_createCStream() and ZSTD_freeCStream() to create/release resources.
* ZSTD_CStream objects can be reused multiple times on consecutive compression operations.
* It is recommended to re-use ZSTD_CStream since it will play nicer with system's memory, by re-using already allocated memory.
* It is recommended to reuse ZSTD_CStream since it will play nicer with system's memory, by re-using already allocated memory.
*
* For parallel execution, use one separate ZSTD_CStream per thread.
*
* note : since v1.3.0, ZSTD_CStream and ZSTD_CCtx are the same thing.
*
* Parameters are sticky : when starting a new compression on the same context,
* it will re-use the same sticky parameters as previous compression session.
* it will reuse the same sticky parameters as previous compression session.
* When in doubt, it's recommended to fully initialize the context before usage.
* Use ZSTD_CCtx_reset() to reset the context and ZSTD_CCtx_setParameter(),
* ZSTD_CCtx_setPledgedSrcSize(), or ZSTD_CCtx_loadDictionary() and friends to
@ -776,6 +791,11 @@ typedef enum {
* only ZSTD_e_end or ZSTD_e_flush operations are allowed.
* Before starting a new compression job, or changing compression parameters,
* it is required to fully flush internal buffers.
* - note: if an operation ends with an error, it may leave @cctx in an undefined state.
* Therefore, it's UB to invoke ZSTD_compressStream2() of ZSTD_compressStream() on such a state.
* In order to be re-employed after an error, a state must be reset,
* which can be done explicitly (ZSTD_CCtx_reset()),
* or is sometimes implied by methods starting a new compression job (ZSTD_initCStream(), ZSTD_compressCCtx())
*/
ZSTDLIB_API size_t ZSTD_compressStream2( ZSTD_CCtx* cctx,
ZSTD_outBuffer* output,
@ -835,7 +855,7 @@ ZSTDLIB_API size_t ZSTD_endStream(ZSTD_CStream* zcs, ZSTD_outBuffer* output);
*
* A ZSTD_DStream object is required to track streaming operations.
* Use ZSTD_createDStream() and ZSTD_freeDStream() to create/release resources.
* ZSTD_DStream objects can be re-used multiple times.
* ZSTD_DStream objects can be reused multiple times.
*
* Use ZSTD_initDStream() to start a new decompression operation.
* @return : recommended first input size
@ -889,6 +909,12 @@ ZSTDLIB_API size_t ZSTD_initDStream(ZSTD_DStream* zds);
* @return : 0 when a frame is completely decoded and fully flushed,
* or an error code, which can be tested using ZSTD_isError(),
* or any other value > 0, which means there is some decoding or flushing to do to complete current frame.
*
* Note: when an operation returns with an error code, the @zds state may be left in undefined state.
* It's UB to invoke `ZSTD_decompressStream()` on such a state.
* In order to re-use such a state, it must be first reset,
* which can be done explicitly (`ZSTD_DCtx_reset()`),
* or is implied for operations starting some new decompression job (`ZSTD_initDStream`, `ZSTD_decompressDCtx()`, `ZSTD_decompress_usingDict()`)
*/
ZSTDLIB_API size_t ZSTD_decompressStream(ZSTD_DStream* zds, ZSTD_outBuffer* output, ZSTD_inBuffer* input);
@ -1021,7 +1047,7 @@ ZSTDLIB_API unsigned ZSTD_getDictID_fromFrame(const void* src, size_t srcSize);
*
* This API allows dictionaries to be used with ZSTD_compress2(),
* ZSTD_compressStream2(), and ZSTD_decompressDCtx().
* Dictionaries are sticky, they remain valid when same context is re-used,
* Dictionaries are sticky, they remain valid when same context is reused,
* they only reset when the context is reset
* with ZSTD_reset_parameters or ZSTD_reset_session_and_parameters.
* In contrast, Prefixes are single-use.
@ -1239,7 +1265,7 @@ ZSTDLIB_API size_t ZSTD_sizeof_DDict(const ZSTD_DDict* ddict);
#define ZSTD_LDM_HASHRATELOG_MAX (ZSTD_WINDOWLOG_MAX - ZSTD_HASHLOG_MIN)
/* Advanced parameter bounds */
#define ZSTD_TARGETCBLOCKSIZE_MIN 64
#define ZSTD_TARGETCBLOCKSIZE_MIN 1340 /* suitable to fit into an ethernet / wifi / 4G transport frame */
#define ZSTD_TARGETCBLOCKSIZE_MAX ZSTD_BLOCKSIZE_MAX
#define ZSTD_SRCSIZEHINT_MIN 0
#define ZSTD_SRCSIZEHINT_MAX INT_MAX
@ -1527,21 +1553,34 @@ typedef enum {
ZSTDLIB_STATIC_API size_t ZSTD_sequenceBound(size_t srcSize);
/*! ZSTD_generateSequences() :
* WARNING: This function is meant for debugging and informational purposes ONLY!
* Its implementation is flawed, and it will be deleted in a future version.
* It is not guaranteed to succeed, as there are several cases where it will give
* up and fail. You should NOT use this function in production code.
*
* This function is deprecated, and will be removed in a future version.
*
* Generate sequences using ZSTD_compress2(), given a source buffer.
*
* @param zc The compression context to be used for ZSTD_compress2(). Set any
* compression parameters you need on this context.
* @param outSeqs The output sequences buffer of size @p outSeqsSize
* @param outSeqsSize The size of the output sequences buffer.
* ZSTD_sequenceBound(srcSize) is an upper bound on the number
* of sequences that can be generated.
* @param src The source buffer to generate sequences from of size @p srcSize.
* @param srcSize The size of the source buffer.
*
* Each block will end with a dummy sequence
* with offset == 0, matchLength == 0, and litLength == length of last literals.
* litLength may be == 0, and if so, then the sequence of (of: 0 ml: 0 ll: 0)
* simply acts as a block delimiter.
*
* @zc can be used to insert custom compression params.
* This function invokes ZSTD_compress2().
*
* The output of this function can be fed into ZSTD_compressSequences() with CCtx
* setting of ZSTD_c_blockDelimiters as ZSTD_sf_explicitBlockDelimiters
* @return : number of sequences generated
* @returns The number of sequences generated, necessarily less than
* ZSTD_sequenceBound(srcSize), or an error code that can be checked
* with ZSTD_isError().
*/
ZSTD_DEPRECATED("For debugging only, will be replaced by ZSTD_extractSequences()")
ZSTDLIB_STATIC_API size_t
ZSTD_generateSequences(ZSTD_CCtx* zc,
ZSTD_Sequence* outSeqs, size_t outSeqsSize,
@ -1640,56 +1679,59 @@ ZSTDLIB_API unsigned ZSTD_isSkippableFrame(const void* buffer, size_t size);
/*! ZSTD_estimate*() :
* These functions make it possible to estimate memory usage
* of a future {D,C}Ctx, before its creation.
* This is useful in combination with ZSTD_initStatic(),
* which makes it possible to employ a static buffer for ZSTD_CCtx* state.
*
* ZSTD_estimateCCtxSize() will provide a memory budget large enough
* for any compression level up to selected one.
* Note : Unlike ZSTD_estimateCStreamSize*(), this estimate
* does not include space for a window buffer.
* Therefore, the estimation is only guaranteed for single-shot compressions, not streaming.
* to compress data of any size using one-shot compression ZSTD_compressCCtx() or ZSTD_compress2()
* associated with any compression level up to max specified one.
* The estimate will assume the input may be arbitrarily large,
* which is the worst case.
*
* Note that the size estimation is specific for one-shot compression,
* it is not valid for streaming (see ZSTD_estimateCStreamSize*())
* nor other potential ways of using a ZSTD_CCtx* state.
*
* When srcSize can be bound by a known and rather "small" value,
* this fact can be used to provide a tighter estimation
* because the CCtx compression context will need less memory.
* This tighter estimation can be provided by more advanced functions
* this knowledge can be used to provide a tighter budget estimation
* because the ZSTD_CCtx* state will need less memory for small inputs.
* This tighter estimation can be provided by employing more advanced functions
* ZSTD_estimateCCtxSize_usingCParams(), which can be used in tandem with ZSTD_getCParams(),
* and ZSTD_estimateCCtxSize_usingCCtxParams(), which can be used in tandem with ZSTD_CCtxParams_setParameter().
* Both can be used to estimate memory using custom compression parameters and arbitrary srcSize limits.
*
* Note : only single-threaded compression is supported.
* ZSTD_estimateCCtxSize_usingCCtxParams() will return an error code if ZSTD_c_nbWorkers is >= 1.
*
* Note 2 : ZSTD_estimateCCtxSize* functions are not compatible with the Block-Level Sequence Producer API at this time.
* Size estimates assume that no external sequence producer is registered.
*/
ZSTDLIB_STATIC_API size_t ZSTD_estimateCCtxSize(int compressionLevel);
ZSTDLIB_STATIC_API size_t ZSTD_estimateCCtxSize(int maxCompressionLevel);
ZSTDLIB_STATIC_API size_t ZSTD_estimateCCtxSize_usingCParams(ZSTD_compressionParameters cParams);
ZSTDLIB_STATIC_API size_t ZSTD_estimateCCtxSize_usingCCtxParams(const ZSTD_CCtx_params* params);
ZSTDLIB_STATIC_API size_t ZSTD_estimateDCtxSize(void);
/*! ZSTD_estimateCStreamSize() :
* ZSTD_estimateCStreamSize() will provide a budget large enough for any compression level up to selected one.
* It will also consider src size to be arbitrarily "large", which is worst case.
* ZSTD_estimateCStreamSize() will provide a memory budget large enough for streaming compression
* using any compression level up to the max specified one.
* It will also consider src size to be arbitrarily "large", which is a worst case scenario.
* If srcSize is known to always be small, ZSTD_estimateCStreamSize_usingCParams() can provide a tighter estimation.
* ZSTD_estimateCStreamSize_usingCParams() can be used in tandem with ZSTD_getCParams() to create cParams from compressionLevel.
* ZSTD_estimateCStreamSize_usingCCtxParams() can be used in tandem with ZSTD_CCtxParams_setParameter(). Only single-threaded compression is supported. This function will return an error code if ZSTD_c_nbWorkers is >= 1.
* Note : CStream size estimation is only correct for single-threaded compression.
* ZSTD_DStream memory budget depends on window Size.
* ZSTD_estimateCStreamSize_usingCCtxParams() will return an error code if ZSTD_c_nbWorkers is >= 1.
* Note 2 : ZSTD_estimateCStreamSize* functions are not compatible with the Block-Level Sequence Producer API at this time.
* Size estimates assume that no external sequence producer is registered.
*
* ZSTD_DStream memory budget depends on frame's window Size.
* This information can be passed manually, using ZSTD_estimateDStreamSize,
* or deducted from a valid frame Header, using ZSTD_estimateDStreamSize_fromFrame();
* Any frame requesting a window size larger than max specified one will be rejected.
* Note : if streaming is init with function ZSTD_init?Stream_usingDict(),
* an internal ?Dict will be created, which additional size is not estimated here.
* In this case, get total size by adding ZSTD_estimate?DictSize
* Note 2 : only single-threaded compression is supported.
* ZSTD_estimateCStreamSize_usingCCtxParams() will return an error code if ZSTD_c_nbWorkers is >= 1.
* Note 3 : ZSTD_estimateCStreamSize* functions are not compatible with the Block-Level Sequence Producer API at this time.
* Size estimates assume that no external sequence producer is registered.
*/
ZSTDLIB_STATIC_API size_t ZSTD_estimateCStreamSize(int compressionLevel);
ZSTDLIB_STATIC_API size_t ZSTD_estimateCStreamSize(int maxCompressionLevel);
ZSTDLIB_STATIC_API size_t ZSTD_estimateCStreamSize_usingCParams(ZSTD_compressionParameters cParams);
ZSTDLIB_STATIC_API size_t ZSTD_estimateCStreamSize_usingCCtxParams(const ZSTD_CCtx_params* params);
ZSTDLIB_STATIC_API size_t ZSTD_estimateDStreamSize(size_t windowSize);
ZSTDLIB_STATIC_API size_t ZSTD_estimateDStreamSize(size_t maxWindowSize);
ZSTDLIB_STATIC_API size_t ZSTD_estimateDStreamSize_fromFrame(const void* src, size_t srcSize);
/*! ZSTD_estimate?DictSize() :
@ -1946,11 +1988,6 @@ ZSTDLIB_STATIC_API size_t ZSTD_CCtx_refPrefix_advanced(ZSTD_CCtx* cctx, const vo
*/
#define ZSTD_c_literalCompressionMode ZSTD_c_experimentalParam5
/* Tries to fit compressed block size to be around targetCBlockSize.
* No target when targetCBlockSize == 0.
* There is no guarantee on compressed block size (default:0) */
#define ZSTD_c_targetCBlockSize ZSTD_c_experimentalParam6
/* User's best guess of source size.
* Hint is not valid when srcSizeHint == 0.
* There is no guarantee that hint is close to actual source size,
@ -2430,6 +2467,22 @@ ZSTDLIB_STATIC_API size_t ZSTD_DCtx_getParameter(ZSTD_DCtx* dctx, ZSTD_dParamete
*/
#define ZSTD_d_disableHuffmanAssembly ZSTD_d_experimentalParam5
/* ZSTD_d_maxBlockSize
* Allowed values are between 1KB and ZSTD_BLOCKSIZE_MAX (128KB).
* The default is ZSTD_BLOCKSIZE_MAX, and setting to 0 will set to the default.
*
* Forces the decompressor to reject blocks whose content size is
* larger than the configured maxBlockSize. When maxBlockSize is
* larger than the windowSize, the windowSize is used instead.
* This saves memory on the decoder when you know all blocks are small.
*
* This option is typically used in conjunction with ZSTD_c_maxBlockSize.
*
* WARNING: This causes the decoder to reject otherwise valid frames
* that have block sizes larger than the configured maxBlockSize.
*/
#define ZSTD_d_maxBlockSize ZSTD_d_experimentalParam6
/*! ZSTD_DCtx_setFormat() :
* This function is REDUNDANT. Prefer ZSTD_DCtx_setParameter().
@ -2557,7 +2610,7 @@ size_t ZSTD_initCStream_usingCDict_advanced(ZSTD_CStream* zcs,
* explicitly specified.
*
* start a new frame, using same parameters from previous frame.
* This is typically useful to skip dictionary loading stage, since it will re-use it in-place.
* This is typically useful to skip dictionary loading stage, since it will reuse it in-place.
* Note that zcs must be init at least once before using ZSTD_resetCStream().
* If pledgedSrcSize is not known at reset time, use macro ZSTD_CONTENTSIZE_UNKNOWN.
* If pledgedSrcSize > 0, its value must be correct, as it will be written in header, and controlled at the end.
@ -2633,7 +2686,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_initDStream_usingDDict(ZSTD_DStream* zds, const Z
*
* ZSTD_DCtx_reset(zds, ZSTD_reset_session_only);
*
* re-use decompression parameters from previous init; saves dictionary loading
* reuse decompression parameters from previous init; saves dictionary loading
*/
ZSTD_DEPRECATED("use ZSTD_DCtx_reset, see zstd.h for detailed instructions")
ZSTDLIB_STATIC_API size_t ZSTD_resetDStream(ZSTD_DStream* zds);
@ -2765,7 +2818,7 @@ ZSTDLIB_STATIC_API size_t ZSTD_resetDStream(ZSTD_DStream* zds);
#define ZSTD_SEQUENCE_PRODUCER_ERROR ((size_t)(-1))
typedef size_t ZSTD_sequenceProducer_F (
typedef size_t (*ZSTD_sequenceProducer_F) (
void* sequenceProducerState,
ZSTD_Sequence* outSeqs, size_t outSeqsCapacity,
const void* src, size_t srcSize,
@ -2797,7 +2850,23 @@ ZSTDLIB_STATIC_API void
ZSTD_registerSequenceProducer(
ZSTD_CCtx* cctx,
void* sequenceProducerState,
ZSTD_sequenceProducer_F* sequenceProducer
ZSTD_sequenceProducer_F sequenceProducer
);
/*! ZSTD_CCtxParams_registerSequenceProducer() :
* Same as ZSTD_registerSequenceProducer(), but operates on ZSTD_CCtx_params.
* This is used for accurate size estimation with ZSTD_estimateCCtxSize_usingCCtxParams(),
* which is needed when creating a ZSTD_CCtx with ZSTD_initStaticCCtx().
*
* If you are using the external sequence producer API in a scenario where ZSTD_initStaticCCtx()
* is required, then this function is for you. Otherwise, you probably don't need it.
*
* See tests/zstreamtest.c for example usage. */
ZSTDLIB_STATIC_API void
ZSTD_CCtxParams_registerSequenceProducer(
ZSTD_CCtx_params* params,
void* sequenceProducerState,
ZSTD_sequenceProducer_F sequenceProducer
);
@ -2820,7 +2889,7 @@ ZSTD_registerSequenceProducer(
A ZSTD_CCtx object is required to track streaming operations.
Use ZSTD_createCCtx() / ZSTD_freeCCtx() to manage resource.
ZSTD_CCtx object can be re-used multiple times within successive compression operations.
ZSTD_CCtx object can be reused multiple times within successive compression operations.
Start by initializing a context.
Use ZSTD_compressBegin(), or ZSTD_compressBegin_usingDict() for dictionary compression.
@ -2841,7 +2910,7 @@ ZSTD_registerSequenceProducer(
It's possible to use srcSize==0, in which case, it will write a final empty block to end the frame.
Without last block mark, frames are considered unfinished (hence corrupted) by compliant decoders.
`ZSTD_CCtx` object can be re-used (ZSTD_compressBegin()) to compress again.
`ZSTD_CCtx` object can be reused (ZSTD_compressBegin()) to compress again.
*/
/*===== Buffer-less streaming compression functions =====*/
@ -2873,7 +2942,7 @@ size_t ZSTD_compressBegin_usingCDict_advanced(ZSTD_CCtx* const cctx, const ZSTD_
A ZSTD_DCtx object is required to track streaming operations.
Use ZSTD_createDCtx() / ZSTD_freeDCtx() to manage it.
A ZSTD_DCtx object can be re-used multiple times.
A ZSTD_DCtx object can be reused multiple times.
First typical operation is to retrieve frame parameters, using ZSTD_getFrameHeader().
Frame header is extracted from the beginning of compressed frame, so providing only the frame's beginning is enough.