Rizin
unix-like reverse engineering framework and cli tools
zip_set_archive_comment.c
Go to the documentation of this file.
1 /*
2  zip_set_archive_comment.c -- set archive comment
3  Copyright (C) 2006-2021 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 ZIP_EXTERN int
41 zip_set_archive_comment(zip_t *za, const char *comment, zip_uint16_t len) {
42  zip_string_t *cstr;
43 
44  if (ZIP_IS_RDONLY(za)) {
46  return -1;
47  }
48 
49  if (len > 0 && comment == NULL) {
51  return -1;
52  }
53 
54  if (len > 0) {
55  if ((cstr = _zip_string_new((const zip_uint8_t *)comment, len, ZIP_FL_ENC_GUESS, &za->error)) == NULL)
56  return -1;
57 
59  _zip_string_free(cstr);
61  return -1;
62  }
63  }
64  else
65  cstr = NULL;
66 
69 
70  if (((za->comment_orig && _zip_string_equal(za->comment_orig, cstr)) || (za->comment_orig == NULL && cstr == NULL))) {
71  _zip_string_free(cstr);
72  za->comment_changed = 0;
73  }
74  else {
75  za->comment_changes = cstr;
76  za->comment_changed = 1;
77  }
78 
79  return 0;
80 }
size_t len
Definition: 6502dis.c:15
#define NULL
Definition: cris-opc.c:27
ZIP_EXTERN void zip_error_set(zip_error_t *_Nullable, int, int)
Definition: zip_error.c:126
#define ZIP_EXTERN
Definition: zip.h:54
#define ZIP_FL_ENC_GUESS
Definition: zip.h:82
#define ZIP_ER_RDONLY
Definition: zip.h:130
#define ZIP_ER_INVAL
Definition: zip.h:123
Definition: zipint.h:278
zip_error_t error
Definition: zipint.h:281
zip_string_t * comment_changes
Definition: zipint.h:289
zip_string_t * comment_orig
Definition: zipint.h:288
bool comment_changed
Definition: zipint.h:290
ZIP_EXTERN int zip_set_archive_comment(zip_t *za, const char *comment, zip_uint16_t len)
zip_string_t * _zip_string_new(const zip_uint8_t *raw, zip_uint16_t length, zip_flags_t flags, zip_error_t *error)
Definition: zip_string.c:121
void _zip_string_free(zip_string_t *s)
Definition: zip_string.c:69
int _zip_string_equal(const zip_string_t *a, const zip_string_t *b)
Definition: zip_string.c:55
zip_encoding_type_t _zip_guess_encoding(zip_string_t *str, zip_encoding_type_t expected_encoding)
Definition: zip_utf-8.c:100
uint8_t zip_uint8_t
Definition: zipconf.h:33
uint16_t zip_uint16_t
Definition: zipconf.h:35
#define ZIP_IS_RDONLY(za)
Definition: zipint.h:479
@ ZIP_ENCODING_UNKNOWN
Definition: zipint.h:254
@ ZIP_ENCODING_CP437
Definition: zipint.h:258
zip_t * za
Definition: ziptool.c:79