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Annotation of embedaddon/php/ext/zip/lib/zip_file_get_offset.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:   zip_file_get_offset.c -- get offset of file data in archive.
                      3:   Copyright (C) 1999-2007 Dieter Baron and Thomas Klausner
                      4: 
                      5:   This file is part of libzip, a library to manipulate ZIP archives.
                      6:   The authors can be contacted at <libzip@nih.at>
                      7: 
                      8:   Redistribution and use in source and binary forms, with or without
                      9:   modification, are permitted provided that the following conditions
                     10:   are met:
                     11:   1. Redistributions of source code must retain the above copyright
                     12:      notice, this list of conditions and the following disclaimer.
                     13:   2. Redistributions in binary form must reproduce the above copyright
                     14:      notice, this list of conditions and the following disclaimer in
                     15:      the documentation and/or other materials provided with the
                     16:      distribution.
                     17:   3. The names of the authors may not be used to endorse or promote
                     18:      products derived from this software without specific prior
                     19:      written permission.
                     20:  
                     21:   THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
                     22:   OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
                     23:   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
                     25:   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
                     27:   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     28:   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
                     29:   IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
                     30:   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
                     31:   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     32: */
                     33: 
                     34: 
                     35: 
                     36: #include <stdio.h>
                     37: #include <stdlib.h>
                     38: #include <string.h>
                     39: #include <errno.h>
                     40: #include <sys/types.h>
                     41: #include <sys/stat.h>
                     42: 
                     43: #include "zipint.h"
                     44: 
                     45: 
                     46: 
                     47: /* _zip_file_get_offset(za, ze):
                     48:    Returns the offset of the file data for entry ze.
                     49: 
                     50:    On error, fills in za->error and returns 0.
                     51: */
                     52: 
                     53: unsigned int
                     54: _zip_file_get_offset(struct zip *za, int idx)
                     55: {
                     56:     struct zip_dirent de;
                     57:     unsigned int offset;
                     58: 
                     59:     offset = za->cdir->entry[idx].offset;
                     60: 
                     61:     if (fseeko(za->zp, offset, SEEK_SET) != 0) {
                     62:        _zip_error_set(&za->error, ZIP_ER_SEEK, errno);
                     63:        return 0;
                     64:     }
                     65: 
                     66:     if (_zip_dirent_read(&de, za->zp, NULL, NULL, 1, &za->error) != 0)
                     67:        return 0;
                     68: 
                     69:     offset += LENTRYSIZE + de.filename_len + de.extrafield_len;
                     70: 
                     71:     _zip_dirent_finalize(&de);
                     72: 
                     73:     return offset;
                     74: }