126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*-
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* Copyright (c) 2004 Max Khon
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* Copyright (c) 2014 Juniper Networks, Inc.
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* Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org>
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* Copyright (c) 2010-2012 Aleksandr Rybalko
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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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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <contrib/xz-embedded/linux/include/linux/xz.h>
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#include <geom/uzip/g_uzip.h>
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#include <geom/uzip/g_uzip_dapi.h>
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#include <geom/uzip/g_uzip_lzma.h>
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struct g_uzip_lzma {
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struct g_uzip_dapi pub;
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uint32_t blksz;
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/* XZ decoder structs */
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struct xz_buf b;
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struct xz_dec *s;
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};
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static int g_uzip_lzma_nop(struct g_uzip_dapi *, const char *);
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static void
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g_uzip_lzma_free(struct g_uzip_dapi *lzpp)
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{
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struct g_uzip_lzma *lzp;
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lzp = (struct g_uzip_lzma *)lzpp->pvt;
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if (lzp->s != NULL) {
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xz_dec_end(lzp->s);
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lzp->s = NULL;
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}
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free(lzp, M_GEOM_UZIP);
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}
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static int
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g_uzip_lzma_decompress(struct g_uzip_dapi *lzpp, const char *gp_name,
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void *ibp, size_t ilen, void *obp)
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{
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struct g_uzip_lzma *lzp;
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int err;
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lzp = (struct g_uzip_lzma *)lzpp->pvt;
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lzp->b.in = ibp;
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lzp->b.out = obp;
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lzp->b.in_pos = lzp->b.out_pos = 0;
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lzp->b.in_size = ilen;
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lzp->b.out_size = lzp->blksz;
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err = (xz_dec_run(lzp->s, &lzp->b) != XZ_STREAM_END) ? 1 : 0;
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/* TODO decoder recovery, if needed */
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if (err != 0) {
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printf("%s: ibp=%p, obp=%p, in_pos=%jd, out_pos=%jd, "
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"in_size=%jd, out_size=%jd\n", __func__, ibp, obp,
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(intmax_t)lzp->b.in_pos, (intmax_t)lzp->b.out_pos,
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(intmax_t)lzp->b.in_size, (intmax_t)lzp->b.out_size);
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}
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return (err);
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}
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static int
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LZ4_compressBound(int isize)
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{
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return (isize + (isize / 255) + 16);
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}
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struct g_uzip_dapi *
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g_uzip_lzma_ctor(uint32_t blksz)
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{
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struct g_uzip_lzma *lzp;
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lzp = malloc(sizeof(struct g_uzip_lzma), M_GEOM_UZIP, M_WAITOK);
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lzp->s = xz_dec_init(XZ_SINGLE, 0);
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if (lzp->s == NULL) {
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goto e1;
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}
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lzp->blksz = blksz;
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lzp->pub.max_blen = LZ4_compressBound(blksz);
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lzp->pub.decompress = &g_uzip_lzma_decompress;
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lzp->pub.free = &g_uzip_lzma_free;
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lzp->pub.rewind = &g_uzip_lzma_nop;
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lzp->pub.pvt = lzp;
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return (&lzp->pub);
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e1:
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free(lzp, M_GEOM_UZIP);
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return (NULL);
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}
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static int
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g_uzip_lzma_nop(struct g_uzip_dapi *zpp, const char *gp_name)
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{
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return (0);
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}
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