Merge pull request #96 from Cyan4973/dev

v0.4.4

.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

@@ -19,6 +19,7 @@ env:
   - 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 := 0.4.2
+export VERSION := 0.4.4
 
 PRGDIR  = programs
 ZSTDDIR = lib
@@ -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

@@ -1,3 +1,12 @@
+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)

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  2    /* for tweaks, bug-fixes, or development */
+#define ZSTD_VERSION_RELEASE  3    /* 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;
 
 
@@ -488,7 +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 */
@@ -599,7 +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
@@ -612,7 +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
@@ -730,13 +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;
@@ -752,12 +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 */
@@ -1008,7 +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;
@@ -1016,13 +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))
     {
@@ -1085,7 +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))
     {
@@ -1195,7 +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;
@@ -1209,7 +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))
     {
@@ -1300,7 +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))
     {
@@ -1518,6 +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;
@@ -1530,7 +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)
@@ -1555,7 +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;
@@ -1616,7 +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;
         }
@@ -1707,7 +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)
@@ -1975,28 +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 */
@@ -2011,8 +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,
@@ -2039,7 +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) + ((srcSizeHint-1) <= 16 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];

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 */
@@ -527,24 +527,21 @@ 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) */
-
-    if (match < base)
     {
         /* offset beyond prefix */
-        if (match < vBase) return ERROR(corruption_detected);
+        if (sequence.offset > (size_t)(oLitEnd - vBase))
+            return ERROR(corruption_detected);
         match = dictEnd - (base-match);
         if (match + sequence.matchLength <= dictEnd)
         {
-            memcpy(oLitEnd, match, sequence.matchLength);
+            memmove(oLitEnd, match, sequence.matchLength);
             return sequenceLength;
         }
         /* span extDict & currentPrefixSegment */
         {
             size_t length1 = dictEnd - match;
-            memcpy(oLitEnd, match, length1);
+            memmove(oLitEnd, match, length1);
             op = oLitEnd + length1;
             sequence.matchLength -= length1;
             match = base;
@@ -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,
@@ -691,7 +688,7 @@ size_t ZSTD_decompressDCtx(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const v
 
 
     /* init */
-    ctx->base = ctx->vBase = ctx->dictEnd = dst;
+    ctx->vBase = ctx->base = ctx->dictEnd = dst;
 
     /* Frame Header */
     {
@@ -773,10 +770,8 @@ 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;
     }
@@ -827,10 +822,9 @@ 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;
@@ -862,3 +856,10 @@ 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

@@ -85,27 +85,29 @@ typedef struct
 /** 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_advanced
 *   Same as ZSTD_compressCCtx(), 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);
+                                           ZSTD_parameters params);
 
 
 /* **************************************
 *  Streaming functions (bufferless 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
@@ -118,6 +120,10 @@ 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.
@@ -130,13 +136,16 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t maxDstSize);
 
 
 typedef struct ZSTD_DCtx_s ZSTD_DCtx;
-ZSTD_DCtx* ZSTD_createDCtx(void);
+ZSTDLIB_API ZSTD_DCtx* ZSTD_createDCtx(void);
-size_t     ZSTD_resetDCtx(ZSTD_DCtx* dctx);
+ZSTDLIB_API size_t     ZSTD_freeDCtx(ZSTD_DCtx* dctx);
-size_t     ZSTD_freeDCtx(ZSTD_DCtx* dctx);
+
+ZSTDLIB_API size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx);
+ZSTDLIB_API size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize);
+ZSTDLIB_API void   ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
+
+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 +155,17 @@ 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.
 
@@ -169,7 +180,8 @@ 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[3][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 */
     { 0, 18, 12, 12,  1,  4, ZSTD_fast    },  /* level  0 - never used */
@@ -194,6 +206,30 @@ static const ZSTD_parameters ZSTD_defaultParameters[3][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,  0,  0,  0,  0,  0, ZSTD_fast    },  /* level  0 - never used */
+    {  0, 18, 16, 15,  1,  7, ZSTD_fast    },  /* level  1 */
+    {  0, 18, 16, 16,  1,  7, ZSTD_fast    },  /* level  2 */
+    {  0, 18, 18, 18,  1,  7, ZSTD_fast    },  /* level  3 */
+    {  0, 18, 14, 15,  4,  6, ZSTD_greedy  },  /* level  4 */
+    {  0, 18, 16, 16,  1,  6, ZSTD_lazy    },  /* level  5 */
+    {  0, 18, 15, 15,  3,  6, ZSTD_lazy    },  /* level  6 */
+    {  0, 18, 15, 15,  4,  6, ZSTD_lazy    },  /* level  7 */
+    {  0, 18, 16, 18,  4,  6, ZSTD_lazy    },  /* level  8 */
+    {  0, 18, 18, 18,  4,  6, ZSTD_lazy    },  /* level  9 */
+    {  0, 18, 18, 18,  5,  6, ZSTD_lazy    },  /* level 10 */
+    {  0, 18, 18, 19,  6,  6, ZSTD_lazy    },  /* level 11 */
+    {  0, 18, 18, 19,  7,  6, ZSTD_lazy    },  /* level 12 */
+    {  0, 18, 19, 15,  7,  5, ZSTD_btlazy2 },  /* level 13 */
+    {  0, 18, 19, 16,  8,  5, ZSTD_btlazy2 },  /* level 14 */
+    {  0, 18, 19, 17,  9,  5, ZSTD_btlazy2 },  /* level 15 */
+    {  0, 18, 19, 17, 10,  5, ZSTD_btlazy2 },  /* level 16 */
+    {  0, 18, 19, 17, 11,  5, ZSTD_btlazy2 },  /* level 17 */
+    {  0, 18, 19, 17, 12,  5, ZSTD_btlazy2 },  /* level 18 */
+    {  0, 18, 19, 17, 13,  5, ZSTD_btlazy2 },  /* level 19 */
+    {  0, 18, 19, 17, 14,  5, ZSTD_btlazy2 },  /* level 20 */
+},
 {   /* for srcSize <= 128 KB */
     /*    W,  C,  H,  S,  L, strat */
     { 0, 17, 12, 12,  1,  4, ZSTD_fast    },  /* level  0 - never used */

programs/Makefile

@@ -30,7 +30,7 @@
 # fullbench32: Same as fullbench, but forced to compile in 32-bits mode
 # ##########################################################################
 
-VERSION?= 0.4.2
+VERSION?= 0.4.4
 
 DESTDIR?=
 PREFIX ?= /usr/local
@@ -65,6 +65,7 @@ VOID = /dev/null
 endif
 
 ZBUFFTEST = -T2mn
+FUZZERTEST= -T5mn
 
 .PHONY: default all clean install uninstall test test32 test-all
 
@@ -89,6 +90,13 @@ zstd-pgo : clean zstd
 	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)
@@ -161,77 +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
@@ -251,10 +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)
@@ -273,7 +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/fileio.c

@@ -121,6 +121,7 @@
 
 #define CACHELINE 64
 
+#define MAX_DICT_SIZE (512 KB)
 
 /* *************************************
 *  Macros
@@ -235,12 +236,13 @@ static U64 FIO_getFileSize(const char* infilename)
 }
 
 
-unsigned long long FIO_compressFilename(const char* output_filename, const char* input_filename, int cLevel)
+unsigned long long FIO_compressFilename(const char* output_filename, const char* input_filename,
+                                        const char* dictFileName, int cLevel)
 {
     U64 filesize = 0;
     U64 compressedfilesize = 0;
-    BYTE* inBuff;
+    U64 dictSize = 0;
-    BYTE* outBuff;
+    BYTE* inBuff, *outBuff, *dictBuff=NULL;
     size_t inBuffSize = ZBUFF_recommendedCInSize();
     size_t outBuffSize = ZBUFF_recommendedCOutSize();
     FILE* finput;
@@ -252,16 +254,43 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
     ctx = ZBUFF_createCCtx();
     inBuff  = (BYTE*)malloc(inBuffSize);
     outBuff = (BYTE*)malloc(outBuffSize);
-    if (!inBuff || !outBuff || !ctx) EXM_THROW(21, "Allocation error : not enough memory");
+    if (!inBuff || !outBuff || !ctx) EXM_THROW(20, "Allocation error : not enough memory");
+
+    /* dictionary */
+    if (dictFileName)
+    {
+        FILE* dictHandle;
+        size_t readSize;
+        DISPLAYLEVEL(4,"Using %s as dictionary \n", dictFileName);
+        dictHandle = fopen(dictFileName, "rb");
+        if (dictHandle==0) EXM_THROW(21, "Error opening dictionary file %s", dictFileName);
+        dictSize = FIO_getFileSize(dictFileName);
+        if (dictSize > MAX_DICT_SIZE)
+        {
+            int seekResult;
+            if (dictSize > 1 GB) EXM_THROW(21, "Dictionary file %s is too large", dictFileName);   /* avoid extreme cases */
+            DISPLAYLEVEL(2,"Dictionary %s is too large : using last %u bytes only \n", dictFileName, MAX_DICT_SIZE);
+            seekResult = fseek(dictHandle, (size_t)(dictSize-MAX_DICT_SIZE), SEEK_SET);   /* use end of file */
+            if (seekResult != 0) EXM_THROW(21, "Error seeking into dictionary file %s", dictFileName);
+            dictSize = MAX_DICT_SIZE;
+        }
+        dictBuff = (BYTE*)malloc((size_t)dictSize);
+        if (dictBuff==NULL) EXM_THROW(20, "Allocation error : not enough memory for dictBuff");
+        readSize = fread(dictBuff, 1, (size_t)dictSize, dictHandle);
+        if (readSize!=dictSize) EXM_THROW(21, "Error reading dictionary file %s", dictFileName);
+        fclose(dictHandle);
+    }
 
     /* init */
     FIO_getFileHandles(&finput, &foutput, input_filename, output_filename);
-    filesize = FIO_getFileSize(input_filename);
+    filesize = FIO_getFileSize(input_filename) + dictSize;
     errorCode = ZBUFF_compressInit_advanced(ctx, ZSTD_getParams(cLevel, filesize));
     if (ZBUFF_isError(errorCode)) EXM_THROW(22, "Error initializing compression");
-    filesize = 0;
+    errorCode = ZBUFF_compressWithDictionary(ctx, dictBuff, (size_t)dictSize);
+    if (ZBUFF_isError(errorCode)) EXM_THROW(22, "Error initializing dictionary");
 
     /* Main compression loop */
+    filesize = 0;
     while (1)
     {
         size_t inSize;
@@ -311,6 +340,7 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
     /* clean */
     free(inBuff);
     free(outBuff);
+    free(dictBuff);
     ZBUFF_freeCCtx(ctx);
     fclose(finput);
     if (fclose(foutput)) EXM_THROW(28, "Write error : cannot properly close %s", output_filename);
@@ -322,6 +352,7 @@ unsigned long long FIO_compressFilename(const char* output_filename, const char*
 unsigned long long FIO_decompressFrame(FILE* foutput, FILE* finput,
                                        BYTE* inBuff, size_t inBuffSize, size_t alreadyLoaded,
                                        BYTE* outBuff, size_t outBuffSize,
+                                       BYTE* dictBuff, size_t dictSize,
                                        ZBUFF_DCtx* dctx)
 {
     U64    frameSize = 0;
@@ -329,6 +360,7 @@ unsigned long long FIO_decompressFrame(FILE* foutput, FILE* finput,
 
     /* Main decompression Loop */
     ZBUFF_decompressInit(dctx);
+    ZBUFF_decompressWithDictionary(dctx, dictBuff, dictSize);
     while (1)
     {
         /* Decode */
@@ -359,16 +391,42 @@ unsigned long long FIO_decompressFrame(FILE* foutput, FILE* finput,
 }
 
 
-unsigned long long FIO_decompressFilename(const char* output_filename, const char* input_filename)
+unsigned long long FIO_decompressFilename(const char* output_filename, const char* input_filename, const char* dictFileName)
 {
     FILE* finput, *foutput;
     BYTE* inBuff=NULL;
     size_t inBuffSize = ZBUFF_recommendedDInSize();
     BYTE* outBuff=NULL;
     size_t outBuffSize = ZBUFF_recommendedDOutSize();
+    BYTE* dictBuff=NULL;
+    size_t dictSize = 0;
     U64   filesize = 0;
     size_t toRead;
 
+    /* dictionary */
+    if (dictFileName)
+    {
+        FILE* dictHandle;
+        size_t readSize;
+        DISPLAYLEVEL(4,"Using %s as dictionary \n", dictFileName);
+        dictHandle = fopen(dictFileName, "rb");
+        if (dictHandle==0) EXM_THROW(21, "Error opening dictionary file %s", dictFileName);
+        dictSize = (size_t)FIO_getFileSize(dictFileName);
+        if (dictSize > MAX_DICT_SIZE)
+        {
+            int seekResult;
+            if (dictSize > 1 GB) EXM_THROW(21, "Dictionary file %s is too large", dictFileName);   /* avoid extreme cases */
+            DISPLAYLEVEL(2,"Dictionary %s is too large : using last %u bytes only \n", dictFileName, MAX_DICT_SIZE);
+            seekResult = fseek(dictHandle, dictSize-MAX_DICT_SIZE, SEEK_SET);   /* use end of file */
+            if (seekResult != 0) EXM_THROW(21, "Error seeking into dictionary file %s", dictFileName);
+            dictSize = MAX_DICT_SIZE;
+        }
+        dictBuff = (BYTE*)malloc(dictSize);
+        if (dictBuff==NULL) EXM_THROW(20, "Allocation error : not enough memory for dictBuff");
+        readSize = fread(dictBuff, 1, (size_t)dictSize, dictHandle);
+        if (readSize!=dictSize) EXM_THROW(21, "Error reading dictionary file %s", dictFileName);
+        fclose(dictHandle);
+    }
 
     /* Init */
     ZBUFF_DCtx* dctx = ZBUFF_createDCtx();
@@ -396,7 +454,11 @@ unsigned long long FIO_decompressFilename(const char* output_filename, const cha
         }
 #endif   /* ZSTD_LEGACY_SUPPORT */
 
-        filesize += FIO_decompressFrame(foutput, finput, inBuff, inBuffSize, toRead, outBuff, outBuffSize, dctx);
+        filesize += FIO_decompressFrame(foutput, finput,
+                                        inBuff, inBuffSize, toRead,
+                                        outBuff, outBuffSize,
+                                        dictBuff, dictSize,
+                                        dctx);
     }
 
     DISPLAYLEVEL(2, "\r%79s\r", "");
@@ -405,6 +467,7 @@ unsigned long long FIO_decompressFilename(const char* output_filename, const cha
     /* clean */
     free(inBuff);
     free(outBuff);
+    free(dictBuff);
     ZBUFF_freeDCtx(dctx);
     fclose(finput);
     if (fclose(foutput)) EXM_THROW(38, "Write error : cannot properly close %s", output_filename);

programs/fileio.h

@@ -52,8 +52,8 @@ void FIO_setNotificationLevel(unsigned level);
 /* *************************************
 *  Stream/File functions
 ***************************************/
-unsigned long long FIO_compressFilename (const char* outfilename, const char* infilename, int compressionLevel);
+unsigned long long FIO_compressFilename (const char* outfilename, const char* infilename, const char* dictFileName, int compressionLevel);
-unsigned long long FIO_decompressFilename (const char* outfilename, const char* infilename);
+unsigned long long FIO_decompressFilename (const char* outfilename, const char* infilename, const char* dictFileName);
 /**
 FIO_compressFilename :
     @result : size of compressed file

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/playTests.sh

@@ -0,0 +1,88 @@
+#!/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 foo | $ZSTD > /dev/full && die "write error not detected!"
+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 "**** 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/zstdcli.c

@@ -70,7 +70,7 @@
 **************************************/
 #define COMPRESSOR_NAME "zstd command line interface"
 #ifndef ZSTD_VERSION
-#  define ZSTD_VERSION "v0.4.2"
+#  define ZSTD_VERSION "v0.4.4"
 #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 +118,7 @@ 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");
@@ -137,12 +136,15 @@ static int usage_advanced(const char* programName)
     DISPLAY( " -v     : verbose mode\n");
     DISPLAY( " -q     : suppress warnings; specify twice to suppress errors too\n");
     DISPLAY( " -c     : force write to standard output, even if it is the console\n");
+    DISPLAY( " -D file: use file content as Dictionary \n");
     //DISPLAY( " -t     : test compressed file integrity\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;
 }
 
@@ -170,16 +172,20 @@ int main(int argCount, const char** argv)
         decode=0,
         forceStdout=0,
         main_pause=0,
-        rangeBench = 1;
+        nextEntryIsDictionary=0;
-    unsigned fileNameStart = 0;
-    unsigned nbFiles = 0;
     unsigned cLevel = 1;
     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;
+    unsigned fileNameStart = 0;
+    unsigned nbFiles = 0;
+    int rangeBench = 1;
 
+    /* init */
+    (void)rangeBench; (void)nbFiles; (void)fileNameStart;   /* not used when ZSTD_NOBENCH set */
     displayOut = stderr;
     /* Pick out basename component. Don't rely on stdlib because of conflicting behavior. */
     for (i = (int)strlen(programName); i > 0; i--) { if (programName[i] == '/') { i++; break; } }
@@ -245,8 +251,11 @@ int main(int argCount, const char** argv)
                     /* 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;
@@ -257,9 +266,10 @@ 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;
 
@@ -293,6 +303,7 @@ 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;
@@ -304,6 +315,14 @@ int main(int argCount, const char** argv)
             continue;
         }
 
+        /* dictionary */
+        if (nextEntryIsDictionary)
+        {
+            nextEntryIsDictionary = 0;
+            dictFileName = argument;
+            continue;
+        }
+
         /* first provided filename is input */
         if (!inFileName) { inFileName = argument; fileNameStart = i; nbFiles = argCount-i; continue; }
 
@@ -320,7 +339,13 @@ int main(int argCount, const char** argv)
     DISPLAYLEVEL(3, WELCOME_MESSAGE);
 
     /* Check if benchmark is selected */
-    if (bench) { BMK_benchFiles(argv+fileNameStart, nbFiles, cLevel*rangeBench); goto _end; }
+    if (bench)
+    {
+#ifndef ZSTD_NOBENCH
+        BMK_benchFiles(argv+fileNameStart, nbFiles, cLevel*rangeBench);
+#endif
+        goto _end;
+    }
 
     /* No input filename ==> use stdin */
     if(!inFileName) { inFileName=stdinmark; }
@@ -369,9 +394,9 @@ int main(int argCount, const char** argv)
     /* IO Stream/File */
     FIO_setNotificationLevel(displayLevel);
     if (decode)
-        FIO_decompressFilename(outFileName, inFileName);
+        FIO_decompressFilename(outFileName, inFileName, dictFileName);
     else
-        FIO_compressFilename(outFileName, inFileName, cLevel);
+        FIO_compressFilename(outFileName, inFileName, dictFileName, cLevel);
 
 _end:
     if (main_pause) waitEnter();

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 @@
       <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/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
 		{61ABD629-1CC8-4FD7-9281-6B8DBB9D3DF8}.Release|Win32.Build.0 = Release|Win32
 		{61ABD629-1CC8-4FD7-9281-6B8DBB9D3DF8}.Release|x64.ActiveCfg = Release|x64
 		{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
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

visual/2013/zstd/zstd.vcxproj

@@ -63,27 +63,27 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
   </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>
     <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v110</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
@@ -104,7 +104,7 @@
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <LinkIncremental>true</LinkIncremental>
-    <IncludePath>$(SolutionDir)..\..\programs\legacy;$(SolutionDir)..\..\lib;$(SolutionDir)..\..\lib\legacy;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+    <IncludePath>$(SolutionDir)..\..\programs\legacy;$(SolutionDir)..\..\lib\legacy;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
     <RunCodeAnalysis>true</RunCodeAnalysis>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">

visual/2013/zstdlib/zstdlib.vcxproj

@@ -0,0 +1,216 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\..\lib\fse.c" />
+    <ClCompile Include="..\..\..\lib\huff0.c" />
+    <ClCompile Include="..\..\..\lib\zstd_buffered.c" />
+    <ClCompile Include="..\..\..\lib\zstd_compress.c" />
+    <ClCompile Include="..\..\..\lib\zstd_decompress.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\..\lib\bitstream.h" />
+    <ClInclude Include="..\..\..\lib\error.h" />
+    <ClInclude Include="..\..\..\lib\fse.h" />
+    <ClInclude Include="..\..\..\lib\fse_static.h" />
+    <ClInclude Include="..\..\..\lib\huff0.h" />
+    <ClInclude Include="..\..\..\lib\huff0_static.h" />
+    <ClInclude Include="..\..\..\lib\mem.h" />
+    <ClInclude Include="..\..\..\lib\zstd.h" />
+    <ClInclude Include="..\..\..\lib\zstd_buffered.h" />
+    <ClInclude Include="..\..\..\lib\zstd_buffered_static.h" />
+    <ClInclude Include="..\..\..\lib\zstd_internal.h" />
+    <ClInclude Include="..\..\..\lib\zstd_static.h" />
+    <ClInclude Include="resource.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="zstdlib.rc" />
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{8BFD8150-94D5-4BF9-8A50-7BD9929A0850}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>zstdlib</RootNamespace>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <CharacterSet>Unicode</CharacterSet>
+    <PlatformToolset>v120</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v120</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v120</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <PlatformToolset>v120</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <TargetName>zstdlib_x86</TargetName>
+    <IntDir>$(Platform)\$(Configuration)\</IntDir>
+    <OutDir>$(SolutionDir)$(Platform)\$(Configuration)\</OutDir>
+    <IncludePath>$(SolutionDir)..\..\programs\legacy;$(SolutionDir)..\..\lib\legacy;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+    <RunCodeAnalysis>true</RunCodeAnalysis>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <TargetName>zstdlib_x64</TargetName>
+    <IntDir>$(Platform)\$(Configuration)\</IntDir>
+    <OutDir>$(SolutionDir)$(Platform)\$(Configuration)\</OutDir>
+    <IncludePath>$(SolutionDir)..\..\programs\legacy;$(SolutionDir)..\..\lib\legacy;$(SolutionDir)..\..\lib;$(VCInstallDir)include;$(VCInstallDir)atlmfc\include;$(WindowsSDK_IncludePath);</IncludePath>
+    <RunCodeAnalysis>true</RunCodeAnalysis>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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