003 File Manager
Current Path:
/usr/src/sys/cddl/contrib/opensolaris/uts/common/zmod
usr
/
src
/
sys
/
cddl
/
contrib
/
opensolaris
/
uts
/
common
/
zmod
/
📁
..
📄
zmod.c
(3.26 KB)
Editing: zmod.c
/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include <sys/types.h> #include <sys/cmn_err.h> #include <sys/systm.h> #include <sys/kmem.h> #include <sys/zmod.h> #include <contrib/zlib/zlib.h> #include <contrib/zlib/zutil.h> /*ARGSUSED*/ static void * zfs_zcalloc(void *opaque, uint_t items, uint_t size) { void *ptr; ptr = malloc((size_t)items * size, M_SOLARIS, M_NOWAIT); return ptr; } /*ARGSUSED*/ static void zfs_zcfree(void *opaque, void *ptr) { free(ptr, M_SOLARIS); } /* * Uncompress the buffer 'src' into the buffer 'dst'. The caller must store * the expected decompressed data size externally so it can be passed in. * The resulting decompressed size is then returned through dstlen. This * function return Z_OK on success, or another error code on failure. */ int z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen) { z_stream zs; int err; bzero(&zs, sizeof (zs)); zs.next_in = (uchar_t *)src; zs.avail_in = srclen; zs.next_out = dst; zs.avail_out = *dstlen; zs.zalloc = zfs_zcalloc; zs.zfree = zfs_zcfree; /* * Call inflateInit2() specifying a window size of DEF_WBITS * with the 6th bit set to indicate that the compression format * type (zlib or gzip) should be automatically detected. */ if ((err = inflateInit2(&zs, DEF_WBITS | 0x20)) != Z_OK) return (err); if ((err = inflate(&zs, Z_FINISH)) != Z_STREAM_END) { (void) inflateEnd(&zs); return (err == Z_OK ? Z_BUF_ERROR : err); } *dstlen = zs.total_out; return (inflateEnd(&zs)); } int z_compress_level(void *dst, size_t *dstlen, const void *src, size_t srclen, int level) { z_stream zs; int err; bzero(&zs, sizeof (zs)); zs.next_in = (uchar_t *)src; zs.avail_in = srclen; zs.next_out = dst; zs.avail_out = *dstlen; zs.zalloc = zfs_zcalloc; zs.zfree = zfs_zcfree; if ((err = deflateInit(&zs, level)) != Z_OK) return (err); if ((err = deflate(&zs, Z_FINISH)) != Z_STREAM_END) { (void) deflateEnd(&zs); return (err == Z_OK ? Z_BUF_ERROR : err); } *dstlen = zs.total_out; return (deflateEnd(&zs)); } int z_compress(void *dst, size_t *dstlen, const void *src, size_t srclen) { return (z_compress_level(dst, dstlen, src, srclen, Z_DEFAULT_COMPRESSION)); } /* * Convert a zlib error code into a string error message. */ const char * z_strerror(int err) { int i = Z_NEED_DICT - err; if (i < 0 || i > Z_NEED_DICT - Z_VERSION_ERROR) return ("unknown error"); return (zError(err)); }
Upload File
Create Folder