/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ // vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4: /* COPYING CONDITIONS NOTICE: This program is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation, and provided that the following conditions are met: * Redistributions of source code must retain this COPYING CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the PATENT MARKING NOTICE (below), and the PATENT RIGHTS GRANT (below). * Redistributions in binary form must reproduce this COPYING CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the PATENT MARKING NOTICE (below), and the PATENT RIGHTS GRANT (below) in the documentation and/or other materials provided with the distribution. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. COPYRIGHT NOTICE: TokuDB, Tokutek Fractal Tree Indexing Library. Copyright (C) 2007-2013 Tokutek, Inc. DISCLAIMER: This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. UNIVERSITY PATENT NOTICE: The technology is licensed by the Massachusetts Institute of Technology, Rutgers State University of New Jersey, and the Research Foundation of State University of New York at Stony Brook under United States of America Serial No. 11/760379 and to the patents and/or patent applications resulting from it. PATENT MARKING NOTICE: This software is covered by US Patent No. 8,185,551. This software is covered by US Patent No. 8,489,638. PATENT RIGHTS GRANT: "THIS IMPLEMENTATION" means the copyrightable works distributed by Tokutek as part of the Fractal Tree project. "PATENT CLAIMS" means the claims of patents that are owned or licensable by Tokutek, both currently or in the future; and that in the absence of this license would be infringed by THIS IMPLEMENTATION or by using or running THIS IMPLEMENTATION. "PATENT CHALLENGE" shall mean a challenge to the validity, patentability, enforceability and/or non-infringement of any of the PATENT CLAIMS or otherwise opposing any of the PATENT CLAIMS. Tokutek hereby grants to you, for the term and geographical scope of the PATENT CLAIMS, a non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell, import, transfer, and otherwise run, modify, and propagate the contents of THIS IMPLEMENTATION, where such license applies only to the PATENT CLAIMS. This grant does not include claims that would be infringed only as a consequence of further modifications of THIS IMPLEMENTATION. If you or your agent or licensee institute or order or agree to the institution of patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that THIS IMPLEMENTATION constitutes direct or contributory patent infringement, or inducement of patent infringement, then any rights granted to you under this License shall terminate as of the date such litigation is filed. If you or your agent or exclusive licensee institute or order or agree to the institution of a PATENT CHALLENGE, then Tokutek may terminate any rights granted to you under this License. */ #ident "Copyright (c) 2011-2013 Tokutek Inc. All rights reserved." #ident "$Id$" #include #include #include #include "compress.h" #include "memory.h" #include "quicklz.h" #include "toku_assert.h" static inline enum toku_compression_method normalize_compression_method(enum toku_compression_method method) // Effect: resolve "friendly" names like "fast" and "small" into their real values. { switch (method) { case TOKU_DEFAULT_COMPRESSION_METHOD: case TOKU_FAST_COMPRESSION_METHOD: return TOKU_QUICKLZ_METHOD; case TOKU_SMALL_COMPRESSION_METHOD: return TOKU_LZMA_METHOD; default: return method; // everything else is fine } } size_t toku_compress_bound (enum toku_compression_method a, size_t size) // See compress.h for the specification of this function. { a = normalize_compression_method(a); switch (a) { case TOKU_NO_COMPRESSION: return size + 1; case TOKU_LZMA_METHOD: return 1+lzma_stream_buffer_bound(size); // We need one extra for the rfc1950-style header byte (bits -03 are TOKU_LZMA_METHOD (1), bits 4-7 are the compression level) case TOKU_QUICKLZ_METHOD: return size+400 + 1; // quicklz manual says 400 bytes is enough. We need one more byte for the rfc1950-style header byte. bits 0-3 are 9, bits 4-7 are the QLZ_COMPRESSION_LEVEL. case TOKU_ZLIB_METHOD: return compressBound (size); case TOKU_ZLIB_WITHOUT_CHECKSUM_METHOD: return 2+deflateBound(nullptr, size); // We need one extra for the rfc1950-style header byte, and one extra to store windowBits (a bit over cautious about future upgrades maybe). default: break; } // fall through for bad enum (thus compiler can warn us if we didn't use all the enums assert(0); return 0; } void toku_compress (enum toku_compression_method a, // the following types and naming conventions come from zlib.h Bytef *dest, uLongf *destLen, const Bytef *source, uLong sourceLen) // See compress.h for the specification of this function. { static const int zlib_compression_level = 5; static const int zlib_without_checksum_windowbits = -15; a = normalize_compression_method(a); assert(sourceLen < (1LL << 32)); switch (a) { case TOKU_NO_COMPRESSION: dest[0] = TOKU_NO_COMPRESSION; memcpy(dest + 1, source, sourceLen); *destLen = sourceLen + 1; return; case TOKU_ZLIB_METHOD: { int r = compress2(dest, destLen, source, sourceLen, zlib_compression_level); assert(r == Z_OK); assert((dest[0]&0xF) == TOKU_ZLIB_METHOD); return; } case TOKU_QUICKLZ_METHOD: { if (sourceLen==0) { // quicklz requires at least one byte, so we handle this ourselves assert(1 <= *destLen); *destLen = 1; } else { qlz_state_compress *XCALLOC(qsc); size_t actual_destlen = qlz_compress(source, (char*)(dest+1), sourceLen, qsc); assert(actual_destlen +1 <= *destLen); *destLen = actual_destlen+1; // add one for the rfc1950-style header byte. toku_free(qsc); } // Fill in that first byte dest[0] = TOKU_QUICKLZ_METHOD + (QLZ_COMPRESSION_LEVEL << 4); return; } case TOKU_LZMA_METHOD: { const int lzma_compression_level = 2; if (sourceLen==0) { // lzma version 4.999 requires at least one byte, so we'll do it ourselves. assert(1<=*destLen); *destLen = 1; } else { size_t out_pos = 1; lzma_ret r = lzma_easy_buffer_encode(lzma_compression_level, LZMA_CHECK_NONE, NULL, source, sourceLen, dest, &out_pos, *destLen); assert(out_pos < *destLen); if (r != LZMA_OK) { fprintf(stderr, "lzma_easy_buffer_encode() returned %d\n", (int) r); } assert(r==LZMA_OK); *destLen = out_pos; } dest[0] = TOKU_LZMA_METHOD + (lzma_compression_level << 4); return; } case TOKU_ZLIB_WITHOUT_CHECKSUM_METHOD: { z_stream strm; strm.zalloc = Z_NULL; strm.zfree = Z_NULL; strm.opaque = Z_NULL; strm.next_in = const_cast(source); strm.avail_in = sourceLen; int r = deflateInit2(&strm, zlib_compression_level, Z_DEFLATED, zlib_without_checksum_windowbits, 8, Z_DEFAULT_STRATEGY); lazy_assert(r == Z_OK); strm.next_out = dest + 2; strm.avail_out = *destLen - 2; r = deflate(&strm, Z_FINISH); lazy_assert(r == Z_STREAM_END); r = deflateEnd(&strm); lazy_assert(r == Z_OK); *destLen = strm.total_out + 2; dest[0] = TOKU_ZLIB_WITHOUT_CHECKSUM_METHOD + (zlib_compression_level << 4); dest[1] = zlib_without_checksum_windowbits; return; } default: break; } // default fall through to error. assert(0); } void toku_decompress (Bytef *dest, uLongf destLen, const Bytef *source, uLongf sourceLen) // See compress.h for the specification of this function. { assert(sourceLen>=1); // need at least one byte for the RFC header. switch (source[0] & 0xF) { case TOKU_NO_COMPRESSION: memcpy(dest, source + 1, sourceLen - 1); return; case TOKU_ZLIB_METHOD: { uLongf actual_destlen = destLen; int r = uncompress(dest, &actual_destlen, source, sourceLen); assert(r == Z_OK); assert(actual_destlen == destLen); return; } case TOKU_QUICKLZ_METHOD: if (sourceLen>1) { qlz_state_decompress *XCALLOC(qsd); uLongf actual_destlen = qlz_decompress((char*)source+1, dest, qsd); assert(actual_destlen == destLen); toku_free(qsd); } else { // length 1 means there is no data, so do nothing. assert(destLen==0); } return; case TOKU_LZMA_METHOD: { if (sourceLen>1) { uint64_t memlimit = UINT64_MAX; size_t out_pos = 0; size_t in_pos = 1; lzma_ret r = lzma_stream_buffer_decode(&memlimit, // memlimit, use UINT64_MAX to disable this check 0, // flags NULL, // allocator source, &in_pos, sourceLen, dest, &out_pos, destLen); assert(r==LZMA_OK); assert(out_pos == destLen); } else { // length 1 means there is no data, so do nothing. assert(destLen==0); } return; } case TOKU_ZLIB_WITHOUT_CHECKSUM_METHOD: { z_stream strm; strm.next_in = const_cast(source + 2); strm.avail_in = sourceLen - 2; strm.zalloc = Z_NULL; strm.zfree = Z_NULL; strm.opaque = Z_NULL; char windowBits = source[1]; int r = inflateInit2(&strm, windowBits); lazy_assert(r == Z_OK); strm.next_out = dest; strm.avail_out = destLen; r = inflate(&strm, Z_FINISH); lazy_assert(r == Z_STREAM_END); r = inflateEnd(&strm); lazy_assert(r == Z_OK); return; } } // default fall through to error. assert(0); }