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Posted to commits@nifi.apache.org by ph...@apache.org on 2018/06/06 14:15:09 UTC
[41/51] [partial] nifi-minifi-cpp git commit: MINIFICPP-512 - upgrade
to librdkafka 0.11.4
http://git-wip-us.apache.org/repos/asf/nifi-minifi-cpp/blob/7528d23e/thirdparty/librdkafka-0.11.1/src/lz4.c
----------------------------------------------------------------------
diff --git a/thirdparty/librdkafka-0.11.1/src/lz4.c b/thirdparty/librdkafka-0.11.1/src/lz4.c
deleted file mode 100644
index c9c5a07..0000000
--- a/thirdparty/librdkafka-0.11.1/src/lz4.c
+++ /dev/null
@@ -1,1462 +0,0 @@
-/*
- LZ4 - Fast LZ compression algorithm
- Copyright (C) 2011-2017, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * 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 COPYRIGHT HOLDERS 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 COPYRIGHT
- OWNER 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.
-
- You can contact the author at :
- - LZ4 homepage : http://www.lz4.org
- - LZ4 source repository : https://github.com/lz4/lz4
-*/
-
-
-/*-************************************
-* Tuning parameters
-**************************************/
-/*
- * HEAPMODE :
- * Select how default compression functions will allocate memory for their hash table,
- * in memory stack (0:default, fastest), or in memory heap (1:requires malloc()).
- */
-#ifndef HEAPMODE
-# define HEAPMODE 0
-#endif
-
-/*
- * ACCELERATION_DEFAULT :
- * Select "acceleration" for LZ4_compress_fast() when parameter value <= 0
- */
-#define ACCELERATION_DEFAULT 1
-
-
-/*-************************************
-* CPU Feature Detection
-**************************************/
-/* LZ4_FORCE_MEMORY_ACCESS
- * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
- * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
- * The below switch allow to select different access method for improved performance.
- * Method 0 (default) : use `memcpy()`. Safe and portable.
- * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable).
- * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
- * Method 2 : direct access. This method is portable but violate C standard.
- * It can generate buggy code on targets which assembly generation depends on alignment.
- * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6)
- * See https://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details.
- * Prefer these methods in priority order (0 > 1 > 2)
- */
-#ifndef LZ4_FORCE_MEMORY_ACCESS /* can be defined externally */
-# if defined(__GNUC__) && ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
-# define LZ4_FORCE_MEMORY_ACCESS 2
-# elif defined(__INTEL_COMPILER) || defined(__GNUC__)
-# define LZ4_FORCE_MEMORY_ACCESS 1
-# endif
-#endif
-
-/*
- * LZ4_FORCE_SW_BITCOUNT
- * Define this parameter if your target system or compiler does not support hardware bit count
- */
-#if defined(_MSC_VER) && defined(_WIN32_WCE) /* Visual Studio for Windows CE does not support Hardware bit count */
-# define LZ4_FORCE_SW_BITCOUNT
-#endif
-
-
-/*-************************************
-* Dependency
-**************************************/
-#include "lz4.h"
-/* see also "memory routines" below */
-
-
-/*-************************************
-* Compiler Options
-**************************************/
-#ifdef _MSC_VER /* Visual Studio */
-# define FORCE_INLINE static __forceinline
-# include <intrin.h>
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-# pragma warning(disable : 4293) /* disable: C4293: too large shift (32-bits) */
-#else
-# if defined(__GNUC__) || defined(__clang__)
-# define FORCE_INLINE static inline __attribute__((always_inline))
-# elif defined(__cplusplus) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-# define FORCE_INLINE static inline
-# else
-# define FORCE_INLINE static
-# endif
-#endif /* _MSC_VER */
-
-#if (defined(__GNUC__) && (__GNUC__ >= 3)) || (defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 800)) || defined(__clang__)
-# define expect(expr,value) (__builtin_expect ((expr),(value)) )
-#else
-# define expect(expr,value) (expr)
-#endif
-
-#define likely(expr) expect((expr) != 0, 1)
-#define unlikely(expr) expect((expr) != 0, 0)
-
-
-/*-************************************
-* Memory routines
-**************************************/
-#include <stdlib.h> /* malloc, calloc, free */
-#define ALLOCATOR(n,s) calloc(n,s)
-#define FREEMEM free
-#include <string.h> /* memset, memcpy */
-#define MEM_INIT memset
-
-
-/*-************************************
-* Basic Types
-**************************************/
-#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-# include <stdint.h>
- typedef uint8_t BYTE;
- typedef uint16_t U16;
- typedef uint32_t U32;
- typedef int32_t S32;
- typedef uint64_t U64;
- typedef uintptr_t uptrval;
-#else
- typedef unsigned char BYTE;
- typedef unsigned short U16;
- typedef unsigned int U32;
- typedef signed int S32;
- typedef unsigned long long U64;
- typedef size_t uptrval; /* generally true, except OpenVMS-64 */
-#endif
-
-#if defined(__x86_64__)
- typedef U64 reg_t; /* 64-bits in x32 mode */
-#else
- typedef size_t reg_t; /* 32-bits in x32 mode */
-#endif
-
-/*-************************************
-* Reading and writing into memory
-**************************************/
-static unsigned LZ4_isLittleEndian(void)
-{
- const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */
- return one.c[0];
-}
-
-
-#if defined(LZ4_FORCE_MEMORY_ACCESS) && (LZ4_FORCE_MEMORY_ACCESS==2)
-/* lie to the compiler about data alignment; use with caution */
-
-static U16 LZ4_read16(const void* memPtr) { return *(const U16*) memPtr; }
-static U32 LZ4_read32(const void* memPtr) { return *(const U32*) memPtr; }
-static reg_t LZ4_read_ARCH(const void* memPtr) { return *(const reg_t*) memPtr; }
-
-static void LZ4_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
-static void LZ4_write32(void* memPtr, U32 value) { *(U32*)memPtr = value; }
-
-#elif defined(LZ4_FORCE_MEMORY_ACCESS) && (LZ4_FORCE_MEMORY_ACCESS==1)
-
-/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
-/* currently only defined for gcc and icc */
-typedef union { U16 u16; U32 u32; reg_t uArch; } __attribute__((packed)) unalign;
-
-static U16 LZ4_read16(const void* ptr) { return ((const unalign*)ptr)->u16; }
-static U32 LZ4_read32(const void* ptr) { return ((const unalign*)ptr)->u32; }
-static reg_t LZ4_read_ARCH(const void* ptr) { return ((const unalign*)ptr)->uArch; }
-
-static void LZ4_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; }
-static void LZ4_write32(void* memPtr, U32 value) { ((unalign*)memPtr)->u32 = value; }
-
-#else /* safe and portable access through memcpy() */
-
-static U16 LZ4_read16(const void* memPtr)
-{
- U16 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-static U32 LZ4_read32(const void* memPtr)
-{
- U32 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-static reg_t LZ4_read_ARCH(const void* memPtr)
-{
- reg_t val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-static void LZ4_write16(void* memPtr, U16 value)
-{
- memcpy(memPtr, &value, sizeof(value));
-}
-
-static void LZ4_write32(void* memPtr, U32 value)
-{
- memcpy(memPtr, &value, sizeof(value));
-}
-
-#endif /* LZ4_FORCE_MEMORY_ACCESS */
-
-
-static U16 LZ4_readLE16(const void* memPtr)
-{
- if (LZ4_isLittleEndian()) {
- return LZ4_read16(memPtr);
- } else {
- const BYTE* p = (const BYTE*)memPtr;
- return (U16)((U16)p[0] + (p[1]<<8));
- }
-}
-
-static void LZ4_writeLE16(void* memPtr, U16 value)
-{
- if (LZ4_isLittleEndian()) {
- LZ4_write16(memPtr, value);
- } else {
- BYTE* p = (BYTE*)memPtr;
- p[0] = (BYTE) value;
- p[1] = (BYTE)(value>>8);
- }
-}
-
-static void LZ4_copy8(void* dst, const void* src)
-{
- memcpy(dst,src,8);
-}
-
-/* customized variant of memcpy, which can overwrite up to 8 bytes beyond dstEnd */
-static void LZ4_wildCopy(void* dstPtr, const void* srcPtr, void* dstEnd)
-{
- BYTE* d = (BYTE*)dstPtr;
- const BYTE* s = (const BYTE*)srcPtr;
- BYTE* const e = (BYTE*)dstEnd;
-
- do { LZ4_copy8(d,s); d+=8; s+=8; } while (d<e);
-}
-
-
-/*-************************************
-* Common Constants
-**************************************/
-#define MINMATCH 4
-
-#define WILDCOPYLENGTH 8
-#define LASTLITERALS 5
-#define MFLIMIT (WILDCOPYLENGTH+MINMATCH)
-static const int LZ4_minLength = (MFLIMIT+1);
-
-#define KB *(1 <<10)
-#define MB *(1 <<20)
-#define GB *(1U<<30)
-
-#define MAXD_LOG 16
-#define MAX_DISTANCE ((1 << MAXD_LOG) - 1)
-
-#define ML_BITS 4
-#define ML_MASK ((1U<<ML_BITS)-1)
-#define RUN_BITS (8-ML_BITS)
-#define RUN_MASK ((1U<<RUN_BITS)-1)
-
-
-/*-************************************
-* Common Utils
-**************************************/
-#define LZ4_STATIC_ASSERT(c) { enum { LZ4_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
-
-
-/*-************************************
-* Common functions
-**************************************/
-static unsigned LZ4_NbCommonBytes (register reg_t val)
-{
- if (LZ4_isLittleEndian()) {
- if (sizeof(val)==8) {
-# if defined(_MSC_VER) && defined(_WIN64) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r = 0;
- _BitScanForward64( &r, (U64)val );
- return (int)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (__builtin_ctzll((U64)val) >> 3);
-# else
- static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 };
- return DeBruijnBytePos[((U64)((val & -(long long)val) * 0x0218A392CDABBD3FULL)) >> 58];
-# endif
- } else /* 32 bits */ {
-# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r;
- _BitScanForward( &r, (U32)val );
- return (int)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (__builtin_ctz((U32)val) >> 3);
-# else
- static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 };
- return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27];
-# endif
- }
- } else /* Big Endian CPU */ {
- if (sizeof(val)==8) {
-# if defined(_MSC_VER) && defined(_WIN64) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r = 0;
- _BitScanReverse64( &r, val );
- return (unsigned)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (__builtin_clzll((U64)val) >> 3);
-# else
- unsigned r;
- if (!(val>>32)) { r=4; } else { r=0; val>>=32; }
- if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
- r += (!val);
- return r;
-# endif
- } else /* 32 bits */ {
-# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r = 0;
- _BitScanReverse( &r, (unsigned long)val );
- return (unsigned)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (__builtin_clz((U32)val) >> 3);
-# else
- unsigned r;
- if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
- r += (!val);
- return r;
-# endif
- }
- }
-}
-
-#define STEPSIZE sizeof(reg_t)
-static unsigned LZ4_count(const BYTE* pIn, const BYTE* pMatch, const BYTE* pInLimit)
-{
- const BYTE* const pStart = pIn;
-
- while (likely(pIn<pInLimit-(STEPSIZE-1))) {
- reg_t const diff = LZ4_read_ARCH(pMatch) ^ LZ4_read_ARCH(pIn);
- if (!diff) { pIn+=STEPSIZE; pMatch+=STEPSIZE; continue; }
- pIn += LZ4_NbCommonBytes(diff);
- return (unsigned)(pIn - pStart);
- }
-
- if ((STEPSIZE==8) && (pIn<(pInLimit-3)) && (LZ4_read32(pMatch) == LZ4_read32(pIn))) { pIn+=4; pMatch+=4; }
- if ((pIn<(pInLimit-1)) && (LZ4_read16(pMatch) == LZ4_read16(pIn))) { pIn+=2; pMatch+=2; }
- if ((pIn<pInLimit) && (*pMatch == *pIn)) pIn++;
- return (unsigned)(pIn - pStart);
-}
-
-
-#ifndef LZ4_COMMONDEFS_ONLY
-/*-************************************
-* Local Constants
-**************************************/
-static const int LZ4_64Klimit = ((64 KB) + (MFLIMIT-1));
-static const U32 LZ4_skipTrigger = 6; /* Increase this value ==> compression run slower on incompressible data */
-
-
-/*-************************************
-* Local Structures and types
-**************************************/
-typedef enum { notLimited = 0, limitedOutput = 1 } limitedOutput_directive;
-typedef enum { byPtr, byU32, byU16 } tableType_t;
-
-typedef enum { noDict = 0, withPrefix64k, usingExtDict } dict_directive;
-typedef enum { noDictIssue = 0, dictSmall } dictIssue_directive;
-
-typedef enum { endOnOutputSize = 0, endOnInputSize = 1 } endCondition_directive;
-typedef enum { full = 0, partial = 1 } earlyEnd_directive;
-
-
-/*-************************************
-* Local Utils
-**************************************/
-int LZ4_versionNumber (void) { return LZ4_VERSION_NUMBER; }
-const char* LZ4_versionString(void) { return LZ4_VERSION_STRING; }
-int LZ4_compressBound(int isize) { return LZ4_COMPRESSBOUND(isize); }
-int LZ4_sizeofState() { return LZ4_STREAMSIZE; }
-
-
-/*-******************************
-* Compression functions
-********************************/
-static U32 LZ4_hash4(U32 sequence, tableType_t const tableType)
-{
- if (tableType == byU16)
- return ((sequence * 2654435761U) >> ((MINMATCH*8)-(LZ4_HASHLOG+1)));
- else
- return ((sequence * 2654435761U) >> ((MINMATCH*8)-LZ4_HASHLOG));
-}
-
-static U32 LZ4_hash5(U64 sequence, tableType_t const tableType)
-{
- static const U64 prime5bytes = 889523592379ULL;
- static const U64 prime8bytes = 11400714785074694791ULL;
- const U32 hashLog = (tableType == byU16) ? LZ4_HASHLOG+1 : LZ4_HASHLOG;
- if (LZ4_isLittleEndian())
- return (U32)(((sequence << 24) * prime5bytes) >> (64 - hashLog));
- else
- return (U32)(((sequence >> 24) * prime8bytes) >> (64 - hashLog));
-}
-
-FORCE_INLINE U32 LZ4_hashPosition(const void* const p, tableType_t const tableType)
-{
- if ((sizeof(reg_t)==8) && (tableType != byU16)) return LZ4_hash5(LZ4_read_ARCH(p), tableType);
- return LZ4_hash4(LZ4_read32(p), tableType);
-}
-
-static void LZ4_putPositionOnHash(const BYTE* p, U32 h, void* tableBase, tableType_t const tableType, const BYTE* srcBase)
-{
- switch (tableType)
- {
- case byPtr: { const BYTE** hashTable = (const BYTE**)tableBase; hashTable[h] = p; return; }
- case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = (U32)(p-srcBase); return; }
- case byU16: { U16* hashTable = (U16*) tableBase; hashTable[h] = (U16)(p-srcBase); return; }
- }
-}
-
-FORCE_INLINE void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase)
-{
- U32 const h = LZ4_hashPosition(p, tableType);
- LZ4_putPositionOnHash(p, h, tableBase, tableType, srcBase);
-}
-
-static const BYTE* LZ4_getPositionOnHash(U32 h, void* tableBase, tableType_t tableType, const BYTE* srcBase)
-{
- if (tableType == byPtr) { const BYTE** hashTable = (const BYTE**) tableBase; return hashTable[h]; }
- if (tableType == byU32) { const U32* const hashTable = (U32*) tableBase; return hashTable[h] + srcBase; }
- { const U16* const hashTable = (U16*) tableBase; return hashTable[h] + srcBase; } /* default, to ensure a return */
-}
-
-FORCE_INLINE const BYTE* LZ4_getPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase)
-{
- U32 const h = LZ4_hashPosition(p, tableType);
- return LZ4_getPositionOnHash(h, tableBase, tableType, srcBase);
-}
-
-
-/** LZ4_compress_generic() :
- inlined, to ensure branches are decided at compilation time */
-FORCE_INLINE int LZ4_compress_generic(
- LZ4_stream_t_internal* const cctx,
- const char* const source,
- char* const dest,
- const int inputSize,
- const int maxOutputSize,
- const limitedOutput_directive outputLimited,
- const tableType_t tableType,
- const dict_directive dict,
- const dictIssue_directive dictIssue,
- const U32 acceleration)
-{
- const BYTE* ip = (const BYTE*) source;
- const BYTE* base;
- const BYTE* lowLimit;
- const BYTE* const lowRefLimit = ip - cctx->dictSize;
- const BYTE* const dictionary = cctx->dictionary;
- const BYTE* const dictEnd = dictionary + cctx->dictSize;
- const ptrdiff_t dictDelta = dictEnd - (const BYTE*)source;
- const BYTE* anchor = (const BYTE*) source;
- const BYTE* const iend = ip + inputSize;
- const BYTE* const mflimit = iend - MFLIMIT;
- const BYTE* const matchlimit = iend - LASTLITERALS;
-
- BYTE* op = (BYTE*) dest;
- BYTE* const olimit = op + maxOutputSize;
-
- U32 forwardH;
-
- /* Init conditions */
- if ((U32)inputSize > (U32)LZ4_MAX_INPUT_SIZE) return 0; /* Unsupported inputSize, too large (or negative) */
- switch(dict)
- {
- case noDict:
- default:
- base = (const BYTE*)source;
- lowLimit = (const BYTE*)source;
- break;
- case withPrefix64k:
- base = (const BYTE*)source - cctx->currentOffset;
- lowLimit = (const BYTE*)source - cctx->dictSize;
- break;
- case usingExtDict:
- base = (const BYTE*)source - cctx->currentOffset;
- lowLimit = (const BYTE*)source;
- break;
- }
- if ((tableType == byU16) && (inputSize>=LZ4_64Klimit)) return 0; /* Size too large (not within 64K limit) */
- if (inputSize<LZ4_minLength) goto _last_literals; /* Input too small, no compression (all literals) */
-
- /* First Byte */
- LZ4_putPosition(ip, cctx->hashTable, tableType, base);
- ip++; forwardH = LZ4_hashPosition(ip, tableType);
-
- /* Main Loop */
- for ( ; ; ) {
- ptrdiff_t refDelta = 0;
- const BYTE* match;
- BYTE* token;
-
- /* Find a match */
- { const BYTE* forwardIp = ip;
- unsigned step = 1;
- unsigned searchMatchNb = acceleration << LZ4_skipTrigger;
- do {
- U32 const h = forwardH;
- ip = forwardIp;
- forwardIp += step;
- step = (searchMatchNb++ >> LZ4_skipTrigger);
-
- if (unlikely(forwardIp > mflimit)) goto _last_literals;
-
- match = LZ4_getPositionOnHash(h, cctx->hashTable, tableType, base);
- if (dict==usingExtDict) {
- if (match < (const BYTE*)source) {
- refDelta = dictDelta;
- lowLimit = dictionary;
- } else {
- refDelta = 0;
- lowLimit = (const BYTE*)source;
- } }
- forwardH = LZ4_hashPosition(forwardIp, tableType);
- LZ4_putPositionOnHash(ip, h, cctx->hashTable, tableType, base);
-
- } while ( ((dictIssue==dictSmall) ? (match < lowRefLimit) : 0)
- || ((tableType==byU16) ? 0 : (match + MAX_DISTANCE < ip))
- || (LZ4_read32(match+refDelta) != LZ4_read32(ip)) );
- }
-
- /* Catch up */
- while (((ip>anchor) & (match+refDelta > lowLimit)) && (unlikely(ip[-1]==match[refDelta-1]))) { ip--; match--; }
-
- /* Encode Literals */
- { unsigned const litLength = (unsigned)(ip - anchor);
- token = op++;
- if ((outputLimited) && /* Check output buffer overflow */
- (unlikely(op + litLength + (2 + 1 + LASTLITERALS) + (litLength/255) > olimit)))
- return 0;
- if (litLength >= RUN_MASK) {
- int len = (int)litLength-RUN_MASK;
- *token = (RUN_MASK<<ML_BITS);
- for(; len >= 255 ; len-=255) *op++ = 255;
- *op++ = (BYTE)len;
- }
- else *token = (BYTE)(litLength<<ML_BITS);
-
- /* Copy Literals */
- LZ4_wildCopy(op, anchor, op+litLength);
- op+=litLength;
- }
-
-_next_match:
- /* Encode Offset */
- LZ4_writeLE16(op, (U16)(ip-match)); op+=2;
-
- /* Encode MatchLength */
- { unsigned matchCode;
-
- if ((dict==usingExtDict) && (lowLimit==dictionary)) {
- const BYTE* limit;
- match += refDelta;
- limit = ip + (dictEnd-match);
- if (limit > matchlimit) limit = matchlimit;
- matchCode = LZ4_count(ip+MINMATCH, match+MINMATCH, limit);
- ip += MINMATCH + matchCode;
- if (ip==limit) {
- unsigned const more = LZ4_count(ip, (const BYTE*)source, matchlimit);
- matchCode += more;
- ip += more;
- }
- } else {
- matchCode = LZ4_count(ip+MINMATCH, match+MINMATCH, matchlimit);
- ip += MINMATCH + matchCode;
- }
-
- if ( outputLimited && /* Check output buffer overflow */
- (unlikely(op + (1 + LASTLITERALS) + (matchCode>>8) > olimit)) )
- return 0;
- if (matchCode >= ML_MASK) {
- *token += ML_MASK;
- matchCode -= ML_MASK;
- LZ4_write32(op, 0xFFFFFFFF);
- while (matchCode >= 4*255) op+=4, LZ4_write32(op, 0xFFFFFFFF), matchCode -= 4*255;
- op += matchCode / 255;
- *op++ = (BYTE)(matchCode % 255);
- } else
- *token += (BYTE)(matchCode);
- }
-
- anchor = ip;
-
- /* Test end of chunk */
- if (ip > mflimit) break;
-
- /* Fill table */
- LZ4_putPosition(ip-2, cctx->hashTable, tableType, base);
-
- /* Test next position */
- match = LZ4_getPosition(ip, cctx->hashTable, tableType, base);
- if (dict==usingExtDict) {
- if (match < (const BYTE*)source) {
- refDelta = dictDelta;
- lowLimit = dictionary;
- } else {
- refDelta = 0;
- lowLimit = (const BYTE*)source;
- } }
- LZ4_putPosition(ip, cctx->hashTable, tableType, base);
- if ( ((dictIssue==dictSmall) ? (match>=lowRefLimit) : 1)
- && (match+MAX_DISTANCE>=ip)
- && (LZ4_read32(match+refDelta)==LZ4_read32(ip)) )
- { token=op++; *token=0; goto _next_match; }
-
- /* Prepare next loop */
- forwardH = LZ4_hashPosition(++ip, tableType);
- }
-
-_last_literals:
- /* Encode Last Literals */
- { size_t const lastRun = (size_t)(iend - anchor);
- if ( (outputLimited) && /* Check output buffer overflow */
- ((op - (BYTE*)dest) + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > (U32)maxOutputSize) )
- return 0;
- if (lastRun >= RUN_MASK) {
- size_t accumulator = lastRun - RUN_MASK;
- *op++ = RUN_MASK << ML_BITS;
- for(; accumulator >= 255 ; accumulator-=255) *op++ = 255;
- *op++ = (BYTE) accumulator;
- } else {
- *op++ = (BYTE)(lastRun<<ML_BITS);
- }
- memcpy(op, anchor, lastRun);
- op += lastRun;
- }
-
- /* End */
- return (int) (((char*)op)-dest);
-}
-
-
-int LZ4_compress_fast_extState(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
-{
- LZ4_stream_t_internal* ctx = &((LZ4_stream_t*)state)->internal_donotuse;
- LZ4_resetStream((LZ4_stream_t*)state);
- if (acceleration < 1) acceleration = ACCELERATION_DEFAULT;
-
- if (maxOutputSize >= LZ4_compressBound(inputSize)) {
- if (inputSize < LZ4_64Klimit)
- return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, byU16, noDict, noDictIssue, acceleration);
- else
- return LZ4_compress_generic(ctx, source, dest, inputSize, 0, notLimited, (sizeof(void*)==8) ? byU32 : byPtr, noDict, noDictIssue, acceleration);
- } else {
- if (inputSize < LZ4_64Klimit)
- return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue, acceleration);
- else
- return LZ4_compress_generic(ctx, source, dest, inputSize, maxOutputSize, limitedOutput, (sizeof(void*)==8) ? byU32 : byPtr, noDict, noDictIssue, acceleration);
- }
-}
-
-
-int LZ4_compress_fast(const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
-{
-#if (HEAPMODE)
- void* ctxPtr = ALLOCATOR(1, sizeof(LZ4_stream_t)); /* malloc-calloc always properly aligned */
-#else
- LZ4_stream_t ctx;
- void* const ctxPtr = &ctx;
-#endif
-
- int const result = LZ4_compress_fast_extState(ctxPtr, source, dest, inputSize, maxOutputSize, acceleration);
-
-#if (HEAPMODE)
- FREEMEM(ctxPtr);
-#endif
- return result;
-}
-
-
-int LZ4_compress_default(const char* source, char* dest, int inputSize, int maxOutputSize)
-{
- return LZ4_compress_fast(source, dest, inputSize, maxOutputSize, 1);
-}
-
-
-/* hidden debug function */
-/* strangely enough, gcc generates faster code when this function is uncommented, even if unused */
-int LZ4_compress_fast_force(const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
-{
- LZ4_stream_t ctx;
- LZ4_resetStream(&ctx);
-
- if (inputSize < LZ4_64Klimit)
- return LZ4_compress_generic(&ctx.internal_donotuse, source, dest, inputSize, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue, acceleration);
- else
- return LZ4_compress_generic(&ctx.internal_donotuse, source, dest, inputSize, maxOutputSize, limitedOutput, sizeof(void*)==8 ? byU32 : byPtr, noDict, noDictIssue, acceleration);
-}
-
-
-/*-******************************
-* *_destSize() variant
-********************************/
-
-static int LZ4_compress_destSize_generic(
- LZ4_stream_t_internal* const ctx,
- const char* const src,
- char* const dst,
- int* const srcSizePtr,
- const int targetDstSize,
- const tableType_t tableType)
-{
- const BYTE* ip = (const BYTE*) src;
- const BYTE* base = (const BYTE*) src;
- const BYTE* lowLimit = (const BYTE*) src;
- const BYTE* anchor = ip;
- const BYTE* const iend = ip + *srcSizePtr;
- const BYTE* const mflimit = iend - MFLIMIT;
- const BYTE* const matchlimit = iend - LASTLITERALS;
-
- BYTE* op = (BYTE*) dst;
- BYTE* const oend = op + targetDstSize;
- BYTE* const oMaxLit = op + targetDstSize - 2 /* offset */ - 8 /* because 8+MINMATCH==MFLIMIT */ - 1 /* token */;
- BYTE* const oMaxMatch = op + targetDstSize - (LASTLITERALS + 1 /* token */);
- BYTE* const oMaxSeq = oMaxLit - 1 /* token */;
-
- U32 forwardH;
-
-
- /* Init conditions */
- if (targetDstSize < 1) return 0; /* Impossible to store anything */
- if ((U32)*srcSizePtr > (U32)LZ4_MAX_INPUT_SIZE) return 0; /* Unsupported input size, too large (or negative) */
- if ((tableType == byU16) && (*srcSizePtr>=LZ4_64Klimit)) return 0; /* Size too large (not within 64K limit) */
- if (*srcSizePtr<LZ4_minLength) goto _last_literals; /* Input too small, no compression (all literals) */
-
- /* First Byte */
- *srcSizePtr = 0;
- LZ4_putPosition(ip, ctx->hashTable, tableType, base);
- ip++; forwardH = LZ4_hashPosition(ip, tableType);
-
- /* Main Loop */
- for ( ; ; ) {
- const BYTE* match;
- BYTE* token;
-
- /* Find a match */
- { const BYTE* forwardIp = ip;
- unsigned step = 1;
- unsigned searchMatchNb = 1 << LZ4_skipTrigger;
-
- do {
- U32 h = forwardH;
- ip = forwardIp;
- forwardIp += step;
- step = (searchMatchNb++ >> LZ4_skipTrigger);
-
- if (unlikely(forwardIp > mflimit)) goto _last_literals;
-
- match = LZ4_getPositionOnHash(h, ctx->hashTable, tableType, base);
- forwardH = LZ4_hashPosition(forwardIp, tableType);
- LZ4_putPositionOnHash(ip, h, ctx->hashTable, tableType, base);
-
- } while ( ((tableType==byU16) ? 0 : (match + MAX_DISTANCE < ip))
- || (LZ4_read32(match) != LZ4_read32(ip)) );
- }
-
- /* Catch up */
- while ((ip>anchor) && (match > lowLimit) && (unlikely(ip[-1]==match[-1]))) { ip--; match--; }
-
- /* Encode Literal length */
- { unsigned litLength = (unsigned)(ip - anchor);
- token = op++;
- if (op + ((litLength+240)/255) + litLength > oMaxLit) {
- /* Not enough space for a last match */
- op--;
- goto _last_literals;
- }
- if (litLength>=RUN_MASK) {
- unsigned len = litLength - RUN_MASK;
- *token=(RUN_MASK<<ML_BITS);
- for(; len >= 255 ; len-=255) *op++ = 255;
- *op++ = (BYTE)len;
- }
- else *token = (BYTE)(litLength<<ML_BITS);
-
- /* Copy Literals */
- LZ4_wildCopy(op, anchor, op+litLength);
- op += litLength;
- }
-
-_next_match:
- /* Encode Offset */
- LZ4_writeLE16(op, (U16)(ip-match)); op+=2;
-
- /* Encode MatchLength */
- { size_t matchLength = LZ4_count(ip+MINMATCH, match+MINMATCH, matchlimit);
-
- if (op + ((matchLength+240)/255) > oMaxMatch) {
- /* Match description too long : reduce it */
- matchLength = (15-1) + (oMaxMatch-op) * 255;
- }
- ip += MINMATCH + matchLength;
-
- if (matchLength>=ML_MASK) {
- *token += ML_MASK;
- matchLength -= ML_MASK;
- while (matchLength >= 255) { matchLength-=255; *op++ = 255; }
- *op++ = (BYTE)matchLength;
- }
- else *token += (BYTE)(matchLength);
- }
-
- anchor = ip;
-
- /* Test end of block */
- if (ip > mflimit) break;
- if (op > oMaxSeq) break;
-
- /* Fill table */
- LZ4_putPosition(ip-2, ctx->hashTable, tableType, base);
-
- /* Test next position */
- match = LZ4_getPosition(ip, ctx->hashTable, tableType, base);
- LZ4_putPosition(ip, ctx->hashTable, tableType, base);
- if ( (match+MAX_DISTANCE>=ip)
- && (LZ4_read32(match)==LZ4_read32(ip)) )
- { token=op++; *token=0; goto _next_match; }
-
- /* Prepare next loop */
- forwardH = LZ4_hashPosition(++ip, tableType);
- }
-
-_last_literals:
- /* Encode Last Literals */
- { size_t lastRunSize = (size_t)(iend - anchor);
- if (op + 1 /* token */ + ((lastRunSize+240)/255) /* litLength */ + lastRunSize /* literals */ > oend) {
- /* adapt lastRunSize to fill 'dst' */
- lastRunSize = (oend-op) - 1;
- lastRunSize -= (lastRunSize+240)/255;
- }
- ip = anchor + lastRunSize;
-
- if (lastRunSize >= RUN_MASK) {
- size_t accumulator = lastRunSize - RUN_MASK;
- *op++ = RUN_MASK << ML_BITS;
- for(; accumulator >= 255 ; accumulator-=255) *op++ = 255;
- *op++ = (BYTE) accumulator;
- } else {
- *op++ = (BYTE)(lastRunSize<<ML_BITS);
- }
- memcpy(op, anchor, lastRunSize);
- op += lastRunSize;
- }
-
- /* End */
- *srcSizePtr = (int) (((const char*)ip)-src);
- return (int) (((char*)op)-dst);
-}
-
-
-static int LZ4_compress_destSize_extState (LZ4_stream_t* state, const char* src, char* dst, int* srcSizePtr, int targetDstSize)
-{
- LZ4_resetStream(state);
-
- if (targetDstSize >= LZ4_compressBound(*srcSizePtr)) { /* compression success is guaranteed */
- return LZ4_compress_fast_extState(state, src, dst, *srcSizePtr, targetDstSize, 1);
- } else {
- if (*srcSizePtr < LZ4_64Klimit)
- return LZ4_compress_destSize_generic(&state->internal_donotuse, src, dst, srcSizePtr, targetDstSize, byU16);
- else
- return LZ4_compress_destSize_generic(&state->internal_donotuse, src, dst, srcSizePtr, targetDstSize, sizeof(void*)==8 ? byU32 : byPtr);
- }
-}
-
-
-int LZ4_compress_destSize(const char* src, char* dst, int* srcSizePtr, int targetDstSize)
-{
-#if (HEAPMODE)
- LZ4_stream_t* ctx = (LZ4_stream_t*)ALLOCATOR(1, sizeof(LZ4_stream_t)); /* malloc-calloc always properly aligned */
-#else
- LZ4_stream_t ctxBody;
- LZ4_stream_t* ctx = &ctxBody;
-#endif
-
- int result = LZ4_compress_destSize_extState(ctx, src, dst, srcSizePtr, targetDstSize);
-
-#if (HEAPMODE)
- FREEMEM(ctx);
-#endif
- return result;
-}
-
-
-
-/*-******************************
-* Streaming functions
-********************************/
-
-LZ4_stream_t* LZ4_createStream(void)
-{
- LZ4_stream_t* lz4s = (LZ4_stream_t*)ALLOCATOR(8, LZ4_STREAMSIZE_U64);
- LZ4_STATIC_ASSERT(LZ4_STREAMSIZE >= sizeof(LZ4_stream_t_internal)); /* A compilation error here means LZ4_STREAMSIZE is not large enough */
- LZ4_resetStream(lz4s);
- return lz4s;
-}
-
-void LZ4_resetStream (LZ4_stream_t* LZ4_stream)
-{
- MEM_INIT(LZ4_stream, 0, sizeof(LZ4_stream_t));
-}
-
-int LZ4_freeStream (LZ4_stream_t* LZ4_stream)
-{
- FREEMEM(LZ4_stream);
- return (0);
-}
-
-
-#define HASH_UNIT sizeof(reg_t)
-int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
-{
- LZ4_stream_t_internal* dict = &LZ4_dict->internal_donotuse;
- const BYTE* p = (const BYTE*)dictionary;
- const BYTE* const dictEnd = p + dictSize;
- const BYTE* base;
-
- if ((dict->initCheck) || (dict->currentOffset > 1 GB)) /* Uninitialized structure, or reuse overflow */
- LZ4_resetStream(LZ4_dict);
-
- if (dictSize < (int)HASH_UNIT) {
- dict->dictionary = NULL;
- dict->dictSize = 0;
- return 0;
- }
-
- if ((dictEnd - p) > 64 KB) p = dictEnd - 64 KB;
- dict->currentOffset += 64 KB;
- base = p - dict->currentOffset;
- dict->dictionary = p;
- dict->dictSize = (U32)(dictEnd - p);
- dict->currentOffset += dict->dictSize;
-
- while (p <= dictEnd-HASH_UNIT) {
- LZ4_putPosition(p, dict->hashTable, byU32, base);
- p+=3;
- }
-
- return dict->dictSize;
-}
-
-
-static void LZ4_renormDictT(LZ4_stream_t_internal* LZ4_dict, const BYTE* src)
-{
- if ((LZ4_dict->currentOffset > 0x80000000) ||
- ((uptrval)LZ4_dict->currentOffset > (uptrval)src)) { /* address space overflow */
- /* rescale hash table */
- U32 const delta = LZ4_dict->currentOffset - 64 KB;
- const BYTE* dictEnd = LZ4_dict->dictionary + LZ4_dict->dictSize;
- int i;
- for (i=0; i<LZ4_HASH_SIZE_U32; i++) {
- if (LZ4_dict->hashTable[i] < delta) LZ4_dict->hashTable[i]=0;
- else LZ4_dict->hashTable[i] -= delta;
- }
- LZ4_dict->currentOffset = 64 KB;
- if (LZ4_dict->dictSize > 64 KB) LZ4_dict->dictSize = 64 KB;
- LZ4_dict->dictionary = dictEnd - LZ4_dict->dictSize;
- }
-}
-
-
-int LZ4_compress_fast_continue (LZ4_stream_t* LZ4_stream, const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
-{
- LZ4_stream_t_internal* streamPtr = &LZ4_stream->internal_donotuse;
- const BYTE* const dictEnd = streamPtr->dictionary + streamPtr->dictSize;
-
- const BYTE* smallest = (const BYTE*) source;
- if (streamPtr->initCheck) return 0; /* Uninitialized structure detected */
- if ((streamPtr->dictSize>0) && (smallest>dictEnd)) smallest = dictEnd;
- LZ4_renormDictT(streamPtr, smallest);
- if (acceleration < 1) acceleration = ACCELERATION_DEFAULT;
-
- /* Check overlapping input/dictionary space */
- { const BYTE* sourceEnd = (const BYTE*) source + inputSize;
- if ((sourceEnd > streamPtr->dictionary) && (sourceEnd < dictEnd)) {
- streamPtr->dictSize = (U32)(dictEnd - sourceEnd);
- if (streamPtr->dictSize > 64 KB) streamPtr->dictSize = 64 KB;
- if (streamPtr->dictSize < 4) streamPtr->dictSize = 0;
- streamPtr->dictionary = dictEnd - streamPtr->dictSize;
- }
- }
-
- /* prefix mode : source data follows dictionary */
- if (dictEnd == (const BYTE*)source) {
- int result;
- if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset))
- result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, byU32, withPrefix64k, dictSmall, acceleration);
- else
- result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, byU32, withPrefix64k, noDictIssue, acceleration);
- streamPtr->dictSize += (U32)inputSize;
- streamPtr->currentOffset += (U32)inputSize;
- return result;
- }
-
- /* external dictionary mode */
- { int result;
- if ((streamPtr->dictSize < 64 KB) && (streamPtr->dictSize < streamPtr->currentOffset))
- result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, byU32, usingExtDict, dictSmall, acceleration);
- else
- result = LZ4_compress_generic(streamPtr, source, dest, inputSize, maxOutputSize, limitedOutput, byU32, usingExtDict, noDictIssue, acceleration);
- streamPtr->dictionary = (const BYTE*)source;
- streamPtr->dictSize = (U32)inputSize;
- streamPtr->currentOffset += (U32)inputSize;
- return result;
- }
-}
-
-
-/* Hidden debug function, to force external dictionary mode */
-int LZ4_compress_forceExtDict (LZ4_stream_t* LZ4_dict, const char* source, char* dest, int inputSize)
-{
- LZ4_stream_t_internal* streamPtr = &LZ4_dict->internal_donotuse;
- int result;
- const BYTE* const dictEnd = streamPtr->dictionary + streamPtr->dictSize;
-
- const BYTE* smallest = dictEnd;
- if (smallest > (const BYTE*) source) smallest = (const BYTE*) source;
- LZ4_renormDictT(streamPtr, smallest);
-
- result = LZ4_compress_generic(streamPtr, source, dest, inputSize, 0, notLimited, byU32, usingExtDict, noDictIssue, 1);
-
- streamPtr->dictionary = (const BYTE*)source;
- streamPtr->dictSize = (U32)inputSize;
- streamPtr->currentOffset += (U32)inputSize;
-
- return result;
-}
-
-
-/*! LZ4_saveDict() :
- * If previously compressed data block is not guaranteed to remain available at its memory location,
- * save it into a safer place (char* safeBuffer).
- * Note : you don't need to call LZ4_loadDict() afterwards,
- * dictionary is immediately usable, you can therefore call LZ4_compress_fast_continue().
- * Return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.
- */
-int LZ4_saveDict (LZ4_stream_t* LZ4_dict, char* safeBuffer, int dictSize)
-{
- LZ4_stream_t_internal* const dict = &LZ4_dict->internal_donotuse;
- const BYTE* const previousDictEnd = dict->dictionary + dict->dictSize;
-
- if ((U32)dictSize > 64 KB) dictSize = 64 KB; /* useless to define a dictionary > 64 KB */
- if ((U32)dictSize > dict->dictSize) dictSize = dict->dictSize;
-
- memmove(safeBuffer, previousDictEnd - dictSize, dictSize);
-
- dict->dictionary = (const BYTE*)safeBuffer;
- dict->dictSize = (U32)dictSize;
-
- return dictSize;
-}
-
-
-
-/*-*****************************
-* Decompression functions
-*******************************/
-/*! LZ4_decompress_generic() :
- * This generic decompression function cover all use cases.
- * It shall be instantiated several times, using different sets of directives
- * Note that it is important this generic function is really inlined,
- * in order to remove useless branches during compilation optimization.
- */
-FORCE_INLINE int LZ4_decompress_generic(
- const char* const source,
- char* const dest,
- int inputSize,
- int outputSize, /* If endOnInput==endOnInputSize, this value is the max size of Output Buffer. */
-
- int endOnInput, /* endOnOutputSize, endOnInputSize */
- int partialDecoding, /* full, partial */
- int targetOutputSize, /* only used if partialDecoding==partial */
- int dict, /* noDict, withPrefix64k, usingExtDict */
- const BYTE* const lowPrefix, /* == dest when no prefix */
- const BYTE* const dictStart, /* only if dict==usingExtDict */
- const size_t dictSize /* note : = 0 if noDict */
- )
-{
- /* Local Variables */
- const BYTE* ip = (const BYTE*) source;
- const BYTE* const iend = ip + inputSize;
-
- BYTE* op = (BYTE*) dest;
- BYTE* const oend = op + outputSize;
- BYTE* cpy;
- BYTE* oexit = op + targetOutputSize;
- const BYTE* const lowLimit = lowPrefix - dictSize;
-
- const BYTE* const dictEnd = (const BYTE*)dictStart + dictSize;
- const unsigned dec32table[] = {0, 1, 2, 1, 4, 4, 4, 4};
- const int dec64table[] = {0, 0, 0, -1, 0, 1, 2, 3};
-
- const int safeDecode = (endOnInput==endOnInputSize);
- const int checkOffset = ((safeDecode) && (dictSize < (int)(64 KB)));
-
-
- /* Special cases */
- if ((partialDecoding) && (oexit > oend-MFLIMIT)) oexit = oend-MFLIMIT; /* targetOutputSize too high => decode everything */
- if ((endOnInput) && (unlikely(outputSize==0))) return ((inputSize==1) && (*ip==0)) ? 0 : -1; /* Empty output buffer */
- if ((!endOnInput) && (unlikely(outputSize==0))) return (*ip==0?1:-1);
-
- /* Main Loop : decode sequences */
- while (1) {
- size_t length;
- const BYTE* match;
- size_t offset;
-
- /* get literal length */
- unsigned const token = *ip++;
- if ((length=(token>>ML_BITS)) == RUN_MASK) {
- unsigned s;
- do {
- s = *ip++;
- length += s;
- } while ( likely(endOnInput ? ip<iend-RUN_MASK : 1) & (s==255) );
- if ((safeDecode) && unlikely((uptrval)(op)+length<(uptrval)(op))) goto _output_error; /* overflow detection */
- if ((safeDecode) && unlikely((uptrval)(ip)+length<(uptrval)(ip))) goto _output_error; /* overflow detection */
- }
-
- /* copy literals */
- cpy = op+length;
- if ( ((endOnInput) && ((cpy>(partialDecoding?oexit:oend-MFLIMIT)) || (ip+length>iend-(2+1+LASTLITERALS))) )
- || ((!endOnInput) && (cpy>oend-WILDCOPYLENGTH)) )
- {
- if (partialDecoding) {
- if (cpy > oend) goto _output_error; /* Error : write attempt beyond end of output buffer */
- if ((endOnInput) && (ip+length > iend)) goto _output_error; /* Error : read attempt beyond end of input buffer */
- } else {
- if ((!endOnInput) && (cpy != oend)) goto _output_error; /* Error : block decoding must stop exactly there */
- if ((endOnInput) && ((ip+length != iend) || (cpy > oend))) goto _output_error; /* Error : input must be consumed */
- }
- memcpy(op, ip, length);
- ip += length;
- op += length;
- break; /* Necessarily EOF, due to parsing restrictions */
- }
- LZ4_wildCopy(op, ip, cpy);
- ip += length; op = cpy;
-
- /* get offset */
- offset = LZ4_readLE16(ip); ip+=2;
- match = op - offset;
- if ((checkOffset) && (unlikely(match < lowLimit))) goto _output_error; /* Error : offset outside buffers */
- LZ4_write32(op, (U32)offset); /* costs ~1%; silence an msan warning when offset==0 */
-
- /* get matchlength */
- length = token & ML_MASK;
- if (length == ML_MASK) {
- unsigned s;
- do {
- s = *ip++;
- if ((endOnInput) && (ip > iend-LASTLITERALS)) goto _output_error;
- length += s;
- } while (s==255);
- if ((safeDecode) && unlikely((uptrval)(op)+length<(uptrval)op)) goto _output_error; /* overflow detection */
- }
- length += MINMATCH;
-
- /* check external dictionary */
- if ((dict==usingExtDict) && (match < lowPrefix)) {
- if (unlikely(op+length > oend-LASTLITERALS)) goto _output_error; /* doesn't respect parsing restriction */
-
- if (length <= (size_t)(lowPrefix-match)) {
- /* match can be copied as a single segment from external dictionary */
- memmove(op, dictEnd - (lowPrefix-match), length);
- op += length;
- } else {
- /* match encompass external dictionary and current block */
- size_t const copySize = (size_t)(lowPrefix-match);
- size_t const restSize = length - copySize;
- memcpy(op, dictEnd - copySize, copySize);
- op += copySize;
- if (restSize > (size_t)(op-lowPrefix)) { /* overlap copy */
- BYTE* const endOfMatch = op + restSize;
- const BYTE* copyFrom = lowPrefix;
- while (op < endOfMatch) *op++ = *copyFrom++;
- } else {
- memcpy(op, lowPrefix, restSize);
- op += restSize;
- } }
- continue;
- }
-
- /* copy match within block */
- cpy = op + length;
- if (unlikely(offset<8)) {
- const int dec64 = dec64table[offset];
- op[0] = match[0];
- op[1] = match[1];
- op[2] = match[2];
- op[3] = match[3];
- match += dec32table[offset];
- memcpy(op+4, match, 4);
- match -= dec64;
- } else { LZ4_copy8(op, match); match+=8; }
- op += 8;
-
- if (unlikely(cpy>oend-12)) {
- BYTE* const oCopyLimit = oend-(WILDCOPYLENGTH-1);
- if (cpy > oend-LASTLITERALS) goto _output_error; /* Error : last LASTLITERALS bytes must be literals (uncompressed) */
- if (op < oCopyLimit) {
- LZ4_wildCopy(op, match, oCopyLimit);
- match += oCopyLimit - op;
- op = oCopyLimit;
- }
- while (op<cpy) *op++ = *match++;
- } else {
- LZ4_copy8(op, match);
- if (length>16) LZ4_wildCopy(op+8, match+8, cpy);
- }
- op=cpy; /* correction */
- }
-
- /* end of decoding */
- if (endOnInput)
- return (int) (((char*)op)-dest); /* Nb of output bytes decoded */
- else
- return (int) (((const char*)ip)-source); /* Nb of input bytes read */
-
- /* Overflow error detected */
-_output_error:
- return (int) (-(((const char*)ip)-source))-1;
-}
-
-
-int LZ4_decompress_safe(const char* source, char* dest, int compressedSize, int maxDecompressedSize)
-{
- return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize, endOnInputSize, full, 0, noDict, (BYTE*)dest, NULL, 0);
-}
-
-int LZ4_decompress_safe_partial(const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize)
-{
- return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize, endOnInputSize, partial, targetOutputSize, noDict, (BYTE*)dest, NULL, 0);
-}
-
-int LZ4_decompress_fast(const char* source, char* dest, int originalSize)
-{
- return LZ4_decompress_generic(source, dest, 0, originalSize, endOnOutputSize, full, 0, withPrefix64k, (BYTE*)(dest - 64 KB), NULL, 64 KB);
-}
-
-
-/*===== streaming decompression functions =====*/
-
-/*
- * If you prefer dynamic allocation methods,
- * LZ4_createStreamDecode()
- * provides a pointer (void*) towards an initialized LZ4_streamDecode_t structure.
- */
-LZ4_streamDecode_t* LZ4_createStreamDecode(void)
-{
- LZ4_streamDecode_t* lz4s = (LZ4_streamDecode_t*) ALLOCATOR(1, sizeof(LZ4_streamDecode_t));
- return lz4s;
-}
-
-int LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream)
-{
- FREEMEM(LZ4_stream);
- return 0;
-}
-
-/*!
- * LZ4_setStreamDecode() :
- * Use this function to instruct where to find the dictionary.
- * This function is not necessary if previous data is still available where it was decoded.
- * Loading a size of 0 is allowed (same effect as no dictionary).
- * Return : 1 if OK, 0 if error
- */
-int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize)
-{
- LZ4_streamDecode_t_internal* lz4sd = &LZ4_streamDecode->internal_donotuse;
- lz4sd->prefixSize = (size_t) dictSize;
- lz4sd->prefixEnd = (const BYTE*) dictionary + dictSize;
- lz4sd->externalDict = NULL;
- lz4sd->extDictSize = 0;
- return 1;
-}
-
-/*
-*_continue() :
- These decoding functions allow decompression of multiple blocks in "streaming" mode.
- Previously decoded blocks must still be available at the memory position where they were decoded.
- If it's not possible, save the relevant part of decoded data into a safe buffer,
- and indicate where it stands using LZ4_setStreamDecode()
-*/
-int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxOutputSize)
-{
- LZ4_streamDecode_t_internal* lz4sd = &LZ4_streamDecode->internal_donotuse;
- int result;
-
- if (lz4sd->prefixEnd == (BYTE*)dest) {
- result = LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize,
- endOnInputSize, full, 0,
- usingExtDict, lz4sd->prefixEnd - lz4sd->prefixSize, lz4sd->externalDict, lz4sd->extDictSize);
- if (result <= 0) return result;
- lz4sd->prefixSize += result;
- lz4sd->prefixEnd += result;
- } else {
- lz4sd->extDictSize = lz4sd->prefixSize;
- lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;
- result = LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize,
- endOnInputSize, full, 0,
- usingExtDict, (BYTE*)dest, lz4sd->externalDict, lz4sd->extDictSize);
- if (result <= 0) return result;
- lz4sd->prefixSize = result;
- lz4sd->prefixEnd = (BYTE*)dest + result;
- }
-
- return result;
-}
-
-int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize)
-{
- LZ4_streamDecode_t_internal* lz4sd = &LZ4_streamDecode->internal_donotuse;
- int result;
-
- if (lz4sd->prefixEnd == (BYTE*)dest) {
- result = LZ4_decompress_generic(source, dest, 0, originalSize,
- endOnOutputSize, full, 0,
- usingExtDict, lz4sd->prefixEnd - lz4sd->prefixSize, lz4sd->externalDict, lz4sd->extDictSize);
- if (result <= 0) return result;
- lz4sd->prefixSize += originalSize;
- lz4sd->prefixEnd += originalSize;
- } else {
- lz4sd->extDictSize = lz4sd->prefixSize;
- lz4sd->externalDict = lz4sd->prefixEnd - lz4sd->extDictSize;
- result = LZ4_decompress_generic(source, dest, 0, originalSize,
- endOnOutputSize, full, 0,
- usingExtDict, (BYTE*)dest, lz4sd->externalDict, lz4sd->extDictSize);
- if (result <= 0) return result;
- lz4sd->prefixSize = originalSize;
- lz4sd->prefixEnd = (BYTE*)dest + originalSize;
- }
-
- return result;
-}
-
-
-/*
-Advanced decoding functions :
-*_usingDict() :
- These decoding functions work the same as "_continue" ones,
- the dictionary must be explicitly provided within parameters
-*/
-
-FORCE_INLINE int LZ4_decompress_usingDict_generic(const char* source, char* dest, int compressedSize, int maxOutputSize, int safe, const char* dictStart, int dictSize)
-{
- if (dictSize==0)
- return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize, safe, full, 0, noDict, (BYTE*)dest, NULL, 0);
- if (dictStart+dictSize == dest) {
- if (dictSize >= (int)(64 KB - 1))
- return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize, safe, full, 0, withPrefix64k, (BYTE*)dest-64 KB, NULL, 0);
- return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize, safe, full, 0, noDict, (BYTE*)dest-dictSize, NULL, 0);
- }
- return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize, safe, full, 0, usingExtDict, (BYTE*)dest, (const BYTE*)dictStart, dictSize);
-}
-
-int LZ4_decompress_safe_usingDict(const char* source, char* dest, int compressedSize, int maxOutputSize, const char* dictStart, int dictSize)
-{
- return LZ4_decompress_usingDict_generic(source, dest, compressedSize, maxOutputSize, 1, dictStart, dictSize);
-}
-
-int LZ4_decompress_fast_usingDict(const char* source, char* dest, int originalSize, const char* dictStart, int dictSize)
-{
- return LZ4_decompress_usingDict_generic(source, dest, 0, originalSize, 0, dictStart, dictSize);
-}
-
-/* debug function */
-int LZ4_decompress_safe_forceExtDict(const char* source, char* dest, int compressedSize, int maxOutputSize, const char* dictStart, int dictSize)
-{
- return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize, endOnInputSize, full, 0, usingExtDict, (BYTE*)dest, (const BYTE*)dictStart, dictSize);
-}
-
-
-/*=*************************************************
-* Obsolete Functions
-***************************************************/
-/* obsolete compression functions */
-int LZ4_compress_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize) { return LZ4_compress_default(source, dest, inputSize, maxOutputSize); }
-int LZ4_compress(const char* source, char* dest, int inputSize) { return LZ4_compress_default(source, dest, inputSize, LZ4_compressBound(inputSize)); }
-int LZ4_compress_limitedOutput_withState (void* state, const char* src, char* dst, int srcSize, int dstSize) { return LZ4_compress_fast_extState(state, src, dst, srcSize, dstSize, 1); }
-int LZ4_compress_withState (void* state, const char* src, char* dst, int srcSize) { return LZ4_compress_fast_extState(state, src, dst, srcSize, LZ4_compressBound(srcSize), 1); }
-int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_stream, const char* src, char* dst, int srcSize, int maxDstSize) { return LZ4_compress_fast_continue(LZ4_stream, src, dst, srcSize, maxDstSize, 1); }
-int LZ4_compress_continue (LZ4_stream_t* LZ4_stream, const char* source, char* dest, int inputSize) { return LZ4_compress_fast_continue(LZ4_stream, source, dest, inputSize, LZ4_compressBound(inputSize), 1); }
-
-/*
-These function names are deprecated and should no longer be used.
-They are only provided here for compatibility with older user programs.
-- LZ4_uncompress is totally equivalent to LZ4_decompress_fast
-- LZ4_uncompress_unknownOutputSize is totally equivalent to LZ4_decompress_safe
-*/
-int LZ4_uncompress (const char* source, char* dest, int outputSize) { return LZ4_decompress_fast(source, dest, outputSize); }
-int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize) { return LZ4_decompress_safe(source, dest, isize, maxOutputSize); }
-
-
-/* Obsolete Streaming functions */
-
-int LZ4_sizeofStreamState() { return LZ4_STREAMSIZE; }
-
-static void LZ4_init(LZ4_stream_t* lz4ds, BYTE* base)
-{
- MEM_INIT(lz4ds, 0, sizeof(LZ4_stream_t));
- lz4ds->internal_donotuse.bufferStart = base;
-}
-
-int LZ4_resetStreamState(void* state, char* inputBuffer)
-{
- if ((((uptrval)state) & 3) != 0) return 1; /* Error : pointer is not aligned on 4-bytes boundary */
- LZ4_init((LZ4_stream_t*)state, (BYTE*)inputBuffer);
- return 0;
-}
-
-void* LZ4_create (char* inputBuffer)
-{
- LZ4_stream_t* lz4ds = (LZ4_stream_t*)ALLOCATOR(8, sizeof(LZ4_stream_t));
- LZ4_init (lz4ds, (BYTE*)inputBuffer);
- return lz4ds;
-}
-
-char* LZ4_slideInputBuffer (void* LZ4_Data)
-{
- LZ4_stream_t_internal* ctx = &((LZ4_stream_t*)LZ4_Data)->internal_donotuse;
- int dictSize = LZ4_saveDict((LZ4_stream_t*)LZ4_Data, (char*)ctx->bufferStart, 64 KB);
- return (char*)(ctx->bufferStart + dictSize);
-}
-
-/* Obsolete streaming decompression functions */
-
-int LZ4_decompress_safe_withPrefix64k(const char* source, char* dest, int compressedSize, int maxOutputSize)
-{
- return LZ4_decompress_generic(source, dest, compressedSize, maxOutputSize, endOnInputSize, full, 0, withPrefix64k, (BYTE*)dest - 64 KB, NULL, 64 KB);
-}
-
-int LZ4_decompress_fast_withPrefix64k(const char* source, char* dest, int originalSize)
-{
- return LZ4_decompress_generic(source, dest, 0, originalSize, endOnOutputSize, full, 0, withPrefix64k, (BYTE*)dest - 64 KB, NULL, 64 KB);
-}
-
-#endif /* LZ4_COMMONDEFS_ONLY */
http://git-wip-us.apache.org/repos/asf/nifi-minifi-cpp/blob/7528d23e/thirdparty/librdkafka-0.11.1/src/lz4.h
----------------------------------------------------------------------
diff --git a/thirdparty/librdkafka-0.11.1/src/lz4.h b/thirdparty/librdkafka-0.11.1/src/lz4.h
deleted file mode 100644
index 588de22..0000000
--- a/thirdparty/librdkafka-0.11.1/src/lz4.h
+++ /dev/null
@@ -1,463 +0,0 @@
-/*
- * LZ4 - Fast LZ compression algorithm
- * Header File
- * Copyright (C) 2011-2017, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * 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 COPYRIGHT HOLDERS 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 COPYRIGHT
- OWNER 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.
-
- You can contact the author at :
- - LZ4 homepage : http://www.lz4.org
- - LZ4 source repository : https://github.com/lz4/lz4
-*/
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-#ifndef LZ4_H_2983827168210
-#define LZ4_H_2983827168210
-
-/* --- Dependency --- */
-#include <stddef.h> /* size_t */
-
-
-/**
- Introduction
-
- LZ4 is lossless compression algorithm, providing compression speed at 400 MB/s per core,
- scalable with multi-cores CPU. It features an extremely fast decoder, with speed in
- multiple GB/s per core, typically reaching RAM speed limits on multi-core systems.
-
- The LZ4 compression library provides in-memory compression and decompression functions.
- Compression can be done in:
- - a single step (described as Simple Functions)
- - a single step, reusing a context (described in Advanced Functions)
- - unbounded multiple steps (described as Streaming compression)
-
- lz4.h provides block compression functions. It gives full buffer control to user.
- Decompressing an lz4-compressed block also requires metadata (such as compressed size).
- Each application is free to encode such metadata in whichever way it wants.
-
- An additional format, called LZ4 frame specification (doc/lz4_Frame_format.md),
- take care of encoding standard metadata alongside LZ4-compressed blocks.
- If your application requires interoperability, it's recommended to use it.
- A library is provided to take care of it, see lz4frame.h.
-*/
-
-/*^***************************************************************
-* Export parameters
-*****************************************************************/
-/*
-* LZ4_DLL_EXPORT :
-* Enable exporting of functions when building a Windows DLL
-* LZ4LIB_API :
-* Control library symbols visibility.
-*/
-#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
-# define LZ4LIB_API __declspec(dllexport)
-#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
-# define LZ4LIB_API __declspec(dllimport) /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
-#elif defined(__GNUC__) && (__GNUC__ >= 4)
-# define LZ4LIB_API __attribute__ ((__visibility__ ("default")))
-#else
-# define LZ4LIB_API
-#endif
-
-
-/*------ Version ------*/
-#define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */
-#define LZ4_VERSION_MINOR 7 /* for new (non-breaking) interface capabilities */
-#define LZ4_VERSION_RELEASE 6 /* for tweaks, bug-fixes, or development */
-
-#define LZ4_VERSION_NUMBER (LZ4_VERSION_MAJOR *100*100 + LZ4_VERSION_MINOR *100 + LZ4_VERSION_RELEASE)
-
-#define LZ4_LIB_VERSION LZ4_VERSION_MAJOR.LZ4_VERSION_MINOR.LZ4_VERSION_RELEASE
-#define LZ4_QUOTE(str) #str
-#define LZ4_EXPAND_AND_QUOTE(str) LZ4_QUOTE(str)
-#define LZ4_VERSION_STRING LZ4_EXPAND_AND_QUOTE(LZ4_LIB_VERSION)
-
-LZ4LIB_API int LZ4_versionNumber (void); /**< library version number; to be used when checking dll version */
-LZ4LIB_API const char* LZ4_versionString (void); /**< library version string; to be used when checking dll version */
-
-
-/*-************************************
-* Tuning parameter
-**************************************/
-/*!
- * LZ4_MEMORY_USAGE :
- * Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
- * Increasing memory usage improves compression ratio
- * Reduced memory usage can improve speed, due to cache effect
- * Default value is 14, for 16KB, which nicely fits into Intel x86 L1 cache
- */
-#ifndef LZ4_MEMORY_USAGE
-# define LZ4_MEMORY_USAGE 14
-#endif
-
-/*-************************************
-* Simple Functions
-**************************************/
-/*! LZ4_compress_default() :
- Compresses 'sourceSize' bytes from buffer 'source'
- into already allocated 'dest' buffer of size 'maxDestSize'.
- Compression is guaranteed to succeed if 'maxDestSize' >= LZ4_compressBound(sourceSize).
- It also runs faster, so it's a recommended setting.
- If the function cannot compress 'source' into a more limited 'dest' budget,
- compression stops *immediately*, and the function result is zero.
- As a consequence, 'dest' content is not valid.
- This function never writes outside 'dest' buffer, nor read outside 'source' buffer.
- sourceSize : Max supported value is LZ4_MAX_INPUT_VALUE
- maxDestSize : full or partial size of buffer 'dest' (which must be already allocated)
- return : the number of bytes written into buffer 'dest' (necessarily <= maxOutputSize)
- or 0 if compression fails */
-LZ4LIB_API int LZ4_compress_default(const char* source, char* dest, int sourceSize, int maxDestSize);
-
-/*! LZ4_decompress_safe() :
- compressedSize : is the precise full size of the compressed block.
- maxDecompressedSize : is the size of destination buffer, which must be already allocated.
- return : the number of bytes decompressed into destination buffer (necessarily <= maxDecompressedSize)
- If destination buffer is not large enough, decoding will stop and output an error code (<0).
- If the source stream is detected malformed, the function will stop decoding and return a negative result.
- This function is protected against buffer overflow exploits, including malicious data packets.
- It never writes outside output buffer, nor reads outside input buffer.
-*/
-LZ4LIB_API int LZ4_decompress_safe (const char* source, char* dest, int compressedSize, int maxDecompressedSize);
-
-
-/*-************************************
-* Advanced Functions
-**************************************/
-#define LZ4_MAX_INPUT_SIZE 0x7E000000 /* 2 113 929 216 bytes */
-#define LZ4_COMPRESSBOUND(isize) ((unsigned)(isize) > (unsigned)LZ4_MAX_INPUT_SIZE ? 0 : (isize) + ((isize)/255) + 16)
-
-/*!
-LZ4_compressBound() :
- Provides the maximum size that LZ4 compression may output in a "worst case" scenario (input data not compressible)
- This function is primarily useful for memory allocation purposes (destination buffer size).
- Macro LZ4_COMPRESSBOUND() is also provided for compilation-time evaluation (stack memory allocation for example).
- Note that LZ4_compress_default() compress faster when dest buffer size is >= LZ4_compressBound(srcSize)
- inputSize : max supported value is LZ4_MAX_INPUT_SIZE
- return : maximum output size in a "worst case" scenario
- or 0, if input size is too large ( > LZ4_MAX_INPUT_SIZE)
-*/
-LZ4LIB_API int LZ4_compressBound(int inputSize);
-
-/*!
-LZ4_compress_fast() :
- Same as LZ4_compress_default(), but allows to select an "acceleration" factor.
- The larger the acceleration value, the faster the algorithm, but also the lesser the compression.
- It's a trade-off. It can be fine tuned, with each successive value providing roughly +~3% to speed.
- An acceleration value of "1" is the same as regular LZ4_compress_default()
- Values <= 0 will be replaced by ACCELERATION_DEFAULT (see lz4.c), which is 1.
-*/
-LZ4LIB_API int LZ4_compress_fast (const char* source, char* dest, int sourceSize, int maxDestSize, int acceleration);
-
-
-/*!
-LZ4_compress_fast_extState() :
- Same compression function, just using an externally allocated memory space to store compression state.
- Use LZ4_sizeofState() to know how much memory must be allocated,
- and allocate it on 8-bytes boundaries (using malloc() typically).
- Then, provide it as 'void* state' to compression function.
-*/
-LZ4LIB_API int LZ4_sizeofState(void);
-LZ4LIB_API int LZ4_compress_fast_extState (void* state, const char* source, char* dest, int inputSize, int maxDestSize, int acceleration);
-
-
-/*!
-LZ4_compress_destSize() :
- Reverse the logic, by compressing as much data as possible from 'source' buffer
- into already allocated buffer 'dest' of size 'targetDestSize'.
- This function either compresses the entire 'source' content into 'dest' if it's large enough,
- or fill 'dest' buffer completely with as much data as possible from 'source'.
- *sourceSizePtr : will be modified to indicate how many bytes where read from 'source' to fill 'dest'.
- New value is necessarily <= old value.
- return : Nb bytes written into 'dest' (necessarily <= targetDestSize)
- or 0 if compression fails
-*/
-LZ4LIB_API int LZ4_compress_destSize (const char* source, char* dest, int* sourceSizePtr, int targetDestSize);
-
-
-/*!
-LZ4_decompress_fast() :
- originalSize : is the original and therefore uncompressed size
- return : the number of bytes read from the source buffer (in other words, the compressed size)
- If the source stream is detected malformed, the function will stop decoding and return a negative result.
- Destination buffer must be already allocated. Its size must be a minimum of 'originalSize' bytes.
- note : This function fully respect memory boundaries for properly formed compressed data.
- It is a bit faster than LZ4_decompress_safe().
- However, it does not provide any protection against intentionally modified data stream (malicious input).
- Use this function in trusted environment only (data to decode comes from a trusted source).
-*/
-LZ4LIB_API int LZ4_decompress_fast (const char* source, char* dest, int originalSize);
-
-/*!
-LZ4_decompress_safe_partial() :
- This function decompress a compressed block of size 'compressedSize' at position 'source'
- into destination buffer 'dest' of size 'maxDecompressedSize'.
- The function tries to stop decompressing operation as soon as 'targetOutputSize' has been reached,
- reducing decompression time.
- return : the number of bytes decoded in the destination buffer (necessarily <= maxDecompressedSize)
- Note : this number can be < 'targetOutputSize' should the compressed block to decode be smaller.
- Always control how many bytes were decoded.
- If the source stream is detected malformed, the function will stop decoding and return a negative result.
- This function never writes outside of output buffer, and never reads outside of input buffer. It is therefore protected against malicious data packets
-*/
-LZ4LIB_API int LZ4_decompress_safe_partial (const char* source, char* dest, int compressedSize, int targetOutputSize, int maxDecompressedSize);
-
-
-/*-*********************************************
-* Streaming Compression Functions
-***********************************************/
-typedef union LZ4_stream_u LZ4_stream_t; /* incomplete type (defined later) */
-
-/*! LZ4_createStream() and LZ4_freeStream() :
- * LZ4_createStream() will allocate and initialize an `LZ4_stream_t` structure.
- * LZ4_freeStream() releases its memory.
- */
-LZ4LIB_API LZ4_stream_t* LZ4_createStream(void);
-LZ4LIB_API int LZ4_freeStream (LZ4_stream_t* streamPtr);
-
-/*! LZ4_resetStream() :
- * An LZ4_stream_t structure can be allocated once and re-used multiple times.
- * Use this function to init an allocated `LZ4_stream_t` structure and start a new compression.
- */
-LZ4LIB_API void LZ4_resetStream (LZ4_stream_t* streamPtr);
-
-/*! LZ4_loadDict() :
- * Use this function to load a static dictionary into LZ4_stream.
- * Any previous data will be forgotten, only 'dictionary' will remain in memory.
- * Loading a size of 0 is allowed.
- * Return : dictionary size, in bytes (necessarily <= 64 KB)
- */
-LZ4LIB_API int LZ4_loadDict (LZ4_stream_t* streamPtr, const char* dictionary, int dictSize);
-
-/*! LZ4_compress_fast_continue() :
- * Compress buffer content 'src', using data from previously compressed blocks as dictionary to improve compression ratio.
- * Important : Previous data blocks are assumed to still be present and unmodified !
- * 'dst' buffer must be already allocated.
- * If maxDstSize >= LZ4_compressBound(srcSize), compression is guaranteed to succeed, and runs faster.
- * If not, and if compressed data cannot fit into 'dst' buffer size, compression stops, and function returns a zero.
- */
-LZ4LIB_API int LZ4_compress_fast_continue (LZ4_stream_t* streamPtr, const char* src, char* dst, int srcSize, int maxDstSize, int acceleration);
-
-/*! LZ4_saveDict() :
- * If previously compressed data block is not guaranteed to remain available at its memory location,
- * save it into a safer place (char* safeBuffer).
- * Note : you don't need to call LZ4_loadDict() afterwards,
- * dictionary is immediately usable, you can therefore call LZ4_compress_fast_continue().
- * Return : saved dictionary size in bytes (necessarily <= dictSize), or 0 if error.
- */
-LZ4LIB_API int LZ4_saveDict (LZ4_stream_t* streamPtr, char* safeBuffer, int dictSize);
-
-
-/*-**********************************************
-* Streaming Decompression Functions
-* Bufferless synchronous API
-************************************************/
-typedef union LZ4_streamDecode_u LZ4_streamDecode_t; /* incomplete type (defined later) */
-
-/*! LZ4_createStreamDecode() and LZ4_freeStreamDecode() :
- * creation / destruction of streaming decompression tracking structure */
-LZ4LIB_API LZ4_streamDecode_t* LZ4_createStreamDecode(void);
-LZ4LIB_API int LZ4_freeStreamDecode (LZ4_streamDecode_t* LZ4_stream);
-
-/*! LZ4_setStreamDecode() :
- * Use this function to instruct where to find the dictionary.
- * Setting a size of 0 is allowed (same effect as reset).
- * @return : 1 if OK, 0 if error
- */
-LZ4LIB_API int LZ4_setStreamDecode (LZ4_streamDecode_t* LZ4_streamDecode, const char* dictionary, int dictSize);
-
-/*!
-LZ4_decompress_*_continue() :
- These decoding functions allow decompression of multiple blocks in "streaming" mode.
- Previously decoded blocks *must* remain available at the memory position where they were decoded (up to 64 KB)
- In the case of a ring buffers, decoding buffer must be either :
- - Exactly same size as encoding buffer, with same update rule (block boundaries at same positions)
- In which case, the decoding & encoding ring buffer can have any size, including very small ones ( < 64 KB).
- - Larger than encoding buffer, by a minimum of maxBlockSize more bytes.
- maxBlockSize is implementation dependent. It's the maximum size you intend to compress into a single block.
- In which case, encoding and decoding buffers do not need to be synchronized,
- and encoding ring buffer can have any size, including small ones ( < 64 KB).
- - _At least_ 64 KB + 8 bytes + maxBlockSize.
- In which case, encoding and decoding buffers do not need to be synchronized,
- and encoding ring buffer can have any size, including larger than decoding buffer.
- Whenever these conditions are not possible, save the last 64KB of decoded data into a safe buffer,
- and indicate where it is saved using LZ4_setStreamDecode()
-*/
-LZ4LIB_API int LZ4_decompress_safe_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int compressedSize, int maxDecompressedSize);
-LZ4LIB_API int LZ4_decompress_fast_continue (LZ4_streamDecode_t* LZ4_streamDecode, const char* source, char* dest, int originalSize);
-
-
-/*! LZ4_decompress_*_usingDict() :
- * These decoding functions work the same as
- * a combination of LZ4_setStreamDecode() followed by LZ4_decompress_*_continue()
- * They are stand-alone, and don't need an LZ4_streamDecode_t structure.
- */
-LZ4LIB_API int LZ4_decompress_safe_usingDict (const char* source, char* dest, int compressedSize, int maxDecompressedSize, const char* dictStart, int dictSize);
-LZ4LIB_API int LZ4_decompress_fast_usingDict (const char* source, char* dest, int originalSize, const char* dictStart, int dictSize);
-
-
-/*^**********************************************
- * !!!!!! STATIC LINKING ONLY !!!!!!
- ***********************************************/
-/*-************************************
- * Private definitions
- **************************************
- * Do not use these definitions.
- * They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
- * Using these definitions will expose code to API and/or ABI break in future versions of the library.
- **************************************/
-#define LZ4_HASHLOG (LZ4_MEMORY_USAGE-2)
-#define LZ4_HASHTABLESIZE (1 << LZ4_MEMORY_USAGE)
-#define LZ4_HASH_SIZE_U32 (1 << LZ4_HASHLOG) /* required as macro for static allocation */
-
-#if defined(__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-#include <stdint.h>
-
-typedef struct {
- uint32_t hashTable[LZ4_HASH_SIZE_U32];
- uint32_t currentOffset;
- uint32_t initCheck;
- const uint8_t* dictionary;
- uint8_t* bufferStart; /* obsolete, used for slideInputBuffer */
- uint32_t dictSize;
-} LZ4_stream_t_internal;
-
-typedef struct {
- const uint8_t* externalDict;
- size_t extDictSize;
- const uint8_t* prefixEnd;
- size_t prefixSize;
-} LZ4_streamDecode_t_internal;
-
-#else
-
-typedef struct {
- unsigned int hashTable[LZ4_HASH_SIZE_U32];
- unsigned int currentOffset;
- unsigned int initCheck;
- const unsigned char* dictionary;
- unsigned char* bufferStart; /* obsolete, used for slideInputBuffer */
- unsigned int dictSize;
-} LZ4_stream_t_internal;
-
-typedef struct {
- const unsigned char* externalDict;
- size_t extDictSize;
- const unsigned char* prefixEnd;
- size_t prefixSize;
-} LZ4_streamDecode_t_internal;
-
-#endif
-
-/*!
- * LZ4_stream_t :
- * information structure to track an LZ4 stream.
- * init this structure before first use.
- * note : only use in association with static linking !
- * this definition is not API/ABI safe,
- * and may change in a future version !
- */
-#define LZ4_STREAMSIZE_U64 ((1 << (LZ4_MEMORY_USAGE-3)) + 4)
-#define LZ4_STREAMSIZE (LZ4_STREAMSIZE_U64 * sizeof(unsigned long long))
-union LZ4_stream_u {
- unsigned long long table[LZ4_STREAMSIZE_U64];
- LZ4_stream_t_internal internal_donotuse;
-} ; /* previously typedef'd to LZ4_stream_t */
-
-
-/*!
- * LZ4_streamDecode_t :
- * information structure to track an LZ4 stream during decompression.
- * init this structure using LZ4_setStreamDecode (or memset()) before first use
- * note : only use in association with static linking !
- * this definition is not API/ABI safe,
- * and may change in a future version !
- */
-#define LZ4_STREAMDECODESIZE_U64 4
-#define LZ4_STREAMDECODESIZE (LZ4_STREAMDECODESIZE_U64 * sizeof(unsigned long long))
-union LZ4_streamDecode_u {
- unsigned long long table[LZ4_STREAMDECODESIZE_U64];
- LZ4_streamDecode_t_internal internal_donotuse;
-} ; /* previously typedef'd to LZ4_streamDecode_t */
-
-
-/*-************************************
-* Obsolete Functions
-**************************************/
-
-/*! Deprecation warnings
- Should deprecation warnings be a problem,
- it is generally possible to disable them,
- typically with -Wno-deprecated-declarations for gcc
- or _CRT_SECURE_NO_WARNINGS in Visual.
- Otherwise, it's also possible to define LZ4_DISABLE_DEPRECATE_WARNINGS */
-#ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
-# define LZ4_DEPRECATED(message) /* disable deprecation warnings */
-#else
-# define LZ4_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-# if defined (__cplusplus) && (__cplusplus >= 201402) /* C++14 or greater */
-# define LZ4_DEPRECATED(message) [[deprecated(message)]]
-# elif (LZ4_GCC_VERSION >= 405) || defined(__clang__)
-# define LZ4_DEPRECATED(message) __attribute__((deprecated(message)))
-# elif (LZ4_GCC_VERSION >= 301)
-# define LZ4_DEPRECATED(message) __attribute__((deprecated))
-# elif defined(_MSC_VER)
-# define LZ4_DEPRECATED(message) __declspec(deprecated(message))
-# else
-# pragma message("WARNING: You need to implement LZ4_DEPRECATED for this compiler")
-# define LZ4_DEPRECATED(message)
-# endif
-#endif /* LZ4_DISABLE_DEPRECATE_WARNINGS */
-
-/* Obsolete compression functions */
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress (const char* source, char* dest, int sourceSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_default() instead") int LZ4_compress_limitedOutput (const char* source, char* dest, int sourceSize, int maxOutputSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_withState (void* state, const char* source, char* dest, int inputSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_extState() instead") int LZ4_compress_limitedOutput_withState (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_compress_fast_continue() instead") int LZ4_compress_limitedOutput_continue (LZ4_stream_t* LZ4_streamPtr, const char* source, char* dest, int inputSize, int maxOutputSize);
-
-/* Obsolete decompression functions */
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast() instead") int LZ4_uncompress (const char* source, char* dest, int outputSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe() instead") int LZ4_uncompress_unknownOutputSize (const char* source, char* dest, int isize, int maxOutputSize);
-
-/* Obsolete streaming functions; use new streaming interface whenever possible */
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") void* LZ4_create (char* inputBuffer);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_createStream() instead") int LZ4_sizeofStreamState(void);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_resetStream() instead") int LZ4_resetStreamState(void* state, char* inputBuffer);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_saveDict() instead") char* LZ4_slideInputBuffer (void* state);
-
-/* Obsolete streaming decoding functions */
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_safe_usingDict() instead") int LZ4_decompress_safe_withPrefix64k (const char* src, char* dst, int compressedSize, int maxDstSize);
-LZ4LIB_API LZ4_DEPRECATED("use LZ4_decompress_fast_usingDict() instead") int LZ4_decompress_fast_withPrefix64k (const char* src, char* dst, int originalSize);
-
-#endif /* LZ4_H_2983827168210 */
-
-#if defined (__cplusplus)
-}
-#endif