// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_STREAMBUF
#define _LIBCPP_STREAMBUF
/*
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 <__assert>
#include <__config>
#include <__fwd/streambuf.h>
#include <__locale>
#include <__type_traits/is_same.h>
#include <__utility/is_valid_range.h>
#include <climits>
#include <ios>
#include <iosfwd>
#include <version>
#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_HIDE_FROM_ABI_AFTER_V1 locale pubimbue(const locale& __loc) {
imbue(__loc);
locale __r = __loc_;
__loc_ = __loc;
return __r;
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 locale getloc() const { return __loc_; }
// 27.6.2.2.2 buffer and positioning:
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 basic_streambuf* pubsetbuf(char_type* __s, streamsize __n) {
return setbuf(__s, __n);
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 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_HIDE_FROM_ABI_AFTER_V1 pos_type
pubseekpos(pos_type __sp, ios_base::openmode __which = ios_base::in | ios_base::out) {
return seekpos(__sp, __which);
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 int pubsync() { return sync(); }
// Get and put areas:
// 27.6.2.2.3 Get area:
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 streamsize in_avail() {
if (__ninp_ < __einp_)
return static_cast<streamsize>(__einp_ - __ninp_);
return showmanyc();
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 int_type snextc() {
if (sbumpc() == traits_type::eof())
return traits_type::eof();
return sgetc();
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 int_type sbumpc() {
if (__ninp_ == __einp_)
return uflow();
return traits_type::to_int_type(*__ninp_++);
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 int_type sgetc() {
if (__ninp_ == __einp_)
return underflow();
return traits_type::to_int_type(*__ninp_);
}
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 streamsize sgetn(char_type* __s, streamsize __n) { return xsgetn(__s, __n); }
// 27.6.2.2.4 Putback:
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 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_HIDE_FROM_ABI_AFTER_V1 int_type sungetc() {
if (__binp_ == __ninp_)
return pbackfail();
return traits_type::to_int_type(*--__ninp_);
}
// 27.6.2.2.5 Put area:
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 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_HIDE_FROM_ABI_AFTER_V1 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_HIDE_FROM_ABI char_type* eback() const { return __binp_; }
_LIBCPP_HIDE_FROM_ABI char_type* gptr() const { return __ninp_; }
_LIBCPP_HIDE_FROM_ABI char_type* egptr() const { return __einp_; }
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 void gbump(int __n) { __ninp_ += __n; }
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 void setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) {
_LIBCPP_ASSERT_VALID_INPUT_RANGE(std::__is_valid_range(__gbeg, __gnext), "[gbeg, gnext) must be a valid range");
_LIBCPP_ASSERT_VALID_INPUT_RANGE(std::__is_valid_range(__gbeg, __gend), "[gbeg, gend) must be a valid range");
_LIBCPP_ASSERT_VALID_INPUT_RANGE(std::__is_valid_range(__gnext, __gend), "[gnext, gend) must be a valid range");
__binp_ = __gbeg;
__ninp_ = __gnext;
__einp_ = __gend;
}
// 27.6.2.3.3 Put area:
_LIBCPP_HIDE_FROM_ABI char_type* pbase() const { return __bout_; }
_LIBCPP_HIDE_FROM_ABI char_type* pptr() const { return __nout_; }
_LIBCPP_HIDE_FROM_ABI char_type* epptr() const { return __eout_; }
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 void pbump(int __n) { __nout_ += __n; }
_LIBCPP_HIDE_FROM_ABI void __pbump(streamsize __n) { __nout_ += __n; }
inline _LIBCPP_HIDE_FROM_ABI_AFTER_V1 void setp(char_type* __pbeg, char_type* __pend) {
_LIBCPP_ASSERT_VALID_INPUT_RANGE(std::__is_valid_range(__pbeg, __pend), "[pbeg, pend) must be a valid range");
__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_(nullptr), __ninp_(nullptr), __einp_(nullptr), __bout_(nullptr), __nout_(nullptr), __eout_(nullptr) {}
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) {
std::swap(__loc_, __sb.__loc_);
std::swap(__binp_, __sb.__binp_);
std::swap(__ninp_, __sb.__ninp_);
std::swap(__einp_, __sb.__einp_);
std::swap(__bout_, __sb.__bout_);
std::swap(__nout_, __sb.__nout_);
std::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 = std::min(static_cast<streamsize>(INT_MAX), std::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 = std::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();
}
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<char>;
#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS basic_streambuf<wchar_t>;
#endif
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
# include <cstdint>
#endif
#endif // _LIBCPP_STREAMBUF
Codebase Browser
llvm