| /* |
| zip_file_set_comment.c -- set comment for file in archive |
| Copyright (C) 2006-2021 Dieter Baron and Thomas Klausner |
| |
| This file is part of libzip, a library to manipulate ZIP archives. |
| The authors can be contacted at <libzip@nih.at> |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in |
| the documentation and/or other materials provided with the |
| distribution. |
| 3. The names of the authors may not be used to endorse or promote |
| products derived from this software without specific prior |
| written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS |
| OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY |
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER |
| IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| |
| #include <stdlib.h> |
| |
| #include "zipint.h" |
| |
| |
| ZIP_EXTERN int |
| zip_file_set_comment(zip_t *za, zip_uint64_t idx, const char *comment, zip_uint16_t len, zip_flags_t flags) { |
| zip_entry_t *e; |
| zip_string_t *cstr; |
| int changed; |
| |
| if (_zip_get_dirent(za, idx, 0, NULL) == NULL) |
| return -1; |
| |
| if (ZIP_IS_RDONLY(za)) { |
| zip_error_set(&za->error, ZIP_ER_RDONLY, 0); |
| return -1; |
| } |
| |
| if (len > 0 && comment == NULL) { |
| zip_error_set(&za->error, ZIP_ER_INVAL, 0); |
| return -1; |
| } |
| |
| if (len > 0) { |
| if ((cstr = _zip_string_new((const zip_uint8_t *)comment, len, flags, &za->error)) == NULL) |
| return -1; |
| if ((flags & ZIP_FL_ENCODING_ALL) == ZIP_FL_ENC_GUESS && _zip_guess_encoding(cstr, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_UTF8_GUESSED) |
| cstr->encoding = ZIP_ENCODING_UTF8_KNOWN; |
| } |
| else |
| cstr = NULL; |
| |
| e = za->entry + idx; |
| |
| if (e->changes) { |
| _zip_string_free(e->changes->comment); |
| e->changes->comment = NULL; |
| e->changes->changed &= ~ZIP_DIRENT_COMMENT; |
| } |
| |
| if (e->orig && e->orig->comment) |
| changed = !_zip_string_equal(e->orig->comment, cstr); |
| else |
| changed = (cstr != NULL); |
| |
| if (changed) { |
| if (e->changes == NULL) { |
| if ((e->changes = _zip_dirent_clone(e->orig)) == NULL) { |
| zip_error_set(&za->error, ZIP_ER_MEMORY, 0); |
| _zip_string_free(cstr); |
| return -1; |
| } |
| } |
| e->changes->comment = cstr; |
| e->changes->changed |= ZIP_DIRENT_COMMENT; |
| } |
| else { |
| _zip_string_free(cstr); |
| if (e->changes && e->changes->changed == 0) { |
| _zip_dirent_free(e->changes); |
| e->changes = NULL; |
| } |
| } |
| |
| return 0; |
| } |