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Annotation of qemu/roms/openbios/fs/iso9660/iso9660_lseek.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *
        !             3:  * (c) 2005-2009 Laurent Vivier <[email protected]>
        !             4:  *
        !             5:  * This file has been copied from EMILE, http://emile.sf.net
        !             6:  *
        !             7:  */
        !             8: 
        !             9: #include "libiso9660.h"
        !            10: 
        !            11: int iso9660_lseek(iso9660_FILE *_file, long offset, int whence)
        !            12: {
        !            13:        iso9660_FILE *file = (iso9660_FILE*)_file;
        !            14:        long new_offset;
        !            15: 
        !            16:        switch(whence)
        !            17:        {
        !            18:        case SEEK_SET:
        !            19:                new_offset = offset;
        !            20:                break;
        !            21:        case SEEK_CUR:
        !            22:                new_offset = file->offset + offset;
        !            23:                break;
        !            24:        case SEEK_END:
        !            25:                new_offset = file->size + offset;
        !            26:                break;
        !            27:        default:
        !            28:                return -1;
        !            29:        }
        !            30: 
        !            31:        if ( (new_offset < 0) || (new_offset > file->size) )
        !            32:                return -1;
        !            33: 
        !            34:        file->offset = new_offset;
        !            35: 
        !            36:        return new_offset;
        !            37: }

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