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/* file.c: File-related compatibility routines
Copyright (c) 2008 Philip Kendall
$Id: file.c 4072 2009-08-31 15:42:26Z specu $
This program 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 of the License, or
(at your option) any later version.
This program 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 program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include <config.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "compat.h"
#include "utils.h"
#include "ui/ui.h"
const compat_fd COMPAT_FILE_OPEN_FAILED = NULL;
compat_fd
compat_file_open( const char *path, int write )
{
return fopen( path, write ? "wb" : "rb" );
}
off_t
compat_file_get_length( compat_fd fd )
{
struct stat file_info;
if( fstat( fileno( fd ), &file_info ) ) {
ui_error( UI_ERROR_ERROR, "couldn't stat file: %s", strerror( errno ) );
return -1;
}
return file_info.st_size;
}
int
compat_file_read( compat_fd fd, utils_file *file )
{
size_t bytes = fread( file->buffer, 1, file->length, fd );
if( bytes != file->length ) {
ui_error( UI_ERROR_ERROR,
"error reading file: expected %lu bytes, but read only %lu",
file->length, bytes );
return 1;
}
return 0;
}
int
compat_file_write( compat_fd fd, const unsigned char *buffer, size_t length )
{
size_t bytes = fwrite( buffer, 1, length, fd );
if( bytes != length ) {
ui_error( UI_ERROR_ERROR,
"error writing file: expected %lu bytes, but wrote only %lu",
length, bytes );
return 1;
}
return 0;
}
int
compat_file_close( compat_fd fd )
{
return fclose( fd );
}
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