2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2022 Klara, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 /* This file is #included by gzip.c */
31 unzstd(int in, int out, char *pre, size_t prelen, off_t *bytes_in)
33 static char *ibuf, *obuf;
43 ibuf = malloc(BUFLEN);
45 obuf = malloc(BUFLEN);
46 if (ibuf == NULL || obuf == NULL)
49 zds = ZSTD_createDStream();
50 ZSTD_initDStream(zds);
62 if (zib.pos >= zib.size) {
63 res = read(in, ibuf, BUFLEN);
75 zres = ZSTD_decompressStream(zds, &zob, &zib);
76 if (ZSTD_isError(zres)) {
77 maybe_errx("%s", ZSTD_getErrorName(zres));
80 res = write(out, obuf, zob.pos);
87 ZSTD_freeDStream(zds);