4
|
1 /* |
|
2 zip_set_archive_comment.c -- set archive comment |
|
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_set_archive_comment(zip_t *za, const char *comment, zip_uint16_t len) |
|
42 { |
|
43 zip_string_t *cstr; |
|
44 |
|
45 if (ZIP_IS_RDONLY(za)) { |
|
46 zip_error_set(&za->error, ZIP_ER_RDONLY, 0); |
|
47 return -1; |
|
48 } |
|
49 |
|
50 if (len > 0 && comment == NULL) { |
|
51 zip_error_set(&za->error, ZIP_ER_INVAL, 0); |
|
52 return -1; |
|
53 } |
|
54 |
|
55 if (len > 0) { |
|
56 if ((cstr=_zip_string_new((const zip_uint8_t *)comment, len, ZIP_FL_ENC_GUESS, &za->error)) == NULL) |
|
57 return -1; |
|
58 |
|
59 if (_zip_guess_encoding(cstr, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_CP437) { |
|
60 _zip_string_free(cstr); |
|
61 zip_error_set(&za->error, ZIP_ER_INVAL, 0); |
|
62 return -1; |
|
63 } |
|
64 } |
|
65 else |
|
66 cstr = NULL; |
|
67 |
|
68 _zip_string_free(za->comment_changes); |
|
69 za->comment_changes = NULL; |
|
70 |
|
71 if (((za->comment_orig && _zip_string_equal(za->comment_orig, cstr)) |
|
72 || (za->comment_orig == NULL && cstr == NULL))) { |
|
73 _zip_string_free(cstr); |
|
74 za->comment_changed = 0; |
|
75 } |
|
76 else { |
|
77 za->comment_changes = cstr; |
|
78 za->comment_changed = 1; |
|
79 } |
|
80 |
|
81 return 0; |
|
82 } |