Mercurial > embed
comparison libzip/lib/zip_file_set_comment.c @ 4:2306f4b04790
libzip: import 1.1.2
author | David Demelier <markand@malikania.fr> |
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date | Wed, 24 Feb 2016 21:19:28 +0100 |
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3:543b0653ea27 | 4:2306f4b04790 |
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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 } |