g++ compatibility

9 files changed, 37 insertions, 223 deletions

diff --git a/programs/bench.c b/programs/bench.c
index 77120f2..0ed7fcb 100644
--- a/programs/bench.c
+++ b/programs/bench.c
@@ -1,6 +1,7 @@
 /*
-    bench.c - Demo program to benchmark open-source compression algorithm
+    bench.c - Demo program to benchmark open-source compression algorithms
     Copyright (C) Yann Collet 2012-2015
+
     GPL v2 License
 
     This program is free software; you can redistribute it and/or modify
@@ -141,15 +142,15 @@ static int chunkSize = DEFAULT_CHUNKSIZE;
 static int nbIterations = NBLOOPS;
 static int BMK_pause = 0;
 
-void BMK_SetBlocksize(int bsize) { chunkSize = bsize; }
+void BMK_setBlocksize(int bsize) { chunkSize = bsize; }
 
-void BMK_SetNbIterations(int nbLoops)
+void BMK_setNbIterations(int nbLoops)
 {
     nbIterations = nbLoops;
     DISPLAY("- %i iterations -\n", nbIterations);
 }
 
-void BMK_SetPause(void) { BMK_pause = 1; }
+void BMK_setPause(void) { BMK_pause = 1; }
 
 
 /*********************************************************
@@ -234,7 +235,7 @@ static U64 BMK_GetFileSize(const char* infilename)
 *  Public function
 **********************************************************/
 
-int BMK_benchFile(const char** fileNamesTable, int nbFiles, int cLevel)
+int BMK_benchFiles(const char** fileNamesTable, int nbFiles, int cLevel)
 {
   int fileIdx=0;
   char* orig_buff;
diff --git a/programs/bench.h b/programs/bench.h
index 2a20cdb..3231727 100644
--- a/programs/bench.h
+++ b/programs/bench.h
@@ -22,21 +22,12 @@
 */
 #pragma once
 
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
 
 /* Main function */
-int BMK_benchFile(const char** fileNamesTable, int nbFiles, int cLevel);
+int BMK_benchFiles(const char** fileNamesTable, int nbFiles, int cLevel);
 
 /* Set Parameters */
-void BMK_SetBlocksize(int bsize);
-void BMK_SetNbIterations(int nbLoops);
-void BMK_SetPause(void);
-
-
+void BMK_setBlocksize(int bsize);
+void BMK_setNbIterations(int nbLoops);
+void BMK_setPause(void);
 
-#if defined (__cplusplus)
-}
-#endif
diff --git a/programs/datagen.c b/programs/datagen.c
index 2a10b81..743691e 100644
--- a/programs/datagen.c
+++ b/programs/datagen.c
@@ -90,7 +90,7 @@ static unsigned int RDG_rand(U32* src)
 #define LTMASK (LTSIZE-1)
 static void* RDG_createLiteralDistrib(double ld)
 {
-    BYTE* lt = malloc(LTSIZE);
+    BYTE* lt = (BYTE*)malloc(LTSIZE);
     U32 i = 0;
     BYTE character = '0';
     BYTE firstChar = '(';
@@ -117,7 +117,7 @@ static void* RDG_createLiteralDistrib(double ld)
 
 static char RDG_genChar(U32* seed, const void* ltctx)
 {
-    const BYTE* lt = ltctx;
+    const BYTE* lt = (const BYTE*)ltctx;
     U32 id = RDG_rand(seed) & LTMASK;
     return lt[id];
 }
diff --git a/programs/frametest.c b/programs/frametest.c
index a5a23c2..df37e5f 100644
--- a/programs/frametest.c
+++ b/programs/frametest.c
@@ -229,11 +229,12 @@ int basicTests(U32 seed, double compressibility)
     void* decodedBuffer;
     U32 randState = seed;
     size_t cSize, testSize;
-    LZ4F_preferences_t prefs = { 0 };
+    LZ4F_preferences_t prefs;
     LZ4F_decompressionContext_t dCtx;
     U64 crcOrig;
 
     // Create compressible test buffer
+    memset(&prefs, 0, sizeof(prefs));
     CNBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
     compressedBuffer = malloc(LZ4F_compressFrameBound(COMPRESSIBLE_NOISE_LENGTH, NULL));
     decodedBuffer = malloc(COMPRESSIBLE_NOISE_LENGTH);
@@ -441,7 +442,7 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
         unsigned BMId   = FUZ_rand(&randState) & 1;
         unsigned CCflag = FUZ_rand(&randState) & 1;
         unsigned autoflush = (FUZ_rand(&randState) & 7) == 2;
-        LZ4F_preferences_t prefs = { 0 };
+        LZ4F_preferences_t prefs;
         LZ4F_compressOptions_t cOptions = { 0 };
         LZ4F_decompressOptions_t dOptions = { 0 };
         unsigned nbBits = (FUZ_rand(&randState) % (FUZ_highbit(srcDataLength-1) - 1)) + 1;
@@ -452,6 +453,7 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
         LZ4F_preferences_t* prefsPtr = &prefs;
 
         (void)FUZ_rand(&coreRand);   // update rand seed
+        memset(&prefs, 0, sizeof(prefs));
         prefs.frameInfo.blockMode = (blockMode_t)BMId;
         prefs.frameInfo.blockSizeID = (blockSizeID_t)BSId;
         prefs.frameInfo.contentChecksumFlag = (contentChecksum_t)CCflag;
@@ -523,17 +525,14 @@ int fuzzerTests(U32 seed, unsigned nbTests, unsigned startTest, double compressi
                 if (oSize > (size_t)(oend-op)) oSize = oend-op;
                 dOptions.stableDst = FUZ_rand(&randState) & 1;
                 if (nonContiguousDst==2) dOptions.stableDst = 0;
-                //if (ip == compressedBuffer+62073)                    DISPLAY("oSize : %i : pos %i \n", (int)oSize, (int)(op-(BYTE*)decodedBuffer));
                 result = LZ4F_decompress(dCtx, op, &oSize, ip, &iSize, &dOptions);
-                //if (op+oSize >= (BYTE*)decodedBuffer+94727)                    DISPLAY("iSize : %i : pos %i \n", (int)iSize, (int)(ip-(BYTE*)compressedBuffer));
-                //if ((int)result<0)                    DISPLAY("iSize : %i : pos %i \n", (int)iSize, (int)(ip-(BYTE*)compressedBuffer));
                 if (result == (size_t)-ERROR_checksum_invalid) locateBuffDiff((BYTE*)srcBuffer+srcStart, decodedBuffer, srcSize, nonContiguousDst);
                 CHECK(LZ4F_isError(result), "Decompression failed (error %i:%s)", (int)result, LZ4F_getErrorName((LZ4F_errorCode_t)result));
                 XXH64_update(&xxh64, op, (U32)oSize);
                 op += oSize;
                 ip += iSize;
                 op += nonContiguousDst;
-                if (nonContiguousDst==2) op = decodedBuffer;   // overwritten destination
+                if (nonContiguousDst==2) op = (BYTE*)decodedBuffer;   /* overwritten destination */
             }
             CHECK(result != 0, "Frame decompression failed (error %i)", (int)result);
             crcDecoded = XXH64_digest(&xxh64);
diff --git a/programs/fullbench.c b/programs/fullbench.c
index 756357a..6ae28d7 100755..100644
--- a/programs/fullbench.c
+++ b/programs/fullbench.c
@@ -687,7 +687,7 @@ int fullSpeedBench(char** fileNamesTable, int nbFiles)
                 milliTime = BMK_GetMilliStart();
                 while(BMK_GetMilliSpan(milliTime) < TIMELOOP)
                 {
-                    if (initFunction!=NULL) ctx = initFunction(chunkP[0].origBuffer);
+                    if (initFunction!=NULL) ctx = (LZ4_stream_t*)initFunction(chunkP[0].origBuffer);
                     for (chunkNb=0; chunkNb<nbChunks; chunkNb++)
                     {
                         chunkP[chunkNb].compressedSize = compressionFunction(chunkP[chunkNb].origBuffer, chunkP[chunkNb].compressedBuffer, chunkP[chunkNb].origSize);
diff --git a/programs/fuzzer.c b/programs/fuzzer.c
index f9467d9..ee2beb8 100644
--- a/programs/fuzzer.c
+++ b/programs/fuzzer.c
@@ -323,6 +323,7 @@ static int FUZ_test(U32 seed, const U32 nbCycles, const U32 startCycle, const do
     U32 crcOrig, crcCheck;
     U32 coreRandState = seed;
     U32 randState = coreRandState ^ PRIME3;
+    int result = 0;
 
 
     // init
@@ -688,7 +689,6 @@ static int FUZ_test(U32 seed, const U32 nbCycles, const U32 startCycle, const do
 
     // unalloc
     {
-        int result = 0;
 _exit:
         free(CNBuffer);
         free(compressedBuffer);
diff --git a/programs/lz4cli.c b/programs/lz4cli.c
index 0a4d71d..10b980f 100644
--- a/programs/lz4cli.c
+++ b/programs/lz4cli.c
@@ -83,11 +83,6 @@
 /*****************************
 *  Constants
 ******************************/
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-#  undef LZ4_VERSION
-#  define LZ4_VERSION "EXPERIMENTAL_SPARSE_FILE"
-#endif
-
 #define COMPRESSOR_NAME "LZ4 command line interface"
 #ifndef LZ4_VERSION
 #  define LZ4_VERSION "r128"
@@ -192,10 +187,6 @@ static int usage_advanced(void)
     DISPLAY( " -y     : overwrite output without prompting \n");
     DISPLAY( " -s     : suppress warnings \n");
 #endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-    DISPLAY( "Experimental : Sparse file\n");
-    DISPLAY( " -x     : enable sparse file\n");
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
     EXTENDED_HELP;
     return 0;
 }
@@ -288,9 +279,6 @@ int main(int argc, char** argv)
     /* Init */
     programName = argv[0];
     LZ4IO_setOverwrite(0);
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-    LZ4IO_setSparseFile(0);
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
     blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT);
 
     /* lz4cat predefined behavior */
@@ -387,7 +375,7 @@ int main(int argc, char** argv)
                         {
                             int B = argument[1] - '0';
                             blockSize = LZ4IO_setBlockSizeID(B);
-                            BMK_SetBlocksize(blockSize);
+                            BMK_setBlocksize(blockSize);
                             argument++;
                             break;
                         }
@@ -405,13 +393,13 @@ int main(int argc, char** argv)
                     /* Benchmark */
                 case 'b': bench=1; multiple_inputs=1;
                     if (inFileNames == NULL)
-                        inFileNames = malloc(argc * sizeof(char*));
+                        inFileNames = (const char**) malloc(argc * sizeof(char*));
                     break;
 
                     /* Treat non-option args as input files.  See https://code.google.com/p/lz4/issues/detail?id=151 */
                 case 'm': multiple_inputs=1;
                     if (inFileNames == NULL)
-                        inFileNames = malloc(argc * sizeof(char*));
+                        inFileNames = (const char**) malloc(argc * sizeof(char*));
                     break;
 
                     /* Modify Nb Iterations (benchmark only) */
@@ -419,18 +407,13 @@ int main(int argc, char** argv)
                     if ((argument[1] >='1') && (argument[1] <='9'))
                     {
                         int iters = argument[1] - '0';
-                        BMK_SetNbIterations(iters);
+                        BMK_setNbIterations(iters);
                         argument++;
                     }
                     break;
 
                     /* Pause at the end (hidden option) */
-                case 'p': main_pause=1; BMK_SetPause(); break;
-
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-                    /* Experimental : Enable sparse file */
-                case 'x': LZ4IO_setSparseFile(1); break;
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
+                case 'p': main_pause=1; BMK_setPause(); break;
 
                     /* Specific commands for customized versions */
                 EXTENDED_ARGUMENTS;
@@ -471,7 +454,7 @@ int main(int argc, char** argv)
     if (!strcmp(input_filename, stdinmark) && IS_CONSOLE(stdin) ) badusage();
 
     /* Check if benchmark is selected */
-    if (bench) return BMK_benchFile(inFileNames, ifnIdx, cLevel);
+    if (bench) return BMK_benchFiles(inFileNames, ifnIdx, cLevel);
 
     /* No output filename ==> try to select one automatically (when possible) */
     while (!output_filename)
diff --git a/programs/lz4io.c b/programs/lz4io.c
index 9d5bee5..fd98247 100644
--- a/programs/lz4io.c
+++ b/programs/lz4io.c
@@ -39,20 +39,15 @@
 #endif
 
 #define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#ifdef __GNUC__
-#  pragma GCC diagnostic ignored "-Wmissing-braces"   /* GCC bug 53119 : doesn't accept { 0 } as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */
-#  pragma GCC diagnostic ignored "-Wmissing-field-initializers"   /* GCC bug 53119 : doesn't accept { 0 } as initializer (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119) */
-#endif
 
 #define _LARGE_FILES           /* Large file support on 32-bits AIX */
 #define _FILE_OFFSET_BITS 64   /* Large file support on 32-bits unix */
-#define _POSIX_SOURCE 1        /* for fileno() within <stdio.h> on unix */
 
 
 /****************************
 *  Includes
 *****************************/
-#include <stdio.h>    /* fprintf, fopen, fread, _fileno, stdin, stdout */
+#include <stdio.h>    /* fprintf, fopen, fread, stdin, stdout */
 #include <stdlib.h>   /* malloc, free */
 #include <string.h>   /* strcmp, strlen */
 #include <time.h>     /* clock */
@@ -62,55 +57,18 @@
 #include "lz4frame.h"
 
 
-/**************************************
-   Basic Types
-**************************************/
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)   /* C99 */
-# include <stdint.h>
-  typedef  uint8_t BYTE;
-  typedef uint16_t U16;
-  typedef uint32_t U32;
-  typedef  int32_t S32;
-  typedef uint64_t U64;
-#else
-  typedef unsigned char       BYTE;
-  typedef unsigned short      U16;
-  typedef unsigned int        U32;
-  typedef   signed int        S32;
-  typedef unsigned long long  U64;
-#endif
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
-
-
 /****************************
 *  OS-specific Includes
 *****************************/
 #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) || defined(__CYGWIN__)
 #  include <fcntl.h>   /* _O_BINARY */
-#  include <io.h>      /* _setmode, _isatty */
-#  ifdef __MINGW32__
-   int _fileno(FILE *stream);   /* MINGW somehow forgets to include this windows declaration into <stdio.h> */
-#  endif
+#  include <io.h>      /* _setmode, _fileno */
+#  define SET_BINARY_MODE(file) _setmode(_fileno(file), _O_BINARY)
 #  if defined(_MSC_VER) && (_MSC_VER >= 1400)  /* Avoid MSVC fseek()'s 2GiB barrier */
 #    define fseek _fseeki64
 #  endif
-#  define SET_BINARY_MODE(file) _setmode(_fileno(file), _O_BINARY)
-#  define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
-#  if defined(LZ4IO_ENABLE_SPARSE_FILE)
-#    include <windows.h>
-#    define SET_SPARSE_FILE_MODE(file) do { DWORD dw; DeviceIoControl((HANDLE) _get_osfhandle(_fileno(file)), FSCTL_SET_SPARSE, 0, 0, 0, 0, &dw, 0); } while(0)
-#    if defined(_MSC_VER) && (_MSC_VER >= 1400)
-#      define fseek _fseeki64
-#    endif
-#  endif /* LZ4IO_ENABLE_SPARSE_FILE */
 #else
-#  include <unistd.h>  /* isatty */
 #  define SET_BINARY_MODE(file)
-#  define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
-#  if defined(LZ4IO_ENABLE_SPARSE_FILE)
-#    define SET_SPARSE_FILE_MODE(file)
-#  endif /* LZ4IO_ENABLE_SPARSE_FILE */
 #endif
 
 
@@ -164,9 +122,6 @@ static int globalBlockSizeId = LZ4S_BLOCKSIZEID_DEFAULT;
 static int blockChecksum = 0;
 static int streamChecksum = 1;
 static int blockIndependence = 1;
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-static int sparseFile = 0;
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
 
 static const int minBlockSizeID = 4;
 static const int maxBlockSizeID = 7;
@@ -193,7 +148,6 @@ static const int maxBlockSizeID = 7;
 #define EXTENDED_ARGUMENTS
 #define EXTENDED_HELP
 #define EXTENDED_FORMAT
-#define DEFAULT_COMPRESSOR   compress_file
 #define DEFAULT_DECOMPRESSOR decodeLZ4S
 
 
@@ -208,75 +162,6 @@ int LZ4IO_setOverwrite(int yes)
    return overwrite;
 }
 
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-/* Default setting : sparseFile = 0; (Disable)
-   return : sparse file mode (0:Disable / 1:Enable) */
-int LZ4IO_setSparseFile(int yes)
-{
-    sparseFile = yes;
-    return sparseFile;
-}
-
-static int isSparse(const void* p, size_t size)
-{
-#if 0
-    /* naive */
-    const char* p8 = p;
-    for(; size; --size)
-    {
-        if(*p8 != 0)
-        {
-            return 0;
-        }
-        ++p8;
-    }
-    return 1;
-#elif 0
-    /* xz method */
-    const U64* p64 = (const U64*) p;
-    const char* p8 = (const char*) p;
-    const size_t n = size / sizeof(*p64);
-    size_t i;
-
-    for (i = 0; i < n; ++i)
-    {
-        if (p64[i] != 0)
-        {
-            return 0;
-        }
-    }
-
-    for(i = n * sizeof(*p64); i < size; ++i)
-    {
-        if (p8[i] != 0)
-        {
-            return 0;
-        }
-    }
-
-    return 1;
-#elif 0
-    /* Neil's */
-    const char* buf = (const char*) p;
-    return buf[0] == 0 && !memcmp(buf, buf + 1, size - 1);
-#else
-    /* GNU Core Utilities : coreutils/src/system.h / is_nul() */
-    const U64* wp = (const U64*) p;
-    const char* cbuf = (const char*) p;
-    const char* cp;
-
-    // Find first nonzero *word*, or the word with the sentinel.
-    while(*wp++ == 0) ;
-
-    // Find the first nonzero *byte*, or the sentinel.
-    cp = (const char*) (wp - 1);
-    while(*cp++ == 0) ;
-
-    return cbuf + size < cp;
-#endif
-}
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
-
 /* blockSizeID : valid values : 4-5-6-7 */
 int LZ4IO_setBlockSizeID(int bsid)
 {
@@ -386,7 +271,7 @@ static int get_fileHandle(const char* input_filename, const char* output_filenam
 /* unoptimized version; solves endianess & alignment issues */
 static void LZ4IO_writeLE32 (void* p, unsigned value32)
 {
-    unsigned char* dstPtr = p;
+    unsigned char* dstPtr = (unsigned char*)p;
     dstPtr[0] = (unsigned char)value32;
     dstPtr[1] = (unsigned char)(value32 >> 8);
     dstPtr[2] = (unsigned char)(value32 >> 16);
@@ -483,11 +368,12 @@ int LZ4IO_compressFilename(const char* input_filename, const char* output_filena
     size_t sizeCheck, headerSize, readSize, outBuffSize;
     LZ4F_compressionContext_t ctx;
     LZ4F_errorCode_t errorCode;
-    LZ4F_preferences_t prefs = {0};
+    LZ4F_preferences_t prefs;
 
 
     /* Init */
     start = clock();
+    memset(&prefs, 0, sizeof(prefs));
     if ((displayLevel==2) && (compressionLevel>=3)) displayLevel=3;
     errorCode = LZ4F_createCompressionContext(&ctx, LZ4F_VERSION);
     if (LZ4F_isError(errorCode)) EXM_THROW(30, "Allocation error : can't create LZ4F context : %s", LZ4F_getErrorName(errorCode));
@@ -497,9 +383,9 @@ int LZ4IO_compressFilename(const char* input_filename, const char* output_filena
     /* Set compression parameters */
     prefs.autoFlush = 1;
     prefs.compressionLevel = compressionLevel;
-    prefs.frameInfo.blockMode = blockIndependence;
-    prefs.frameInfo.blockSizeID = globalBlockSizeId;
-    prefs.frameInfo.contentChecksumFlag = streamChecksum;
+    prefs.frameInfo.blockMode = (blockMode_t)blockIndependence;
+    prefs.frameInfo.blockSizeID = (blockSizeID_t)globalBlockSizeId;
+    prefs.frameInfo.contentChecksumFlag = (contentChecksum_t)streamChecksum;
 
     /* Allocate Memory */
     in_buff  = (char*)malloc(blockSize);
@@ -578,7 +464,7 @@ int LZ4IO_compressMultipleFilenames(const char** inFileNamesTable, int ifntSize,
     for (i=0; i<ifntSize; i++)
     {
         size_t ifnSize = strlen(inFileNamesTable[i]);
-        if (ofnSize <= ifnSize+suffixSize+1) { free(outFileName); ofnSize = ifnSize + 20; outFileName = malloc(ofnSize); }
+        if (ofnSize <= ifnSize+suffixSize+1) { free(outFileName); ofnSize = ifnSize + 20; outFileName = (char*)malloc(ofnSize); }
         strcpy(outFileName, inFileNamesTable[i]);
         strcat(outFileName, suffix);
         LZ4IO_compressFilename(inFileNamesTable[i], outFileName, compressionlevel);
@@ -595,7 +481,7 @@ int LZ4IO_compressMultipleFilenames(const char** inFileNamesTable, int ifntSize,
 
 static unsigned LZ4IO_readLE32 (const void* s)
 {
-    const unsigned char* srcPtr = s;
+    const unsigned char* srcPtr = (const unsigned char*)s;
     unsigned value32 = srcPtr[0];
     value32 += (srcPtr[1]<<8);
     value32 += (srcPtr[2]<<16);
@@ -663,9 +549,6 @@ static unsigned long long decodeLZ4S(FILE* finput, FILE* foutput)
     LZ4F_decompressionContext_t ctx;
     LZ4F_errorCode_t errorCode;
     LZ4F_frameInfo_t frameInfo;
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-    size_t sparsePending = 0;
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
 
     /* init */
     errorCode = LZ4F_createDecompressionContext(&ctx, LZ4F_VERSION);
@@ -687,12 +570,7 @@ static unsigned long long decodeLZ4S(FILE* finput, FILE* foutput)
     outBuffSize = LZ4IO_setBlockSizeID(frameInfo.blockSizeID);
     inBuffSize = outBuffSize + 4;
     inBuff = (char*)malloc(inBuffSize);
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-    outBuff = (char*)malloc(outBuffSize+sizeof(U64));
-    *(U64*) &outBuff[outBuffSize] = (U64) -1; /* sentinel */
-#else /* LZ4IO_ENABLE_SPARSE_FILE */
     outBuff = (char*)malloc(outBuffSize);
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
     if (!inBuff || !outBuff) EXM_THROW(65, "Allocation error : not enough memory");
 
     /* Main Loop */
@@ -712,35 +590,9 @@ static unsigned long long decodeLZ4S(FILE* finput, FILE* foutput)
         filesize += decodedBytes;
 
         /* Write Block */
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-        if(sparseFile)
-        {
-            if(isSparse(outBuff, decodedBytes))
-            {
-                sparsePending += decodedBytes;
-                continue;
-            }
-            if(sparsePending > 0)
-            {
-                fseek(foutput, sparsePending, SEEK_CUR);
-                sparsePending = 0;
-            }
-        }
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
         sizeCheck = fwrite(outBuff, 1, decodedBytes, foutput);
         if (sizeCheck != decodedBytes) EXM_THROW(68, "Write error : cannot write decoded block\n");
     }
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-    if(sparseFile)
-    {
-        if(sparsePending > 0)
-        {
-            fseek(foutput, sparsePending-1, SEEK_CUR);
-            fputc(0, foutput);
-            sparsePending = 0;
-        }
-    }
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
 
     /* Free */
     free(inBuff);
@@ -803,14 +655,6 @@ int LZ4IO_decompressFilename(const char* input_filename, const char* output_file
     start = clock();
     get_fileHandle(input_filename, output_filename, &finput, &foutput);
 
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-    if (sparseFile!=0 && foutput!=0)
-    {
-        DISPLAY("Experimental : Using sparse file\n");
-        SET_SPARSE_FILE_MODE(foutput);
-    }
-#endif /* LZ4IO_ENABLE_SPARSE_FILE */
-
     /* Loop over multiple streams */
     do
     {
diff --git a/programs/lz4io.h b/programs/lz4io.h
index 1c9b837..f99e8bb 100644
--- a/programs/lz4io.h
+++ b/programs/lz4io.h
@@ -29,6 +29,7 @@
   - The license of this source file is GPLv2.
 */
 
+#pragma once
 
 /* ************************************************** */
 /* Special input/output values                        */
@@ -77,8 +78,3 @@ int LZ4IO_setStreamChecksumMode(int xxhash);
 
 /* Default setting : 0 (no notification) */
 int LZ4IO_setNotificationLevel(int level);
-
-#if defined(LZ4IO_ENABLE_SPARSE_FILE)
-/* Default setting : 0 (sparseFile = 0; disable sparse file) */
-int LZ4IO_setSparseFile(int yes);
-#endif