33ad474c45
This adds predefined macros for integer constants to implement section 7.18.4 of ISO/IEC 9899:1999 in `<stdint.h>` in a safe way:
```
__INT8_C(c)
__INT16_C(c)
__INT32_C(c)
__INT64_C(c)
__INTMAX_C(c)
__UINT8_C(c)
__UINT16_C(c)
__UINT32_C(c)
__UINT64_C(c)
__UINTMAX_C(c)
```
Which improves compatibility with GCC and makes it trivial to implement
section 7.18.4 of ISO/IEC 9899:1999.
Clang defines `__INT<N>_C_SUFFIX__`, `__UINT<N>_C_SUFFIX__`,
`__INTAX_C_SUFFIX__` and `__UINTMAX_C_SUFFIX__`, but these macros are
useless for this purpose.
Let's say, for example, that `__INT64_C_SUFFIX__` expands to `L` or
`LL`. If the user defines them as a macros, the compiler will produce
errors if `INT64_C` is implemented in `<stdint.h>` using
`__INT64_C_SUFFIX__`:
**minimal-test.c:**
```cpp
#if defined(__clang__) & !defined(__INT64_C)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wreserved-identifier"
# define __PSTDC_INT_C_(literal, suffix) literal##suffix
# define __PSTDC_INT_C(literal, suffix) __PSTDC_INT_C_(literal, suffix)
# define INT64_C(literal) __PSTDC_INT_C(literal, __INT64_C_SUFFIX__)
# pragma clang diagnostic pop
#elif defined(__GNUC__)
# define INT64_C __INT64_C
#endif
typedef __INT64_TYPE__ int64_t;
#define L "Make Clang produce an error"
#define LL "Make Clang produce an error"
int main(int argc, char **argv)
{
(void)argc; (void)argv;
int64_t v = INT64_C(9223372036854775807);
(void)v;
return 0;
}
```
<img width="697" alt="imagen"
src="https://github.com/user-attachments/assets/6df97af6-7cfd-4cf9-85b7-d7c854509325"
/>
**test.c:**
```cpp
#if defined(__clang__) && !defined(__INT8_C)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wreserved-identifier"
# define __PSTDC_INT_C_(literal, suffix) literal##suffix
# define __PSTDC_INT_C(literal, suffix) __PSTDC_INT_C_(literal, suffix)
# define INT8_C(literal) __PSTDC_INT_C(literal, __INT8_C_SUFFIX__)
# define INT16_C(literal) __PSTDC_INT_C(literal, __INT16_C_SUFFIX__)
# define INT32_C(literal) __PSTDC_INT_C(literal, __INT32_C_SUFFIX__)
# define INT64_C(literal) __PSTDC_INT_C(literal, __INT64_C_SUFFIX__)
# define INTMAX_C(literal) __PSTDC_INT_C(literal, __INTMAX_C_SUFFIX__)
# define UINT8_C(literal) __PSTDC_INT_C(literal, __UINT8_C_SUFFIX__)
# define UINT16_C(literal) __PSTDC_INT_C(literal, __UINT16_C_SUFFIX__)
# define UINT32_C(literal) __PSTDC_INT_C(literal, __UINT32_C_SUFFIX__)
# define UINT64_C(literal) __PSTDC_INT_C(literal, __UINT64_C_SUFFIX__)
# define UINTMAX_C(literal) __PSTDC_INT_C(literal, __UINTMAX_C_SUFFIX__)
# pragma clang diagnostic pop
#else
# define INT8_C __INT8_C
# define INT16_C __INT16_C
# define INT32_C __INT32_C
# define INT64_C __INT64_C
# define INTMAX_C __INTMAX_C
# define UINT8_C __UINT8_C
# define UINT16_C __UINT16_C
# define UINT32_C __UINT32_C
# define UINT64_C __UINT64_C
# define UINTMAX_C __UINTMAX_C
#endif
typedef __INT8_TYPE__ int8_t;
typedef __INT16_TYPE__ int16_t;
typedef __INT32_TYPE__ int32_t;
typedef __INT64_TYPE__ int64_t;
typedef __INTMAX_TYPE__ intmax_t;
typedef __UINT8_TYPE__ uint8_t;
typedef __UINT16_TYPE__ uint16_t;
typedef __UINT32_TYPE__ uint32_t;
typedef __UINT64_TYPE__ uint64_t;
typedef __UINTMAX_TYPE__ uintmax_t;
#define L "Make Clang produce an error"
#define LL "Make Clang produce an error"
#define U "Make Clang produce an error"
#define UL "Make Clang produce an error"
#define ULL "Make Clang produce an error"
int main(int argc, char **argv)
{
(void)argc; (void)argv;
int8_t a = INT8_C (127);
int16_t b = INT16_C (32767);
int32_t c = INT32_C (2147483647);
int64_t d = INT64_C (9223372036854775807);
intmax_t e = INTMAX_C (9223372036854775807);
uint8_t f = UINT8_C (255);
uint16_t g = UINT16_C (65535);
uint32_t h = UINT32_C (4294967295);
uint64_t i = UINT64_C (18446744073709551615);
uintmax_t j = UINTMAX_C(18446744073709551615);
(void)a; (void)b; (void)c; (void)d; (void)e;
(void)f; (void)g; (void)h; (void)i; (void)j;
return 0;
}
```
222 lines
9.3 KiB
C
222 lines
9.3 KiB
C
// RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=csky < /dev/null \
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// RUN: | FileCheck -match-full-lines -check-prefix=CSKY %s
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// RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=csky-unknown-linux < /dev/null \
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// RUN: | FileCheck -match-full-lines -check-prefixes=CSKY,CSKY-LINUX %s
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// RUN: %clang_cc1 -E -dM -ffreestanding -fgnuc-version=4.2.1 -triple=csky \
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// RUN: -fforce-enable-int128 < /dev/null | FileCheck -match-full-lines \
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// RUN: -check-prefixes=CSKY,CSKY-INT128 %s
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// CSKY: #define _ILP32 1
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// CSKY: #define __ATOMIC_ACQUIRE 2
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// CSKY: #define __ATOMIC_ACQ_REL 4
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// CSKY: #define __ATOMIC_CONSUME 1
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// CSKY: #define __ATOMIC_RELAXED 0
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// CSKY: #define __ATOMIC_RELEASE 3
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// CSKY: #define __ATOMIC_SEQ_CST 5
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// CSKY: #define __BIGGEST_ALIGNMENT__ 4
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// CSKY: #define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
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// CSKY: #define __CHAR16_TYPE__ unsigned short
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// CSKY: #define __CHAR32_TYPE__ unsigned int
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// CSKY: #define __CHAR_BIT__ 8
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// CSKY: #define __DBL_DECIMAL_DIG__ 17
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// CSKY: #define __DBL_DENORM_MIN__ 4.9406564584124654e-324
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// CSKY: #define __DBL_DIG__ 15
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// CSKY: #define __DBL_EPSILON__ 2.2204460492503131e-16
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// CSKY: #define __DBL_HAS_DENORM__ 1
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// CSKY: #define __DBL_HAS_INFINITY__ 1
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// CSKY: #define __DBL_HAS_QUIET_NAN__ 1
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// CSKY: #define __DBL_MANT_DIG__ 53
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// CSKY: #define __DBL_MAX_10_EXP__ 308
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// CSKY: #define __DBL_MAX_EXP__ 1024
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// CSKY: #define __DBL_MAX__ 1.7976931348623157e+308
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// CSKY: #define __DBL_MIN_10_EXP__ (-307)
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// CSKY: #define __DBL_MIN_EXP__ (-1021)
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// CSKY: #define __DBL_MIN__ 2.2250738585072014e-308
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// CSKY: #define __DECIMAL_DIG__ __LDBL_DECIMAL_DIG__
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// CSKY: #define __ELF__ 1
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// CSKY: #define __FINITE_MATH_ONLY__ 0
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// CSKY: #define __FLT_DECIMAL_DIG__ 9
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// CSKY: #define __FLT_DENORM_MIN__ 1.40129846e-45F
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// CSKY: #define __FLT_DIG__ 6
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// CSKY: #define __FLT_EPSILON__ 1.19209290e-7F
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// CSKY: #define __FLT_HAS_DENORM__ 1
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// CSKY: #define __FLT_HAS_INFINITY__ 1
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// CSKY: #define __FLT_HAS_QUIET_NAN__ 1
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// CSKY: #define __FLT_MANT_DIG__ 24
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// CSKY: #define __FLT_MAX_10_EXP__ 38
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// CSKY: #define __FLT_MAX_EXP__ 128
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// CSKY: #define __FLT_MAX__ 3.40282347e+38F
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// CSKY: #define __FLT_MIN_10_EXP__ (-37)
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// CSKY: #define __FLT_MIN_EXP__ (-125)
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// CSKY: #define __FLT_MIN__ 1.17549435e-38F
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// CSKY: #define __FLT_RADIX__ 2
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// CSKY: #define __GCC_ATOMIC_BOOL_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_CHAR_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_INT_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_LLONG_LOCK_FREE 1
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// CSKY: #define __GCC_ATOMIC_LONG_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_POINTER_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_SHORT_LOCK_FREE 2
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// CSKY: #define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
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// CSKY: #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
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// CSKY: #define __GNUC_MINOR__ {{.*}}
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// CSKY: #define __GNUC_PATCHLEVEL__ {{.*}}
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// CSKY: #define __GNUC_STDC_INLINE__ 1
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// CSKY: #define __GNUC__ {{.*}}
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// CSKY: #define __GXX_ABI_VERSION {{.*}}
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// CSKY: #define __ILP32__ 1
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// CSKY: #define __INT16_C(c) c
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// CSKY: #define __INT16_C_SUFFIX__
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// CSKY: #define __INT16_MAX__ 32767
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// CSKY: #define __INT16_TYPE__ short
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// CSKY: #define __INT32_C(c) c
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// CSKY: #define __INT32_C_SUFFIX__
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// CSKY: #define __INT32_MAX__ 2147483647
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// CSKY: #define __INT32_TYPE__ int
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// CSKY: #define __INT64_C(c) c##LL
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// CSKY: #define __INT64_C_SUFFIX__ LL
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// CSKY: #define __INT64_MAX__ 9223372036854775807LL
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// CSKY: #define __INT64_TYPE__ long long int
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// CSKY: #define __INT8_C(c) c
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// CSKY: #define __INT8_C_SUFFIX__
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// CSKY: #define __INT8_MAX__ 127
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// CSKY: #define __INT8_TYPE__ signed char
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// CSKY: #define __INTMAX_C(c) c##LL
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// CSKY: #define __INTMAX_C_SUFFIX__ LL
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// CSKY: #define __INTMAX_MAX__ 9223372036854775807LL
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// CSKY: #define __INTMAX_TYPE__ long long int
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// CSKY: #define __INTMAX_WIDTH__ 64
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// CSKY: #define __INTPTR_MAX__ 2147483647
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// CSKY: #define __INTPTR_TYPE__ int
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// CSKY: #define __INTPTR_WIDTH__ 32
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// TODO: C-SKY GCC defines INT_FAST16 as int
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// CSKY: #define __INT_FAST16_MAX__ 32767
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// CSKY: #define __INT_FAST16_TYPE__ short
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// CSKY: #define __INT_FAST32_MAX__ 2147483647
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// CSKY: #define __INT_FAST32_TYPE__ int
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// CSKY: #define __INT_FAST64_MAX__ 9223372036854775807LL
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// CSKY: #define __INT_FAST64_TYPE__ long long int
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// TODO: C-SKY GCC defines INT_FAST8 as int
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// CSKY: #define __INT_FAST8_MAX__ 127
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// CSKY: #define __INT_FAST8_TYPE__ signed char
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// CSKY: #define __INT_LEAST16_MAX__ 32767
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// CSKY: #define __INT_LEAST16_TYPE__ short
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// CSKY: #define __INT_LEAST32_MAX__ 2147483647
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// CSKY: #define __INT_LEAST32_TYPE__ int
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// CSKY: #define __INT_LEAST64_MAX__ 9223372036854775807LL
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// CSKY: #define __INT_LEAST64_TYPE__ long long int
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// CSKY: #define __INT_LEAST8_MAX__ 127
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// CSKY: #define __INT_LEAST8_TYPE__ signed char
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// CSKY: #define __INT_MAX__ 2147483647
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// CSKY: #define __LDBL_DECIMAL_DIG__ 17
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// CSKY: #define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L
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// CSKY: #define __LDBL_DIG__ 15
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// CSKY: #define __LDBL_EPSILON__ 2.2204460492503131e-16L
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// CSKY: #define __LDBL_HAS_DENORM__ 1
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// CSKY: #define __LDBL_HAS_INFINITY__ 1
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// CSKY: #define __LDBL_HAS_QUIET_NAN__ 1
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// CSKY: #define __LDBL_MANT_DIG__ 53
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// CSKY: #define __LDBL_MAX_10_EXP__ 308
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// CSKY: #define __LDBL_MAX_EXP__ 1024
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// CSKY: #define __LDBL_MAX__ 1.7976931348623157e+308L
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// CSKY: #define __LDBL_MIN_10_EXP__ (-307)
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// CSKY: #define __LDBL_MIN_EXP__ (-1021)
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// CSKY: #define __LDBL_MIN__ 2.2250738585072014e-308L
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// CSKY: #define __LITTLE_ENDIAN__ 1
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// CSKY: #define __LONG_LONG_MAX__ 9223372036854775807LL
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// CSKY: #define __LONG_MAX__ 2147483647L
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// CSKY: #define __NO_INLINE__ 1
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// CSKY: #define __POINTER_WIDTH__ 32
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// CSKY: #define __PRAGMA_REDEFINE_EXTNAME 1
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// CSKY: #define __PTRDIFF_MAX__ 2147483647
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// CSKY: #define __PTRDIFF_TYPE__ int
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// CSKY: #define __PTRDIFF_WIDTH__ 32
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// CSKY: #define __SCHAR_MAX__ 127
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// CSKY: #define __SHRT_MAX__ 32767
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// CSKY: #define __SIG_ATOMIC_MAX__ 2147483647
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// CSKY: #define __SIG_ATOMIC_WIDTH__ 32
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// CSKY: #define __SIZEOF_DOUBLE__ 8
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// CSKY: #define __SIZEOF_FLOAT__ 4
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// CSKY-INT128: #define __SIZEOF_INT128__ 16
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// CSKY: #define __SIZEOF_INT__ 4
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// CSKY: #define __SIZEOF_LONG_DOUBLE__ 8
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// CSKY: #define __SIZEOF_LONG_LONG__ 8
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// CSKY: #define __SIZEOF_LONG__ 4
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// CSKY: #define __SIZEOF_POINTER__ 4
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// CSKY: #define __SIZEOF_PTRDIFF_T__ 4
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// CSKY: #define __SIZEOF_SHORT__ 2
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// CSKY: #define __SIZEOF_SIZE_T__ 4
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// CSKY: #define __SIZEOF_WCHAR_T__ 4
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// CSKY: #define __SIZEOF_WINT_T__ 4
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// CSKY: #define __SIZE_MAX__ 4294967295U
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// CSKY: #define __SIZE_TYPE__ unsigned int
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// CSKY: #define __SIZE_WIDTH__ 32
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// CSKY: #define __STDC_HOSTED__ 0
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// CSKY: #define __STDC_UTF_16__ 1
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// CSKY: #define __STDC_UTF_32__ 1
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// CSKY: #define __STDC_VERSION__ 201710L
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// CSKY: #define __STDC__ 1
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// CSKY: #define __UINT16_C(c) c
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// CSKY: #define __UINT16_C_SUFFIX__
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// CSKY: #define __UINT16_MAX__ 65535
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// CSKY: #define __UINT16_TYPE__ unsigned short
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// CSKY: #define __UINT32_C(c) c##U
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// CSKY: #define __UINT32_C_SUFFIX__ U
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// CSKY: #define __UINT32_MAX__ 4294967295U
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// CSKY: #define __UINT32_TYPE__ unsigned int
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// CSKY: #define __UINT64_C(c) c##ULL
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// CSKY: #define __UINT64_C_SUFFIX__ ULL
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// CSKY: #define __UINT64_MAX__ 18446744073709551615ULL
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// CSKY: #define __UINT64_TYPE__ long long unsigned int
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// CSKY: #define __UINT8_C(c) c
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// CSKY: #define __UINT8_C_SUFFIX__
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// CSKY: #define __UINT8_MAX__ 255
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// CSKY: #define __UINT8_TYPE__ unsigned char
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// CSKY: #define __UINTMAX_C(c) c##ULL
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// CSKY: #define __UINTMAX_C_SUFFIX__ ULL
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// CSKY: #define __UINTMAX_MAX__ 18446744073709551615ULL
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// CSKY: #define __UINTMAX_TYPE__ long long unsigned int
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// CSKY: #define __UINTMAX_WIDTH__ 64
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// CSKY: #define __UINTPTR_MAX__ 4294967295U
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// CSKY: #define __UINTPTR_TYPE__ unsigned int
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// CSKY: #define __UINTPTR_WIDTH__ 32
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// TODO: C-SKY GCC defines UINT_FAST16 to be unsigned int
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// CSKY: #define __UINT_FAST16_MAX__ 65535
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// CSKY: #define __UINT_FAST16_TYPE__ unsigned short
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// CSKY: #define __UINT_FAST32_MAX__ 4294967295U
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// CSKY: #define __UINT_FAST32_TYPE__ unsigned int
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// CSKY: #define __UINT_FAST64_MAX__ 18446744073709551615ULL
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// CSKY: #define __UINT_FAST64_TYPE__ long long unsigned int
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// TODO: C-SKY GCC defines UINT_FAST8 to be unsigned int
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// CSKY: #define __UINT_FAST8_MAX__ 255
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// CSKY: #define __UINT_FAST8_TYPE__ unsigned char
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// CSKY: #define __UINT_LEAST16_MAX__ 65535
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// CSKY: #define __UINT_LEAST16_TYPE__ unsigned short
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// CSKY: #define __UINT_LEAST32_MAX__ 4294967295U
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// CSKY: #define __UINT_LEAST32_TYPE__ unsigned int
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// CSKY: #define __UINT_LEAST64_MAX__ 18446744073709551615ULL
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// CSKY: #define __UINT_LEAST64_TYPE__ long long unsigned int
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// CSKY: #define __UINT_LEAST8_MAX__ 255
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// CSKY: #define __UINT_LEAST8_TYPE__ unsigned char
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// CSKY: #define __USER_LABEL_PREFIX__
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// CSKY: #define __WCHAR_MAX__ 2147483647
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// CSKY: #define __WCHAR_TYPE__ int
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// CSKY: #define __WCHAR_WIDTH__ 32
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// CSKY: #define __WINT_TYPE__ unsigned int
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// CSKY: #define __WINT_UNSIGNED__ 1
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// CSKY: #define __WINT_WIDTH__ 32
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// CSKY: #define __ck810__ 1
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// CSKY: #define __ckcore__ 2
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// CSKY: #define __cskyLE__ 1
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// CSKY: #define __csky__ 2
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// CSKY: #define __cskyabi__ 2
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// CSKY: #define __cskyle__ 1
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// CSKY-LINUX: #define __gnu_linux__ 1
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// CSKY-LINUX: #define __linux 1
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// CSKY-LINUX: #define __linux__ 1
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// CSKY-LINUX: #define __unix 1
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// CSKY-LINUX: #define __unix__ 1
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// CSKY-LINUX: #define linux 1
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// CSKY-LINUX: #define unix 1
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