2023-08-24 02:30:24 +00:00
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/*
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zip_source_seek_write.c -- seek to offset for writing
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2024-09-28 00:48:55 +00:00
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Copyright (C) 2014-2022 Dieter Baron and Thomas Klausner
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2023-08-24 02:30:24 +00:00
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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 "zipint.h"
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ZIP_EXTERN int
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zip_source_seek_write(zip_source_t *src, zip_int64_t offset, int whence) {
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zip_source_args_seek_t args;
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if (ZIP_SOURCE_IS_LAYERED(src)) {
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zip_error_set(&src->error, ZIP_ER_OPNOTSUPP, 0);
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return -1;
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}
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if (!ZIP_SOURCE_IS_OPEN_WRITING(src) || (whence != SEEK_SET && whence != SEEK_CUR && whence != SEEK_END)) {
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zip_error_set(&src->error, ZIP_ER_INVAL, 0);
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return -1;
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}
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args.offset = offset;
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args.whence = whence;
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return (_zip_source_call(src, &args, sizeof(args), ZIP_SOURCE_SEEK_WRITE) < 0 ? -1 : 0);
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}
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