^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * LZ4 - Fast LZ compression algorithm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2011 - 2016, Yann Collet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * BSD 2 - Clause License (http://www.opensource.org/licenses/bsd - license.php)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * modification, are permitted provided that the following conditions are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * * Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * * Redistributions in binary form must reproduce the above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * copyright notice, this list of conditions and the following disclaimer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * in the documentation and/or other materials provided with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * You can contact the author at :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * - LZ4 homepage : http://www.lz4.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * - LZ4 source repository : https://github.com/lz4/lz4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * Changed for kernel usage by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Sven Schmidt <4sschmid@informatik.uni-hamburg.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*-************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Dependencies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) **************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/lz4.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include "lz4defs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*-*****************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Decompression functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *******************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define DEBUGLOG(l, ...) {} /* disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #ifndef assert
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define assert(condition) ((void)0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * LZ4_decompress_generic() :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * This generic decompression function covers all use cases.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * It shall be instantiated several times, using different sets of directives.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * Note that it is important for performance that this function really get inlined,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * in order to remove useless branches during compilation optimization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static FORCE_INLINE int LZ4_decompress_generic(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) const char * const src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) char * const dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int srcSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * If endOnInput == endOnInputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * this value is `dstCapacity`
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int outputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* endOnOutputSize, endOnInputSize */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) endCondition_directive endOnInput,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* full, partial */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) earlyEnd_directive partialDecoding,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* noDict, withPrefix64k, usingExtDict */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) dict_directive dict,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* always <= dst, == dst when no prefix */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) const BYTE * const lowPrefix,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* only if dict == usingExtDict */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) const BYTE * const dictStart,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* note : = 0 if noDict */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) const size_t dictSize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) const BYTE *ip = (const BYTE *) src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) const BYTE * const iend = ip + srcSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) BYTE *op = (BYTE *) dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) BYTE * const oend = op + outputSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) BYTE *cpy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) const BYTE * const dictEnd = (const BYTE *)dictStart + dictSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static const unsigned int inc32table[8] = {0, 1, 2, 1, 0, 4, 4, 4};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static const int dec64table[8] = {0, 0, 0, -1, -4, 1, 2, 3};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) const int safeDecode = (endOnInput == endOnInputSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) const int checkOffset = ((safeDecode) && (dictSize < (int)(64 * KB)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* Set up the "end" pointers for the shortcut. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) const BYTE *const shortiend = iend -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) (endOnInput ? 14 : 8) /*maxLL*/ - 2 /*offset*/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) const BYTE *const shortoend = oend -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) (endOnInput ? 14 : 8) /*maxLL*/ - 18 /*maxML*/;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) DEBUGLOG(5, "%s (srcSize:%i, dstSize:%i)", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) srcSize, outputSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Special cases */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) assert(lowPrefix <= op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) assert(src != NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* Empty output buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if ((endOnInput) && (unlikely(outputSize == 0)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return ((srcSize == 1) && (*ip == 0)) ? 0 : -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if ((!endOnInput) && (unlikely(outputSize == 0)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return (*ip == 0 ? 1 : -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if ((endOnInput) && unlikely(srcSize == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* Main Loop : decode sequences */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) size_t length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) const BYTE *match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) size_t offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /* get literal length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) unsigned int const token = *ip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) length = token>>ML_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* ip < iend before the increment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) assert(!endOnInput || ip <= iend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * A two-stage shortcut for the most common case:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * 1) If the literal length is 0..14, and there is enough
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * space, enter the shortcut and copy 16 bytes on behalf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * of the literals (in the fast mode, only 8 bytes can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) * safely copied this way).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * 2) Further if the match length is 4..18, copy 18 bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * in a similar manner; but we ensure that there's enough
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * space in the output for those 18 bytes earlier, upon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * entering the shortcut (in other words, there is a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * combined check for both stages).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * The & in the likely() below is intentionally not && so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * some compilers can produce better parallelized runtime code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if ((endOnInput ? length != RUN_MASK : length <= 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * strictly "less than" on input, to re-enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * the loop with at least one byte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) && likely((endOnInput ? ip < shortiend : 1) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) (op <= shortoend))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Copy the literals */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) LZ4_memcpy(op, ip, endOnInput ? 16 : 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) op += length; ip += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * The second stage:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * prepare for match copying, decode full info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * If it doesn't work out, the info won't be wasted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) length = token & ML_MASK; /* match length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) offset = LZ4_readLE16(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) ip += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) match = op - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) assert(match <= op); /* check overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* Do not deal with overlapping matches. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if ((length != ML_MASK) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) (offset >= 8) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) (dict == withPrefix64k || match >= lowPrefix)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Copy the match. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) LZ4_memcpy(op + 0, match + 0, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) LZ4_memcpy(op + 8, match + 8, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) LZ4_memcpy(op + 16, match + 16, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) op += length + MINMATCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) /* Both stages worked, load the next token. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * The second stage didn't work out, but the info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * is ready. Propel it right to the point of match
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * copying.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto _copy_match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /* decode literal length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (length == RUN_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) unsigned int s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (unlikely(endOnInput ? ip >= iend - RUN_MASK : 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /* overflow detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) s = *ip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) length += s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) } while (likely(endOnInput
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ? ip < iend - RUN_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) : 1) & (s == 255));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if ((safeDecode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) && unlikely((uptrval)(op) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) length < (uptrval)(op))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) /* overflow detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if ((safeDecode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) && unlikely((uptrval)(ip) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) length < (uptrval)(ip))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* overflow detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /* copy literals */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) cpy = op + length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (((endOnInput) && ((cpy > oend - MFLIMIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) || (ip + length > iend - (2 + 1 + LASTLITERALS))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) || ((!endOnInput) && (cpy > oend - WILDCOPYLENGTH))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (partialDecoding) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (cpy > oend) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * Partial decoding :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * stop in the middle of literal segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) cpy = oend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) length = oend - op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if ((endOnInput)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) && (ip + length > iend)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * Error :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * read attempt beyond
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * end of input buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if ((!endOnInput)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) && (cpy != oend)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * Error :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * block decoding must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * stop exactly there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if ((endOnInput)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) && ((ip + length != iend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) || (cpy > oend))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * Error :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * input must be consumed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * supports overlapping memory regions; only matters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * for in-place decompression scenarios
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) LZ4_memmove(op, ip, length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) ip += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) op += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* Necessarily EOF, due to parsing restrictions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (!partialDecoding || (cpy == oend))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* may overwrite up to WILDCOPYLENGTH beyond cpy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) LZ4_wildCopy(op, ip, cpy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) ip += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) op = cpy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) /* get offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) offset = LZ4_readLE16(ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) ip += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) match = op - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /* get matchlength */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) length = token & ML_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) _copy_match:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if ((checkOffset) && (unlikely(match + dictSize < lowPrefix))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /* Error : offset outside buffers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) /* costs ~1%; silence an msan warning when offset == 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * note : when partialDecoding, there is no guarantee that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * at least 4 bytes remain available in output buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (!partialDecoding) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) assert(oend > op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) assert(oend - op >= 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) LZ4_write32(op, (U32)offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (length == ML_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) unsigned int s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) s = *ip++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if ((endOnInput) && (ip > iend - LASTLITERALS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) length += s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) } while (s == 255);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if ((safeDecode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) && unlikely(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) (uptrval)(op) + length < (uptrval)op)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* overflow detection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) length += MINMATCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) /* match starting within external dictionary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if ((dict == usingExtDict) && (match < lowPrefix)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (unlikely(op + length > oend - LASTLITERALS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) /* doesn't respect parsing restriction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (!partialDecoding)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) length = min(length, (size_t)(oend - op));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (length <= (size_t)(lowPrefix - match)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) * match fits entirely within external
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) * dictionary : just copy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) memmove(op, dictEnd - (lowPrefix - match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) op += length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * match stretches into both external
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * dictionary and current block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) size_t const copySize = (size_t)(lowPrefix - match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) size_t const restSize = length - copySize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) LZ4_memcpy(op, dictEnd - copySize, copySize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) op += copySize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (restSize > (size_t)(op - lowPrefix)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) /* overlap copy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) BYTE * const endOfMatch = op + restSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) const BYTE *copyFrom = lowPrefix;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) while (op < endOfMatch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) *op++ = *copyFrom++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) LZ4_memcpy(op, lowPrefix, restSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) op += restSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) /* copy match within block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) cpy = op + length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * partialDecoding :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * may not respect endBlock parsing restrictions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) assert(op <= oend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (partialDecoding &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) (cpy > oend - MATCH_SAFEGUARD_DISTANCE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) size_t const mlen = min(length, (size_t)(oend - op));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) const BYTE * const matchEnd = match + mlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) BYTE * const copyEnd = op + mlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (matchEnd > op) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) /* overlap copy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) while (op < copyEnd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) *op++ = *match++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) LZ4_memcpy(op, match, mlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) op = copyEnd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (op == oend)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (unlikely(offset < 8)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) op[0] = match[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) op[1] = match[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) op[2] = match[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) op[3] = match[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) match += inc32table[offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) LZ4_memcpy(op + 4, match, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) match -= dec64table[offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) LZ4_copy8(op, match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) match += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) op += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (unlikely(cpy > oend - MATCH_SAFEGUARD_DISTANCE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) BYTE * const oCopyLimit = oend - (WILDCOPYLENGTH - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) if (cpy > oend - LASTLITERALS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * Error : last LASTLITERALS bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * must be literals (uncompressed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) goto _output_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (op < oCopyLimit) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) LZ4_wildCopy(op, match, oCopyLimit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) match += oCopyLimit - op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) op = oCopyLimit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) while (op < cpy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) *op++ = *match++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) LZ4_copy8(op, match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (length > 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) LZ4_wildCopy(op + 8, match + 8, cpy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) op = cpy; /* wildcopy correction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) /* end of decoding */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) if (endOnInput) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* Nb of output bytes decoded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) return (int) (((char *)op) - dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /* Nb of input bytes read */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return (int) (((const char *)ip) - src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) /* Overflow error detected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) _output_error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return (int) (-(((const char *)ip) - src)) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) int LZ4_decompress_safe(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) int compressedSize, int maxDecompressedSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) compressedSize, maxDecompressedSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) endOnInputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) noDict, (BYTE *)dest, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) int LZ4_decompress_safe_partial(const char *src, char *dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) int compressedSize, int targetOutputSize, int dstCapacity)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) dstCapacity = min(targetOutputSize, dstCapacity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return LZ4_decompress_generic(src, dst, compressedSize, dstCapacity,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) endOnInputSize, partial_decode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) noDict, (BYTE *)dst, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return LZ4_decompress_generic(source, dest, 0, originalSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) endOnOutputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) withPrefix64k,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) (BYTE *)dest - 64 * KB, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /* ===== Instantiate a few more decoding cases, used more than once. ===== */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) int compressedSize, int maxOutputSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) endOnInputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) withPrefix64k,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) (BYTE *)dest - 64 * KB, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static int LZ4_decompress_safe_withSmallPrefix(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) int compressedSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) int maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) size_t prefixSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) endOnInputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) noDict,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) (BYTE *)dest - prefixSize, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) int compressedSize, int maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) const void *dictStart, size_t dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) endOnInputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) usingExtDict, (BYTE *)dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) (const BYTE *)dictStart, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) static int LZ4_decompress_fast_extDict(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) int originalSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) const void *dictStart, size_t dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) 0, originalSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) endOnOutputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) usingExtDict, (BYTE *)dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) (const BYTE *)dictStart, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) * The "double dictionary" mode, for use with e.g. ring buffers: the first part
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) * of the dictionary is passed as prefix, and the second via dictStart + dictSize.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) * These routines are used only once, in LZ4_decompress_*_continue().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) static FORCE_INLINE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) int LZ4_decompress_safe_doubleDict(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) int compressedSize, int maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) size_t prefixSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) const void *dictStart, size_t dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) endOnInputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) usingExtDict, (BYTE *)dest - prefixSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) (const BYTE *)dictStart, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static FORCE_INLINE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) int LZ4_decompress_fast_doubleDict(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) int originalSize, size_t prefixSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) const void *dictStart, size_t dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return LZ4_decompress_generic(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) 0, originalSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) endOnOutputSize, decode_full_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) usingExtDict, (BYTE *)dest - prefixSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) (const BYTE *)dictStart, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /* ===== streaming decompression functions ===== */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) int LZ4_setStreamDecode(LZ4_streamDecode_t *LZ4_streamDecode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) const char *dictionary, int dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) LZ4_streamDecode_t_internal *lz4sd =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) &LZ4_streamDecode->internal_donotuse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) lz4sd->prefixSize = (size_t) dictSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) lz4sd->prefixEnd = (const BYTE *) dictionary + dictSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) lz4sd->externalDict = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) lz4sd->extDictSize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * *_continue() :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * These decoding functions allow decompression of multiple blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * in "streaming" mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * Previously decoded blocks must still be available at the memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * position where they were decoded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * If it's not possible, save the relevant part of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * decoded data into a safe buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) * and indicate where it stands using LZ4_setStreamDecode()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) int LZ4_decompress_safe_continue(LZ4_streamDecode_t *LZ4_streamDecode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) const char *source, char *dest, int compressedSize, int maxOutputSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) LZ4_streamDecode_t_internal *lz4sd =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) &LZ4_streamDecode->internal_donotuse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (lz4sd->prefixSize == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) /* The first call, no dictionary yet. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) assert(lz4sd->extDictSize == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) result = LZ4_decompress_safe(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) compressedSize, maxOutputSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (result <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) lz4sd->prefixSize = result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) lz4sd->prefixEnd = (BYTE *)dest + result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) } else if (lz4sd->prefixEnd == (BYTE *)dest) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) /* They're rolling the current segment. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (lz4sd->prefixSize >= 64 * KB - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) result = LZ4_decompress_safe_withPrefix64k(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) compressedSize, maxOutputSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) else if (lz4sd->extDictSize == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) result = LZ4_decompress_safe_withSmallPrefix(source,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) dest, compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) lz4sd->prefixSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) result = LZ4_decompress_safe_doubleDict(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) lz4sd->prefixSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) lz4sd->externalDict, lz4sd->extDictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (result <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) lz4sd->prefixSize += result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) lz4sd->prefixEnd += result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * The buffer wraps around, or they're
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) * switching to another buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) lz4sd->extDictSize = lz4sd->prefixSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) result = LZ4_decompress_safe_forceExtDict(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) compressedSize, maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) lz4sd->externalDict, lz4sd->extDictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (result <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) lz4sd->prefixSize = result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) lz4sd->prefixEnd = (BYTE *)dest + result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) int LZ4_decompress_fast_continue(LZ4_streamDecode_t *LZ4_streamDecode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) const char *source, char *dest, int originalSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) LZ4_streamDecode_t_internal *lz4sd = &LZ4_streamDecode->internal_donotuse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (lz4sd->prefixSize == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) assert(lz4sd->extDictSize == 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) result = LZ4_decompress_fast(source, dest, originalSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if (result <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) lz4sd->prefixSize = originalSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) lz4sd->prefixEnd = (BYTE *)dest + originalSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) } else if (lz4sd->prefixEnd == (BYTE *)dest) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (lz4sd->prefixSize >= 64 * KB - 1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) lz4sd->extDictSize == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) result = LZ4_decompress_fast(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) originalSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) result = LZ4_decompress_fast_doubleDict(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) originalSize, lz4sd->prefixSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) lz4sd->externalDict, lz4sd->extDictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) if (result <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) lz4sd->prefixSize += originalSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) lz4sd->prefixEnd += originalSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) lz4sd->extDictSize = lz4sd->prefixSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) result = LZ4_decompress_fast_extDict(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) originalSize, lz4sd->externalDict, lz4sd->extDictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (result <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) lz4sd->prefixSize = originalSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) lz4sd->prefixEnd = (BYTE *)dest + originalSize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) int LZ4_decompress_safe_usingDict(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) int compressedSize, int maxOutputSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) const char *dictStart, int dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (dictSize == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return LZ4_decompress_safe(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) compressedSize, maxOutputSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) if (dictStart+dictSize == dest) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (dictSize >= 64 * KB - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) return LZ4_decompress_safe_withPrefix64k(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) compressedSize, maxOutputSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return LZ4_decompress_safe_withSmallPrefix(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) compressedSize, maxOutputSize, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) return LZ4_decompress_safe_forceExtDict(source, dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) compressedSize, maxOutputSize, dictStart, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) int LZ4_decompress_fast_usingDict(const char *source, char *dest,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) int originalSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) const char *dictStart, int dictSize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) if (dictSize == 0 || dictStart + dictSize == dest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) return LZ4_decompress_fast(source, dest, originalSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) return LZ4_decompress_fast_extDict(source, dest, originalSize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) dictStart, dictSize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) #ifndef STATIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) EXPORT_SYMBOL(LZ4_decompress_safe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) EXPORT_SYMBOL(LZ4_decompress_safe_partial);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) EXPORT_SYMBOL(LZ4_decompress_fast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) EXPORT_SYMBOL(LZ4_setStreamDecode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) EXPORT_SYMBOL(LZ4_decompress_safe_continue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) EXPORT_SYMBOL(LZ4_decompress_fast_continue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) EXPORT_SYMBOL(LZ4_decompress_safe_usingDict);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) EXPORT_SYMBOL(LZ4_decompress_fast_usingDict);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) MODULE_LICENSE("Dual BSD/GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) MODULE_DESCRIPTION("LZ4 decompressor");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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