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/*-
* Copyright (c) 2004 Max Khon
* Copyright (c) 2014 Juniper Networks, Inc.
* Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org>
* 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>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/zlib.h>
#include <geom/uzip/g_uzip.h>
#include <geom/uzip/g_uzip_dapi.h>
#include <geom/uzip/g_uzip_zlib.h>
struct g_uzip_zlib {
uint32_t blksz;
struct g_uzip_dapi pub;
/* Zlib decoder structs */
z_stream zs;
};
static void *z_alloc(void *, u_int, u_int);
static void z_free(void *, void *);
static int g_uzip_zlib_rewind(struct g_uzip_dapi *, const char *);
static void
g_uzip_zlib_free(struct g_uzip_dapi *zpp)
{
struct g_uzip_zlib *zp;
zp = (struct g_uzip_zlib *)zpp->pvt;
inflateEnd(&zp->zs);
free(zp, M_GEOM_UZIP);
}
static int
g_uzip_zlib_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *ibp,
size_t ilen, void *obp)
{
int err;
struct g_uzip_zlib *zp;
zp = (struct g_uzip_zlib *)zpp->pvt;
zp->zs.next_in = ibp;
zp->zs.avail_in = ilen;
zp->zs.next_out = obp;
zp->zs.avail_out = zp->blksz;
err = (inflate(&zp->zs, Z_FINISH) != Z_STREAM_END) ? 1 : 0;
if (err != 0) {
printf("%s: UZIP(zlib) inflate() failed\n", gp_name);
}
return (err);
}
static int
g_uzip_zlib_rewind(struct g_uzip_dapi *zpp, const char *gp_name)
{
int err;
struct g_uzip_zlib *zp;
zp = (struct g_uzip_zlib *)zpp->pvt;
err = 0;
if (inflateReset(&zp->zs) != Z_OK) {
printf("%s: UZIP(zlib) decoder reset failed\n", gp_name);
err = 1;
}
return (err);
}
static int
z_compressBound(int len)
{
return (len + (len >> 12) + (len >> 14) + 11);
}
struct g_uzip_dapi *
g_uzip_zlib_ctor(uint32_t blksz)
{
struct g_uzip_zlib *zp;
zp = malloc(sizeof(struct g_uzip_zlib), M_GEOM_UZIP, M_WAITOK);
zp->zs.zalloc = z_alloc;
zp->zs.zfree = z_free;
if (inflateInit(&zp->zs) != Z_OK) {
goto e1;
}
zp->blksz = blksz;
zp->pub.max_blen = z_compressBound(blksz);
zp->pub.decompress = &g_uzip_zlib_decompress;
zp->pub.free = &g_uzip_zlib_free;
zp->pub.rewind = &g_uzip_zlib_rewind;
zp->pub.pvt = (void *)zp;
return (&zp->pub);
e1:
free(zp, M_GEOM_UZIP);
return (NULL);
}
static void *
z_alloc(void *nil, u_int type, u_int size)
{
void *ptr;
ptr = malloc(type * size, M_GEOM_UZIP, M_NOWAIT);
return (ptr);
}
static void
z_free(void *nil, void *ptr)
{
free(ptr, M_GEOM_UZIP);
}
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