82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
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/*
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* Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
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* All rights reserved.
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*
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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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <err.h>
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#include <stdint.h>
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#include <zlib.h>
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#include "mkuzip.h"
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#include "mkuz_zlib.h"
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struct mkuz_zlib {
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char *obuf;
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uLongf oblen;
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uint32_t blksz;
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};
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static struct mkuz_zlib uzip;
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void *
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mkuz_zlib_init(uint32_t blksz)
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{
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if (blksz % DEV_BSIZE != 0) {
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errx(1, "cluster size should be multiple of %d",
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DEV_BSIZE);
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/* Not reached */
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}
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if (compressBound(blksz) > MAXPHYS) {
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errx(1, "cluster size is too large");
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/* Not reached */
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}
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uzip.oblen = compressBound(blksz);
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uzip.obuf = mkuz_safe_malloc(uzip.oblen);
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uzip.blksz = blksz;
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return (uzip.obuf);
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}
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void
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mkuz_zlib_compress(const char *ibuf, uint32_t *destlen)
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{
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uLongf destlen_z;
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destlen_z = uzip.oblen;
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if (compress2(uzip.obuf, &destlen_z, ibuf, uzip.blksz,
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Z_BEST_COMPRESSION) != Z_OK) {
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errx(1, "can't compress data: compress2() "
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"failed");
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/* Not reached */
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}
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*destlen = (uint32_t)destlen_z;
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}
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