/src/libzip/lib/zip_unchange.c
Line | Count | Source |
1 | | /* |
2 | | zip_unchange.c -- undo changes to file in zip archive |
3 | | Copyright (C) 1999-2022 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 <info@libzip.org> |
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 | | #include <stdlib.h> |
36 | | |
37 | | #include "zipint.h" |
38 | | |
39 | | |
40 | 0 | ZIP_EXTERN int zip_unchange(zip_t *za, zip_uint64_t idx) { |
41 | 0 | return _zip_unchange(za, idx, 0); |
42 | 0 | } |
43 | | |
44 | | |
45 | 481 | int _zip_unchange(zip_t *za, zip_uint64_t idx, int allow_duplicates) { |
46 | 481 | zip_int64_t i; |
47 | 481 | bool renamed; |
48 | | |
49 | 481 | if (idx >= za->nentry) { |
50 | 0 | zip_error_set(&za->error, ZIP_ER_INVAL, 0); |
51 | 0 | return -1; |
52 | 0 | } |
53 | | |
54 | 481 | renamed = za->entry[idx].changes && (za->entry[idx].changes->changed & ZIP_DIRENT_FILENAME); |
55 | 481 | if (!allow_duplicates && (renamed || za->entry[idx].deleted)) { |
56 | 0 | const char *orig_name = NULL; |
57 | 0 | const char *changed_name = NULL; |
58 | |
|
59 | 0 | if (za->entry[idx].orig != NULL) { |
60 | 0 | if ((orig_name = _zip_get_name(za, idx, ZIP_FL_UNCHANGED, &za->error)) == NULL) { |
61 | 0 | return -1; |
62 | 0 | } |
63 | | |
64 | 0 | i = _zip_name_locate(za, orig_name, 0, NULL); |
65 | 0 | if (i >= 0 && (zip_uint64_t)i != idx) { |
66 | 0 | zip_error_set(&za->error, ZIP_ER_EXISTS, 0); |
67 | 0 | return -1; |
68 | 0 | } |
69 | 0 | } |
70 | | |
71 | 0 | if (renamed) { |
72 | 0 | if ((changed_name = _zip_get_name(za, idx, 0, &za->error)) == NULL) { |
73 | 0 | return -1; |
74 | 0 | } |
75 | 0 | } |
76 | | |
77 | 0 | if (orig_name) { |
78 | 0 | if (_zip_hash_add(za->names, (const zip_uint8_t *)orig_name, idx, 0, &za->error) == false) { |
79 | 0 | return -1; |
80 | 0 | } |
81 | 0 | } |
82 | 0 | if (changed_name) { |
83 | 0 | if (_zip_hash_delete(za->names, (const zip_uint8_t *)changed_name, &za->error) == false) { |
84 | 0 | _zip_hash_delete(za->names, (const zip_uint8_t *)orig_name, NULL); |
85 | 0 | return -1; |
86 | 0 | } |
87 | 0 | } |
88 | 0 | } |
89 | | |
90 | 481 | _zip_dirent_free(za->entry[idx].changes); |
91 | 481 | za->entry[idx].changes = NULL; |
92 | | |
93 | 481 | _zip_unchange_data(za->entry + idx); |
94 | | |
95 | 481 | return 0; |
96 | 481 | } |