1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <sys/debug.h> 28 #include <sys/types.h> 29 #include <sys/zmod.h> 30 31 #ifdef _KERNEL 32 #include <sys/systm.h> 33 #else 34 #include <strings.h> 35 #endif 36 37 size_t 38 gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n) 39 { 40 size_t dstlen = d_len; 41 42 ASSERT(d_len <= s_len); 43 44 if (z_compress_level(d_start, &dstlen, s_start, s_len, n) != Z_OK) { 45 if (d_len != s_len) 46 return (s_len); 47 48 bcopy(s_start, d_start, s_len); 49 return (s_len); 50 } 51 52 return (dstlen); 53 } 54 55 /*ARGSUSED*/ 56 int 57 gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n) 58 { 59 size_t dstlen = d_len; 60 61 ASSERT(d_len >= s_len); 62 63 if (z_uncompress(d_start, &dstlen, s_start, s_len) != Z_OK) 64 return (-1); 65 66 return (0); 67 } 68