Merge pull request #98 from Cyan4973/dev

v0.4.5

.gitignore

@@ -20,3 +20,21 @@
 # Visual solution files
 *.suo
 *.user
+
+# Build results
+[Dd]ebug/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Bb]in/
+[Oo]bj/
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile

.travis.yml

@@ -16,8 +16,10 @@ env:
   - ZSTD_TRAVIS_CI_ENV=armtest  
   - ZSTD_TRAVIS_CI_ENV=test  
   - ZSTD_TRAVIS_CI_ENV="-C programs test32"  
+  - ZSTD_TRAVIS_CI_ENV="-C programs test-zstd_nolegacy"
   - ZSTD_TRAVIS_CI_ENV=usan
   - ZSTD_TRAVIS_CI_ENV=asan
+  - ZSTD_TRAVIS_CI_ENV=asan32
   - ZSTD_TRAVIS_CI_ENV="-C programs valgrindTest"  
 
 matrix:

Makefile

@@ -32,7 +32,7 @@
 # ################################################################
 
 # Version number
-export VERSION := 0.4.0
+export VERSION := 0.4.5
 
 PRGDIR  = programs
 ZSTDDIR = lib
@@ -74,7 +74,7 @@ uninstall:
 	$(MAKE) -C $(PRGDIR) $@
 
 travis-install:
-	sudo $(MAKE) install
+	$(MAKE) install PREFIX=~/install_test_dir
 
 test:
 	$(MAKE) -C $(PRGDIR) $@
@@ -87,8 +87,8 @@ gpptest: clean
 	$(MAKE) all CC=g++ CFLAGS="-O3 -Wall -Wextra -Wundef -Wshadow -Wcast-align -Werror"
 
 armtest: clean
-	$(MAKE) -C $(ZSTDDIR) -e all CC=arm-linux-gnueabi-gcc MOREFLAGS="-Werror"
+	$(MAKE) -C $(ZSTDDIR) all CC=arm-linux-gnueabi-gcc MOREFLAGS="-Werror"
-	$(MAKE) -C $(PRGDIR) -e CC=arm-linux-gnueabi-gcc MOREFLAGS="-Werror"
+	$(MAKE) -C $(PRGDIR) CC=arm-linux-gnueabi-gcc MOREFLAGS="-Werror -static"
 
 usan: clean
 	$(MAKE) test CC=clang MOREFLAGS="-g -fsanitize=undefined"
@@ -96,6 +96,9 @@ usan: clean
 asan: clean
 	$(MAKE) test CC=clang MOREFLAGS="-g -fsanitize=address"
 
+asan32: clean
+	$(MAKE) -C $(PRGDIR) test32 CC=clang MOREFLAGS="-g -fsanitize=address"
+
 uasan: clean
 	$(MAKE) test CC=clang MOREFLAGS="-g -fsanitize=address -fsanitize=undefined"
 

NEWS

@@ -1,5 +1,25 @@
+v0.4.5
+new : -m/--multiple : compress/decompress multiple files
+
+v0.4.4
+Fixed : high compression modes for Windows 32 bits
+new : external dictionary API extended to buffered mode and accessible through command line
+new : windows DLL project, thanks to Christophe Chevalier
+
+v0.4.3 :
+new : external dictionary API
+new : zstd-frugal
+
+v0.4.2 :
+Generic minor improvements for small blocks
+Fixed : big-endian compatibility, by Peter Harris (#85)
+
+v0.4.1
+Fixed : ZSTD_LEGACY_SUPPORT=0 build mode (reported by Luben)
+removed `zstd.c`
+
 v0.4.0
-Command line utility is now compatible with high compression levels 
+Command line utility compatible with high compression levels 
 Removed zstdhc => merged into zstd
 Added : ZBUFF API (see zstd_buffered.h)
 Rolling buffer support

lib/Makefile

@@ -40,7 +40,7 @@ VERSION?= $(LIBVER)
 
 DESTDIR?=
 PREFIX ?= /usr/local
-CPPFLAGS= -I. -I./legacy -DZSTD_LEGACY_SUPPORT=1
+CPPFLAGS= -I.
 CFLAGS ?= -O3
 CFLAGS += -std=c99 -Wall -Wextra -Wundef -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes
 FLAGS   = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(MOREFLAGS)
@@ -48,6 +48,16 @@ FLAGS   = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(MOREFLAGS)
 LIBDIR ?= $(PREFIX)/lib
 INCLUDEDIR=$(PREFIX)/include
 
+ZSTD_FILES := zstd_compress.c zstd_decompress.c fse.c huff0.c
+ZSTD_LEGACY:= legacy/zstd_v01.c legacy/zstd_v02.c legacy/zstd_v03.c
+
+ifeq ($(ZSTD_LEGACY_SUPPORT), 0)
+CPPFLAGS  += -DZSTD_LEGACY_SUPPORT=0
+else
+ZSTD_FILES+= $(ZSTD_LEGACY)
+CPPFLAGS  += -I./legacy -DZSTD_LEGACY_SUPPORT=1
+endif
+
 
 # OS X linker doesn't support -soname, and use different extension
 # see : https://developer.apple.com/library/mac/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/DynamicLibraryDesignGuidelines.html
@@ -55,9 +65,9 @@ ifeq ($(shell uname), Darwin)
 	SHARED_EXT = dylib
 	SHARED_EXT_MAJOR = $(LIBVER_MAJOR).$(SHARED_EXT)
 	SHARED_EXT_VER = $(LIBVER).$(SHARED_EXT)
-	SONAME_FLAGS = -install_name $(PREFIX)/lib/libzstd.$(SHARED_EXT_MAJOR) -compatibility_version $(LIBVER_MAJOR) -current_version $(LIBVER)
+	SONAME_FLAGS = -install_name $(PREFIX)/lib/$@.$(SHARED_EXT_MAJOR) -compatibility_version $(LIBVER_MAJOR) -current_version $(LIBVER)
 else
-	SONAME_FLAGS = -Wl,-soname=libzstd.$(SHARED_EXT).$(LIBVER_MAJOR)
+	SONAME_FLAGS = -Wl,-soname=$@.$(SHARED_EXT).$(LIBVER_MAJOR)
 	SHARED_EXT = so
 	SHARED_EXT_MAJOR = $(SHARED_EXT).$(LIBVER_MAJOR)
 	SHARED_EXT_VER = $(SHARED_EXT).$(LIBVER)
@@ -70,11 +80,10 @@ default: clean libzstd
 
 all: clean libzstd
 
-libzstd: zstd_compress.c zstd_decompress.c huff0.c fse.c \
+libzstd: $(ZSTD_FILES)
-         legacy/zstd_v01.c legacy/zstd_v02.c legacy/zstd_v03.c
 	@echo compiling static library
 	@$(CC) $(FLAGS) -c $^
-	@$(AR) rcs libzstd.a *.o
+	@$(AR) rcs $@.a *.o
 	@echo compiling dynamic library $(LIBVER)
 	@$(CC) $(FLAGS) -shared $^ -fPIC $(SONAME_FLAGS) -o $@.$(SHARED_EXT_VER)
 	@echo creating versioned links
@@ -82,10 +91,9 @@ libzstd: zstd_compress.c zstd_decompress.c huff0.c fse.c \
 	@ln -sf $@.$(SHARED_EXT_VER) $@.$(SHARED_EXT)
 
 clean:
-	@rm -f core *.o *.a *.$(SHARED_EXT) *.$(SHARED_EXT).* libzstd.pc
+	@rm -f core *.o *.a *.gcda *.$(SHARED_EXT) *.$(SHARED_EXT).* libzstd.pc
 	@echo Cleaning library completed
 
-
 #------------------------------------------------------------------------
 #make install is validated only for Linux, OSX, kFreeBSD and Hurd targets
 ifneq (,$(filter $(shell uname),Linux Darwin GNU/kFreeBSD GNU))

lib/zstd.c

@@ -1,1462 +0,0 @@
-/*
-    zstd - standard compression library
-    Copyright (C) 2014-2015, 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
-*/
-
-/* ***************************************************************
-*  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
-*/
-#define ZSTD_MEMORY_USAGE 16
-
-/*!
- * HEAPMODE :
- * Select how default compression functions will allocate memory for their hash table,
- * in memory stack (0, fastest), or in memory heap (1, requires malloc())
- * Note that compression context is fairly large, as a consequence heap memory is recommended.
- */
-#ifndef ZSTD_HEAPMODE
-#  define ZSTD_HEAPMODE 1
-#endif /* ZSTD_HEAPMODE */
-
-/*!
-*  LEGACY_SUPPORT :
-*  decompressor can decode older formats (starting from Zstd 0.1+)
-*/
-#ifndef ZSTD_LEGACY_SUPPORT
-#  define ZSTD_LEGACY_SUPPORT 1
-#endif
-
-
-/* *******************************************************
-*  Includes
-*********************************************************/
-#include <stdlib.h>      /* calloc */
-#include <string.h>      /* memcpy, memmove */
-#include <stdio.h>       /* debug : printf */
-#include "mem.h"         /* low level memory routines */
-#include "zstd_static.h"
-#include "zstd_internal.h"
-#include "fse_static.h"
-#include "huff0.h"
-
-#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1)
-#  include "zstd_legacy.h"
-#endif
-
-
-/* *******************************************************
-*  Compiler specifics
-*********************************************************/
-#ifdef __AVX2__
-#  include <immintrin.h>   /* AVX2 intrinsics */
-#endif
-
-#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 : 4324)        /* disable: C4324: padded structure */
-#else
-#  define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#  ifdef __GNUC__
-#    define FORCE_INLINE static inline __attribute__((always_inline))
-#  else
-#    define FORCE_INLINE static inline
-#  endif
-#endif
-
-
-/* *******************************************************
-*  Constants
-*********************************************************/
-#define HASH_LOG (ZSTD_MEMORY_USAGE - 2)
-#define HASH_TABLESIZE (1 << HASH_LOG)
-#define HASH_MASK (HASH_TABLESIZE - 1)
-
-#define KNUTH 2654435761
-
-#define BIT7 128
-#define BIT6  64
-#define BIT5  32
-#define BIT4  16
-#define BIT1   2
-#define BIT0   1
-
-#define KB *(1 <<10)
-#define MB *(1 <<20)
-#define GB *(1U<<30)
-
-#define BLOCKSIZE (128 KB)                 /* define, for static allocation */
-#define IS_RAW BIT0
-#define IS_RLE BIT1
-
-static const U32 g_maxDistance = 4 * BLOCKSIZE;
-static const U32 g_maxLimit = 1 GB;
-
-#define WORKPLACESIZE (BLOCKSIZE*3)
-#define MINMATCH 4
-#define LitFSELog  11
-#define MLFSELog   10
-#define LLFSELog   10
-#define OffFSELog   9
-#define MAX(a,b) ((a)<(b)?(b):(a))
-#define MaxSeq MAX(MaxLL, MaxML)
-
-#define LITERAL_NOENTROPY 63
-#define COMMAND_NOENTROPY 7   /* to remove */
-
-static const size_t ZSTD_blockHeaderSize = 3;
-static const size_t ZSTD_frameHeaderSize = 4;
-
-
-/* *******************************************************
-*  Memory operations
-**********************************************************/
-static void ZSTD_copy4(void* dst, const void* src) { memcpy(dst, src, 4); }
-
-
-/* **************************************
-*  Local structures
-****************************************/
-void ZSTD_resetSeqStore(seqStore_t* ssPtr)
-{
-    ssPtr->offset = ssPtr->offsetStart;
-    ssPtr->lit = ssPtr->litStart;
-    ssPtr->litLength = ssPtr->litLengthStart;
-    ssPtr->matchLength = ssPtr->matchLengthStart;
-    ssPtr->dumps = ssPtr->dumpsStart;
-}
-
-struct ZSTD_CCtx_s
-{
-    const BYTE* base;
-    U32 current;
-    U32 nextUpdate;
-    seqStore_t seqStore;
-#ifdef __AVX2__
-    __m256i hashTable[HASH_TABLESIZE>>3];
-#else
-    U32 hashTable[HASH_TABLESIZE];
-#endif
-    BYTE buffer[WORKPLACESIZE];
-};
-
-
-void ZSTD_resetCCtx(ZSTD_CCtx* ctx)
-{
-    ctx->base = NULL;
-    ctx->seqStore.buffer = ctx->buffer;
-    ctx->seqStore.offsetStart = (U32*) (ctx->seqStore.buffer);
-    ctx->seqStore.offCodeStart = (BYTE*) (ctx->seqStore.offsetStart + (BLOCKSIZE>>2));
-    ctx->seqStore.litStart = ctx->seqStore.offCodeStart + (BLOCKSIZE>>2);
-    ctx->seqStore.litLengthStart =  ctx->seqStore.litStart + BLOCKSIZE;
-    ctx->seqStore.matchLengthStart = ctx->seqStore.litLengthStart + (BLOCKSIZE>>2);
-    ctx->seqStore.dumpsStart = ctx->seqStore.matchLengthStart + (BLOCKSIZE>>2);
-    memset(ctx->hashTable, 0, sizeof(ctx->hashTable));
-}
-
-ZSTD_CCtx* ZSTD_createCCtx(void)
-{
-    ZSTD_CCtx* ctx = (ZSTD_CCtx*) malloc( sizeof(ZSTD_CCtx) );
-    if (ctx==NULL) return NULL;
-    ZSTD_resetCCtx(ctx);
-    return ctx;
-}
-
-size_t ZSTD_freeCCtx(ZSTD_CCtx* ctx)
-{
-    free(ctx);
-    return 0;
-}
-
-
-/* *************************************
-*  Error Management
-***************************************/
-/*! ZSTD_isError
-*   tells if a return value is an error code */
-unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
-
-/*! ZSTD_getErrorName
-*   provides error code string (useful for debugging) */
-const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
-
-
-/* *************************************
-*  Tool functions
-***************************************/
-unsigned ZSTD_versionNumber (void) { return ZSTD_VERSION_NUMBER; }
-
-
-/* *******************************************************
-*  Compression
-*********************************************************/
-size_t ZSTD_compressBound(size_t srcSize)   /* maximum compressed size */
-{
-    return FSE_compressBound(srcSize) + 12;
-}
-
-
-size_t ZSTD_noCompressBlock (void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    BYTE* const ostart = (BYTE* const)dst;
-
-    if (srcSize + ZSTD_blockHeaderSize > maxDstSize) return ERROR(dstSize_tooSmall);
-    memcpy(ostart + ZSTD_blockHeaderSize, src, srcSize);
-
-    /* Build header */
-    ostart[0]  = (BYTE)(srcSize>>16);
-    ostart[1]  = (BYTE)(srcSize>>8);
-    ostart[2]  = (BYTE) srcSize;
-    ostart[0] += (BYTE)(bt_raw<<6);   /* is a raw (uncompressed) block */
-
-    return ZSTD_blockHeaderSize+srcSize;
-}
-
-
-static size_t ZSTD_compressRawLiteralsBlock (void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    BYTE* const ostart = (BYTE* const)dst;
-
-    if (srcSize + 3 > maxDstSize) return ERROR(dstSize_tooSmall);
-
-    MEM_writeLE32(dst, ((U32)srcSize << 2) | IS_RAW);
-    memcpy(ostart + 3, src, srcSize);
-    return srcSize + 3;
-}
-
-static size_t ZSTD_compressRleLiteralsBlock (void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    BYTE* const ostart = (BYTE* const)dst;
-
-    (void)maxDstSize;
-    MEM_writeLE32(dst, ((U32)srcSize << 2) | IS_RLE);  /* note : maxDstSize > litHeaderSize > 4 */
-    ostart[3] = *(const BYTE*)src;
-    return 4;
-}
-
-size_t ZSTD_minGain(size_t srcSize) { return (srcSize >> 6) + 1; }
-
-static size_t ZSTD_compressLiterals (void* dst, size_t maxDstSize,
-                               const void* src, size_t srcSize)
-{
-    const size_t minGain = ZSTD_minGain(srcSize);
-    BYTE* const ostart = (BYTE*)dst;
-    size_t hsize;
-    static const size_t litHeaderSize = 5;
-
-    if (maxDstSize < litHeaderSize+1) return ERROR(dstSize_tooSmall);   /* not enough space for compression */
-
-    hsize = HUF_compress(ostart+litHeaderSize, maxDstSize-litHeaderSize, src, srcSize);
-
-    if ((hsize==0) || (hsize >= srcSize - minGain)) return ZSTD_compressRawLiteralsBlock(dst, maxDstSize, src, srcSize);
-    if (hsize==1) return ZSTD_compressRleLiteralsBlock(dst, maxDstSize, src, srcSize);
-
-    /* Build header */
-    {
-        ostart[0]  = (BYTE)(srcSize << 2); /* is a block, is compressed */
-        ostart[1]  = (BYTE)(srcSize >> 6);
-        ostart[2]  = (BYTE)(srcSize >>14);
-        ostart[2] += (BYTE)(hsize << 5);
-        ostart[3]  = (BYTE)(hsize >> 3);
-        ostart[4]  = (BYTE)(hsize >>11);
-    }
-
-    return hsize+litHeaderSize;
-}
-
-
-size_t ZSTD_compressSequences(BYTE* dst, size_t maxDstSize,
-                        const seqStore_t* seqStorePtr,
-                              size_t srcSize)
-{
-    U32 count[MaxSeq+1];
-    S16 norm[MaxSeq+1];
-    size_t mostFrequent;
-    U32 max = 255;
-    U32 tableLog = 11;
-    U32 CTable_LitLength  [FSE_CTABLE_SIZE_U32(LLFSELog, MaxLL )];
-    U32 CTable_OffsetBits [FSE_CTABLE_SIZE_U32(OffFSELog,MaxOff)];
-    U32 CTable_MatchLength[FSE_CTABLE_SIZE_U32(MLFSELog, MaxML )];
-    U32 LLtype, Offtype, MLtype;   /* compressed, raw or rle */
-    const BYTE* const op_lit_start = seqStorePtr->litStart;
-    const BYTE* const llTable = seqStorePtr->litLengthStart;
-    const BYTE* const llPtr = seqStorePtr->litLength;
-    const BYTE* const mlTable = seqStorePtr->matchLengthStart;
-    const U32*  const offsetTable = seqStorePtr->offsetStart;
-    BYTE* const offCodeTable = seqStorePtr->offCodeStart;
-    BYTE* op = dst;
-    BYTE* const oend = dst + maxDstSize;
-    const size_t nbSeq = llPtr - llTable;
-    const size_t minGain = ZSTD_minGain(srcSize);
-    const size_t maxCSize = srcSize - minGain;
-    BYTE* seqHead;
-
-
-    /* Compress literals */
-    {
-        size_t cSize;
-        size_t litSize = seqStorePtr->lit - op_lit_start;
-
-        if (litSize <= LITERAL_NOENTROPY)
-            cSize = ZSTD_compressRawLiteralsBlock(op, maxDstSize, op_lit_start, litSize);
-        else
-            cSize = ZSTD_compressLiterals(op, maxDstSize, op_lit_start, litSize);
-        if (ZSTD_isError(cSize)) return cSize;
-        op += cSize;
-    }
-
-    /* Sequences Header */
-    if ((oend-op) < MIN_SEQUENCES_SIZE)
-        return ERROR(dstSize_tooSmall);
-    MEM_writeLE16(op, (U16)nbSeq); op+=2;
-    seqHead = op;
-
-    /* dumps : contains too large lengths */
-    {
-        size_t dumpsLength = seqStorePtr->dumps - seqStorePtr->dumpsStart;
-        if (dumpsLength < 512)
-        {
-            op[0] = (BYTE)(dumpsLength >> 8);
-            op[1] = (BYTE)(dumpsLength);
-            op += 2;
-        }
-        else
-        {
-            op[0] = 2;
-            op[1] = (BYTE)(dumpsLength>>8);
-            op[2] = (BYTE)(dumpsLength);
-            op += 3;
-        }
-        if ((size_t)(oend-op) < dumpsLength+6) return ERROR(dstSize_tooSmall);
-        memcpy(op, seqStorePtr->dumpsStart, dumpsLength);
-        op += dumpsLength;
-    }
-
-    /* CTable for Literal Lengths */
-    max = MaxLL;
-    mostFrequent = FSE_countFast(count, &max, seqStorePtr->litLengthStart, nbSeq);
-    if ((mostFrequent == nbSeq) && (nbSeq > 2))
-    {
-        *op++ = *(seqStorePtr->litLengthStart);
-        FSE_buildCTable_rle(CTable_LitLength, (BYTE)max);
-        LLtype = bt_rle;
-    }
-    else if ((nbSeq < 64) || (mostFrequent < (nbSeq >> (LLbits-1))))
-    {
-        FSE_buildCTable_raw(CTable_LitLength, LLbits);
-        LLtype = bt_raw;
-    }
-    else
-    {
-        size_t NCountSize;
-        tableLog = FSE_optimalTableLog(LLFSELog, nbSeq, max);
-        FSE_normalizeCount(norm, tableLog, count, nbSeq, max);
-        NCountSize = FSE_writeNCount(op, oend-op, norm, max, tableLog);   /* overflow protected */
-        if (FSE_isError(NCountSize)) return ERROR(GENERIC);
-        op += NCountSize;
-        FSE_buildCTable(CTable_LitLength, norm, max, tableLog);
-        LLtype = bt_compressed;
-    }
-
-    /* CTable for Offsets codes */
-    {
-        /* create Offset codes */
-        size_t i;
-        max = MaxOff;
-        for (i=0; i<nbSeq; i++)
-        {
-            offCodeTable[i] = (BYTE)ZSTD_highbit(offsetTable[i]) + 1;
-            if (offsetTable[i]==0) offCodeTable[i]=0;
-        }
-        mostFrequent = FSE_countFast(count, &max, offCodeTable, nbSeq);
-    }
-    if ((mostFrequent == nbSeq) && (nbSeq > 2))
-    {
-        *op++ = *offCodeTable;
-        FSE_buildCTable_rle(CTable_OffsetBits, (BYTE)max);
-        Offtype = bt_rle;
-    }
-    else if ((nbSeq < 64) || (mostFrequent < (nbSeq >> (Offbits-1))))
-    {
-        FSE_buildCTable_raw(CTable_OffsetBits, Offbits);
-        Offtype = bt_raw;
-    }
-    else
-    {
-        size_t NCountSize;
-        tableLog = FSE_optimalTableLog(OffFSELog, nbSeq, max);
-        FSE_normalizeCount(norm, tableLog, count, nbSeq, max);
-        NCountSize = FSE_writeNCount(op, oend-op, norm, max, tableLog);   /* overflow protected */
-        if (FSE_isError(NCountSize)) return ERROR(GENERIC);
-        op += NCountSize;
-        FSE_buildCTable(CTable_OffsetBits, norm, max, tableLog);
-        Offtype = bt_compressed;
-    }
-
-    /* CTable for MatchLengths */
-    max = MaxML;
-    mostFrequent = FSE_countFast(count, &max, seqStorePtr->matchLengthStart, nbSeq);
-    if ((mostFrequent == nbSeq) && (nbSeq > 2))
-    {
-        *op++ = *seqStorePtr->matchLengthStart;
-        FSE_buildCTable_rle(CTable_MatchLength, (BYTE)max);
-        MLtype = bt_rle;
-    }
-    else if ((nbSeq < 64) || (mostFrequent < (nbSeq >> (MLbits-1))))
-    {
-        FSE_buildCTable_raw(CTable_MatchLength, MLbits);
-        MLtype = bt_raw;
-    }
-    else
-    {
-        size_t NCountSize;
-        tableLog = FSE_optimalTableLog(MLFSELog, nbSeq, max);
-        FSE_normalizeCount(norm, tableLog, count, nbSeq, max);
-        NCountSize = FSE_writeNCount(op, oend-op, norm, max, tableLog);   /* overflow protected */
-        if (FSE_isError(NCountSize)) return ERROR(GENERIC);
-        op += NCountSize;
-        FSE_buildCTable(CTable_MatchLength, norm, max, tableLog);
-        MLtype = bt_compressed;
-    }
-
-    seqHead[0] += (BYTE)((LLtype<<6) + (Offtype<<4) + (MLtype<<2));
-
-    /* Encoding Sequences */
-    {
-        size_t streamSize, errorCode;
-        BIT_CStream_t blockStream;
-        FSE_CState_t stateMatchLength;
-        FSE_CState_t stateOffsetBits;
-        FSE_CState_t stateLitLength;
-        int i;
-
-        errorCode = BIT_initCStream(&blockStream, op, oend-op);
-        if (ERR_isError(errorCode)) return ERROR(dstSize_tooSmall);   /* not enough space remaining */
-        FSE_initCState(&stateMatchLength, CTable_MatchLength);
-        FSE_initCState(&stateOffsetBits, CTable_OffsetBits);
-        FSE_initCState(&stateLitLength, CTable_LitLength);
-
-        for (i=(int)nbSeq-1; i>=0; i--)
-        {
-            BYTE matchLength = mlTable[i];
-            U32  offset = offsetTable[i];
-            BYTE offCode = offCodeTable[i];                                 /* 32b*/  /* 64b*/
-            U32 nbBits = (offCode-1) * (!!offCode);
-            BYTE litLength = llTable[i];                                    /* (7)*/  /* (7)*/
-            FSE_encodeSymbol(&blockStream, &stateMatchLength, matchLength); /* 17 */  /* 17 */
-            if (MEM_32bits()) BIT_flushBits(&blockStream);                 /*  7 */
-            BIT_addBits(&blockStream, offset, nbBits);                      /* 32 */  /* 42 */
-            if (MEM_32bits()) BIT_flushBits(&blockStream);                 /*  7 */
-            FSE_encodeSymbol(&blockStream, &stateOffsetBits, offCode);      /* 16 */  /* 51 */
-            FSE_encodeSymbol(&blockStream, &stateLitLength, litLength);     /* 26 */  /* 61 */
-            BIT_flushBits(&blockStream);                                    /*  7 */  /*  7 */
-        }
-
-        FSE_flushCState(&blockStream, &stateMatchLength);
-        FSE_flushCState(&blockStream, &stateOffsetBits);
-        FSE_flushCState(&blockStream, &stateLitLength);
-
-        streamSize = BIT_closeCStream(&blockStream);
-        if (streamSize==0) return ERROR(dstSize_tooSmall);   /* not enough space */
-        op += streamSize;
-    }
-
-    /* check compressibility */
-    if ((size_t)(op-dst) >= maxCSize) return 0;
-
-    return op - dst;
-}
-
-
-//static const U32 hashMask = (1<<HASH_LOG)-1;
-
-//static U32   ZSTD_hashPtr(const void* p) { return (U32) _bextr_u64(*(U64*)p * prime7bytes, (56-HASH_LOG), HASH_LOG); }
-//static U32   ZSTD_hashPtr(const void* p) { return ( (*(U64*)p * prime7bytes) << 8 >> (64-HASH_LOG)); }
-//static U32   ZSTD_hashPtr(const void* p) { return ( (*(U64*)p * prime7bytes) >> (56-HASH_LOG)) & ((1<<HASH_LOG)-1); }
-//static U32   ZSTD_hashPtr(const void* p) { return ( ((*(U64*)p & 0xFFFFFFFFFFFFFF) * prime7bytes) >> (64-HASH_LOG)); }
-
-//static const U64 prime8bytes = 14923729446516375013ULL;
-//static U32   ZSTD_hashPtr(const void* p) { return ( (*(U64*)p * prime8bytes) >> (64-HASH_LOG)); }
-
-static const U64 prime7bytes =    58295818150454627ULL;
-static U32   ZSTD_hashPtr(const void* p) { return ( (MEM_read64(p) * prime7bytes) >> (56-HASH_LOG)) & HASH_MASK; }
-
-//static const U64 prime6bytes =      227718039650203ULL;
-//static U32   ZSTD_hashPtr(const void* p) { return ( (MEM_read64(p) * prime6bytes) >> (48-HASH_LOG)) & HASH_MASK; }
-
-//static const U64 prime5bytes =         889523592379ULL;
-//static U32   ZSTD_hashPtr(const void* p) { return ( (*(U64*)p * prime5bytes) >> (40-HASH_LOG)) & HASH_MASK; }
-
-//static U32   ZSTD_hashPtr(const void* p) { return ( (*(U32*)p * KNUTH) >> (32-HASH_LOG)); }
-
-static const BYTE* ZSTD_updateMatch(U32* table, const BYTE* p, const BYTE* start)
-{
-    U32 h = ZSTD_hashPtr(p);
-    const BYTE* r;
-    r = table[h] + start;
-    table[h] = (U32)(p-start);
-    return r;
-}
-
-static int ZSTD_checkMatch(const BYTE* match, const BYTE* ip)
-{
-    return MEM_read32(match) == MEM_read32(ip);
-}
-
-static void  ZSTD_addPtr(U32* table, const BYTE* p, const BYTE* start) { table[ZSTD_hashPtr(p)] = (U32)(p-start); }
-
-
-static size_t ZSTD_compressBlock(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    U32*  HashTable = (U32*)(ctx->hashTable);
-    seqStore_t* seqStorePtr = &(ctx->seqStore);
-    const BYTE* const base = ctx->base;
-
-    const BYTE* const istart = (const BYTE*)src;
-    const BYTE* ip = istart + 1;
-    const BYTE* anchor = istart;
-    const BYTE* const iend = istart + srcSize;
-    const BYTE* const ilimit = iend - 8;
-
-    size_t offset_2=4, offset_1=4;
-
-
-    /* init */
-    if (ip-base < 4)
-    {
-        ZSTD_addPtr(HashTable, ip+0, base);
-        ZSTD_addPtr(HashTable, ip+1, base);
-        ZSTD_addPtr(HashTable, ip+2, base);
-        ZSTD_addPtr(HashTable, ip+3, base);
-        ip += 4;
-    }
-    ZSTD_resetSeqStore(seqStorePtr);
-
-    /* Main Search Loop */
-    while (ip < ilimit)  /* < instead of <=, because unconditionnal ZSTD_addPtr(ip+1) */
-    {
-        const BYTE* match = ZSTD_updateMatch(HashTable, ip, base);
-
-        if (ZSTD_checkMatch(ip-offset_2,ip)) match = ip-offset_2;
-        if (!ZSTD_checkMatch(match,ip)) { ip += ((ip-anchor) >> g_searchStrength) + 1; offset_2 = offset_1; continue; }
-        while ((ip>anchor) && (match>base) && (ip[-1] == match[-1])) { ip--; match--; }  /* catch up */
-
-        {
-            size_t litLength = ip-anchor;
-            size_t matchLength = ZSTD_count(ip+MINMATCH, match+MINMATCH, iend);
-            size_t offsetCode = ip-match;
-            if (offsetCode == offset_2) offsetCode = 0;
-            offset_2 = offset_1;
-            offset_1 = ip-match;
-            ZSTD_storeSeq(seqStorePtr, litLength, anchor, offsetCode, matchLength);
-
-            /* Fill Table */
-            ZSTD_addPtr(HashTable, ip+1, base);
-            ip += matchLength + MINMATCH;
-            anchor = ip;
-            if (ip < ilimit) /* same test as loop, for speed */
-                ZSTD_addPtr(HashTable, ip-2, base);
-        }
-    }
-
-    /* Last Literals */
-    {
-        size_t lastLLSize = iend - anchor;
-        memcpy(seqStorePtr->lit, anchor, lastLLSize);
-        seqStorePtr->lit += lastLLSize;
-    }
-
-    /* Finale compression stage */
-    return ZSTD_compressSequences((BYTE*)dst, maxDstSize,
-                                  seqStorePtr, srcSize);
-}
-
-
-size_t ZSTD_compressBegin(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize)
-{
-    /* Sanity check */
-    if (maxDstSize < ZSTD_frameHeaderSize) return ERROR(dstSize_tooSmall);
-
-    /* Init */
-    ZSTD_resetCCtx(ctx);
-
-    /* Write Header */
-    MEM_writeLE32(dst, ZSTD_magicNumber);
-
-    return ZSTD_frameHeaderSize;
-}
-
-
-static void ZSTD_scaleDownCtx(ZSTD_CCtx* ctx, const U32 limit)
-{
-    int i;
-
-#if defined(__AVX2__)
-    /* AVX2 version */
-    __m256i* h = ctx->hashTable;
-    const __m256i limit8 = _mm256_set1_epi32(limit);
-    for (i=0; i<(HASH_TABLESIZE>>3); i++)
-    {
-        __m256i src =_mm256_loadu_si256((const __m256i*)(h+i));
-  const __m256i dec = _mm256_min_epu32(src, limit8);
-                src = _mm256_sub_epi32(src, dec);
-        _mm256_storeu_si256((__m256i*)(h+i), src);
-    }
-#else
-    /* this should be auto-vectorized by compiler */
-    U32* h = ctx->hashTable;
-    for (i=0; i<HASH_TABLESIZE; ++i)
-    {
-        U32 dec;
-        if (h[i] > limit) dec = limit; else dec = h[i];
-        h[i] -= dec;
-    }
-#endif
-}
-
-
-static void ZSTD_limitCtx(ZSTD_CCtx* ctx, const U32 limit)
-{
-    int i;
-
-    if (limit > g_maxLimit)
-    {
-        ZSTD_scaleDownCtx(ctx, limit);
-        ctx->base += limit;
-        ctx->current -= limit;
-        ctx->nextUpdate -= limit;
-        return;
-    }
-
-#if defined(__AVX2__)
-    /* AVX2 version */
-    {
-        __m256i* h = ctx->hashTable;
-        const __m256i limit8 = _mm256_set1_epi32(limit);
-        //printf("Address h : %0X\n", (U32)h);    // address test
-        for (i=0; i<(HASH_TABLESIZE>>3); i++)
-        {
-            __m256i src =_mm256_loadu_si256((const __m256i*)(h+i));   // Unfortunately, clang doesn't guarantee 32-bytes alignment
-                    src = _mm256_max_epu32(src, limit8);
-            _mm256_storeu_si256((__m256i*)(h+i), src);
-        }
-    }
-#else
-    /* this should be auto-vectorized by compiler */
-    {
-        U32* h = (U32*)(ctx->hashTable);
-        for (i=0; i<HASH_TABLESIZE; ++i)
-        {
-            if (h[i] < limit) h[i] = limit;
-        }
-    }
-#endif
-}
-
-
-size_t ZSTD_compressContinue(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    const BYTE* const istart = (const BYTE* const)src;
-    const BYTE* ip = istart;
-    BYTE* const ostart = (BYTE* const)dst;
-    BYTE* op = ostart;
-    const U32 updateRate = 2 * BLOCKSIZE;
-
-    /*  Init */
-    if (ctx->base==NULL)
-        ctx->base = (const BYTE*)src, ctx->current=0, ctx->nextUpdate = g_maxDistance;
-    if (src != ctx->base + ctx->current)   /* not contiguous */
-    {
-        ZSTD_resetCCtx(ctx);
-        ctx->base = (const BYTE*)src;
-        ctx->current = 0;
-    }
-    ctx->current += (U32)srcSize;
-
-    while (srcSize)
-    {
-        size_t cSize;
-        size_t blockSize = BLOCKSIZE;
-        if (blockSize > srcSize) blockSize = srcSize;
-
-        if (maxDstSize < 2*ZSTD_blockHeaderSize+1)  /* one RLE block + endMark */
-            return ERROR(dstSize_tooSmall);
-
-        /* update hash table */
-        if (g_maxDistance <= BLOCKSIZE)   /* static test ; yes == blocks are independent */
-        {
-            ZSTD_resetCCtx(ctx);
-            ctx->base = ip;
-            ctx->current=0;
-        }
-        else if (ip >= ctx->base + ctx->nextUpdate)
-        {
-            ctx->nextUpdate += updateRate;
-            ZSTD_limitCtx(ctx, ctx->nextUpdate - g_maxDistance);
-        }
-
-        /* compress */
-        cSize = ZSTD_compressBlock(ctx, op+ZSTD_blockHeaderSize, maxDstSize-ZSTD_blockHeaderSize, ip, blockSize);
-        if (cSize == 0)
-        {
-            cSize = ZSTD_noCompressBlock(op, maxDstSize, ip, blockSize);   /* block is not compressible */
-            if (ZSTD_isError(cSize)) return cSize;
-        }
-        else
-        {
-            if (ZSTD_isError(cSize)) return cSize;
-            op[0] = (BYTE)(cSize>>16);
-            op[1] = (BYTE)(cSize>>8);
-            op[2] = (BYTE)cSize;
-            op[0] += (BYTE)(bt_compressed << 6); /* is a compressed block */
-            cSize += 3;
-        }
-        op += cSize;
-        maxDstSize -= cSize;
-        ip += blockSize;
-        srcSize -= blockSize;
-    }
-
-    return op-ostart;
-}
-
-
-size_t ZSTD_compressEnd(ZSTD_CCtx*  ctx, void* dst, size_t maxDstSize)
-{
-    BYTE* op = (BYTE*)dst;
-
-    /* Sanity check */
-    (void)ctx;
-    if (maxDstSize < ZSTD_blockHeaderSize) return ERROR(dstSize_tooSmall);
-
-    /* End of frame */
-    op[0] = (BYTE)(bt_end << 6);
-    op[1] = 0;
-    op[2] = 0;
-
-    return 3;
-}
-
-
-size_t ZSTD_compressCCtx(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    BYTE* const ostart = (BYTE* const)dst;
-    BYTE* op = ostart;
-    size_t oSize;
-
-    /* Header */
-    oSize = ZSTD_compressBegin(ctx, dst, maxDstSize);
-    if(ZSTD_isError(oSize)) return oSize;
-    op += oSize;
-    maxDstSize -= oSize;
-
-    /* Compression */
-    oSize = ZSTD_compressContinue(ctx, op, maxDstSize, src, srcSize);
-    if (ZSTD_isError(oSize)) return oSize;
-    op += oSize;
-    maxDstSize -= oSize;
-
-    /* Close frame */
-    oSize = ZSTD_compressEnd(ctx, op, maxDstSize);
-    if(ZSTD_isError(oSize)) return oSize;
-    op += oSize;
-
-    return (op - ostart);
-}
-
-
-size_t ZSTD_compress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    size_t r;
-#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1)
-    ZSTD_CCtx* ctx;
-    ctx = ZSTD_createCCtx();
-    if (ctx==NULL) return ERROR(GENERIC);
-# else
-    ZSTD_CCtx ctxBody;
-    ZSTD_CCtx* const ctx = &ctxBody;
-# endif
-
-    r = ZSTD_compressCCtx(ctx, dst, maxDstSize, src, srcSize);
-
-#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1)
-    ZSTD_freeCCtx(ctx);
-#endif
-
-    return r;
-}
-
-
-/* *************************************************************
-*   Decompression section
-***************************************************************/
-struct ZSTD_DCtx_s
-{
-    U32 LLTable[FSE_DTABLE_SIZE_U32(LLFSELog)];
-    U32 OffTable[FSE_DTABLE_SIZE_U32(OffFSELog)];
-    U32 MLTable[FSE_DTABLE_SIZE_U32(MLFSELog)];
-    void* previousDstEnd;
-    void* base;
-    size_t expected;
-    blockType_t bType;
-    U32 phase;
-    const BYTE* litPtr;
-    size_t litBufSize;
-    size_t litSize;
-    BYTE litBuffer[BLOCKSIZE + 8 /* margin for wildcopy */];
-};   /* typedef'd to ZSTD_Dctx within "zstd_static.h" */
-
-
-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_copyUncompressedBlock(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 )*/
-size_t ZSTD_decodeLiteralsBlock(void* ctx,
-                          const void* src, size_t srcSize)   /* note : srcSize < BLOCKSIZE */
-{
-    ZSTD_DCtx* dctx = (ZSTD_DCtx*)ctx;
-    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->litBufSize = BLOCKSIZE+8;
-            dctx->litSize = litSize;
-            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->litBufSize = BLOCKSIZE+8;
-                dctx->litSize = litSize;
-                return litSize+3;
-            }
-            /* direct reference into compressed stream */
-            dctx->litPtr = istart+3;
-            dctx->litBufSize = srcSize-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);
-            dctx->litPtr = dctx->litBuffer;
-            dctx->litBufSize = BLOCKSIZE+8;
-            dctx->litSize = litSize;
-            return 4;
-        }
-    default:
-        return ERROR(corruption_detected);   /* forbidden nominal case */
-    }
-}
-
-
-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 and MaxOff */
-        size_t headerSize;
-
-        /* Build DTables */
-        switch(LLtype)
-        {
-        U32 max;
-        case bt_rle :
-            LLlog = 0;
-            FSE_buildDTable_rle(DTableLL, *ip++); break;
-        case bt_raw :
-            LLlog = LLbits;
-            FSE_buildDTable_raw(DTableLL, LLbits); break;
-        default :
-            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)
-        {
-        U32 max;
-        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 :
-            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)
-        {
-        U32 max;
-        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 :
-            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;
-    seqState->prevOffset = seq->offset;
-    if (litLength == MaxLL)
-    {
-        U32 add = *dumps++;
-        if (add < 255) litLength += add;
-        else
-        {
-            litLength = MEM_readLE32(dumps) & 0xFFFFFF;  /* no pb : dumps is always followed by seq tables > 1 byte */
-            dumps += 3;
-        }
-        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 */
-    }
-
-    /* MatchLength */
-    matchLength = FSE_decodeSymbol(&(seqState->stateML), &(seqState->DStream));
-    if (matchLength == MaxML)
-    {
-        U32 add = *dumps++;
-        if (add < 255) matchLength += add;
-        else
-        {
-            matchLength = MEM_readLE32(dumps) & 0xFFFFFF;  /* no pb : dumps is always followed by seq tables > 1 byte */
-            dumps += 3;
-        }
-        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,
-                                seq_t sequence,
-                                const BYTE** litPtr, const BYTE* const litLimit_8,
-                                BYTE* const base, BYTE* const oend)
-{
-    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};   /* substracted */
-    const BYTE* const ostart = op;
-    BYTE* const oLitEnd = op + sequence.litLength;
-    BYTE* const oMatchEnd = op + sequence.litLength + sequence.matchLength;   /* risk : address space overflow (32-bits) */
-    BYTE* const oend_8 = oend-8;
-    const BYTE* const litEnd = *litPtr + sequence.litLength;
-
-    /* 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_8) 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 */
-    {
-        const BYTE* match = op - sequence.offset;
-
-        /* check */
-        //if (match > op) return ERROR(corruption_detected);   /* address space overflow test (is clang optimizer removing this test ?) */
-        if (sequence.offset > (size_t)op) return ERROR(corruption_detected);   /* address space overflow test (this test seems kept by clang optimizer) */
-        if (match < base) return ERROR(corruption_detected);
-
-        /* close range match, overlap */
-        if (sequence.offset < 8)
-        {
-            const int dec64 = 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 -= dec64;
-        }
-        else
-        {
-            ZSTD_copy8(op, match);
-        }
-        op += 8; match += 8;
-
-        if (oMatchEnd > oend-12)
-        {
-            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, sequence.matchLength-8);   /* works even if matchLength < 8 */
-        }
-    }
-
-    return oMatchEnd - ostart;
-}
-
-static size_t ZSTD_decompressSequences(
-                               void* ctx,
-                               void* dst, size_t maxDstSize,
-                         const void* seqStart, size_t seqSize)
-{
-    ZSTD_DCtx* dctx = (ZSTD_DCtx*)ctx;
-    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 litLimit_8 = litPtr + dctx->litBufSize - 8;
-    const BYTE* const litEnd = litPtr + dctx->litSize;
-    int nbSeq;
-    const BYTE* dumps;
-    U32* DTableLL = dctx->LLTable;
-    U32* DTableML = dctx->MLTable;
-    U32* DTableOffb = dctx->OffTable;
-    BYTE* const base = (BYTE*) (dctx->base);
-
-    /* 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>0) ; )
-        {
-            size_t oneSeqSize;
-            nbSeq--;
-            ZSTD_decodeSequence(&sequence, &seqState);
-            oneSeqSize = ZSTD_execSequence(op, sequence, &litPtr, litLimit_8, base, oend);
-            if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
-            op += oneSeqSize;
-        }
-
-        /* check if reached exact end */
-        if ( !BIT_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected);   /* requested too much : data is corrupted */
-        if (nbSeq<0) return ERROR(corruption_detected);   /* requested too many sequences : 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 size_t ZSTD_decompressBlock(
-                            void* ctx,
-                            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(ctx, src, srcSize);
-    if (ZSTD_isError(litCSize)) return litCSize;
-    ip += litCSize;
-    srcSize -= litCSize;
-
-    return ZSTD_decompressSequences(ctx, dst, maxDstSize, ip, srcSize);
-}
-
-
-static size_t ZSTD_decompressDCtx(void* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    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;
-    U32 magicNumber;
-    blockProperties_t blockProperties;
-
-    /* Frame Header */
-    if (srcSize < ZSTD_frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
-    magicNumber = MEM_readLE32(src);
-#if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1)
-    if (ZSTD_isLegacy(magicNumber))
-        return ZSTD_decompressLegacy(dst, maxDstSize, src, srcSize, magicNumber);
-#endif
-    if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown);
-    ip += ZSTD_frameHeaderSize; remainingSize -= ZSTD_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(ctx, op, oend-op, ip, cBlockSize);
-            break;
-        case bt_raw :
-            decodedSize = ZSTD_copyUncompressedBlock(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;
-}
-
-size_t ZSTD_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-    ZSTD_DCtx ctx;
-    ctx.base = dst;
-    return ZSTD_decompressDCtx(&ctx, dst, maxDstSize, src, srcSize);
-}
-
-
-/* ******************************
-*  Streaming Decompression API
-********************************/
-
-size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx)
-{
-    dctx->expected = ZSTD_frameHeaderSize;
-    dctx->phase = 0;
-    dctx->previousDstEnd = NULL;
-    dctx->base = NULL;
-    return 0;
-}
-
-ZSTD_DCtx* ZSTD_createDCtx(void)
-{
-    ZSTD_DCtx* dctx = (ZSTD_DCtx*)malloc(sizeof(ZSTD_DCtx));
-    if (dctx==NULL) return NULL;
-    ZSTD_resetDCtx(dctx);
-    return dctx;
-}
-
-size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx)
-{
-    free(dctx);
-    return 0;
-}
-
-size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx)
-{
-    return dctx->expected;
-}
-
-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);
-    if (dst != ctx->previousDstEnd)  /* not contiguous */
-        ctx->base = dst;
-
-    /* Decompress : frame header */
-    if (ctx->phase == 0)
-    {
-        /* Check frame magic header */
-        U32 magicNumber = MEM_readLE32(src);
-        if (magicNumber != ZSTD_magicNumber) return ERROR(prefix_unknown);
-        ctx->phase = 1;
-        ctx->expected = ZSTD_blockHeaderSize;
-        return 0;
-    }
-
-    /* Decompress : block header */
-    if (ctx->phase == 1)
-    {
-        blockProperties_t bp;
-        size_t blockSize = ZSTD_getcBlockSize(src, ZSTD_blockHeaderSize, &bp);
-        if (ZSTD_isError(blockSize)) return blockSize;
-        if (bp.blockType == bt_end)
-        {
-            ctx->expected = 0;
-            ctx->phase = 0;
-        }
-        else
-        {
-            ctx->expected = blockSize;
-            ctx->bType = bp.blockType;
-            ctx->phase = 2;
-        }
-
-        return 0;
-    }
-
-    /* Decompress : block content */
-    {
-        size_t rSize;
-        switch(ctx->bType)
-        {
-        case bt_compressed:
-            rSize = ZSTD_decompressBlock(ctx, dst, maxDstSize, src, srcSize);
-            break;
-        case bt_raw :
-            rSize = ZSTD_copyUncompressedBlock(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->phase = 1;
-        ctx->expected = ZSTD_blockHeaderSize;
-        ctx->previousDstEnd = (void*)( ((char*)dst) + rSize);
-        return rSize;
-    }
-
-}
-
-

lib/zstd.h

@@ -43,25 +43,39 @@ extern "C" {
 #include <stddef.h>   /* size_t */
 
 
+/* ***************************************************************
+*  Tuning parameters
+*****************************************************************/
+/*!
+*  ZSTD_DLL_EXPORT :
+*  Enable exporting of functions when building a Windows DLL
+*/
+#if defined(_WIN32) && defined(ZSTD_DLL_EXPORT) && (ZSTD_DLL_EXPORT==1)
+#  define ZSTDLIB_API __declspec(dllexport)
+#else
+#  define ZSTDLIB_API
+#endif
+
+
 /* *************************************
 *  Version
 ***************************************/
 #define ZSTD_VERSION_MAJOR    0    /* for breaking interface changes  */
 #define ZSTD_VERSION_MINOR    4    /* for new (non-breaking) interface capabilities */
-#define ZSTD_VERSION_RELEASE  0    /* for tweaks, bug-fixes, or development */
+#define ZSTD_VERSION_RELEASE  5    /* for tweaks, bug-fixes, or development */
 #define ZSTD_VERSION_NUMBER  (ZSTD_VERSION_MAJOR *100*100 + ZSTD_VERSION_MINOR *100 + ZSTD_VERSION_RELEASE)
-unsigned ZSTD_versionNumber (void);
+ZSTDLIB_API unsigned ZSTD_versionNumber (void);
 
 
 /* *************************************
 *  Simple functions
 ***************************************/
-size_t ZSTD_compress(   void* dst, size_t maxDstSize,
+ZSTDLIB_API size_t ZSTD_compress(   void* dst, size_t maxDstSize,
-                  const void* src, size_t srcSize,
+                              const void* src, size_t srcSize,
-                         int  compressionLevel);
+                                     int  compressionLevel);
 
-size_t ZSTD_decompress( void* dst, size_t maxOriginalSize,
+ZSTDLIB_API size_t ZSTD_decompress( void* dst, size_t maxOriginalSize,
-                  const void* src, size_t compressedSize);
+                              const void* src, size_t compressedSize);
 
 /**
 ZSTD_compress() :
@@ -83,25 +97,25 @@ ZSTD_decompress() :
 /* *************************************
 *  Tool functions
 ***************************************/
-size_t      ZSTD_compressBound(size_t srcSize);   /** maximum compressed size (worst case scenario) */
+ZSTDLIB_API size_t      ZSTD_compressBound(size_t srcSize);   /** maximum compressed size (worst case scenario) */
 
 /* Error Management */
-unsigned    ZSTD_isError(size_t code);         /** tells if a return value is an error code */
+ZSTDLIB_API unsigned    ZSTD_isError(size_t code);         /** tells if a return value is an error code */
-const char* ZSTD_getErrorName(size_t code);    /** provides error code string */
+ZSTDLIB_API const char* ZSTD_getErrorName(size_t code);    /** provides error code string */
 
 
 /* *************************************
 *  Advanced functions
 ***************************************/
 typedef struct ZSTD_CCtx_s ZSTD_CCtx;   /* incomplete type */
-ZSTD_CCtx* ZSTD_createCCtx(void);
+ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx(void);
-size_t     ZSTD_freeCCtx(ZSTD_CCtx* cctx);
+ZSTDLIB_API size_t     ZSTD_freeCCtx(ZSTD_CCtx* cctx);
 
 /**
 ZSTD_compressCCtx() :
     Same as ZSTD_compress(), but requires a ZSTD_CCtx working space already allocated
 */
-size_t ZSTD_compressCCtx(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel);
+ZSTDLIB_API size_t ZSTD_compressCCtx(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel);
 
 
 #if defined (__cplusplus)

lib/zstd_buffered.c

@@ -160,6 +160,12 @@ size_t ZBUFF_compressInit(ZBUFF_CCtx* zbc, int compressionLevel)
 }
 
 
+ZSTDLIB_API size_t ZBUFF_compressWithDictionary(ZBUFF_CCtx* zbc, const void* src, size_t srcSize)
+{
+    ZSTD_compress_insertDictionary(zbc->zc, src, srcSize);
+    return 0;
+}
+
 
 /* *** Compression *** */
 
@@ -327,6 +333,8 @@ struct ZBUFF_DCtx_s {
     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" */
@@ -353,17 +361,23 @@ size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbc)
 }
 
 
-
 /* *** Initialization *** */
 
 size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbc)
 {
     zbc->stage = ZBUFFds_readHeader;
-    zbc->hPos = zbc->inPos = zbc->outStart = zbc->outEnd = 0;
+    zbc->hPos = zbc->inPos = zbc->outStart = zbc->outEnd = zbc->dictSize = 0;
     return ZSTD_resetDCtx(zbc->zc);
 }
 
 
+size_t ZBUFF_decompressWithDictionary(ZBUFF_DCtx* zbc, const void* src, size_t srcSize)
+{
+    zbc->dict = (const char*)src;
+    zbc->dictSize = srcSize;
+    return 0;
+}
+
 
 /* *** Decompression *** */
 
@@ -442,6 +456,8 @@ size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbc, void* dst, size_t* maxDstSizePt
                         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 */

lib/zstd_buffered.h

@@ -47,17 +47,32 @@ extern "C" {
 #include <stddef.h>   /* size_t */
 
 
+/* ***************************************************************
+*  Tuning parameters
+*****************************************************************/
+/*!
+*  ZSTD_DLL_EXPORT :
+*  Enable exporting of functions when building a Windows DLL
+*/
+#if defined(_WIN32) && defined(ZSTD_DLL_EXPORT) && (ZSTD_DLL_EXPORT==1)
+#  define ZSTDLIB_API __declspec(dllexport)
+#else
+#  define ZSTDLIB_API
+#endif
+
+
 /* *************************************
 *  Streaming functions
 ***************************************/
 typedef struct ZBUFF_CCtx_s ZBUFF_CCtx;
-ZBUFF_CCtx* ZBUFF_createCCtx(void);
+ZSTDLIB_API ZBUFF_CCtx* ZBUFF_createCCtx(void);
-size_t      ZBUFF_freeCCtx(ZBUFF_CCtx* cctx);
+ZSTDLIB_API size_t      ZBUFF_freeCCtx(ZBUFF_CCtx* cctx);
 
-size_t ZBUFF_compressInit(ZBUFF_CCtx* cctx, int compressionLevel);
+ZSTDLIB_API size_t ZBUFF_compressInit(ZBUFF_CCtx* cctx, int compressionLevel);
-size_t ZBUFF_compressContinue(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr);
+ZSTDLIB_API size_t ZBUFF_compressWithDictionary(ZBUFF_CCtx* cctx, const void* src, size_t srcSize);
-size_t ZBUFF_compressFlush(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr);
+ZSTDLIB_API size_t ZBUFF_compressContinue(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr);
-size_t ZBUFF_compressEnd(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr);
+ZSTDLIB_API size_t ZBUFF_compressFlush(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr);
+ZSTDLIB_API size_t ZBUFF_compressEnd(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr);
 
 /** ************************************************
 *  Streaming compression
@@ -67,6 +82,9 @@ size_t ZBUFF_compressEnd(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr);
 *  Use ZBUFF_compressInit() to start a new compression operation.
 *  ZBUFF_CCtx objects can be reused multiple times.
 *
+*  Optionally, a reference to a static dictionary can be created with ZBUFF_compressWithDictionary()
+*  Note that the dictionary content must remain accessible during the compression process.
+*
 *  Use ZBUFF_compressContinue() repetitively to consume input stream.
 *  *srcSizePtr and *maxDstSizePtr can be any size.
 *  The function will report how many bytes were read or written within *srcSizePtr and *maxDstSizePtr.
@@ -97,11 +115,13 @@ size_t ZBUFF_compressEnd(ZBUFF_CCtx* cctx, void* dst, size_t* maxDstSizePtr);
 
 
 typedef struct ZBUFF_DCtx_s ZBUFF_DCtx;
-ZBUFF_DCtx* ZBUFF_createDCtx(void);
+ZSTDLIB_API ZBUFF_DCtx* ZBUFF_createDCtx(void);
-size_t      ZBUFF_freeDCtx(ZBUFF_DCtx* dctx);
+ZSTDLIB_API size_t      ZBUFF_freeDCtx(ZBUFF_DCtx* dctx);
 
-size_t ZBUFF_decompressInit(ZBUFF_DCtx* dctx);
+ZSTDLIB_API size_t ZBUFF_decompressInit(ZBUFF_DCtx* dctx);
-size_t ZBUFF_decompressContinue(ZBUFF_DCtx* dctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr);
+ZSTDLIB_API size_t ZBUFF_decompressWithDictionary(ZBUFF_DCtx* dctx, const void* src, size_t srcSize);
+
+ZSTDLIB_API size_t ZBUFF_decompressContinue(ZBUFF_DCtx* dctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr);
 
 /** ************************************************
 *  Streaming decompression
@@ -111,6 +131,10 @@ size_t ZBUFF_decompressContinue(ZBUFF_DCtx* dctx, void* dst, size_t* maxDstSizeP
 *  Use ZBUFF_decompressInit() to start a new decompression operation.
 *  ZBUFF_DCtx objects can be reused multiple times.
 *
+*  Optionally, a reference to a static dictionary can be set, using ZBUFF_decompressWithDictionary()
+*  It must be the same content as the one set during compression phase.
+*  Dictionary content must remain accessible during the decompression process.
+*
 *  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.
@@ -129,15 +153,15 @@ size_t ZBUFF_decompressContinue(ZBUFF_DCtx* dctx, void* dst, size_t* maxDstSizeP
 /* *************************************
 *  Tool functions
 ***************************************/
-unsigned ZBUFF_isError(size_t errorCode);
+ZSTDLIB_API unsigned ZBUFF_isError(size_t errorCode);
-const char* ZBUFF_getErrorName(size_t errorCode);
+ZSTDLIB_API const char* ZBUFF_getErrorName(size_t errorCode);
 
 /** The below functions provide recommended buffer sizes for Compression or Decompression operations.
 *   These sizes are not compulsory, they just tend to offer better latency */
-size_t ZBUFF_recommendedCInSize(void);
+ZSTDLIB_API size_t ZBUFF_recommendedCInSize(void);
-size_t ZBUFF_recommendedCOutSize(void);
+ZSTDLIB_API size_t ZBUFF_recommendedCOutSize(void);
-size_t ZBUFF_recommendedDInSize(void);
+ZSTDLIB_API size_t ZBUFF_recommendedDInSize(void);
-size_t ZBUFF_recommendedDOutSize(void);
+ZSTDLIB_API size_t ZBUFF_recommendedDOutSize(void);
 
 
 #if defined (__cplusplus)

lib/zstd_buffered_static.h

@@ -52,7 +52,7 @@ extern "C" {
 /* *************************************
 *  Advanced Streaming functions
 ***************************************/
-size_t ZBUFF_compressInit_advanced(ZBUFF_CCtx* cctx, ZSTD_parameters params);
+ZSTDLIB_API size_t ZBUFF_compressInit_advanced(ZBUFF_CCtx* cctx, ZSTD_parameters params);
 
 
 #if defined (__cplusplus)

lib/zstd_compress.c

@@ -65,6 +65,7 @@
 /* *************************************
 *  Constants
 ***************************************/
+unsigned ZSTD_maxCLevel(void) { return ZSTD_MAX_CLEVEL; }
 static const U32 g_searchStrength = 8;
 
 
@@ -100,8 +101,6 @@ static void ZSTD_resetSeqStore(seqStore_t* ssPtr)
 /* *************************************
 *  Context memory management
 ***************************************/
-#define WORKPLACESIZE (BLOCKSIZE*3)
-
 struct ZSTD_CCtx_s
 {
     const BYTE* nextSrc;    /* next block here to continue on current prefix */
@@ -113,6 +112,7 @@ struct ZSTD_CCtx_s
     ZSTD_parameters params;
     void* workSpace;
     size_t workSpaceSize;
+    size_t blockSize;
 
     seqStore_t seqStore;    /* sequences storage ptrs */
     U32* hashTable;
@@ -170,11 +170,14 @@ void ZSTD_validateParams(ZSTD_parameters* params)
 static size_t ZSTD_resetCCtx_advanced (ZSTD_CCtx* zc,
                                        ZSTD_parameters params)
 {
+    /* note : params considered validated here */
+    const size_t blockSize = MIN(BLOCKSIZE, (size_t)1 << params.windowLog);
+
     /* reserve table memory */
     {
         const U32 contentLog = (params.strategy == ZSTD_fast) ? 1 : params.contentLog;
         const size_t tableSpace = ((1 << contentLog) + (1 << params.hashLog)) * sizeof(U32);
-        const size_t neededSpace = tableSpace + WORKPLACESIZE;
+        const size_t neededSpace = tableSpace + (3*blockSize);
         if (zc->workSpaceSize < neededSpace)
         {
             free(zc->workSpace);
@@ -195,12 +198,13 @@ static size_t ZSTD_resetCCtx_advanced (ZSTD_CCtx* zc,
     zc->dictLimit = 0;
     zc->lowLimit = 0;
     zc->params = params;
+    zc->blockSize = blockSize;
     zc->seqStore.offsetStart = (U32*) (zc->seqStore.buffer);
-    zc->seqStore.offCodeStart = (BYTE*) (zc->seqStore.offsetStart + (BLOCKSIZE>>2));
+    zc->seqStore.offCodeStart = (BYTE*) (zc->seqStore.offsetStart + (blockSize>>2));
-    zc->seqStore.litStart = zc->seqStore.offCodeStart + (BLOCKSIZE>>2);
+    zc->seqStore.litStart = zc->seqStore.offCodeStart + (blockSize>>2);
-    zc->seqStore.litLengthStart =  zc->seqStore.litStart + BLOCKSIZE;
+    zc->seqStore.litLengthStart =  zc->seqStore.litStart + blockSize;
-    zc->seqStore.matchLengthStart = zc->seqStore.litLengthStart + (BLOCKSIZE>>2);
+    zc->seqStore.matchLengthStart = zc->seqStore.litLengthStart + (blockSize>>2);
-    zc->seqStore.dumpsStart = zc->seqStore.matchLengthStart + (BLOCKSIZE>>2);
+    zc->seqStore.dumpsStart = zc->seqStore.matchLengthStart + (blockSize>>2);
 
     return 0;
 }
@@ -485,7 +489,7 @@ size_t ZSTD_compressSequences(void* dst, size_t maxDstSize,
             BYTE litLength = llTable[i];                                    /* (7)*/  /* (7)*/
             FSE_encodeSymbol(&blockStream, &stateMatchLength, matchLength); /* 17 */  /* 17 */
             if (MEM_32bits()) BIT_flushBits(&blockStream);                  /*  7 */
-            BIT_addBits(&blockStream, offset, nbBits);                      /* 32 */  /* 42 */
+            BIT_addBits(&blockStream, offset, nbBits);                      /* 31 */  /* 42 */   /* 24 bits max in 32-bits mode */
             if (MEM_32bits()) BIT_flushBits(&blockStream);                  /*  7 */
             FSE_encodeSymbol(&blockStream, &stateOffsetBits, offCode);      /* 16 */  /* 51 */
             FSE_encodeSymbol(&blockStream, &stateLitLength, litLength);     /* 26 */  /* 61 */
@@ -596,7 +600,7 @@ static unsigned ZSTD_NbCommonBytes (register size_t val)
 #       if defined(_MSC_VER) && defined(_WIN64)
             unsigned long r = 0;
             _BitScanForward64( &r, (U64)val );
-            return (int)(r>>3);
+            return (unsigned)(r>>3);
 #       elif defined(__GNUC__) && (__GNUC__ >= 3)
             return (__builtin_ctzll((U64)val) >> 3);
 #       else
@@ -609,7 +613,7 @@ static unsigned ZSTD_NbCommonBytes (register size_t val)
 #       if defined(_MSC_VER)
             unsigned long r=0;
             _BitScanForward( &r, (U32)val );
-            return (int)(r>>3);
+            return (unsigned)(r>>3);
 #       elif defined(__GNUC__) && (__GNUC__ >= 3)
             return (__builtin_ctz((U32)val) >> 3);
 #       else
@@ -620,7 +624,7 @@ static unsigned ZSTD_NbCommonBytes (register size_t val)
     }
     else   /* Big Endian CPU */
     {
-        if (MEM_32bits())
+        if (MEM_64bits())
         {
 #       if defined(_MSC_VER) && defined(_WIN64)
             unsigned long r = 0;
@@ -727,13 +731,30 @@ static size_t ZSTD_hashPtr(const void* p, U32 hBits, U32 mls)
 *  Fast Scan
 ***************************************/
 
+#define FILLHASHSTEP 3
+static void ZSTD_fillHashTable (ZSTD_CCtx* zc, const void* end, const U32 mls)
+{
+    U32* const hashTable = zc->hashTable;
+    const U32 hBits = zc->params.hashLog;
+    const BYTE* const base = zc->base;
+    const BYTE* ip = base + zc->nextToUpdate;
+    const BYTE* const iend = (const BYTE*) end;
+
+    while(ip <= iend)
+    {
+        hashTable[ZSTD_hashPtr(ip, hBits, mls)] = (U32)(ip - base);
+        ip += FILLHASHSTEP;
+    }
+}
+
+
 FORCE_INLINE
 size_t ZSTD_compressBlock_fast_generic(ZSTD_CCtx* zc,
                                        void* dst, size_t maxDstSize,
                                  const void* src, size_t srcSize,
                                  const U32 mls)
 {
-    U32* hashTable = zc->hashTable;
+    U32* const hashTable = zc->hashTable;
     const U32 hBits = zc->params.hashLog;
     seqStore_t* seqStorePtr = &(zc->seqStore);
     const BYTE* const base = zc->base;
@@ -749,12 +770,12 @@ size_t ZSTD_compressBlock_fast_generic(ZSTD_CCtx* zc,
 
     /* init */
     ZSTD_resetSeqStore(seqStorePtr);
-    if (ip < base+4)
+    if (ip < lowest+4)
     {
-        hashTable[ZSTD_hashPtr(base+1, hBits, mls)] = 1;
+        hashTable[ZSTD_hashPtr(lowest+1, hBits, mls)] = zc->dictLimit+1;
-        hashTable[ZSTD_hashPtr(base+2, hBits, mls)] = 2;
+        hashTable[ZSTD_hashPtr(lowest+2, hBits, mls)] = zc->dictLimit+2;
-        hashTable[ZSTD_hashPtr(base+3, hBits, mls)] = 3;
+        hashTable[ZSTD_hashPtr(lowest+3, hBits, mls)] = zc->dictLimit+3;
-        ip = base+4;
+        ip = lowest+4;
     }
 
     /* Main Search Loop */
@@ -1005,7 +1026,7 @@ static U32 ZSTD_insertBt1(ZSTD_CCtx* zc, const BYTE* const ip, const U32 mls, co
     size_t commonLengthSmaller=0, commonLengthLarger=0;
     const BYTE* const base = zc->base;
     const BYTE* match = base + matchIndex;
-    U32 current = (U32)(ip-base);
+    const U32 current = (U32)(ip-base);
     const U32 btLow = btMask >= current ? 0 : current - btMask;
     U32* smallerPtr = bt + 2*(current&btMask);
     U32* largerPtr  = bt + 2*(current&btMask) + 1;
@@ -1013,13 +1034,14 @@ static U32 ZSTD_insertBt1(ZSTD_CCtx* zc, const BYTE* const ip, const U32 mls, co
     const U32 windowLow = zc->lowLimit;
 
     if ( (current-matchIndex == 1)   /* RLE */
+        && (matchIndex > windowLow)
         && (MEM_read64(match) == MEM_read64(ip)) )
     {
         size_t rleLength = ZSTD_count(ip+8, match+8, iend) + 8;
         return (U32)(rleLength - mls);
     }
 
-    hashTable[h] = (U32)(ip - base);   /* Update Hash Table */
+    hashTable[h] = current;   /* Update Hash Table */
 
     while (nbCompares-- && (matchIndex > windowLow))
     {
@@ -1082,7 +1104,7 @@ size_t ZSTD_insertBtAndFindBestMatch (
     size_t bestLength = 0;
     U32 dummy32;   /* to be nullified at the end */
 
-    hashTable[h] = (U32)(ip-base);   /* Update Hash Table */
+    hashTable[h] = current;   /* Update Hash Table */
 
     while (nbCompares-- && (matchIndex > windowLow))
     {
@@ -1192,7 +1214,7 @@ static U32 ZSTD_insertBt1_extDict(ZSTD_CCtx* zc, const BYTE* const ip, const U32
     const BYTE* const dictEnd = dictBase + dictLimit;
     const BYTE* const prefixStart = base + dictLimit;
     const BYTE* match = base + matchIndex;
-    U32 current = (U32)(ip-base);
+    const U32 current = (U32)(ip-base);
     const U32 btLow = btMask >= current ? 0 : current - btMask;
     U32* smallerPtr = bt + 2*(current&btMask);
     U32* largerPtr  = bt + 2*(current&btMask) + 1;
@@ -1206,7 +1228,7 @@ static U32 ZSTD_insertBt1_extDict(ZSTD_CCtx* zc, const BYTE* const ip, const U32
         return (U32)(rleLength - mls);
     }
 
-    hashTable[h] = (U32)(ip - base);   /* Update Hash Table */
+    hashTable[h] = current;   /* Update Hash Table */
 
     while (nbCompares-- && (matchIndex > windowLow))
     {
@@ -1297,7 +1319,7 @@ size_t ZSTD_insertBtAndFindBestMatch_extDict (
     size_t bestLength = 0;
     U32 dummy32;   /* to be nullified at the end */
 
-    hashTable[h] = (U32)(ip-base);   /* Update Hash Table */
+    hashTable[h] = current;   /* Update Hash Table */
 
     while (nbCompares-- && (matchIndex > windowLow))
     {
@@ -1515,6 +1537,7 @@ size_t ZSTD_compressBlock_lazy_generic(ZSTD_CCtx* ctx,
     const BYTE* anchor = istart;
     const BYTE* const iend = istart + srcSize;
     const BYTE* const ilimit = iend - 8;
+    const BYTE* const base = ctx->base + ctx->dictLimit;
 
     size_t offset_2=REPCODE_STARTVALUE, offset_1=REPCODE_STARTVALUE;
     const U32 maxSearches = 1 << ctx->params.searchLog;
@@ -1527,7 +1550,7 @@ size_t ZSTD_compressBlock_lazy_generic(ZSTD_CCtx* ctx,
 
     /* init */
     ZSTD_resetSeqStore(seqStorePtr);
-    if (((ip-ctx->base) - ctx->dictLimit) < REPCODE_STARTVALUE) ip += REPCODE_STARTVALUE;
+    if ((ip-base) < REPCODE_STARTVALUE) ip = base + REPCODE_STARTVALUE;
 
     /* Match Loop */
     while (ip < ilimit)
@@ -1552,7 +1575,7 @@ size_t ZSTD_compressBlock_lazy_generic(ZSTD_CCtx* ctx,
                 matchLength = ml2, start = ip, offset=offsetFound;
         }
 
-         if (matchLength < MINMATCH)
+        if (matchLength < MINMATCH)
         {
             ip += ((ip-anchor) >> g_searchStrength) + 1;   /* jump faster over incompressible sections */
             continue;
@@ -1613,7 +1636,7 @@ size_t ZSTD_compressBlock_lazy_generic(ZSTD_CCtx* ctx,
         /* catch up */
         if (offset)
         {
-            while ((start>anchor) && (start>ctx->base+offset) && (start[-1] == start[-1-offset]))   /* only search for offset within prefix */
+            while ((start>anchor) && (start>base+offset) && (start[-1] == start[-1-offset]))   /* only search for offset within prefix */
                 { start--; matchLength++; }
             offset_2 = offset_1; offset_1 = offset;
         }
@@ -1704,7 +1727,7 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(ZSTD_CCtx* ctx,
 
     /* init */
     ZSTD_resetSeqStore(seqStorePtr);
-    if (((ip-base) - dictLimit) < REPCODE_STARTVALUE) ip += REPCODE_STARTVALUE;
+    if ((ip - prefixStart) < REPCODE_STARTVALUE) ip += REPCODE_STARTVALUE;
 
     /* Match Loop */
     while (ip < ilimit)
@@ -1919,7 +1942,7 @@ static size_t ZSTD_compress_generic (ZSTD_CCtx* ctxPtr,
                                         void* dst, size_t maxDstSize,
                                   const void* src, size_t srcSize)
 {
-    size_t blockSize = BLOCKSIZE;
+    size_t blockSize = ctxPtr->blockSize;
     size_t remaining = srcSize;
     const BYTE* ip = (const BYTE*)src;
     BYTE* const ostart = (BYTE*)dst;
@@ -1972,28 +1995,33 @@ size_t ZSTD_compressContinue (ZSTD_CCtx* zc,
 {
     const BYTE* const ip = (const BYTE*) src;
 
-    /* preemptive overflow correction */
-    if ((zc->base > (const BYTE*)src) || (zc->lowLimit > (1<<30) ))
-    {
-        U32 correction = zc->lowLimit-1;
-        ZSTD_reduceIndex(zc, correction);
-        zc->base += correction;
-        zc->dictBase += correction;
-        zc->lowLimit -= correction;
-        zc->dictLimit -= correction;
-        if (zc->nextToUpdate < correction) zc->nextToUpdate = 0;
-        else zc->nextToUpdate -= correction;
-    }
-
     /* Check if blocks follow each other */
     if (src != zc->nextSrc)
     {
         /* not contiguous */
+        size_t delta = zc->nextSrc - ip;
         zc->lowLimit = zc->dictLimit;
         zc->dictLimit = (U32)(zc->nextSrc - zc->base);
         zc->dictBase = zc->base;
-        zc->base += ip - zc->nextSrc;
+        zc->base -= delta;
         zc->nextToUpdate = zc->dictLimit;
+        if (zc->dictLimit - zc->lowLimit < 8) zc->lowLimit = zc->dictLimit;   /* too small extDict */
+    }
+
+    /* preemptive overflow correction */
+    if (zc->lowLimit > (1<<30))
+    {
+        U32 btplus = (zc->params.strategy == ZSTD_btlazy2);
+        U32 contentMask = (1 << (zc->params.contentLog - btplus)) - 1;
+        U32 newLowLimit = zc->lowLimit & contentMask;   /* preserve position % contentSize */
+        U32 correction = zc->lowLimit - newLowLimit;
+        ZSTD_reduceIndex(zc, correction);
+        zc->base += correction;
+        zc->dictBase += correction;
+        zc->lowLimit = newLowLimit;
+        zc->dictLimit -= correction;
+        if (zc->nextToUpdate < correction) zc->nextToUpdate = 0;
+        else zc->nextToUpdate -= correction;
     }
 
     /* input-dictionary overlap */
@@ -2008,8 +2036,46 @@ size_t ZSTD_compressContinue (ZSTD_CCtx* zc,
     return ZSTD_compress_generic (zc, dst, dstSize, src, srcSize);
 }
 
+size_t ZSTD_compress_insertDictionary(ZSTD_CCtx* zc, const void* src, size_t srcSize)
+{
+    const BYTE* const ip = (const BYTE*) src;
+    const BYTE* const iend = ip + srcSize;
 
-/** ZSTD_compressBegin_advanced
+    /* input becomes current prefix */
+    zc->lowLimit = zc->dictLimit;
+    zc->dictLimit = (U32)(zc->nextSrc - zc->base);
+    zc->dictBase = zc->base;
+    zc->base += ip - zc->nextSrc;
+    zc->nextToUpdate = zc->dictLimit;
+
+    zc->nextSrc = iend;
+    if (srcSize <= 8) return 0;
+
+    switch(zc->params.strategy)
+    {
+    case ZSTD_fast:
+        ZSTD_fillHashTable (zc, iend-8, zc->params.searchLength);
+        break;
+
+    case ZSTD_greedy:
+    case ZSTD_lazy:
+    case ZSTD_lazy2:
+        ZSTD_insertAndFindFirstIndex (zc, iend-8, zc->params.searchLength);
+        break;
+
+    case ZSTD_btlazy2:
+        ZSTD_updateTree(zc, iend-8, iend, 1 << zc->params.searchLog, zc->params.searchLength);
+        break;
+
+    default:
+        return ERROR(GENERIC);   /* strategy doesn't exist; impossible */
+    }
+
+    return 0;
+}
+
+
+/*! ZSTD_compressBegin_advanced
 *   Write frame header, according to params
 *   @return : nb of bytes written */
 size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* ctx,
@@ -2036,7 +2102,7 @@ size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* ctx,
 ZSTD_parameters ZSTD_getParams(int compressionLevel, U64 srcSizeHint)
 {
     ZSTD_parameters result;
-    int tableID = ((srcSizeHint-1) <= 128 KB);   /* intentional underflow for srcSizeHint == 0 */
+    int tableID = ((srcSizeHint-1) <= 256 KB) + ((srcSizeHint-1) <= 128 KB) + ((srcSizeHint-1) <= 16 KB);   /* intentional underflow for srcSizeHint == 0 */
     if (compressionLevel<=0) compressionLevel = 1;
     if (compressionLevel > ZSTD_MAX_CLEVEL) compressionLevel = ZSTD_MAX_CLEVEL;
     result = ZSTD_defaultParameters[tableID][compressionLevel];
@@ -2051,7 +2117,7 @@ size_t ZSTD_compressBegin(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, int comp
 }
 
 
-/** ZSTD_compressEnd
+/*! ZSTD_compressEnd
 *   Write frame epilogue
 *   @return : nb of bytes written into dst (or an error code) */
 size_t ZSTD_compressEnd(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize)
@@ -2073,6 +2139,7 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize)
 size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
                                void* dst, size_t maxDstSize,
                          const void* src, size_t srcSize,
+                         const void* dict,size_t dictSize,
                                ZSTD_parameters params)
 {
     BYTE* const ostart = (BYTE*)dst;
@@ -2085,9 +2152,15 @@ size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
     op += oSize;
     maxDstSize -= oSize;
 
+    /* dictionary */
+    if (dict)
+    {
+        oSize = ZSTD_compress_insertDictionary(ctx, dict, dictSize);
+        if (ZSTD_isError(oSize)) return oSize;
+    }
+
     /* body (compression) */
-    ctx->base = (const BYTE*)src;
+    oSize = ZSTD_compressContinue (ctx, op,  maxDstSize, src, srcSize);
-    oSize = ZSTD_compress_generic (ctx, op,  maxDstSize, src, srcSize);
     if(ZSTD_isError(oSize)) return oSize;
     op += oSize;
     maxDstSize -= oSize;
@@ -2100,9 +2173,14 @@ size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
     return (op - ostart);
 }
 
+size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize, const void* dict, size_t dictSize, int compressionLevel)
+{
+    return ZSTD_compress_advanced(ctx, dst, maxDstSize, src, srcSize, dict, dictSize, ZSTD_getParams(compressionLevel, srcSize+dictSize));
+}
+
 size_t ZSTD_compressCCtx (ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel)
 {
-    return ZSTD_compress_advanced(ctx, dst, maxDstSize, src, srcSize, ZSTD_getParams(compressionLevel, srcSize));
+    return ZSTD_compress_advanced(ctx, dst, maxDstSize, src, srcSize, NULL, 0, ZSTD_getParams(compressionLevel, srcSize));
 }
 
 size_t ZSTD_compress(void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel)
@@ -2114,3 +2192,4 @@ size_t ZSTD_compress(void* dst, size_t maxDstSize, const void* src, size_t srcSi
     free(ctxBody.workSpace);   /* can't free ctxBody, since it's on stack; free heap content */
     return result;
 }
+

lib/zstd_decompress.c

@@ -127,10 +127,10 @@ struct ZSTD_DCtx_s
     U32 LLTable[FSE_DTABLE_SIZE_U32(LLFSELog)];
     U32 OffTable[FSE_DTABLE_SIZE_U32(OffFSELog)];
     U32 MLTable[FSE_DTABLE_SIZE_U32(MLFSELog)];
-    void* previousDstEnd;
+    const void* previousDstEnd;
-    void* base;
+    const void* base;
-    void* vBase;
+    const void* vBase;
-    void* dictEnd;
+    const void* dictEnd;
     size_t expected;
     size_t headerSize;
     ZSTD_parameters params;
@@ -141,7 +141,7 @@ struct ZSTD_DCtx_s
     size_t litSize;
     BYTE litBuffer[BLOCKSIZE + 8 /* margin for wildcopy */];
     BYTE headerBuffer[ZSTD_frameHeaderSize_max];
-};   /* typedef'd to ZSTD_Dctx within "zstd_static.h" */
+};  /* typedef'd to ZSTD_DCtx within "zstd_static.h" */
 
 size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx)
 {
@@ -505,7 +505,7 @@ static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState)
 FORCE_INLINE size_t ZSTD_execSequence(BYTE* op,
                                 BYTE* const oend, seq_t sequence,
                                 const BYTE** litPtr, const BYTE* const litLimit_8,
-                                BYTE* const base, BYTE* const vBase, BYTE* const dictEnd)
+                                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 };   /* substracted */
@@ -527,64 +527,61 @@ FORCE_INLINE size_t ZSTD_execSequence(BYTE* op,
     *litPtr = litEnd;   /* update for next sequence */
 
     /* copy Match */
-	/* check */
+    if (sequence.offset > (size_t)(oLitEnd - base))
-	//if (match > oLitEnd) return ERROR(corruption_detected);   /* address space overflow test (is clang optimizer wrongly removing this test ?) */
+    {
-	if (sequence.offset > (size_t)oLitEnd) return ERROR(corruption_detected);   /* address space overflow test (this test seems preserved by clang optimizer) */
+        /* 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 (match < base)
+    /* match within prefix */
-	{
+    if (sequence.offset < 8)
-		/* offset beyond prefix */
+    {
-		if (match < vBase) return ERROR(corruption_detected);
+        /* close range match, overlap */
-		match = dictEnd - (base-match);
+        const int sub2 = dec64table[sequence.offset];
-		if (match + sequence.matchLength <= dictEnd)
+        op[0] = match[0];
-		{
+        op[1] = match[1];
-			memcpy(oLitEnd, match, sequence.matchLength);
+        op[2] = match[2];
-			return sequenceLength;
+        op[3] = match[3];
-		}
+        match += dec32table[sequence.offset];
-		/* span extDict & currentPrefixSegment */
+        ZSTD_copy4(op+4, match);
-		{
+        match -= sub2;
-			size_t length1 = dictEnd - match;
+    }
-			memcpy(oLitEnd, match, length1);
+    else
-			op = oLitEnd + length1;
+    {
-			sequence.matchLength -= length1;
+        ZSTD_copy8(op, match);
-			match = base;
+    }
-		}
+    op += 8; match += 8;
-	}
 
-	/* match within prefix */
+    if (oMatchEnd > oend-12)
-	if (sequence.offset < 8)
+    {
-	{
+        if (op < oend_8)
-		/* close range match, overlap */
+        {
-		const int sub2 = dec64table[sequence.offset];
+            ZSTD_wildcopy(op, match, oend_8 - op);
-		op[0] = match[0];
+            match += oend_8 - op;
-		op[1] = match[1];
+            op = oend_8;
-		op[2] = match[2];
+        }
-		op[3] = match[3];
+        while (op < oMatchEnd) *op++ = *match++;
-		match += dec32table[sequence.offset];
+    }
-		ZSTD_copy4(op+4, match);
+    else
-		match -= sub2;
+    {
-	}
+        ZSTD_wildcopy(op, match, sequence.matchLength-8);   /* works even if matchLength < 8 */
-	else
+    }
-	{
+    return sequenceLength;
-		ZSTD_copy8(op, match);
-	}
-	op += 8; match += 8;
-
-	if (oMatchEnd > oend-12)
-	{
-		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, sequence.matchLength-8);   /* works even if matchLength < 8 */
-	}
-	return sequenceLength;
 }
 
 
@@ -607,9 +604,9 @@ static size_t ZSTD_decompressSequences(
     U32* DTableLL = dctx->LLTable;
     U32* DTableML = dctx->MLTable;
     U32* DTableOffb = dctx->OffTable;
-    BYTE* const base = (BYTE*) (dctx->base);
+    const BYTE* const base = (const BYTE*) (dctx->base);
-    BYTE* const vBase = (BYTE*) (dctx->vBase);
+    const BYTE* const vBase = (const BYTE*) (dctx->vBase);
-    BYTE* const dictEnd = (BYTE*) (dctx->dictEnd);
+    const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd);
 
     /* Build Decoding Tables */
     errorCode = ZSTD_decodeSeqHeaders(&nbSeq, &dumps, &dumpsLength,
@@ -634,20 +631,7 @@ static size_t ZSTD_decompressSequences(
         FSE_initDState(&(seqState.stateOffb), &(seqState.DStream), DTableOffb);
         FSE_initDState(&(seqState.stateML), &(seqState.DStream), DTableML);
 
-        for ( ; (BIT_reloadDStream(&(seqState.DStream)) < BIT_DStream_completed) ; )
+        for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && nbSeq ; )
-        {
-            size_t oneSeqSize;
-            nbSeq--;
-            ZSTD_decodeSequence(&sequence, &seqState);
-            oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litLimit_8, base, vBase, dictEnd);
-            if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
-            op += oneSeqSize;
-        }
-
-        if (nbSeq<0) return ERROR(corruption_detected);   /* requested too many sequences : data is corrupted */
-
-		/* now BIT_reloadDStream(&(seqState.DStream)) >= BIT_DStream_completed) */
-        for ( ; (BIT_reloadDStream(&(seqState.DStream)) == BIT_DStream_completed) && nbSeq ; )
         {
             size_t oneSeqSize;
             nbSeq--;
@@ -658,7 +642,7 @@ static size_t ZSTD_decompressSequences(
         }
 
         /* check if reached exact end */
-        if ( !BIT_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected);   /* DStream should be entirely and precisely consumed; otherwise data is corrupted */
+        if ( !BIT_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected);   /* DStream should be entirely and exactly consumed; otherwise data is corrupted */
 
         /* last literal segment */
         {
@@ -692,7 +676,10 @@ static size_t ZSTD_decompressBlock(
 }
 
 
-size_t ZSTD_decompressDCtx(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+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;
@@ -702,9 +689,19 @@ size_t ZSTD_decompressDCtx(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const v
     size_t remainingSize = srcSize;
     blockProperties_t blockProperties;
 
-
     /* init */
-    ctx->base = ctx->vBase = ctx->dictEnd = dst;
+    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 */
     {
@@ -765,10 +762,16 @@ size_t ZSTD_decompressDCtx(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const v
     return op-ostart;
 }
 
+
+size_t ZSTD_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 ZSTD_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
 {
-    ZSTD_DCtx ctx;
+    ZSTD_DCtx dctx;
-    return ZSTD_decompressDCtx(&ctx, dst, maxDstSize, src, srcSize);
+    return ZSTD_decompressDCtx(&dctx, dst, maxDstSize, src, srcSize);
 }
 
 
@@ -786,10 +789,8 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, con
     if (srcSize != ctx->expected) return ERROR(srcSize_wrong);
     if (dst != ctx->previousDstEnd)   /* not contiguous */
     {
-        if ((dst > ctx->base) && (dst < ctx->previousDstEnd))   /* rolling buffer : new segment into dictionary */
-            ctx->base = (char*)dst;   /* temporary affectation, for vBase calculation */
         ctx->dictEnd = ctx->previousDstEnd;
-        ctx->vBase = (char*)dst - ((char*)(ctx->previousDstEnd) - (char*)(ctx->base));
+        ctx->vBase = (const char*)dst - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
         ctx->base = dst;
         ctx->previousDstEnd = dst;
     }
@@ -840,10 +841,9 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, con
                 ctx->bType = bp.blockType;
                 ctx->stage = ZSTDds_decompressBlock;
             }
-
             return 0;
         }
-    case 3:
+    case ZSTDds_decompressBlock:
         {
             /* Decompress : block content */
             size_t rSize;
@@ -875,3 +875,10 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, con
 }
 
 
+void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* src, size_t srcSize)
+{
+    ctx->dictEnd = ctx->previousDstEnd;
+    ctx->vBase = (const char*)src - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
+    ctx->base = src;
+    ctx->previousDstEnd = (const char*)src + srcSize;
+}

lib/zstd_static.h

@@ -80,35 +80,64 @@ typedef struct
 
 
 /* *************************************
-*  Advanced function
+*  Advanced functions
 ***************************************/
 /** ZSTD_getParams
 *   return ZSTD_parameters structure for a selected compression level and srcSize.
 *   srcSizeHint value is optional, select 0 if not known */
-ZSTD_parameters ZSTD_getParams(int compressionLevel, U64 srcSizeHint);
+ZSTDLIB_API ZSTD_parameters ZSTD_getParams(int compressionLevel, U64 srcSizeHint);
 
 /** ZSTD_validateParams
 *   correct params value to remain within authorized range */
-void ZSTD_validateParams(ZSTD_parameters* params);
+ZSTDLIB_API void ZSTD_validateParams(ZSTD_parameters* params);
+
+/** ZSTD_compress_usingDict
+*   Same as ZSTD_compressCCtx(), using a Dictionary content as prefix
+*   Note : dict can be NULL, in which case, it's equivalent to ZSTD_compressCCtx() */
+ZSTDLIB_API size_t ZSTD_compress_usingDict(ZSTD_CCtx* ctx,
+                                           void* dst, size_t maxDstSize,
+                                     const void* src, size_t srcSize,
+                                     const void* dict,size_t dictSize,
+                                           int compressionLevel);
 
 /** ZSTD_compress_advanced
-*   Same as ZSTD_compressCCtx(), with fine-tune control of each compression parameter */
+*   Same as ZSTD_compress_usingDict(), with fine-tune control of each compression parameter */
-size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
+ZSTDLIB_API size_t ZSTD_compress_advanced (ZSTD_CCtx* ctx,
-                               void* dst, size_t maxDstSize,
+                                           void* dst, size_t maxDstSize,
-                         const void* src, size_t srcSize,
+                                     const void* src, size_t srcSize,
-                               ZSTD_parameters params);
+                                     const void* dict,size_t dictSize,
+                                           ZSTD_parameters params);
+
+/** Decompression context management */
+typedef struct ZSTD_DCtx_s ZSTD_DCtx;
+ZSTDLIB_API ZSTD_DCtx* ZSTD_createDCtx(void);
+ZSTDLIB_API size_t     ZSTD_freeDCtx(ZSTD_DCtx* dctx);
+
+/** ZSTD_decompressDCtx
+*   Same as ZSTD_decompress, with pre-allocated DCtx structure */
+size_t ZSTD_decompressDCtx(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
+
+/** ZSTD_decompress_usingDict
+*   Same as ZSTD_decompressDCtx, using a Dictionary content as prefix
+*   Note : dict can be NULL, in which case, it's equivalent to ZSTD_decompressDCtx() */
+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);
 
 
 /* **************************************
-*  Streaming functions (bufferless mode)
+*  Streaming functions (direct mode)
 ****************************************/
-size_t ZSTD_compressBegin(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize, int compressionLevel);
+ZSTDLIB_API size_t ZSTD_compressBegin(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize, int compressionLevel);
-size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, ZSTD_parameters params);
+ZSTDLIB_API size_t ZSTD_compressBegin_advanced(ZSTD_CCtx* ctx, void* dst, size_t maxDstSize, ZSTD_parameters params);
-size_t ZSTD_compressContinue(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
+ZSTDLIB_API size_t ZSTD_compress_insertDictionary(ZSTD_CCtx* ctx, const void* src, size_t srcSize);
-size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize);
+
+ZSTDLIB_API size_t ZSTD_compressContinue(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
+ZSTDLIB_API size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize);
 
 /**
-  Streaming compression, bufferless mode
+  Streaming compression, direct mode (bufferless)
 
   A ZSTD_CCtx object is required to track streaming operations.
   Use ZSTD_createCCtx() / ZSTD_freeCCtx() to manage it.
@@ -118,6 +147,10 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize);
   Use ZSTD_compressBegin().
   You may also prefer the advanced derivative ZSTD_compressBegin_advanced(), for finer parameter control.
 
+  It's then possible to add a dictionary with ZSTD_compress_insertDictionary()
+  Note that dictionary presence is a "hidden" information,
+  the decoder needs to be aware that it is required for proper decoding, or decoding will fail.
+
   Then, consume your input using ZSTD_compressContinue().
   The interface is synchronous, so all input will be consumed.
   You must ensure there is enough space in destination buffer to store compressed data under worst case scenario.
@@ -125,18 +158,18 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize);
 
   Finish a frame with ZSTD_compressEnd(), which will write the epilogue.
   Without it, the frame will be considered incomplete by decoders.
-  You can then re-use ZSTD_CCtx to compress new frames.
+
+  You can then reuse ZSTD_CCtx to compress new frames.
 */
 
 
-typedef struct ZSTD_DCtx_s ZSTD_DCtx;
+ZSTDLIB_API size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx);
-ZSTD_DCtx* ZSTD_createDCtx(void);
+ZSTDLIB_API size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize);
-size_t     ZSTD_resetDCtx(ZSTD_DCtx* dctx);
+ZSTDLIB_API void   ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
-size_t     ZSTD_freeDCtx(ZSTD_DCtx* dctx);
+
+ZSTDLIB_API size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx);
+ZSTDLIB_API size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
 
-size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize);
-size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx);
-size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
 /**
   Streaming decompression, bufferless mode
 
@@ -146,15 +179,18 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, co
 
   First operation is to retrieve frame parameters, using ZSTD_getFrameParams().
   This function doesn't consume its input. It needs enough input data to properly decode the frame header.
-  The objective is to retrieve *params.windowlog, to know minimum amount of memory required during decoding.
+  Objective is to retrieve *params.windowlog, to know minimum amount of memory required during decoding.
   Result : 0 when successful, it means the ZSTD_parameters structure has been filled.
            >0 : means there is not enough data into src. Provides the expected size to successfully decode header.
            errorCode, which can be tested using ZSTD_isError() (For example, if it's not a ZSTD header)
 
+  Then, you can optionally insert a dictionary.
+  This operation must mimic the compressor behavior, otherwise decompression will fail or be corrupted.
+
   Then it's possible to start decompression.
   Use ZSTD_nextSrcSizeToDecompress() and ZSTD_decompressContinue() alternatively.
   ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue().
-  ZSTD_decompressContinue() requires this exact amount of bytes, or just fails.
+  ZSTD_decompressContinue() requires this exact amount of bytes, or it will fail.
   ZSTD_decompressContinue() needs previous data blocks during decompression, up to (1 << windowlog).
   They should preferably be located contiguously, prior to current block. Alternatively, a round buffer is also possible.
 
@@ -169,9 +205,10 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, co
 *  Pre-defined compression levels
 ***************************************/
 #define ZSTD_MAX_CLEVEL 20
-static const ZSTD_parameters ZSTD_defaultParameters[2][ZSTD_MAX_CLEVEL+1] = {
+ZSTDLIB_API unsigned ZSTD_maxCLevel (void);
+static const ZSTD_parameters ZSTD_defaultParameters[4][ZSTD_MAX_CLEVEL+1] = {
 {   /* "default" */
-    /*   W,  C,  H,  S,  L, strat */
+    /*    W,  C,  H,  S,  L, strat */
     { 0, 18, 12, 12,  1,  4, ZSTD_fast    },  /* level  0 - never used */
     { 0, 19, 13, 14,  1,  7, ZSTD_fast    },  /* level  1 */
     { 0, 19, 15, 16,  1,  6, ZSTD_fast    },  /* level  2 */
@@ -194,8 +231,32 @@ static const ZSTD_parameters ZSTD_defaultParameters[2][ZSTD_MAX_CLEVEL+1] = {
     { 0, 25, 26, 23,  5,  5, ZSTD_btlazy2 },  /* level 19 */
     { 0, 26, 27, 25,  9,  5, ZSTD_btlazy2 },  /* level 20 */
 },
+{   /* for srcSize <= 256 KB */
+    /*     W,  C,  H,  S,  L, strat */
+    {  0, 18, 13, 14,  1,  7, ZSTD_fast    },  /* level  0 - never used */
+    {  0, 18, 14, 15,  1,  6, ZSTD_fast    },  /* level  1 */
+    {  0, 18, 14, 15,  1,  5, ZSTD_fast    },  /* level  2 */
+    {  0, 18, 12, 15,  3,  7, ZSTD_greedy  },  /* level  3 */
+    {  0, 18, 13, 15,  4,  7, ZSTD_greedy  },  /* level  4 */
+    {  0, 18, 14, 15,  5,  7, ZSTD_greedy  },  /* level  5 */
+    {  0, 18, 13, 15,  4,  7, ZSTD_lazy    },  /* level  6 */
+    {  0, 18, 14, 16,  5,  7, ZSTD_lazy    },  /* level  7 */
+    {  0, 18, 15, 16,  6,  7, ZSTD_lazy    },  /* level  8 */
+    {  0, 18, 15, 15,  7,  7, ZSTD_lazy    },  /* level  9 */
+    {  0, 18, 16, 16,  7,  7, ZSTD_lazy    },  /* level 10 */
+    {  0, 18, 16, 16,  8,  4, ZSTD_lazy    },  /* level 11 */
+    {  0, 18, 17, 16,  8,  4, ZSTD_lazy    },  /* level 12 */
+    {  0, 18, 17, 16,  9,  4, ZSTD_lazy    },  /* level 13 */
+    {  0, 18, 18, 16,  9,  4, ZSTD_lazy    },  /* level 14 */
+    {  0, 18, 17, 17,  9,  4, ZSTD_lazy2   },  /* level 15 */
+    {  0, 18, 18, 18,  9,  4, ZSTD_lazy2   },  /* level 16 */
+    {  0, 18, 18, 18, 10,  4, ZSTD_lazy2   },  /* level 17 */
+    {  0, 18, 18, 18, 11,  4, ZSTD_lazy2   },  /* level 18 */
+    {  0, 18, 18, 18, 12,  4, ZSTD_lazy2   },  /* level 19 */
+    {  0, 18, 18, 18, 13,  4, ZSTD_lazy2   },  /* level 20 */
+},
 {   /* for srcSize <= 128 KB */
-    /* W,  C,  H,  S,  L, strat */
+    /*    W,  C,  H,  S,  L, strat */
     { 0, 17, 12, 12,  1,  4, ZSTD_fast    },  /* level  0 - never used */
     { 0, 17, 12, 13,  1,  6, ZSTD_fast    },  /* level  1 */
     { 0, 17, 15, 16,  1,  5, ZSTD_fast    },  /* level  2 */
@@ -218,6 +279,30 @@ static const ZSTD_parameters ZSTD_defaultParameters[2][ZSTD_MAX_CLEVEL+1] = {
     { 0, 17, 18, 16, 10,  4, ZSTD_btlazy2 },  /* level 19 */
     { 0, 17, 18, 18, 12,  4, ZSTD_btlazy2 },  /* level 20 */
 },
+{   /* for srcSize <= 16 KB */
+    /*     W,  C,  H,  S,  L, strat */
+    {  0,  0,  0,  0,  0,  0, ZSTD_fast    },  /* level  0 - never used */
+    {  0, 14, 14, 14,  1,  4, ZSTD_fast    },  /* level  1 */
+    {  0, 14, 14, 16,  1,  4, ZSTD_fast    },  /* level  1 */
+    {  0, 14, 14, 14,  5,  4, ZSTD_greedy  },  /* level  3 */
+    {  0, 14, 14, 14,  8,  4, ZSTD_greedy  },  /* level  4 */
+    {  0, 14, 11, 14,  6,  4, ZSTD_lazy    },  /* level  5 */
+    {  0, 14, 14, 13,  6,  5, ZSTD_lazy    },  /* level  6 */
+    {  0, 14, 14, 14,  7,  6, ZSTD_lazy    },  /* level  7 */
+    {  0, 14, 14, 14,  8,  4, ZSTD_lazy    },  /* level  8 */
+    {  0, 14, 14, 15,  9,  4, ZSTD_lazy    },  /* level  9 */
+    {  0, 14, 14, 15, 10,  4, ZSTD_lazy    },  /* level 10 */
+    {  0, 14, 15, 15,  6,  4, ZSTD_btlazy2 },  /* level 11 */
+    {  0, 14, 15, 15,  7,  4, ZSTD_btlazy2 },  /* level 12 */
+    {  0, 14, 15, 15,  8,  4, ZSTD_btlazy2 },  /* level 13 */
+    {  0, 14, 15, 15,  9,  4, ZSTD_btlazy2 },  /* level 14 */
+    {  0, 14, 15, 15, 10,  4, ZSTD_btlazy2 },  /* level 15 */
+    {  0, 14, 15, 15, 11,  4, ZSTD_btlazy2 },  /* level 16 */
+    {  0, 14, 15, 15, 12,  4, ZSTD_btlazy2 },  /* level 17 */
+    {  0, 14, 15, 15, 13,  4, ZSTD_btlazy2 },  /* level 18 */
+    {  0, 14, 15, 15, 14,  4, ZSTD_btlazy2 },  /* level 19 */
+    {  0, 14, 15, 15, 15,  4, ZSTD_btlazy2 },  /* level 20 */
+},
 };
 
 

programs/Makefile

@@ -30,7 +30,7 @@
 # fullbench32: Same as fullbench, but forced to compile in 32-bits mode
 # ##########################################################################
 
-VERSION?= 0.4.0
+VERSION?= 0.4.5
 
 DESTDIR?=
 PREFIX ?= /usr/local
@@ -46,7 +46,7 @@ ZSTDDIR = ../lib
 ZSTD_FILES := $(ZSTDDIR)/zstd_compress.c $(ZSTDDIR)/zstd_decompress.c $(ZSTDDIR)/fse.c $(ZSTDDIR)/huff0.c
 ZSTD_LEGACY:= $(ZSTDDIR)/legacy/zstd_v01.c $(ZSTDDIR)/legacy/zstd_v02.c $(ZSTDDIR)/legacy/zstd_v03.c
 
-ifeq ($(ZSTD_LEGACY),disable)
+ifeq ($(ZSTD_LEGACY_SUPPORT), 0)
 CPPFLAGS  += -DZSTD_LEGACY_SUPPORT=0
 else
 ZSTD_FILES+= $(ZSTD_LEGACY)
@@ -65,6 +65,7 @@ VOID = /dev/null
 endif
 
 ZBUFFTEST = -T2mn
+FUZZERTEST= -T5mn
 
 .PHONY: default all clean install uninstall test test32 test-all
 
@@ -73,13 +74,29 @@ default: zstd
 all: zstd zstd32 fullbench fullbench32 fuzzer fuzzer32 zbufftest zbufftest32 paramgrill datagen
 
 zstd  : $(ZSTD_FILES) $(ZSTDDIR)/zstd_buffered.c \
-        xxhash.c bench.c fileio.c zstdcli.c $(ZSTD_FILEIO_LEGACY)
+        zstdcli.c fileio.c $(ZSTD_FILEIO_LEGACY) bench.c xxhash.c datagen.c 
 	$(CC)      $(FLAGS) $^ -o $@$(EXT)
 
 zstd32: $(ZSTD_FILES) $(ZSTDDIR)/zstd_buffered.c \
-        xxhash.c bench.c fileio.c zstdcli.c $(ZSTD_FILEIO_LEGACY)
+        zstdcli.c fileio.c $(ZSTD_FILEIO_LEGACY) bench.c xxhash.c datagen.c 
 	$(CC) -m32 $(FLAGS) $^ -o $@$(EXT)
 
+zstd_nolegacy :
+	$(MAKE) zstd ZSTD_LEGACY_SUPPORT=0
+
+zstd-pgo : MOREFLAGS = -fprofile-generate
+zstd-pgo : clean zstd
+	./zstd -b $(PROFILE_WITH)
+	rm zstd
+	$(MAKE) zstd MOREFLAGS=-fprofile-use
+
+zstd-noBench: $(ZSTD_FILES) $(ZSTDDIR)/zstd_buffered.c \
+        zstdcli.c fileio.c $(ZSTD_FILEIO_LEGACY)
+	$(CC)      $(FLAGS) -DZSTD_NOBENCH $^ -o zstd$(EXT)
+
+zstd-frugal: clean 
+	$(MAKE) zstd-noBench ZSTD_LEGACY_SUPPORT=0 
+
 fullbench  : $(ZSTD_FILES) \
         datagen.c fullbench.c
 	$(CC)      $(FLAGS) $^ -o $@$(EXT)
@@ -112,7 +129,7 @@ datagen : datagen.c datagencli.c
 	$(CC)      $(FLAGS) $^ -o $@$(EXT)
 
 clean:
-	@rm -f core *.o tmp* \
+	@rm -f core *.o tmp* result* *.gcda \
         zstd$(EXT) zstd32$(EXT) \
         fullbench$(EXT) fullbench32$(EXT) \
         fuzzer$(EXT) fuzzer32$(EXT) zbufftest$(EXT) zbufftest32$(EXT) \
@@ -152,77 +169,7 @@ test32: test-zstd32 test-fullbench32 test-fuzzer32 test-zbuff32
 test-all: test test32 valgrindTest
 
 zstd-playTests: datagen
-	@echo "\n**** frame concatenation **** "
+	ZSTD=$(ZSTD) ./playTests.sh --test-large-data
-	@echo "hello " > hello.tmp
-	@echo "world!" > world.tmp
-	@cat hello.tmp world.tmp > helloworld.tmp
-	$(ZSTD) hello.tmp > hello.zstd
-	$(ZSTD) world.tmp > world.zstd
-	@cat hello.zstd world.zstd > helloworld.zstd
-	$(ZSTD) -df helloworld.zstd > result.tmp
-	cat result.tmp
-	sdiff helloworld.tmp result.tmp
-	@rm *.tmp *.zstd
-	@echo frame concatenation test completed
-	@echo "**** flush write error test **** "
-	echo foo | $(ZSTD) > /dev/full; if [ $$? -eq 0 ] ; then echo "write error not detected!"; false; fi
-	echo foo | $(ZSTD) | $(ZSTD) -d > /dev/full; if [ $$? -eq 0 ] ; then echo "write error not detected!"; false; fi
-	@echo "**** zstd round-trip tests **** "
-	@./datagen             | md5sum > tmp1
-	./datagen              | $(ZSTD) -v    | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen              | $(ZSTD) -6 -v | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g270000000 | md5sum > tmp1
-	./datagen -g270000000  | $(ZSTD) -v    | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g270000000  | $(ZSTD) -v2   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g270000000  | $(ZSTD) -v3   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g140000000 -P60| md5sum > tmp1
-	./datagen -g140000000 -P60 | $(ZSTD) -v4   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g140000000 -P60 | $(ZSTD) -v5   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g140000000 -P60 | $(ZSTD) -v6   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g70000000 -P70 | md5sum > tmp1
-	./datagen -g70000000 -P70  | $(ZSTD) -v7   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g70000000 -P70  | $(ZSTD) -v8   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g70000000 -P70  | $(ZSTD) -v9   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g35000000 -P75 | md5sum > tmp1
-	./datagen -g35000000 -P75  | $(ZSTD) -v10  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g35000000 -P75  | $(ZSTD) -v11  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g35000000 -P75  | $(ZSTD) -v12  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g18000000 -P80 | md5sum > tmp1
-	./datagen -g18000000 -P80  | $(ZSTD) -v13  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g18000000 -P80  | $(ZSTD) -v14  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g18000000 -P80  | $(ZSTD) -v15  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g18000000 -P80  | $(ZSTD) -v16  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g18000000 -P80  | $(ZSTD) -v17  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g50000000 -P94 | md5sum > tmp1
-	./datagen -g50000000 -P94  | $(ZSTD) -v18  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g50000000 -P94  | $(ZSTD) -v19  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	@./datagen -g99000000 -P99 | md5sum > tmp1
-	./datagen -g99000000 -P99  | $(ZSTD) -v20  | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
-	./datagen -g6000000000 -P99| md5sum > tmp1
-	./datagen -g6000000000 -P99| $(ZSTD) -vq   | $(ZSTD) -d  | md5sum > tmp2
-	@diff tmp1 tmp2   
 
 test-zstd: ZSTD = ./zstd
 test-zstd: zstd zstd-playTests
@@ -230,6 +177,9 @@ test-zstd: zstd zstd-playTests
 test-zstd32: ZSTD = ./zstd32
 test-zstd32: zstd32 zstd-playTests
 
+test-zstd_nolegacy: ZSTD = ./zstd
+test-zstd_nolegacy: zstd_nolegacy zstd-playTests
+
 test-fullbench: fullbench datagen
 	./fullbench -i1
 	./fullbench -i1 -P0
@@ -239,10 +189,10 @@ test-fullbench32: fullbench32 datagen
 	./fullbench32 -i1 -P0
 
 test-fuzzer: fuzzer
-	./fuzzer
+	./fuzzer $(FUZZERTEST)
 
 test-fuzzer32: fuzzer32
-	./fuzzer32
+	./fuzzer32 $(FUZZERTEST)
 
 test-zbuff: zbufftest
 	./zbufftest $(ZBUFFTEST)
@@ -261,7 +211,7 @@ valgrindTest: zstd datagen fuzzer fullbench zbufftest
 	./datagen -g64MB > tmp
 	valgrind --leak-check=yes --error-exitcode=1 ./zstd -vf tmp $(VOID)
 	@rm tmp
-	valgrind --leak-check=yes --error-exitcode=1 ./fuzzer -i1000 -t1
+	valgrind --leak-check=yes --error-exitcode=1 ./fuzzer -T1mn -t1
 	valgrind --leak-check=yes --error-exitcode=1 ./fullbench -i1
 	valgrind --leak-check=yes --error-exitcode=1 ./zbufftest -T1mn
 

programs/bench.c

@@ -27,7 +27,10 @@
 *  Compiler Options
 ****************************************/
 /* Disable some Visual warning messages */
-#define _CRT_SECURE_NO_WARNINGS                  /* fopen */
+#ifdef _MSC_VER
+#  define _CRT_SECURE_NO_WARNINGS                /* fopen */
+#  pragma warning(disable : 4127)                /* disable: C4127: conditional expression is constant */
+#endif
 
 /* Unix Large Files support (>4GB) */
 #define _FILE_OFFSET_BITS 64
@@ -54,14 +57,15 @@
 
 /* Use ftime() if gettimeofday() is not available */
 #if defined(BMK_LEGACY_TIMER)
-#  include <sys/timeb.h>   /* timeb, ftime */
+#  include <sys/timeb.h>  /* timeb, ftime */
 #else
-#  include <sys/time.h>    /* gettimeofday */
+#  include <sys/time.h>   /* gettimeofday */
 #endif
 
 #include "mem.h"
-#include "zstd.h"
+#include "zstd_static.h"
 #include "xxhash.h"
+#include "datagen.h"      /* RDG_genBuffer */
 
 
 /* *************************************
@@ -71,6 +75,10 @@
 #  define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
 #endif
 
+#ifdef _MSC_VER
+#define snprintf sprintf_s
+#endif
+
 
 /* *************************************
 *  Constants
@@ -82,18 +90,35 @@
 #define MB *(1 <<20)
 #define GB *(1U<<30)
 
-static const size_t maxMemory = sizeof(size_t)==4  ?  (2 GB - 64 MB) : (size_t)(1ULL << ((sizeof(size_t)*8)-31));
+static const size_t maxMemory = (sizeof(size_t)==4)  ?  (2 GB - 64 MB) : (size_t)(1ULL << ((sizeof(size_t)*8)-31));
 #define DEFAULT_CHUNKSIZE   (4 MB)
 
 static U32 g_compressibilityDefault = 50;
-static U32 prime1 = 2654435761U;
-static U32 prime2 = 2246822519U;
 
 
 /* *************************************
-*  Macros
+*  console display
 ***************************************/
-#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
+#define DISPLAY(...)         fprintf(stderr, __VA_ARGS__)
+#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
+static U32 g_displayLevel = 2;   /* 0 : no display;   1: errors;   2 : + result + interaction + warnings;   3 : + progression;   4 : + information */
+
+
+/* *************************************
+*  Exceptions
+***************************************/
+#ifndef DEBUG
+#  define DEBUG 0
+#endif
+#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
+#define EXM_THROW(error, ...)                                             \
+{                                                                         \
+    DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
+    DISPLAYLEVEL(1, "Error %i : ", error);                                \
+    DISPLAYLEVEL(1, __VA_ARGS__);                                         \
+    DISPLAYLEVEL(1, "\n");                                                \
+    exit(error);                                                          \
+}
 
 
 /* *************************************
@@ -157,60 +182,18 @@ static int BMK_GetMilliSpan( int nTimeStart )
   return nSpan;
 }
 
-
+static U64 BMK_getFileSize(const char* infilename)
-/* ********************************************************
-*  Data generator
-**********************************************************/
-/* will hopefully be converted into ROL instruction by compiler */
-static U32 BMK_rotl32(unsigned val32, unsigned nbBits) { return((val32 << nbBits) | (val32 >> (32 - nbBits))); }
-
-static U32 BMK_rand(U32* src)
 {
-    U32 rand32 = *src;
+    int r;
-    rand32 *= prime1;
+#if defined(_MSC_VER)
-    rand32 += prime2;
+    struct _stat64 statbuf;
-    rand32 = BMK_rotl32(rand32, 13);
+    r = _stat64(infilename, &statbuf);
-    *src = rand32;
+#else
-    return rand32 >> 9;
+    struct stat statbuf;
-}
+    r = stat(infilename, &statbuf);
-
+#endif
-#define BMK_RAND15BITS  ( BMK_rand(&seed) & 0x7FFF)
+    if (r || !S_ISREG(statbuf.st_mode)) return 0;   /* No good... */
-#define BMK_RANDLENGTH  ((BMK_rand(&seed) & 3) ? (BMK_rand(&seed) % 15) : (BMK_rand(&seed) % 510) + 15)
+    return (U64)statbuf.st_size;
-#define BMK_RANDCHAR    (BYTE)((BMK_rand(&seed) & 63) + '0')
-static void BMK_datagen(void* buffer, size_t bufferSize, double proba, U32 seed)
-{
-    BYTE* BBuffer = (BYTE*)buffer;
-    unsigned pos = 0;
-    U32 P32 = (U32)(32768 * proba);
-
-    /* First Byte */
-    BBuffer[pos++] = BMK_RANDCHAR;
-
-    while (pos < bufferSize)
-    {
-        /* Select : Literal (noise) or copy (within 64K) */
-        if (BMK_RAND15BITS < P32)
-        {
-            /* Match */
-            size_t match, end;
-            unsigned length = BMK_RANDLENGTH + 4;
-            unsigned offset = BMK_RAND15BITS + 1;
-            if (offset > pos) offset = pos;
-            match = pos - offset;
-            end = pos + length;
-            if (end > bufferSize) end = bufferSize;
-            while (pos < end) BBuffer[pos++] = BBuffer[match++];
-        }
-        else
-        {
-            /* Literal */
-            size_t end;
-            unsigned length = BMK_RANDLENGTH;
-            end = pos + length;
-            if (end > bufferSize) end = bufferSize;
-            while (pos < end) BBuffer[pos++] = BMK_RANDCHAR;
-        }
-    }
 }
 
 
@@ -219,7 +202,7 @@ static void BMK_datagen(void* buffer, size_t bufferSize, double proba, U32 seed)
 **********************************************************/
 typedef struct
 {
-    char*  srcPtr;
+    const char* srcPtr;
     size_t srcSize;
     char*  cPtr;
     size_t cRoom;
@@ -228,62 +211,60 @@ typedef struct
     size_t resSize;
 } blockParam_t;
 
-typedef size_t (*compressor_t) (void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel);
-
 #define MIN(a,b) ((a)<(b) ? (a) : (b))
 
-static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, int cLevel)
+static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
+                        const char* displayName, int cLevel,
+                        const size_t* fileSizes, U32 nbFiles,
+                        const void* dictBuffer, size_t dictBufferSize)
 {
     const size_t blockSize = (g_blockSize ? g_blockSize : srcSize) + (!srcSize);   /* avoid div by 0 */
-    const U32 nbBlocks = (U32) ((srcSize + (blockSize-1)) / blockSize);
+    const U32 maxNbBlocks = (U32) ((srcSize + (blockSize-1)) / blockSize) + nbFiles;
-    blockParam_t* const blockTable = (blockParam_t*) malloc(nbBlocks * sizeof(blockParam_t));
+    blockParam_t* const blockTable = (blockParam_t*) malloc(maxNbBlocks * sizeof(blockParam_t));
-    const size_t maxCompressedSize = (size_t)nbBlocks * ZSTD_compressBound(blockSize);
+    const size_t maxCompressedSize = ZSTD_compressBound(srcSize) + (maxNbBlocks * 1024);   /* add some room for safety */
     void* const compressedBuffer = malloc(maxCompressedSize);
     void* const resultBuffer = malloc(srcSize);
-    const compressor_t compressor = ZSTD_compress;
+    ZSTD_CCtx* ctx = ZSTD_createCCtx();
-    U64 crcOrig;
+    ZSTD_DCtx* dctx = ZSTD_createDCtx();
+    U64 crcOrig = XXH64(srcBuffer, srcSize, 0);
+    U32 nbBlocks = 0;
 
     /* init */
-    if (strlen(fileName)>16)
+    if (strlen(displayName)>17) displayName += strlen(displayName)-17;   /* can only display 17 characters */
-        fileName += strlen(fileName)-16;
 
     /* Memory allocation & restrictions */
-    if (!compressedBuffer || !resultBuffer || !blockTable)
+    if (!compressedBuffer || !resultBuffer || !blockTable || !ctx || !dctx)
-    {
+        EXM_THROW(31, "not enough memory");
-        DISPLAY("\nError: not enough memory!\n");
-        free(compressedBuffer);
-        free(resultBuffer);
-        free(blockTable);
-        return 12;
-    }
-
-    /* Calculating input Checksum */
-    crcOrig = XXH64(srcBuffer, srcSize, 0);
 
     /* Init blockTable data */
     {
-        U32 i;
+        U32 fileNb;
-        size_t remaining = srcSize;
+        const char* srcPtr = (const char*)srcBuffer;
-        char* srcPtr = (char*)srcBuffer;
         char* cPtr = (char*)compressedBuffer;
         char* resPtr = (char*)resultBuffer;
-        for (i=0; i<nbBlocks; i++)
+        for (fileNb=0; fileNb<nbFiles; fileNb++)
         {
-            size_t thisBlockSize = MIN(remaining, blockSize);
+            size_t remaining = fileSizes[fileNb];
-            blockTable[i].srcPtr = srcPtr;
+            U32 nbBlocksforThisFile = (U32)((remaining + (blockSize-1)) / blockSize);
-            blockTable[i].cPtr = cPtr;
+            U32 blockEnd = nbBlocks + nbBlocksforThisFile;
-            blockTable[i].resPtr = resPtr;
+            for ( ; nbBlocks<blockEnd; nbBlocks++)
-            blockTable[i].srcSize = thisBlockSize;
+            {
-            blockTable[i].cRoom = ZSTD_compressBound(thisBlockSize);
+                size_t thisBlockSize = MIN(remaining, blockSize);
-            srcPtr += thisBlockSize;
+                blockTable[nbBlocks].srcPtr = srcPtr;
-            cPtr += blockTable[i].cRoom;
+                blockTable[nbBlocks].cPtr = cPtr;
-            resPtr += thisBlockSize;
+                blockTable[nbBlocks].resPtr = resPtr;
-            remaining -= thisBlockSize;
+                blockTable[nbBlocks].srcSize = thisBlockSize;
+                blockTable[nbBlocks].cRoom = ZSTD_compressBound(thisBlockSize);
+                srcPtr += thisBlockSize;
+                cPtr += blockTable[nbBlocks].cRoom;
+                resPtr += thisBlockSize;
+                remaining -= thisBlockSize;
+            }
         }
     }
 
     /* warmimg up memory */
-    BMK_datagen(compressedBuffer, maxCompressedSize, 0.10, 1);
+    RDG_genBuffer(compressedBuffer, maxCompressedSize, 0.10, 0.50, 1);
 
     /* Bench */
     {
@@ -301,7 +282,7 @@ static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, i
             U32 blockNb;
 
             /* Compression */
-            DISPLAY("%2i-%-17.17s :%10u ->\r", loopNb, fileName, (U32)srcSize);
+            DISPLAY("%2i-%-17.17s :%10u ->\r", loopNb, displayName, (U32)srcSize);
             memset(compressedBuffer, 0xE5, maxCompressedSize);
 
             nbLoops = 0;
@@ -311,7 +292,11 @@ static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, i
             while (BMK_GetMilliSpan(milliTime) < TIMELOOP)
             {
                 for (blockNb=0; blockNb<nbBlocks; blockNb++)
-                    blockTable[blockNb].cSize = compressor(blockTable[blockNb].cPtr,  blockTable[blockNb].cRoom, blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize, cLevel);
+                    blockTable[blockNb].cSize = ZSTD_compress_usingDict(ctx,
+                                                              blockTable[blockNb].cPtr,  blockTable[blockNb].cRoom,
+                                                              blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize,
+                                                              dictBuffer, dictBufferSize,
+                                                              cLevel);
                 nbLoops++;
             }
             milliTime = BMK_GetMilliSpan(milliTime);
@@ -321,7 +306,7 @@ static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, i
                 cSize += blockTable[blockNb].cSize;
             if ((double)milliTime < fastestC*nbLoops) fastestC = (double)milliTime / nbLoops;
             ratio = (double)srcSize / (double)cSize;
-            DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s\r", loopNb, fileName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000.);
+            DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s\r", loopNb, displayName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000.);
 
 #if 1
             /* Decompression */
@@ -334,13 +319,15 @@ static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, i
             for ( ; BMK_GetMilliSpan(milliTime) < TIMELOOP; nbLoops++)
             {
                 for (blockNb=0; blockNb<nbBlocks; blockNb++)
-                    blockTable[blockNb].resSize = ZSTD_decompress(blockTable[blockNb].resPtr, blockTable[blockNb].srcSize,
+                    blockTable[blockNb].resSize = ZSTD_decompress_usingDict(dctx,
-                                                                  blockTable[blockNb].cPtr, blockTable[blockNb].cSize);
+                                                                blockTable[blockNb].resPtr, blockTable[blockNb].srcSize,
+                                                                blockTable[blockNb].cPtr, blockTable[blockNb].cSize,
+                                                                dictBuffer, dictBufferSize);
             }
             milliTime = BMK_GetMilliSpan(milliTime);
 
             if ((double)milliTime < fastestD*nbLoops) fastestD = (double)milliTime / nbLoops;
-            DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s ,%6.1f MB/s\r", loopNb, fileName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000., (double)srcSize / fastestD / 1000.);
+            DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s ,%6.1f MB/s\r", loopNb, displayName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000., (double)srcSize / fastestD / 1000.);
 
             /* CRC Checking */
             crcCheck = XXH64(resultBuffer, srcSize, 0);
@@ -348,10 +335,10 @@ static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, i
             {
                 unsigned u;
                 unsigned eBlockSize = (unsigned)(MIN(65536*2, blockSize));
-                DISPLAY("\n!!! WARNING !!! %14s : Invalid Checksum : %x != %x\n", fileName, (unsigned)crcOrig, (unsigned)crcCheck);
+                DISPLAY("\n!!! WARNING !!! %14s : Invalid Checksum : %x != %x\n", displayName, (unsigned)crcOrig, (unsigned)crcCheck);
                 for (u=0; u<srcSize; u++)
                 {
-                    if (((BYTE*)srcBuffer)[u] != ((BYTE*)resultBuffer)[u])
+                    if (((const BYTE*)srcBuffer)[u] != ((const BYTE*)resultBuffer)[u])
                     {
                         printf("Decoding error at pos %u (block %u, pos %u) \n", u, u / eBlockSize, u % eBlockSize);
                         break;
@@ -363,30 +350,20 @@ static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, i
         }
 
         if (crcOrig == crcCheck)
-            DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s ,%6.1f MB/s \n", cLevel, fileName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000., (double)srcSize / fastestD / 1000.);
+            DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s ,%6.1f MB/s \n", cLevel, displayName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000., (double)srcSize / fastestD / 1000.);
+        else
+            DISPLAY("X \n");
     }
 
-    /* End cleaning */
+    /* clean up */
     free(compressedBuffer);
     free(resultBuffer);
+    ZSTD_freeCCtx(ctx);
+    ZSTD_freeDCtx(dctx);
     return 0;
 }
 
 
-static U64 BMK_GetFileSize(const char* infilename)
-{
-    int r;
-#if defined(_MSC_VER)
-    struct _stat64 statbuf;
-    r = _stat64(infilename, &statbuf);
-#else
-    struct stat statbuf;
-    r = stat(infilename, &statbuf);
-#endif
-    if (r || !S_ISREG(statbuf.st_mode)) return 0;   /* No good... */
-    return (U64)statbuf.st_size;
-}
-
 static size_t BMK_findMaxMem(U64 requiredMem)
 {
     size_t step = 64 MB;
@@ -406,124 +383,143 @@ static size_t BMK_findMaxMem(U64 requiredMem)
     return (size_t)(requiredMem - step);
 }
 
-static int BMK_benchOneFile(const char* inFileName, int cLevel)
+static void BMK_benchCLevel(void* srcBuffer, size_t benchedSize,
+                            const char* displayName, int cLevel,
+                            const size_t* fileSizes, unsigned nbFiles,
+                            const void* dictBuffer, size_t dictBufferSize)
 {
-    FILE*  inFile;
+    if (cLevel < 0)
-    U64    inFileSize;
-    size_t benchedSize, readSize;
-    void* srcBuffer;
-    int result=0;
-
-    /* Check file existence */
-    inFile = fopen(inFileName, "rb");
-    if (inFile == NULL)
     {
-        DISPLAY("Pb opening %s\n", inFileName);
+        int l;
-        return 11;
+        for (l=1; l <= -cLevel; l++)
+            BMK_benchMem(srcBuffer, benchedSize,
+                         displayName, l,
+                         fileSizes, nbFiles,
+                         dictBuffer, dictBufferSize);
+        return;
+    }
+    BMK_benchMem(srcBuffer, benchedSize,
+                 displayName, cLevel,
+                 fileSizes, nbFiles,
+                 dictBuffer, dictBufferSize);
+}
+
+static U64 BMK_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles)
+{
+    U64 total = 0;
+    unsigned n;
+    for (n=0; n<nbFiles; n++)
+        total += BMK_getFileSize(fileNamesTable[n]);
+    return total;
+}
+
+static void BMK_loadFiles(void* buffer, size_t bufferSize,
+                          size_t* fileSizes,
+                          const char** fileNamesTable, unsigned nbFiles)
+{
+    BYTE* buff = (BYTE*)buffer;
+    size_t pos = 0;
+    unsigned n;
+
+    for (n=0; n<nbFiles; n++)
+    {
+        size_t readSize;
+        U64 fileSize = BMK_getFileSize(fileNamesTable[n]);
+        FILE* f = fopen(fileNamesTable[n], "rb");
+        if (f==NULL) EXM_THROW(10, "impossible to open file %s", fileNamesTable[n]);
+        DISPLAYLEVEL(2, "Loading %s...       \r", fileNamesTable[n]);
+        if (fileSize > bufferSize-pos) fileSize = bufferSize-pos;
+        readSize = fread(buff+pos, 1, (size_t)fileSize, f);
+        if (readSize != (size_t)fileSize) EXM_THROW(11, "could not read %s", fileNamesTable[n]);
+        pos += readSize;
+        fileSizes[n] = (size_t)fileSize;
+        fclose(f);
+    }
+}
+
+static void BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles,
+                               const char* dictFileName, int cLevel)
+{
+    void* srcBuffer;
+    size_t benchedSize;
+    void* dictBuffer = NULL;
+    size_t dictBufferSize = 0;
+    size_t* fileSizes = (size_t*)malloc(nbFiles * sizeof(size_t));
+    U64 totalSizeToLoad = BMK_getTotalFileSize(fileNamesTable, nbFiles);
+    char mfName[20] = {0};
+    const char* displayName = NULL;
+
+    if (!fileSizes) EXM_THROW(12, "not enough memory for fileSizes");
+
+    /* Load dictionary */
+    if (dictFileName != NULL)
+    {
+        U64 dictFileSize = BMK_getFileSize(dictFileName);
+        if (dictFileSize > 64 MB) EXM_THROW(10, "dictionary file %s too large", dictFileName);
+        dictBufferSize = (size_t)dictFileSize;
+        dictBuffer = malloc(dictBufferSize);
+        if (dictBuffer==NULL) EXM_THROW(11, "not enough memory for dictionary (%u bytes)", (U32)dictBufferSize);
+        BMK_loadFiles(dictBuffer, dictBufferSize, fileSizes, &dictFileName, 1);
     }
 
     /* Memory allocation & restrictions */
-    inFileSize = BMK_GetFileSize(inFileName);
+    benchedSize = BMK_findMaxMem(totalSizeToLoad * 3) / 3;
-    benchedSize = BMK_findMaxMem(inFileSize * 3) / 3;
+    if ((U64)benchedSize > totalSizeToLoad) benchedSize = (size_t)totalSizeToLoad;
-    if ((U64)benchedSize > inFileSize) benchedSize = (size_t)inFileSize;
+    if (benchedSize < totalSizeToLoad)
-    if (benchedSize < inFileSize)
+        DISPLAY("Not enough memory; testing %u MB only...\n", (U32)(benchedSize >> 20));
-        DISPLAY("Not enough memory for '%s' full size; testing %i MB only...\n", inFileName, (int)(benchedSize >> 20));
     srcBuffer = malloc(benchedSize);
-    if (!srcBuffer)
+    if (!srcBuffer) EXM_THROW(12, "not enough memory");
-    {
-        DISPLAY("\nError: not enough memory!\n");
-        fclose(inFile);
-        return 12;
-    }
 
-    /* Fill input buffer */
+    /* Load input buffer */
-    DISPLAY("Loading %s...       \r", inFileName);
+    BMK_loadFiles(srcBuffer, benchedSize, fileSizes, fileNamesTable, nbFiles);
-    readSize = fread(srcBuffer, 1, benchedSize, inFile);
-    fclose(inFile);
-
-    if (readSize != benchedSize)
-    {
-        DISPLAY("\nError: problem reading file '%s' !!    \n", inFileName);
-        free(srcBuffer);
-        return 13;
-    }
 
     /* Bench */
-    if (cLevel<0)
+    snprintf (mfName, sizeof(mfName), " %u files", nbFiles);
-    {
+    if (nbFiles > 1) displayName = mfName;
-        int l;
+    else displayName = fileNamesTable[0];
-        for (l=1; l <= -cLevel; l++)
+
-            result = BMK_benchMem(srcBuffer, benchedSize, inFileName, l);
+    BMK_benchCLevel(srcBuffer, benchedSize,
-    }
+                    displayName, cLevel,
-    else
+                    fileSizes, nbFiles,
-        result = BMK_benchMem(srcBuffer, benchedSize, inFileName, cLevel);
+                    dictBuffer, dictBufferSize);
 
     /* clean up */
     free(srcBuffer);
-    DISPLAY("\n");
+    free(dictBuffer);
-    return result;
+    free(fileSizes);
 }
 
 
-static int BMK_syntheticTest(int cLevel, double compressibility)
+static void BMK_syntheticTest(int cLevel, double compressibility)
 {
+    char name[20] = {0};
     size_t benchedSize = 10000000;
     void* srcBuffer = malloc(benchedSize);
-    int result=0;
-    char name[20] = {0};
 
     /* Memory allocation */
-    if (!srcBuffer)
+    if (!srcBuffer) EXM_THROW(21, "not enough memory");
-    {
-        DISPLAY("\nError: not enough memory!\n");
-        free(srcBuffer);
-        return 12;
-    }
 
     /* Fill input buffer */
-    BMK_datagen(srcBuffer, benchedSize, compressibility, 0);
+    RDG_genBuffer(srcBuffer, benchedSize, compressibility, 0.0, 0);
 
     /* Bench */
-#ifdef _MSC_VER
+    snprintf (name, sizeof(name), "Synthetic %2u%%", (unsigned)(compressibility*100));
-    sprintf_s(name, 20, "Synthetic %2u%%", (unsigned)(compressibility*100));
+    BMK_benchCLevel(srcBuffer, benchedSize, name, cLevel, &benchedSize, 1, NULL, 0);
-#else
-    snprintf (name, 20, "Synthetic %2u%%", (unsigned)(compressibility*100));
-#endif
-    /* Bench */
-    if (cLevel<0)
-    {
-        int l;
-        for (l=1; l <= -cLevel; l++)
-            result = BMK_benchMem(srcBuffer, benchedSize, name, l);
-    }
-    else
-        result = BMK_benchMem(srcBuffer, benchedSize, name, cLevel);
 
-    /* End */
+    /* clean up */
     free(srcBuffer);
-    DISPLAY("\n");
-    return result;
 }
 
 
-int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles, unsigned cLevel)
+int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles,
+                   const char* dictFileName, int cLevel)
 {
     double compressibility = (double)g_compressibilityDefault / 100;
 
     if (nbFiles == 0)
-    {
         BMK_syntheticTest(cLevel, compressibility);
-    }
     else
-    {
+        BMK_benchFileTable(fileNamesTable, nbFiles, dictFileName, cLevel);
-        /* Loop for each file */
-        unsigned fileIdx = 0;
-        while (fileIdx<nbFiles)
-        {
-            BMK_benchOneFile(fileNamesTable[fileIdx], cLevel);
-            fileIdx++;
-        }
-    }
     return 0;
 }
 

programs/bench.h

@@ -26,7 +26,8 @@
 
 
 /* Main function */
-int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles, unsigned cLevel);
+int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles,
+                   const char* dictFileName, int cLevel);
 
 /* Set Parameters */
 void BMK_SetNbIterations(int nbLoops);

programs/datagen.c

@@ -173,6 +173,7 @@ void RDG_genBlock(void* buffer, size_t buffSize, size_t prefixSize, double match
             U32 repeatOffset = (RDG_rand(seed) & 15) == 2;
             if (repeatOffset) offset = prevOffset;
             if (offset > pos) offset = (U32)pos;
+            prevOffset = offset;
             match = pos - offset;
             d = pos + length;
             if (d > buffSize) d = buffSize;

programs/datagen.h

@@ -28,7 +28,7 @@
 
 void RDG_genStdout(unsigned long long size, double matchProba, double litProba, unsigned seed);
 void RDG_genBuffer(void* buffer, size_t size, double matchProba, double litProba, unsigned seed);
-/* RDG_genBuffer
+/*!RDG_genBuffer
    Generate 'size' bytes of compressible data into 'buffer'.
    Compressibility can be controlled using 'matchProba', which is floating point value between 0 and 1.
    'LitProba' is optional, it affect variability of individual bytes. If litProba==0.0, default value will be used.

programs/fileio.c

@@ -121,6 +121,7 @@
 
 #define CACHELINE 64
 
+#define MAX_DICT_SIZE (512 KB)
 
 /* *************************************
 *  Macros
@@ -174,52 +175,6 @@ static unsigned FIO_GetMilliSpan(clock_t nPrevious)
 }
 
 
-static void FIO_getFileHandles(FILE** pfinput, FILE** pfoutput, const char* input_filename, const char* output_filename)
-{
-    if (!strcmp (input_filename, stdinmark))
-    {
-        DISPLAYLEVEL(4,"Using stdin for input\n");
-        *pfinput = stdin;
-        SET_BINARY_MODE(stdin);
-    }
-    else
-    {
-        *pfinput = fopen(input_filename, "rb");
-    }
-
-    if (!strcmp (output_filename, stdoutmark))
-    {
-        DISPLAYLEVEL(4,"Using stdout for output\n");
-        *pfoutput = stdout;
-        SET_BINARY_MODE(stdout);
-    }
-    else
-    {
-        /* Check if destination file already exists */
-        *pfoutput=0;
-        if (strcmp(output_filename,nulmark)) *pfoutput = fopen( output_filename, "rb" );
-        if (*pfoutput!=0)
-        {
-            fclose(*pfoutput);
-            if (!g_overwrite)
-            {
-                char ch;
-                if (g_displayLevel <= 1)   /* No interaction possible */
-                    EXM_THROW(11, "Operation aborted : %s already exists", output_filename);
-                DISPLAYLEVEL(2, "Warning : %s already exists\n", output_filename);
-                DISPLAYLEVEL(2, "Overwrite ? (Y/N) : ");
-                ch = (char)getchar();
-                if ((ch!='Y') && (ch!='y')) EXM_THROW(11, "Operation aborted : %s already exists", output_filename);
-            }
-        }
-        *pfoutput = fopen( output_filename, "wb" );
-    }
-
-    if ( *pfinput==0 ) EXM_THROW(12, "Pb opening src : %s", input_filename);
-    if ( *pfoutput==0) EXM_THROW(13, "Pb opening dst : %s", output_filename);
-}
-
-
 static U64 FIO_getFileSize(const char* infilename)
 {
     int r;
@@ -235,39 +190,182 @@ static U64 FIO_getFileSize(const char* infilename)
 }
 
 
-unsigned long long FIO_compressFilename(const char* output_filename, const char* input_filename, int cLevel)
+static int FIO_getFiles(FILE** fileOutPtr, FILE** fileInPtr,
+                        const char* dstFileName, const char* srcFileName)
 {
-    U64 filesize = 0;
+    if (!strcmp (srcFileName, stdinmark))
-    U64 compressedfilesize = 0;
+    {
-    BYTE* inBuff;
+        DISPLAYLEVEL(4,"Using stdin for input\n");
-    BYTE* outBuff;
+        *fileInPtr = stdin;
-    size_t inBuffSize = ZBUFF_recommendedCInSize();
+        SET_BINARY_MODE(stdin);
-    size_t outBuffSize = ZBUFF_recommendedCOutSize();
+    }
-    FILE* finput;
+    else
-    FILE* foutput;
+    {
-    size_t sizeCheck, errorCode;
+        *fileInPtr = fopen(srcFileName, "rb");
+    }
+
+    if ( *fileInPtr==0 )
+    {
+        DISPLAYLEVEL(1, "Unable to access file for processing: %s\n", srcFileName);
+        return 1;
+    }
+
+    if (!strcmp (dstFileName, stdoutmark))
+    {
+        DISPLAYLEVEL(4,"Using stdout for output\n");
+        *fileOutPtr = stdout;
+        SET_BINARY_MODE(stdout);
+    }
+    else
+    {
+        /* Check if destination file already exists */
+        if (!g_overwrite)
+        {
+            *fileOutPtr = fopen( dstFileName, "rb" );
+            if (*fileOutPtr != 0)
+            {
+                /* prompt for overwrite authorization */
+                int ch = 'N';
+                fclose(*fileOutPtr);
+                DISPLAY("Warning : %s already exists \n", dstFileName);
+                if ((g_displayLevel <= 1) || (*fileInPtr == stdin))
+                {
+                    /* No interaction possible */
+                    DISPLAY("Operation aborted : %s already exists \n", dstFileName);
+                    return 1;
+                }
+                DISPLAY("Overwrite ? (y/N) : ");
+                while((ch = getchar()) != '\n' && ch != EOF);   /* flush integrated */
+                if ((ch!='Y') && (ch!='y'))
+                {
+                    DISPLAY("No. Operation aborted : %s already exists \n", dstFileName);
+                    return 1;
+                }
+            }
+        }
+        *fileOutPtr = fopen( dstFileName, "wb" );
+    }
+
+    if (*fileOutPtr==0) EXM_THROW(13, "Pb opening %s", dstFileName);
+
+    return 0;
+}
+
+/*!FIO_loadFile
+*  creates a buffer, pointed by *bufferPtr,
+*  loads "filename" content into it
+*  up to MAX_DICT_SIZE bytes
+*/
+static size_t FIO_loadFile(void** bufferPtr, const char* fileName)
+{
+    FILE* fileHandle;
+    size_t readSize;
+    U64 fileSize;
+
+    *bufferPtr = NULL;
+    if (fileName == NULL)
+        return 0;
+
+    DISPLAYLEVEL(4,"Loading %s as dictionary \n", fileName);
+    fileHandle = fopen(fileName, "rb");
+    if (fileHandle==0) EXM_THROW(31, "Error opening file %s", fileName);
+    fileSize = FIO_getFileSize(fileName);
+    if (fileSize > MAX_DICT_SIZE)
+    {
+        int seekResult;
+        if (fileSize > 1 GB) EXM_THROW(32, "Dictionary file %s is too large", fileName);   /* avoid extreme cases */
+        DISPLAYLEVEL(2,"Dictionary %s is too large : using last %u bytes only \n", fileName, MAX_DICT_SIZE);
+        seekResult = fseek(fileHandle, (long int)(fileSize-MAX_DICT_SIZE), SEEK_SET);   /* use end of file */
+        if (seekResult != 0) EXM_THROW(33, "Error seeking into file %s", fileName);
+        fileSize = MAX_DICT_SIZE;
+    }
+    *bufferPtr = (BYTE*)malloc((size_t)fileSize);
+    if (*bufferPtr==NULL) EXM_THROW(34, "Allocation error : not enough memory for dictBuffer");
+    readSize = fread(*bufferPtr, 1, (size_t)fileSize, fileHandle);
+    if (readSize!=fileSize) EXM_THROW(35, "Error reading dictionary file %s", fileName);
+    fclose(fileHandle);
+    return (size_t)fileSize;
+}
+
+
+/* **********************************************************************
+*  Compression
+************************************************************************/
+typedef struct {
+    void*  srcBuffer;
+    size_t srcBufferSize;
+    void*  dstBuffer;
+    size_t dstBufferSize;
+    void*  dictBuffer;
+    size_t dictBufferSize;
     ZBUFF_CCtx* ctx;
+} cRess_t;
+
+static cRess_t FIO_createCResources(const char* dictFileName)
+{
+    cRess_t ress;
+
+    ress.ctx = ZBUFF_createCCtx();
+    if (ress.ctx == NULL) EXM_THROW(30, "Allocation error : can't create ZBUFF context");
 
     /* Allocate Memory */
-    ctx = ZBUFF_createCCtx();
+    ress.srcBufferSize = ZBUFF_recommendedCInSize();
-    inBuff  = (BYTE*)malloc(inBuffSize);
+    ress.srcBuffer = malloc(ress.srcBufferSize);
-    outBuff = (BYTE*)malloc(outBuffSize);
+    ress.dstBufferSize = ZBUFF_recommendedCOutSize();
-    if (!inBuff || !outBuff || !ctx) EXM_THROW(21, "Allocation error : not enough memory");
+    ress.dstBuffer = malloc(ress.dstBufferSize);
+    if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(31, "Allocation error : not enough memory");
+
+    /* dictionary */
+    ress.dictBufferSize = FIO_loadFile(&(ress.dictBuffer), dictFileName);
+
+    return ress;
+}
+
+static void FIO_freeCResources(cRess_t ress)
+{
+    size_t errorCode;
+    free(ress.srcBuffer);
+    free(ress.dstBuffer);
+    free(ress.dictBuffer);
+    errorCode = ZBUFF_freeCCtx(ress.ctx);
+    if (ZBUFF_isError(errorCode)) EXM_THROW(38, "Error : can't release ZBUFF context resource : %s", ZBUFF_getErrorName(errorCode));
+}
+
+
+/*
+ * FIO_compressFilename_extRess()
+ * result : 0 : compression completed correctly
+ *          1 : missing or pb opening srcFileName
+ */
+static int FIO_compressFilename_extRess(cRess_t ress,
+                                        const char* dstFileName, const char* srcFileName,
+                                        int cLevel)
+{
+    FILE* srcFile;
+    FILE* dstFile;
+    U64 filesize = 0;
+    U64 compressedfilesize = 0;
+    size_t dictSize = ress.dictBufferSize;
+    size_t sizeCheck, errorCode;
+
+    /* File check */
+    if (FIO_getFiles(&dstFile, &srcFile, dstFileName, srcFileName)) return 1;
 
     /* init */
-    FIO_getFileHandles(&finput, &foutput, input_filename, output_filename);
+    filesize = FIO_getFileSize(srcFileName) + dictSize;
-    filesize = FIO_getFileSize(input_filename);
+    errorCode = ZBUFF_compressInit_advanced(ress.ctx, ZSTD_getParams(cLevel, filesize));
-    errorCode = ZBUFF_compressInit_advanced(ctx, ZSTD_getParams(cLevel, filesize));
+    if (ZBUFF_isError(errorCode)) EXM_THROW(21, "Error initializing compression");
-    if (ZBUFF_isError(errorCode)) EXM_THROW(22, "Error initializing compression");
+    errorCode = ZBUFF_compressWithDictionary(ress.ctx, ress.dictBuffer, ress.dictBufferSize);
-    filesize = 0;
+    if (ZBUFF_isError(errorCode)) EXM_THROW(22, "Error initializing dictionary");
 
     /* Main compression loop */
+    filesize = 0;
     while (1)
     {
         size_t inSize;
 
         /* Fill input Buffer */
-        inSize = fread(inBuff, (size_t)1, inBuffSize, finput);
+        inSize = fread(ress.srcBuffer, (size_t)1, ress.srcBufferSize, srcFile);
         if (inSize==0) break;
         filesize += inSize;
         DISPLAYUPDATE(2, "\rRead : %u MB  ", (U32)(filesize>>20));
@@ -275,8 +373,8 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
         {
             /* Compress (buffered streaming ensures appropriate formatting) */
             size_t usedInSize = inSize;
-            size_t cSize = outBuffSize;
+            size_t cSize = ress.dstBufferSize;
-            size_t result = ZBUFF_compressContinue(ctx, outBuff, &cSize, inBuff, &usedInSize);
+            size_t result = ZBUFF_compressContinue(ress.ctx, ress.dstBuffer, &cSize, ress.srcBuffer, &usedInSize);
             if (ZBUFF_isError(result))
                 EXM_THROW(23, "Compression error : %s ", ZBUFF_getErrorName(result));
             if (inSize != usedInSize)
@@ -284,8 +382,8 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
                 EXM_THROW(24, "Compression error : input block not fully consumed");
 
             /* Write cBlock */
-            sizeCheck = fwrite(outBuff, 1, cSize, foutput);
+            sizeCheck = fwrite(ress.dstBuffer, 1, cSize, dstFile);
-            if (sizeCheck!=cSize) EXM_THROW(25, "Write error : cannot write compressed block into %s", output_filename);
+            if (sizeCheck!=cSize) EXM_THROW(25, "Write error : cannot write compressed block into %s", dstFileName);
             compressedfilesize += cSize;
         }
 
@@ -294,12 +392,12 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
 
     /* End of Frame */
     {
-        size_t cSize = outBuffSize;
+        size_t cSize = ress.dstBufferSize;
-        size_t result = ZBUFF_compressEnd(ctx, outBuff, &cSize);
+        size_t result = ZBUFF_compressEnd(ress.ctx, ress.dstBuffer, &cSize);
         if (result!=0) EXM_THROW(26, "Compression error : cannot create frame end");
 
-        sizeCheck = fwrite(outBuff, 1, cSize, foutput);
+        sizeCheck = fwrite(ress.dstBuffer, 1, cSize, dstFile);
-        if (sizeCheck!=cSize) EXM_THROW(27, "Write error : cannot write frame end into %s", output_filename);
+        if (sizeCheck!=cSize) EXM_THROW(27, "Write error : cannot write frame end into %s", dstFileName);
         compressedfilesize += cSize;
     }
 
@@ -309,49 +407,149 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
         (unsigned long long) filesize, (unsigned long long) compressedfilesize, (double)compressedfilesize/filesize*100);
 
     /* clean */
-    free(inBuff);
+    fclose(srcFile);
-    free(outBuff);
+    if (fclose(dstFile)) EXM_THROW(28, "Write error : cannot properly close %s", dstFileName);
-    ZBUFF_freeCCtx(ctx);
-    fclose(finput);
-    if (fclose(foutput)) EXM_THROW(28, "Write error : cannot properly close %s", output_filename);
 
-    return compressedfilesize;
+    return 0;
 }
 
 
-unsigned long long FIO_decompressFrame(FILE* foutput, FILE* finput,
+int FIO_compressFilename(const char* dstFileName, const char* srcFileName,
-                                       BYTE* inBuff, size_t inBuffSize, size_t alreadyLoaded,
+                         const char* dictFileName, int compressionLevel)
-                                       BYTE* outBuff, size_t outBuffSize,
+{
-                                       ZBUFF_DCtx* dctx)
+    clock_t start, end;
+    cRess_t ress;
+    int issueWithSrcFile = 0;
+
+    /* Init */
+    start = clock();
+    ress = FIO_createCResources(dictFileName);
+
+    /* Compress File */
+    issueWithSrcFile += FIO_compressFilename_extRess(ress, dstFileName, srcFileName, compressionLevel);
+
+    /* Free resources */
+    FIO_freeCResources(ress);
+
+    /* Final Status */
+    end = clock();
+    {
+        double seconds = (double)(end - start) / CLOCKS_PER_SEC;
+        DISPLAYLEVEL(4, "Completed in %.2f sec \n", seconds);
+    }
+
+    return issueWithSrcFile;
+}
+
+
+#define FNSPACE 30
+int FIO_compressMultipleFilenames(const char** inFileNamesTable, unsigned nbFiles,
+                                  const char* suffix,
+                                  const char* dictFileName, int compressionLevel)
+{
+    unsigned u;
+    int missed_files = 0;
+    char* dstFileName = (char*)malloc(FNSPACE);
+    size_t dfnSize = FNSPACE;
+    const size_t suffixSize = strlen(suffix);
+    cRess_t ress;
+
+    /* init */
+    ress = FIO_createCResources(dictFileName);
+
+    /* loop on each file */
+    for (u=0; u<nbFiles; u++)
+    {
+        size_t ifnSize = strlen(inFileNamesTable[u]);
+        if (dfnSize <= ifnSize+suffixSize+1) { free(dstFileName); dfnSize = ifnSize + 20; dstFileName = (char*)malloc(dfnSize); }
+        strcpy(dstFileName, inFileNamesTable[u]);
+        strcat(dstFileName, suffix);
+
+        missed_files += FIO_compressFilename_extRess(ress, dstFileName, inFileNamesTable[u], compressionLevel);
+    }
+
+    /* Close & Free */
+    FIO_freeCResources(ress);
+    free(dstFileName);
+
+    return missed_files;
+}
+
+
+/* **************************************************************************
+*  Decompression
+****************************************************************************/
+typedef struct {
+    void*  srcBuffer;
+    size_t srcBufferSize;
+    void*  dstBuffer;
+    size_t dstBufferSize;
+    void*  dictBuffer;
+    size_t dictBufferSize;
+    ZBUFF_DCtx* dctx;
+} dRess_t;
+
+static dRess_t FIO_createDResources(const char* dictFileName)
+{
+    dRess_t ress;
+
+    /* init */
+    ress.dctx = ZBUFF_createDCtx();
+    if (ress.dctx==NULL) EXM_THROW(60, "Can't create ZBUFF decompression context");
+
+    /* Allocate Memory */
+    ress.srcBufferSize = ZBUFF_recommendedDInSize();
+    ress.srcBuffer = malloc(ress.srcBufferSize);
+    ress.dstBufferSize = ZBUFF_recommendedDOutSize();
+    ress.dstBuffer = malloc(ress.dstBufferSize);
+    if (!ress.srcBuffer || !ress.dstBuffer) EXM_THROW(61, "Allocation error : not enough memory");
+
+    /* dictionary */
+    ress.dictBufferSize = FIO_loadFile(&(ress.dictBuffer), dictFileName);
+
+    return ress;
+}
+
+static void FIO_freeDResources(dRess_t ress)
+{
+    size_t errorCode = ZBUFF_freeDCtx(ress.dctx);
+    if (ZBUFF_isError(errorCode)) EXM_THROW(69, "Error : can't free ZBUFF context resource : %s", ZBUFF_getErrorName(errorCode));
+    free(ress.srcBuffer);
+    free(ress.dstBuffer);
+    free(ress.dictBuffer);
+}
+
+
+unsigned long long FIO_decompressFrame(dRess_t ress,
+                                       FILE* foutput, FILE* finput, size_t alreadyLoaded)
 {
     U64    frameSize = 0;
     size_t readSize=alreadyLoaded;
 
     /* Main decompression Loop */
-    ZBUFF_decompressInit(dctx);
+    ZBUFF_decompressInit(ress.dctx);
+    ZBUFF_decompressWithDictionary(ress.dctx, ress.dictBuffer, ress.dictBufferSize);
     while (1)
     {
         /* Decode */
         size_t sizeCheck;
-        size_t inSize=readSize, decodedSize=outBuffSize;
+        size_t inSize=readSize, decodedSize=ress.dstBufferSize;
-        size_t inStart=0;
+        size_t toRead = ZBUFF_decompressContinue(ress.dctx, ress.dstBuffer, &decodedSize, ress.srcBuffer, &inSize);
-        size_t toRead = ZBUFF_decompressContinue(dctx, outBuff, &decodedSize, inBuff+inStart, &inSize);
         if (ZBUFF_isError(toRead)) EXM_THROW(36, "Decoding error : %s", ZBUFF_getErrorName(toRead));
         readSize -= inSize;
-        inStart += inSize;
 
         /* Write block */
-        sizeCheck = fwrite(outBuff, 1, decodedSize, foutput);
+        sizeCheck = fwrite(ress.dstBuffer, 1, decodedSize, foutput);
         if (sizeCheck != decodedSize) EXM_THROW(37, "Write error : unable to write data block to destination file");
         frameSize += decodedSize;
         DISPLAYUPDATE(2, "\rDecoded : %u MB...     ", (U32)(frameSize>>20) );
 
         if (toRead == 0) break;
-        if (readSize) continue;   /* still some data left within inBuff */
+        if (readSize) EXM_THROW(38, "Decoding error : should consume entire input");
 
         /* Fill input buffer */
-        if (toRead > inBuffSize) EXM_THROW(34, "too large block");
+        if (toRead > ress.srcBufferSize) EXM_THROW(34, "too large block");
-        readSize = fread(inBuff, 1, toRead, finput);
+        readSize = fread(ress.srcBuffer, 1, toRead, finput);
         if (readSize != toRead) EXM_THROW(35, "Read error");
     }
 
@@ -359,61 +557,96 @@ unsigned long long FIO_decompressFrame(FILE* foutput, FILE* finput,
 }
 
 
-unsigned long long FIO_decompressFilename(const char* output_filename, const char* input_filename)
+static int FIO_decompressFile_extRess(dRess_t ress,
+                                      const char* dstFileName, const char* srcFileName)
 {
-    FILE* finput, *foutput;
+    unsigned long long filesize = 0;
-    BYTE* inBuff=NULL;
+    FILE* srcFile;
-    size_t inBuffSize = ZBUFF_recommendedDInSize();
+    FILE* dstFile;
-    BYTE* outBuff=NULL;
-    size_t outBuffSize = ZBUFF_recommendedDOutSize();
-    U64   filesize = 0;
-    size_t toRead;
-
 
     /* Init */
-    ZBUFF_DCtx* dctx = ZBUFF_createDCtx();
+    if (FIO_getFiles(&dstFile, &srcFile, dstFileName, srcFileName)) return 1;
-    FIO_getFileHandles(&finput, &foutput, input_filename, output_filename);
-
-    /* Allocate Memory (if needed) */
-    inBuff  = (BYTE*)malloc(inBuffSize);
-    outBuff  = (BYTE*)malloc(outBuffSize);
-    if (!inBuff || !outBuff) EXM_THROW(33, "Allocation error : not enough memory");
 
     /* for each frame */
     for ( ; ; )
     {
-        toRead = 0;
+        size_t sizeCheck;
-
+        /* check magic number -> version */
+        size_t toRead = 4;
+        sizeCheck = fread(ress.srcBuffer, (size_t)1, toRead, srcFile);
+        if (sizeCheck==0) break;   /* no more input */
+        if (sizeCheck != toRead) EXM_THROW(31, "Read error : cannot read header");
 #if defined(ZSTD_LEGACY_SUPPORT) && (ZSTD_LEGACY_SUPPORT==1)
+        if (ZSTD_isLegacy(MEM_readLE32(ress.srcBuffer)))
         {
-            size_t sizeCheck;
+            filesize += FIO_decompressLegacyFrame(dstFile, srcFile, MEM_readLE32(ress.srcBuffer));
-            /* check magic number -> version */
+            continue;
-            toRead = 4;
-            sizeCheck = fread(inBuff, (size_t)1, toRead, finput);
-            if (sizeCheck==0) break;   /* no more input */
-            if (sizeCheck != toRead) EXM_THROW(31, "Read error : cannot read header");
-            if (ZSTD_isLegacy(MEM_readLE32(inBuff)))
-            {
-                filesize += FIO_decompressLegacyFrame(foutput, finput, MEM_readLE32(inBuff));
-                continue;
-            }
         }
 #endif   /* ZSTD_LEGACY_SUPPORT */
 
-        filesize += FIO_decompressFrame(foutput, finput, inBuff, inBuffSize, toRead, outBuff, outBuffSize, dctx);
+        filesize += FIO_decompressFrame(ress, dstFile, srcFile, toRead);
     }
 
+    /* Final Status */
     DISPLAYLEVEL(2, "\r%79s\r", "");
-    DISPLAYLEVEL(2, "Decoded %llu bytes   \n", (long long unsigned)filesize);
+    DISPLAYLEVEL(2, "Successfully decoded %llu bytes \n", filesize);
 
-    /* clean */
+    /* Close */
-    free(inBuff);
+    fclose(srcFile);
-    free(outBuff);
+    if (fclose(dstFile)) EXM_THROW(38, "Write error : cannot properly close %s", dstFileName);
-    ZBUFF_freeDCtx(dctx);
-    fclose(finput);
-    if (fclose(foutput)) EXM_THROW(38, "Write error : cannot properly close %s", output_filename);
 
-    return filesize;
+    return 0;
 }
 
 
+int FIO_decompressFilename(const char* dstFileName, const char* srcFileName,
+                           const char* dictFileName)
+{
+    int missingFiles = 0;
+    dRess_t ress = FIO_createDResources(dictFileName);
+
+    missingFiles += FIO_decompressFile_extRess(ress, dstFileName, srcFileName);
+
+    FIO_freeDResources(ress);
+    return missingFiles;
+}
+
+
+#define MAXSUFFIXSIZE 8
+int FIO_decompressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
+                                    const char* suffix,
+                                    const char* dictFileName)
+{
+    unsigned u;
+    int skippedFiles = 0;
+    int missingFiles = 0;
+    char* dstFileName = (char*)malloc(FNSPACE);
+    size_t dfnSize = FNSPACE;
+    const size_t suffixSize = strlen(suffix);
+    dRess_t ress;
+
+	if (dstFileName==NULL) EXM_THROW(70, "not enough memory for dstFileName");
+    ress = FIO_createDResources(dictFileName);
+
+    for (u=0; u<nbFiles; u++)
+    {
+        const char* srcFileName = srcNamesTable[u];
+        size_t sfnSize = strlen(srcFileName);
+        const char* suffixPtr = srcFileName + sfnSize - suffixSize;
+        if (dfnSize <= sfnSize-suffixSize+1) { free(dstFileName); dfnSize = sfnSize + 20; dstFileName = (char*)malloc(dfnSize); if (dstFileName==NULL) EXM_THROW(71, "not enough memory for dstFileName"); }
+        if (sfnSize <= suffixSize  ||  strcmp(suffixPtr, suffix) != 0)
+        {
+            DISPLAYLEVEL(1, "File extension doesn't match expected extension (%4s); will not process file: %s\n", suffix, srcFileName);
+            skippedFiles++;
+            continue;
+        }
+        memcpy(dstFileName, srcFileName, sfnSize - suffixSize);
+        dstFileName[sfnSize-suffixSize] = '\0';
+
+        missingFiles += FIO_decompressFile_extRess(ress, dstFileName, srcFileName);
+    }
+
+    FIO_freeDResources(ress);
+    free(dstFileName);
+    return missingFiles + skippedFiles;
+}

programs/fileio.h

@@ -50,19 +50,35 @@ void FIO_setNotificationLevel(unsigned level);
 
 
 /* *************************************
-*  Stream/File functions
+*  Single File functions
 ***************************************/
-unsigned long long FIO_compressFilename (const char* outfilename, const char* infilename, int compressionLevel);
+int FIO_compressFilename (const char* outfilename, const char* infilename, const char* dictFileName, int compressionLevel);
-unsigned long long FIO_decompressFilename (const char* outfilename, const char* infilename);
+int FIO_decompressFilename (const char* outfilename, const char* infilename, const char* dictFileName);
 /**
 FIO_compressFilename :
-    @result : size of compressed file
+    @result : 0 == ok;  1 == pb with src file.
 
 FIO_decompressFilename :
-    @result : size of regenerated file
+    @result : 0 == ok;  1 == pb with src file.
 */
 
 
+/* *************************************
+*  Multiple File functions
+***************************************/
+int FIO_compressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
+                                  const char* suffix,
+                                  const char* dictFileName, int compressionLevel);
+int FIO_decompressMultipleFilenames(const char** srcNamesTable, unsigned nbFiles,
+                                    const char* suffix,
+                                    const char* dictFileName);
+/**
+FIO_compressMultipleFilenames :
+    @result : nb of missing files
+FIO_decompressMultipleFilenames :
+    @result : nb of missing or skipped files
+*/
+
 
 #if defined (__cplusplus)
 }

programs/fullbench.c

@@ -235,7 +235,7 @@ size_t local_ZSTD_decodeLiteralsBlock(void* dst, size_t dstSize, void* buff2, co
 
 size_t local_ZSTD_decodeSeqHeaders(void* dst, size_t dstSize, void* buff2, const void* src, size_t srcSize)
 {
-    U32 DTableML[1<<11], DTableLL[1<<10], DTableOffb[1<<9];
+    U32 DTableML[FSE_DTABLE_SIZE_U32(10)], DTableLL[FSE_DTABLE_SIZE_U32(10)], DTableOffb[FSE_DTABLE_SIZE_U32(9)];   /* MLFSELog, LLFSELog and OffFSELog are not public values */
     const BYTE* dumps;
     size_t length;
     int nbSeq;
@@ -245,7 +245,6 @@ size_t local_ZSTD_decodeSeqHeaders(void* dst, size_t dstSize, void* buff2, const
 
 
 
-
 /*********************************************************
 *  Bench functions
 *********************************************************/
@@ -429,7 +428,7 @@ int benchFiles(char** fileNamesTable, int nbFiles, U32 benchNb)
             return 11;
         }
 
-        // Memory allocation & restrictions
+        /* Memory allocation & restrictions */
         inFileSize = BMK_GetFileSize(inFileName);
         benchedSize = (size_t) BMK_findMaxMem(inFileSize*3) / 3;
         if ((U64)benchedSize > inFileSize) benchedSize = (size_t)inFileSize;

programs/fuzzer.c

@@ -79,11 +79,13 @@ static const U32 prime2 = 2246822519U;
 static U32 g_displayLevel = 2;
 
 #define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
-            if ((FUZ_GetMilliSpan(g_time) > g_refreshRate) || (g_displayLevel>=4)) \
+            if ((FUZ_GetMilliSpan(g_displayTime) > g_refreshRate) || (g_displayLevel>=4)) \
-            { g_time = FUZ_GetMilliStart(); DISPLAY(__VA_ARGS__); \
+            { g_displayTime = FUZ_GetMilliStart(); DISPLAY(__VA_ARGS__); \
             if (g_displayLevel>=4) fflush(stdout); } }
 static const U32 g_refreshRate = 150;
-static U32 g_time = 0;
+static U32 g_displayTime = 0;
+
+static U32 g_testTime = 0;
 
 
 /*********************************************************
@@ -259,6 +261,7 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
     BYTE* srcBuffer;
     BYTE* cBuffer;
     BYTE* dstBuffer;
+    BYTE* mirrorBuffer;
     size_t srcBufferSize = (size_t)1<<maxSrcLog;
     size_t dstBufferSize = (size_t)1<<maxSampleLog;
     size_t cBufferSize   = ZSTD_compressBound(dstBufferSize);
@@ -266,17 +269,22 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
     U32 testNb = 0;
     U32 coreSeed = seed, lseed = 0;
     ZSTD_CCtx* ctx;
+    ZSTD_DCtx* dctx;
+    U32 startTime = FUZ_GetMilliStart();
 
     /* allocation */
     ctx = ZSTD_createCCtx();
+    dctx= ZSTD_createDCtx();
     cNoiseBuffer[0] = (BYTE*)malloc (srcBufferSize);
     cNoiseBuffer[1] = (BYTE*)malloc (srcBufferSize);
     cNoiseBuffer[2] = (BYTE*)malloc (srcBufferSize);
     cNoiseBuffer[3] = (BYTE*)malloc (srcBufferSize);
     cNoiseBuffer[4] = (BYTE*)malloc (srcBufferSize);
     dstBuffer = (BYTE*)malloc (dstBufferSize);
+    mirrorBuffer = (BYTE*)malloc (dstBufferSize);
     cBuffer   = (BYTE*)malloc (cBufferSize);
-    CHECK (!cNoiseBuffer[0] || !cNoiseBuffer[1] || !cNoiseBuffer[2] || !dstBuffer || !cBuffer || !ctx,
+    CHECK (!cNoiseBuffer[0] || !cNoiseBuffer[1] || !cNoiseBuffer[2] || !cNoiseBuffer[3] || !cNoiseBuffer[4]
+           || !dstBuffer || !mirrorBuffer || !cBuffer || !ctx || !dctx,
            "Not enough memory, fuzzer tests cancelled");
 
     /* Create initial samples */
@@ -292,17 +300,23 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
         FUZ_rand(&coreSeed);
 
     /* test loop */
-    for ( ; testNb <= nbTests; testNb++ )
+    for ( ; (testNb <= nbTests) || (FUZ_GetMilliSpan(startTime) < g_testTime); testNb++ )
     {
-        size_t sampleSize, sampleStart;
+        size_t sampleSize, sampleStart, maxTestSize, totalTestSize;
-        size_t cSize, dSize, dSupSize;
+        size_t cSize, dSize, dSupSize, errorCode, totalCSize, totalGenSize;
-        U32 sampleSizeLog, buffNb, cLevelMod;
+        U32 sampleSizeLog, buffNb, cLevelMod, nbChunks, n;
+        XXH64_state_t crc64;
         U64 crcOrig, crcDest;
         int cLevel;
         BYTE* sampleBuffer;
+        const BYTE* dict;
+        size_t dictSize;
 
         /* init */
-        DISPLAYUPDATE(2, "\r%6u/%6u   ", testNb, nbTests);
+        if (nbTests >= testNb)
+             { DISPLAYUPDATE(2, "\r%6u/%6u    ", testNb, nbTests); }
+        else { DISPLAYUPDATE(2, "\r%6u      ", testNb); }
+
         FUZ_rand(&coreSeed);
         lseed = coreSeed ^ prime1;
         buffNb = FUZ_rand(&lseed) & 127;
@@ -342,7 +356,6 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
         /* compression failure test : too small dest buffer */
         if (cSize > 3)
         {
-            size_t errorCode;
             const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1;   /* no problem, as cSize > 4 (frameHeaderSizer) */
             const size_t tooSmallSize = cSize - missing;
             static const U32 endMark = 0x4DC2B1A9;
@@ -365,7 +378,6 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
 
         /* truncated src decompression test */
         {
-            size_t errorCode;
             const size_t missing = (FUZ_rand(&lseed) % (cSize-2)) + 1;   /* no problem, as cSize > 4 (frameHeaderSizer) */
             const size_t tooSmallSize = cSize - missing;
             void* cBufferTooSmall = malloc(tooSmallSize);   /* valgrind will catch overflows */
@@ -379,7 +391,6 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
         /* too small dst decompression test */
         if (sampleSize > 3)
         {
-            size_t errorCode;
             const size_t missing = (FUZ_rand(&lseed) % (sampleSize-2)) + 1;   /* no problem, as cSize > 4 (frameHeaderSizer) */
             const size_t tooSmallSize = sampleSize - missing;
             static const BYTE token = 0xA9;
@@ -424,7 +435,6 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
                 U32 noiseSrc = FUZ_rand(&lseed) % 5;
                 const U32 endMark = 0xA9B1C3D6;
                 U32 endCheck;
-                size_t errorCode;
                 srcBuffer = cNoiseBuffer[noiseSrc];
                 memcpy(dstBuffer+sampleSize, &endMark, 4);
                 errorCode = ZSTD_decompress(dstBuffer, sampleSize, cBuffer, cSize);
@@ -435,11 +445,80 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
                 CHECK(endMark!=endCheck, "ZSTD_decompress on noisy src : dst buffer overflow");
             }
         }
+
+        /* Streaming compression of scattered segments test */
+        XXH64_reset(&crc64, 0);
+        nbChunks = (FUZ_rand(&lseed) & 127) + 2;
+        sampleSizeLog = FUZ_rand(&lseed) % maxSrcLog;
+        maxTestSize = (size_t)1 << sampleSizeLog;
+        maxTestSize += FUZ_rand(&lseed) & (maxTestSize-1);
+        if (maxTestSize >= dstBufferSize) maxTestSize = dstBufferSize-1;
+
+        sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
+        sampleSize = (size_t)1 << sampleSizeLog;
+        sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
+        sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
+        dict = srcBuffer + sampleStart;
+        dictSize = sampleSize;
+
+        cSize = ZSTD_compressBegin(ctx, cBuffer, cBufferSize, (FUZ_rand(&lseed) % (20 - (sampleSizeLog/3))) + 1);
+        errorCode = ZSTD_compress_insertDictionary(ctx, dict, dictSize);
+        CHECK (ZSTD_isError(errorCode), "dictionary insertion error : %s", ZSTD_getErrorName(errorCode));
+        totalTestSize = 0;
+        for (n=0; n<nbChunks; n++)
+        {
+            sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
+            sampleSize = (size_t)1 << sampleSizeLog;
+            sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
+            sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
+
+            if (cBufferSize-cSize < ZSTD_compressBound(sampleSize))
+                /* avoid invalid dstBufferTooSmall */
+                break;
+            if (totalTestSize+sampleSize > maxTestSize) break;
+
+            errorCode = ZSTD_compressContinue(ctx, cBuffer+cSize, cBufferSize-cSize, srcBuffer+sampleStart, sampleSize);
+            CHECK (ZSTD_isError(errorCode), "multi-segments compression error : %s", ZSTD_getErrorName(errorCode));
+            cSize += errorCode;
+
+            XXH64_update(&crc64, srcBuffer+sampleStart, sampleSize);
+            memcpy(mirrorBuffer + totalTestSize, srcBuffer+sampleStart, sampleSize);
+            totalTestSize += sampleSize;
+        }
+        errorCode = ZSTD_compressEnd(ctx, cBuffer+cSize, cBufferSize-cSize);
+        CHECK (ZSTD_isError(errorCode), "multi-segments epilogue error : %s", ZSTD_getErrorName(errorCode));
+        cSize += errorCode;
+        crcOrig = XXH64_digest(&crc64);
+
+        /* streaming decompression test */
+        errorCode = ZSTD_resetDCtx(dctx);
+        CHECK (ZSTD_isError(errorCode), "cannot init DCtx : %s", ZSTD_getErrorName(errorCode));
+        ZSTD_decompress_insertDictionary(dctx, dict, dictSize);
+        totalCSize = 0;
+        totalGenSize = 0;
+        while (totalCSize < cSize)
+        {
+            size_t inSize = ZSTD_nextSrcSizeToDecompress(dctx);
+            size_t genSize = ZSTD_decompressContinue(dctx, dstBuffer+totalGenSize, dstBufferSize-totalGenSize, cBuffer+totalCSize, inSize);
+            CHECK (ZSTD_isError(genSize), "streaming decompression error : %s", ZSTD_getErrorName(genSize));
+            totalGenSize += genSize;
+            totalCSize += inSize;
+        }
+        CHECK (ZSTD_nextSrcSizeToDecompress(dctx) != 0, "frame not fully decoded");
+        CHECK (totalGenSize != totalTestSize, "decompressed data : wrong size")
+        CHECK (totalCSize != cSize, "compressed data should be fully read")
+        crcDest = XXH64(dstBuffer, totalTestSize, 0);
+        if (crcDest!=crcOrig)
+            errorCode = findDiff(mirrorBuffer, dstBuffer, totalTestSize);
+        CHECK (crcDest!=crcOrig, "streaming decompressed data corrupted : byte %u / %u  (%02X!=%02X)",
+               (U32)errorCode, (U32)totalTestSize, dstBuffer[errorCode], mirrorBuffer[errorCode]);
+
     }
-    DISPLAY("\rAll fuzzer tests completed   \n");
+    DISPLAY("\r%u fuzzer tests completed   \n", testNb-1);
 
 _cleanup:
     ZSTD_freeCCtx(ctx);
+    ZSTD_freeDCtx(dctx);
     free(cNoiseBuffer[0]);
     free(cNoiseBuffer[1]);
     free(cNoiseBuffer[2]);
@@ -447,6 +526,7 @@ _cleanup:
     free(cNoiseBuffer[4]);
     free(cBuffer);
     free(dstBuffer);
+    free(mirrorBuffer);
     return result;
 
 _output_error:
@@ -520,7 +600,7 @@ int main(int argc, char** argv)
                     break;
 
                 case 'i':
-                    argument++;
+                    argument++; g_testTime=0;
                     nbTests=0;
                     while ((*argument>='0') && (*argument<='9'))
                     {
@@ -530,6 +610,20 @@ int main(int argc, char** argv)
                     }
                     break;
 
+                case 'T':
+                    argument++;
+                    nbTests=0; g_testTime=0;
+                    while ((*argument>='0') && (*argument<='9'))
+                    {
+                        g_testTime *= 10;
+                        g_testTime += *argument - '0';
+                        argument++;
+                    }
+                    if (*argument=='m') g_testTime *=60, argument++;
+                    if (*argument=='n') argument++;
+                    g_testTime *= 1000;
+                    break;
+
                 case 's':
                     argument++;
                     seed=0;
@@ -580,8 +674,6 @@ int main(int argc, char** argv)
     DISPLAY("Seed = %u\n", seed);
     if (proba!=FUZ_COMPRESSIBILITY_DEFAULT) DISPLAY("Compressibility : %i%%\n", proba);
 
-    if (nbTests<=0) nbTests=1;
-
     if (testNb==0) result = basicUnitTests(0, ((double)proba) / 100);  /* constant seed for predictability */
     if (!result)
         result = fuzzerTests(seed, nbTests, testNb, ((double)proba) / 100);

programs/paramgrill.c

@@ -342,6 +342,7 @@ static size_t BMK_benchParam(BMK_result_t* resultPtr,
                     blockTable[blockNb].cSize = ZSTD_compress_advanced(ctx,
                                                     blockTable[blockNb].cPtr,  blockTable[blockNb].cRoom,
                                                     blockTable[blockNb].srcPtr, blockTable[blockNb].srcSize,
+                                                    NULL, 0,
                                                     params);
                 nbLoops++;
             }
@@ -681,6 +682,8 @@ static void BMK_selectRandomStart(
         /* totally random entry */
         ZSTD_parameters p;
         potentialRandomParams(&p, 1);
+        p.srcSize = srcSize;
+        ZSTD_validateParams(&p);
         playAround(f, winners, p, srcBuffer, srcSize, ctx);
     }
     else
@@ -734,6 +737,7 @@ static void BMK_benchMem(void* srcBuffer, size_t srcSize)
         for (i=1; i<=maxSeeds; i++)
         {
             params = ZSTD_getParams(i, blockSize);
+            ZSTD_validateParams(&params);
             BMK_seed(winners, params, srcBuffer, srcSize, ctx);
         }
     }

programs/playTests.sh

@@ -0,0 +1,104 @@
+#!/bin/sh -e
+
+die() {
+    echo "$@" 1>&2
+    exit 1
+}
+
+roundTripTest() {
+    if [ -n "$3" ]; then
+        local c="$3"
+        local p="$2"
+    else
+        local c="$2"
+    fi
+
+    rm -f tmp1 tmp2
+    echo "roundTripTest: ./datagen $1 $p | $ZSTD -v$c | $ZSTD -d"
+    ./datagen $1 $p | md5sum > tmp1
+    ./datagen $1 $p | $ZSTD -v$c | $ZSTD -d  | md5sum > tmp2
+    diff -q tmp1 tmp2
+}
+
+[ -n "$ZSTD" ] || die "ZSTD variable must be defined!"
+
+printf "\n**** frame concatenation **** "
+
+echo "hello " > hello.tmp
+echo "world!" > world.tmp
+cat hello.tmp world.tmp > helloworld.tmp
+$ZSTD hello.tmp > hello.zstd
+$ZSTD world.tmp > world.zstd
+cat hello.zstd world.zstd > helloworld.zstd
+$ZSTD -df helloworld.zstd > result.tmp
+cat result.tmp
+sdiff helloworld.tmp result.tmp
+rm ./*.tmp ./*.zstd
+
+echo frame concatenation test completed
+
+echo "**** flush write error test **** "
+
+echo "echo foo | $ZSTD > /dev/full"
+echo foo | $ZSTD > /dev/full && die "write error not detected!"
+echo "echo foo | $ZSTD | $ZSTD -d > /dev/full"
+echo foo | $ZSTD | $ZSTD -d > /dev/full && die "write error not detected!"
+
+
+echo "*** dictionary tests *** "
+
+./datagen > tmpDict
+./datagen -g1M | md5sum > tmp1
+./datagen -g1M | $ZSTD -D tmpDict | $ZSTD -D tmpDict -dv | md5sum > tmp2
+diff -q tmp1 tmp2
+
+echo "*** multiple files tests *** "
+
+./datagen -s1        > tmp1 2> /dev/null
+./datagen -s2 -g100K > tmp2 2> /dev/null
+./datagen -s3 -g1M   > tmp3 2> /dev/null
+$ZSTD -f -m tmp*
+ls -ls tmp*
+rm tmp1 tmp2 tmp3
+$ZSTD -df -m *.zst
+ls -ls tmp*
+$ZSTD -f -m tmp1 notHere tmp2 && die "missing file not detected!"
+rm tmp*
+
+echo "**** zstd round-trip tests **** "
+
+roundTripTest
+roundTripTest '' 6
+
+if [ "$1" != "--test-large-data" ]; then
+    echo "Skipping large data tests"
+    exit 0
+fi
+
+roundTripTest -g270000000 1
+roundTripTest -g270000000 2
+roundTripTest -g270000000 3
+
+roundTripTest -g140000000 -P60 4
+roundTripTest -g140000000 -P60 5
+roundTripTest -g140000000 -P60 6
+
+roundTripTest -g70000000 -P70 7
+roundTripTest -g70000000 -P70 8
+roundTripTest -g70000000 -P70 9
+
+roundTripTest -g35000000 -P75 10
+roundTripTest -g35000000 -P75 11
+roundTripTest -g35000000 -P75 12
+
+roundTripTest -g18000000 -P80 13
+roundTripTest -g18000000 -P80 14
+roundTripTest -g18000000 -P80 15
+roundTripTest -g18000000 -P80 16
+roundTripTest -g18000000 -P80 17
+
+roundTripTest -g50000000 -P94 18
+roundTripTest -g50000000 -P94 19
+
+roundTripTest -g99000000 -P99 20
+roundTripTest -g6000000000 -P99 q

programs/zbufftest.c

@@ -161,6 +161,7 @@ static int basicUnitTests(U32 seed, double compressibility)
     ZBUFF_compressInit(zc, 1);
     readSize = CNBufferSize;
     genSize = compressedBufferSize;
+    ZBUFF_compressWithDictionary(zc, CNBuffer, 128 KB);
     result = ZBUFF_compressContinue(zc, compressedBuffer, &genSize, CNBuffer, &readSize);
     if (ZBUFF_isError(result)) goto _output_error;
     if (readSize != CNBufferSize) goto _output_error;   /* entire input should be consumed */
@@ -174,6 +175,7 @@ static int basicUnitTests(U32 seed, double compressibility)
     /* Basic decompression test */
     DISPLAYLEVEL(4, "test%3i : decompress %u bytes : ", testNb++, COMPRESSIBLE_NOISE_LENGTH);
     ZBUFF_decompressInit(zd);
+    ZBUFF_decompressWithDictionary(zd, CNBuffer, 128 KB);
     readSize = cSize;
     genSize = CNBufferSize;
     result = ZBUFF_decompressContinue(zd, decodedBuffer, &genSize, compressedBuffer, &readSize);
@@ -244,7 +246,6 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
     U32 coreSeed = seed, lseed = 0;
     ZBUFF_CCtx* zc;
     ZBUFF_DCtx* zd;
-    XXH64_state_t crc64;
     U32 startTime = FUZ_GetMilliStart();
 
     /* allocation */
@@ -280,10 +281,12 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
     for ( ; (testNb <= nbTests) || (FUZ_GetMilliSpan(startTime) < g_testTime); testNb++ )
     {
         size_t sampleSize, sampleStart;
-        size_t cSize;
+        const BYTE* dict;
+        size_t cSize, dictSize;
         size_t maxTestSize, totalTestSize, readSize, totalCSize, genSize, totalGenSize;
         size_t errorCode;
         U32 sampleSizeLog, buffNb, n, nbChunks;
+        XXH64_state_t crc64;
         U64 crcOrig, crcDest;
 
         /* init */
@@ -316,6 +319,15 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
         maxTestSize = (size_t)1 << sampleSizeLog;
         maxTestSize += FUZ_rand(&lseed) & (maxTestSize-1);
         ZBUFF_compressInit(zc, (FUZ_rand(&lseed) % (20 - (sampleSizeLog/3))) + 1);
+
+        sampleSizeLog = FUZ_rand(&lseed) % maxSampleLog;
+        sampleSize = (size_t)1 << sampleSizeLog;
+        sampleSize += FUZ_rand(&lseed) & (sampleSize-1);
+        sampleStart = FUZ_rand(&lseed) % (srcBufferSize - sampleSize);
+        dict = srcBuffer + sampleStart;
+        dictSize = sampleSize;
+        ZBUFF_compressWithDictionary(zc, dict, dictSize);
+
         totalTestSize = 0;
         cSize = 0;
         for (n=0; n<nbChunks; n++)
@@ -363,6 +375,7 @@ int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compressibilit
 
         /* multi - fragments decompression test */
         ZBUFF_decompressInit(zd);
+        ZBUFF_decompressWithDictionary(zd, dict, dictSize);
         totalCSize = 0;
         totalGenSize = 0;
         while (totalCSize < cSize)

programs/zstd.1

@@ -31,12 +31,21 @@ is equivalent to
 It is based on the \fBLZ77\fR family, with FSE & huff0 entropy stage.
 zstd offers compression speed > 200 MB/s per core.
 It also features a fast decoder, with speed > 500 MB/s per core.
+
+\fBzstd\fR command line is generally similar to gzip, but features the following differences :
+ - Original files are preserved
+ - By default, \fBzstd file1 file2\fR means : compress file1 \fBinto\fR file2.
+     Use \fB-m\fR command if you want : compress file1 into file1.zstd and file2 into file2.zst
+ - By default, when compressing files, \fBzstd\fR displays advancement notification and result summary.
+     Use \fB-q\fR to turn them off
+
+
 \fBzstd\fR supports the following options :
 
 .SH OPTIONS
 .TP
-.B \-1
+.B \-#
- fast compression (default)
+ # compression level [1-19](default:1)
 .TP
 .B \-d
  decompression
@@ -44,6 +53,14 @@ It also features a fast decoder, with speed > 500 MB/s per core.
 .B \-f
  overwrite output without prompting
 .TP
+.BR \-m ", " --multiple
+ multiple files mode
+ In this mode, multiple files on the command line means compression or decompression of each named file
+ Notifications are also turned off by default
+.TP
+.B \-D
+ Use next file as dictionary content for compress / decompression
+.TP
 .BR \-h/\-H ", " --help
  display help/long help and exit
 .TP
@@ -53,20 +70,17 @@ It also features a fast decoder, with speed > 500 MB/s per core.
 .BR \-v ", " --verbose
  verbose mode
 .TP
-.B \-q
+.BR \-q ", " --quiet
- suppress warnings; specify twice to suppress errors too
+ suppress warnings and notifications; specify twice to suppress errors too
 .TP
 .B \-c 
  force write to standard output, even if it is the console
 .TP
-.B \-t
- test compressed file integrity
-.TP
 .B \-z
  force compression
 .TP
-.B \-b
+.B \-b#
- benchmark file(s)
+ benchmark file(s) using compression level #
 .TP
 .B \-i#
  iteration loops [1-9](default : 3), benchmark mode only

programs/zstdcli.c

@@ -43,23 +43,26 @@
 #include <stdio.h>    /* fprintf, getchar */
 #include <stdlib.h>   /* exit, calloc, free */
 #include <string.h>   /* strcmp, strlen */
-#include "bench.h"    /* BMK_benchFiles, BMK_SetNbIterations */
 #include "fileio.h"
+#ifndef ZSTD_NOBENCH
+#  include "bench.h"  /* BMK_benchFiles, BMK_SetNbIterations */
+#endif
+#include "zstd.h"     /* ZSTD version numbers */
 
 
 /**************************************
 *  OS-specific Includes
 **************************************/
 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__)
-#  include <fcntl.h>    // _O_BINARY
+#  include <fcntl.h>    /* _O_BINARY */
-#  include <io.h>       // _setmode, _isatty
+#  include <io.h>       /* _setmode, _isatty */
 #  ifdef __MINGW32__
    /* int _fileno(FILE *stream);   // seems no longer useful // MINGW somehow forgets to include this windows declaration into <stdio.h> */
 #  endif
 #  define SET_BINARY_MODE(file) _setmode(_fileno(file), _O_BINARY)
 #  define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
 #else
-#  include <unistd.h>   // isatty
+#  include <unistd.h>   /* isatty */
 #  define SET_BINARY_MODE(file)
 #  define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
 #endif
@@ -70,7 +73,9 @@
 **************************************/
 #define COMPRESSOR_NAME "zstd command line interface"
 #ifndef ZSTD_VERSION
-#  define ZSTD_VERSION "v0.4.0"
+#  define QUOTE(str) #str
+#  define EXPAND_AND_QUOTE(str) QUOTE(str)
+#  define ZSTD_VERSION "v" EXPAND_AND_QUOTE(ZSTD_VERSION_MAJOR) "." EXPAND_AND_QUOTE(ZSTD_VERSION_MINOR) "." EXPAND_AND_QUOTE(ZSTD_VERSION_RELEASE)
 #endif
 #define AUTHOR "Yann Collet"
 #define WELCOME_MESSAGE "*** %s %i-bits %s, by %s (%s) ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), ZSTD_VERSION, AUTHOR, __DATE__
@@ -118,8 +123,7 @@ static int usage(const char* programName)
     DISPLAY( "input   : a filename\n");
     DISPLAY( "          with no FILE, or when FILE is - , read standard input\n");
     DISPLAY( "Arguments :\n");
-    DISPLAY( " -1     : Fast compression (default) \n");
+    DISPLAY( " -#     : # compression level (1-19, default:1) \n");
-    DISPLAY( " -9     : High compression \n");
     DISPLAY( " -d     : decompression (default for %s extension)\n", ZSTD_EXTENSION);
     //DISPLAY( " -z     : force compression\n");
     DISPLAY( " -f     : overwrite output without prompting \n");
@@ -136,13 +140,16 @@ static int usage_advanced(const char* programName)
     DISPLAY( " -V     : display Version number and exit\n");
     DISPLAY( " -v     : verbose mode\n");
     DISPLAY( " -q     : suppress warnings; specify twice to suppress errors too\n");
+    DISPLAY( " -m     : multiple input filenames mode \n");
     DISPLAY( " -c     : force write to standard output, even if it is the console\n");
-    //DISPLAY( " -t     : test compressed file integrity\n");
+    DISPLAY( " -D file: use file content as Dictionary \n");
+#ifndef ZSTD_NOBENCH
     DISPLAY( "Benchmark arguments :\n");
     DISPLAY( " -b#    : benchmark file(s), using # compression level (default : 1) \n");
     DISPLAY( " -B#    : cut file into independent blocks of size # (default : no block)\n");
     DISPLAY( " -i#    : iteration loops [1-9](default : 3)\n");
     DISPLAY( " -r#    : test all compression levels from 1 to # (default : disabled)\n");
+#endif
     return 0;
 }
 
@@ -170,31 +177,31 @@ int main(int argCount, const char** argv)
         decode=0,
         forceStdout=0,
         main_pause=0,
-        rangeBench = 1;
+        nextEntryIsDictionary=0,
-    unsigned fileNameStart = 0;
+        multiple=0,
-    unsigned nbFiles = 0;
+        operationResult=0;
     unsigned cLevel = 1;
+    const char** filenameTable = (const char**)malloc(argCount * sizeof(const char*));   /* argCount >= 1 */
+    unsigned filenameIdx = 0;
     const char* programName = argv[0];
-    const char* inFileName = NULL;
     const char* outFileName = NULL;
+    const char* dictFileName = NULL;
     char* dynNameSpace = NULL;
     const char extension[] = ZSTD_EXTENSION;
+    int rangeBench = 1;
 
+    /* init */
+    (void)rangeBench;   /* not used when ZSTD_NOBENCH set */
+    if (filenameTable==NULL) { DISPLAY("not enough memory\n"); exit(1); }
     displayOut = stderr;
-    /* Pick out basename component. Don't rely on stdlib because of conflicting behavior. */
+    /* Pick out program name from path. Don't rely on stdlib because of conflicting behavior */
-    for (i = (int)strlen(programName); i > 0; i--)
+    for (i = (int)strlen(programName); i > 0; i--) { if (programName[i] == '/') { i++; break; } }
-    {
-        if (programName[i] == '/') { i++; break; }
-    }
     programName += i;
 
-    /* zstdcat preset behavior */
+    /* preset behaviors */
+    if (!strcmp(programName, ZSTD_UNZSTD)) decode=1;
     if (!strcmp(programName, ZSTD_CAT)) { decode=1; forceStdout=1; displayLevel=1; outFileName=stdoutmark; }
 
-    /* unzstd preset behavior */
-    if (!strcmp(programName, ZSTD_UNZSTD))
-        decode=1;
-
     /* command switches */
     for(i=1; i<argCount; i++)
     {
@@ -205,7 +212,9 @@ int main(int argCount, const char** argv)
         /* long commands (--long-word) */
         if (!strcmp(argument, "--version")) { displayOut=stdout; DISPLAY(WELCOME_MESSAGE); return 0; }
         if (!strcmp(argument, "--help")) { displayOut=stdout; return usage_advanced(programName); }
+        if (!strcmp(argument, "--multiple")) { multiple=1; continue; }
         if (!strcmp(argument, "--verbose")) { displayLevel=4; continue; }
+        if (!strcmp(argument, "--quiet")) { displayLevel--; continue; }
 
         /* Decode commands (note : aggregated commands are allowed) */
         if (argument[0]=='-')
@@ -213,9 +222,8 @@ int main(int argCount, const char** argv)
             /* '-' means stdin/stdout */
             if (argument[1]==0)
             {
-                if (!inFileName) inFileName=stdinmark;
+                if (!filenameIdx) { filenameIdx=1, filenameTable[0]=stdinmark; continue; }
-                else outFileName=stdoutmark;
+                outFileName=stdoutmark; continue;
-                continue;
             }
 
             argument++;
@@ -248,11 +256,17 @@ int main(int argCount, const char** argv)
                     /* Decoding */
                 case 'd': decode=1; argument++; break;
 
+                    /* Multiple input files */
+                case 'm': multiple=1; argument++; break;
+
                     /* Force stdout, even if stdout==console */
                 case 'c': forceStdout=1; outFileName=stdoutmark; displayLevel=1; argument++; break;
 
-                    // Test
+                    /* Use file content as dictionary */
-                //case 't': decode=1; LZ4IO_setOverwrite(1); output_filename=nulmark; break;
+                case 'D': nextEntryIsDictionary = 1; argument++; break;
+
+                    /* Test -- not implemented */
+                /* case 't': decode=1; LZ4IO_setOverwrite(1); output_filename=nulmark; break; */
 
                     /* Overwrite */
                 case 'f': FIO_overwriteMode(); argument++; break;
@@ -263,9 +277,10 @@ int main(int argCount, const char** argv)
                     /* Quiet mode */
                 case 'q': displayLevel--; argument++; break;
 
-                    /* keep source file (default anyway, so useless; only for xz/lzma compatibility) */
+                    /* keep source file (default anyway, so useless; for gzip/xz compatibility) */
                 case 'k': argument++; break;
 
+#ifndef ZSTD_NOBENCH
                     /* Benchmark */
                 case 'b': bench=1; argument++; break;
 
@@ -299,6 +314,7 @@ int main(int argCount, const char** argv)
                         rangeBench = -1;
                         argument++;
                         break;
+#endif   /* ZSTD_NOBENCH */
 
                     /* Pause at the end (hidden option) */
                 case 'p': main_pause=1; argument++; break;
@@ -310,40 +326,47 @@ int main(int argCount, const char** argv)
             continue;
         }
 
-        /* first provided filename is input */
+        /* dictionary */
-        if (!inFileName) { inFileName = argument; fileNameStart = i; nbFiles = argCount-i; continue; }
+        if (nextEntryIsDictionary)
-
-        /* second provided filename is output */
-        if (!outFileName)
         {
-            outFileName = argument;
+            nextEntryIsDictionary = 0;
-            if (!strcmp (outFileName, nullString)) outFileName = nulmark;
+            dictFileName = argument;
             continue;
         }
+
+        /* add filename to list */
+        filenameTable[filenameIdx++] = argument;
     }
 
     /* Welcome message (if verbose) */
     DISPLAYLEVEL(3, WELCOME_MESSAGE);
 
+    /* Check if benchmark is selected */
+    if (bench)
+    {
+#ifndef ZSTD_NOBENCH
+        BMK_benchFiles(filenameTable, filenameIdx, dictFileName, cLevel*rangeBench);
+#endif
+        goto _end;
+    }
+
     /* No input filename ==> use stdin */
-    if(!inFileName) { inFileName=stdinmark; }
+    if(!filenameIdx) filenameIdx=1, filenameTable[0]=stdinmark;
 
     /* Check if input defined as console; trigger an error in this case */
-    if (!strcmp(inFileName, stdinmark) && IS_CONSOLE(stdin) ) return badusage(programName);
+    if (!strcmp(filenameTable[0], stdinmark) && IS_CONSOLE(stdin) ) return badusage(programName);
-
-    /* Check if benchmark is selected */
-    if (bench) { BMK_benchFiles(argv+fileNameStart, nbFiles, cLevel*rangeBench); goto _end; }
 
     /* No output filename ==> try to select one automatically (when possible) */
-    while (!outFileName)
+    if (filenameIdx>=2) outFileName = filenameTable[1];
+    while (!outFileName)   /* while : just to allow break statement */
     {
         if (!IS_CONSOLE(stdout)) { outFileName=stdoutmark; break; }   /* Default to stdout whenever possible (i.e. not a console) */
         if (!decode)   /* compression to file */
         {
-            size_t l = strlen(inFileName);
+            size_t l = strlen(filenameTable[0]);
             dynNameSpace = (char*)calloc(1,l+5);
             if (dynNameSpace==NULL) { DISPLAY("not enough memory\n"); exit(1); }
-            strcpy(dynNameSpace, inFileName);
+            strcpy(dynNameSpace, filenameTable[0]);
             strcpy(dynNameSpace+l, ZSTD_EXTENSION);
             outFileName = dynNameSpace;
             DISPLAYLEVEL(2, "Compressed filename will be : %s \n", outFileName);
@@ -351,8 +374,8 @@ int main(int argCount, const char** argv)
         }
         /* decompression to file (automatic name will work only if input filename has correct format extension) */
         {
-            size_t filenameSize = strlen(inFileName);
+            size_t filenameSize = strlen(filenameTable[0]);
-            if (strcmp(inFileName + (filenameSize-4), extension))
+            if (strcmp(filenameTable[0] + (filenameSize-4), extension))
             {
                  DISPLAYLEVEL(1, "unknown suffix - cannot determine destination filename\n");
                  return badusage(programName);
@@ -360,7 +383,7 @@ int main(int argCount, const char** argv)
             dynNameSpace = (char*)calloc(1,filenameSize+1);
             if (dynNameSpace==NULL) { DISPLAY("not enough memory\n"); exit(1); }
             outFileName = dynNameSpace;
-            strcpy(dynNameSpace, inFileName);
+            strcpy(dynNameSpace, filenameTable[0]);
             dynNameSpace[filenameSize-4]=0;
             DISPLAYLEVEL(2, "Decoding file %s \n", outFileName);
         }
@@ -369,18 +392,36 @@ int main(int argCount, const char** argv)
     /* Check if output is defined as console; trigger an error in this case */
     if (!strcmp(outFileName,stdoutmark) && IS_CONSOLE(stdout) && !forceStdout) return badusage(programName);
 
-    /* No warning message in pure pipe mode (stdin + stdout) */
+    /* No warning message in pure pipe mode (stdin + stdout) or multiple mode */
-    if (!strcmp(inFileName, stdinmark) && !strcmp(outFileName,stdoutmark) && (displayLevel==2)) displayLevel=1;
+    if (!strcmp(filenameTable[0], stdinmark) && !strcmp(outFileName,stdoutmark) && (displayLevel==2)) displayLevel=1;
+    if (multiple && (displayLevel==2)) displayLevel=1;
+
+    if ((!multiple) && (filenameIdx>2))
+    {
+        DISPLAY("Too many files on the command line (%u > 2). Do you mean -m ? \n", filenameIdx);
+        return filenameIdx;
+    }
 
     /* IO Stream/File */
     FIO_setNotificationLevel(displayLevel);
     if (decode)
-        FIO_decompressFilename(outFileName, inFileName);
+    {
+      if (multiple)
+        operationResult = FIO_decompressMultipleFilenames(filenameTable, filenameIdx, ZSTD_EXTENSION, dictFileName);
+      else
+        operationResult = FIO_decompressFilename(outFileName, filenameTable[0], dictFileName);
+    }
     else
-        FIO_compressFilename(outFileName, inFileName, cLevel);
+    {
+        if (multiple)
+          operationResult = FIO_compressMultipleFilenames(filenameTable, filenameIdx, ZSTD_EXTENSION, dictFileName, cLevel);
+        else
+          operationResult = FIO_compressFilename(outFileName, filenameTable[0], dictFileName, cLevel);
+    }
 
 _end:
     if (main_pause) waitEnter();
     free(dynNameSpace);
-    return 0;
+    free((void*)filenameTable);
+    return operationResult;
 }

visual/2013/fullbench/fullbench.vcxproj

@@ -27,26 +27,26 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -111,7 +111,7 @@
       <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <TreatWarningAsError>true</TreatWarningAsError>
       <EnablePREfast>true</EnablePREfast>
-      <AdditionalOptions>/analyze:stacksize19000 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/analyze:stacksize25000 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -129,7 +129,7 @@
       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnablePREfast>true</EnablePREfast>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/analyze:stacksize19000 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/analyze:stacksize25000 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -149,7 +149,7 @@
       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <TreatWarningAsError>true</TreatWarningAsError>
       <EnablePREfast>true</EnablePREfast>
-      <AdditionalOptions>/analyze:stacksize19000 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/analyze:stacksize25000 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>

visual/2013/fuzzer/fuzzer.vcxproj

@@ -27,26 +27,26 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -111,7 +111,7 @@
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       <TreatWarningAsError>true</TreatWarningAsError>
       <EnablePREfast>true</EnablePREfast>
-      <AdditionalOptions>/analyze:stacksize19000 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/analyze:stacksize25000 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
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@@ -129,7 +129,7 @@
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       <EnablePREfast>true</EnablePREfast>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/analyze:stacksize19000 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/analyze:stacksize25000 %(AdditionalOptions)</AdditionalOptions>
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     <Link>
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@@ -149,7 +149,7 @@
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       <TreatWarningAsError>true</TreatWarningAsError>
       <EnablePREfast>true</EnablePREfast>
-      <AdditionalOptions>/analyze:stacksize19000 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/analyze:stacksize25000 %(AdditionalOptions)</AdditionalOptions>
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     <Link>
       <SubSystem>Console</SubSystem>

visual/2013/zstd.sln

@@ -1,12 +1,16 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Express 2012 for Windows Desktop
+# Visual Studio 14
+VisualStudioVersion = 14.0.24720.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zstd", "zstd\zstd.vcxproj", "{4E52A41A-F33B-4C7A-8C36-A1A6B4F4277C}"
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fuzzer", "fuzzer\fuzzer.vcxproj", "{6FD4352B-346C-4703-96EA-D4A8B9A6976E}"
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "fullbench", "fullbench\fullbench.vcxproj", "{61ABD629-1CC8-4FD7-9281-6B8DBB9D3DF8}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "zstdlib", "zstdlib\zstdlib.vcxproj", "{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -39,6 +43,14 @@ Global
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 		{61ABD629-1CC8-4FD7-9281-6B8DBB9D3DF8}.Release|x64.Build.0 = Release|x64
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Debug|Win32.ActiveCfg = Debug|Win32
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Debug|Win32.Build.0 = Debug|Win32
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Debug|x64.ActiveCfg = Debug|x64
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Debug|x64.Build.0 = Debug|x64
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Release|Win32.ActiveCfg = Release|Win32
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Release|Win32.Build.0 = Release|Win32
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Release|x64.ActiveCfg = Release|x64
+		{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
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visual/2013/zstd/zstd.vcxproj

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     <ClCompile Include="..\..\..\lib\zstd_compress.c" />
     <ClCompile Include="..\..\..\lib\zstd_decompress.c" />
     <ClCompile Include="..\..\..\programs\bench.c" />
+    <ClCompile Include="..\..\..\programs\datagen.c" />
     <ClCompile Include="..\..\..\programs\fileio.c" />
     <ClCompile Include="..\..\..\programs\legacy\fileio_legacy.c" />
     <ClCompile Include="..\..\..\programs\xxhash.c" />
@@ -48,6 +49,7 @@
     <ClInclude Include="..\..\..\lib\zstd_internal.h" />
     <ClInclude Include="..\..\..\lib\zstd_static.h" />
     <ClInclude Include="..\..\..\programs\bench.h" />
+    <ClInclude Include="..\..\..\programs\datagen.h" />
     <ClInclude Include="..\..\..\programs\fileio.h" />
     <ClInclude Include="..\..\..\programs\legacy\fileio_legacy.h" />
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     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
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     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v120</PlatformToolset>
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     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v120</PlatformToolset>
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@@ -102,7 +104,7 @@
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+    <IncludePath>$(SolutionDir)..\..\programs\legacy;$(SolutionDir)..\..\lib\legacy;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
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visual/2013/zstd/zstd.vcxproj.filters

@@ -54,6 +54,9 @@
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   </ItemGroup>
   <ItemGroup>
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 </Project>

visual/2013/zstdlib/zstdlib.vcxproj

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visual/2013/zstdlib/zstdlib.vcxproj.filters

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