3635 lines
132 KiB
C
3635 lines
132 KiB
C
/*
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* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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/******************************************
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* Includes
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******************************************/
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#include <stddef.h> /* size_t, ptrdiff_t */
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#include <string.h> /* memcpy */
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#include "zstd_v04.h"
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#include "error_private.h"
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/* ******************************************************************
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* mem.h
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*******************************************************************/
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#ifndef MEM_H_MODULE
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#define MEM_H_MODULE
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/******************************************
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* Compiler-specific
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******************************************/
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#if defined(_MSC_VER) /* Visual Studio */
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# include <stdlib.h> /* _byteswap_ulong */
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# include <intrin.h> /* _byteswap_* */
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#endif
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#if defined(__GNUC__)
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# define MEM_STATIC static __attribute__((unused))
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#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
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# define MEM_STATIC static inline
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#elif defined(_MSC_VER)
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# define MEM_STATIC static __inline
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#else
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# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
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#endif
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/****************************************************************
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* Basic Types
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*****************************************************************/
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#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
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# include <stdint.h>
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typedef uint8_t BYTE;
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typedef uint16_t U16;
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typedef int16_t S16;
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typedef uint32_t U32;
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typedef int32_t S32;
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typedef uint64_t U64;
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typedef int64_t S64;
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#else
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typedef unsigned char BYTE;
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typedef unsigned short U16;
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typedef signed short S16;
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typedef unsigned int U32;
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typedef signed int S32;
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typedef unsigned long long U64;
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typedef signed long long S64;
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#endif
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/*-*************************************
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* Debug
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***************************************/
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#include "debug.h"
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#ifndef assert
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# define assert(condition) ((void)0)
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#endif
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/****************************************************************
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* Memory I/O
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*****************************************************************/
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/* MEM_FORCE_MEMORY_ACCESS
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* By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
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* Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
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* The below switch allow to select different access method for improved performance.
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* Method 0 (default) : use `memcpy()`. Safe and portable.
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* Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable).
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* This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
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* Method 2 : direct access. This method is portable but violate C standard.
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* It can generate buggy code on targets generating assembly depending on alignment.
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* But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6)
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* See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details.
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* Prefer these methods in priority order (0 > 1 > 2)
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*/
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#ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
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# 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__) )
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# define MEM_FORCE_MEMORY_ACCESS 2
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# elif (defined(__INTEL_COMPILER) && !defined(WIN32)) || \
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(defined(__GNUC__) && ( defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) ))
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# define MEM_FORCE_MEMORY_ACCESS 1
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# endif
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#endif
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MEM_STATIC unsigned MEM_32bits(void) { return sizeof(void*)==4; }
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MEM_STATIC unsigned MEM_64bits(void) { return sizeof(void*)==8; }
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MEM_STATIC unsigned MEM_isLittleEndian(void)
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{
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const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */
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return one.c[0];
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}
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#if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2)
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/* violates C standard on structure alignment.
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Only use if no other choice to achieve best performance on target platform */
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MEM_STATIC U16 MEM_read16(const void* memPtr) { return *(const U16*) memPtr; }
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MEM_STATIC U32 MEM_read32(const void* memPtr) { return *(const U32*) memPtr; }
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MEM_STATIC U64 MEM_read64(const void* memPtr) { return *(const U64*) memPtr; }
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MEM_STATIC void MEM_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
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#elif defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==1)
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/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
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/* currently only defined for gcc and icc */
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typedef union { U16 u16; U32 u32; U64 u64; } __attribute__((packed)) unalign;
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MEM_STATIC U16 MEM_read16(const void* ptr) { return ((const unalign*)ptr)->u16; }
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MEM_STATIC U32 MEM_read32(const void* ptr) { return ((const unalign*)ptr)->u32; }
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MEM_STATIC U64 MEM_read64(const void* ptr) { return ((const unalign*)ptr)->u64; }
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MEM_STATIC void MEM_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; }
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#else
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/* default method, safe and standard.
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can sometimes prove slower */
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MEM_STATIC U16 MEM_read16(const void* memPtr)
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{
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U16 val; memcpy(&val, memPtr, sizeof(val)); return val;
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}
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MEM_STATIC U32 MEM_read32(const void* memPtr)
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{
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U32 val; memcpy(&val, memPtr, sizeof(val)); return val;
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}
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MEM_STATIC U64 MEM_read64(const void* memPtr)
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{
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U64 val; memcpy(&val, memPtr, sizeof(val)); return val;
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}
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MEM_STATIC void MEM_write16(void* memPtr, U16 value)
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{
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memcpy(memPtr, &value, sizeof(value));
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}
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#endif // MEM_FORCE_MEMORY_ACCESS
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MEM_STATIC U16 MEM_readLE16(const void* memPtr)
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{
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if (MEM_isLittleEndian())
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return MEM_read16(memPtr);
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else
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{
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const BYTE* p = (const BYTE*)memPtr;
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return (U16)(p[0] + (p[1]<<8));
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}
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}
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MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val)
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{
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if (MEM_isLittleEndian())
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{
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MEM_write16(memPtr, val);
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}
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else
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{
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BYTE* p = (BYTE*)memPtr;
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p[0] = (BYTE)val;
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p[1] = (BYTE)(val>>8);
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}
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}
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MEM_STATIC U32 MEM_readLE32(const void* memPtr)
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{
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if (MEM_isLittleEndian())
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return MEM_read32(memPtr);
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else
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{
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const BYTE* p = (const BYTE*)memPtr;
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return (U32)((U32)p[0] + ((U32)p[1]<<8) + ((U32)p[2]<<16) + ((U32)p[3]<<24));
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}
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}
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MEM_STATIC U64 MEM_readLE64(const void* memPtr)
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{
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if (MEM_isLittleEndian())
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return MEM_read64(memPtr);
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else
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{
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const BYTE* p = (const BYTE*)memPtr;
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return (U64)((U64)p[0] + ((U64)p[1]<<8) + ((U64)p[2]<<16) + ((U64)p[3]<<24)
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+ ((U64)p[4]<<32) + ((U64)p[5]<<40) + ((U64)p[6]<<48) + ((U64)p[7]<<56));
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}
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}
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MEM_STATIC size_t MEM_readLEST(const void* memPtr)
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{
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if (MEM_32bits())
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return (size_t)MEM_readLE32(memPtr);
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else
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return (size_t)MEM_readLE64(memPtr);
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}
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#if defined (__cplusplus)
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}
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#endif
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#endif /* MEM_H_MODULE */
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/*
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zstd - standard compression library
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Header File for static linking only
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*/
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#ifndef ZSTD_STATIC_H
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#define ZSTD_STATIC_H
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/* *************************************
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* Types
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***************************************/
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#define ZSTD_WINDOWLOG_ABSOLUTEMIN 11
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/** from faster to stronger */
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typedef enum { ZSTD_fast, ZSTD_greedy, ZSTD_lazy, ZSTD_lazy2, ZSTD_btlazy2 } ZSTD_strategy;
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typedef struct
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{
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U64 srcSize; /* optional : tells how much bytes are present in the frame. Use 0 if not known. */
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U32 windowLog; /* largest match distance : larger == more compression, more memory needed during decompression */
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U32 contentLog; /* full search segment : larger == more compression, slower, more memory (useless for fast) */
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U32 hashLog; /* dispatch table : larger == more memory, faster */
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U32 searchLog; /* nb of searches : larger == more compression, slower */
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U32 searchLength; /* size of matches : larger == faster decompression, sometimes less compression */
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ZSTD_strategy strategy;
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} ZSTD_parameters;
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typedef ZSTDv04_Dctx ZSTD_DCtx;
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/* *************************************
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* Advanced functions
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***************************************/
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/** ZSTD_decompress_usingDict
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* Same as ZSTD_decompressDCtx, using a Dictionary content as prefix
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* Note : dict can be NULL, in which case, it's equivalent to ZSTD_decompressDCtx() */
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static size_t ZSTD_decompress_usingDict(ZSTD_DCtx* ctx,
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void* dst, size_t maxDstSize,
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const void* src, size_t srcSize,
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const void* dict,size_t dictSize);
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/* **************************************
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* Streaming functions (direct mode)
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****************************************/
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static size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx);
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static size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize);
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static void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
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static size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx);
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static size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
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/**
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Streaming decompression, bufferless mode
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A ZSTD_DCtx object is required to track streaming operations.
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Use ZSTD_createDCtx() / ZSTD_freeDCtx() to manage it.
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A ZSTD_DCtx object can be re-used multiple times. Use ZSTD_resetDCtx() to return to fresh status.
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First operation is to retrieve frame parameters, using ZSTD_getFrameParams().
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This function doesn't consume its input. It needs enough input data to properly decode the frame header.
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Objective is to retrieve *params.windowlog, to know minimum amount of memory required during decoding.
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Result : 0 when successful, it means the ZSTD_parameters structure has been filled.
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>0 : means there is not enough data into src. Provides the expected size to successfully decode header.
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errorCode, which can be tested using ZSTD_isError() (For example, if it's not a ZSTD header)
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Then, you can optionally insert a dictionary.
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This operation must mimic the compressor behavior, otherwise decompression will fail or be corrupted.
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Then it's possible to start decompression.
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Use ZSTD_nextSrcSizeToDecompress() and ZSTD_decompressContinue() alternatively.
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ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue().
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ZSTD_decompressContinue() requires this exact amount of bytes, or it will fail.
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ZSTD_decompressContinue() needs previous data blocks during decompression, up to (1 << windowlog).
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They should preferably be located contiguously, prior to current block. Alternatively, a round buffer is also possible.
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@result of ZSTD_decompressContinue() is the number of bytes regenerated within 'dst'.
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It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header.
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A frame is fully decoded when ZSTD_nextSrcSizeToDecompress() returns zero.
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Context can then be reset to start a new decompression.
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*/
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#endif /* ZSTD_STATIC_H */
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/*
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zstd_internal - common functions to include
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Header File for include
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*/
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#ifndef ZSTD_CCOMMON_H_MODULE
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#define ZSTD_CCOMMON_H_MODULE
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/* *************************************
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* Common macros
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***************************************/
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#define MIN(a,b) ((a)<(b) ? (a) : (b))
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#define MAX(a,b) ((a)>(b) ? (a) : (b))
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/* *************************************
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* Common constants
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***************************************/
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#define ZSTD_MAGICNUMBER 0xFD2FB524 /* v0.4 */
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#define KB *(1 <<10)
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#define MB *(1 <<20)
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#define GB *(1U<<30)
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#define BLOCKSIZE (128 KB) /* define, for static allocation */
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static const size_t ZSTD_blockHeaderSize = 3;
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static const size_t ZSTD_frameHeaderSize_min = 5;
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#define ZSTD_frameHeaderSize_max 5 /* define, for static allocation */
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#define BIT7 128
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#define BIT6 64
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#define BIT5 32
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#define BIT4 16
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#define BIT1 2
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#define BIT0 1
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#define IS_RAW BIT0
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#define IS_RLE BIT1
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#define MINMATCH 4
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#define REPCODE_STARTVALUE 4
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#define MLbits 7
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#define LLbits 6
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#define Offbits 5
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#define MaxML ((1<<MLbits) - 1)
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#define MaxLL ((1<<LLbits) - 1)
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#define MaxOff ((1<<Offbits)- 1)
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#define MLFSELog 10
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#define LLFSELog 10
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#define OffFSELog 9
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#define MaxSeq MAX(MaxLL, MaxML)
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#define MIN_SEQUENCES_SIZE (2 /*seqNb*/ + 2 /*dumps*/ + 3 /*seqTables*/ + 1 /*bitStream*/)
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#define MIN_CBLOCK_SIZE (3 /*litCSize*/ + MIN_SEQUENCES_SIZE)
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#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
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typedef enum { bt_compressed, bt_raw, bt_rle, bt_end } blockType_t;
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/* ******************************************
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* Shared functions to include for inlining
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********************************************/
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static void ZSTD_copy8(void* dst, const void* src) { memcpy(dst, src, 8); }
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#define COPY8(d,s) { ZSTD_copy8(d,s); d+=8; s+=8; }
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/*! ZSTD_wildcopy : custom version of memcpy(), can copy up to 7-8 bytes too many */
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static void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length)
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{
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const BYTE* ip = (const BYTE*)src;
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BYTE* op = (BYTE*)dst;
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BYTE* const oend = op + length;
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do
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COPY8(op, ip)
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while (op < oend);
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}
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/* ******************************************************************
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FSE : Finite State Entropy coder
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header file
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****************************************************************** */
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#ifndef FSE_H
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#define FSE_H
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/* *****************************************
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* Includes
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******************************************/
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#include <stddef.h> /* size_t, ptrdiff_t */
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/* *****************************************
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* FSE simple functions
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******************************************/
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static size_t FSE_decompress(void* dst, size_t maxDstSize,
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const void* cSrc, size_t cSrcSize);
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/*!
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FSE_decompress():
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Decompress FSE data from buffer 'cSrc', of size 'cSrcSize',
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into already allocated destination buffer 'dst', of size 'maxDstSize'.
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return : size of regenerated data (<= maxDstSize)
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or an error code, which can be tested using FSE_isError()
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** Important ** : FSE_decompress() doesn't decompress non-compressible nor RLE data !!!
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Why ? : making this distinction requires a header.
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Header management is intentionally delegated to the user layer, which can better manage special cases.
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*/
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/* *****************************************
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* Tool functions
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******************************************/
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/* Error Management */
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static unsigned FSE_isError(size_t code); /* tells if a return value is an error code */
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/* *****************************************
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* FSE detailed API
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******************************************/
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/*!
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FSE_compress() does the following:
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1. count symbol occurrence from source[] into table count[]
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2. normalize counters so that sum(count[]) == Power_of_2 (2^tableLog)
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3. save normalized counters to memory buffer using writeNCount()
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4. build encoding table 'CTable' from normalized counters
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5. encode the data stream using encoding table 'CTable'
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FSE_decompress() does the following:
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1. read normalized counters with readNCount()
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2. build decoding table 'DTable' from normalized counters
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3. decode the data stream using decoding table 'DTable'
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The following API allows targeting specific sub-functions for advanced tasks.
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For example, it's possible to compress several blocks using the same 'CTable',
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or to save and provide normalized distribution using external method.
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*/
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/* *** DECOMPRESSION *** */
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/*!
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FSE_readNCount():
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Read compactly saved 'normalizedCounter' from 'rBuffer'.
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return : size read from 'rBuffer'
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or an errorCode, which can be tested using FSE_isError()
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maxSymbolValuePtr[0] and tableLogPtr[0] will also be updated with their respective values */
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static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSymbolValuePtr, unsigned* tableLogPtr, const void* rBuffer, size_t rBuffSize);
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/*!
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Constructor and Destructor of type FSE_DTable
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Note that its size depends on 'tableLog' */
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typedef unsigned FSE_DTable; /* don't allocate that. It's just a way to be more restrictive than void* */
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/*!
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FSE_buildDTable():
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Builds 'dt', which must be already allocated, using FSE_createDTable()
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return : 0,
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or an errorCode, which can be tested using FSE_isError() */
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static size_t FSE_buildDTable ( FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog);
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/*!
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FSE_decompress_usingDTable():
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Decompress compressed source 'cSrc' of size 'cSrcSize' using 'dt'
|
|
into 'dst' which must be already allocated.
|
|
return : size of regenerated data (necessarily <= maxDstSize)
|
|
or an errorCode, which can be tested using FSE_isError() */
|
|
static size_t FSE_decompress_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const FSE_DTable* dt);
|
|
|
|
/*!
|
|
Tutorial :
|
|
----------
|
|
(Note : these functions only decompress FSE-compressed blocks.
|
|
If block is uncompressed, use memcpy() instead
|
|
If block is a single repeated byte, use memset() instead )
|
|
|
|
The first step is to obtain the normalized frequencies of symbols.
|
|
This can be performed by FSE_readNCount() if it was saved using FSE_writeNCount().
|
|
'normalizedCounter' must be already allocated, and have at least 'maxSymbolValuePtr[0]+1' cells of signed short.
|
|
In practice, that means it's necessary to know 'maxSymbolValue' beforehand,
|
|
or size the table to handle worst case situations (typically 256).
|
|
FSE_readNCount() will provide 'tableLog' and 'maxSymbolValue'.
|
|
The result of FSE_readNCount() is the number of bytes read from 'rBuffer'.
|
|
Note that 'rBufferSize' must be at least 4 bytes, even if useful information is less than that.
|
|
If there is an error, the function will return an error code, which can be tested using FSE_isError().
|
|
|
|
The next step is to build the decompression tables 'FSE_DTable' from 'normalizedCounter'.
|
|
This is performed by the function FSE_buildDTable().
|
|
The space required by 'FSE_DTable' must be already allocated using FSE_createDTable().
|
|
If there is an error, the function will return an error code, which can be tested using FSE_isError().
|
|
|
|
'FSE_DTable' can then be used to decompress 'cSrc', with FSE_decompress_usingDTable().
|
|
'cSrcSize' must be strictly correct, otherwise decompression will fail.
|
|
FSE_decompress_usingDTable() result will tell how many bytes were regenerated (<=maxDstSize).
|
|
If there is an error, the function will return an error code, which can be tested using FSE_isError(). (ex: dst buffer too small)
|
|
*/
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* FSE_H */
|
|
|
|
|
|
/* ******************************************************************
|
|
bitstream
|
|
Part of NewGen Entropy library
|
|
header file (to include)
|
|
Copyright (C) 2013-2015, 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 :
|
|
- Source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
- Public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
****************************************************************** */
|
|
#ifndef BITSTREAM_H_MODULE
|
|
#define BITSTREAM_H_MODULE
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/*
|
|
* This API consists of small unitary functions, which highly benefit from being inlined.
|
|
* Since link-time-optimization is not available for all compilers,
|
|
* these functions are defined into a .h to be included.
|
|
*/
|
|
|
|
/**********************************************
|
|
* bitStream decompression API (read backward)
|
|
**********************************************/
|
|
typedef struct
|
|
{
|
|
size_t bitContainer;
|
|
unsigned bitsConsumed;
|
|
const char* ptr;
|
|
const char* start;
|
|
} BIT_DStream_t;
|
|
|
|
typedef enum { BIT_DStream_unfinished = 0,
|
|
BIT_DStream_endOfBuffer = 1,
|
|
BIT_DStream_completed = 2,
|
|
BIT_DStream_overflow = 3 } BIT_DStream_status; /* result of BIT_reloadDStream() */
|
|
/* 1,2,4,8 would be better for bitmap combinations, but slows down performance a bit ... :( */
|
|
|
|
MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize);
|
|
MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits);
|
|
MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD);
|
|
MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* bitD);
|
|
|
|
|
|
|
|
|
|
/******************************************
|
|
* unsafe API
|
|
******************************************/
|
|
MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, unsigned nbBits);
|
|
/* faster, but works only if nbBits >= 1 */
|
|
|
|
|
|
|
|
/****************************************************************
|
|
* Helper functions
|
|
****************************************************************/
|
|
MEM_STATIC unsigned BIT_highbit32 (U32 val)
|
|
{
|
|
# if defined(_MSC_VER) /* Visual */
|
|
unsigned long r=0;
|
|
_BitScanReverse ( &r, val );
|
|
return (unsigned) r;
|
|
# elif defined(__GNUC__) && (__GNUC__ >= 3) /* Use GCC Intrinsic */
|
|
return 31 - __builtin_clz (val);
|
|
# else /* Software version */
|
|
static const unsigned DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 };
|
|
U32 v = val;
|
|
unsigned r;
|
|
v |= v >> 1;
|
|
v |= v >> 2;
|
|
v |= v >> 4;
|
|
v |= v >> 8;
|
|
v |= v >> 16;
|
|
r = DeBruijnClz[ (U32) (v * 0x07C4ACDDU) >> 27];
|
|
return r;
|
|
# endif
|
|
}
|
|
|
|
|
|
/**********************************************************
|
|
* bitStream decoding
|
|
**********************************************************/
|
|
|
|
/*!BIT_initDStream
|
|
* Initialize a BIT_DStream_t.
|
|
* @bitD : a pointer to an already allocated BIT_DStream_t structure
|
|
* @srcBuffer must point at the beginning of a bitStream
|
|
* @srcSize must be the exact size of the bitStream
|
|
* @result : size of stream (== srcSize) or an errorCode if a problem is detected
|
|
*/
|
|
MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize)
|
|
{
|
|
if (srcSize < 1) { memset(bitD, 0, sizeof(*bitD)); return ERROR(srcSize_wrong); }
|
|
|
|
if (srcSize >= sizeof(size_t)) /* normal case */
|
|
{
|
|
U32 contain32;
|
|
bitD->start = (const char*)srcBuffer;
|
|
bitD->ptr = (const char*)srcBuffer + srcSize - sizeof(size_t);
|
|
bitD->bitContainer = MEM_readLEST(bitD->ptr);
|
|
contain32 = ((const BYTE*)srcBuffer)[srcSize-1];
|
|
if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */
|
|
bitD->bitsConsumed = 8 - BIT_highbit32(contain32);
|
|
}
|
|
else
|
|
{
|
|
U32 contain32;
|
|
bitD->start = (const char*)srcBuffer;
|
|
bitD->ptr = bitD->start;
|
|
bitD->bitContainer = *(const BYTE*)(bitD->start);
|
|
switch(srcSize)
|
|
{
|
|
case 7: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[6]) << (sizeof(size_t)*8 - 16);/* fall-through */
|
|
case 6: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[5]) << (sizeof(size_t)*8 - 24);/* fall-through */
|
|
case 5: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[4]) << (sizeof(size_t)*8 - 32);/* fall-through */
|
|
case 4: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[3]) << 24; /* fall-through */
|
|
case 3: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[2]) << 16; /* fall-through */
|
|
case 2: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[1]) << 8; /* fall-through */
|
|
default: break;
|
|
}
|
|
contain32 = ((const BYTE*)srcBuffer)[srcSize-1];
|
|
if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */
|
|
bitD->bitsConsumed = 8 - BIT_highbit32(contain32);
|
|
bitD->bitsConsumed += (U32)(sizeof(size_t) - srcSize)*8;
|
|
}
|
|
|
|
return srcSize;
|
|
}
|
|
|
|
MEM_STATIC size_t BIT_lookBits(BIT_DStream_t* bitD, U32 nbBits)
|
|
{
|
|
const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1;
|
|
return ((bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> 1) >> ((bitMask-nbBits) & bitMask);
|
|
}
|
|
|
|
/*! BIT_lookBitsFast :
|
|
* unsafe version; only works only if nbBits >= 1 */
|
|
MEM_STATIC size_t BIT_lookBitsFast(BIT_DStream_t* bitD, U32 nbBits)
|
|
{
|
|
const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1;
|
|
return (bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> (((bitMask+1)-nbBits) & bitMask);
|
|
}
|
|
|
|
MEM_STATIC void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits)
|
|
{
|
|
bitD->bitsConsumed += nbBits;
|
|
}
|
|
|
|
MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, U32 nbBits)
|
|
{
|
|
size_t value = BIT_lookBits(bitD, nbBits);
|
|
BIT_skipBits(bitD, nbBits);
|
|
return value;
|
|
}
|
|
|
|
/*!BIT_readBitsFast :
|
|
* unsafe version; only works only if nbBits >= 1 */
|
|
MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, U32 nbBits)
|
|
{
|
|
size_t value = BIT_lookBitsFast(bitD, nbBits);
|
|
BIT_skipBits(bitD, nbBits);
|
|
return value;
|
|
}
|
|
|
|
MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD)
|
|
{
|
|
if (bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8)) /* should never happen */
|
|
return BIT_DStream_overflow;
|
|
|
|
if (bitD->ptr >= bitD->start + sizeof(bitD->bitContainer))
|
|
{
|
|
bitD->ptr -= bitD->bitsConsumed >> 3;
|
|
bitD->bitsConsumed &= 7;
|
|
bitD->bitContainer = MEM_readLEST(bitD->ptr);
|
|
return BIT_DStream_unfinished;
|
|
}
|
|
if (bitD->ptr == bitD->start)
|
|
{
|
|
if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return BIT_DStream_endOfBuffer;
|
|
return BIT_DStream_completed;
|
|
}
|
|
{
|
|
U32 nbBytes = bitD->bitsConsumed >> 3;
|
|
BIT_DStream_status result = BIT_DStream_unfinished;
|
|
if (bitD->ptr - nbBytes < bitD->start)
|
|
{
|
|
nbBytes = (U32)(bitD->ptr - bitD->start); /* ptr > start */
|
|
result = BIT_DStream_endOfBuffer;
|
|
}
|
|
bitD->ptr -= nbBytes;
|
|
bitD->bitsConsumed -= nbBytes*8;
|
|
bitD->bitContainer = MEM_readLEST(bitD->ptr); /* reminder : srcSize > sizeof(bitD) */
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/*! BIT_endOfDStream
|
|
* @return Tells if DStream has reached its exact end
|
|
*/
|
|
MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* DStream)
|
|
{
|
|
return ((DStream->ptr == DStream->start) && (DStream->bitsConsumed == sizeof(DStream->bitContainer)*8));
|
|
}
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* BITSTREAM_H_MODULE */
|
|
|
|
|
|
|
|
/* ******************************************************************
|
|
FSE : Finite State Entropy coder
|
|
header file for static linking (only)
|
|
Copyright (C) 2013-2015, 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 :
|
|
- Source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
- Public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
****************************************************************** */
|
|
#ifndef FSE_STATIC_H
|
|
#define FSE_STATIC_H
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* *****************************************
|
|
* Static allocation
|
|
*******************************************/
|
|
/* FSE buffer bounds */
|
|
#define FSE_NCOUNTBOUND 512
|
|
#define FSE_BLOCKBOUND(size) (size + (size>>7))
|
|
#define FSE_COMPRESSBOUND(size) (FSE_NCOUNTBOUND + FSE_BLOCKBOUND(size)) /* Macro version, useful for static allocation */
|
|
|
|
/* It is possible to statically allocate FSE CTable/DTable as a table of unsigned using below macros */
|
|
#define FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) (1 + (1<<(maxTableLog-1)) + ((maxSymbolValue+1)*2))
|
|
#define FSE_DTABLE_SIZE_U32(maxTableLog) (1 + (1<<maxTableLog))
|
|
|
|
|
|
/* *****************************************
|
|
* FSE advanced API
|
|
*******************************************/
|
|
static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits);
|
|
/* build a fake FSE_DTable, designed to read an uncompressed bitstream where each symbol uses nbBits */
|
|
|
|
static size_t FSE_buildDTable_rle (FSE_DTable* dt, unsigned char symbolValue);
|
|
/* build a fake FSE_DTable, designed to always generate the same symbolValue */
|
|
|
|
|
|
|
|
/* *****************************************
|
|
* FSE symbol decompression API
|
|
*******************************************/
|
|
typedef struct
|
|
{
|
|
size_t state;
|
|
const void* table; /* precise table may vary, depending on U16 */
|
|
} FSE_DState_t;
|
|
|
|
|
|
static void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt);
|
|
|
|
static unsigned char FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD);
|
|
|
|
static unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr);
|
|
|
|
|
|
/* *****************************************
|
|
* FSE unsafe API
|
|
*******************************************/
|
|
static unsigned char FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD);
|
|
/* faster, but works only if nbBits is always >= 1 (otherwise, result will be corrupted) */
|
|
|
|
|
|
/* *****************************************
|
|
* Implementation of inlined functions
|
|
*******************************************/
|
|
/* decompression */
|
|
|
|
typedef struct {
|
|
U16 tableLog;
|
|
U16 fastMode;
|
|
} FSE_DTableHeader; /* sizeof U32 */
|
|
|
|
typedef struct
|
|
{
|
|
unsigned short newState;
|
|
unsigned char symbol;
|
|
unsigned char nbBits;
|
|
} FSE_decode_t; /* size == U32 */
|
|
|
|
MEM_STATIC void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt)
|
|
{
|
|
FSE_DTableHeader DTableH;
|
|
memcpy(&DTableH, dt, sizeof(DTableH));
|
|
DStatePtr->state = BIT_readBits(bitD, DTableH.tableLog);
|
|
BIT_reloadDStream(bitD);
|
|
DStatePtr->table = dt + 1;
|
|
}
|
|
|
|
MEM_STATIC BYTE FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD)
|
|
{
|
|
const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state];
|
|
const U32 nbBits = DInfo.nbBits;
|
|
BYTE symbol = DInfo.symbol;
|
|
size_t lowBits = BIT_readBits(bitD, nbBits);
|
|
|
|
DStatePtr->state = DInfo.newState + lowBits;
|
|
return symbol;
|
|
}
|
|
|
|
MEM_STATIC BYTE FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD)
|
|
{
|
|
const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state];
|
|
const U32 nbBits = DInfo.nbBits;
|
|
BYTE symbol = DInfo.symbol;
|
|
size_t lowBits = BIT_readBitsFast(bitD, nbBits);
|
|
|
|
DStatePtr->state = DInfo.newState + lowBits;
|
|
return symbol;
|
|
}
|
|
|
|
MEM_STATIC unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr)
|
|
{
|
|
return DStatePtr->state == 0;
|
|
}
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* FSE_STATIC_H */
|
|
|
|
/* ******************************************************************
|
|
FSE : Finite State Entropy coder
|
|
Copyright (C) 2013-2015, 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 :
|
|
- FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
- Public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
****************************************************************** */
|
|
|
|
#ifndef FSE_COMMONDEFS_ONLY
|
|
|
|
/* **************************************************************
|
|
* Tuning parameters
|
|
****************************************************************/
|
|
/*!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
|
|
* Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */
|
|
#define FSE_MAX_MEMORY_USAGE 14
|
|
#define FSE_DEFAULT_MEMORY_USAGE 13
|
|
|
|
/*!FSE_MAX_SYMBOL_VALUE :
|
|
* Maximum symbol value authorized.
|
|
* Required for proper stack allocation */
|
|
#define FSE_MAX_SYMBOL_VALUE 255
|
|
|
|
|
|
/* **************************************************************
|
|
* template functions type & suffix
|
|
****************************************************************/
|
|
#define FSE_FUNCTION_TYPE BYTE
|
|
#define FSE_FUNCTION_EXTENSION
|
|
#define FSE_DECODE_TYPE FSE_decode_t
|
|
|
|
|
|
#endif /* !FSE_COMMONDEFS_ONLY */
|
|
|
|
/* **************************************************************
|
|
* Compiler specifics
|
|
****************************************************************/
|
|
#ifdef _MSC_VER /* Visual Studio */
|
|
# define FORCE_INLINE static __forceinline
|
|
# include <intrin.h> /* For Visual 2005 */
|
|
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
|
|
# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */
|
|
#else
|
|
# if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */
|
|
# ifdef __GNUC__
|
|
# define FORCE_INLINE static inline __attribute__((always_inline))
|
|
# else
|
|
# define FORCE_INLINE static inline
|
|
# endif
|
|
# else
|
|
# define FORCE_INLINE static
|
|
# endif /* __STDC_VERSION__ */
|
|
#endif
|
|
|
|
|
|
/* **************************************************************
|
|
* Dependencies
|
|
****************************************************************/
|
|
#include <stdlib.h> /* malloc, free, qsort */
|
|
#include <string.h> /* memcpy, memset */
|
|
#include <stdio.h> /* printf (debug) */
|
|
|
|
|
|
/* ***************************************************************
|
|
* Constants
|
|
*****************************************************************/
|
|
#define FSE_MAX_TABLELOG (FSE_MAX_MEMORY_USAGE-2)
|
|
#define FSE_MAX_TABLESIZE (1U<<FSE_MAX_TABLELOG)
|
|
#define FSE_MAXTABLESIZE_MASK (FSE_MAX_TABLESIZE-1)
|
|
#define FSE_DEFAULT_TABLELOG (FSE_DEFAULT_MEMORY_USAGE-2)
|
|
#define FSE_MIN_TABLELOG 5
|
|
|
|
#define FSE_TABLELOG_ABSOLUTE_MAX 15
|
|
#if FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX
|
|
#error "FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX is not supported"
|
|
#endif
|
|
|
|
|
|
/* **************************************************************
|
|
* Error Management
|
|
****************************************************************/
|
|
#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
|
|
|
|
|
|
/* **************************************************************
|
|
* Complex types
|
|
****************************************************************/
|
|
typedef U32 DTable_max_t[FSE_DTABLE_SIZE_U32(FSE_MAX_TABLELOG)];
|
|
|
|
|
|
/*-**************************************************************
|
|
* Templates
|
|
****************************************************************/
|
|
/*
|
|
designed to be included
|
|
for type-specific functions (template emulation in C)
|
|
Objective is to write these functions only once, for improved maintenance
|
|
*/
|
|
|
|
/* safety checks */
|
|
#ifndef FSE_FUNCTION_EXTENSION
|
|
# error "FSE_FUNCTION_EXTENSION must be defined"
|
|
#endif
|
|
#ifndef FSE_FUNCTION_TYPE
|
|
# error "FSE_FUNCTION_TYPE must be defined"
|
|
#endif
|
|
|
|
/* Function names */
|
|
#define FSE_CAT(X,Y) X##Y
|
|
#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y)
|
|
#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y)
|
|
|
|
static U32 FSE_tableStep(U32 tableSize) { return (tableSize>>1) + (tableSize>>3) + 3; }
|
|
|
|
|
|
static size_t FSE_buildDTable(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog)
|
|
{
|
|
FSE_DTableHeader DTableH;
|
|
void* const tdPtr = dt+1; /* because dt is unsigned, 32-bits aligned on 32-bits */
|
|
FSE_DECODE_TYPE* const tableDecode = (FSE_DECODE_TYPE*) (tdPtr);
|
|
const U32 tableSize = 1 << tableLog;
|
|
const U32 tableMask = tableSize-1;
|
|
const U32 step = FSE_tableStep(tableSize);
|
|
U16 symbolNext[FSE_MAX_SYMBOL_VALUE+1];
|
|
U32 position = 0;
|
|
U32 highThreshold = tableSize-1;
|
|
const S16 largeLimit= (S16)(1 << (tableLog-1));
|
|
U32 noLarge = 1;
|
|
U32 s;
|
|
|
|
/* Sanity Checks */
|
|
if (maxSymbolValue > FSE_MAX_SYMBOL_VALUE) return ERROR(maxSymbolValue_tooLarge);
|
|
if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge);
|
|
|
|
/* Init, lay down lowprob symbols */
|
|
memset(tableDecode, 0, sizeof(FSE_DECODE_TYPE) * (maxSymbolValue+1) ); /* useless init, but keep static analyzer happy, and we don't need to performance optimize legacy decoders */
|
|
DTableH.tableLog = (U16)tableLog;
|
|
for (s=0; s<=maxSymbolValue; s++)
|
|
{
|
|
if (normalizedCounter[s]==-1)
|
|
{
|
|
tableDecode[highThreshold--].symbol = (FSE_FUNCTION_TYPE)s;
|
|
symbolNext[s] = 1;
|
|
}
|
|
else
|
|
{
|
|
if (normalizedCounter[s] >= largeLimit) noLarge=0;
|
|
symbolNext[s] = normalizedCounter[s];
|
|
}
|
|
}
|
|
|
|
/* Spread symbols */
|
|
for (s=0; s<=maxSymbolValue; s++)
|
|
{
|
|
int i;
|
|
for (i=0; i<normalizedCounter[s]; i++)
|
|
{
|
|
tableDecode[position].symbol = (FSE_FUNCTION_TYPE)s;
|
|
position = (position + step) & tableMask;
|
|
while (position > highThreshold) position = (position + step) & tableMask; /* lowprob area */
|
|
}
|
|
}
|
|
|
|
if (position!=0) return ERROR(GENERIC); /* position must reach all cells once, otherwise normalizedCounter is incorrect */
|
|
|
|
/* Build Decoding table */
|
|
{
|
|
U32 i;
|
|
for (i=0; i<tableSize; i++)
|
|
{
|
|
FSE_FUNCTION_TYPE symbol = (FSE_FUNCTION_TYPE)(tableDecode[i].symbol);
|
|
U16 nextState = symbolNext[symbol]++;
|
|
tableDecode[i].nbBits = (BYTE) (tableLog - BIT_highbit32 ((U32)nextState) );
|
|
tableDecode[i].newState = (U16) ( (nextState << tableDecode[i].nbBits) - tableSize);
|
|
}
|
|
}
|
|
|
|
DTableH.fastMode = (U16)noLarge;
|
|
memcpy(dt, &DTableH, sizeof(DTableH));
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifndef FSE_COMMONDEFS_ONLY
|
|
/******************************************
|
|
* FSE helper functions
|
|
******************************************/
|
|
static unsigned FSE_isError(size_t code) { return ERR_isError(code); }
|
|
|
|
|
|
/****************************************************************
|
|
* FSE NCount encoding-decoding
|
|
****************************************************************/
|
|
static short FSE_abs(short a)
|
|
{
|
|
return a<0 ? -a : a;
|
|
}
|
|
|
|
static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSVPtr, unsigned* tableLogPtr,
|
|
const void* headerBuffer, size_t hbSize)
|
|
{
|
|
const BYTE* const istart = (const BYTE*) headerBuffer;
|
|
const BYTE* const iend = istart + hbSize;
|
|
const BYTE* ip = istart;
|
|
int nbBits;
|
|
int remaining;
|
|
int threshold;
|
|
U32 bitStream;
|
|
int bitCount;
|
|
unsigned charnum = 0;
|
|
int previous0 = 0;
|
|
|
|
if (hbSize < 4) return ERROR(srcSize_wrong);
|
|
bitStream = MEM_readLE32(ip);
|
|
nbBits = (bitStream & 0xF) + FSE_MIN_TABLELOG; /* extract tableLog */
|
|
if (nbBits > FSE_TABLELOG_ABSOLUTE_MAX) return ERROR(tableLog_tooLarge);
|
|
bitStream >>= 4;
|
|
bitCount = 4;
|
|
*tableLogPtr = nbBits;
|
|
remaining = (1<<nbBits)+1;
|
|
threshold = 1<<nbBits;
|
|
nbBits++;
|
|
|
|
while ((remaining>1) && (charnum<=*maxSVPtr))
|
|
{
|
|
if (previous0)
|
|
{
|
|
unsigned n0 = charnum;
|
|
while ((bitStream & 0xFFFF) == 0xFFFF)
|
|
{
|
|
n0+=24;
|
|
if (ip < iend-5)
|
|
{
|
|
ip+=2;
|
|
bitStream = MEM_readLE32(ip) >> bitCount;
|
|
}
|
|
else
|
|
{
|
|
bitStream >>= 16;
|
|
bitCount+=16;
|
|
}
|
|
}
|
|
while ((bitStream & 3) == 3)
|
|
{
|
|
n0+=3;
|
|
bitStream>>=2;
|
|
bitCount+=2;
|
|
}
|
|
n0 += bitStream & 3;
|
|
bitCount += 2;
|
|
if (n0 > *maxSVPtr) return ERROR(maxSymbolValue_tooSmall);
|
|
while (charnum < n0) normalizedCounter[charnum++] = 0;
|
|
if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4))
|
|
{
|
|
ip += bitCount>>3;
|
|
bitCount &= 7;
|
|
bitStream = MEM_readLE32(ip) >> bitCount;
|
|
}
|
|
else
|
|
bitStream >>= 2;
|
|
}
|
|
{
|
|
const short max = (short)((2*threshold-1)-remaining);
|
|
short count;
|
|
|
|
if ((bitStream & (threshold-1)) < (U32)max)
|
|
{
|
|
count = (short)(bitStream & (threshold-1));
|
|
bitCount += nbBits-1;
|
|
}
|
|
else
|
|
{
|
|
count = (short)(bitStream & (2*threshold-1));
|
|
if (count >= threshold) count -= max;
|
|
bitCount += nbBits;
|
|
}
|
|
|
|
count--; /* extra accuracy */
|
|
remaining -= FSE_abs(count);
|
|
normalizedCounter[charnum++] = count;
|
|
previous0 = !count;
|
|
while (remaining < threshold)
|
|
{
|
|
nbBits--;
|
|
threshold >>= 1;
|
|
}
|
|
|
|
{
|
|
if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4))
|
|
{
|
|
ip += bitCount>>3;
|
|
bitCount &= 7;
|
|
}
|
|
else
|
|
{
|
|
bitCount -= (int)(8 * (iend - 4 - ip));
|
|
ip = iend - 4;
|
|
}
|
|
bitStream = MEM_readLE32(ip) >> (bitCount & 31);
|
|
}
|
|
}
|
|
}
|
|
if (remaining != 1) return ERROR(GENERIC);
|
|
*maxSVPtr = charnum-1;
|
|
|
|
ip += (bitCount+7)>>3;
|
|
if ((size_t)(ip-istart) > hbSize) return ERROR(srcSize_wrong);
|
|
return ip-istart;
|
|
}
|
|
|
|
|
|
/*********************************************************
|
|
* Decompression (Byte symbols)
|
|
*********************************************************/
|
|
static size_t FSE_buildDTable_rle (FSE_DTable* dt, BYTE symbolValue)
|
|
{
|
|
void* ptr = dt;
|
|
FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr;
|
|
void* dPtr = dt + 1;
|
|
FSE_decode_t* const cell = (FSE_decode_t*)dPtr;
|
|
|
|
DTableH->tableLog = 0;
|
|
DTableH->fastMode = 0;
|
|
|
|
cell->newState = 0;
|
|
cell->symbol = symbolValue;
|
|
cell->nbBits = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits)
|
|
{
|
|
void* ptr = dt;
|
|
FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr;
|
|
void* dPtr = dt + 1;
|
|
FSE_decode_t* const dinfo = (FSE_decode_t*)dPtr;
|
|
const unsigned tableSize = 1 << nbBits;
|
|
const unsigned tableMask = tableSize - 1;
|
|
const unsigned maxSymbolValue = tableMask;
|
|
unsigned s;
|
|
|
|
/* Sanity checks */
|
|
if (nbBits < 1) return ERROR(GENERIC); /* min size */
|
|
|
|
/* Build Decoding Table */
|
|
DTableH->tableLog = (U16)nbBits;
|
|
DTableH->fastMode = 1;
|
|
for (s=0; s<=maxSymbolValue; s++)
|
|
{
|
|
dinfo[s].newState = 0;
|
|
dinfo[s].symbol = (BYTE)s;
|
|
dinfo[s].nbBits = (BYTE)nbBits;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
FORCE_INLINE size_t FSE_decompress_usingDTable_generic(
|
|
void* dst, size_t maxDstSize,
|
|
const void* cSrc, size_t cSrcSize,
|
|
const FSE_DTable* dt, const unsigned fast)
|
|
{
|
|
BYTE* const ostart = (BYTE*) dst;
|
|
BYTE* op = ostart;
|
|
BYTE* const omax = op + maxDstSize;
|
|
BYTE* const olimit = omax-3;
|
|
|
|
BIT_DStream_t bitD;
|
|
FSE_DState_t state1;
|
|
FSE_DState_t state2;
|
|
size_t errorCode;
|
|
|
|
/* Init */
|
|
errorCode = BIT_initDStream(&bitD, cSrc, cSrcSize); /* replaced last arg by maxCompressed Size */
|
|
if (FSE_isError(errorCode)) return errorCode;
|
|
|
|
FSE_initDState(&state1, &bitD, dt);
|
|
FSE_initDState(&state2, &bitD, dt);
|
|
|
|
#define FSE_GETSYMBOL(statePtr) fast ? FSE_decodeSymbolFast(statePtr, &bitD) : FSE_decodeSymbol(statePtr, &bitD)
|
|
|
|
/* 4 symbols per loop */
|
|
for ( ; (BIT_reloadDStream(&bitD)==BIT_DStream_unfinished) && (op<olimit) ; op+=4)
|
|
{
|
|
op[0] = FSE_GETSYMBOL(&state1);
|
|
|
|
if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
|
|
BIT_reloadDStream(&bitD);
|
|
|
|
op[1] = FSE_GETSYMBOL(&state2);
|
|
|
|
if (FSE_MAX_TABLELOG*4+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
|
|
{ if (BIT_reloadDStream(&bitD) > BIT_DStream_unfinished) { op+=2; break; } }
|
|
|
|
op[2] = FSE_GETSYMBOL(&state1);
|
|
|
|
if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
|
|
BIT_reloadDStream(&bitD);
|
|
|
|
op[3] = FSE_GETSYMBOL(&state2);
|
|
}
|
|
|
|
/* tail */
|
|
/* note : BIT_reloadDStream(&bitD) >= FSE_DStream_partiallyFilled; Ends at exactly BIT_DStream_completed */
|
|
while (1)
|
|
{
|
|
if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state1))) )
|
|
break;
|
|
|
|
*op++ = FSE_GETSYMBOL(&state1);
|
|
|
|
if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state2))) )
|
|
break;
|
|
|
|
*op++ = FSE_GETSYMBOL(&state2);
|
|
}
|
|
|
|
/* end ? */
|
|
if (BIT_endOfDStream(&bitD) && FSE_endOfDState(&state1) && FSE_endOfDState(&state2))
|
|
return op-ostart;
|
|
|
|
if (op==omax) return ERROR(dstSize_tooSmall); /* dst buffer is full, but cSrc unfinished */
|
|
|
|
return ERROR(corruption_detected);
|
|
}
|
|
|
|
|
|
static size_t FSE_decompress_usingDTable(void* dst, size_t originalSize,
|
|
const void* cSrc, size_t cSrcSize,
|
|
const FSE_DTable* dt)
|
|
{
|
|
FSE_DTableHeader DTableH;
|
|
U32 fastMode;
|
|
|
|
memcpy(&DTableH, dt, sizeof(DTableH));
|
|
fastMode = DTableH.fastMode;
|
|
|
|
/* select fast mode (static) */
|
|
if (fastMode) return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 1);
|
|
return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 0);
|
|
}
|
|
|
|
|
|
static size_t FSE_decompress(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize)
|
|
{
|
|
const BYTE* const istart = (const BYTE*)cSrc;
|
|
const BYTE* ip = istart;
|
|
short counting[FSE_MAX_SYMBOL_VALUE+1];
|
|
DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */
|
|
unsigned tableLog;
|
|
unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE;
|
|
size_t errorCode;
|
|
|
|
if (cSrcSize<2) return ERROR(srcSize_wrong); /* too small input size */
|
|
|
|
/* normal FSE decoding mode */
|
|
errorCode = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize);
|
|
if (FSE_isError(errorCode)) return errorCode;
|
|
if (errorCode >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size */
|
|
ip += errorCode;
|
|
cSrcSize -= errorCode;
|
|
|
|
errorCode = FSE_buildDTable (dt, counting, maxSymbolValue, tableLog);
|
|
if (FSE_isError(errorCode)) return errorCode;
|
|
|
|
/* always return, even if it is an error code */
|
|
return FSE_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, dt);
|
|
}
|
|
|
|
|
|
|
|
#endif /* FSE_COMMONDEFS_ONLY */
|
|
|
|
|
|
/* ******************************************************************
|
|
Huff0 : Huffman coder, part of New Generation Entropy library
|
|
header file
|
|
Copyright (C) 2013-2015, 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 :
|
|
- Source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
- Public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
****************************************************************** */
|
|
#ifndef HUFF0_H
|
|
#define HUFF0_H
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* ****************************************
|
|
* Dependency
|
|
******************************************/
|
|
#include <stddef.h> /* size_t */
|
|
|
|
|
|
/* ****************************************
|
|
* Huff0 simple functions
|
|
******************************************/
|
|
static size_t HUF_decompress(void* dst, size_t dstSize,
|
|
const void* cSrc, size_t cSrcSize);
|
|
/*!
|
|
HUF_decompress():
|
|
Decompress Huff0 data from buffer 'cSrc', of size 'cSrcSize',
|
|
into already allocated destination buffer 'dst', of size 'dstSize'.
|
|
'dstSize' must be the exact size of original (uncompressed) data.
|
|
Note : in contrast with FSE, HUF_decompress can regenerate RLE (cSrcSize==1) and uncompressed (cSrcSize==dstSize) data, because it knows size to regenerate.
|
|
@return : size of regenerated data (== dstSize)
|
|
or an error code, which can be tested using HUF_isError()
|
|
*/
|
|
|
|
|
|
/* ****************************************
|
|
* Tool functions
|
|
******************************************/
|
|
/* Error Management */
|
|
static unsigned HUF_isError(size_t code); /* tells if a return value is an error code */
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* HUFF0_H */
|
|
|
|
|
|
/* ******************************************************************
|
|
Huff0 : Huffman coder, part of New Generation Entropy library
|
|
header file for static linking (only)
|
|
Copyright (C) 2013-2015, 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 :
|
|
- Source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
- Public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
****************************************************************** */
|
|
#ifndef HUFF0_STATIC_H
|
|
#define HUFF0_STATIC_H
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
|
|
/* ****************************************
|
|
* Static allocation macros
|
|
******************************************/
|
|
/* static allocation of Huff0's DTable */
|
|
#define HUF_DTABLE_SIZE(maxTableLog) (1 + (1<<maxTableLog)) /* nb Cells; use unsigned short for X2, unsigned int for X4 */
|
|
#define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) \
|
|
unsigned short DTable[HUF_DTABLE_SIZE(maxTableLog)] = { maxTableLog }
|
|
#define HUF_CREATE_STATIC_DTABLEX4(DTable, maxTableLog) \
|
|
unsigned int DTable[HUF_DTABLE_SIZE(maxTableLog)] = { maxTableLog }
|
|
#define HUF_CREATE_STATIC_DTABLEX6(DTable, maxTableLog) \
|
|
unsigned int DTable[HUF_DTABLE_SIZE(maxTableLog) * 3 / 2] = { maxTableLog }
|
|
|
|
|
|
/* ****************************************
|
|
* Advanced decompression functions
|
|
******************************************/
|
|
static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* single-symbol decoder */
|
|
static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* double-symbols decoder */
|
|
|
|
|
|
/* ****************************************
|
|
* Huff0 detailed API
|
|
******************************************/
|
|
/*!
|
|
HUF_decompress() does the following:
|
|
1. select the decompression algorithm (X2, X4, X6) based on pre-computed heuristics
|
|
2. build Huffman table from save, using HUF_readDTableXn()
|
|
3. decode 1 or 4 segments in parallel using HUF_decompressSXn_usingDTable
|
|
|
|
*/
|
|
static size_t HUF_readDTableX2 (unsigned short* DTable, const void* src, size_t srcSize);
|
|
static size_t HUF_readDTableX4 (unsigned* DTable, const void* src, size_t srcSize);
|
|
|
|
static size_t HUF_decompress4X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const unsigned short* DTable);
|
|
static size_t HUF_decompress4X4_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const unsigned* DTable);
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* HUFF0_STATIC_H */
|
|
|
|
|
|
|
|
/* ******************************************************************
|
|
Huff0 : Huffman coder, part of New Generation Entropy library
|
|
Copyright (C) 2013-2015, 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 :
|
|
- FSE+Huff0 source repository : https://github.com/Cyan4973/FiniteStateEntropy
|
|
****************************************************************** */
|
|
|
|
/* **************************************************************
|
|
* Compiler specifics
|
|
****************************************************************/
|
|
#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
|
|
/* inline is defined */
|
|
#elif defined(_MSC_VER)
|
|
# define inline __inline
|
|
#else
|
|
# define inline /* disable inline */
|
|
#endif
|
|
|
|
|
|
#ifdef _MSC_VER /* Visual Studio */
|
|
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
|
|
#endif
|
|
|
|
|
|
/* **************************************************************
|
|
* Includes
|
|
****************************************************************/
|
|
#include <stdlib.h> /* malloc, free, qsort */
|
|
#include <string.h> /* memcpy, memset */
|
|
#include <stdio.h> /* printf (debug) */
|
|
|
|
|
|
/* **************************************************************
|
|
* Constants
|
|
****************************************************************/
|
|
#define HUF_ABSOLUTEMAX_TABLELOG 16 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
|
|
#define HUF_MAX_TABLELOG 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */
|
|
#define HUF_DEFAULT_TABLELOG HUF_MAX_TABLELOG /* tableLog by default, when not specified */
|
|
#define HUF_MAX_SYMBOL_VALUE 255
|
|
#if (HUF_MAX_TABLELOG > HUF_ABSOLUTEMAX_TABLELOG)
|
|
# error "HUF_MAX_TABLELOG is too large !"
|
|
#endif
|
|
|
|
|
|
/* **************************************************************
|
|
* Error Management
|
|
****************************************************************/
|
|
static unsigned HUF_isError(size_t code) { return ERR_isError(code); }
|
|
#define HUF_STATIC_ASSERT(c) { enum { HUF_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
|
|
|
|
|
|
|
|
/*-*******************************************************
|
|
* Huff0 : Huffman block decompression
|
|
*********************************************************/
|
|
typedef struct { BYTE byte; BYTE nbBits; } HUF_DEltX2; /* single-symbol decoding */
|
|
|
|
typedef struct { U16 sequence; BYTE nbBits; BYTE length; } HUF_DEltX4; /* double-symbols decoding */
|
|
|
|
typedef struct { BYTE symbol; BYTE weight; } sortedSymbol_t;
|
|
|
|
/*! HUF_readStats
|
|
Read compact Huffman tree, saved by HUF_writeCTable
|
|
@huffWeight : destination buffer
|
|
@return : size read from `src`
|
|
*/
|
|
static size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, U32* rankStats,
|
|
U32* nbSymbolsPtr, U32* tableLogPtr,
|
|
const void* src, size_t srcSize)
|
|
{
|
|
U32 weightTotal;
|
|
U32 tableLog;
|
|
const BYTE* ip = (const BYTE*) src;
|
|
size_t iSize;
|
|
size_t oSize;
|
|
U32 n;
|
|
|
|
if (!srcSize) return ERROR(srcSize_wrong);
|
|
iSize = ip[0];
|
|
//memset(huffWeight, 0, hwSize); /* is not necessary, even though some analyzer complain ... */
|
|
|
|
if (iSize >= 128) /* special header */
|
|
{
|
|
if (iSize >= (242)) /* RLE */
|
|
{
|
|
static int l[14] = { 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 127, 128 };
|
|
oSize = l[iSize-242];
|
|
memset(huffWeight, 1, hwSize);
|
|
iSize = 0;
|
|
}
|
|
else /* Incompressible */
|
|
{
|
|
oSize = iSize - 127;
|
|
iSize = ((oSize+1)/2);
|
|
if (iSize+1 > srcSize) return ERROR(srcSize_wrong);
|
|
if (oSize >= hwSize) return ERROR(corruption_detected);
|
|
ip += 1;
|
|
for (n=0; n<oSize; n+=2)
|
|
{
|
|
huffWeight[n] = ip[n/2] >> 4;
|
|
huffWeight[n+1] = ip[n/2] & 15;
|
|
}
|
|
}
|
|
}
|
|
else /* header compressed with FSE (normal case) */
|
|
{
|
|
if (iSize+1 > srcSize) return ERROR(srcSize_wrong);
|
|
oSize = FSE_decompress(huffWeight, hwSize-1, ip+1, iSize); /* max (hwSize-1) values decoded, as last one is implied */
|
|
if (FSE_isError(oSize)) return oSize;
|
|
}
|
|
|
|
/* collect weight stats */
|
|
memset(rankStats, 0, (HUF_ABSOLUTEMAX_TABLELOG + 1) * sizeof(U32));
|
|
weightTotal = 0;
|
|
for (n=0; n<oSize; n++)
|
|
{
|
|
if (huffWeight[n] >= HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected);
|
|
rankStats[huffWeight[n]]++;
|
|
weightTotal += (1 << huffWeight[n]) >> 1;
|
|
}
|
|
if (weightTotal == 0) return ERROR(corruption_detected);
|
|
|
|
/* get last non-null symbol weight (implied, total must be 2^n) */
|
|
tableLog = BIT_highbit32(weightTotal) + 1;
|
|
if (tableLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected);
|
|
{
|
|
U32 total = 1 << tableLog;
|
|
U32 rest = total - weightTotal;
|
|
U32 verif = 1 << BIT_highbit32(rest);
|
|
U32 lastWeight = BIT_highbit32(rest) + 1;
|
|
if (verif != rest) return ERROR(corruption_detected); /* last value must be a clean power of 2 */
|
|
huffWeight[oSize] = (BYTE)lastWeight;
|
|
rankStats[lastWeight]++;
|
|
}
|
|
|
|
/* check tree construction validity */
|
|
if ((rankStats[1] < 2) || (rankStats[1] & 1)) return ERROR(corruption_detected); /* by construction : at least 2 elts of rank 1, must be even */
|
|
|
|
/* results */
|
|
*nbSymbolsPtr = (U32)(oSize+1);
|
|
*tableLogPtr = tableLog;
|
|
return iSize+1;
|
|
}
|
|
|
|
|
|
/**************************/
|
|
/* single-symbol decoding */
|
|
/**************************/
|
|
|
|
static size_t HUF_readDTableX2 (U16* DTable, const void* src, size_t srcSize)
|
|
{
|
|
BYTE huffWeight[HUF_MAX_SYMBOL_VALUE + 1];
|
|
U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; /* large enough for values from 0 to 16 */
|
|
U32 tableLog = 0;
|
|
size_t iSize;
|
|
U32 nbSymbols = 0;
|
|
U32 n;
|
|
U32 nextRankStart;
|
|
void* const dtPtr = DTable + 1;
|
|
HUF_DEltX2* const dt = (HUF_DEltX2*)dtPtr;
|
|
|
|
HUF_STATIC_ASSERT(sizeof(HUF_DEltX2) == sizeof(U16)); /* if compilation fails here, assertion is false */
|
|
//memset(huffWeight, 0, sizeof(huffWeight)); /* is not necessary, even though some analyzer complain ... */
|
|
|
|
iSize = HUF_readStats(huffWeight, HUF_MAX_SYMBOL_VALUE + 1, rankVal, &nbSymbols, &tableLog, src, srcSize);
|
|
if (HUF_isError(iSize)) return iSize;
|
|
|
|
/* check result */
|
|
if (tableLog > DTable[0]) return ERROR(tableLog_tooLarge); /* DTable is too small */
|
|
DTable[0] = (U16)tableLog; /* maybe should separate sizeof DTable, as allocated, from used size of DTable, in case of DTable re-use */
|
|
|
|
/* Prepare ranks */
|
|
nextRankStart = 0;
|
|
for (n=1; n<=tableLog; n++)
|
|
{
|
|
U32 current = nextRankStart;
|
|
nextRankStart += (rankVal[n] << (n-1));
|
|
rankVal[n] = current;
|
|
}
|
|
|
|
/* fill DTable */
|
|
for (n=0; n<nbSymbols; n++)
|
|
{
|
|
const U32 w = huffWeight[n];
|
|
const U32 length = (1 << w) >> 1;
|
|
U32 i;
|
|
HUF_DEltX2 D;
|
|
D.byte = (BYTE)n; D.nbBits = (BYTE)(tableLog + 1 - w);
|
|
for (i = rankVal[w]; i < rankVal[w] + length; i++)
|
|
dt[i] = D;
|
|
rankVal[w] += length;
|
|
}
|
|
|
|
return iSize;
|
|
}
|
|
|
|
static BYTE HUF_decodeSymbolX2(BIT_DStream_t* Dstream, const HUF_DEltX2* dt, const U32 dtLog)
|
|
{
|
|
const size_t val = BIT_lookBitsFast(Dstream, dtLog); /* note : dtLog >= 1 */
|
|
const BYTE c = dt[val].byte;
|
|
BIT_skipBits(Dstream, dt[val].nbBits);
|
|
return c;
|
|
}
|
|
|
|
#define HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) \
|
|
*ptr++ = HUF_decodeSymbolX2(DStreamPtr, dt, dtLog)
|
|
|
|
#define HUF_DECODE_SYMBOLX2_1(ptr, DStreamPtr) \
|
|
if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \
|
|
HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr)
|
|
|
|
#define HUF_DECODE_SYMBOLX2_2(ptr, DStreamPtr) \
|
|
if (MEM_64bits()) \
|
|
HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr)
|
|
|
|
static inline size_t HUF_decodeStreamX2(BYTE* p, BIT_DStream_t* const bitDPtr, BYTE* const pEnd, const HUF_DEltX2* const dt, const U32 dtLog)
|
|
{
|
|
BYTE* const pStart = p;
|
|
|
|
/* up to 4 symbols at a time */
|
|
while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-4))
|
|
{
|
|
HUF_DECODE_SYMBOLX2_2(p, bitDPtr);
|
|
HUF_DECODE_SYMBOLX2_1(p, bitDPtr);
|
|
HUF_DECODE_SYMBOLX2_2(p, bitDPtr);
|
|
HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
|
|
}
|
|
|
|
/* closer to the end */
|
|
while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd))
|
|
HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
|
|
|
|
/* no more data to retrieve from bitstream, hence no need to reload */
|
|
while (p < pEnd)
|
|
HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
|
|
|
|
return pEnd-pStart;
|
|
}
|
|
|
|
|
|
static size_t HUF_decompress4X2_usingDTable(
|
|
void* dst, size_t dstSize,
|
|
const void* cSrc, size_t cSrcSize,
|
|
const U16* DTable)
|
|
{
|
|
if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
|
|
|
|
{
|
|
const BYTE* const istart = (const BYTE*) cSrc;
|
|
BYTE* const ostart = (BYTE*) dst;
|
|
BYTE* const oend = ostart + dstSize;
|
|
const void* const dtPtr = DTable;
|
|
const HUF_DEltX2* const dt = ((const HUF_DEltX2*)dtPtr) +1;
|
|
const U32 dtLog = DTable[0];
|
|
size_t errorCode;
|
|
|
|
/* Init */
|
|
BIT_DStream_t bitD1;
|
|
BIT_DStream_t bitD2;
|
|
BIT_DStream_t bitD3;
|
|
BIT_DStream_t bitD4;
|
|
const size_t length1 = MEM_readLE16(istart);
|
|
const size_t length2 = MEM_readLE16(istart+2);
|
|
const size_t length3 = MEM_readLE16(istart+4);
|
|
size_t length4;
|
|
const BYTE* const istart1 = istart + 6; /* jumpTable */
|
|
const BYTE* const istart2 = istart1 + length1;
|
|
const BYTE* const istart3 = istart2 + length2;
|
|
const BYTE* const istart4 = istart3 + length3;
|
|
const size_t segmentSize = (dstSize+3) / 4;
|
|
BYTE* const opStart2 = ostart + segmentSize;
|
|
BYTE* const opStart3 = opStart2 + segmentSize;
|
|
BYTE* const opStart4 = opStart3 + segmentSize;
|
|
BYTE* op1 = ostart;
|
|
BYTE* op2 = opStart2;
|
|
BYTE* op3 = opStart3;
|
|
BYTE* op4 = opStart4;
|
|
U32 endSignal;
|
|
|
|
length4 = cSrcSize - (length1 + length2 + length3 + 6);
|
|
if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
|
|
errorCode = BIT_initDStream(&bitD1, istart1, length1);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
errorCode = BIT_initDStream(&bitD2, istart2, length2);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
errorCode = BIT_initDStream(&bitD3, istart3, length3);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
errorCode = BIT_initDStream(&bitD4, istart4, length4);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
|
|
/* 16-32 symbols per loop (4-8 symbols per stream) */
|
|
endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
|
|
for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; )
|
|
{
|
|
HUF_DECODE_SYMBOLX2_2(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX2_2(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX2_2(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX2_2(op4, &bitD4);
|
|
HUF_DECODE_SYMBOLX2_1(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX2_1(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX2_1(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX2_1(op4, &bitD4);
|
|
HUF_DECODE_SYMBOLX2_2(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX2_2(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX2_2(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX2_2(op4, &bitD4);
|
|
HUF_DECODE_SYMBOLX2_0(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX2_0(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX2_0(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX2_0(op4, &bitD4);
|
|
|
|
endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
|
|
}
|
|
|
|
/* check corruption */
|
|
if (op1 > opStart2) return ERROR(corruption_detected);
|
|
if (op2 > opStart3) return ERROR(corruption_detected);
|
|
if (op3 > opStart4) return ERROR(corruption_detected);
|
|
/* note : op4 supposed already verified within main loop */
|
|
|
|
/* finish bitStreams one by one */
|
|
HUF_decodeStreamX2(op1, &bitD1, opStart2, dt, dtLog);
|
|
HUF_decodeStreamX2(op2, &bitD2, opStart3, dt, dtLog);
|
|
HUF_decodeStreamX2(op3, &bitD3, opStart4, dt, dtLog);
|
|
HUF_decodeStreamX2(op4, &bitD4, oend, dt, dtLog);
|
|
|
|
/* check */
|
|
endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4);
|
|
if (!endSignal) return ERROR(corruption_detected);
|
|
|
|
/* decoded size */
|
|
return dstSize;
|
|
}
|
|
}
|
|
|
|
|
|
static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
|
|
{
|
|
HUF_CREATE_STATIC_DTABLEX2(DTable, HUF_MAX_TABLELOG);
|
|
const BYTE* ip = (const BYTE*) cSrc;
|
|
size_t errorCode;
|
|
|
|
errorCode = HUF_readDTableX2 (DTable, cSrc, cSrcSize);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
if (errorCode >= cSrcSize) return ERROR(srcSize_wrong);
|
|
ip += errorCode;
|
|
cSrcSize -= errorCode;
|
|
|
|
return HUF_decompress4X2_usingDTable (dst, dstSize, ip, cSrcSize, DTable);
|
|
}
|
|
|
|
|
|
/***************************/
|
|
/* double-symbols decoding */
|
|
/***************************/
|
|
|
|
static void HUF_fillDTableX4Level2(HUF_DEltX4* DTable, U32 sizeLog, const U32 consumed,
|
|
const U32* rankValOrigin, const int minWeight,
|
|
const sortedSymbol_t* sortedSymbols, const U32 sortedListSize,
|
|
U32 nbBitsBaseline, U16 baseSeq)
|
|
{
|
|
HUF_DEltX4 DElt;
|
|
U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1];
|
|
U32 s;
|
|
|
|
/* get pre-calculated rankVal */
|
|
memcpy(rankVal, rankValOrigin, sizeof(rankVal));
|
|
|
|
/* fill skipped values */
|
|
if (minWeight>1)
|
|
{
|
|
U32 i, skipSize = rankVal[minWeight];
|
|
MEM_writeLE16(&(DElt.sequence), baseSeq);
|
|
DElt.nbBits = (BYTE)(consumed);
|
|
DElt.length = 1;
|
|
for (i = 0; i < skipSize; i++)
|
|
DTable[i] = DElt;
|
|
}
|
|
|
|
/* fill DTable */
|
|
for (s=0; s<sortedListSize; s++) /* note : sortedSymbols already skipped */
|
|
{
|
|
const U32 symbol = sortedSymbols[s].symbol;
|
|
const U32 weight = sortedSymbols[s].weight;
|
|
const U32 nbBits = nbBitsBaseline - weight;
|
|
const U32 length = 1 << (sizeLog-nbBits);
|
|
const U32 start = rankVal[weight];
|
|
U32 i = start;
|
|
const U32 end = start + length;
|
|
|
|
MEM_writeLE16(&(DElt.sequence), (U16)(baseSeq + (symbol << 8)));
|
|
DElt.nbBits = (BYTE)(nbBits + consumed);
|
|
DElt.length = 2;
|
|
do { DTable[i++] = DElt; } while (i<end); /* since length >= 1 */
|
|
|
|
rankVal[weight] += length;
|
|
}
|
|
}
|
|
|
|
typedef U32 rankVal_t[HUF_ABSOLUTEMAX_TABLELOG][HUF_ABSOLUTEMAX_TABLELOG + 1];
|
|
|
|
static void HUF_fillDTableX4(HUF_DEltX4* DTable, const U32 targetLog,
|
|
const sortedSymbol_t* sortedList, const U32 sortedListSize,
|
|
const U32* rankStart, rankVal_t rankValOrigin, const U32 maxWeight,
|
|
const U32 nbBitsBaseline)
|
|
{
|
|
U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1];
|
|
const int scaleLog = nbBitsBaseline - targetLog; /* note : targetLog >= srcLog, hence scaleLog <= 1 */
|
|
const U32 minBits = nbBitsBaseline - maxWeight;
|
|
U32 s;
|
|
|
|
memcpy(rankVal, rankValOrigin, sizeof(rankVal));
|
|
|
|
/* fill DTable */
|
|
for (s=0; s<sortedListSize; s++)
|
|
{
|
|
const U16 symbol = sortedList[s].symbol;
|
|
const U32 weight = sortedList[s].weight;
|
|
const U32 nbBits = nbBitsBaseline - weight;
|
|
const U32 start = rankVal[weight];
|
|
const U32 length = 1 << (targetLog-nbBits);
|
|
|
|
if (targetLog-nbBits >= minBits) /* enough room for a second symbol */
|
|
{
|
|
U32 sortedRank;
|
|
int minWeight = nbBits + scaleLog;
|
|
if (minWeight < 1) minWeight = 1;
|
|
sortedRank = rankStart[minWeight];
|
|
HUF_fillDTableX4Level2(DTable+start, targetLog-nbBits, nbBits,
|
|
rankValOrigin[nbBits], minWeight,
|
|
sortedList+sortedRank, sortedListSize-sortedRank,
|
|
nbBitsBaseline, symbol);
|
|
}
|
|
else
|
|
{
|
|
U32 i;
|
|
const U32 end = start + length;
|
|
HUF_DEltX4 DElt;
|
|
|
|
MEM_writeLE16(&(DElt.sequence), symbol);
|
|
DElt.nbBits = (BYTE)(nbBits);
|
|
DElt.length = 1;
|
|
for (i = start; i < end; i++)
|
|
DTable[i] = DElt;
|
|
}
|
|
rankVal[weight] += length;
|
|
}
|
|
}
|
|
|
|
static size_t HUF_readDTableX4 (U32* DTable, const void* src, size_t srcSize)
|
|
{
|
|
BYTE weightList[HUF_MAX_SYMBOL_VALUE + 1];
|
|
sortedSymbol_t sortedSymbol[HUF_MAX_SYMBOL_VALUE + 1];
|
|
U32 rankStats[HUF_ABSOLUTEMAX_TABLELOG + 1] = { 0 };
|
|
U32 rankStart0[HUF_ABSOLUTEMAX_TABLELOG + 2] = { 0 };
|
|
U32* const rankStart = rankStart0+1;
|
|
rankVal_t rankVal;
|
|
U32 tableLog, maxW, sizeOfSort, nbSymbols;
|
|
const U32 memLog = DTable[0];
|
|
size_t iSize;
|
|
void* dtPtr = DTable;
|
|
HUF_DEltX4* const dt = ((HUF_DEltX4*)dtPtr) + 1;
|
|
|
|
HUF_STATIC_ASSERT(sizeof(HUF_DEltX4) == sizeof(U32)); /* if compilation fails here, assertion is false */
|
|
if (memLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(tableLog_tooLarge);
|
|
//memset(weightList, 0, sizeof(weightList)); /* is not necessary, even though some analyzer complain ... */
|
|
|
|
iSize = HUF_readStats(weightList, HUF_MAX_SYMBOL_VALUE + 1, rankStats, &nbSymbols, &tableLog, src, srcSize);
|
|
if (HUF_isError(iSize)) return iSize;
|
|
|
|
/* check result */
|
|
if (tableLog > memLog) return ERROR(tableLog_tooLarge); /* DTable can't fit code depth */
|
|
|
|
/* find maxWeight */
|
|
for (maxW = tableLog; rankStats[maxW]==0; maxW--)
|
|
{ if (!maxW) return ERROR(GENERIC); } /* necessarily finds a solution before maxW==0 */
|
|
|
|
/* Get start index of each weight */
|
|
{
|
|
U32 w, nextRankStart = 0;
|
|
for (w=1; w<=maxW; w++)
|
|
{
|
|
U32 current = nextRankStart;
|
|
nextRankStart += rankStats[w];
|
|
rankStart[w] = current;
|
|
}
|
|
rankStart[0] = nextRankStart; /* put all 0w symbols at the end of sorted list*/
|
|
sizeOfSort = nextRankStart;
|
|
}
|
|
|
|
/* sort symbols by weight */
|
|
{
|
|
U32 s;
|
|
for (s=0; s<nbSymbols; s++)
|
|
{
|
|
U32 w = weightList[s];
|
|
U32 r = rankStart[w]++;
|
|
sortedSymbol[r].symbol = (BYTE)s;
|
|
sortedSymbol[r].weight = (BYTE)w;
|
|
}
|
|
rankStart[0] = 0; /* forget 0w symbols; this is beginning of weight(1) */
|
|
}
|
|
|
|
/* Build rankVal */
|
|
{
|
|
const U32 minBits = tableLog+1 - maxW;
|
|
U32 nextRankVal = 0;
|
|
U32 w, consumed;
|
|
const int rescale = (memLog-tableLog) - 1; /* tableLog <= memLog */
|
|
U32* rankVal0 = rankVal[0];
|
|
for (w=1; w<=maxW; w++)
|
|
{
|
|
U32 current = nextRankVal;
|
|
nextRankVal += rankStats[w] << (w+rescale);
|
|
rankVal0[w] = current;
|
|
}
|
|
for (consumed = minBits; consumed <= memLog - minBits; consumed++)
|
|
{
|
|
U32* rankValPtr = rankVal[consumed];
|
|
for (w = 1; w <= maxW; w++)
|
|
{
|
|
rankValPtr[w] = rankVal0[w] >> consumed;
|
|
}
|
|
}
|
|
}
|
|
|
|
HUF_fillDTableX4(dt, memLog,
|
|
sortedSymbol, sizeOfSort,
|
|
rankStart0, rankVal, maxW,
|
|
tableLog+1);
|
|
|
|
return iSize;
|
|
}
|
|
|
|
|
|
static U32 HUF_decodeSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog)
|
|
{
|
|
const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */
|
|
memcpy(op, dt+val, 2);
|
|
BIT_skipBits(DStream, dt[val].nbBits);
|
|
return dt[val].length;
|
|
}
|
|
|
|
static U32 HUF_decodeLastSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog)
|
|
{
|
|
const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */
|
|
memcpy(op, dt+val, 1);
|
|
if (dt[val].length==1) BIT_skipBits(DStream, dt[val].nbBits);
|
|
else
|
|
{
|
|
if (DStream->bitsConsumed < (sizeof(DStream->bitContainer)*8))
|
|
{
|
|
BIT_skipBits(DStream, dt[val].nbBits);
|
|
if (DStream->bitsConsumed > (sizeof(DStream->bitContainer)*8))
|
|
DStream->bitsConsumed = (sizeof(DStream->bitContainer)*8); /* ugly hack; works only because it's the last symbol. Note : can't easily extract nbBits from just this symbol */
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
#define HUF_DECODE_SYMBOLX4_0(ptr, DStreamPtr) \
|
|
ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
|
|
|
|
#define HUF_DECODE_SYMBOLX4_1(ptr, DStreamPtr) \
|
|
if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \
|
|
ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
|
|
|
|
#define HUF_DECODE_SYMBOLX4_2(ptr, DStreamPtr) \
|
|
if (MEM_64bits()) \
|
|
ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
|
|
|
|
static inline size_t HUF_decodeStreamX4(BYTE* p, BIT_DStream_t* bitDPtr, BYTE* const pEnd, const HUF_DEltX4* const dt, const U32 dtLog)
|
|
{
|
|
BYTE* const pStart = p;
|
|
|
|
/* up to 8 symbols at a time */
|
|
while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd-7))
|
|
{
|
|
HUF_DECODE_SYMBOLX4_2(p, bitDPtr);
|
|
HUF_DECODE_SYMBOLX4_1(p, bitDPtr);
|
|
HUF_DECODE_SYMBOLX4_2(p, bitDPtr);
|
|
HUF_DECODE_SYMBOLX4_0(p, bitDPtr);
|
|
}
|
|
|
|
/* closer to the end */
|
|
while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-2))
|
|
HUF_DECODE_SYMBOLX4_0(p, bitDPtr);
|
|
|
|
while (p <= pEnd-2)
|
|
HUF_DECODE_SYMBOLX4_0(p, bitDPtr); /* no need to reload : reached the end of DStream */
|
|
|
|
if (p < pEnd)
|
|
p += HUF_decodeLastSymbolX4(p, bitDPtr, dt, dtLog);
|
|
|
|
return p-pStart;
|
|
}
|
|
|
|
static size_t HUF_decompress4X4_usingDTable(
|
|
void* dst, size_t dstSize,
|
|
const void* cSrc, size_t cSrcSize,
|
|
const U32* DTable)
|
|
{
|
|
if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
|
|
|
|
{
|
|
const BYTE* const istart = (const BYTE*) cSrc;
|
|
BYTE* const ostart = (BYTE*) dst;
|
|
BYTE* const oend = ostart + dstSize;
|
|
const void* const dtPtr = DTable;
|
|
const HUF_DEltX4* const dt = ((const HUF_DEltX4*)dtPtr) +1;
|
|
const U32 dtLog = DTable[0];
|
|
size_t errorCode;
|
|
|
|
/* Init */
|
|
BIT_DStream_t bitD1;
|
|
BIT_DStream_t bitD2;
|
|
BIT_DStream_t bitD3;
|
|
BIT_DStream_t bitD4;
|
|
const size_t length1 = MEM_readLE16(istart);
|
|
const size_t length2 = MEM_readLE16(istart+2);
|
|
const size_t length3 = MEM_readLE16(istart+4);
|
|
size_t length4;
|
|
const BYTE* const istart1 = istart + 6; /* jumpTable */
|
|
const BYTE* const istart2 = istart1 + length1;
|
|
const BYTE* const istart3 = istart2 + length2;
|
|
const BYTE* const istart4 = istart3 + length3;
|
|
const size_t segmentSize = (dstSize+3) / 4;
|
|
BYTE* const opStart2 = ostart + segmentSize;
|
|
BYTE* const opStart3 = opStart2 + segmentSize;
|
|
BYTE* const opStart4 = opStart3 + segmentSize;
|
|
BYTE* op1 = ostart;
|
|
BYTE* op2 = opStart2;
|
|
BYTE* op3 = opStart3;
|
|
BYTE* op4 = opStart4;
|
|
U32 endSignal;
|
|
|
|
length4 = cSrcSize - (length1 + length2 + length3 + 6);
|
|
if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
|
|
errorCode = BIT_initDStream(&bitD1, istart1, length1);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
errorCode = BIT_initDStream(&bitD2, istart2, length2);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
errorCode = BIT_initDStream(&bitD3, istart3, length3);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
errorCode = BIT_initDStream(&bitD4, istart4, length4);
|
|
if (HUF_isError(errorCode)) return errorCode;
|
|
|
|
/* 16-32 symbols per loop (4-8 symbols per stream) */
|
|
endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
|
|
for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; )
|
|
{
|
|
HUF_DECODE_SYMBOLX4_2(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX4_2(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX4_2(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX4_2(op4, &bitD4);
|
|
HUF_DECODE_SYMBOLX4_1(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX4_1(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX4_1(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX4_1(op4, &bitD4);
|
|
HUF_DECODE_SYMBOLX4_2(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX4_2(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX4_2(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX4_2(op4, &bitD4);
|
|
HUF_DECODE_SYMBOLX4_0(op1, &bitD1);
|
|
HUF_DECODE_SYMBOLX4_0(op2, &bitD2);
|
|
HUF_DECODE_SYMBOLX4_0(op3, &bitD3);
|
|
HUF_DECODE_SYMBOLX4_0(op4, &bitD4);
|
|
|
|
endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
|
|
}
|
|
|
|
/* check corruption */
|
|
if (op1 > opStart2) return ERROR(corruption_detected);
|
|
if (op2 > opStart3) return ERROR(corruption_detected);
|
|
if (op3 > opStart4) return ERROR(corruption_detected);
|
|
/* note : op4 supposed already verified within main loop */
|
|
|
|
/* finish bitStreams one by one */
|
|
HUF_decodeStreamX4(op1, &bitD1, opStart2, dt, dtLog);
|
|
HUF_decodeStreamX4(op2, &bitD2, opStart3, dt, dtLog);
|
|
HUF_decodeStreamX4(op3, &bitD3, opStart4, dt, dtLog);
|
|
HUF_decodeStreamX4(op4, &bitD4, oend, dt, dtLog);
|
|
|
|
/* check */
|
|
endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4);
|
|
if (!endSignal) return ERROR(corruption_detected);
|
|
|
|
/* decoded size */
|
|
return dstSize;
|
|
}
|
|
}
|
|
|
|
|
|
static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
|
|
{
|
|
HUF_CREATE_STATIC_DTABLEX4(DTable, HUF_MAX_TABLELOG);
|
|
const BYTE* ip = (const BYTE*) cSrc;
|
|
|
|
size_t hSize = HUF_readDTableX4 (DTable, cSrc, cSrcSize);
|
|
if (HUF_isError(hSize)) return hSize;
|
|
if (hSize >= cSrcSize) return ERROR(srcSize_wrong);
|
|
ip += hSize;
|
|
cSrcSize -= hSize;
|
|
|
|
return HUF_decompress4X4_usingDTable (dst, dstSize, ip, cSrcSize, DTable);
|
|
}
|
|
|
|
|
|
/**********************************/
|
|
/* Generic decompression selector */
|
|
/**********************************/
|
|
|
|
typedef struct { U32 tableTime; U32 decode256Time; } algo_time_t;
|
|
static const algo_time_t algoTime[16 /* Quantization */][3 /* single, double, quad */] =
|
|
{
|
|
/* single, double, quad */
|
|
{{0,0}, {1,1}, {2,2}}, /* Q==0 : impossible */
|
|
{{0,0}, {1,1}, {2,2}}, /* Q==1 : impossible */
|
|
{{ 38,130}, {1313, 74}, {2151, 38}}, /* Q == 2 : 12-18% */
|
|
{{ 448,128}, {1353, 74}, {2238, 41}}, /* Q == 3 : 18-25% */
|
|
{{ 556,128}, {1353, 74}, {2238, 47}}, /* Q == 4 : 25-32% */
|
|
{{ 714,128}, {1418, 74}, {2436, 53}}, /* Q == 5 : 32-38% */
|
|
{{ 883,128}, {1437, 74}, {2464, 61}}, /* Q == 6 : 38-44% */
|
|
{{ 897,128}, {1515, 75}, {2622, 68}}, /* Q == 7 : 44-50% */
|
|
{{ 926,128}, {1613, 75}, {2730, 75}}, /* Q == 8 : 50-56% */
|
|
{{ 947,128}, {1729, 77}, {3359, 77}}, /* Q == 9 : 56-62% */
|
|
{{1107,128}, {2083, 81}, {4006, 84}}, /* Q ==10 : 62-69% */
|
|
{{1177,128}, {2379, 87}, {4785, 88}}, /* Q ==11 : 69-75% */
|
|
{{1242,128}, {2415, 93}, {5155, 84}}, /* Q ==12 : 75-81% */
|
|
{{1349,128}, {2644,106}, {5260,106}}, /* Q ==13 : 81-87% */
|
|
{{1455,128}, {2422,124}, {4174,124}}, /* Q ==14 : 87-93% */
|
|
{{ 722,128}, {1891,145}, {1936,146}}, /* Q ==15 : 93-99% */
|
|
};
|
|
|
|
typedef size_t (*decompressionAlgo)(void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);
|
|
|
|
static size_t HUF_decompress (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
|
|
{
|
|
static const decompressionAlgo decompress[3] = { HUF_decompress4X2, HUF_decompress4X4, NULL };
|
|
/* estimate decompression time */
|
|
U32 Q;
|
|
const U32 D256 = (U32)(dstSize >> 8);
|
|
U32 Dtime[3];
|
|
U32 algoNb = 0;
|
|
int n;
|
|
|
|
/* validation checks */
|
|
if (dstSize == 0) return ERROR(dstSize_tooSmall);
|
|
if (cSrcSize > dstSize) return ERROR(corruption_detected); /* invalid */
|
|
if (cSrcSize == dstSize) { memcpy(dst, cSrc, dstSize); return dstSize; } /* not compressed */
|
|
if (cSrcSize == 1) { memset(dst, *(const BYTE*)cSrc, dstSize); return dstSize; } /* RLE */
|
|
|
|
/* decoder timing evaluation */
|
|
Q = (U32)(cSrcSize * 16 / dstSize); /* Q < 16 since dstSize > cSrcSize */
|
|
for (n=0; n<3; n++)
|
|
Dtime[n] = algoTime[Q][n].tableTime + (algoTime[Q][n].decode256Time * D256);
|
|
|
|
Dtime[1] += Dtime[1] >> 4; Dtime[2] += Dtime[2] >> 3; /* advantage to algorithms using less memory, for cache eviction */
|
|
|
|
if (Dtime[1] < Dtime[0]) algoNb = 1;
|
|
|
|
return decompress[algoNb](dst, dstSize, cSrc, cSrcSize);
|
|
|
|
//return HUF_decompress4X2(dst, dstSize, cSrc, cSrcSize); /* multi-streams single-symbol decoding */
|
|
//return HUF_decompress4X4(dst, dstSize, cSrc, cSrcSize); /* multi-streams double-symbols decoding */
|
|
//return HUF_decompress4X6(dst, dstSize, cSrc, cSrcSize); /* multi-streams quad-symbols decoding */
|
|
}
|
|
|
|
|
|
|
|
#endif /* ZSTD_CCOMMON_H_MODULE */
|
|
|
|
|
|
/*
|
|
zstd - decompression module fo v0.4 legacy format
|
|
Copyright (C) 2015-2016, 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 :
|
|
- zstd source repository : https://github.com/Cyan4973/zstd
|
|
- ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
*/
|
|
|
|
/* ***************************************************************
|
|
* Tuning parameters
|
|
*****************************************************************/
|
|
/*!
|
|
* HEAPMODE :
|
|
* Select how default decompression function ZSTD_decompress() will allocate memory,
|
|
* in memory stack (0), or in memory heap (1, requires malloc())
|
|
*/
|
|
#ifndef ZSTD_HEAPMODE
|
|
# define ZSTD_HEAPMODE 1
|
|
#endif
|
|
|
|
|
|
/* *******************************************************
|
|
* Includes
|
|
*********************************************************/
|
|
#include <stdlib.h> /* calloc */
|
|
#include <string.h> /* memcpy, memmove */
|
|
#include <stdio.h> /* debug : printf */
|
|
|
|
|
|
/* *******************************************************
|
|
* Compiler specifics
|
|
*********************************************************/
|
|
#ifdef _MSC_VER /* Visual Studio */
|
|
# include <intrin.h> /* For Visual 2005 */
|
|
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
|
|
# pragma warning(disable : 4324) /* disable: C4324: padded structure */
|
|
#endif
|
|
|
|
|
|
/* *************************************
|
|
* Local types
|
|
***************************************/
|
|
typedef struct
|
|
{
|
|
blockType_t blockType;
|
|
U32 origSize;
|
|
} blockProperties_t;
|
|
|
|
|
|
/* *******************************************************
|
|
* Memory operations
|
|
**********************************************************/
|
|
static void ZSTD_copy4(void* dst, const void* src) { memcpy(dst, src, 4); }
|
|
|
|
|
|
/* *************************************
|
|
* Error Management
|
|
***************************************/
|
|
|
|
/*! ZSTD_isError
|
|
* tells if a return value is an error code */
|
|
static unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
|
|
|
|
|
|
/* *************************************************************
|
|
* Context management
|
|
***************************************************************/
|
|
typedef enum { ZSTDds_getFrameHeaderSize, ZSTDds_decodeFrameHeader,
|
|
ZSTDds_decodeBlockHeader, ZSTDds_decompressBlock } ZSTD_dStage;
|
|
|
|
struct ZSTDv04_Dctx_s
|
|
{
|
|
U32 LLTable[FSE_DTABLE_SIZE_U32(LLFSELog)];
|
|
U32 OffTable[FSE_DTABLE_SIZE_U32(OffFSELog)];
|
|
U32 MLTable[FSE_DTABLE_SIZE_U32(MLFSELog)];
|
|
const void* previousDstEnd;
|
|
const void* base;
|
|
const void* vBase;
|
|
const void* dictEnd;
|
|
size_t expected;
|
|
size_t headerSize;
|
|
ZSTD_parameters params;
|
|
blockType_t bType;
|
|
ZSTD_dStage stage;
|
|
const BYTE* litPtr;
|
|
size_t litSize;
|
|
BYTE litBuffer[BLOCKSIZE + 8 /* margin for wildcopy */];
|
|
BYTE headerBuffer[ZSTD_frameHeaderSize_max];
|
|
}; /* typedef'd to ZSTD_DCtx within "zstd_static.h" */
|
|
|
|
static size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx)
|
|
{
|
|
dctx->expected = ZSTD_frameHeaderSize_min;
|
|
dctx->stage = ZSTDds_getFrameHeaderSize;
|
|
dctx->previousDstEnd = NULL;
|
|
dctx->base = NULL;
|
|
dctx->vBase = NULL;
|
|
dctx->dictEnd = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static ZSTD_DCtx* ZSTD_createDCtx(void)
|
|
{
|
|
ZSTD_DCtx* dctx = (ZSTD_DCtx*)malloc(sizeof(ZSTD_DCtx));
|
|
if (dctx==NULL) return NULL;
|
|
ZSTD_resetDCtx(dctx);
|
|
return dctx;
|
|
}
|
|
|
|
static size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx)
|
|
{
|
|
free(dctx);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* *************************************************************
|
|
* Decompression section
|
|
***************************************************************/
|
|
/** ZSTD_decodeFrameHeader_Part1
|
|
* decode the 1st part of the Frame Header, which tells Frame Header size.
|
|
* srcSize must be == ZSTD_frameHeaderSize_min
|
|
* @return : the full size of the Frame Header */
|
|
static size_t ZSTD_decodeFrameHeader_Part1(ZSTD_DCtx* zc, const void* src, size_t srcSize)
|
|
{
|
|
U32 magicNumber;
|
|
if (srcSize != ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong);
|
|
magicNumber = MEM_readLE32(src);
|
|
if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
|
|
zc->headerSize = ZSTD_frameHeaderSize_min;
|
|
return zc->headerSize;
|
|
}
|
|
|
|
|
|
static size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize)
|
|
{
|
|
U32 magicNumber;
|
|
if (srcSize < ZSTD_frameHeaderSize_min) return ZSTD_frameHeaderSize_max;
|
|
magicNumber = MEM_readLE32(src);
|
|
if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
|
|
memset(params, 0, sizeof(*params));
|
|
params->windowLog = (((const BYTE*)src)[4] & 15) + ZSTD_WINDOWLOG_ABSOLUTEMIN;
|
|
if ((((const BYTE*)src)[4] >> 4) != 0) return ERROR(frameParameter_unsupported); /* reserved bits */
|
|
return 0;
|
|
}
|
|
|
|
/** ZSTD_decodeFrameHeader_Part2
|
|
* decode the full Frame Header
|
|
* srcSize must be the size provided by ZSTD_decodeFrameHeader_Part1
|
|
* @return : 0, or an error code, which can be tested using ZSTD_isError() */
|
|
static size_t ZSTD_decodeFrameHeader_Part2(ZSTD_DCtx* zc, const void* src, size_t srcSize)
|
|
{
|
|
size_t result;
|
|
if (srcSize != zc->headerSize) return ERROR(srcSize_wrong);
|
|
result = ZSTD_getFrameParams(&(zc->params), src, srcSize);
|
|
if ((MEM_32bits()) && (zc->params.windowLog > 25)) return ERROR(frameParameter_unsupported);
|
|
return result;
|
|
}
|
|
|
|
|
|
static size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bpPtr)
|
|
{
|
|
const BYTE* const in = (const BYTE* const)src;
|
|
BYTE headerFlags;
|
|
U32 cSize;
|
|
|
|
if (srcSize < 3) return ERROR(srcSize_wrong);
|
|
|
|
headerFlags = *in;
|
|
cSize = in[2] + (in[1]<<8) + ((in[0] & 7)<<16);
|
|
|
|
bpPtr->blockType = (blockType_t)(headerFlags >> 6);
|
|
bpPtr->origSize = (bpPtr->blockType == bt_rle) ? cSize : 0;
|
|
|
|
if (bpPtr->blockType == bt_end) return 0;
|
|
if (bpPtr->blockType == bt_rle) return 1;
|
|
return cSize;
|
|
}
|
|
|
|
static size_t ZSTD_copyRawBlock(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
|
|
{
|
|
if (srcSize > maxDstSize) return ERROR(dstSize_tooSmall);
|
|
memcpy(dst, src, srcSize);
|
|
return srcSize;
|
|
}
|
|
|
|
|
|
/** ZSTD_decompressLiterals
|
|
@return : nb of bytes read from src, or an error code*/
|
|
static size_t ZSTD_decompressLiterals(void* dst, size_t* maxDstSizePtr,
|
|
const void* src, size_t srcSize)
|
|
{
|
|
const BYTE* ip = (const BYTE*)src;
|
|
|
|
const size_t litSize = (MEM_readLE32(src) & 0x1FFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
|
|
const size_t litCSize = (MEM_readLE32(ip+2) & 0xFFFFFF) >> 5; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
|
|
|
|
if (litSize > *maxDstSizePtr) return ERROR(corruption_detected);
|
|
if (litCSize + 5 > srcSize) return ERROR(corruption_detected);
|
|
|
|
if (HUF_isError(HUF_decompress(dst, litSize, ip+5, litCSize))) return ERROR(corruption_detected);
|
|
|
|
*maxDstSizePtr = litSize;
|
|
return litCSize + 5;
|
|
}
|
|
|
|
|
|
/** ZSTD_decodeLiteralsBlock
|
|
@return : nb of bytes read from src (< srcSize ) */
|
|
static size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
|
|
const void* src, size_t srcSize) /* note : srcSize < BLOCKSIZE */
|
|
{
|
|
const BYTE* const istart = (const BYTE*) src;
|
|
|
|
/* any compressed block with literals segment must be at least this size */
|
|
if (srcSize < MIN_CBLOCK_SIZE) return ERROR(corruption_detected);
|
|
|
|
switch(*istart & 3)
|
|
{
|
|
/* compressed */
|
|
case 0:
|
|
{
|
|
size_t litSize = BLOCKSIZE;
|
|
const size_t readSize = ZSTD_decompressLiterals(dctx->litBuffer, &litSize, src, srcSize);
|
|
dctx->litPtr = dctx->litBuffer;
|
|
dctx->litSize = litSize;
|
|
memset(dctx->litBuffer + dctx->litSize, 0, 8);
|
|
return readSize; /* works if it's an error too */
|
|
}
|
|
case IS_RAW:
|
|
{
|
|
const size_t litSize = (MEM_readLE32(istart) & 0xFFFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
|
|
if (litSize > srcSize-11) /* risk of reading too far with wildcopy */
|
|
{
|
|
if (litSize > srcSize-3) return ERROR(corruption_detected);
|
|
memcpy(dctx->litBuffer, istart, litSize);
|
|
dctx->litPtr = dctx->litBuffer;
|
|
dctx->litSize = litSize;
|
|
memset(dctx->litBuffer + dctx->litSize, 0, 8);
|
|
return litSize+3;
|
|
}
|
|
/* direct reference into compressed stream */
|
|
dctx->litPtr = istart+3;
|
|
dctx->litSize = litSize;
|
|
return litSize+3; }
|
|
case IS_RLE:
|
|
{
|
|
const size_t litSize = (MEM_readLE32(istart) & 0xFFFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
|
|
if (litSize > BLOCKSIZE) return ERROR(corruption_detected);
|
|
memset(dctx->litBuffer, istart[3], litSize + 8);
|
|
dctx->litPtr = dctx->litBuffer;
|
|
dctx->litSize = litSize;
|
|
return 4;
|
|
}
|
|
default:
|
|
return ERROR(corruption_detected); /* forbidden nominal case */
|
|
}
|
|
}
|
|
|
|
|
|
static size_t ZSTD_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* dumpsLengthPtr,
|
|
FSE_DTable* DTableLL, FSE_DTable* DTableML, FSE_DTable* DTableOffb,
|
|
const void* src, size_t srcSize)
|
|
{
|
|
const BYTE* const istart = (const BYTE* const)src;
|
|
const BYTE* ip = istart;
|
|
const BYTE* const iend = istart + srcSize;
|
|
U32 LLtype, Offtype, MLtype;
|
|
U32 LLlog, Offlog, MLlog;
|
|
size_t dumpsLength;
|
|
|
|
/* check */
|
|
if (srcSize < 5) return ERROR(srcSize_wrong);
|
|
|
|
/* SeqHead */
|
|
*nbSeq = MEM_readLE16(ip); ip+=2;
|
|
LLtype = *ip >> 6;
|
|
Offtype = (*ip >> 4) & 3;
|
|
MLtype = (*ip >> 2) & 3;
|
|
if (*ip & 2)
|
|
{
|
|
dumpsLength = ip[2];
|
|
dumpsLength += ip[1] << 8;
|
|
ip += 3;
|
|
}
|
|
else
|
|
{
|
|
dumpsLength = ip[1];
|
|
dumpsLength += (ip[0] & 1) << 8;
|
|
ip += 2;
|
|
}
|
|
*dumpsPtr = ip;
|
|
ip += dumpsLength;
|
|
*dumpsLengthPtr = dumpsLength;
|
|
|
|
/* check */
|
|
if (ip > iend-3) return ERROR(srcSize_wrong); /* min : all 3 are "raw", hence no header, but at least xxLog bits per type */
|
|
|
|
/* sequences */
|
|
{
|
|
S16 norm[MaxML+1]; /* assumption : MaxML >= MaxLL >= MaxOff */
|
|
size_t headerSize;
|
|
|
|
/* Build DTables */
|
|
switch(LLtype)
|
|
{
|
|
case bt_rle :
|
|
LLlog = 0;
|
|
FSE_buildDTable_rle(DTableLL, *ip++); break;
|
|
case bt_raw :
|
|
LLlog = LLbits;
|
|
FSE_buildDTable_raw(DTableLL, LLbits); break;
|
|
default :
|
|
{ U32 max = MaxLL;
|
|
headerSize = FSE_readNCount(norm, &max, &LLlog, ip, iend-ip);
|
|
if (FSE_isError(headerSize)) return ERROR(GENERIC);
|
|
if (LLlog > LLFSELog) return ERROR(corruption_detected);
|
|
ip += headerSize;
|
|
FSE_buildDTable(DTableLL, norm, max, LLlog);
|
|
} }
|
|
|
|
switch(Offtype)
|
|
{
|
|
case bt_rle :
|
|
Offlog = 0;
|
|
if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */
|
|
FSE_buildDTable_rle(DTableOffb, *ip++ & MaxOff); /* if *ip > MaxOff, data is corrupted */
|
|
break;
|
|
case bt_raw :
|
|
Offlog = Offbits;
|
|
FSE_buildDTable_raw(DTableOffb, Offbits); break;
|
|
default :
|
|
{ U32 max = MaxOff;
|
|
headerSize = FSE_readNCount(norm, &max, &Offlog, ip, iend-ip);
|
|
if (FSE_isError(headerSize)) return ERROR(GENERIC);
|
|
if (Offlog > OffFSELog) return ERROR(corruption_detected);
|
|
ip += headerSize;
|
|
FSE_buildDTable(DTableOffb, norm, max, Offlog);
|
|
} }
|
|
|
|
switch(MLtype)
|
|
{
|
|
case bt_rle :
|
|
MLlog = 0;
|
|
if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */
|
|
FSE_buildDTable_rle(DTableML, *ip++); break;
|
|
case bt_raw :
|
|
MLlog = MLbits;
|
|
FSE_buildDTable_raw(DTableML, MLbits); break;
|
|
default :
|
|
{ U32 max = MaxML;
|
|
headerSize = FSE_readNCount(norm, &max, &MLlog, ip, iend-ip);
|
|
if (FSE_isError(headerSize)) return ERROR(GENERIC);
|
|
if (MLlog > MLFSELog) return ERROR(corruption_detected);
|
|
ip += headerSize;
|
|
FSE_buildDTable(DTableML, norm, max, MLlog);
|
|
} } }
|
|
|
|
return ip-istart;
|
|
}
|
|
|
|
|
|
typedef struct {
|
|
size_t litLength;
|
|
size_t offset;
|
|
size_t matchLength;
|
|
} seq_t;
|
|
|
|
typedef struct {
|
|
BIT_DStream_t DStream;
|
|
FSE_DState_t stateLL;
|
|
FSE_DState_t stateOffb;
|
|
FSE_DState_t stateML;
|
|
size_t prevOffset;
|
|
const BYTE* dumps;
|
|
const BYTE* dumpsEnd;
|
|
} seqState_t;
|
|
|
|
|
|
static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState)
|
|
{
|
|
size_t litLength;
|
|
size_t prevOffset;
|
|
size_t offset;
|
|
size_t matchLength;
|
|
const BYTE* dumps = seqState->dumps;
|
|
const BYTE* const de = seqState->dumpsEnd;
|
|
|
|
/* Literal length */
|
|
litLength = FSE_decodeSymbol(&(seqState->stateLL), &(seqState->DStream));
|
|
prevOffset = litLength ? seq->offset : seqState->prevOffset;
|
|
if (litLength == MaxLL) {
|
|
U32 add = *dumps++;
|
|
if (add < 255) litLength += add;
|
|
else {
|
|
litLength = dumps[0] + (dumps[1]<<8) + (dumps[2]<<16);
|
|
dumps += 3;
|
|
}
|
|
if (dumps > de) { litLength = MaxLL+255; } /* late correction, to avoid using uninitialized memory */
|
|
if (dumps >= de) { dumps = de-1; } /* late correction, to avoid read overflow (data is now corrupted anyway) */
|
|
}
|
|
|
|
/* Offset */
|
|
{ static const U32 offsetPrefix[MaxOff+1] = {
|
|
1 /*fake*/, 1, 2, 4, 8, 16, 32, 64, 128, 256,
|
|
512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144,
|
|
524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, /*fake*/ 1, 1, 1, 1, 1 };
|
|
U32 offsetCode, nbBits;
|
|
offsetCode = FSE_decodeSymbol(&(seqState->stateOffb), &(seqState->DStream)); /* <= maxOff, by table construction */
|
|
if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
|
|
nbBits = offsetCode - 1;
|
|
if (offsetCode==0) nbBits = 0; /* cmove */
|
|
offset = offsetPrefix[offsetCode] + BIT_readBits(&(seqState->DStream), nbBits);
|
|
if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
|
|
if (offsetCode==0) offset = prevOffset; /* cmove */
|
|
if (offsetCode | !litLength) seqState->prevOffset = seq->offset; /* cmove */
|
|
}
|
|
|
|
/* MatchLength */
|
|
matchLength = FSE_decodeSymbol(&(seqState->stateML), &(seqState->DStream));
|
|
if (matchLength == MaxML) {
|
|
U32 add = *dumps++;
|
|
if (add < 255) matchLength += add;
|
|
else {
|
|
matchLength = dumps[0] + (dumps[1]<<8) + (dumps[2]<<16);
|
|
dumps += 3;
|
|
}
|
|
if (dumps > de) { matchLength = MaxML+255; } /* late correction, to avoid using uninitialized memory */
|
|
if (dumps >= de) { dumps = de-1; } /* late correction, to avoid read overflow (data is now corrupted anyway) */
|
|
}
|
|
matchLength += MINMATCH;
|
|
|
|
/* save result */
|
|
seq->litLength = litLength;
|
|
seq->offset = offset;
|
|
seq->matchLength = matchLength;
|
|
seqState->dumps = dumps;
|
|
}
|
|
|
|
|
|
static size_t ZSTD_execSequence(BYTE* op,
|
|
BYTE* const oend, seq_t sequence,
|
|
const BYTE** litPtr, const BYTE* const litLimit,
|
|
const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd)
|
|
{
|
|
static const int dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */
|
|
static const int dec64table[] = { 8, 8, 8, 7, 8, 9,10,11 }; /* subtracted */
|
|
BYTE* const oLitEnd = op + sequence.litLength;
|
|
const size_t sequenceLength = sequence.litLength + sequence.matchLength;
|
|
BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */
|
|
BYTE* const oend_8 = oend-8;
|
|
const BYTE* const litEnd = *litPtr + sequence.litLength;
|
|
const BYTE* match = oLitEnd - sequence.offset;
|
|
|
|
/* check */
|
|
if (oLitEnd > oend_8) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of 8 from oend */
|
|
if (oMatchEnd > oend) return ERROR(dstSize_tooSmall); /* overwrite beyond dst buffer */
|
|
if (litEnd > litLimit) return ERROR(corruption_detected); /* risk read beyond lit buffer */
|
|
|
|
/* copy Literals */
|
|
ZSTD_wildcopy(op, *litPtr, sequence.litLength); /* note : oLitEnd <= oend-8 : no risk of overwrite beyond oend */
|
|
op = oLitEnd;
|
|
*litPtr = litEnd; /* update for next sequence */
|
|
|
|
/* copy Match */
|
|
if (sequence.offset > (size_t)(oLitEnd - base))
|
|
{
|
|
/* offset beyond prefix */
|
|
if (sequence.offset > (size_t)(oLitEnd - vBase))
|
|
return ERROR(corruption_detected);
|
|
match = dictEnd - (base-match);
|
|
if (match + sequence.matchLength <= dictEnd)
|
|
{
|
|
memmove(oLitEnd, match, sequence.matchLength);
|
|
return sequenceLength;
|
|
}
|
|
/* span extDict & currentPrefixSegment */
|
|
{
|
|
size_t length1 = dictEnd - match;
|
|
memmove(oLitEnd, match, length1);
|
|
op = oLitEnd + length1;
|
|
sequence.matchLength -= length1;
|
|
match = base;
|
|
if (op > oend_8 || sequence.matchLength < MINMATCH) {
|
|
while (op < oMatchEnd) *op++ = *match++;
|
|
return sequenceLength;
|
|
}
|
|
}
|
|
}
|
|
/* Requirement: op <= oend_8 */
|
|
|
|
/* match within prefix */
|
|
if (sequence.offset < 8) {
|
|
/* close range match, overlap */
|
|
const int sub2 = dec64table[sequence.offset];
|
|
op[0] = match[0];
|
|
op[1] = match[1];
|
|
op[2] = match[2];
|
|
op[3] = match[3];
|
|
match += dec32table[sequence.offset];
|
|
ZSTD_copy4(op+4, match);
|
|
match -= sub2;
|
|
} else {
|
|
ZSTD_copy8(op, match);
|
|
}
|
|
op += 8; match += 8;
|
|
|
|
if (oMatchEnd > oend-(16-MINMATCH))
|
|
{
|
|
if (op < oend_8)
|
|
{
|
|
ZSTD_wildcopy(op, match, oend_8 - op);
|
|
match += oend_8 - op;
|
|
op = oend_8;
|
|
}
|
|
while (op < oMatchEnd) *op++ = *match++;
|
|
}
|
|
else
|
|
{
|
|
ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8); /* works even if matchLength < 8, but must be signed */
|
|
}
|
|
return sequenceLength;
|
|
}
|
|
|
|
|
|
static size_t ZSTD_decompressSequences(
|
|
ZSTD_DCtx* dctx,
|
|
void* dst, size_t maxDstSize,
|
|
const void* seqStart, size_t seqSize)
|
|
{
|
|
const BYTE* ip = (const BYTE*)seqStart;
|
|
const BYTE* const iend = ip + seqSize;
|
|
BYTE* const ostart = (BYTE* const)dst;
|
|
BYTE* op = ostart;
|
|
BYTE* const oend = ostart + maxDstSize;
|
|
size_t errorCode, dumpsLength;
|
|
const BYTE* litPtr = dctx->litPtr;
|
|
const BYTE* const litEnd = litPtr + dctx->litSize;
|
|
int nbSeq;
|
|
const BYTE* dumps;
|
|
U32* DTableLL = dctx->LLTable;
|
|
U32* DTableML = dctx->MLTable;
|
|
U32* DTableOffb = dctx->OffTable;
|
|
const BYTE* const base = (const BYTE*) (dctx->base);
|
|
const BYTE* const vBase = (const BYTE*) (dctx->vBase);
|
|
const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd);
|
|
|
|
/* Build Decoding Tables */
|
|
errorCode = ZSTD_decodeSeqHeaders(&nbSeq, &dumps, &dumpsLength,
|
|
DTableLL, DTableML, DTableOffb,
|
|
ip, iend-ip);
|
|
if (ZSTD_isError(errorCode)) return errorCode;
|
|
ip += errorCode;
|
|
|
|
/* Regen sequences */
|
|
{
|
|
seq_t sequence;
|
|
seqState_t seqState;
|
|
|
|
memset(&sequence, 0, sizeof(sequence));
|
|
sequence.offset = 4;
|
|
seqState.dumps = dumps;
|
|
seqState.dumpsEnd = dumps + dumpsLength;
|
|
seqState.prevOffset = 4;
|
|
errorCode = BIT_initDStream(&(seqState.DStream), ip, iend-ip);
|
|
if (ERR_isError(errorCode)) return ERROR(corruption_detected);
|
|
FSE_initDState(&(seqState.stateLL), &(seqState.DStream), DTableLL);
|
|
FSE_initDState(&(seqState.stateOffb), &(seqState.DStream), DTableOffb);
|
|
FSE_initDState(&(seqState.stateML), &(seqState.DStream), DTableML);
|
|
|
|
for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && nbSeq ; )
|
|
{
|
|
size_t oneSeqSize;
|
|
nbSeq--;
|
|
ZSTD_decodeSequence(&sequence, &seqState);
|
|
oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litEnd, base, vBase, dictEnd);
|
|
if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
|
|
op += oneSeqSize;
|
|
}
|
|
|
|
/* check if reached exact end */
|
|
if ( !BIT_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected); /* DStream should be entirely and exactly consumed; otherwise data is corrupted */
|
|
|
|
/* last literal segment */
|
|
{
|
|
size_t lastLLSize = litEnd - litPtr;
|
|
if (litPtr > litEnd) return ERROR(corruption_detected);
|
|
if (op+lastLLSize > oend) return ERROR(dstSize_tooSmall);
|
|
if (op != litPtr) memcpy(op, litPtr, lastLLSize);
|
|
op += lastLLSize;
|
|
}
|
|
}
|
|
|
|
return op-ostart;
|
|
}
|
|
|
|
|
|
static void ZSTD_checkContinuity(ZSTD_DCtx* dctx, const void* dst)
|
|
{
|
|
if (dst != dctx->previousDstEnd) /* not contiguous */
|
|
{
|
|
dctx->dictEnd = dctx->previousDstEnd;
|
|
dctx->vBase = (const char*)dst - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base));
|
|
dctx->base = dst;
|
|
dctx->previousDstEnd = dst;
|
|
}
|
|
}
|
|
|
|
|
|
static size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
|
|
void* dst, size_t maxDstSize,
|
|
const void* src, size_t srcSize)
|
|
{
|
|
/* blockType == blockCompressed */
|
|
const BYTE* ip = (const BYTE*)src;
|
|
|
|
/* Decode literals sub-block */
|
|
size_t litCSize = ZSTD_decodeLiteralsBlock(dctx, src, srcSize);
|
|
if (ZSTD_isError(litCSize)) return litCSize;
|
|
ip += litCSize;
|
|
srcSize -= litCSize;
|
|
|
|
return ZSTD_decompressSequences(dctx, dst, maxDstSize, ip, srcSize);
|
|
}
|
|
|
|
|
|
static size_t ZSTD_decompress_usingDict(ZSTD_DCtx* ctx,
|
|
void* dst, size_t maxDstSize,
|
|
const void* src, size_t srcSize,
|
|
const void* dict, size_t dictSize)
|
|
{
|
|
const BYTE* ip = (const BYTE*)src;
|
|
const BYTE* iend = ip + srcSize;
|
|
BYTE* const ostart = (BYTE* const)dst;
|
|
BYTE* op = ostart;
|
|
BYTE* const oend = ostart + maxDstSize;
|
|
size_t remainingSize = srcSize;
|
|
blockProperties_t blockProperties;
|
|
|
|
/* init */
|
|
ZSTD_resetDCtx(ctx);
|
|
if (dict)
|
|
{
|
|
ZSTD_decompress_insertDictionary(ctx, dict, dictSize);
|
|
ctx->dictEnd = ctx->previousDstEnd;
|
|
ctx->vBase = (const char*)dst - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
|
|
ctx->base = dst;
|
|
}
|
|
else
|
|
{
|
|
ctx->vBase = ctx->base = ctx->dictEnd = dst;
|
|
}
|
|
|
|
/* Frame Header */
|
|
{
|
|
size_t frameHeaderSize;
|
|
if (srcSize < ZSTD_frameHeaderSize_min+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
|
|
frameHeaderSize = ZSTD_decodeFrameHeader_Part1(ctx, src, ZSTD_frameHeaderSize_min);
|
|
if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize;
|
|
if (srcSize < frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
|
|
ip += frameHeaderSize; remainingSize -= frameHeaderSize;
|
|
frameHeaderSize = ZSTD_decodeFrameHeader_Part2(ctx, src, frameHeaderSize);
|
|
if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize;
|
|
}
|
|
|
|
/* Loop on each block */
|
|
while (1)
|
|
{
|
|
size_t decodedSize=0;
|
|
size_t cBlockSize = ZSTD_getcBlockSize(ip, iend-ip, &blockProperties);
|
|
if (ZSTD_isError(cBlockSize)) return cBlockSize;
|
|
|
|
ip += ZSTD_blockHeaderSize;
|
|
remainingSize -= ZSTD_blockHeaderSize;
|
|
if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
|
|
|
|
switch(blockProperties.blockType)
|
|
{
|
|
case bt_compressed:
|
|
decodedSize = ZSTD_decompressBlock_internal(ctx, op, oend-op, ip, cBlockSize);
|
|
break;
|
|
case bt_raw :
|
|
decodedSize = ZSTD_copyRawBlock(op, oend-op, ip, cBlockSize);
|
|
break;
|
|
case bt_rle :
|
|
return ERROR(GENERIC); /* not yet supported */
|
|
break;
|
|
case bt_end :
|
|
/* end of frame */
|
|
if (remainingSize) return ERROR(srcSize_wrong);
|
|
break;
|
|
default:
|
|
return ERROR(GENERIC); /* impossible */
|
|
}
|
|
if (cBlockSize == 0) break; /* bt_end */
|
|
|
|
if (ZSTD_isError(decodedSize)) return decodedSize;
|
|
op += decodedSize;
|
|
ip += cBlockSize;
|
|
remainingSize -= cBlockSize;
|
|
}
|
|
|
|
return op-ostart;
|
|
}
|
|
|
|
/* ZSTD_errorFrameSizeInfoLegacy() :
|
|
assumes `cSize` and `dBound` are _not_ NULL */
|
|
static void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
|
|
{
|
|
*cSize = ret;
|
|
*dBound = ZSTD_CONTENTSIZE_ERROR;
|
|
}
|
|
|
|
void ZSTDv04_findFrameSizeInfoLegacy(const void *src, size_t srcSize, size_t* cSize, unsigned long long* dBound)
|
|
{
|
|
const BYTE* ip = (const BYTE*)src;
|
|
size_t remainingSize = srcSize;
|
|
size_t nbBlocks = 0;
|
|
blockProperties_t blockProperties;
|
|
|
|
/* Frame Header */
|
|
if (srcSize < ZSTD_frameHeaderSize_min) {
|
|
ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
|
|
return;
|
|
}
|
|
if (MEM_readLE32(src) != ZSTD_MAGICNUMBER) {
|
|
ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(prefix_unknown));
|
|
return;
|
|
}
|
|
ip += ZSTD_frameHeaderSize_min; remainingSize -= ZSTD_frameHeaderSize_min;
|
|
|
|
/* Loop on each block */
|
|
while (1)
|
|
{
|
|
size_t cBlockSize = ZSTD_getcBlockSize(ip, remainingSize, &blockProperties);
|
|
if (ZSTD_isError(cBlockSize)) {
|
|
ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, cBlockSize);
|
|
return;
|
|
}
|
|
|
|
ip += ZSTD_blockHeaderSize;
|
|
remainingSize -= ZSTD_blockHeaderSize;
|
|
if (cBlockSize > remainingSize) {
|
|
ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
|
|
return;
|
|
}
|
|
|
|
if (cBlockSize == 0) break; /* bt_end */
|
|
|
|
ip += cBlockSize;
|
|
remainingSize -= cBlockSize;
|
|
nbBlocks++;
|
|
}
|
|
|
|
*cSize = ip - (const BYTE*)src;
|
|
*dBound = nbBlocks * BLOCKSIZE;
|
|
}
|
|
|
|
/* ******************************
|
|
* Streaming Decompression API
|
|
********************************/
|
|
static size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx)
|
|
{
|
|
return dctx->expected;
|
|
}
|
|
|
|
static size_t ZSTD_decompressContinue(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
|
|
{
|
|
/* Sanity check */
|
|
if (srcSize != ctx->expected) return ERROR(srcSize_wrong);
|
|
ZSTD_checkContinuity(ctx, dst);
|
|
|
|
/* Decompress : frame header; part 1 */
|
|
switch (ctx->stage)
|
|
{
|
|
case ZSTDds_getFrameHeaderSize :
|
|
/* get frame header size */
|
|
if (srcSize != ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong); /* impossible */
|
|
ctx->headerSize = ZSTD_decodeFrameHeader_Part1(ctx, src, ZSTD_frameHeaderSize_min);
|
|
if (ZSTD_isError(ctx->headerSize)) return ctx->headerSize;
|
|
memcpy(ctx->headerBuffer, src, ZSTD_frameHeaderSize_min);
|
|
if (ctx->headerSize > ZSTD_frameHeaderSize_min) return ERROR(GENERIC); /* impossible */
|
|
ctx->expected = 0; /* not necessary to copy more */
|
|
/* fallthrough */
|
|
case ZSTDds_decodeFrameHeader:
|
|
/* get frame header */
|
|
{ size_t const result = ZSTD_decodeFrameHeader_Part2(ctx, ctx->headerBuffer, ctx->headerSize);
|
|
if (ZSTD_isError(result)) return result;
|
|
ctx->expected = ZSTD_blockHeaderSize;
|
|
ctx->stage = ZSTDds_decodeBlockHeader;
|
|
return 0;
|
|
}
|
|
case ZSTDds_decodeBlockHeader:
|
|
/* Decode block header */
|
|
{ blockProperties_t bp;
|
|
size_t const blockSize = ZSTD_getcBlockSize(src, ZSTD_blockHeaderSize, &bp);
|
|
if (ZSTD_isError(blockSize)) return blockSize;
|
|
if (bp.blockType == bt_end)
|
|
{
|
|
ctx->expected = 0;
|
|
ctx->stage = ZSTDds_getFrameHeaderSize;
|
|
}
|
|
else
|
|
{
|
|
ctx->expected = blockSize;
|
|
ctx->bType = bp.blockType;
|
|
ctx->stage = ZSTDds_decompressBlock;
|
|
}
|
|
return 0;
|
|
}
|
|
case ZSTDds_decompressBlock:
|
|
{
|
|
/* Decompress : block content */
|
|
size_t rSize;
|
|
switch(ctx->bType)
|
|
{
|
|
case bt_compressed:
|
|
rSize = ZSTD_decompressBlock_internal(ctx, dst, maxDstSize, src, srcSize);
|
|
break;
|
|
case bt_raw :
|
|
rSize = ZSTD_copyRawBlock(dst, maxDstSize, src, srcSize);
|
|
break;
|
|
case bt_rle :
|
|
return ERROR(GENERIC); /* not yet handled */
|
|
break;
|
|
case bt_end : /* should never happen (filtered at phase 1) */
|
|
rSize = 0;
|
|
break;
|
|
default:
|
|
return ERROR(GENERIC);
|
|
}
|
|
ctx->stage = ZSTDds_decodeBlockHeader;
|
|
ctx->expected = ZSTD_blockHeaderSize;
|
|
ctx->previousDstEnd = (char*)dst + rSize;
|
|
return rSize;
|
|
}
|
|
default:
|
|
return ERROR(GENERIC); /* impossible */
|
|
}
|
|
}
|
|
|
|
|
|
static void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* dict, size_t dictSize)
|
|
{
|
|
ctx->dictEnd = ctx->previousDstEnd;
|
|
ctx->vBase = (const char*)dict - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
|
|
ctx->base = dict;
|
|
ctx->previousDstEnd = (const char*)dict + dictSize;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
Buffered version of Zstd compression library
|
|
Copyright (C) 2015, 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 :
|
|
- zstd source repository : https://github.com/Cyan4973/zstd
|
|
- ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
|
|
*/
|
|
|
|
/* The objects defined into this file should be considered experimental.
|
|
* They are not labelled stable, as their prototype may change in the future.
|
|
* You can use them for tests, provide feedback, or if you can endure risk of future changes.
|
|
*/
|
|
|
|
/* *************************************
|
|
* Includes
|
|
***************************************/
|
|
#include <stdlib.h>
|
|
|
|
|
|
/** ************************************************
|
|
* Streaming decompression
|
|
*
|
|
* A ZBUFF_DCtx object is required to track streaming operation.
|
|
* Use ZBUFF_createDCtx() and ZBUFF_freeDCtx() to create/release resources.
|
|
* Use ZBUFF_decompressInit() to start a new decompression operation.
|
|
* ZBUFF_DCtx objects can be reused multiple times.
|
|
*
|
|
* Use ZBUFF_decompressContinue() repetitively to consume your input.
|
|
* *srcSizePtr and *maxDstSizePtr can be any size.
|
|
* The function will report how many bytes were read or written by modifying *srcSizePtr and *maxDstSizePtr.
|
|
* Note that it may not consume the entire input, in which case it's up to the caller to call again the function with remaining input.
|
|
* The content of dst will be overwritten (up to *maxDstSizePtr) at each function call, so save its content if it matters or change dst .
|
|
* return : a hint to preferred nb of bytes to use as input for next function call (it's only a hint, to improve latency)
|
|
* or 0 when a frame is completely decoded
|
|
* or an error code, which can be tested using ZBUFF_isError().
|
|
*
|
|
* Hint : recommended buffer sizes (not compulsory)
|
|
* output : 128 KB block size is the internal unit, it ensures it's always possible to write a full block when it's decoded.
|
|
* input : just follow indications from ZBUFF_decompressContinue() to minimize latency. It should always be <= 128 KB + 3 .
|
|
* **************************************************/
|
|
|
|
typedef enum { ZBUFFds_init, ZBUFFds_readHeader, ZBUFFds_loadHeader, ZBUFFds_decodeHeader,
|
|
ZBUFFds_read, ZBUFFds_load, ZBUFFds_flush } ZBUFF_dStage;
|
|
|
|
/* *** Resource management *** */
|
|
|
|
#define ZSTD_frameHeaderSize_max 5 /* too magical, should come from reference */
|
|
struct ZBUFFv04_DCtx_s {
|
|
ZSTD_DCtx* zc;
|
|
ZSTD_parameters params;
|
|
char* inBuff;
|
|
size_t inBuffSize;
|
|
size_t inPos;
|
|
char* outBuff;
|
|
size_t outBuffSize;
|
|
size_t outStart;
|
|
size_t outEnd;
|
|
size_t hPos;
|
|
const char* dict;
|
|
size_t dictSize;
|
|
ZBUFF_dStage stage;
|
|
unsigned char headerBuffer[ZSTD_frameHeaderSize_max];
|
|
}; /* typedef'd to ZBUFF_DCtx within "zstd_buffered.h" */
|
|
|
|
typedef ZBUFFv04_DCtx ZBUFF_DCtx;
|
|
|
|
|
|
static ZBUFF_DCtx* ZBUFF_createDCtx(void)
|
|
{
|
|
ZBUFF_DCtx* zbc = (ZBUFF_DCtx*)malloc(sizeof(ZBUFF_DCtx));
|
|
if (zbc==NULL) return NULL;
|
|
memset(zbc, 0, sizeof(*zbc));
|
|
zbc->zc = ZSTD_createDCtx();
|
|
zbc->stage = ZBUFFds_init;
|
|
return zbc;
|
|
}
|
|
|
|
static size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbc)
|
|
{
|
|
if (zbc==NULL) return 0; /* support free on null */
|
|
ZSTD_freeDCtx(zbc->zc);
|
|
free(zbc->inBuff);
|
|
free(zbc->outBuff);
|
|
free(zbc);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* *** Initialization *** */
|
|
|
|
static size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbc)
|
|
{
|
|
zbc->stage = ZBUFFds_readHeader;
|
|
zbc->hPos = zbc->inPos = zbc->outStart = zbc->outEnd = zbc->dictSize = 0;
|
|
return ZSTD_resetDCtx(zbc->zc);
|
|
}
|
|
|
|
|
|
static size_t ZBUFF_decompressWithDictionary(ZBUFF_DCtx* zbc, const void* src, size_t srcSize)
|
|
{
|
|
zbc->dict = (const char*)src;
|
|
zbc->dictSize = srcSize;
|
|
return 0;
|
|
}
|
|
|
|
static size_t ZBUFF_limitCopy(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
|
|
{
|
|
size_t length = MIN(maxDstSize, srcSize);
|
|
memcpy(dst, src, length);
|
|
return length;
|
|
}
|
|
|
|
/* *** Decompression *** */
|
|
|
|
static size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbc, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr)
|
|
{
|
|
const char* const istart = (const char*)src;
|
|
const char* ip = istart;
|
|
const char* const iend = istart + *srcSizePtr;
|
|
char* const ostart = (char*)dst;
|
|
char* op = ostart;
|
|
char* const oend = ostart + *maxDstSizePtr;
|
|
U32 notDone = 1;
|
|
|
|
DEBUGLOG(5, "ZBUFF_decompressContinue");
|
|
while (notDone)
|
|
{
|
|
switch(zbc->stage)
|
|
{
|
|
|
|
case ZBUFFds_init :
|
|
DEBUGLOG(5, "ZBUFF_decompressContinue: stage==ZBUFFds_init => ERROR(init_missing)");
|
|
return ERROR(init_missing);
|
|
|
|
case ZBUFFds_readHeader :
|
|
/* read header from src */
|
|
{ size_t const headerSize = ZSTD_getFrameParams(&(zbc->params), src, *srcSizePtr);
|
|
if (ZSTD_isError(headerSize)) return headerSize;
|
|
if (headerSize) {
|
|
/* not enough input to decode header : tell how many bytes would be necessary */
|
|
memcpy(zbc->headerBuffer+zbc->hPos, src, *srcSizePtr);
|
|
zbc->hPos += *srcSizePtr;
|
|
*maxDstSizePtr = 0;
|
|
zbc->stage = ZBUFFds_loadHeader;
|
|
return headerSize - zbc->hPos;
|
|
}
|
|
zbc->stage = ZBUFFds_decodeHeader;
|
|
break;
|
|
}
|
|
|
|
case ZBUFFds_loadHeader:
|
|
/* complete header from src */
|
|
{ size_t headerSize = ZBUFF_limitCopy(
|
|
zbc->headerBuffer + zbc->hPos, ZSTD_frameHeaderSize_max - zbc->hPos,
|
|
src, *srcSizePtr);
|
|
zbc->hPos += headerSize;
|
|
ip += headerSize;
|
|
headerSize = ZSTD_getFrameParams(&(zbc->params), zbc->headerBuffer, zbc->hPos);
|
|
if (ZSTD_isError(headerSize)) return headerSize;
|
|
if (headerSize) {
|
|
/* not enough input to decode header : tell how many bytes would be necessary */
|
|
*maxDstSizePtr = 0;
|
|
return headerSize - zbc->hPos;
|
|
} }
|
|
/* intentional fallthrough */
|
|
|
|
case ZBUFFds_decodeHeader:
|
|
/* apply header to create / resize buffers */
|
|
{ size_t const neededOutSize = (size_t)1 << zbc->params.windowLog;
|
|
size_t const neededInSize = BLOCKSIZE; /* a block is never > BLOCKSIZE */
|
|
if (zbc->inBuffSize < neededInSize) {
|
|
free(zbc->inBuff);
|
|
zbc->inBuffSize = neededInSize;
|
|
zbc->inBuff = (char*)malloc(neededInSize);
|
|
if (zbc->inBuff == NULL) return ERROR(memory_allocation);
|
|
}
|
|
if (zbc->outBuffSize < neededOutSize) {
|
|
free(zbc->outBuff);
|
|
zbc->outBuffSize = neededOutSize;
|
|
zbc->outBuff = (char*)malloc(neededOutSize);
|
|
if (zbc->outBuff == NULL) return ERROR(memory_allocation);
|
|
} }
|
|
if (zbc->dictSize)
|
|
ZSTD_decompress_insertDictionary(zbc->zc, zbc->dict, zbc->dictSize);
|
|
if (zbc->hPos) {
|
|
/* some data already loaded into headerBuffer : transfer into inBuff */
|
|
memcpy(zbc->inBuff, zbc->headerBuffer, zbc->hPos);
|
|
zbc->inPos = zbc->hPos;
|
|
zbc->hPos = 0;
|
|
zbc->stage = ZBUFFds_load;
|
|
break;
|
|
}
|
|
zbc->stage = ZBUFFds_read;
|
|
/* fall-through */
|
|
case ZBUFFds_read:
|
|
{
|
|
size_t neededInSize = ZSTD_nextSrcSizeToDecompress(zbc->zc);
|
|
if (neededInSize==0) /* end of frame */
|
|
{
|
|
zbc->stage = ZBUFFds_init;
|
|
notDone = 0;
|
|
break;
|
|
}
|
|
if ((size_t)(iend-ip) >= neededInSize)
|
|
{
|
|
/* directly decode from src */
|
|
size_t decodedSize = ZSTD_decompressContinue(zbc->zc,
|
|
zbc->outBuff + zbc->outStart, zbc->outBuffSize - zbc->outStart,
|
|
ip, neededInSize);
|
|
if (ZSTD_isError(decodedSize)) return decodedSize;
|
|
ip += neededInSize;
|
|
if (!decodedSize) break; /* this was just a header */
|
|
zbc->outEnd = zbc->outStart + decodedSize;
|
|
zbc->stage = ZBUFFds_flush;
|
|
break;
|
|
}
|
|
if (ip==iend) { notDone = 0; break; } /* no more input */
|
|
zbc->stage = ZBUFFds_load;
|
|
}
|
|
/* fall-through */
|
|
case ZBUFFds_load:
|
|
{
|
|
size_t neededInSize = ZSTD_nextSrcSizeToDecompress(zbc->zc);
|
|
size_t toLoad = neededInSize - zbc->inPos; /* should always be <= remaining space within inBuff */
|
|
size_t loadedSize;
|
|
if (toLoad > zbc->inBuffSize - zbc->inPos) return ERROR(corruption_detected); /* should never happen */
|
|
loadedSize = ZBUFF_limitCopy(zbc->inBuff + zbc->inPos, toLoad, ip, iend-ip);
|
|
ip += loadedSize;
|
|
zbc->inPos += loadedSize;
|
|
if (loadedSize < toLoad) { notDone = 0; break; } /* not enough input, wait for more */
|
|
{
|
|
size_t decodedSize = ZSTD_decompressContinue(zbc->zc,
|
|
zbc->outBuff + zbc->outStart, zbc->outBuffSize - zbc->outStart,
|
|
zbc->inBuff, neededInSize);
|
|
if (ZSTD_isError(decodedSize)) return decodedSize;
|
|
zbc->inPos = 0; /* input is consumed */
|
|
if (!decodedSize) { zbc->stage = ZBUFFds_read; break; } /* this was just a header */
|
|
zbc->outEnd = zbc->outStart + decodedSize;
|
|
zbc->stage = ZBUFFds_flush;
|
|
/* ZBUFFds_flush follows */
|
|
}
|
|
}
|
|
/* fall-through */
|
|
case ZBUFFds_flush:
|
|
{
|
|
size_t toFlushSize = zbc->outEnd - zbc->outStart;
|
|
size_t flushedSize = ZBUFF_limitCopy(op, oend-op, zbc->outBuff + zbc->outStart, toFlushSize);
|
|
op += flushedSize;
|
|
zbc->outStart += flushedSize;
|
|
if (flushedSize == toFlushSize)
|
|
{
|
|
zbc->stage = ZBUFFds_read;
|
|
if (zbc->outStart + BLOCKSIZE > zbc->outBuffSize)
|
|
zbc->outStart = zbc->outEnd = 0;
|
|
break;
|
|
}
|
|
/* cannot flush everything */
|
|
notDone = 0;
|
|
break;
|
|
}
|
|
default: return ERROR(GENERIC); /* impossible */
|
|
}
|
|
}
|
|
|
|
*srcSizePtr = ip-istart;
|
|
*maxDstSizePtr = op-ostart;
|
|
|
|
{
|
|
size_t nextSrcSizeHint = ZSTD_nextSrcSizeToDecompress(zbc->zc);
|
|
if (nextSrcSizeHint > 3) nextSrcSizeHint+= 3; /* get the next block header while at it */
|
|
nextSrcSizeHint -= zbc->inPos; /* already loaded*/
|
|
return nextSrcSizeHint;
|
|
}
|
|
}
|
|
|
|
|
|
/* *************************************
|
|
* Tool functions
|
|
***************************************/
|
|
unsigned ZBUFFv04_isError(size_t errorCode) { return ERR_isError(errorCode); }
|
|
const char* ZBUFFv04_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); }
|
|
|
|
size_t ZBUFFv04_recommendedDInSize() { return BLOCKSIZE + 3; }
|
|
size_t ZBUFFv04_recommendedDOutSize() { return BLOCKSIZE; }
|
|
|
|
|
|
|
|
/*- ========================================================================= -*/
|
|
|
|
/* final wrapping stage */
|
|
|
|
size_t ZSTDv04_decompressDCtx(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
|
|
{
|
|
return ZSTD_decompress_usingDict(dctx, dst, maxDstSize, src, srcSize, NULL, 0);
|
|
}
|
|
|
|
size_t ZSTDv04_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
|
|
{
|
|
#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1)
|
|
size_t regenSize;
|
|
ZSTD_DCtx* dctx = ZSTD_createDCtx();
|
|
if (dctx==NULL) return ERROR(memory_allocation);
|
|
regenSize = ZSTDv04_decompressDCtx(dctx, dst, maxDstSize, src, srcSize);
|
|
ZSTD_freeDCtx(dctx);
|
|
return regenSize;
|
|
#else
|
|
ZSTD_DCtx dctx;
|
|
return ZSTDv04_decompressDCtx(&dctx, dst, maxDstSize, src, srcSize);
|
|
#endif
|
|
}
|
|
|
|
size_t ZSTDv04_resetDCtx(ZSTDv04_Dctx* dctx) { return ZSTD_resetDCtx(dctx); }
|
|
|
|
size_t ZSTDv04_nextSrcSizeToDecompress(ZSTDv04_Dctx* dctx)
|
|
{
|
|
return ZSTD_nextSrcSizeToDecompress(dctx);
|
|
}
|
|
|
|
size_t ZSTDv04_decompressContinue(ZSTDv04_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
|
|
{
|
|
return ZSTD_decompressContinue(dctx, dst, maxDstSize, src, srcSize);
|
|
}
|
|
|
|
|
|
|
|
ZBUFFv04_DCtx* ZBUFFv04_createDCtx(void) { return ZBUFF_createDCtx(); }
|
|
size_t ZBUFFv04_freeDCtx(ZBUFFv04_DCtx* dctx) { return ZBUFF_freeDCtx(dctx); }
|
|
|
|
size_t ZBUFFv04_decompressInit(ZBUFFv04_DCtx* dctx) { return ZBUFF_decompressInit(dctx); }
|
|
size_t ZBUFFv04_decompressWithDictionary(ZBUFFv04_DCtx* dctx, const void* src, size_t srcSize)
|
|
{ return ZBUFF_decompressWithDictionary(dctx, src, srcSize); }
|
|
|
|
size_t ZBUFFv04_decompressContinue(ZBUFFv04_DCtx* dctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr)
|
|
{
|
|
DEBUGLOG(5, "ZBUFFv04_decompressContinue");
|
|
return ZBUFF_decompressContinue(dctx, dst, maxDstSizePtr, src, srcSizePtr);
|
|
}
|
|
|
|
ZSTD_DCtx* ZSTDv04_createDCtx(void) { return ZSTD_createDCtx(); }
|
|
size_t ZSTDv04_freeDCtx(ZSTD_DCtx* dctx) { return ZSTD_freeDCtx(dctx); }
|