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4a3529492c
darling-libcxx/include/fstream
Petr Hosek c0e405ec62 [libc++] Set __file_ to 0 in basic_filebuf::close() even if fclose fails 
This issue was detected by ASan in one of our tests. This test manually
invokes basic_filebuf::cloe(). fclose(__h.release() returned a non-zero
exit status, so __file_ wasn't set to 0. Later when basic_filebuf
destructor ran, we would enter the if (__file_) block again leading to
heap-use-after-free error.

The POSIX specification for fclose says that independently of the return
value, fclose closes the underlying file descriptor and any further
access (including another call to fclose()) to the stream results in
undefined behavior. This is exactly what happened in our test case.

To avoid this issue, we have to always set __file_ to 0 independently of
the fclose return value.

Differential Revision: https://reviews.llvm.org/D64979

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@366730 91177308-0d34-0410-b5e6-96231b3b80d8
2019-07-22 19:54:34 +00:00

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// -*- C++ -*-
//===------------------------- fstream ------------------------------------===//
//
// 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_FSTREAM
#define _LIBCPP_FSTREAM
/*
fstream synopsis
template <class charT, class traits = char_traits<charT> >
class basic_filebuf
: public basic_streambuf<charT, traits>
{
public:
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;
// 27.9.1.2 Constructors/destructor:
basic_filebuf();
basic_filebuf(basic_filebuf&& rhs);
virtual ~basic_filebuf();
// 27.9.1.3 Assign/swap:
basic_filebuf& operator=(basic_filebuf&& rhs);
void swap(basic_filebuf& rhs);
// 27.9.1.4 Members:
bool is_open() const;
basic_filebuf* open(const char* s, ios_base::openmode mode);
basic_filebuf* open(const string& s, ios_base::openmode mode);
basic_filebuf* open(const filesystem::path& p, ios_base::openmode mode); // C++17
basic_filebuf* close();
protected:
// 27.9.1.5 Overridden virtual functions:
virtual streamsize showmanyc();
virtual int_type underflow();
virtual int_type uflow();
virtual int_type pbackfail(int_type c = traits_type::eof());
virtual int_type overflow (int_type c = traits_type::eof());
virtual basic_streambuf<char_type, traits_type>* 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();
virtual void imbue(const locale& loc);
};
template <class charT, class traits>
void
swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y);
typedef basic_filebuf<char> filebuf;
typedef basic_filebuf<wchar_t> wfilebuf;
template <class charT, class traits = char_traits<charT> >
class basic_ifstream
: public basic_istream<charT,traits>
{
public:
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;
basic_ifstream();
explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in);
explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in);
explicit basic_ifstream(const filesystem::path& p,
ios_base::openmode mode = ios_base::in); // C++17
basic_ifstream(basic_ifstream&& rhs);
basic_ifstream& operator=(basic_ifstream&& rhs);
void swap(basic_ifstream& rhs);
basic_filebuf<char_type, traits_type>* rdbuf() const;
bool is_open() const;
void open(const char* s, ios_base::openmode mode = ios_base::in);
void open(const string& s, ios_base::openmode mode = ios_base::in);
void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in); // C++17
void close();
};
template <class charT, class traits>
void
swap(basic_ifstream<charT, traits>& x, basic_ifstream<charT, traits>& y);
typedef basic_ifstream<char> ifstream;
typedef basic_ifstream<wchar_t> wifstream;
template <class charT, class traits = char_traits<charT> >
class basic_ofstream
: public basic_ostream<charT,traits>
{
public:
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;
basic_ofstream();
explicit basic_ofstream(const char* s, ios_base::openmode mode = ios_base::out);
explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out);
explicit basic_ofstream(const filesystem::path& p,
ios_base::openmode mode = ios_base::out); // C++17
basic_ofstream(basic_ofstream&& rhs);
basic_ofstream& operator=(basic_ofstream&& rhs);
void swap(basic_ofstream& rhs);
basic_filebuf<char_type, traits_type>* rdbuf() const;
bool is_open() const;
void open(const char* s, ios_base::openmode mode = ios_base::out);
void open(const string& s, ios_base::openmode mode = ios_base::out);
void open(const filesystem::path& p,
ios_base::openmode mode = ios_base::out); // C++17
void close();
};
template <class charT, class traits>
void
swap(basic_ofstream<charT, traits>& x, basic_ofstream<charT, traits>& y);
typedef basic_ofstream<char> ofstream;
typedef basic_ofstream<wchar_t> wofstream;
template <class charT, class traits=char_traits<charT> >
class basic_fstream
: public basic_iostream<charT,traits>
{
public:
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;
basic_fstream();
explicit basic_fstream(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out);
explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out);
explicit basic_fstream(const filesystem::path& p,
ios_base::openmode mode = ios_base::in|ios_base::out); C++17
basic_fstream(basic_fstream&& rhs);
basic_fstream& operator=(basic_fstream&& rhs);
void swap(basic_fstream& rhs);
basic_filebuf<char_type, traits_type>* rdbuf() const;
bool is_open() const;
void open(const char* s, ios_base::openmode mode = ios_base::in|ios_base::out);
void open(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out);
void open(const filesystem::path& s,
ios_base::openmode mode = ios_base::in|ios_base::out); // C++17
void close();
};
template <class charT, class traits>
void swap(basic_fstream<charT, traits>& x, basic_fstream<charT, traits>& y);
typedef basic_fstream<char> fstream;
typedef basic_fstream<wchar_t> wfstream;
} // std
*/
#include <__config>
#include <ostream>
#include <istream>
#include <__locale>
#include <cstdio>
#include <cstdlib>
#include <filesystem>
#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_filebuf
: public basic_streambuf<_CharT, _Traits>
{
public:
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;
typedef typename traits_type::state_type state_type;
// 27.9.1.2 Constructors/destructor:
basic_filebuf();
#ifndef _LIBCPP_CXX03_LANG
basic_filebuf(basic_filebuf&& __rhs);
#endif
virtual ~basic_filebuf();
// 27.9.1.3 Assign/swap:
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
basic_filebuf& operator=(basic_filebuf&& __rhs);
#endif
void swap(basic_filebuf& __rhs);
// 27.9.1.4 Members:
_LIBCPP_INLINE_VISIBILITY
bool is_open() const;
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
basic_filebuf* open(const char* __s, ios_base::openmode __mode);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
basic_filebuf* open(const wchar_t* __s, ios_base::openmode __mode);
#endif
_LIBCPP_INLINE_VISIBILITY
basic_filebuf* open(const string& __s, ios_base::openmode __mode);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
basic_filebuf* open(const _VSTD_FS::path& __p, ios_base::openmode __mode) {
return open(__p.c_str(), __mode);
}
#endif
_LIBCPP_INLINE_VISIBILITY
basic_filebuf* __open(int __fd, ios_base::openmode __mode);
#endif
basic_filebuf* close();
_LIBCPP_INLINE_VISIBILITY
inline static const char*
__make_mdstring(ios_base::openmode __mode) _NOEXCEPT;
protected:
// 27.9.1.5 Overridden virtual functions:
virtual int_type underflow();
virtual int_type pbackfail(int_type __c = traits_type::eof());
virtual int_type overflow (int_type __c = traits_type::eof());
virtual basic_streambuf<char_type, traits_type>* setbuf(char_type* __s, streamsize __n);
virtual pos_type seekoff(off_type __off, ios_base::seekdir __way,
ios_base::openmode __wch = ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type __sp,
ios_base::openmode __wch = ios_base::in | ios_base::out);
virtual int sync();
virtual void imbue(const locale& __loc);
private:
char* __extbuf_;
const char* __extbufnext_;
const char* __extbufend_;
char __extbuf_min_[8];
size_t __ebs_;
char_type* __intbuf_;
size_t __ibs_;
FILE* __file_;
const codecvt<char_type, char, state_type>* __cv_;
state_type __st_;
state_type __st_last_;
ios_base::openmode __om_;
ios_base::openmode __cm_;
bool __owns_eb_;
bool __owns_ib_;
bool __always_noconv_;
bool __read_mode();
void __write_mode();
};
template <class _CharT, class _Traits>
basic_filebuf<_CharT, _Traits>::basic_filebuf()
: __extbuf_(0),
__extbufnext_(0),
__extbufend_(0),
__ebs_(0),
__intbuf_(0),
__ibs_(0),
__file_(0),
__cv_(nullptr),
__st_(),
__st_last_(),
__om_(0),
__cm_(0),
__owns_eb_(false),
__owns_ib_(false),
__always_noconv_(false)
{
if (has_facet<codecvt<char_type, char, state_type> >(this->getloc()))
{
__cv_ = &use_facet<codecvt<char_type, char, state_type> >(this->getloc());
__always_noconv_ = __cv_->always_noconv();
}
setbuf(0, 4096);
}
#ifndef _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
basic_filebuf<_CharT, _Traits>::basic_filebuf(basic_filebuf&& __rhs)
: basic_streambuf<_CharT, _Traits>(__rhs)
{
if (__rhs.__extbuf_ == __rhs.__extbuf_min_)
{
__extbuf_ = __extbuf_min_;
__extbufnext_ = __extbuf_ + (__rhs.__extbufnext_ - __rhs.__extbuf_);
__extbufend_ = __extbuf_ + (__rhs.__extbufend_ - __rhs.__extbuf_);
}
else
{
__extbuf_ = __rhs.__extbuf_;
__extbufnext_ = __rhs.__extbufnext_;
__extbufend_ = __rhs.__extbufend_;
}
__ebs_ = __rhs.__ebs_;
__intbuf_ = __rhs.__intbuf_;
__ibs_ = __rhs.__ibs_;
__file_ = __rhs.__file_;
__cv_ = __rhs.__cv_;
__st_ = __rhs.__st_;
__st_last_ = __rhs.__st_last_;
__om_ = __rhs.__om_;
__cm_ = __rhs.__cm_;
__owns_eb_ = __rhs.__owns_eb_;
__owns_ib_ = __rhs.__owns_ib_;
__always_noconv_ = __rhs.__always_noconv_;
if (__rhs.pbase())
{
if (__rhs.pbase() == __rhs.__intbuf_)
this->setp(__intbuf_, __intbuf_ + (__rhs. epptr() - __rhs.pbase()));
else
this->setp((char_type*)__extbuf_,
(char_type*)__extbuf_ + (__rhs. epptr() - __rhs.pbase()));
this->__pbump(__rhs. pptr() - __rhs.pbase());
}
else if (__rhs.eback())
{
if (__rhs.eback() == __rhs.__intbuf_)
this->setg(__intbuf_, __intbuf_ + (__rhs.gptr() - __rhs.eback()),
__intbuf_ + (__rhs.egptr() - __rhs.eback()));
else
this->setg((char_type*)__extbuf_,
(char_type*)__extbuf_ + (__rhs.gptr() - __rhs.eback()),
(char_type*)__extbuf_ + (__rhs.egptr() - __rhs.eback()));
}
__rhs.__extbuf_ = 0;
__rhs.__extbufnext_ = 0;
__rhs.__extbufend_ = 0;
__rhs.__ebs_ = 0;
__rhs.__intbuf_ = 0;
__rhs.__ibs_ = 0;
__rhs.__file_ = 0;
__rhs.__st_ = state_type();
__rhs.__st_last_ = state_type();
__rhs.__om_ = 0;
__rhs.__cm_ = 0;
__rhs.__owns_eb_ = false;
__rhs.__owns_ib_ = false;
__rhs.setg(0, 0, 0);
__rhs.setp(0, 0);
}
template <class _CharT, class _Traits>
inline
basic_filebuf<_CharT, _Traits>&
basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs)
{
close();
swap(__rhs);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
basic_filebuf<_CharT, _Traits>::~basic_filebuf()
{
#ifndef _LIBCPP_NO_EXCEPTIONS
try
{
#endif // _LIBCPP_NO_EXCEPTIONS
close();
#ifndef _LIBCPP_NO_EXCEPTIONS
}
catch (...)
{
}
#endif // _LIBCPP_NO_EXCEPTIONS
if (__owns_eb_)
delete [] __extbuf_;
if (__owns_ib_)
delete [] __intbuf_;
}
template <class _CharT, class _Traits>
void
basic_filebuf<_CharT, _Traits>::swap(basic_filebuf& __rhs)
{
basic_streambuf<char_type, traits_type>::swap(__rhs);
if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_)
{
_VSTD::swap(__extbuf_, __rhs.__extbuf_);
_VSTD::swap(__extbufnext_, __rhs.__extbufnext_);
_VSTD::swap(__extbufend_, __rhs.__extbufend_);
}
else
{
ptrdiff_t __ln = __extbufnext_ - __extbuf_;
ptrdiff_t __le = __extbufend_ - __extbuf_;
ptrdiff_t __rn = __rhs.__extbufnext_ - __rhs.__extbuf_;
ptrdiff_t __re = __rhs.__extbufend_ - __rhs.__extbuf_;
if (__extbuf_ == __extbuf_min_ && __rhs.__extbuf_ != __rhs.__extbuf_min_)
{
__extbuf_ = __rhs.__extbuf_;
__rhs.__extbuf_ = __rhs.__extbuf_min_;
}
else if (__extbuf_ != __extbuf_min_ && __rhs.__extbuf_ == __rhs.__extbuf_min_)
{
__rhs.__extbuf_ = __extbuf_;
__extbuf_ = __extbuf_min_;
}
__extbufnext_ = __extbuf_ + __rn;
__extbufend_ = __extbuf_ + __re;
__rhs.__extbufnext_ = __rhs.__extbuf_ + __ln;
__rhs.__extbufend_ = __rhs.__extbuf_ + __le;
}
_VSTD::swap(__ebs_, __rhs.__ebs_);
_VSTD::swap(__intbuf_, __rhs.__intbuf_);
_VSTD::swap(__ibs_, __rhs.__ibs_);
_VSTD::swap(__file_, __rhs.__file_);
_VSTD::swap(__cv_, __rhs.__cv_);
_VSTD::swap(__st_, __rhs.__st_);
_VSTD::swap(__st_last_, __rhs.__st_last_);
_VSTD::swap(__om_, __rhs.__om_);
_VSTD::swap(__cm_, __rhs.__cm_);
_VSTD::swap(__owns_eb_, __rhs.__owns_eb_);
_VSTD::swap(__owns_ib_, __rhs.__owns_ib_);
_VSTD::swap(__always_noconv_, __rhs.__always_noconv_);
if (this->eback() == (char_type*)__rhs.__extbuf_min_)
{
ptrdiff_t __n = this->gptr() - this->eback();
ptrdiff_t __e = this->egptr() - this->eback();
this->setg((char_type*)__extbuf_min_,
(char_type*)__extbuf_min_ + __n,
(char_type*)__extbuf_min_ + __e);
}
else if (this->pbase() == (char_type*)__rhs.__extbuf_min_)
{
ptrdiff_t __n = this->pptr() - this->pbase();
ptrdiff_t __e = this->epptr() - this->pbase();
this->setp((char_type*)__extbuf_min_,
(char_type*)__extbuf_min_ + __e);
this->__pbump(__n);
}
if (__rhs.eback() == (char_type*)__extbuf_min_)
{
ptrdiff_t __n = __rhs.gptr() - __rhs.eback();
ptrdiff_t __e = __rhs.egptr() - __rhs.eback();
__rhs.setg((char_type*)__rhs.__extbuf_min_,
(char_type*)__rhs.__extbuf_min_ + __n,
(char_type*)__rhs.__extbuf_min_ + __e);
}
else if (__rhs.pbase() == (char_type*)__extbuf_min_)
{
ptrdiff_t __n = __rhs.pptr() - __rhs.pbase();
ptrdiff_t __e = __rhs.epptr() - __rhs.pbase();
__rhs.setp((char_type*)__rhs.__extbuf_min_,
(char_type*)__rhs.__extbuf_min_ + __e);
__rhs.__pbump(__n);
}
}
template <class _CharT, class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(basic_filebuf<_CharT, _Traits>& __x, basic_filebuf<_CharT, _Traits>& __y)
{
__x.swap(__y);
}
template <class _CharT, class _Traits>
inline
bool
basic_filebuf<_CharT, _Traits>::is_open() const
{
return __file_ != 0;
}
template <class _CharT, class _Traits>
const char* basic_filebuf<_CharT, _Traits>::__make_mdstring(
ios_base::openmode __mode) _NOEXCEPT {
switch (__mode & ~ios_base::ate) {
case ios_base::out:
case ios_base::out | ios_base::trunc:
return "w";
case ios_base::out | ios_base::app:
case ios_base::app:
return "a";
case ios_base::in:
return "r";
case ios_base::in | ios_base::out:
return "r+";
case ios_base::in | ios_base::out | ios_base::trunc:
return "w+";
case ios_base::in | ios_base::out | ios_base::app:
case ios_base::in | ios_base::app:
return "a+";
case ios_base::out | ios_base::binary:
case ios_base::out | ios_base::trunc | ios_base::binary:
return "wb";
case ios_base::out | ios_base::app | ios_base::binary:
case ios_base::app | ios_base::binary:
return "ab";
case ios_base::in | ios_base::binary:
return "rb";
case ios_base::in | ios_base::out | ios_base::binary:
return "r+b";
case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
return "w+b";
case ios_base::in | ios_base::out | ios_base::app | ios_base::binary:
case ios_base::in | ios_base::app | ios_base::binary:
return "a+b";
default:
return nullptr;
}
_LIBCPP_UNREACHABLE();
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
basic_filebuf<_CharT, _Traits>*
basic_filebuf<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
{
basic_filebuf<_CharT, _Traits>* __rt = 0;
if (__file_ == 0)
{
if (const char* __mdstr = __make_mdstring(__mode)) {
__rt = this;
__file_ = fopen(__s, __mdstr);
if (__file_) {
__om_ = __mode;
if (__mode & ios_base::ate) {
if (fseek(__file_, 0, SEEK_END)) {
fclose(__file_);
__file_ = 0;
__rt = 0;
}
}
} else
__rt = 0;
}
}
return __rt;
}
template <class _CharT, class _Traits>
_LIBCPP_INLINE_VISIBILITY basic_filebuf<_CharT, _Traits>*
basic_filebuf<_CharT, _Traits>::__open(int __fd, ios_base::openmode __mode) {
basic_filebuf<_CharT, _Traits>* __rt = 0;
if (__file_ == 0) {
if (const char* __mdstr = __make_mdstring(__mode)) {
__rt = this;
__file_ = fdopen(__fd, __mdstr);
if (__file_) {
__om_ = __mode;
if (__mode & ios_base::ate) {
if (fseek(__file_, 0, SEEK_END)) {
fclose(__file_);
__file_ = 0;
__rt = 0;
}
}
} else
__rt = 0;
}
}
return __rt;
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
// This is basically the same as the char* overload except that it uses _wfopen
// and long mode strings.
template <class _CharT, class _Traits>
basic_filebuf<_CharT, _Traits>*
basic_filebuf<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
{
basic_filebuf<_CharT, _Traits>* __rt = 0;
if (__file_ == 0)
{
__rt = this;
const wchar_t* __mdstr;
switch (__mode & ~ios_base::ate)
{
case ios_base::out:
case ios_base::out | ios_base::trunc:
__mdstr = L"w";
break;
case ios_base::out | ios_base::app:
case ios_base::app:
__mdstr = L"a";
break;
case ios_base::in:
__mdstr = L"r";
break;
case ios_base::in | ios_base::out:
__mdstr = L"r+";
break;
case ios_base::in | ios_base::out | ios_base::trunc:
__mdstr = L"w+";
break;
case ios_base::in | ios_base::out | ios_base::app:
case ios_base::in | ios_base::app:
__mdstr = L"a+";
break;
case ios_base::out | ios_base::binary:
case ios_base::out | ios_base::trunc | ios_base::binary:
__mdstr = L"wb";
break;
case ios_base::out | ios_base::app | ios_base::binary:
case ios_base::app | ios_base::binary:
__mdstr = L"ab";
break;
case ios_base::in | ios_base::binary:
__mdstr = L"rb";
break;
case ios_base::in | ios_base::out | ios_base::binary:
__mdstr = L"r+b";
break;
case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
__mdstr = L"w+b";
break;
case ios_base::in | ios_base::out | ios_base::app | ios_base::binary:
case ios_base::in | ios_base::app | ios_base::binary:
__mdstr = L"a+b";
break;
default:
__rt = 0;
break;
}
if (__rt)
{
__file_ = _wfopen(__s, __mdstr);
if (__file_)
{
__om_ = __mode;
if (__mode & ios_base::ate)
{
if (fseek(__file_, 0, SEEK_END))
{
fclose(__file_);
__file_ = 0;
__rt = 0;
}
}
}
else
__rt = 0;
}
}
return __rt;
}
#endif
template <class _CharT, class _Traits>
inline
basic_filebuf<_CharT, _Traits>*
basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
{
return open(__s.c_str(), __mode);
}
#endif
template <class _CharT, class _Traits>
basic_filebuf<_CharT, _Traits>*
basic_filebuf<_CharT, _Traits>::close()
{
basic_filebuf<_CharT, _Traits>* __rt = 0;
if (__file_)
{
__rt = this;
unique_ptr<FILE, int(*)(FILE*)> __h(__file_, fclose);
if (sync())
__rt = 0;
if (fclose(__h.release()))
__rt = 0;
__file_ = 0;
setbuf(0, 0);
}
return __rt;
}
template <class _CharT, class _Traits>
typename basic_filebuf<_CharT, _Traits>::int_type
basic_filebuf<_CharT, _Traits>::underflow()
{
if (__file_ == 0)
return traits_type::eof();
bool __initial = __read_mode();
char_type __1buf;
if (this->gptr() == 0)
this->setg(&__1buf, &__1buf+1, &__1buf+1);
const size_t __unget_sz = __initial ? 0 : min<size_t>((this->egptr() - this->eback()) / 2, 4);
int_type __c = traits_type::eof();
if (this->gptr() == this->egptr())
{
memmove(this->eback(), this->egptr() - __unget_sz, __unget_sz * sizeof(char_type));
if (__always_noconv_)
{
size_t __nmemb = static_cast<size_t>(this->egptr() - this->eback() - __unget_sz);
__nmemb = fread(this->eback() + __unget_sz, 1, __nmemb, __file_);
if (__nmemb != 0)
{
this->setg(this->eback(),
this->eback() + __unget_sz,
this->eback() + __unget_sz + __nmemb);
__c = traits_type::to_int_type(*this->gptr());
}
}
else
{
_LIBCPP_ASSERT ( !(__extbufnext_ == NULL && (__extbufend_ != __extbufnext_)), "underflow moving from NULL" );
if (__extbufend_ != __extbufnext_)
memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
__extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_);
__extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
size_t __nmemb = _VSTD::min(static_cast<size_t>(__ibs_ - __unget_sz),
static_cast<size_t>(__extbufend_ - __extbufnext_));
codecvt_base::result __r;
__st_last_ = __st_;
size_t __nr = fread((void*) const_cast<char *>(__extbufnext_), 1, __nmemb, __file_);
if (__nr != 0)
{
if (!__cv_)
__throw_bad_cast();
__extbufend_ = __extbufnext_ + __nr;
char_type* __inext;
__r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_,
this->eback() + __unget_sz,
this->eback() + __ibs_, __inext);
if (__r == codecvt_base::noconv)
{
this->setg((char_type*)__extbuf_, (char_type*)__extbuf_,
(char_type*)const_cast<char *>(__extbufend_));
__c = traits_type::to_int_type(*this->gptr());
}
else if (__inext != this->eback() + __unget_sz)
{
this->setg(this->eback(), this->eback() + __unget_sz, __inext);
__c = traits_type::to_int_type(*this->gptr());
}
}
}
}
else
__c = traits_type::to_int_type(*this->gptr());
if (this->eback() == &__1buf)
this->setg(0, 0, 0);
return __c;
}
template <class _CharT, class _Traits>
typename basic_filebuf<_CharT, _Traits>::int_type
basic_filebuf<_CharT, _Traits>::pbackfail(int_type __c)
{
if (__file_ && this->eback() < this->gptr())
{
if (traits_type::eq_int_type(__c, traits_type::eof()))
{
this->gbump(-1);
return traits_type::not_eof(__c);
}
if ((__om_ & ios_base::out) ||
traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1]))
{
this->gbump(-1);
*this->gptr() = traits_type::to_char_type(__c);
return __c;
}
}
return traits_type::eof();
}
template <class _CharT, class _Traits>
typename basic_filebuf<_CharT, _Traits>::int_type
basic_filebuf<_CharT, _Traits>::overflow(int_type __c)
{
if (__file_ == 0)
return traits_type::eof();
__write_mode();
char_type __1buf;
char_type* __pb_save = this->pbase();
char_type* __epb_save = this->epptr();
if (!traits_type::eq_int_type(__c, traits_type::eof()))
{
if (this->pptr() == 0)
this->setp(&__1buf, &__1buf+1);
*this->pptr() = traits_type::to_char_type(__c);
this->pbump(1);
}
if (this->pptr() != this->pbase())
{
if (__always_noconv_)
{
size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase());
if (fwrite(this->pbase(), sizeof(char_type), __nmemb, __file_) != __nmemb)
return traits_type::eof();
}
else
{
char* __extbe = __extbuf_;
codecvt_base::result __r;
do
{
if (!__cv_)
__throw_bad_cast();
const char_type* __e;
__r = __cv_->out(__st_, this->pbase(), this->pptr(), __e,
__extbuf_, __extbuf_ + __ebs_, __extbe);
if (__e == this->pbase())
return traits_type::eof();
if (__r == codecvt_base::noconv)
{
size_t __nmemb = static_cast<size_t>(this->pptr() - this->pbase());
if (fwrite(this->pbase(), 1, __nmemb, __file_) != __nmemb)
return traits_type::eof();
}
else if (__r == codecvt_base::ok || __r == codecvt_base::partial)
{
size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_);
if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb)
return traits_type::eof();
if (__r == codecvt_base::partial)
{
this->setp(const_cast<char_type*>(__e), this->pptr());
this->__pbump(this->epptr() - this->pbase());
}
}
else
return traits_type::eof();
} while (__r == codecvt_base::partial);
}
this->setp(__pb_save, __epb_save);
}
return traits_type::not_eof(__c);
}
template <class _CharT, class _Traits>
basic_streambuf<_CharT, _Traits>*
basic_filebuf<_CharT, _Traits>::setbuf(char_type* __s, streamsize __n)
{
this->setg(0, 0, 0);
this->setp(0, 0);
if (__owns_eb_)
delete [] __extbuf_;
if (__owns_ib_)
delete [] __intbuf_;
__ebs_ = __n;
if (__ebs_ > sizeof(__extbuf_min_))
{
if (__always_noconv_ && __s)
{
__extbuf_ = (char*)__s;
__owns_eb_ = false;
}
else
{
__extbuf_ = new char[__ebs_];
__owns_eb_ = true;
}
}
else
{
__extbuf_ = __extbuf_min_;
__ebs_ = sizeof(__extbuf_min_);
__owns_eb_ = false;
}
if (!__always_noconv_)
{
__ibs_ = max<streamsize>(__n, sizeof(__extbuf_min_));
if (__s && __ibs_ >= sizeof(__extbuf_min_))
{
__intbuf_ = __s;
__owns_ib_ = false;
}
else
{
__intbuf_ = new char_type[__ibs_];
__owns_ib_ = true;
}
}
else
{
__ibs_ = 0;
__intbuf_ = 0;
__owns_ib_ = false;
}
return this;
}
template <class _CharT, class _Traits>
typename basic_filebuf<_CharT, _Traits>::pos_type
basic_filebuf<_CharT, _Traits>::seekoff(off_type __off, ios_base::seekdir __way,
ios_base::openmode)
{
if (!__cv_)
__throw_bad_cast();
int __width = __cv_->encoding();
if (__file_ == 0 || (__width <= 0 && __off != 0) || sync())
return pos_type(off_type(-1));
// __width > 0 || __off == 0
int __whence;
switch (__way)
{
case ios_base::beg:
__whence = SEEK_SET;
break;
case ios_base::cur:
__whence = SEEK_CUR;
break;
case ios_base::end:
__whence = SEEK_END;
break;
default:
return pos_type(off_type(-1));
}
#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
if (fseek(__file_, __width > 0 ? __width * __off : 0, __whence))
return pos_type(off_type(-1));
pos_type __r = ftell(__file_);
#else
if (fseeko(__file_, __width > 0 ? __width * __off : 0, __whence))
return pos_type(off_type(-1));
pos_type __r = ftello(__file_);
#endif
__r.state(__st_);
return __r;
}
template <class _CharT, class _Traits>
typename basic_filebuf<_CharT, _Traits>::pos_type
basic_filebuf<_CharT, _Traits>::seekpos(pos_type __sp, ios_base::openmode)
{
if (__file_ == 0 || sync())
return pos_type(off_type(-1));
#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
if (fseek(__file_, __sp, SEEK_SET))
return pos_type(off_type(-1));
#else
if (fseeko(__file_, __sp, SEEK_SET))
return pos_type(off_type(-1));
#endif
__st_ = __sp.state();
return __sp;
}
template <class _CharT, class _Traits>
int
basic_filebuf<_CharT, _Traits>::sync()
{
if (__file_ == 0)
return 0;
if (!__cv_)
__throw_bad_cast();
if (__cm_ & ios_base::out)
{
if (this->pptr() != this->pbase())
if (overflow() == traits_type::eof())
return -1;
codecvt_base::result __r;
do
{
char* __extbe;
__r = __cv_->unshift(__st_, __extbuf_, __extbuf_ + __ebs_, __extbe);
size_t __nmemb = static_cast<size_t>(__extbe - __extbuf_);
if (fwrite(__extbuf_, 1, __nmemb, __file_) != __nmemb)
return -1;
} while (__r == codecvt_base::partial);
if (__r == codecvt_base::error)
return -1;
if (fflush(__file_))
return -1;
}
else if (__cm_ & ios_base::in)
{
off_type __c;
state_type __state = __st_last_;
bool __update_st = false;
if (__always_noconv_)
__c = this->egptr() - this->gptr();
else
{
int __width = __cv_->encoding();
__c = __extbufend_ - __extbufnext_;
if (__width > 0)
__c += __width * (this->egptr() - this->gptr());
else
{
if (this->gptr() != this->egptr())
{
const int __off = __cv_->length(__state, __extbuf_,
__extbufnext_,
this->gptr() - this->eback());
__c += __extbufnext_ - __extbuf_ - __off;
__update_st = true;
}
}
}
#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
if (fseek(__file_, -__c, SEEK_CUR))
return -1;
#else
if (fseeko(__file_, -__c, SEEK_CUR))
return -1;
#endif
if (__update_st)
__st_ = __state;
__extbufnext_ = __extbufend_ = __extbuf_;
this->setg(0, 0, 0);
__cm_ = 0;
}
return 0;
}
template <class _CharT, class _Traits>
void
basic_filebuf<_CharT, _Traits>::imbue(const locale& __loc)
{
sync();
__cv_ = &use_facet<codecvt<char_type, char, state_type> >(__loc);
bool __old_anc = __always_noconv_;
__always_noconv_ = __cv_->always_noconv();
if (__old_anc != __always_noconv_)
{
this->setg(0, 0, 0);
this->setp(0, 0);
// invariant, char_type is char, else we couldn't get here
if (__always_noconv_) // need to dump __intbuf_
{
if (__owns_eb_)
delete [] __extbuf_;
__owns_eb_ = __owns_ib_;
__ebs_ = __ibs_;
__extbuf_ = (char*)__intbuf_;
__ibs_ = 0;
__intbuf_ = 0;
__owns_ib_ = false;
}
else // need to obtain an __intbuf_.
{ // If __extbuf_ is user-supplied, use it, else new __intbuf_
if (!__owns_eb_ && __extbuf_ != __extbuf_min_)
{
__ibs_ = __ebs_;
__intbuf_ = (char_type*)__extbuf_;
__owns_ib_ = false;
__extbuf_ = new char[__ebs_];
__owns_eb_ = true;
}
else
{
__ibs_ = __ebs_;
__intbuf_ = new char_type[__ibs_];
__owns_ib_ = true;
}
}
}
}
template <class _CharT, class _Traits>
bool
basic_filebuf<_CharT, _Traits>::__read_mode()
{
if (!(__cm_ & ios_base::in))
{
this->setp(0, 0);
if (__always_noconv_)
this->setg((char_type*)__extbuf_,
(char_type*)__extbuf_ + __ebs_,
(char_type*)__extbuf_ + __ebs_);
else
this->setg(__intbuf_, __intbuf_ + __ibs_, __intbuf_ + __ibs_);
__cm_ = ios_base::in;
return true;
}
return false;
}
template <class _CharT, class _Traits>
void
basic_filebuf<_CharT, _Traits>::__write_mode()
{
if (!(__cm_ & ios_base::out))
{
this->setg(0, 0, 0);
if (__ebs_ > sizeof(__extbuf_min_))
{
if (__always_noconv_)
this->setp((char_type*)__extbuf_,
(char_type*)__extbuf_ + (__ebs_ - 1));
else
this->setp(__intbuf_, __intbuf_ + (__ibs_ - 1));
}
else
this->setp(0, 0);
__cm_ = ios_base::out;
}
}
// basic_ifstream
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_ifstream
: public basic_istream<_CharT, _Traits>
{
public:
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;
_LIBCPP_INLINE_VISIBILITY
basic_ifstream();
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
_LIBCPP_INLINE_VISIBILITY
explicit basic_ifstream(const char* __s, ios_base::openmode __mode = ios_base::in);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
_LIBCPP_INLINE_VISIBILITY
explicit basic_ifstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
#endif
_LIBCPP_INLINE_VISIBILITY
explicit basic_ifstream(const string& __s, ios_base::openmode __mode = ios_base::in);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
explicit basic_ifstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in)
: basic_ifstream(__p.c_str(), __mode) {}
#endif // _LIBCPP_STD_VER >= 17
#endif
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
basic_ifstream(basic_ifstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
basic_ifstream& operator=(basic_ifstream&& __rhs);
#endif
_LIBCPP_INLINE_VISIBILITY
void swap(basic_ifstream& __rhs);
_LIBCPP_INLINE_VISIBILITY
basic_filebuf<char_type, traits_type>* rdbuf() const;
_LIBCPP_INLINE_VISIBILITY
bool is_open() const;
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
void open(const char* __s, ios_base::openmode __mode = ios_base::in);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in);
#endif
void open(const string& __s, ios_base::openmode __mode = ios_base::in);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
void open(const filesystem::path& __p,
ios_base::openmode __mode = ios_base::in) {
return open(__p.c_str(), __mode);
}
#endif // _LIBCPP_STD_VER >= 17
_LIBCPP_INLINE_VISIBILITY
void __open(int __fd, ios_base::openmode __mode);
#endif
_LIBCPP_INLINE_VISIBILITY
void close();
private:
basic_filebuf<char_type, traits_type> __sb_;
};
template <class _CharT, class _Traits>
inline
basic_ifstream<_CharT, _Traits>::basic_ifstream()
: basic_istream<char_type, traits_type>(&__sb_)
{
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
inline
basic_ifstream<_CharT, _Traits>::basic_ifstream(const char* __s, ios_base::openmode __mode)
: basic_istream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode | ios_base::in) == 0)
this->setstate(ios_base::failbit);
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
template <class _CharT, class _Traits>
inline
basic_ifstream<_CharT, _Traits>::basic_ifstream(const wchar_t* __s, ios_base::openmode __mode)
: basic_istream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode | ios_base::in) == 0)
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
inline
basic_ifstream<_CharT, _Traits>::basic_ifstream(const string& __s, ios_base::openmode __mode)
: basic_istream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode | ios_base::in) == 0)
this->setstate(ios_base::failbit);
}
#endif
#ifndef _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
inline
basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs)
: basic_istream<char_type, traits_type>(_VSTD::move(__rhs)),
__sb_(_VSTD::move(__rhs.__sb_))
{
this->set_rdbuf(&__sb_);
}
template <class _CharT, class _Traits>
inline
basic_ifstream<_CharT, _Traits>&
basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs)
{
basic_istream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
__sb_ = _VSTD::move(__rhs.__sb_);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
inline
void
basic_ifstream<_CharT, _Traits>::swap(basic_ifstream& __rhs)
{
basic_istream<char_type, traits_type>::swap(__rhs);
__sb_.swap(__rhs.__sb_);
}
template <class _CharT, class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(basic_ifstream<_CharT, _Traits>& __x, basic_ifstream<_CharT, _Traits>& __y)
{
__x.swap(__y);
}
template <class _CharT, class _Traits>
inline
basic_filebuf<_CharT, _Traits>*
basic_ifstream<_CharT, _Traits>::rdbuf() const
{
return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_);
}
template <class _CharT, class _Traits>
inline
bool
basic_ifstream<_CharT, _Traits>::is_open() const
{
return __sb_.is_open();
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
void
basic_ifstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode | ios_base::in))
this->clear();
else
this->setstate(ios_base::failbit);
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
template <class _CharT, class _Traits>
void
basic_ifstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode | ios_base::in))
this->clear();
else
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
void
basic_ifstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode | ios_base::in))
this->clear();
else
this->setstate(ios_base::failbit);
}
template <class _CharT, class _Traits>
void basic_ifstream<_CharT, _Traits>::__open(int __fd,
ios_base::openmode __mode) {
if (__sb_.__open(__fd, __mode | ios_base::in))
this->clear();
else
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
inline
void
basic_ifstream<_CharT, _Traits>::close()
{
if (__sb_.close() == 0)
this->setstate(ios_base::failbit);
}
// basic_ofstream
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_ofstream
: public basic_ostream<_CharT, _Traits>
{
public:
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;
_LIBCPP_INLINE_VISIBILITY
basic_ofstream();
_LIBCPP_INLINE_VISIBILITY
explicit basic_ofstream(const char* __s, ios_base::openmode __mode = ios_base::out);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
_LIBCPP_INLINE_VISIBILITY
explicit basic_ofstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::out);
#endif
_LIBCPP_INLINE_VISIBILITY
explicit basic_ofstream(const string& __s, ios_base::openmode __mode = ios_base::out);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
explicit basic_ofstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
: basic_ofstream(__p.c_str(), __mode) {}
#endif // _LIBCPP_STD_VER >= 17
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
basic_ofstream(basic_ofstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
basic_ofstream& operator=(basic_ofstream&& __rhs);
#endif
_LIBCPP_INLINE_VISIBILITY
void swap(basic_ofstream& __rhs);
_LIBCPP_INLINE_VISIBILITY
basic_filebuf<char_type, traits_type>* rdbuf() const;
_LIBCPP_INLINE_VISIBILITY
bool is_open() const;
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
void open(const char* __s, ios_base::openmode __mode = ios_base::out);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::out);
#endif
void open(const string& __s, ios_base::openmode __mode = ios_base::out);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::out)
{ return open(__p.c_str(), __mode); }
#endif // _LIBCPP_STD_VER >= 17
_LIBCPP_INLINE_VISIBILITY
void __open(int __fd, ios_base::openmode __mode);
#endif
_LIBCPP_INLINE_VISIBILITY
void close();
private:
basic_filebuf<char_type, traits_type> __sb_;
};
template <class _CharT, class _Traits>
inline
basic_ofstream<_CharT, _Traits>::basic_ofstream()
: basic_ostream<char_type, traits_type>(&__sb_)
{
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
inline
basic_ofstream<_CharT, _Traits>::basic_ofstream(const char* __s, ios_base::openmode __mode)
: basic_ostream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode | ios_base::out) == 0)
this->setstate(ios_base::failbit);
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
template <class _CharT, class _Traits>
inline
basic_ofstream<_CharT, _Traits>::basic_ofstream(const wchar_t* __s, ios_base::openmode __mode)
: basic_ostream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode | ios_base::out) == 0)
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
inline
basic_ofstream<_CharT, _Traits>::basic_ofstream(const string& __s, ios_base::openmode __mode)
: basic_ostream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode | ios_base::out) == 0)
this->setstate(ios_base::failbit);
}
#endif
#ifndef _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
inline
basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs)
: basic_ostream<char_type, traits_type>(_VSTD::move(__rhs)),
__sb_(_VSTD::move(__rhs.__sb_))
{
this->set_rdbuf(&__sb_);
}
template <class _CharT, class _Traits>
inline
basic_ofstream<_CharT, _Traits>&
basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs)
{
basic_ostream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
__sb_ = _VSTD::move(__rhs.__sb_);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
inline
void
basic_ofstream<_CharT, _Traits>::swap(basic_ofstream& __rhs)
{
basic_ostream<char_type, traits_type>::swap(__rhs);
__sb_.swap(__rhs.__sb_);
}
template <class _CharT, class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(basic_ofstream<_CharT, _Traits>& __x, basic_ofstream<_CharT, _Traits>& __y)
{
__x.swap(__y);
}
template <class _CharT, class _Traits>
inline
basic_filebuf<_CharT, _Traits>*
basic_ofstream<_CharT, _Traits>::rdbuf() const
{
return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_);
}
template <class _CharT, class _Traits>
inline
bool
basic_ofstream<_CharT, _Traits>::is_open() const
{
return __sb_.is_open();
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
void
basic_ofstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode | ios_base::out))
this->clear();
else
this->setstate(ios_base::failbit);
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
template <class _CharT, class _Traits>
void
basic_ofstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode | ios_base::out))
this->clear();
else
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
void
basic_ofstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode | ios_base::out))
this->clear();
else
this->setstate(ios_base::failbit);
}
template <class _CharT, class _Traits>
void basic_ofstream<_CharT, _Traits>::__open(int __fd,
ios_base::openmode __mode) {
if (__sb_.__open(__fd, __mode | ios_base::out))
this->clear();
else
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
inline
void
basic_ofstream<_CharT, _Traits>::close()
{
if (__sb_.close() == 0)
this->setstate(ios_base::failbit);
}
// basic_fstream
template <class _CharT, class _Traits>
class _LIBCPP_TEMPLATE_VIS basic_fstream
: public basic_iostream<_CharT, _Traits>
{
public:
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;
_LIBCPP_INLINE_VISIBILITY
basic_fstream();
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
_LIBCPP_INLINE_VISIBILITY
explicit basic_fstream(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
_LIBCPP_INLINE_VISIBILITY
explicit basic_fstream(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
#endif
_LIBCPP_INLINE_VISIBILITY
explicit basic_fstream(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
explicit basic_fstream(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in | ios_base::out)
: basic_fstream(__p.c_str(), __mode) {}
#endif // _LIBCPP_STD_VER >= 17
#endif
#ifndef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
basic_fstream(basic_fstream&& __rhs);
_LIBCPP_INLINE_VISIBILITY
basic_fstream& operator=(basic_fstream&& __rhs);
#endif
_LIBCPP_INLINE_VISIBILITY
void swap(basic_fstream& __rhs);
_LIBCPP_INLINE_VISIBILITY
basic_filebuf<char_type, traits_type>* rdbuf() const;
_LIBCPP_INLINE_VISIBILITY
bool is_open() const;
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
void open(const char* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
void open(const wchar_t* __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
#endif
void open(const string& __s, ios_base::openmode __mode = ios_base::in | ios_base::out);
#if _LIBCPP_STD_VER >= 17
_LIBCPP_AVAILABILITY_FILESYSTEM _LIBCPP_INLINE_VISIBILITY
void open(const filesystem::path& __p, ios_base::openmode __mode = ios_base::in|ios_base::out)
{ return open(__p.c_str(), __mode); }
#endif // _LIBCPP_STD_VER >= 17
#endif
_LIBCPP_INLINE_VISIBILITY
void close();
private:
basic_filebuf<char_type, traits_type> __sb_;
};
template <class _CharT, class _Traits>
inline
basic_fstream<_CharT, _Traits>::basic_fstream()
: basic_iostream<char_type, traits_type>(&__sb_)
{
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
inline
basic_fstream<_CharT, _Traits>::basic_fstream(const char* __s, ios_base::openmode __mode)
: basic_iostream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode) == 0)
this->setstate(ios_base::failbit);
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
template <class _CharT, class _Traits>
inline
basic_fstream<_CharT, _Traits>::basic_fstream(const wchar_t* __s, ios_base::openmode __mode)
: basic_iostream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode) == 0)
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
inline
basic_fstream<_CharT, _Traits>::basic_fstream(const string& __s, ios_base::openmode __mode)
: basic_iostream<char_type, traits_type>(&__sb_)
{
if (__sb_.open(__s, __mode) == 0)
this->setstate(ios_base::failbit);
}
#endif
#ifndef _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
inline
basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs)
: basic_iostream<char_type, traits_type>(_VSTD::move(__rhs)),
__sb_(_VSTD::move(__rhs.__sb_))
{
this->set_rdbuf(&__sb_);
}
template <class _CharT, class _Traits>
inline
basic_fstream<_CharT, _Traits>&
basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs)
{
basic_iostream<char_type, traits_type>::operator=(_VSTD::move(__rhs));
__sb_ = _VSTD::move(__rhs.__sb_);
return *this;
}
#endif // _LIBCPP_CXX03_LANG
template <class _CharT, class _Traits>
inline
void
basic_fstream<_CharT, _Traits>::swap(basic_fstream& __rhs)
{
basic_iostream<char_type, traits_type>::swap(__rhs);
__sb_.swap(__rhs.__sb_);
}
template <class _CharT, class _Traits>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(basic_fstream<_CharT, _Traits>& __x, basic_fstream<_CharT, _Traits>& __y)
{
__x.swap(__y);
}
template <class _CharT, class _Traits>
inline
basic_filebuf<_CharT, _Traits>*
basic_fstream<_CharT, _Traits>::rdbuf() const
{
return const_cast<basic_filebuf<char_type, traits_type>*>(&__sb_);
}
template <class _CharT, class _Traits>
inline
bool
basic_fstream<_CharT, _Traits>::is_open() const
{
return __sb_.is_open();
}
#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
template <class _CharT, class _Traits>
void
basic_fstream<_CharT, _Traits>::open(const char* __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode))
this->clear();
else
this->setstate(ios_base::failbit);
}
#ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
template <class _CharT, class _Traits>
void
basic_fstream<_CharT, _Traits>::open(const wchar_t* __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode))
this->clear();
else
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
void
basic_fstream<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
{
if (__sb_.open(__s, __mode))
this->clear();
else
this->setstate(ios_base::failbit);
}
#endif
template <class _CharT, class _Traits>
inline
void
basic_fstream<_CharT, _Traits>::close()
{
if (__sb_.close() == 0)
this->setstate(ios_base::failbit);
}
_LIBCPP_END_NAMESPACE_STD
_LIBCPP_POP_MACROS
#endif // _LIBCPP_FSTREAM
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