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authorSergei Golubchik <serg@mariadb.org>2015-10-26 12:48:26 +0100
committerSergei Golubchik <serg@mariadb.org>2015-10-26 12:57:57 +0100
commit2c8c65297865d9f8da501761f46e2a34e29af603 (patch)
tree3fdf4a00f8537bb3564827884f923ac56966e778 /storage/tokudb/PerconaFT/ft/serialize/quicklz.h
downloadmariadb-git-2c8c65297865d9f8da501761f46e2a34e29af603.tar.gz
5.6.26-74.0
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+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*======
+This file is part of PerconaFT.
+
+
+Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
+
+ PerconaFT is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License, version 2,
+ as published by the Free Software Foundation.
+
+ PerconaFT 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.
+
+ You should have received a copy of the GNU General Public License
+ along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
+
+----------------------------------------
+
+ PerconaFT is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License, version 3,
+ as published by the Free Software Foundation.
+
+ PerconaFT 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
+======= */
+
+#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
+
+#pragma once
+
+// Fast data compression library
+// Copyright (C) 2006-2011 Lasse Mikkel Reinhold
+// lar@quicklz.com
+//
+// QuickLZ can be used for free under the GPL 1, 2 or 3 license (where anything
+// released into public must be open source) or under a commercial license if such
+// has been acquired (see http://www.quicklz.com/order.html). The commercial license
+// does not cover derived or ported versions created by third parties under GPL.
+
+// You can edit following user settings. Data must be decompressed with the same
+// setting of QLZ_COMPRESSION_LEVEL and QLZ_STREAMING_BUFFER as it was compressed
+// (see manual). If QLZ_STREAMING_BUFFER > 0, scratch buffers must be initially
+// zeroed out (see manual). First #ifndef makes it possible to define settings from
+// the outside like the compiler command line.
+
+// 1.5.0 final
+
+#ifndef QLZ_COMPRESSION_LEVEL
+ //#define QLZ_COMPRESSION_LEVEL 1
+ //#define QLZ_COMPRESSION_LEVEL 2
+ #define QLZ_COMPRESSION_LEVEL 3
+
+ #define QLZ_STREAMING_BUFFER 0
+ //#define QLZ_STREAMING_BUFFER 100000
+ //#define QLZ_STREAMING_BUFFER 1000000
+
+ //#define QLZ_MEMORY_SAFE
+#endif
+
+#define QLZ_VERSION_MAJOR 1
+#define QLZ_VERSION_MINOR 5
+#define QLZ_VERSION_REVISION 0
+
+// Using size_t, memset() and memcpy()
+#include <string.h>
+
+// Verify compression level
+#if QLZ_COMPRESSION_LEVEL != 1 && QLZ_COMPRESSION_LEVEL != 2 && QLZ_COMPRESSION_LEVEL != 3
+#error QLZ_COMPRESSION_LEVEL must be 1, 2 or 3
+#endif
+
+typedef unsigned int ui32;
+typedef unsigned short int ui16;
+
+// Decrease QLZ_POINTERS for level 3 to increase compression speed. Do not touch any other values!
+#if QLZ_COMPRESSION_LEVEL == 1
+#define QLZ_POINTERS 1
+#define QLZ_HASH_VALUES 4096
+#elif QLZ_COMPRESSION_LEVEL == 2
+#define QLZ_POINTERS 4
+#define QLZ_HASH_VALUES 2048
+#elif QLZ_COMPRESSION_LEVEL == 3
+#define QLZ_POINTERS 16
+#define QLZ_HASH_VALUES 4096
+#endif
+
+// Detect if pointer size is 64-bit. It's not fatal if some 64-bit target is not detected because this is only for adding an optional 64-bit optimization.
+#if defined _LP64 || defined __LP64__ || defined __64BIT__ || _ADDR64 || defined _WIN64 || defined __arch64__ || __WORDSIZE == 64 || (defined __sparc && defined __sparcv9) || defined __x86_64 || defined __amd64 || defined __x86_64__ || defined _M_X64 || defined _M_IA64 || defined __ia64 || defined __IA64__
+ #define QLZ_PTR_64
+#endif
+
+// hash entry
+typedef struct
+{
+#if QLZ_COMPRESSION_LEVEL == 1
+ ui32 cache;
+#if defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
+ unsigned int offset;
+#else
+ const unsigned char *offset;
+#endif
+#else
+ const unsigned char *offset[QLZ_POINTERS];
+#endif
+
+} qlz_hash_compress;
+
+typedef struct
+{
+#if QLZ_COMPRESSION_LEVEL == 1
+ const unsigned char *offset;
+#else
+ const unsigned char *offset[QLZ_POINTERS];
+#endif
+} qlz_hash_decompress;
+
+
+// states
+typedef struct
+{
+ #if QLZ_STREAMING_BUFFER > 0
+ unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
+ #endif
+ size_t stream_counter;
+ qlz_hash_compress hash[QLZ_HASH_VALUES];
+ unsigned char hash_counter[QLZ_HASH_VALUES];
+} qlz_state_compress;
+
+
+#if QLZ_COMPRESSION_LEVEL == 1 || QLZ_COMPRESSION_LEVEL == 2
+ typedef struct
+ {
+#if QLZ_STREAMING_BUFFER > 0
+ unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
+#endif
+ qlz_hash_decompress hash[QLZ_HASH_VALUES];
+ unsigned char hash_counter[QLZ_HASH_VALUES];
+ size_t stream_counter;
+ } qlz_state_decompress;
+#elif QLZ_COMPRESSION_LEVEL == 3
+ typedef struct
+ {
+#if QLZ_STREAMING_BUFFER > 0
+ unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
+#endif
+#if QLZ_COMPRESSION_LEVEL <= 2
+ qlz_hash_decompress hash[QLZ_HASH_VALUES];
+#endif
+ size_t stream_counter;
+ } qlz_state_decompress;
+#endif
+
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+// Public functions of QuickLZ
+size_t qlz_size_decompressed(const char *source);
+size_t qlz_size_compressed(const char *source);
+size_t qlz_compress(const void *source, char *destination, size_t size, qlz_state_compress *state);
+size_t qlz_decompress(const char *source, void *destination, qlz_state_decompress *state);
+int qlz_get_setting(int setting);
+
+#if defined (__cplusplus)
+}
+#endif