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// Wrapper of C-language FILE struct -*- C++ -*-
// Copyright (C) 2000, 2001, 2002, 2003 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>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#ifdef _GLIBCXX_HAVE_SYS_IOCTL_H
#define BSD_COMP /* Get FIONREAD on Solaris2. */
#include <sys/ioctl.h>
#endif
// Pick up FIONREAD on Solaris 2.5.
#ifdef _GLIBCXX_HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#ifdef _GLIBCXX_HAVE_POLL
#include <poll.h>
#endif
#if defined(_GLIBCXX_HAVE_S_ISREG) || defined(_GLIBCXX_HAVE_S_IFREG)
# include <sys/stat.h>
# ifdef _GLIBCXX_HAVE_S_ISREG
# define _GLIBCXX_ISREG(x) S_ISREG(x)
# else
# define _GLIBCXX_ISREG(x) (((x) & S_IFMT) == S_IFREG)
# endif
#endif
namespace std
{
// Definitions for __basic_file<char>.
__basic_file<char>::__basic_file(__c_lock* /*__lock*/)
: _M_cfile(NULL), _M_cfile_created(false) { }
__basic_file<char>::~__basic_file()
{ this->close(); }
void
__basic_file<char>::_M_open_mode(ios_base::openmode __mode, int& __p_mode,
int&, 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;
// Set __c_mode for use in fopen.
// Set __p_mode for use in open.
if (!__testi && __testo && !__testt && !__testa)
{
strcpy(__c_mode, "w");
__p_mode = (O_WRONLY | O_CREAT);
}
if (!__testi && __testo && !__testt && __testa)
{
strcpy(__c_mode, "a");
__p_mode |= O_WRONLY | O_CREAT | O_APPEND;
}
if (!__testi && __testo && __testt && !__testa)
{
strcpy(__c_mode, "w");
__p_mode |= O_WRONLY | O_CREAT | O_TRUNC;
}
if (__testi && !__testo && !__testt && !__testa)
{
strcpy(__c_mode, "r");
__p_mode |= O_RDONLY;
}
if (__testi && __testo && !__testt && !__testa)
{
strcpy(__c_mode, "r+");
__p_mode |= O_RDWR | O_CREAT;
}
if (__testi && __testo && __testt && !__testa)
{
strcpy(__c_mode, "w+");
__p_mode |= O_RDWR | O_CREAT | O_TRUNC;
}
if (__testb)
strcat(__c_mode, "b");
}
__basic_file<char>*
__basic_file<char>::sys_open(__c_file* __file, ios_base::openmode)
{
__basic_file* __ret = NULL;
if (!this->is_open() && __file)
{
_M_cfile = __file;
_M_cfile_created = false;
__ret = this;
}
return __ret;
}
__basic_file<char>*
__basic_file<char>::sys_open(int __fd, ios_base::openmode __mode,
bool __del)
{
__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() && (_M_cfile = fdopen(__fd, __c_mode)))
{
// Iff __del is true, then close will fclose the fd.
_M_cfile_created = __del;
if (__fd == 0)
setvbuf(_M_cfile, reinterpret_cast<char*>(NULL), _IONBF, 0);
__ret = this;
}
return __ret;
}
int
__basic_file<char>::sys_getc()
{ return getc(_M_cfile); }
int
__basic_file<char>::sys_ungetc(int __c)
{ return ungetc(__c, _M_cfile); }
__basic_file<char>*
__basic_file<char>::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_cfile_created = true;
__ret = this;
}
}
return __ret;
}
bool
__basic_file<char>::is_open() const
{ return _M_cfile != 0; }
int
__basic_file<char>::fd()
{ return fileno(_M_cfile) ; }
__basic_file<char>*
__basic_file<char>::close()
{
__basic_file* __retval = static_cast<__basic_file*>(NULL);
if (this->is_open())
{
if (_M_cfile_created)
fclose(_M_cfile);
else
fflush(_M_cfile);
_M_cfile = 0;
__retval = this;
}
return __retval;
}
streamsize
__basic_file<char>::xsgetn(char* __s, streamsize __n)
{
streamsize __ret;
do
__ret = read(this->fd(), __s, __n);
while (__ret == -1L && errno == EINTR);
return __ret;
}
streamsize
__basic_file<char>::xsputn(const char* __s, streamsize __n)
{
streamsize __ret;
do
__ret = write(this->fd(), __s, __n);
while (__ret == -1L && errno == EINTR);
return __ret;
}
streampos
__basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
ios_base::openmode /*__mode*/)
{ return lseek(this->fd(), __off, __way); }
streampos
__basic_file<char>::seekpos(streampos __pos, ios_base::openmode /*__mode*/)
{ return lseek(this->fd(), __pos, ios_base::beg); }
int
__basic_file<char>::sync()
{ return fflush(_M_cfile); }
streamsize
__basic_file<char>::showmanyc()
{
#ifdef FIONREAD
// Pipes and sockets.
int __num = 0;
int __r = ioctl(this->fd(), FIONREAD, &__num);
if (!__r && __num >= 0)
return __num;
#endif
#ifdef _GLIBCXX_HAVE_POLL
// Cheap test.
struct pollfd __pfd[1];
__pfd[0].fd = this->fd();
__pfd[0].events = POLLIN;
if (poll(__pfd, 1, 0) <= 0)
return 0;
#endif
#if defined(_GLIBCXX_HAVE_S_ISREG) || defined(_GLIBCXX_HAVE_S_IFREG)
// Regular files.
struct stat __buffer;
int __ret = fstat(this->fd(), &__buffer);
if (!__ret && _GLIBCXX_ISREG(__buffer.st_mode))
return __buffer.st_size - lseek(this->fd(), 0, ios_base::cur);
#endif
return 0;
}
} // namespace std
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