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add fseek()

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This commit is contained in:
Laurent Vivier 2005-11-14 19:29:07 +00:00
parent 1d9d4b7255
commit 383b010988
1 changed files with 38 additions and 0 deletions
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38
libiso9660/iso9660_fseek.c Normal file
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@ -0,0 +1,38 @@
/*
*
* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <stdio.h>
#include "libiso9660.h"
extern iso9660_read_t __iso9660_device_read;
int iso9660_fseek(iso9660_FILE *file, long offset, int whence)
{
long new_offset;
switch(whence)
{
case SEEK_SET:
new_offset = offset;
break;
case SEEK_CUR:
new_offset += offset;
break;
case SEEK_END:
new_offset = file->size + offset;
break;
default:
return -1;
}
if ( (new_offset < 0) || (new_offset > file->size) )
return -1;
file->offset = offset;
return 0;
}