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