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-rw-r--r--src/Common/libzip/zip_fseek.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_fseek.c b/src/Common/libzip/zip_fseek.c
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+++ b/src/Common/libzip/zip_fseek.c
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+/*
+ zip_fseek.c -- seek in file
+ Copyright (C) 2016-2021 Dieter Baron and Thomas Klausner
+
+ This file is part of libzip, a library to manipulate ZIP archives.
+ The authors can be contacted at <info@libzip.org>
+
+ 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 "zipint.h"
+
+ZIP_EXTERN zip_int8_t
+zip_fseek(zip_file_t *zf, zip_int64_t offset, int whence) {
+ if (!zf)
+ return -1;
+
+ if (zf->error.zip_err != 0)
+ return -1;
+
+ if (zip_source_seek(zf->src, offset, whence) < 0) {
+ _zip_error_set_from_source(&zf->error, zf->src);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+ZIP_EXTERN int
+zip_file_is_seekable(zip_file_t *zfile) {
+ if (!zfile) {
+ return -1;
+ }
+
+ return ZIP_SOURCE_CHECK_SUPPORTED(zip_source_supports(zfile->src), ZIP_SOURCE_SEEK);
+}