mirror of https://github.com/PCSX2/pcsx2.git
76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
/*
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zip_source_layered.c -- create layered source
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Copyright (C) 2009-2023 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 <info@libzip.org>
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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_source_t *
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zip_source_layered(zip_t *za, zip_source_t *src, zip_source_layered_callback cb, void *ud) {
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if (za == NULL)
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return NULL;
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return zip_source_layered_create(src, cb, ud, &za->error);
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}
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zip_source_t *
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zip_source_layered_create(zip_source_t *src, zip_source_layered_callback cb, void *ud, zip_error_t *error) {
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zip_source_t *zs;
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zip_int64_t lower_supports, supports;
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lower_supports = zip_source_supports(src);
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supports = cb(src, ud, &lower_supports, sizeof(lower_supports), ZIP_SOURCE_SUPPORTS);
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if (supports < 0) {
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zip_error_set(error,ZIP_ER_INVAL, 0); /* Initialize in case cb doesn't return valid error. */
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cb(src, ud, error, sizeof(*error), ZIP_SOURCE_ERROR);
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return NULL;
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}
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if ((zs = _zip_source_new(error)) == NULL) {
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return NULL;
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}
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zs->src = src;
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zs->cb.l = cb;
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zs->ud = ud;
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zs->supports = supports;
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/* Layered sources can't support writing, since we currently have no use case. If we want to revisit this, we have to define how the two sources interact. */
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zs->supports &= ~(ZIP_SOURCE_SUPPORTS_WRITABLE & ~ZIP_SOURCE_SUPPORTS_SEEKABLE);
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return zs;
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}
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