75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
/*
|
||
zip_unchange.c -- undo changes to file in zip archive
|
||
Copyright (C) 1999-2007 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_unchange(struct zip *za, zip_uint64_t idx)
|
||
{
|
||
return _zip_unchange(za, idx, 0);
|
||
}
|
||
|
||
|
||
|
||
int
|
||
_zip_unchange(struct zip *za, zip_uint64_t idx, int allow_duplicates)
|
||
{
|
||
zip_int64_t i;
|
||
|
||
if (idx >= za->nentry) {
|
||
_zip_error_set(&za->error, ZIP_ER_INVAL, 0);
|
||
return -1;
|
||
}
|
||
|
||
if (!allow_duplicates && za->entry[idx].changes && (za->entry[idx].changes->changed & ZIP_DIRENT_FILENAME)) {
|
||
i = _zip_name_locate(za, _zip_get_name(za, idx, ZIP_FL_UNCHANGED, NULL), 0, NULL);
|
||
if (i >= 0 && (zip_uint64_t)i != idx) {
|
||
_zip_error_set(&za->error, ZIP_ER_EXISTS, 0);
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
_zip_dirent_free(za->entry[idx].changes);
|
||
za->entry[idx].changes = NULL;
|
||
|
||
_zip_unchange_data(za->entry+idx);
|
||
|
||
return 0;
|
||
}
|