Thomas Klausner | d100986 | 2019-09-17 12:38:43 +0200 | [diff] [blame] | 1 | /* |
| 2 | zip_source_accept_empty.c -- if empty source is a valid archive |
Thomas Klausner | 9c5347e | 2021-06-18 11:33:22 +0200 | [diff] [blame] | 3 | Copyright (C) 2019-2021 Dieter Baron and Thomas Klausner |
Thomas Klausner | d100986 | 2019-09-17 12:38:43 +0200 | [diff] [blame] | 4 | |
| 5 | This file is part of libzip, a library to manipulate ZIP archives. |
| 6 | The authors can be contacted at <libzip@nih.at> |
| 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 "zipint.h" |
| 36 | |
| 37 | |
| 38 | bool |
| 39 | zip_source_accept_empty(zip_source_t *src) { |
| 40 | int ret; |
| 41 | |
| 42 | if ((zip_source_supports(src) & ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_ACCEPT_EMPTY)) == 0) { |
Thomas Klausner | a14fded | 2020-07-21 16:07:23 +0200 | [diff] [blame] | 43 | if (ZIP_SOURCE_IS_LAYERED(src)) { |
| 44 | return zip_source_accept_empty(src->src); |
| 45 | } |
| 46 | return true; |
Thomas Klausner | d100986 | 2019-09-17 12:38:43 +0200 | [diff] [blame] | 47 | } |
| 48 | |
Thomas Klausner | 3de9b42 | 2019-09-17 16:50:47 +0200 | [diff] [blame] | 49 | ret = (int)_zip_source_call(src, NULL, 0, ZIP_SOURCE_ACCEPT_EMPTY); |
Thomas Klausner | d100986 | 2019-09-17 12:38:43 +0200 | [diff] [blame] | 50 | |
| 51 | return ret != 0; |
| 52 | } |