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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/bits/fstream.tcc')
| -rw-r--r-- | gcc-4.4.3/libstdc++-v3/include/bits/fstream.tcc | 926 |
1 files changed, 0 insertions, 926 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/include/bits/fstream.tcc b/gcc-4.4.3/libstdc++-v3/include/bits/fstream.tcc deleted file mode 100644 index c5f7f8c52..000000000 --- a/gcc-4.4.3/libstdc++-v3/include/bits/fstream.tcc +++ /dev/null @@ -1,926 +0,0 @@ -// File based streams -*- C++ -*- - -// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, -// 2007, 2008, 2009 -// Free Software Foundation, Inc. -// -// This file is part of the GNU ISO C++ Library. This library is free -// software; you can redistribute it and/or modify it under the -// terms of the GNU General Public License as published by the -// Free Software Foundation; either version 3, or (at your option) -// any later version. - -// This library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// Under Section 7 of GPL version 3, you are granted additional -// permissions described in the GCC Runtime Library Exception, version -// 3.1, as published by the Free Software Foundation. - -// You should have received a copy of the GNU General Public License and -// a copy of the GCC Runtime Library Exception along with this program; -// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -// <http://www.gnu.org/licenses/>. - -/** @file fstream.tcc - * This is an internal header file, included by other library headers. - * You should not attempt to use it directly. - */ - -// -// ISO C++ 14882: 27.8 File-based streams -// - -#ifndef _FSTREAM_TCC -#define _FSTREAM_TCC 1 - -#pragma GCC system_header - -#include <cxxabi-forced.h> - -_GLIBCXX_BEGIN_NAMESPACE(std) - - template<typename _CharT, typename _Traits> - void - basic_filebuf<_CharT, _Traits>:: - _M_allocate_internal_buffer() - { - // Allocate internal buffer only if one doesn't already exist - // (either allocated or provided by the user via setbuf). - if (!_M_buf_allocated && !_M_buf) - { - _M_buf = new char_type[_M_buf_size]; - _M_buf_allocated = true; - } - } - - template<typename _CharT, typename _Traits> - void - basic_filebuf<_CharT, _Traits>:: - _M_destroy_internal_buffer() throw() - { - if (_M_buf_allocated) - { - delete [] _M_buf; - _M_buf = NULL; - _M_buf_allocated = false; - } - delete [] _M_ext_buf; - _M_ext_buf = NULL; - _M_ext_buf_size = 0; - _M_ext_next = NULL; - _M_ext_end = NULL; - } - - template<typename _CharT, typename _Traits> - basic_filebuf<_CharT, _Traits>:: - basic_filebuf() : __streambuf_type(), _M_lock(), _M_file(&_M_lock), - _M_mode(ios_base::openmode(0)), _M_state_beg(), _M_state_cur(), - _M_state_last(), _M_buf(NULL), _M_buf_size(BUFSIZ), - _M_buf_allocated(false), _M_reading(false), _M_writing(false), _M_pback(), - _M_pback_cur_save(0), _M_pback_end_save(0), _M_pback_init(false), - _M_codecvt(0), _M_ext_buf(0), _M_ext_buf_size(0), _M_ext_next(0), - _M_ext_end(0) - { - if (has_facet<__codecvt_type>(this->_M_buf_locale)) - _M_codecvt = &use_facet<__codecvt_type>(this->_M_buf_locale); - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::__filebuf_type* - basic_filebuf<_CharT, _Traits>:: - open(const char* __s, ios_base::openmode __mode) - { - __filebuf_type *__ret = NULL; - if (!this->is_open()) - { - _M_file.open(__s, __mode); - if (this->is_open()) - { - _M_allocate_internal_buffer(); - _M_mode = __mode; - - // Setup initial buffer to 'uncommitted' mode. - _M_reading = false; - _M_writing = false; - _M_set_buffer(-1); - - // Reset to initial state. - _M_state_last = _M_state_cur = _M_state_beg; - - // 27.8.1.3,4 - if ((__mode & ios_base::ate) - && this->seekoff(0, ios_base::end, __mode) - == pos_type(off_type(-1))) - this->close(); - else - __ret = this; - } - } - return __ret; - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::__filebuf_type* - basic_filebuf<_CharT, _Traits>:: - close() - { - if (!this->is_open()) - return NULL; - - bool __testfail = false; - { - // NB: Do this here so that re-opened filebufs will be cool... - struct __close_sentry - { - basic_filebuf *__fb; - __close_sentry (basic_filebuf *__fbi): __fb(__fbi) { } - ~__close_sentry () - { - __fb->_M_mode = ios_base::openmode(0); - __fb->_M_pback_init = false; - __fb->_M_destroy_internal_buffer(); - __fb->_M_reading = false; - __fb->_M_writing = false; - __fb->_M_set_buffer(-1); - __fb->_M_state_last = __fb->_M_state_cur = __fb->_M_state_beg; - } - } __cs (this); - - __try - { - if (!_M_terminate_output()) - __testfail = true; - } - __catch(__cxxabiv1::__forced_unwind&) - { - _M_file.close(); - __throw_exception_again; - } - __catch(...) - { __testfail = true; } - } - - if (!_M_file.close()) - __testfail = true; - - if (__testfail) - return NULL; - else - return this; - } - - template<typename _CharT, typename _Traits> - streamsize - basic_filebuf<_CharT, _Traits>:: - showmanyc() - { - streamsize __ret = -1; - const bool __testin = _M_mode & ios_base::in; - if (__testin && this->is_open()) - { - // For a stateful encoding (-1) the pending sequence might be just - // shift and unshift prefixes with no actual character. - __ret = this->egptr() - this->gptr(); - -#if _GLIBCXX_HAVE_DOS_BASED_FILESYSTEM - // About this workaround, see libstdc++/20806. - const bool __testbinary = _M_mode & ios_base::binary; - if (__check_facet(_M_codecvt).encoding() >= 0 - && __testbinary) -#else - if (__check_facet(_M_codecvt).encoding() >= 0) -#endif - __ret += _M_file.showmanyc() / _M_codecvt->max_length(); - } - return __ret; - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::int_type - basic_filebuf<_CharT, _Traits>:: - underflow() - { - int_type __ret = traits_type::eof(); - const bool __testin = _M_mode & ios_base::in; - if (__testin && !_M_writing) - { - // Check for pback madness, and if so switch back to the - // normal buffers and jet outta here before expensive - // fileops happen... - _M_destroy_pback(); - - if (this->gptr() < this->egptr()) - return traits_type::to_int_type(*this->gptr()); - - // Get and convert input sequence. - const size_t __buflen = _M_buf_size > 1 ? _M_buf_size - 1 : 1; - - // Will be set to true if ::read() returns 0 indicating EOF. - bool __got_eof = false; - // Number of internal characters produced. - streamsize __ilen = 0; - codecvt_base::result __r = codecvt_base::ok; - if (__check_facet(_M_codecvt).always_noconv()) - { - __ilen = _M_file.xsgetn(reinterpret_cast<char*>(this->eback()), - __buflen); - if (__ilen == 0) - __got_eof = true; - } - else - { - // Worst-case number of external bytes. - // XXX Not done encoding() == -1. - const int __enc = _M_codecvt->encoding(); - streamsize __blen; // Minimum buffer size. - streamsize __rlen; // Number of chars to read. - if (__enc > 0) - __blen = __rlen = __buflen * __enc; - else - { - __blen = __buflen + _M_codecvt->max_length() - 1; - __rlen = __buflen; - } - const streamsize __remainder = _M_ext_end - _M_ext_next; - __rlen = __rlen > __remainder ? __rlen - __remainder : 0; - - // An imbue in 'read' mode implies first converting the external - // chars already present. - if (_M_reading && this->egptr() == this->eback() && __remainder) - __rlen = 0; - - // Allocate buffer if necessary and move unconverted - // bytes to front. - if (_M_ext_buf_size < __blen) - { - char* __buf = new char[__blen]; - if (__remainder) - __builtin_memcpy(__buf, _M_ext_next, __remainder); - - delete [] _M_ext_buf; - _M_ext_buf = __buf; - _M_ext_buf_size = __blen; - } - else if (__remainder) - __builtin_memmove(_M_ext_buf, _M_ext_next, __remainder); - - _M_ext_next = _M_ext_buf; - _M_ext_end = _M_ext_buf + __remainder; - _M_state_last = _M_state_cur; - - do - { - if (__rlen > 0) - { - // Sanity check! - // This may fail if the return value of - // codecvt::max_length() is bogus. - if (_M_ext_end - _M_ext_buf + __rlen > _M_ext_buf_size) - { - __throw_ios_failure(__N("basic_filebuf::underflow " - "codecvt::max_length() " - "is not valid")); - } - streamsize __elen = _M_file.xsgetn(_M_ext_end, __rlen); - if (__elen == 0) - __got_eof = true; - else if (__elen == -1) - break; - _M_ext_end += __elen; - } - - char_type* __iend = this->eback(); - if (_M_ext_next < _M_ext_end) - __r = _M_codecvt->in(_M_state_cur, _M_ext_next, - _M_ext_end, _M_ext_next, - this->eback(), - this->eback() + __buflen, __iend); - if (__r == codecvt_base::noconv) - { - size_t __avail = _M_ext_end - _M_ext_buf; - __ilen = std::min(__avail, __buflen); - traits_type::copy(this->eback(), - reinterpret_cast<char_type*> - (_M_ext_buf), __ilen); - _M_ext_next = _M_ext_buf + __ilen; - } - else - __ilen = __iend - this->eback(); - - // _M_codecvt->in may return error while __ilen > 0: this is - // ok, and actually occurs in case of mixed encodings (e.g., - // XML files). - if (__r == codecvt_base::error) - break; - - __rlen = 1; - } - while (__ilen == 0 && !__got_eof); - } - - if (__ilen > 0) - { - _M_set_buffer(__ilen); - _M_reading = true; - __ret = traits_type::to_int_type(*this->gptr()); - } - else if (__got_eof) - { - // If the actual end of file is reached, set 'uncommitted' - // mode, thus allowing an immediate write without an - // intervening seek. - _M_set_buffer(-1); - _M_reading = false; - // However, reaching it while looping on partial means that - // the file has got an incomplete character. - if (__r == codecvt_base::partial) - __throw_ios_failure(__N("basic_filebuf::underflow " - "incomplete character in file")); - } - else if (__r == codecvt_base::error) - __throw_ios_failure(__N("basic_filebuf::underflow " - "invalid byte sequence in file")); - else - __throw_ios_failure(__N("basic_filebuf::underflow " - "error reading the file")); - } - return __ret; - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::int_type - basic_filebuf<_CharT, _Traits>:: - pbackfail(int_type __i) - { - int_type __ret = traits_type::eof(); - const bool __testin = _M_mode & ios_base::in; - if (__testin && !_M_writing) - { - // Remember whether the pback buffer is active, otherwise below - // we may try to store in it a second char (libstdc++/9761). - const bool __testpb = _M_pback_init; - const bool __testeof = traits_type::eq_int_type(__i, __ret); - int_type __tmp; - if (this->eback() < this->gptr()) - { - this->gbump(-1); - __tmp = traits_type::to_int_type(*this->gptr()); - } - else if (this->seekoff(-1, ios_base::cur) != pos_type(off_type(-1))) - { - __tmp = this->underflow(); - if (traits_type::eq_int_type(__tmp, __ret)) - return __ret; - } - else - { - // At the beginning of the buffer, need to make a - // putback position available. But the seek may fail - // (f.i., at the beginning of a file, see - // libstdc++/9439) and in that case we return - // traits_type::eof(). - return __ret; - } - - // Try to put back __i into input sequence in one of three ways. - // Order these tests done in is unspecified by the standard. - if (!__testeof && traits_type::eq_int_type(__i, __tmp)) - __ret = __i; - else if (__testeof) - __ret = traits_type::not_eof(__i); - else if (!__testpb) - { - _M_create_pback(); - _M_reading = true; - *this->gptr() = traits_type::to_char_type(__i); - __ret = __i; - } - } - return __ret; - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::int_type - basic_filebuf<_CharT, _Traits>:: - overflow(int_type __c) - { - int_type __ret = traits_type::eof(); - const bool __testeof = traits_type::eq_int_type(__c, __ret); - const bool __testout = _M_mode & ios_base::out; - if (__testout && !_M_reading) - { - if (this->pbase() < this->pptr()) - { - // If appropriate, append the overflow char. - if (!__testeof) - { - *this->pptr() = traits_type::to_char_type(__c); - this->pbump(1); - } - - // Convert pending sequence to external representation, - // and output. - if (_M_convert_to_external(this->pbase(), - this->pptr() - this->pbase())) - { - _M_set_buffer(0); - __ret = traits_type::not_eof(__c); - } - } - else if (_M_buf_size > 1) - { - // Overflow in 'uncommitted' mode: set _M_writing, set - // the buffer to the initial 'write' mode, and put __c - // into the buffer. - _M_set_buffer(0); - _M_writing = true; - if (!__testeof) - { - *this->pptr() = traits_type::to_char_type(__c); - this->pbump(1); - } - __ret = traits_type::not_eof(__c); - } - else - { - // Unbuffered. - char_type __conv = traits_type::to_char_type(__c); - if (__testeof || _M_convert_to_external(&__conv, 1)) - { - _M_writing = true; - __ret = traits_type::not_eof(__c); - } - } - } - return __ret; - } - - template<typename _CharT, typename _Traits> - bool - basic_filebuf<_CharT, _Traits>:: - _M_convert_to_external(_CharT* __ibuf, streamsize __ilen) - { - // Sizes of external and pending output. - streamsize __elen; - streamsize __plen; - if (__check_facet(_M_codecvt).always_noconv()) - { - __elen = _M_file.xsputn(reinterpret_cast<char*>(__ibuf), __ilen); - __plen = __ilen; - } - else - { - // Worst-case number of external bytes needed. - // XXX Not done encoding() == -1. - streamsize __blen = __ilen * _M_codecvt->max_length(); - char* __buf = static_cast<char*>(__builtin_alloca(__blen)); - - char* __bend; - const char_type* __iend; - codecvt_base::result __r; - __r = _M_codecvt->out(_M_state_cur, __ibuf, __ibuf + __ilen, - __iend, __buf, __buf + __blen, __bend); - - if (__r == codecvt_base::ok || __r == codecvt_base::partial) - __blen = __bend - __buf; - else if (__r == codecvt_base::noconv) - { - // Same as the always_noconv case above. - __buf = reinterpret_cast<char*>(__ibuf); - __blen = __ilen; - } - else - __throw_ios_failure(__N("basic_filebuf::_M_convert_to_external " - "conversion error")); - - __elen = _M_file.xsputn(__buf, __blen); - __plen = __blen; - - // Try once more for partial conversions. - if (__r == codecvt_base::partial && __elen == __plen) - { - const char_type* __iresume = __iend; - streamsize __rlen = this->pptr() - __iend; - __r = _M_codecvt->out(_M_state_cur, __iresume, - __iresume + __rlen, __iend, __buf, - __buf + __blen, __bend); - if (__r != codecvt_base::error) - { - __rlen = __bend - __buf; - __elen = _M_file.xsputn(__buf, __rlen); - __plen = __rlen; - } - else - __throw_ios_failure(__N("basic_filebuf::_M_convert_to_external " - "conversion error")); - } - } - return __elen == __plen; - } - - template<typename _CharT, typename _Traits> - streamsize - basic_filebuf<_CharT, _Traits>:: - xsgetn(_CharT* __s, streamsize __n) - { - // Clear out pback buffer before going on to the real deal... - streamsize __ret = 0; - if (_M_pback_init) - { - if (__n > 0 && this->gptr() == this->eback()) - { - *__s++ = *this->gptr(); - this->gbump(1); - __ret = 1; - --__n; - } - _M_destroy_pback(); - } - - // Optimization in the always_noconv() case, to be generalized in the - // future: when __n > __buflen we read directly instead of using the - // buffer repeatedly. - const bool __testin = _M_mode & ios_base::in; - const streamsize __buflen = _M_buf_size > 1 ? _M_buf_size - 1 : 1; - - if (__n > __buflen && __check_facet(_M_codecvt).always_noconv() - && __testin && !_M_writing) - { - // First, copy the chars already present in the buffer. - const streamsize __avail = this->egptr() - this->gptr(); - if (__avail != 0) - { - if (__avail == 1) - *__s = *this->gptr(); - else - traits_type::copy(__s, this->gptr(), __avail); - __s += __avail; - this->gbump(__avail); - __ret += __avail; - __n -= __avail; - } - - // Need to loop in case of short reads (relatively common - // with pipes). - streamsize __len; - for (;;) - { - __len = _M_file.xsgetn(reinterpret_cast<char*>(__s), - __n); - if (__len == -1) - __throw_ios_failure(__N("basic_filebuf::xsgetn " - "error reading the file")); - if (__len == 0) - break; - - __n -= __len; - __ret += __len; - if (__n == 0) - break; - - __s += __len; - } - - if (__n == 0) - { - _M_set_buffer(0); - _M_reading = true; - } - else if (__len == 0) - { - // If end of file is reached, set 'uncommitted' - // mode, thus allowing an immediate write without - // an intervening seek. - _M_set_buffer(-1); - _M_reading = false; - } - } - else - __ret += __streambuf_type::xsgetn(__s, __n); - - return __ret; - } - - template<typename _CharT, typename _Traits> - streamsize - basic_filebuf<_CharT, _Traits>:: - xsputn(const _CharT* __s, streamsize __n) - { - // Optimization in the always_noconv() case, to be generalized in the - // future: when __n is sufficiently large we write directly instead of - // using the buffer. - streamsize __ret = 0; - const bool __testout = _M_mode & ios_base::out; - if (__check_facet(_M_codecvt).always_noconv() - && __testout && !_M_reading) - { - // Measurement would reveal the best choice. - const streamsize __chunk = 1ul << 10; - streamsize __bufavail = this->epptr() - this->pptr(); - - // Don't mistake 'uncommitted' mode buffered with unbuffered. - if (!_M_writing && _M_buf_size > 1) - __bufavail = _M_buf_size - 1; - - const streamsize __limit = std::min(__chunk, __bufavail); - if (__n >= __limit) - { - const streamsize __buffill = this->pptr() - this->pbase(); - const char* __buf = reinterpret_cast<const char*>(this->pbase()); - __ret = _M_file.xsputn_2(__buf, __buffill, - reinterpret_cast<const char*>(__s), - __n); - if (__ret == __buffill + __n) - { - _M_set_buffer(0); - _M_writing = true; - } - if (__ret > __buffill) - __ret -= __buffill; - else - __ret = 0; - } - else - __ret = __streambuf_type::xsputn(__s, __n); - } - else - __ret = __streambuf_type::xsputn(__s, __n); - return __ret; - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::__streambuf_type* - basic_filebuf<_CharT, _Traits>:: - setbuf(char_type* __s, streamsize __n) - { - if (!this->is_open()) - { - if (__s == 0 && __n == 0) - _M_buf_size = 1; - else if (__s && __n > 0) - { - // This is implementation-defined behavior, and assumes that - // an external char_type array of length __n exists and has - // been pre-allocated. If this is not the case, things will - // quickly blow up. When __n > 1, __n - 1 positions will be - // used for the get area, __n - 1 for the put area and 1 - // position to host the overflow char of a full put area. - // When __n == 1, 1 position will be used for the get area - // and 0 for the put area, as in the unbuffered case above. - _M_buf = __s; - _M_buf_size = __n; - } - } - return this; - } - - - // According to 27.8.1.4 p11 - 13, seekoff should ignore the last - // argument (of type openmode). - template<typename _CharT, typename _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 = 0; - if (_M_codecvt) - __width = _M_codecvt->encoding(); - if (__width < 0) - __width = 0; - - pos_type __ret = pos_type(off_type(-1)); - const bool __testfail = __off != 0 && __width <= 0; - if (this->is_open() && !__testfail) - { - // Ditch any pback buffers to avoid confusion. - _M_destroy_pback(); - - // Correct state at destination. Note that this is the correct - // state for the current position during output, because - // codecvt::unshift() returns the state to the initial state. - // This is also the correct state at the end of the file because - // an unshift sequence should have been written at the end. - __state_type __state = _M_state_beg; - off_type __computed_off = __off * __width; - if (_M_reading && __way == ios_base::cur) - { - if (_M_codecvt->always_noconv()) - __computed_off += this->gptr() - this->egptr(); - else - { - // Calculate offset from _M_ext_buf that corresponds - // to gptr(). Note: uses _M_state_last, which - // corresponds to eback(). - const int __gptr_off = - _M_codecvt->length(_M_state_last, _M_ext_buf, _M_ext_next, - this->gptr() - this->eback()); - __computed_off += _M_ext_buf + __gptr_off - _M_ext_end; - - // _M_state_last is modified by codecvt::length() so - // it now corresponds to gptr(). - __state = _M_state_last; - } - } - __ret = _M_seek(__computed_off, __way, __state); - } - return __ret; - } - - // _GLIBCXX_RESOLVE_LIB_DEFECTS - // 171. Strange seekpos() semantics due to joint position - // According to the resolution of DR 171, seekpos should ignore the last - // argument (of type openmode). - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::pos_type - basic_filebuf<_CharT, _Traits>:: - seekpos(pos_type __pos, ios_base::openmode) - { - pos_type __ret = pos_type(off_type(-1)); - if (this->is_open()) - { - // Ditch any pback buffers to avoid confusion. - _M_destroy_pback(); - __ret = _M_seek(off_type(__pos), ios_base::beg, __pos.state()); - } - return __ret; - } - - template<typename _CharT, typename _Traits> - typename basic_filebuf<_CharT, _Traits>::pos_type - basic_filebuf<_CharT, _Traits>:: - _M_seek(off_type __off, ios_base::seekdir __way, __state_type __state) - { - pos_type __ret = pos_type(off_type(-1)); - if (_M_terminate_output()) - { - // Returns pos_type(off_type(-1)) in case of failure. - __ret = pos_type(_M_file.seekoff(__off, __way)); - if (__ret != pos_type(off_type(-1))) - { - _M_reading = false; - _M_writing = false; - _M_ext_next = _M_ext_end = _M_ext_buf; - _M_set_buffer(-1); - _M_state_cur = __state; - __ret.state(_M_state_cur); - } - } - return __ret; - } - - template<typename _CharT, typename _Traits> - bool - basic_filebuf<_CharT, _Traits>:: - _M_terminate_output() - { - // Part one: update the output sequence. - bool __testvalid = true; - if (this->pbase() < this->pptr()) - { - const int_type __tmp = this->overflow(); - if (traits_type::eq_int_type(__tmp, traits_type::eof())) - __testvalid = false; - } - - // Part two: output unshift sequence. - if (_M_writing && !__check_facet(_M_codecvt).always_noconv() - && __testvalid) - { - // Note: this value is arbitrary, since there is no way to - // get the length of the unshift sequence from codecvt, - // without calling unshift. - const size_t __blen = 128; - char __buf[__blen]; - codecvt_base::result __r; - streamsize __ilen = 0; - - do - { - char* __next; - __r = _M_codecvt->unshift(_M_state_cur, __buf, - __buf + __blen, __next); - if (__r == codecvt_base::error) - __testvalid = false; - else if (__r == codecvt_base::ok || - __r == codecvt_base::partial) - { - __ilen = __next - __buf; - if (__ilen > 0) - { - const streamsize __elen = _M_file.xsputn(__buf, __ilen); - if (__elen != __ilen) - __testvalid = false; - } - } - } - while (__r == codecvt_base::partial && __ilen > 0 && __testvalid); - - if (__testvalid) - { - // This second call to overflow() is required by the standard, - // but it's not clear why it's needed, since the output buffer - // should be empty by this point (it should have been emptied - // in the first call to overflow()). - const int_type __tmp = this->overflow(); - if (traits_type::eq_int_type(__tmp, traits_type::eof())) - __testvalid = false; - } - } - return __testvalid; - } - - template<typename _CharT, typename _Traits> - int - basic_filebuf<_CharT, _Traits>:: - sync() - { - // Make sure that the internal buffer resyncs its idea of - // the file position with the external file. - int __ret = 0; - if (this->pbase() < this->pptr()) - { - const int_type __tmp = this->overflow(); - if (traits_type::eq_int_type(__tmp, traits_type::eof())) - __ret = -1; - } - return __ret; - } - - template<typename _CharT, typename _Traits> - void - basic_filebuf<_CharT, _Traits>:: - imbue(const locale& __loc) - { - bool __testvalid = true; - - const __codecvt_type* _M_codecvt_tmp = 0; - if (__builtin_expect(has_facet<__codecvt_type>(__loc), true)) - _M_codecvt_tmp = &use_facet<__codecvt_type>(__loc); - - if (this->is_open()) - { - // encoding() == -1 is ok only at the beginning. - if ((_M_reading || _M_writing) - && __check_facet(_M_codecvt).encoding() == -1) - __testvalid = false; - else - { - if (_M_reading) - { - if (__check_facet(_M_codecvt).always_noconv()) - { - if (_M_codecvt_tmp - && !__check_facet(_M_codecvt_tmp).always_noconv()) - __testvalid = this->seekoff(0, ios_base::cur, _M_mode) - != pos_type(off_type(-1)); - } - else - { - // External position corresponding to gptr(). - _M_ext_next = _M_ext_buf - + _M_codecvt->length(_M_state_last, _M_ext_buf, _M_ext_next, - this->gptr() - this->eback()); - const streamsize __remainder = _M_ext_end - _M_ext_next; - if (__remainder) - __builtin_memmove(_M_ext_buf, _M_ext_next, __remainder); - - _M_ext_next = _M_ext_buf; - _M_ext_end = _M_ext_buf + __remainder; - _M_set_buffer(-1); - _M_state_last = _M_state_cur = _M_state_beg; - } - } - else if (_M_writing && (__testvalid = _M_terminate_output())) - _M_set_buffer(-1); - } - } - - if (__testvalid) - _M_codecvt = _M_codecvt_tmp; - else - _M_codecvt = 0; - } - - // Inhibit implicit instantiations for required instantiations, - // which are defined via explicit instantiations elsewhere. - // NB: This syntax is a GNU extension. -#if _GLIBCXX_EXTERN_TEMPLATE - extern template class basic_filebuf<char>; - extern template class basic_ifstream<char>; - extern template class basic_ofstream<char>; - extern template class basic_fstream<char>; - -#ifdef _GLIBCXX_USE_WCHAR_T - extern template class basic_filebuf<wchar_t>; - extern template class basic_ifstream<wchar_t>; - extern template class basic_ofstream<wchar_t>; - extern template class basic_fstream<wchar_t>; -#endif -#endif - -_GLIBCXX_END_NAMESPACE - -#endif |