/* * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/cdefs.h> #include <sys/param.h> #include <err.h> #include <stdint.h> #include <zlib.h> #include "mkuzip.h" #include "mkuz_blk.h" #include "mkuz_zlib.h" struct mkuz_zlib { int comp_level; }; size_t mkuz_zlib_cbound(size_t blksz) { return (compressBound(blksz)); } void * mkuz_zlib_init(int *comp_level) { struct mkuz_zlib *zp; if (*comp_level == USE_DEFAULT_LEVEL) *comp_level = Z_BEST_COMPRESSION; if (*comp_level < Z_BEST_SPEED || *comp_level > Z_BEST_COMPRESSION) errx(1, "provided compression level %d is invalid", *comp_level); /* Not reached */ zp = mkuz_safe_zmalloc(sizeof(struct mkuz_zlib)); zp->comp_level = *comp_level; return (zp); } void mkuz_zlib_compress(void *p, const struct mkuz_blk *iblk, struct mkuz_blk *oblk) { uLongf destlen_z; struct mkuz_zlib *zp; zp = (struct mkuz_zlib *)p; destlen_z = oblk->alen; if (compress2(oblk->data, &destlen_z, iblk->data, iblk->info.len, zp->comp_level) != Z_OK) { errx(1, "can't compress data: compress2() failed"); /* Not reached */ } oblk->info.len = (uint32_t)destlen_z; }