106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
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/*
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zip_file_set_comment.c -- set comment for file in archive
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Copyright (C) 2006-2012 Dieter Baron and Thomas Klausner
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This file is part of libzip, a library to manipulate ZIP archives.
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The authors can be contacted at <libzip@nih.at>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. The names of the authors may not be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include "zipint.h"
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ZIP_EXTERN int
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zip_file_set_comment(struct zip *za, zip_uint64_t idx,
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const char *comment, zip_uint16_t len, zip_flags_t flags)
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{
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struct zip_entry *e;
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struct zip_string *cstr;
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int changed;
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if (_zip_get_dirent(za, idx, 0, NULL) == NULL)
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return -1;
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if (ZIP_IS_RDONLY(za)) {
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_zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
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return -1;
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}
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if (len > 0 && comment == NULL) {
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_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
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return -1;
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}
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if (len > 0) {
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if ((cstr=_zip_string_new((const zip_uint8_t *)comment, len, flags, &za->error)) == NULL)
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return -1;
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if ((flags & ZIP_FL_ENCODING_ALL) == ZIP_FL_ENC_GUESS && _zip_guess_encoding(cstr, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_UTF8_GUESSED)
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cstr->encoding = ZIP_ENCODING_UTF8_KNOWN;
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}
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else
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cstr = NULL;
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e = za->entry+idx;
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if (e->changes) {
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_zip_string_free(e->changes->comment);
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e->changes->comment = NULL;
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e->changes->changed &= ~ZIP_DIRENT_COMMENT;
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}
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if (e->orig && e->orig->comment)
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changed = !_zip_string_equal(e->orig->comment, cstr);
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else
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changed = (cstr != NULL);
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if (changed) {
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if (e->changes == NULL) {
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if ((e->changes=_zip_dirent_clone(e->orig)) == NULL) {
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_zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
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_zip_string_free(cstr);
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return -1;
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}
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}
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e->changes->comment = cstr;
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e->changes->changed |= ZIP_DIRENT_COMMENT;
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}
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else {
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_zip_string_free(cstr);
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if (e->changes && e->changes->changed == 0) {
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_zip_dirent_free(e->changes);
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e->changes = NULL;
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}
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}
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return 0;
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}
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