4
|
1 /* |
|
2 zip_file_set_comment.c -- set comment for file in archive |
|
3 Copyright (C) 2006-2014 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 #include <stdlib.h> |
|
36 |
|
37 #include "zipint.h" |
|
38 |
|
39 |
|
40 ZIP_EXTERN int |
|
41 zip_file_set_comment(zip_t *za, zip_uint64_t idx, |
|
42 const char *comment, zip_uint16_t len, zip_flags_t flags) |
|
43 { |
|
44 zip_entry_t *e; |
|
45 zip_string_t *cstr; |
|
46 int changed; |
|
47 |
|
48 if (_zip_get_dirent(za, idx, 0, NULL) == NULL) |
|
49 return -1; |
|
50 |
|
51 if (ZIP_IS_RDONLY(za)) { |
|
52 zip_error_set(&za->error, ZIP_ER_RDONLY, 0); |
|
53 return -1; |
|
54 } |
|
55 |
|
56 if (len > 0 && comment == NULL) { |
|
57 zip_error_set(&za->error, ZIP_ER_INVAL, 0); |
|
58 return -1; |
|
59 } |
|
60 |
|
61 if (len > 0) { |
|
62 if ((cstr=_zip_string_new((const zip_uint8_t *)comment, len, flags, &za->error)) == NULL) |
|
63 return -1; |
|
64 if ((flags & ZIP_FL_ENCODING_ALL) == ZIP_FL_ENC_GUESS && _zip_guess_encoding(cstr, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_UTF8_GUESSED) |
|
65 cstr->encoding = ZIP_ENCODING_UTF8_KNOWN; |
|
66 } |
|
67 else |
|
68 cstr = NULL; |
|
69 |
|
70 e = za->entry+idx; |
|
71 |
|
72 if (e->changes) { |
|
73 _zip_string_free(e->changes->comment); |
|
74 e->changes->comment = NULL; |
|
75 e->changes->changed &= ~ZIP_DIRENT_COMMENT; |
|
76 } |
|
77 |
|
78 if (e->orig && e->orig->comment) |
|
79 changed = !_zip_string_equal(e->orig->comment, cstr); |
|
80 else |
|
81 changed = (cstr != NULL); |
|
82 |
|
83 if (changed) { |
|
84 if (e->changes == NULL) { |
|
85 if ((e->changes=_zip_dirent_clone(e->orig)) == NULL) { |
|
86 zip_error_set(&za->error, ZIP_ER_MEMORY, 0); |
|
87 _zip_string_free(cstr); |
|
88 return -1; |
|
89 } |
|
90 } |
|
91 e->changes->comment = cstr; |
|
92 e->changes->changed |= ZIP_DIRENT_COMMENT; |
|
93 } |
|
94 else { |
|
95 _zip_string_free(cstr); |
|
96 if (e->changes && e->changes->changed == 0) { |
|
97 _zip_dirent_free(e->changes); |
|
98 e->changes = NULL; |
|
99 } |
|
100 } |
|
101 |
|
102 return 0; |
|
103 } |