1 /* 2 * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <err.h> 32 #include <stdint.h> 33 34 #include <zlib.h> 35 36 #include "mkuzip.h" 37 #include "mkuz_zlib.h" 38 #include "mkuz_blk.h" 39 40 struct mkuz_zlib { 41 uLongf oblen; 42 uint32_t blksz; 43 }; 44 45 void * 46 mkuz_zlib_init(uint32_t blksz) 47 { 48 struct mkuz_zlib *zp; 49 50 if (blksz % DEV_BSIZE != 0) { 51 errx(1, "cluster size should be multiple of %d", 52 DEV_BSIZE); 53 /* Not reached */ 54 } 55 if (compressBound(blksz) > MAXPHYS) { 56 errx(1, "cluster size is too large"); 57 /* Not reached */ 58 } 59 zp = mkuz_safe_zmalloc(sizeof(struct mkuz_zlib)); 60 zp->oblen = compressBound(blksz); 61 zp->blksz = blksz; 62 63 return (void *)zp; 64 } 65 66 struct mkuz_blk * 67 mkuz_zlib_compress(void *p, const struct mkuz_blk *iblk) 68 { 69 uLongf destlen_z; 70 struct mkuz_blk *rval; 71 struct mkuz_zlib *zp; 72 73 zp = (struct mkuz_zlib *)p; 74 75 rval = mkuz_blk_ctor(zp->oblen); 76 77 destlen_z = rval->alen; 78 if (compress2(rval->data, &destlen_z, iblk->data, zp->blksz, 79 Z_BEST_COMPRESSION) != Z_OK) { 80 errx(1, "can't compress data: compress2() " 81 "failed"); 82 /* Not reached */ 83 } 84 85 rval->info.len = (uint32_t)destlen_z; 86 return (rval); 87 } 88