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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/debug.h> 30 #include <sys/types.h> 31 #include <sys/zmod.h> 32 33 #ifdef _KERNEL 34 #include <sys/systm.h> 35 #else 36 #include <strings.h> 37 #endif 38 39 size_t 40 gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n) 41 { 42 size_t dstlen = d_len; 43 44 ASSERT(d_len <= s_len); 45 46 if (z_compress_level(d_start, &dstlen, s_start, s_len, n) != Z_OK) { 47 if (d_len != s_len) 48 return (s_len); 49 50 bcopy(s_start, d_start, s_len); 51 return (s_len); 52 } 53 54 return (dstlen); 55 } 56 57 /*ARGSUSED*/ 58 int 59 gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n) 60 { 61 size_t dstlen = d_len; 62 63 ASSERT(d_len >= s_len); 64 65 if (z_uncompress(d_start, &dstlen, s_start, s_len) != Z_OK) 66 return (-1); 67 68 return (0); 69 } 70