forked from higepon/mona
/
fseek.c
77 lines (74 loc) · 2.05 KB
/
fseek.c
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/*************************************************************
* Copyright (c) 2006 Shotaro Tsuji
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*************************************************************/
/* Please send bug reports to
Shotaro Tsuji
4-1010,
Sakasedai 1-chome,
Takaraduka-si,
Hyogo-ken,
665-0024
Japan
negi4d41@yahoo.co.jp
*/
#include "stdio_p.h"
#include <errno.h>
int fseek(FILE *stream, long offset, int whence)
{
register int result;
// stream->_extra->filesize = monapi_file_get_file_size(stream->_file);
fflush(stream);
switch(whence)
{
case SEEK_SET:
{
if( offset < 0 )
{
errno = EINVAL;
return 1;
}
stream->_extra->offset = offset;
break;
}
case SEEK_CUR:
{
stream->_extra->offset += offset;
break;
}
case SEEK_END:
{
stream->_extra->offset = monapi_file_get_file_size(stream->_file)-offset;
break;
}
default:
{
errno = EINVAL;
return 1;
}
}
result = stream->_seek(stream, offset, whence);
if( result != 0 )
{
errno = EBADF;
return 1;
}
return 0;
}