gcc/libstdc++-v3/config/c_io_stdio.cc
Scott Snyder b32a46c30c c_io_stdio.cc (seekoff): Fix return value.
2000-11-21  scott snyder  <snyder@fnal.gov>

        * config/c_io_stdio.cc (seekoff): Fix return value.
        (seekpos): Likewise.
        (sys_seek): Likewise.

From-SVN: r37648
2000-11-22 06:37:34 +00:00

263 lines
7.1 KiB
C++

// Wrapper of C-language FILE struct -*- C++ -*-
// Copyright (C) 2000 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 2, 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.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// ISO C++ 14882: 27.8 File-based streams
//
#include <bits/basic_file.h>
namespace std {
// Generic definitions for __basic_file
template<typename _CharT>
__basic_file<_CharT>::__basic_file(__c_lock* /*__lock*/)
: _M_fileno(-1), _M_cfile(NULL) { }
template<typename _CharT>
int
__basic_file<_CharT>::get_fileno(void)
{ return _M_fileno; }
template<typename _CharT>
__basic_file<_CharT>::~__basic_file()
{
if (this->is_open())
{
fflush(_M_cfile);
this->close();
}
}
template<typename _CharT>
void
__basic_file<_CharT>::_M_open_mode(ios_base::openmode __mode,
int& /*__p_mode*/, int& /*__rw_mode*/,
char* __c_mode)
{
bool __testb = __mode & ios_base::binary;
bool __testi = __mode & ios_base::in;
bool __testo = __mode & ios_base::out;
bool __testt = __mode & ios_base::trunc;
bool __testa = __mode & ios_base::app;
if (!__testi && __testo && !__testt && !__testa)
strcpy(__c_mode, "w");
if (!__testi && __testo && !__testt && __testa)
strcpy(__c_mode, "a");
if (!__testi && __testo && __testt && !__testa)
strcpy(__c_mode, "w");
if (__testi && !__testo && !__testt && !__testa)
strcpy(__c_mode, "r");
if (__testi && __testo && !__testt && !__testa)
strcpy(__c_mode, "r+");
if (__testi && __testo && __testt && !__testa)
strcpy(__c_mode, "w+");
if (__testb)
strcat(__c_mode, "b");
}
template<typename _CharT>
__basic_file<_CharT>*
__basic_file<_CharT>::sys_open(int __fd, ios_base::openmode __mode)
{
__basic_file* __ret = NULL;
int __p_mode = 0;
int __rw_mode = 0;
char __c_mode[4];
_M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
if (!this->is_open())
{
if ((_M_cfile = fdopen(__fd, __c_mode)))
{
_M_fileno = __fd;
__ret = this;
}
}
return __ret;
}
template<typename _CharT>
__basic_file<_CharT>*
__basic_file<_CharT>::open(const char* __name, ios_base::openmode __mode,
int /*__prot*/)
{
__basic_file* __ret = NULL;
int __p_mode = 0;
int __rw_mode = 0;
char __c_mode[4];
_M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
if (!this->is_open())
{
if ((_M_cfile = fopen(__name, __c_mode)))
{
_M_fileno = fileno(_M_cfile);
__ret = this;
}
}
return __ret;
}
template<typename _CharT>
bool
__basic_file<_CharT>::is_open() { return _M_fileno >= 0; }
template<typename _CharT>
__basic_file<_CharT>*
__basic_file<_CharT>::close()
{
__basic_file* __retval = static_cast<__basic_file*>(NULL);
bool __testopen = fclose(_M_cfile);
if (!__testopen)
{
__retval = this;
_M_fileno = -1;
}
return __retval;
}
template<typename _CharT>
streamsize
__basic_file<_CharT>::xsgetn(_CharT* __s, streamsize __n)
{ return fread(__s, 1, __n, _M_cfile); }
template<typename _CharT>
streamsize
__basic_file<_CharT>::xsputn(const _CharT* __s, streamsize __n)
{ return fwrite(__s, 1, __n, _M_cfile); }
template<typename _CharT>
streamoff
__basic_file<_CharT>::seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode /*__mode*/)
{ fseek(_M_cfile, __off, __way); return ftell(_M_cfile); }
template<typename _CharT>
streamoff
__basic_file<_CharT>::seekpos(streamoff __pos,
ios_base::openmode /*__mode*/)
{ fseek(_M_cfile, __pos, ios_base::beg); return ftell(_M_cfile); }
template<typename _CharT>
int
__basic_file<_CharT>::sync()
{ return fflush(_M_cfile); }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::overflow(int /*__c*/)
{ return EOF; }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::underflow()
{ return EOF; }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::uflow()
{ return EOF; }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::pbackfail(int /*__c*/)
{ return EOF; }
// NB: Unused.
template<typename _CharT>
streambuf*
__basic_file<_CharT>::setbuf(_CharT* /*__b*/, int /*__len*/)
{ return reinterpret_cast<streambuf*>(this); }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::doallocate()
{ return EOF; }
// NB: Unused.
template<typename _CharT>
streamsize
__basic_file<_CharT>::sys_read(_CharT* __s, streamsize __n)
{ return fread(__s, 1, __n, _M_cfile); }
// NB: Unused.
template<typename _CharT>
streamsize
__basic_file<_CharT>::sys_write(const _CharT* __s, streamsize __n)
{ return fwrite(__s, 1, __n, _M_cfile); }
// NB: Unused.
template<typename _CharT>
streamoff
__basic_file<_CharT>::sys_seek(streamoff __pos, ios_base::seekdir __way)
{ fseek(_M_cfile, __pos, __way); return ftell(_M_cfile); }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::sys_close()
{ return fclose(_M_cfile); }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::sys_stat(void* /*__v*/)
{ return EOF; }
// NB: Unused.
template<typename _CharT>
int
__basic_file<_CharT>::showmanyc()
{ return EOF; }
// NB: Unused.
template<typename _CharT>
void
__basic_file<_CharT>::imbue(void* /*__v*/) { }
// Need to instantiate base class here for type-info bits, etc
template struct __basic_file_base<char>;
template class __basic_file<char>;
#ifdef _GLIBCPP_USE_WCHAR_T
template struct __basic_file_base<wchar_t>;
template class __basic_file<wchar_t>;
#endif
} // namespace std