| /* |
| zip_source_layered.c -- create layered source |
| Copyright (C) 2009-2021 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_source_t * |
| zip_source_layered(zip_t *za, zip_source_t *src, zip_source_layered_callback cb, void *ud) { |
| if (za == NULL) |
| return NULL; |
| |
| return zip_source_layered_create(src, cb, ud, &za->error); |
| } |
| |
| |
| zip_source_t * |
| zip_source_layered_create(zip_source_t *src, zip_source_layered_callback cb, void *ud, zip_error_t *error) { |
| zip_source_t *zs; |
| |
| if ((zs = _zip_source_new(error)) == NULL) |
| return NULL; |
| |
| zip_source_keep(src); |
| zs->src = src; |
| zs->cb.l = cb; |
| zs->ud = ud; |
| |
| zs->supports = cb(src, ud, NULL, 0, ZIP_SOURCE_SUPPORTS); |
| if (zs->supports < 0) { |
| zs->supports = ZIP_SOURCE_SUPPORTS_READABLE; |
| } |
| |
| return zs; |
| } |