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: }
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