libcxx initial import
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/fstream b/include/fstream
new file mode 100644
index 0000000..88e7dc5
--- /dev/null
+++ b/include/fstream
@@ -0,0 +1,1394 @@
+// -*- C++ -*-
+//===------------------------- fstream ------------------------------------===//
+//
+// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#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* 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);
+ 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 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);
+ 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 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);
+ 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 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>
+
+#pragma GCC system_header
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _CharT, class _Traits>
+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;
+ typedef typename traits_type::state_type state_type;
+
+ // 27.9.1.2 Constructors/destructor:
+ basic_filebuf();
+#ifdef _LIBCPP_MOVE
+ basic_filebuf(basic_filebuf&& __rhs);
+#endif
+ virtual ~basic_filebuf();
+
+ // 27.9.1.3 Assign/swap:
+#ifdef _LIBCPP_MOVE
+ basic_filebuf& operator=(basic_filebuf&& __rhs);
+#endif
+ 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* close();
+
+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_;
+ 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_(&use_facet<codecvt<char_type, char, state_type> >(this->getloc())),
+ __st_(),
+ __om_(0),
+ __cm_(0),
+ __owns_eb_(false),
+ __owns_ib_(false),
+ __always_noconv_(__cv_->always_noconv())
+{
+ setbuf(0, 4096);
+}
+
+#ifdef _LIBCPP_MOVE
+
+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_;
+ __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.__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 _LIBCPP_INLINE_VISIBILITY
+basic_filebuf<_CharT, _Traits>&
+basic_filebuf<_CharT, _Traits>::operator=(basic_filebuf&& __rhs)
+{
+ close();
+ swap(__rhs);
+}
+
+#endif
+
+template <class _CharT, class _Traits>
+basic_filebuf<_CharT, _Traits>::~basic_filebuf()
+{
+#ifndef _LIBCPP_NO_EXCEPTIONS
+ try
+ {
+#endif
+ close();
+#ifndef _LIBCPP_NO_EXCEPTIONS
+ }
+ catch (...)
+ {
+ }
+#endif
+ 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_)
+ {
+ _STD::swap(__extbuf_, __rhs.__extbuf_);
+ _STD::swap(__extbufnext_, __rhs.__extbufnext_);
+ _STD::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;
+ }
+ _STD::swap(__ebs_, __rhs.__ebs_);
+ _STD::swap(__intbuf_, __rhs.__intbuf_);
+ _STD::swap(__ibs_, __rhs.__ibs_);
+ _STD::swap(__file_, __rhs.__file_);
+ _STD::swap(__cv_, __rhs.__cv_);
+ _STD::swap(__st_, __rhs.__st_);
+ _STD::swap(__om_, __rhs.__om_);
+ _STD::swap(__cm_, __rhs.__cm_);
+ _STD::swap(__owns_eb_, __rhs.__owns_eb_);
+ _STD::swap(__owns_ib_, __rhs.__owns_ib_);
+ _STD::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 _LIBCPP_INLINE_VISIBILITY
+bool
+basic_filebuf<_CharT, _Traits>::is_open() const
+{
+ return __file_ != 0;
+}
+
+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)
+ {
+ __rt = this;
+ const char* __mdstr;
+ switch (__mode & ~ios_base::ate)
+ {
+ case ios_base::out:
+ case ios_base::out | ios_base::trunc:
+ __mdstr = "w";
+ break;
+ case ios_base::out | ios_base::app:
+ case ios_base::app:
+ __mdstr = "a";
+ break;
+ case ios_base::in:
+ __mdstr = "r";
+ break;
+ case ios_base::in | ios_base::out:
+ __mdstr = "r+";
+ break;
+ case ios_base::in | ios_base::out | ios_base::trunc:
+ __mdstr = "w+";
+ break;
+ case ios_base::in | ios_base::out | ios_base::app:
+ case ios_base::in | ios_base::app:
+ __mdstr = "a+";
+ break;
+ case ios_base::out | ios_base::binary:
+ case ios_base::out | ios_base::trunc | ios_base::binary:
+ __mdstr = "wb";
+ break;
+ case ios_base::out | ios_base::app | ios_base::binary:
+ case ios_base::app | ios_base::binary:
+ __mdstr = "ab";
+ break;
+ case ios_base::in | ios_base::binary:
+ __mdstr = "rb";
+ break;
+ case ios_base::in | ios_base::out | ios_base::binary:
+ __mdstr = "r+b";
+ break;
+ case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
+ __mdstr = "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 = "a+b";
+ break;
+ default:
+ __rt = 0;
+ break;
+ }
+ if (__rt)
+ {
+ __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>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_filebuf<_CharT, _Traits>*
+basic_filebuf<_CharT, _Traits>::open(const string& __s, ios_base::openmode __mode)
+{
+ return open(__s.c_str(), __mode);
+}
+
+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 ((__cm_ & ios_base::out) && sync())
+ __rt = 0;
+ if (fclose(__h.release()) == 0)
+ __file_ = 0;
+ else
+ __rt = 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 = *this->gptr();
+ }
+ }
+ else
+ {
+ memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
+ __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_);
+ __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
+ size_t __nmemb = min(static_cast<size_t>(this->egptr() - this->eback() - __unget_sz),
+ static_cast<size_t>(__extbufend_ - __extbufnext_));
+ codecvt_base::result __r;
+ state_type __svs = __st_;
+ size_t __nr = fread((void*)__extbufnext_, 1, __nmemb, __file_);
+ if (__nr != 0)
+ {
+ __extbufend_ = __extbufnext_ + __nr;
+ char_type* __inext;
+ __r = __cv_->in(__st_, __extbuf_, __extbufend_, __extbufnext_,
+ this->eback() + __unget_sz,
+ this->egptr(), __inext);
+ if (__r == codecvt_base::noconv)
+ {
+ this->setg((char_type*)__extbuf_, (char_type*)__extbuf_, (char_type*)__extbufend_);
+ __c = *this->gptr();
+ }
+ else if (__inext != this->eback() + __unget_sz)
+ {
+ this->setg(this->eback(), this->eback() + __unget_sz, __inext);
+ __c = *this->gptr();
+ }
+ }
+ }
+ }
+ else
+ __c = *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
+ {
+ 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((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)
+{
+ 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 (fseeko(__file_, __width > 0 ? __width * __off : 0, __whence))
+ return pos_type(off_type(-1));
+ pos_type __r = ftello(__file_);
+ __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 __wch)
+{
+ if (__file_ == 0 || sync())
+ return pos_type(off_type(-1));
+ if (fseeko(__file_, __sp, SEEK_SET))
+ return pos_type(off_type(-1));
+ return __sp;
+}
+
+template <class _CharT, class _Traits>
+int
+basic_filebuf<_CharT, _Traits>::sync()
+{
+ if (__file_ == 0)
+ return 0;
+ 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;
+ 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())
+ {
+ reverse(this->gptr(), this->egptr());
+ codecvt_base::result __r;
+ const char_type* __e = this->gptr();
+ char* __extbe;
+ do
+ {
+ __r = __cv_->out(__st_, __e, this->egptr(), __e,
+ __extbuf_, __extbuf_ + __ebs_, __extbe);
+ switch (__r)
+ {
+ case codecvt_base::noconv:
+ __c += this->egptr() - this->gptr();
+ break;
+ case codecvt_base::ok:
+ case codecvt_base::partial:
+ __c += __extbe - __extbuf_;
+ break;
+ default:
+ return -1;
+ }
+ } while (__r == codecvt_base::partial);
+ }
+ }
+ }
+ if (fseeko(__file_, -__c, SEEK_CUR))
+ return -1;
+ 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 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);
+#ifdef _LIBCPP_MOVE
+ basic_ifstream(basic_ifstream&& __rhs);
+#endif
+
+#ifdef _LIBCPP_MOVE
+ basic_ifstream& operator=(basic_ifstream&& __rhs);
+#endif
+ 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 close();
+
+private:
+ basic_filebuf<char_type, traits_type> __sb_;
+};
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ifstream<_CharT, _Traits>::basic_ifstream()
+ : basic_istream<char_type, traits_type>(&__sb_)
+{
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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);
+}
+
+#ifdef _LIBCPP_MOVE
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ifstream<_CharT, _Traits>::basic_ifstream(basic_ifstream&& __rhs)
+ : basic_istream<char_type, traits_type>(_STD::move(__rhs)),
+ __sb_(_STD::move(__rhs.__sb_))
+{
+ this->set_rdbuf(&__sb_);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ifstream<_CharT, _Traits>&
+basic_ifstream<_CharT, _Traits>::operator=(basic_ifstream&& __rhs)
+{
+ basic_istream<char_type, traits_type>::operator=(_STD::move(__rhs));
+ __sb_ = _STD::move(__rhs.__sb_);
+ return *this;
+}
+
+#endif
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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 _LIBCPP_INLINE_VISIBILITY
+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 _LIBCPP_INLINE_VISIBILITY
+bool
+basic_ifstream<_CharT, _Traits>::is_open() const
+{
+ return __sb_.is_open();
+}
+
+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);
+}
+
+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>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+basic_ifstream<_CharT, _Traits>::close()
+{
+ if (__sb_.close() == 0)
+ this->setstate(ios_base::failbit);
+}
+
+// basic_ofstream
+
+template <class _CharT, class _Traits>
+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);
+#ifdef _LIBCPP_MOVE
+ basic_ofstream(basic_ofstream&& __rhs);
+#endif
+
+#ifdef _LIBCPP_MOVE
+ basic_ofstream& operator=(basic_ofstream&& __rhs);
+#endif
+ 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 close();
+
+private:
+ basic_filebuf<char_type, traits_type> __sb_;
+};
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ofstream<_CharT, _Traits>::basic_ofstream()
+ : basic_ostream<char_type, traits_type>(&__sb_)
+{
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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);
+}
+
+#ifdef _LIBCPP_MOVE
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ofstream<_CharT, _Traits>::basic_ofstream(basic_ofstream&& __rhs)
+ : basic_ostream<char_type, traits_type>(_STD::move(__rhs)),
+ __sb_(_STD::move(__rhs.__sb_))
+{
+ this->set_rdbuf(&__sb_);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_ofstream<_CharT, _Traits>&
+basic_ofstream<_CharT, _Traits>::operator=(basic_ofstream&& __rhs)
+{
+ basic_ostream<char_type, traits_type>::operator=(_STD::move(__rhs));
+ __sb_ = _STD::move(__rhs.__sb_);
+ return *this;
+}
+
+#endif
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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 _LIBCPP_INLINE_VISIBILITY
+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 _LIBCPP_INLINE_VISIBILITY
+bool
+basic_ofstream<_CharT, _Traits>::is_open() const
+{
+ return __sb_.is_open();
+}
+
+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);
+}
+
+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>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+basic_ofstream<_CharT, _Traits>::close()
+{
+ if (__sb_.close() == 0)
+ this->setstate(ios_base::failbit);
+}
+
+// basic_fstream
+
+template <class _CharT, class _Traits>
+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);
+#ifdef _LIBCPP_MOVE
+ basic_fstream(basic_fstream&& __rhs);
+#endif
+
+#ifdef _LIBCPP_MOVE
+ basic_fstream& operator=(basic_fstream&& __rhs);
+#endif
+ 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 close();
+
+private:
+ basic_filebuf<char_type, traits_type> __sb_;
+};
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_fstream<_CharT, _Traits>::basic_fstream()
+ : basic_iostream<char_type, traits_type>(&__sb_)
+{
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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);
+}
+
+#ifdef _LIBCPP_MOVE
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_fstream<_CharT, _Traits>::basic_fstream(basic_fstream&& __rhs)
+ : basic_iostream<char_type, traits_type>(_STD::move(__rhs)),
+ __sb_(_STD::move(__rhs.__sb_))
+{
+ this->set_rdbuf(&__sb_);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+basic_fstream<_CharT, _Traits>&
+basic_fstream<_CharT, _Traits>::operator=(basic_fstream&& __rhs)
+{
+ basic_iostream<char_type, traits_type>::operator=(_STD::move(__rhs));
+ __sb_ = _STD::move(__rhs.__sb_);
+ return *this;
+}
+
+#endif
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+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 _LIBCPP_INLINE_VISIBILITY
+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 _LIBCPP_INLINE_VISIBILITY
+bool
+basic_fstream<_CharT, _Traits>::is_open() const
+{
+ return __sb_.is_open();
+}
+
+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);
+}
+
+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);
+}
+
+template <class _CharT, class _Traits>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+basic_fstream<_CharT, _Traits>::close()
+{
+ if (__sb_.close() == 0)
+ this->setstate(ios_base::failbit);
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_FSTREAM
