1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #include <err.h> 30 #include <limits.h> 31 #include <stddef.h> 32 #include <stdint.h> 33 34 #include <zstd.h> 35 36 #include "mkuzip.h" 37 #include "mkuz_blk.h" 38 #include "mkuz_zstd.h" 39 40 size_t 41 mkuz_zstd_cbound(size_t blksz) 42 { 43 return (ZSTD_compressBound(blksz)); 44 } 45 46 void * 47 mkuz_zstd_init(int *comp_level) 48 { 49 ZSTD_CCtx *cctx; 50 size_t rc; 51 52 /* Default chosen for near-parity with mkuzip zlib default. */ 53 if (*comp_level == USE_DEFAULT_LEVEL) 54 *comp_level = 9; 55 if (*comp_level < ZSTD_minCLevel() || *comp_level == 0 || 56 *comp_level > ZSTD_maxCLevel()) 57 errx(1, "provided compression level %d is invalid", 58 *comp_level); 59 60 cctx = ZSTD_createCCtx(); 61 if (cctx == NULL) 62 errx(1, "could not allocate Zstd context"); 63 64 rc = ZSTD_CCtx_setParameter(cctx, ZSTD_c_compressionLevel, 65 *comp_level); 66 if (ZSTD_isError(rc)) 67 errx(1, "Could not set zstd compression level %d: %s", 68 *comp_level, ZSTD_getErrorName(rc)); 69 70 rc = ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1); 71 if (ZSTD_isError(rc)) 72 errx(1, "Could not enable zstd checksum: %s", 73 ZSTD_getErrorName(rc)); 74 75 return (cctx); 76 } 77 78 void 79 mkuz_zstd_compress(void *p, const struct mkuz_blk *iblk, struct mkuz_blk *oblk) 80 { 81 ZSTD_CCtx *cctx; 82 size_t rc; 83 84 cctx = p; 85 86 rc = ZSTD_compress2(cctx, oblk->data, oblk->alen, iblk->data, 87 iblk->info.len); 88 if (ZSTD_isError(rc)) 89 errx(1, "could not compress data: ZSTD_compress2: %s", 90 ZSTD_getErrorName(rc)); 91 92 oblk->info.len = rc; 93 } 94