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83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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/*
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zip_unchange.c -- undo changes to file in zip archive
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Copyright (C) 1999-2007 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_unchange(struct zip *za, int idx)
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{
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return _zip_unchange(za, idx, 0);
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}
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int
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_zip_unchange(struct zip *za, int idx, int allow_duplicates)
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{
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int i;
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if (idx < 0 || idx >= za->nentry) {
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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 (za->entry[idx].ch_filename) {
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if (!allow_duplicates) {
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i = _zip_name_locate(za,
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_zip_get_name(za, idx, ZIP_FL_UNCHANGED, NULL),
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0, NULL);
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if (i != -1 && i != idx) {
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_zip_error_set(&za->error, ZIP_ER_EXISTS, 0);
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return -1;
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}
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}
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free(za->entry[idx].ch_filename);
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za->entry[idx].ch_filename = NULL;
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}
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free(za->entry[idx].ch_comment);
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za->entry[idx].ch_comment = NULL;
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za->entry[idx].ch_comment_len = -1;
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_zip_unchange_data(za->entry+idx);
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return 0;
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}
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