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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 #include <sys/modctl.h> 31 #include <sys/zmod.h> 32 #include <sys/systm.h> 33 34 #include "zlib.h" 35 36 /* 37 * Uncompress the buffer 'src' into the buffer 'dst'. The caller must store 38 * the expected decompressed data size externally so it can be passed in. 39 * The resulting decompressed size is then returned through dstlen. This 40 * function return Z_OK on success, or another error code on failure. 41 */ 42 int 43 z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen) 44 { 45 z_stream zs; 46 int err; 47 48 bzero(&zs, sizeof (zs)); 49 zs.next_in = (uchar_t *)src; 50 zs.avail_in = srclen; 51 zs.next_out = dst; 52 zs.avail_out = *dstlen; 53 54 if ((err = inflateInit(&zs)) != Z_OK) 55 return (err); 56 57 if ((err = inflate(&zs, Z_FINISH)) != Z_STREAM_END) { 58 (void) inflateEnd(&zs); 59 return (err == Z_OK ? Z_BUF_ERROR : err); 60 } 61 62 *dstlen = zs.total_out; 63 return (inflateEnd(&zs)); 64 } 65 66 static const char *const z_errmsg[] = { 67 "need dictionary", /* Z_NEED_DICT 2 */ 68 "stream end", /* Z_STREAM_END 1 */ 69 "", /* Z_OK 0 */ 70 "file error", /* Z_ERRNO (-1) */ 71 "stream error", /* Z_STREAM_ERROR (-2) */ 72 "data error", /* Z_DATA_ERROR (-3) */ 73 "insufficient memory", /* Z_MEM_ERROR (-4) */ 74 "buffer error", /* Z_BUF_ERROR (-5) */ 75 "incompatible version" /* Z_VERSION_ERROR (-6) */ 76 }; 77 78 /* 79 * Convert a zlib error code into a string error message. 80 */ 81 const char * 82 z_strerror(int err) 83 { 84 int i = Z_NEED_DICT - err; 85 86 if (i < 0 || i >= sizeof (z_errmsg) / sizeof (z_errmsg[0])) 87 return ("unknown error"); 88 89 return (z_errmsg[i]); 90 } 91 92 static struct modlmisc modlmisc = { 93 &mod_miscops, "RFC 1950 decompression routines" 94 }; 95 96 static struct modlinkage modlinkage = { 97 MODREV_1, &modlmisc, NULL 98 }; 99 100 int 101 _init(void) 102 { 103 return (mod_install(&modlinkage)); 104 } 105 106 int 107 _info(struct modinfo *mip) 108 { 109 return (mod_info(&modlinkage, mip)); 110 } 111 112 int 113 _fini(void) 114 { 115 return (mod_remove(&modlinkage)); 116 } 117