blob: 166a2c0bce92b7ce6a737f464a15525f8f4268f5 [file] [log] [blame]
Thomas Klausner18a5a682006-04-23 00:40:48 +00001/*
Thomas Klausner18a5a682006-04-23 00:40:48 +00002 zip_set_archive_comment.c -- set archive comment
Thomas Klausnere91cc0f2019-03-12 12:39:36 +01003 Copyright (C) 2006-2018 Dieter Baron and Thomas Klausner
Thomas Klausner18a5a682006-04-23 00:40:48 +00004
5 This file is part of libzip, a library to manipulate ZIP archives.
Dieter Baronb86c4332007-11-07 14:35:13 +01006 The authors can be contacted at <libzip@nih.at>
Thomas Klausner18a5a682006-04-23 00:40:48 +00007
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.
Thomas Klausner8eab1a22018-01-15 14:10:11 +010020
Thomas Klausner18a5a682006-04-23 00:40:48 +000021 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
Thomas Klausner18a5a682006-04-23 00:40:48 +000034
Dieter Baron5e964022006-04-24 10:34:39 +000035#include <stdlib.h>
36
Thomas Klausner18a5a682006-04-23 00:40:48 +000037#include "zipint.h"
38
Thomas Klausner18a5a682006-04-23 00:40:48 +000039
Dieter Baron8bc12762007-08-22 13:39:13 +020040ZIP_EXTERN int
Thomas Klausner8eab1a22018-01-15 14:10:11 +010041zip_set_archive_comment(zip_t *za, const char *comment, zip_uint16_t len) {
Dieter Baron1d9dfeb2014-09-28 23:02:54 +020042 zip_string_t *cstr;
Dieter Baron0e5eeab2012-04-24 18:47:12 +020043
44 if (ZIP_IS_RDONLY(za)) {
Thomas Klausnerea8ba492014-09-23 16:54:47 +020045 zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
Dieter Baron0e5eeab2012-04-24 18:47:12 +020046 return -1;
47 }
Thomas Klausner18a5a682006-04-23 00:40:48 +000048
Dieter Baron837f5ce2013-03-14 12:21:04 +010049 if (len > 0 && comment == NULL) {
Thomas Klausnerea8ba492014-09-23 16:54:47 +020050 zip_error_set(&za->error, ZIP_ER_INVAL, 0);
Thomas Klausner18a5a682006-04-23 00:40:48 +000051 return -1;
52 }
53
Dieter Baron5e964022006-04-24 10:34:39 +000054 if (len > 0) {
Thomas Klausner8eab1a22018-01-15 14:10:11 +010055 if ((cstr = _zip_string_new((const zip_uint8_t *)comment, len, ZIP_FL_ENC_GUESS, &za->error)) == NULL)
Dieter Baron5e964022006-04-24 10:34:39 +000056 return -1;
Dieter Baron0e5eeab2012-04-24 18:47:12 +020057
58 if (_zip_guess_encoding(cstr, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_CP437) {
59 _zip_string_free(cstr);
Thomas Klausnerea8ba492014-09-23 16:54:47 +020060 zip_error_set(&za->error, ZIP_ER_INVAL, 0);
Dieter Baron0e5eeab2012-04-24 18:47:12 +020061 return -1;
62 }
Dieter Baron5e964022006-04-24 10:34:39 +000063 }
64 else
Dieter Baron0e5eeab2012-04-24 18:47:12 +020065 cstr = NULL;
Thomas Klausner18a5a682006-04-23 00:40:48 +000066
Dieter Baron0e5eeab2012-04-24 18:47:12 +020067 _zip_string_free(za->comment_changes);
68 za->comment_changes = NULL;
69
Thomas Klausner8eab1a22018-01-15 14:10:11 +010070 if (((za->comment_orig && _zip_string_equal(za->comment_orig, cstr)) || (za->comment_orig == NULL && cstr == NULL))) {
Dieter Baron0e5eeab2012-04-24 18:47:12 +020071 _zip_string_free(cstr);
72 za->comment_changed = 0;
73 }
74 else {
75 za->comment_changes = cstr;
76 za->comment_changed = 1;
77 }
Thomas Klausner8eab1a22018-01-15 14:10:11 +010078
Thomas Klausner18a5a682006-04-23 00:40:48 +000079 return 0;
80}