shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
llvm-project/libcxx/include/streambuf
Louis Dionne dc7200b486 [libc++] Take 2: Replace uses of _LIBCPP_ALWAYS_INLINE by _LIBCPP_INLINE_VISIBILITY 
Summary:
We never actually mean to always inline a function -- all the uses of
the macro I could find are actually attempts to control the visibility
of symbols. This is better described by _LIBCPP_INLINE_VISIBILITY, which
is actually always defined the same.

This change is orthogonal to the decision of what we're actually going
to do with _LIBCPP_INLINE_VISIBILITY -- it just simplifies things by
having one canonical way of doing things.

Note that this commit had originally been applied in r336369 and then
reverted in r336382 because of unforeseen problems. Both of these problems
have now been fixed.

Reviewers: EricWF, mclow.lists

Subscribers: christof, dexonsmith, erikvanderpoel

Differential Revision: https://reviews.llvm.org/D48892

llvm-svn: 336866
2018-07-11 23:14:33 +00:00

502 lines
14 KiB
C++
Raw Blame History

// -*- C++ -*-
//===------------------------- streambuf ----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_STEAMBUF
#define _LIBCPP_STEAMBUF
/*
streambuf synopsis
namespace std
{
template <class charT, class traits = char_traits<charT> >
class basic_streambuf
{
public:
// types:
typedef charT char_type;
typedef traits traits_type;
typedef typename traits_type::int_type int_type;
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;
virtual ~basic_streambuf();
// 27.6.2.2.1 locales:
locale pubimbue(const locale& loc);
locale getloc() const;
// 27.6.2.2.2 buffer and positioning:
basic_streambuf* pubsetbuf(char_type* s, streamsize n);
pos_type pubseekoff(off_type off, ios_base::seekdir way,
ios_base::openmode which = ios_base::in | ios_base::out);
pos_type pubseekpos(pos_type sp,
ios_base::openmode which = ios_base::in | ios_base::out);
int pubsync();
// Get and put areas:
// 27.6.2.2.3 Get area:
streamsize in_avail();
int_type snextc();
int_type sbumpc();
int_type sgetc();
streamsize sgetn(char_type* s, streamsize n);
// 27.6.2.2.4 Putback:
int_type sputbackc(char_type c);
int_type sungetc();
// 27.6.2.2.5 Put area:
int_type sputc(char_type c);
streamsize sputn(const char_type* s, streamsize n);
protected:
basic_streambuf();
basic_streambuf(const basic_streambuf& rhs);
basic_streambuf& operator=(const basic_streambuf& rhs);
void swap(basic_streambuf& rhs);
// 27.6.2.3.2 Get area:
char_type* eback() const;
char_type* gptr() const;
char_type* egptr() const;
void gbump(int n);
void setg(char_type* gbeg, char_type* gnext, char_type* gend);
// 27.6.2.3.3 Put area:
char_type* pbase() const;
char_type* pptr() const;
char_type* epptr() const;
void pbump(int n);
void setp(char_type* pbeg, char_type* pend);
// 27.6.2.4 virtual functions:
// 27.6.2.4.1 Locales:
virtual void imbue(const locale& loc);
// 27.6.2.4.2 Buffer management and positioning:
virtual basic_streambuf* setbuf(char_type* s, streamsize n);
virtual pos_type seekoff(off_type off, ios_base::seekdir way,
ios_base::openmode which = ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type sp,
ios_base::openmode which = ios_base::in | ios_base::out);
virtual int sync();
// 27.6.2.4.3 Get area:
virtual streamsize showmanyc();
virtual streamsize xsgetn(char_type* s, streamsize n);
virtual int_type underflow();
virtual int_type uflow();
// 27.6.2.4.4 Putback:
virtual int_type pbackfail(int_type c = traits_type::eof());
// 27.6.2.4.5 Put area:
virtual streamsize xsputn(const char_type* s, streamsize n);
virtual int_type overflow (int_type c = traits_type::eof());
};
} // std
*/
#include <__config>
#include <iosfwd>
#include <ios>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_streambuf
{
public:
// types:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef typename traits_type::int_type int_type;
typedef typename traits_type::pos_type pos_type;
typedef typename traits_type::off_type off_type;
static_assert((is_same<_CharT, typename traits_type::char_type>::value),
"traits_type::char_type must be the same type as CharT");
virtual ~basic_streambuf();
// 27.6.2.2.1 locales:
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
locale pubimbue(const locale& __loc) {
imbue(__loc);
locale __r = __loc_;
__loc_ = __loc;
return __r;
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
locale getloc() const { return __loc_; }
// 27.6.2.2.2 buffer and positioning:
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
basic_streambuf* pubsetbuf(char_type* __s, streamsize __n)
{ return setbuf(__s, __n); }
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
pos_type pubseekoff(off_type __off, ios_base::seekdir __way,
ios_base::openmode __which = ios_base::in | ios_base::out)
{ return seekoff(__off, __way, __which); }
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
pos_type pubseekpos(pos_type __sp,
ios_base::openmode __which = ios_base::in | ios_base::out)
{ return seekpos(__sp, __which); }
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int pubsync() { return sync(); }
// Get and put areas:
// 27.6.2.2.3 Get area:
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
streamsize in_avail() {
if (__ninp_ < __einp_)
return static_cast<streamsize>(__einp_ - __ninp_);
return showmanyc();
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int_type snextc() {
if (sbumpc() == traits_type::eof())
return traits_type::eof();
return sgetc();
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int_type sbumpc() {
if (__ninp_ == __einp_)
return uflow();
return traits_type::to_int_type(*__ninp_++);
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int_type sgetc() {
if (__ninp_ == __einp_)
return underflow();
return traits_type::to_int_type(*__ninp_);
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
streamsize sgetn(char_type* __s, streamsize __n)
{ return xsgetn(__s, __n); }
// 27.6.2.2.4 Putback:
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int_type sputbackc(char_type __c) {
if (__binp_ == __ninp_ || !traits_type::eq(__c, __ninp_[-1]))
return pbackfail(traits_type::to_int_type(__c));
return traits_type::to_int_type(*--__ninp_);
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int_type sungetc() {
if (__binp_ == __ninp_)
return pbackfail();
return traits_type::to_int_type(*--__ninp_);
}
// 27.6.2.2.5 Put area:
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
int_type sputc(char_type __c) {
if (__nout_ == __eout_)
return overflow(traits_type::to_int_type(__c));
*__nout_++ = __c;
return traits_type::to_int_type(__c);
}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
streamsize sputn(const char_type* __s, streamsize __n)
{ return xsputn(__s, __n); }
protected:
basic_streambuf();
basic_streambuf(const basic_streambuf& __rhs);
basic_streambuf& operator=(const basic_streambuf& __rhs);
void swap(basic_streambuf& __rhs);
// 27.6.2.3.2 Get area:
_LIBCPP_INLINE_VISIBILITY char_type* eback() const {return __binp_;}
_LIBCPP_INLINE_VISIBILITY char_type* gptr() const {return __ninp_;}
_LIBCPP_INLINE_VISIBILITY char_type* egptr() const {return __einp_;}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
void gbump(int __n) { __ninp_ += __n; }
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) {
__binp_ = __gbeg;
__ninp_ = __gnext;
__einp_ = __gend;
}
// 27.6.2.3.3 Put area:
_LIBCPP_INLINE_VISIBILITY char_type* pbase() const {return __bout_;}
_LIBCPP_INLINE_VISIBILITY char_type* pptr() const {return __nout_;}
_LIBCPP_INLINE_VISIBILITY char_type* epptr() const {return __eout_;}
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
void pbump(int __n) { __nout_ += __n; }
_LIBCPP_INLINE_VISIBILITY
void __pbump(streamsize __n) { __nout_ += __n; }
inline _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
void setp(char_type* __pbeg, char_type* __pend) {
__bout_ = __nout_ = __pbeg;
__eout_ = __pend;
}
// 27.6.2.4 virtual functions:
// 27.6.2.4.1 Locales:
virtual void imbue(const locale& __loc);
// 27.6.2.4.2 Buffer management and positioning:
virtual basic_streambuf* setbuf(char_type* __s, streamsize __n);
virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
ios_base::openmode __which = ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type __sp,
ios_base::openmode __which = ios_base::in | ios_base::out);
virtual int sync();
// 27.6.2.4.3 Get area:
virtual streamsize showmanyc();
virtual streamsize xsgetn(char_type* __s, streamsize __n);
virtual int_type underflow();
virtual int_type uflow();
// 27.6.2.4.4 Putback:
virtual int_type pbackfail(int_type __c = traits_type::eof());
// 27.6.2.4.5 Put area:
virtual streamsize xsputn(const char_type* __s, streamsize __n);
virtual int_type overflow(int_type __c = traits_type::eof());
private:
locale __loc_;
char_type* __binp_;
char_type* __ninp_;
char_type* __einp_;
char_type* __bout_;
char_type* __nout_;
char_type* __eout_;
};
template <class _CharT, class _Traits>
basic_streambuf<_CharT, _Traits>::~basic_streambuf()
{
}
template <class _CharT, class _Traits>
basic_streambuf<_CharT, _Traits>::basic_streambuf()
: __binp_(0),
__ninp_(0),
__einp_(0),
__bout_(0),
__nout_(0),
__eout_(0)
{
}
template <class _CharT, class _Traits>
basic_streambuf<_CharT, _Traits>::basic_streambuf(const basic_streambuf& __sb)
: __loc_(__sb.__loc_),
__binp_(__sb.__binp_),
__ninp_(__sb.__ninp_),
__einp_(__sb.__einp_),
__bout_(__sb.__bout_),
__nout_(__sb.__nout_),
__eout_(__sb.__eout_)
{
}
template <class _CharT, class _Traits>
basic_streambuf<_CharT, _Traits>&
basic_streambuf<_CharT, _Traits>::operator=(const basic_streambuf& __sb)
{
__loc_ = __sb.__loc_;
__binp_ = __sb.__binp_;
__ninp_ = __sb.__ninp_;
__einp_ = __sb.__einp_;
__bout_ = __sb.__bout_;
__nout_ = __sb.__nout_;
__eout_ = __sb.__eout_;
return *this;
}
template <class _CharT, class _Traits>
void
basic_streambuf<_CharT, _Traits>::swap(basic_streambuf& __sb)
{
_VSTD::swap(__loc_, __sb.__loc_);
_VSTD::swap(__binp_, __sb.__binp_);
_VSTD::swap(__ninp_, __sb.__ninp_);
_VSTD::swap(__einp_, __sb.__einp_);
_VSTD::swap(__bout_, __sb.__bout_);
_VSTD::swap(__nout_, __sb.__nout_);
_VSTD::swap(__eout_, __sb.__eout_);
}
template <class _CharT, class _Traits>
void
basic_streambuf<_CharT, _Traits>::imbue(const locale&)
{
}
template <class _CharT, class _Traits>
basic_streambuf<_CharT, _Traits>*
basic_streambuf<_CharT, _Traits>::setbuf(char_type*, streamsize)
{
return this;
}
template <class _CharT, class _Traits>
typename basic_streambuf<_CharT, _Traits>::pos_type
basic_streambuf<_CharT, _Traits>::seekoff(off_type, ios_base::seekdir,
ios_base::openmode)
{
return pos_type(off_type(-1));
}
template <class _CharT, class _Traits>
typename basic_streambuf<_CharT, _Traits>::pos_type
basic_streambuf<_CharT, _Traits>::seekpos(pos_type, ios_base::openmode)
{
return pos_type(off_type(-1));
}
template <class _CharT, class _Traits>
int
basic_streambuf<_CharT, _Traits>::sync()
{
return 0;
}
template <class _CharT, class _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::showmanyc()
{
return 0;
}
template <class _CharT, class _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::xsgetn(char_type* __s, streamsize __n)
{
const int_type __eof = traits_type::eof();
int_type __c;
streamsize __i = 0;
while(__i < __n)
{
if (__ninp_ < __einp_)
{
const streamsize __len = _VSTD::min(static_cast<streamsize>(INT_MAX),
_VSTD::min(__einp_ - __ninp_, __n - __i));
traits_type::copy(__s, __ninp_, __len);
__s += __len;
__i += __len;
this->gbump(__len);
}
else if ((__c = uflow()) != __eof)
{
*__s = traits_type::to_char_type(__c);
++__s;
++__i;
}
else
break;
}
return __i;
}
template <class _CharT, class _Traits>
typename basic_streambuf<_CharT, _Traits>::int_type
basic_streambuf<_CharT, _Traits>::underflow()
{
return traits_type::eof();
}
template <class _CharT, class _Traits>
typename basic_streambuf<_CharT, _Traits>::int_type
basic_streambuf<_CharT, _Traits>::uflow()
{
if (underflow() == traits_type::eof())
return traits_type::eof();
return traits_type::to_int_type(*__ninp_++);
}
template <class _CharT, class _Traits>
typename basic_streambuf<_CharT, _Traits>::int_type
basic_streambuf<_CharT, _Traits>::pbackfail(int_type)
{
return traits_type::eof();
}
template <class _CharT, class _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::xsputn(const char_type* __s, streamsize __n)
{
streamsize __i = 0;
int_type __eof = traits_type::eof();
while( __i < __n)
{
if (__nout_ >= __eout_)
{
if (overflow(traits_type::to_int_type(*__s)) == __eof)
break;
++__s;
++__i;
}
else
{
streamsize __chunk_size = _VSTD::min(__eout_ - __nout_, __n - __i);
traits_type::copy(__nout_, __s, __chunk_size);
__nout_ += __chunk_size;
__s += __chunk_size;
__i += __chunk_size;
}
}
return __i;
}
template <class _CharT, class _Traits>
typename basic_streambuf<_CharT, _Traits>::int_type
basic_streambuf<_CharT, _Traits>::overflow(int_type)
{
return traits_type::eof();
}
#ifndef _LIBCPP_AVAILABILITY_NO_STREAMS_EXTERN_TEMPLATE
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<char>)
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<wchar_t>)
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<char>)
_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_ios<wchar_t>)
#endif
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP_STEAMBUF
Reference in New Issue View Git Blame Copy Permalink