Tons of code cleanup, refactor Network to use EthernetTapFactory, probably also fix GitHub issue #90

2 files changed, 0 insertions, 1065 deletions

diff --git a/ext/lz4/lz4hc.c b/ext/lz4/lz4hc.c
deleted file mode 100644
index 60867490..00000000
--- a/ext/lz4/lz4hc.c
+++ /dev/null
@@ -1,892 +0,0 @@
-/*
-   LZ4 HC - High Compression Mode of LZ4
-   Copyright (C) 2011-2014, Yann Collet.
-   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are
-   met:
-
-       * Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-       * Redistributions in binary form must reproduce the above
-   copyright notice, this list of conditions and the following disclaimer
-   in the documentation and/or other materials provided with the
-   distribution.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-   You can contact the author at :
-   - LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
-   - LZ4 source repository : http://code.google.com/p/lz4/
-*/
-
-
-
-/**************************************
-   Tuning Parameter
-**************************************/
-#define LZ4HC_DEFAULT_COMPRESSIONLEVEL 8
-
-
-/**************************************
-   Memory routines
-**************************************/
-#include <stdlib.h>   /* calloc, free */
-#define ALLOCATOR(s)  calloc(1,s)
-#define FREEMEM       free
-#include <string.h>   /* memset, memcpy */
-#define MEM_INIT      memset
-
-
-/**************************************
-   CPU Feature Detection
-**************************************/
-/* 32 or 64 bits ? */
-#if (defined(__x86_64__) || defined(_M_X64) || defined(_WIN64) \
-  || defined(__powerpc64__) || defined(__powerpc64le__) \
-  || defined(__ppc64__) || defined(__ppc64le__) \
-  || defined(__PPC64__) || defined(__PPC64LE__) \
-  || defined(__ia64) || defined(__itanium__) || defined(_M_IA64) )   /* Detects 64 bits mode */
-#  define LZ4_ARCH64 1
-#else
-#  define LZ4_ARCH64 0
-#endif
-
-/*
- * Little Endian or Big Endian ?
- * Overwrite the #define below if you know your architecture endianess
- */
-#include <stdlib.h>   /* Apparently required to detect endianess */
-#if defined (__GLIBC__)
-#  include <endian.h>
-#  if (__BYTE_ORDER == __BIG_ENDIAN)
-#     define LZ4_BIG_ENDIAN 1
-#  endif
-#elif (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(__LITTLE_ENDIAN__) || defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN))
-#  define LZ4_BIG_ENDIAN 1
-#elif defined(__sparc) || defined(__sparc__) \
-   || defined(__powerpc__) || defined(__ppc__) || defined(__PPC__) \
-   || defined(__hpux)  || defined(__hppa) \
-   || defined(_MIPSEB) || defined(__s390__)
-#  define LZ4_BIG_ENDIAN 1
-#else
-/* Little Endian assumed. PDP Endian and other very rare endian format are unsupported. */
-#endif
-
-/*
- * Unaligned memory access is automatically enabled for "common" CPU, such as x86.
- * For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected
- * If you know your target CPU supports unaligned memory access, you want to force this option manually to improve performance
- */
-#if defined(__ARM_FEATURE_UNALIGNED)
-#  define LZ4_FORCE_UNALIGNED_ACCESS 1
-#endif
-
-/* Define this parameter if your target system or compiler does not support hardware bit count */
-#if defined(_MSC_VER) && defined(_WIN32_WCE)            /* Visual Studio for Windows CE does not support Hardware bit count */
-#  define LZ4_FORCE_SW_BITCOUNT
-#endif
-
-
-/**************************************
- Compiler Options
-**************************************/
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)   /* C99 */
-/* "restrict" is a known keyword */
-#else
-#  define restrict /* Disable restrict */
-#endif
-
-#ifdef _MSC_VER    /* Visual Studio */
-#  define FORCE_INLINE static __forceinline
-#  include <intrin.h>                    /* For Visual 2005 */
-#  if LZ4_ARCH64   /* 64-bits */
-#    pragma intrinsic(_BitScanForward64) /* For Visual 2005 */
-#    pragma intrinsic(_BitScanReverse64) /* For Visual 2005 */
-#  else            /* 32-bits */
-#    pragma intrinsic(_BitScanForward)   /* For Visual 2005 */
-#    pragma intrinsic(_BitScanReverse)   /* For Visual 2005 */
-#  endif
-#  pragma warning(disable : 4127)        /* disable: C4127: conditional expression is constant */
-#  pragma warning(disable : 4701)        /* disable: C4701: potentially uninitialized local variable used */
-#else
-#  ifdef __GNUC__
-#    define FORCE_INLINE static inline __attribute__((always_inline))
-#  else
-#    define FORCE_INLINE static inline
-#  endif
-#endif
-
-#ifdef _MSC_VER  /* Visual Studio */
-#  define lz4_bswap16(x) _byteswap_ushort(x)
-#else
-#  define lz4_bswap16(x)  ((unsigned short int) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)))
-#endif
-
-
-/**************************************
-   Includes
-**************************************/
-#include "lz4hc.h"
-#include "lz4.h"
-
-
-/**************************************
-   Basic Types
-**************************************/
-#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
-
-#if defined(__GNUC__)  && !defined(LZ4_FORCE_UNALIGNED_ACCESS)
-#  define _PACKED __attribute__ ((packed))
-#else
-#  define _PACKED
-#endif
-
-#if !defined(LZ4_FORCE_UNALIGNED_ACCESS) && !defined(__GNUC__)
-#  ifdef __IBMC__
-#    pragma pack(1)
-#  else
-#    pragma pack(push, 1)
-#  endif
-#endif
-
-typedef struct _U16_S { U16 v; } _PACKED U16_S;
-typedef struct _U32_S { U32 v; } _PACKED U32_S;
-typedef struct _U64_S { U64 v; } _PACKED U64_S;
-
-#if !defined(LZ4_FORCE_UNALIGNED_ACCESS) && !defined(__GNUC__)
-#  pragma pack(pop)
-#endif
-
-#define A64(x) (((U64_S *)(x))->v)
-#define A32(x) (((U32_S *)(x))->v)
-#define A16(x) (((U16_S *)(x))->v)
-
-
-/**************************************
-   Constants
-**************************************/
-#define MINMATCH 4
-
-#define DICTIONARY_LOGSIZE 16
-#define MAXD (1<<DICTIONARY_LOGSIZE)
-#define MAXD_MASK ((U32)(MAXD - 1))
-#define MAX_DISTANCE (MAXD - 1)
-
-#define HASH_LOG (DICTIONARY_LOGSIZE-1)
-#define HASHTABLESIZE (1 << HASH_LOG)
-#define HASH_MASK (HASHTABLESIZE - 1)
-
-#define ML_BITS  4
-#define ML_MASK  (size_t)((1U<<ML_BITS)-1)
-#define RUN_BITS (8-ML_BITS)
-#define RUN_MASK ((1U<<RUN_BITS)-1)
-
-#define COPYLENGTH 8
-#define LASTLITERALS 5
-#define MFLIMIT (COPYLENGTH+MINMATCH)
-#define MINLENGTH (MFLIMIT+1)
-#define OPTIMAL_ML (int)((ML_MASK-1)+MINMATCH)
-
-#define KB *(1U<<10)
-#define MB *(1U<<20)
-#define GB *(1U<<30)
-
-
-/**************************************
-   Architecture-specific macros
-**************************************/
-#if LZ4_ARCH64   /* 64-bit */
-#  define STEPSIZE 8
-#  define LZ4_COPYSTEP(s,d)     A64(d) = A64(s); d+=8; s+=8;
-#  define LZ4_COPYPACKET(s,d)   LZ4_COPYSTEP(s,d)
-#  define AARCH A64
-#  define HTYPE                 U32
-#  define INITBASE(b,s)         const BYTE* const b = s
-#else            /* 32-bit */
-#  define STEPSIZE 4
-#  define LZ4_COPYSTEP(s,d)     A32(d) = A32(s); d+=4; s+=4;
-#  define LZ4_COPYPACKET(s,d)   LZ4_COPYSTEP(s,d); LZ4_COPYSTEP(s,d);
-#  define AARCH A32
-#  define HTYPE                 U32
-#  define INITBASE(b,s)         const BYTE* const b = s
-#endif
-
-#if defined(LZ4_BIG_ENDIAN)
-#  define LZ4_READ_LITTLEENDIAN_16(d,s,p) { U16 v = A16(p); v = lz4_bswap16(v); d = (s) - v; }
-#  define LZ4_WRITE_LITTLEENDIAN_16(p,i)  { U16 v = (U16)(i); v = lz4_bswap16(v); A16(p) = v; p+=2; }
-#else      /* Little Endian */
-#  define LZ4_READ_LITTLEENDIAN_16(d,s,p) { d = (s) - A16(p); }
-#  define LZ4_WRITE_LITTLEENDIAN_16(p,v)  { A16(p) = v; p+=2; }
-#endif
-
-
-/**************************************
-   Local Types
-**************************************/
-typedef struct
-{
-    const BYTE* inputBuffer;
-    const BYTE* base;
-    const BYTE* end;
-    HTYPE hashTable[HASHTABLESIZE];
-    U16 chainTable[MAXD];
-    const BYTE* nextToUpdate;
-} LZ4HC_Data_Structure;
-
-
-/**************************************
-   Macros
-**************************************/
-#define LZ4_WILDCOPY(s,d,e)    do { LZ4_COPYPACKET(s,d) } while (d<e);
-#define LZ4_BLINDCOPY(s,d,l)   { BYTE* e=d+l; LZ4_WILDCOPY(s,d,e); d=e; }
-#define HASH_FUNCTION(i)       (((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))
-#define HASH_VALUE(p)          HASH_FUNCTION(A32(p))
-#define HASH_POINTER(p)        (HashTable[HASH_VALUE(p)] + base)
-#define DELTANEXT(p)           chainTable[(size_t)(p) & MAXD_MASK]
-#define GETNEXT(p)             ((p) - (size_t)DELTANEXT(p))
-
-
-/**************************************
- Private functions
-**************************************/
-#if LZ4_ARCH64
-
-FORCE_INLINE int LZ4_NbCommonBytes (register U64 val)
-{
-#if defined(LZ4_BIG_ENDIAN)
-#  if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    unsigned long r = 0;
-    _BitScanReverse64( &r, val );
-    return (int)(r>>3);
-#  elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    return (__builtin_clzll(val) >> 3);
-#  else
-    int r;
-    if (!(val>>32)) { r=4; } else { r=0; val>>=32; }
-    if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
-    r += (!val);
-    return r;
-#  endif
-#else
-#  if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    unsigned long r = 0;
-    _BitScanForward64( &r, val );
-    return (int)(r>>3);
-#  elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    return (__builtin_ctzll(val) >> 3);
-#  else
-    static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 };
-    return DeBruijnBytePos[((U64)((val & -val) * 0x0218A392CDABBD3F)) >> 58];
-#  endif
-#endif
-}
-
-#else
-
-FORCE_INLINE int LZ4_NbCommonBytes (register U32 val)
-{
-#if defined(LZ4_BIG_ENDIAN)
-#  if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    unsigned long r;
-    _BitScanReverse( &r, val );
-    return (int)(r>>3);
-#  elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    return (__builtin_clz(val) >> 3);
-#  else
-    int r;
-    if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
-    r += (!val);
-    return r;
-#  endif
-#else
-#  if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    unsigned long r;
-    _BitScanForward( &r, val );
-    return (int)(r>>3);
-#  elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
-    return (__builtin_ctz(val) >> 3);
-#  else
-    static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 };
-    return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27];
-#  endif
-#endif
-}
-
-#endif
-
-
-int LZ4_sizeofStreamStateHC()
-{
-    return sizeof(LZ4HC_Data_Structure);
-}
-
-FORCE_INLINE void LZ4_initHC (LZ4HC_Data_Structure* hc4, const BYTE* base)
-{
-    MEM_INIT((void*)hc4->hashTable, 0, sizeof(hc4->hashTable));
-    MEM_INIT(hc4->chainTable, 0xFF, sizeof(hc4->chainTable));
-    hc4->nextToUpdate = base + 1;
-    hc4->base = base;
-    hc4->inputBuffer = base;
-    hc4->end = base;
-}
-
-int LZ4_resetStreamStateHC(void* state, const char* inputBuffer)
-{
-    if ((((size_t)state) & (sizeof(void*)-1)) != 0) return 1;   /* Error : pointer is not aligned for pointer (32 or 64 bits) */
-    LZ4_initHC((LZ4HC_Data_Structure*)state, (const BYTE*)inputBuffer);
-    return 0;
-}
-
-
-void* LZ4_createHC (const char* inputBuffer)
-{
-    void* hc4 = ALLOCATOR(sizeof(LZ4HC_Data_Structure));
-    LZ4_initHC ((LZ4HC_Data_Structure*)hc4, (const BYTE*)inputBuffer);
-    return hc4;
-}
-
-
-int LZ4_freeHC (void* LZ4HC_Data)
-{
-    FREEMEM(LZ4HC_Data);
-    return (0);
-}
-
-
-/* Update chains up to ip (excluded) */
-FORCE_INLINE void LZ4HC_Insert (LZ4HC_Data_Structure* hc4, const BYTE* ip)
-{
-    U16*   chainTable = hc4->chainTable;
-    HTYPE* HashTable  = hc4->hashTable;
-    INITBASE(base,hc4->base);
-
-    while(hc4->nextToUpdate < ip)
-    {
-        const BYTE* const p = hc4->nextToUpdate;
-        size_t delta = (p) - HASH_POINTER(p);
-        if (delta>MAX_DISTANCE) delta = MAX_DISTANCE;
-        DELTANEXT(p) = (U16)delta;
-        HashTable[HASH_VALUE(p)] = (HTYPE)((p) - base);
-        hc4->nextToUpdate++;
-    }
-}
-
-
-char* LZ4_slideInputBufferHC(void* LZ4HC_Data)
-{
-    LZ4HC_Data_Structure* hc4 = (LZ4HC_Data_Structure*)LZ4HC_Data;
-    U32 distance = (U32)(hc4->end - hc4->inputBuffer) - 64 KB;
-    distance = (distance >> 16) << 16;   /* Must be a multiple of 64 KB */
-    LZ4HC_Insert(hc4, hc4->end - MINMATCH);
-    memcpy((void*)(hc4->end - 64 KB - distance), (const void*)(hc4->end - 64 KB), 64 KB);
-    hc4->nextToUpdate -= distance;
-    hc4->base -= distance;
-    if ((U32)(hc4->inputBuffer - hc4->base) > 1 GB + 64 KB)   /* Avoid overflow */
-    {
-        int i;
-        hc4->base += 1 GB;
-        for (i=0; i<HASHTABLESIZE; i++) hc4->hashTable[i] -= 1 GB;
-    }
-    hc4->end -= distance;
-    return (char*)(hc4->end);
-}
-
-
-FORCE_INLINE size_t LZ4HC_CommonLength (const BYTE* p1, const BYTE* p2, const BYTE* const matchlimit)
-{
-    const BYTE* p1t = p1;
-
-    while (p1t<matchlimit-(STEPSIZE-1))
-    {
-        size_t diff = AARCH(p2) ^ AARCH(p1t);
-        if (!diff) { p1t+=STEPSIZE; p2+=STEPSIZE; continue; }
-        p1t += LZ4_NbCommonBytes(diff);
-        return (p1t - p1);
-    }
-    if (LZ4_ARCH64) if ((p1t<(matchlimit-3)) && (A32(p2) == A32(p1t))) { p1t+=4; p2+=4; }
-    if ((p1t<(matchlimit-1)) && (A16(p2) == A16(p1t))) { p1t+=2; p2+=2; }
-    if ((p1t<matchlimit) && (*p2 == *p1t)) p1t++;
-    return (p1t - p1);
-}
-
-
-FORCE_INLINE int LZ4HC_InsertAndFindBestMatch (LZ4HC_Data_Structure* hc4, const BYTE* ip, const BYTE* const matchlimit, const BYTE** matchpos, const int maxNbAttempts)
-{
-    U16* const chainTable = hc4->chainTable;
-    HTYPE* const HashTable = hc4->hashTable;
-    const BYTE* ref;
-    INITBASE(base,hc4->base);
-    int nbAttempts=maxNbAttempts;
-    size_t repl=0, ml=0;
-    U16 delta=0;  /* useless assignment, to remove an uninitialization warning */
-
-    /* HC4 match finder */
-    LZ4HC_Insert(hc4, ip);
-    ref = HASH_POINTER(ip);
-
-#define REPEAT_OPTIMIZATION
-#ifdef REPEAT_OPTIMIZATION
-    /* Detect repetitive sequences of length <= 4 */
-    if ((U32)(ip-ref) <= 4)        /* potential repetition */
-    {
-        if (A32(ref) == A32(ip))   /* confirmed */
-        {
-            delta = (U16)(ip-ref);
-            repl = ml  = LZ4HC_CommonLength(ip+MINMATCH, ref+MINMATCH, matchlimit) + MINMATCH;
-            *matchpos = ref;
-        }
-        ref = GETNEXT(ref);
-    }
-#endif
-
-    while (((U32)(ip-ref) <= MAX_DISTANCE) && (nbAttempts))
-    {
-        nbAttempts--;
-        if (*(ref+ml) == *(ip+ml))
-        if (A32(ref) == A32(ip))
-        {
-            size_t mlt = LZ4HC_CommonLength(ip+MINMATCH, ref+MINMATCH, matchlimit) + MINMATCH;
-            if (mlt > ml) { ml = mlt; *matchpos = ref; }
-        }
-        ref = GETNEXT(ref);
-    }
-
-#ifdef REPEAT_OPTIMIZATION
-    /* Complete table */
-    if (repl)
-    {
-        const BYTE* ptr = ip;
-        const BYTE* end;
-
-        end = ip + repl - (MINMATCH-1);
-        while(ptr < end-delta)
-        {
-            DELTANEXT(ptr) = delta;    /* Pre-Load */
-            ptr++;
-        }
-        do
-        {
-            DELTANEXT(ptr) = delta;
-            HashTable[HASH_VALUE(ptr)] = (HTYPE)((ptr) - base);     /* Head of chain */
-            ptr++;
-        } while(ptr < end);
-        hc4->nextToUpdate = end;
-    }
-#endif
-
-    return (int)ml;
-}
-
-
-FORCE_INLINE int LZ4HC_InsertAndGetWiderMatch (LZ4HC_Data_Structure* hc4, const BYTE* ip, const BYTE* startLimit, const BYTE* matchlimit, int longest, const BYTE** matchpos, const BYTE** startpos, const int maxNbAttempts)
-{
-    U16* const  chainTable = hc4->chainTable;
-    HTYPE* const HashTable = hc4->hashTable;
-    INITBASE(base,hc4->base);
-    const BYTE*  ref;
-    int nbAttempts = maxNbAttempts;
-    int delta = (int)(ip-startLimit);
-
-    /* First Match */
-    LZ4HC_Insert(hc4, ip);
-    ref = HASH_POINTER(ip);
-
-    while (((U32)(ip-ref) <= MAX_DISTANCE) && (nbAttempts))
-    {
-        nbAttempts--;
-        if (*(startLimit + longest) == *(ref - delta + longest))
-        if (A32(ref) == A32(ip))
-        {
-#if 1
-            const BYTE* reft = ref+MINMATCH;
-            const BYTE* ipt = ip+MINMATCH;
-            const BYTE* startt = ip;
-
-            while (ipt<matchlimit-(STEPSIZE-1))
-            {
-                size_t diff = AARCH(reft) ^ AARCH(ipt);
-                if (!diff) { ipt+=STEPSIZE; reft+=STEPSIZE; continue; }
-                ipt += LZ4_NbCommonBytes(diff);
-                goto _endCount;
-            }
-            if (LZ4_ARCH64) if ((ipt<(matchlimit-3)) && (A32(reft) == A32(ipt))) { ipt+=4; reft+=4; }
-            if ((ipt<(matchlimit-1)) && (A16(reft) == A16(ipt))) { ipt+=2; reft+=2; }
-            if ((ipt<matchlimit) && (*reft == *ipt)) ipt++;
-_endCount:
-            reft = ref;
-#else
-            /* Easier for code maintenance, but unfortunately slower too */
-            const BYTE* startt = ip;
-            const BYTE* reft = ref;
-            const BYTE* ipt = ip + MINMATCH + LZ4HC_CommonLength(ip+MINMATCH, ref+MINMATCH, matchlimit);
-#endif
-
-            while ((startt>startLimit) && (reft > hc4->inputBuffer) && (startt[-1] == reft[-1])) {startt--; reft--;}
-
-            if ((ipt-startt) > longest)
-            {
-                longest = (int)(ipt-startt);
-                *matchpos = reft;
-                *startpos = startt;
-            }
-        }
-        ref = GETNEXT(ref);
-    }
-
-    return longest;
-}
-
-
-typedef enum { noLimit = 0, limitedOutput = 1 } limitedOutput_directive;
-
-FORCE_INLINE int LZ4HC_encodeSequence (
-                       const BYTE** ip,
-                       BYTE** op,
-                       const BYTE** anchor,
-                       int matchLength,
-                       const BYTE* ref,
-                       limitedOutput_directive limitedOutputBuffer,
-                       BYTE* oend)
-{
-    int length;
-    BYTE* token;
-
-    /* Encode Literal length */
-    length = (int)(*ip - *anchor);
-    token = (*op)++;
-    if ((limitedOutputBuffer) && ((*op + length + (2 + 1 + LASTLITERALS) + (length>>8)) > oend)) return 1;   /* Check output limit */
-    if (length>=(int)RUN_MASK) { int len; *token=(RUN_MASK<<ML_BITS); len = length-RUN_MASK; for(; len > 254 ; len-=255) *(*op)++ = 255;  *(*op)++ = (BYTE)len; }
-    else *token = (BYTE)(length<<ML_BITS);
-
-    /* Copy Literals */
-    LZ4_BLINDCOPY(*anchor, *op, length);
-
-    /* Encode Offset */
-    LZ4_WRITE_LITTLEENDIAN_16(*op,(U16)(*ip-ref));
-
-    /* Encode MatchLength */
-    length = (int)(matchLength-MINMATCH);
-    if ((limitedOutputBuffer) && (*op + (1 + LASTLITERALS) + (length>>8) > oend)) return 1;   /* Check output limit */
-    if (length>=(int)ML_MASK) { *token+=ML_MASK; length-=ML_MASK; for(; length > 509 ; length-=510) { *(*op)++ = 255; *(*op)++ = 255; } if (length > 254) { length-=255; *(*op)++ = 255; } *(*op)++ = (BYTE)length; }
-    else *token += (BYTE)(length);
-
-    /* Prepare next loop */
-    *ip += matchLength;
-    *anchor = *ip;
-
-    return 0;
-}
-
-
-#define MAX_COMPRESSION_LEVEL 16
-static int LZ4HC_compress_generic (
-                 void* ctxvoid,
-                 const char* source,
-                 char* dest,
-                 int inputSize,
-                 int maxOutputSize,
-                 int compressionLevel,
-                 limitedOutput_directive limit
-                )
-{
-    LZ4HC_Data_Structure* ctx = (LZ4HC_Data_Structure*) ctxvoid;
-    const BYTE* ip = (const BYTE*) source;
-    const BYTE* anchor = ip;
-    const BYTE* const iend = ip + inputSize;
-    const BYTE* const mflimit = iend - MFLIMIT;
-    const BYTE* const matchlimit = (iend - LASTLITERALS);
-
-    BYTE* op = (BYTE*) dest;
-    BYTE* const oend = op + maxOutputSize;
-
-    const int maxNbAttempts = compressionLevel > MAX_COMPRESSION_LEVEL ? 1 << MAX_COMPRESSION_LEVEL : compressionLevel ? 1<<(compressionLevel-1) : 1<<LZ4HC_DEFAULT_COMPRESSIONLEVEL;
-    int   ml, ml2, ml3, ml0;
-    const BYTE* ref=NULL;
-    const BYTE* start2=NULL;
-    const BYTE* ref2=NULL;
-    const BYTE* start3=NULL;
-    const BYTE* ref3=NULL;
-    const BYTE* start0;
-    const BYTE* ref0;
-
-
-    /* Ensure blocks follow each other */
-    if (ip != ctx->end) return 0;
-    ctx->end += inputSize;
-
-    ip++;
-
-    /* Main Loop */
-    while (ip < mflimit)
-    {
-        ml = LZ4HC_InsertAndFindBestMatch (ctx, ip, matchlimit, (&ref), maxNbAttempts);
-        if (!ml) { ip++; continue; }
-
-        /* saved, in case we would skip too much */
-        start0 = ip;
-        ref0 = ref;
-        ml0 = ml;
-
-_Search2:
-        if (ip+ml < mflimit)
-            ml2 = LZ4HC_InsertAndGetWiderMatch(ctx, ip + ml - 2, ip + 1, matchlimit, ml, &ref2, &start2, maxNbAttempts);
-        else ml2 = ml;
-
-        if (ml2 == ml)  /* No better match */
-        {
-            if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
-            continue;
-        }
-
-        if (start0 < ip)
-        {
-            if (start2 < ip + ml0)   /* empirical */
-            {
-                ip = start0;
-                ref = ref0;
-                ml = ml0;
-            }
-        }
-
-        /* Here, start0==ip */
-        if ((start2 - ip) < 3)   /* First Match too small : removed */
-        {
-            ml = ml2;
-            ip = start2;
-            ref =ref2;
-            goto _Search2;
-        }
-
-_Search3:
-        /*
-         * Currently we have :
-         * ml2 > ml1, and
-         * ip1+3 <= ip2 (usually < ip1+ml1)
-         */
-        if ((start2 - ip) < OPTIMAL_ML)
-        {
-            int correction;
-            int new_ml = ml;
-            if (new_ml > OPTIMAL_ML) new_ml = OPTIMAL_ML;
-            if (ip+new_ml > start2 + ml2 - MINMATCH) new_ml = (int)(start2 - ip) + ml2 - MINMATCH;
-            correction = new_ml - (int)(start2 - ip);
-            if (correction > 0)
-            {
-                start2 += correction;
-                ref2 += correction;
-                ml2 -= correction;
-            }
-        }
-        /* Now, we have start2 = ip+new_ml, with new_ml = min(ml, OPTIMAL_ML=18) */
-
-        if (start2 + ml2 < mflimit)
-            ml3 = LZ4HC_InsertAndGetWiderMatch(ctx, start2 + ml2 - 3, start2, matchlimit, ml2, &ref3, &start3, maxNbAttempts);
-        else ml3 = ml2;
-
-        if (ml3 == ml2) /* No better match : 2 sequences to encode */
-        {
-            /* ip & ref are known; Now for ml */
-            if (start2 < ip+ml)  ml = (int)(start2 - ip);
-            /* Now, encode 2 sequences */
-            if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
-            ip = start2;
-            if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml2, ref2, limit, oend)) return 0;
-            continue;
-        }
-
-        if (start3 < ip+ml+3) /* Not enough space for match 2 : remove it */
-        {
-            if (start3 >= (ip+ml)) /* can write Seq1 immediately ==> Seq2 is removed, so Seq3 becomes Seq1 */
-            {
-                if (start2 < ip+ml)
-                {
-                    int correction = (int)(ip+ml - start2);
-                    start2 += correction;
-                    ref2 += correction;
-                    ml2 -= correction;
-                    if (ml2 < MINMATCH)
-                    {
-                        start2 = start3;
-                        ref2 = ref3;
-                        ml2 = ml3;
-                    }
-                }
-
-                if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
-                ip  = start3;
-                ref = ref3;
-                ml  = ml3;
-
-                start0 = start2;
-                ref0 = ref2;
-                ml0 = ml2;
-                goto _Search2;
-            }
-
-            start2 = start3;
-            ref2 = ref3;
-            ml2 = ml3;
-            goto _Search3;
-        }
-
-        /*
-         * OK, now we have 3 ascending matches; let's write at least the first one
-         * ip & ref are known; Now for ml
-         */
-        if (start2 < ip+ml)
-        {
-            if ((start2 - ip) < (int)ML_MASK)
-            {
-                int correction;
-                if (ml > OPTIMAL_ML) ml = OPTIMAL_ML;
-                if (ip + ml > start2 + ml2 - MINMATCH) ml = (int)(start2 - ip) + ml2 - MINMATCH;
-                correction = ml - (int)(start2 - ip);
-                if (correction > 0)
-                {
-                    start2 += correction;
-                    ref2 += correction;
-                    ml2 -= correction;
-                }
-            }
-            else
-            {
-                ml = (int)(start2 - ip);
-            }
-        }
-        if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
-
-        ip = start2;
-        ref = ref2;
-        ml = ml2;
-
-        start2 = start3;
-        ref2 = ref3;
-        ml2 = ml3;
-
-        goto _Search3;
-
-    }
-
-    /* Encode Last Literals */
-    {
-        int lastRun = (int)(iend - anchor);
-        if ((limit) && (((char*)op - dest) + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > (U32)maxOutputSize)) return 0;  /* Check output limit */
-        if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK<<ML_BITS); lastRun-=RUN_MASK; for(; lastRun > 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; }
-        else *op++ = (BYTE)(lastRun<<ML_BITS);
-        memcpy(op, anchor, iend - anchor);
-        op += iend-anchor;
-    }
-
-    /* End */
-    return (int) (((char*)op)-dest);
-}
-
-
-int LZ4_compressHC2(const char* source, char* dest, int inputSize, int compressionLevel)
-{
-    void* ctx = LZ4_createHC(source);
-    int result;
-    if (ctx==NULL) return 0;
-
-    result = LZ4HC_compress_generic (ctx, source, dest, inputSize, 0, compressionLevel, noLimit);
-
-    LZ4_freeHC(ctx);
-    return result;
-}
-
-int LZ4_compressHC(const char* source, char* dest, int inputSize) { return LZ4_compressHC2(source, dest, inputSize, 0); }
-
-int LZ4_compressHC2_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
-{
-    void* ctx = LZ4_createHC(source);
-    int result;
-    if (ctx==NULL) return 0;
-
-    result = LZ4HC_compress_generic (ctx, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
-
-    LZ4_freeHC(ctx);
-    return result;
-}
-
-int LZ4_compressHC_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize)
-{
-    return LZ4_compressHC2_limitedOutput(source, dest, inputSize, maxOutputSize, 0);
-}
-
-
-/*****************************
-   Using external allocation
-*****************************/
-int LZ4_sizeofStateHC() { return sizeof(LZ4HC_Data_Structure); }
-
-
-int LZ4_compressHC2_withStateHC (void* state, const char* source, char* dest, int inputSize, int compressionLevel)
-{
-    if (((size_t)(state)&(sizeof(void*)-1)) != 0) return 0;   /* Error : state is not aligned for pointers (32 or 64 bits) */
-    LZ4_initHC ((LZ4HC_Data_Structure*)state, (const BYTE*)source);
-    return LZ4HC_compress_generic (state, source, dest, inputSize, 0, compressionLevel, noLimit);
-}
-
-int LZ4_compressHC_withStateHC (void* state, const char* source, char* dest, int inputSize)
-{ return LZ4_compressHC2_withStateHC (state, source, dest, inputSize, 0); }
-
-
-int LZ4_compressHC2_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
-{
-    if (((size_t)(state)&(sizeof(void*)-1)) != 0) return 0;   /* Error : state is not aligned for pointers (32 or 64 bits) */
-    LZ4_initHC ((LZ4HC_Data_Structure*)state, (const BYTE*)source);
-    return LZ4HC_compress_generic (state, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
-}
-
-int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize)
-{ return LZ4_compressHC2_limitedOutput_withStateHC (state, source, dest, inputSize, maxOutputSize, 0); }
-
-
-/****************************
-   Stream functions
-****************************/
-
-int LZ4_compressHC_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize)
-{
-    return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, 0, 0, noLimit);
-}
-
-int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel)
-{
-    return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, 0, compressionLevel, noLimit);
-}
-
-int LZ4_compressHC_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize)
-{
-    return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, maxOutputSize, 0, limitedOutput);
-}
-
-int LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
-{
-    return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
-}
diff --git a/ext/lz4/lz4hc.h b/ext/lz4/lz4hc.h
deleted file mode 100644
index deb23940..00000000
--- a/ext/lz4/lz4hc.h
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
-   LZ4 HC - High Compression Mode of LZ4
-   Header File
-   Copyright (C) 2011-2014, Yann Collet.
-   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
-   Redistribution and use in source and binary forms, with or without
-   modification, are permitted provided that the following conditions are
-   met:
-
-       * Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-       * Redistributions in binary form must reproduce the above
-   copyright notice, this list of conditions and the following disclaimer
-   in the documentation and/or other materials provided with the
-   distribution.
-
-   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-   You can contact the author at :
-   - LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
-   - LZ4 source repository : http://code.google.com/p/lz4/
-*/
-#pragma once
-
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-int LZ4_compressHC (const char* source, char* dest, int inputSize);
-/*
-LZ4_compressHC :
-    return : the number of bytes in compressed buffer dest
-             or 0 if compression fails.
-    note : destination buffer must be already allocated.
-        To avoid any problem, size it to handle worst cases situations (input data not compressible)
-        Worst case size evaluation is provided by function LZ4_compressBound() (see "lz4.h")
-*/
-
-int LZ4_compressHC_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize);
-/*
-LZ4_compress_limitedOutput() :
-    Compress 'inputSize' bytes from 'source' into an output buffer 'dest' of maximum size 'maxOutputSize'.
-    If it cannot achieve it, compression will stop, and result of the function will be zero.
-    This function never writes outside of provided output buffer.
-
-    inputSize  : Max supported value is 1 GB
-    maxOutputSize : is maximum allowed size into the destination buffer (which must be already allocated)
-    return : the number of output bytes written in buffer 'dest'
-             or 0 if compression fails.
-*/
-
-
-int LZ4_compressHC2 (const char* source, char* dest, int inputSize, int compressionLevel);
-int LZ4_compressHC2_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
-/*
-    Same functions as above, but with programmable 'compressionLevel'.
-    Recommended values are between 4 and 9, although any value between 0 and 16 will work.
-    'compressionLevel'==0 means use default 'compressionLevel' value.
-    Values above 16 behave the same as 16.
-    Equivalent variants exist for all other compression functions below.
-*/
-
-/* Note :
-Decompression functions are provided within LZ4 source code (see "lz4.h") (BSD license)
-*/
-
-
-/**************************************
-   Using an external allocation
-**************************************/
-int LZ4_sizeofStateHC(void);
-int LZ4_compressHC_withStateHC               (void* state, const char* source, char* dest, int inputSize);
-int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
-
-int LZ4_compressHC2_withStateHC              (void* state, const char* source, char* dest, int inputSize, int compressionLevel);
-int LZ4_compressHC2_limitedOutput_withStateHC(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
-
-/*
-These functions are provided should you prefer to allocate memory for compression tables with your own allocation methods.
-To know how much memory must be allocated for the compression tables, use :
-int LZ4_sizeofStateHC();
-
-Note that tables must be aligned for pointer (32 or 64 bits), otherwise compression will fail (return code 0).
-
-The allocated memory can be provided to the compressions functions using 'void* state' parameter.
-LZ4_compress_withStateHC() and LZ4_compress_limitedOutput_withStateHC() are equivalent to previously described functions.
-They just use the externally allocated memory area instead of allocating their own (on stack, or on heap).
-*/
-
-
-/**************************************
-   Streaming Functions
-**************************************/
-/* Note : these streaming functions still follows the older model */
-void* LZ4_createHC (const char* inputBuffer);
-int   LZ4_compressHC_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize);
-int   LZ4_compressHC_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize);
-char* LZ4_slideInputBufferHC (void* LZ4HC_Data);
-int   LZ4_freeHC (void* LZ4HC_Data);
-
-int   LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);
-int   LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
-
-/*
-These functions allow the compression of dependent blocks, where each block benefits from prior 64 KB within preceding blocks.
-In order to achieve this, it is necessary to start creating the LZ4HC Data Structure, thanks to the function :
-
-void* LZ4_createHC (const char* inputBuffer);
-The result of the function is the (void*) pointer on the LZ4HC Data Structure.
-This pointer will be needed in all other functions.
-If the pointer returned is NULL, then the allocation has failed, and compression must be aborted.
-The only parameter 'const char* inputBuffer' must, obviously, point at the beginning of input buffer.
-The input buffer must be already allocated, and size at least 192KB.
-'inputBuffer' will also be the 'const char* source' of the first block.
-
-All blocks are expected to lay next to each other within the input buffer, starting from 'inputBuffer'.
-To compress each block, use either LZ4_compressHC_continue() or LZ4_compressHC_limitedOutput_continue().
-Their behavior are identical to LZ4_compressHC() or LZ4_compressHC_limitedOutput(),
-but require the LZ4HC Data Structure as their first argument, and check that each block starts right after the previous one.
-If next block does not begin immediately after the previous one, the compression will fail (return 0).
-
-When it's no longer possible to lay the next block after the previous one (not enough space left into input buffer), a call to :
-char* LZ4_slideInputBufferHC(void* LZ4HC_Data);
-must be performed. It will typically copy the latest 64KB of input at the beginning of input buffer.
-Note that, for this function to work properly, minimum size of an input buffer must be 192KB.
-==> The memory position where the next input data block must start is provided as the result of the function.
-
-Compression can then resume, using LZ4_compressHC_continue() or LZ4_compressHC_limitedOutput_continue(), as usual.
-
-When compression is completed, a call to LZ4_freeHC() will release the memory used by the LZ4HC Data Structure.
-*/
-
-int LZ4_sizeofStreamStateHC(void);
-int LZ4_resetStreamStateHC(void* state, const char* inputBuffer);
-
-/*
-These functions achieve the same result as :
-void* LZ4_createHC (const char* inputBuffer);
-
-They are provided here to allow the user program to allocate memory using its own routines.
-
-To know how much space must be allocated, use LZ4_sizeofStreamStateHC();
-Note also that space must be aligned for pointers (32 or 64 bits).
-
-Once space is allocated, you must initialize it using : LZ4_resetStreamStateHC(void* state, const char* inputBuffer);
-void* state is a pointer to the space allocated.
-It must be aligned for pointers (32 or 64 bits), and be large enough.
-The parameter 'const char* inputBuffer' must, obviously, point at the beginning of input buffer.
-The input buffer must be already allocated, and size at least 192KB.
-'inputBuffer' will also be the 'const char* source' of the first block.
-
-The same space can be re-used multiple times, just by initializing it each time with LZ4_resetStreamState().
-return value of LZ4_resetStreamStateHC() must be 0 is OK.
-Any other value means there was an error (typically, state is not aligned for pointers (32 or 64 bits)).
-*/
-
-
-#if defined (__cplusplus)
-}
-#endif