EMILE/libiso9660/iso9660_lseek.c

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/*
*
* (c) 2005 Laurent Vivier <Laurent@lvivier.info>
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*
*/
#include <stdio.h>
#include "libiso9660.h"
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int iso9660_lseek(iso9660_FILE *file, long offset, int whence)
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{
long new_offset;
switch(whence)
{
case SEEK_SET:
new_offset = offset;
break;
case SEEK_CUR:
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new_offset = file->offset + offset;
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break;
case SEEK_END:
new_offset = file->size + offset;
break;
default:
return -1;
}
if ( (new_offset < 0) || (new_offset > file->size) )
return -1;
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file->offset = new_offset;
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return new_offset;
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}