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-rw-r--r--lib/sqfs/comp/lz4/lz4.c1708
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diff --git a/lib/sqfs/comp/lz4/lz4.c b/lib/sqfs/comp/lz4/lz4.c
deleted file mode 100644
index 853d228..0000000
--- a/lib/sqfs/comp/lz4/lz4.c
+++ /dev/null
@@ -1,1708 +0,0 @@
-/*
- LZ4 - Fast LZ compression algorithm
- Copyright (C) 2011-present, 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://www.lz4.org
- - LZ4 source repository : https://github.com/lz4/lz4
-*/
-
-/*-************************************
-* Tuning parameters
-**************************************/
-/*
- * LZ4_HEAPMODE :
- * Select how default compression functions will allocate memory for their hash table,
- * in memory stack (0:default, fastest), or in memory heap (1:requires malloc()).
- */
-#ifndef LZ4_HEAPMODE
-# define LZ4_HEAPMODE 0
-#endif
-
-/*
- * ACCELERATION_DEFAULT :
- * Select "acceleration" for LZ4_compress_fast() when parameter value <= 0
- */
-#define ACCELERATION_DEFAULT 1
-
-
-/*-************************************
-* CPU Feature Detection
-**************************************/
-/* LZ4_FORCE_MEMORY_ACCESS
- * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
- * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
- * The below switch allow to select different access method for improved performance.
- * Method 0 (default) : use `memcpy()`. Safe and portable.
- * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable).
- * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
- * Method 2 : direct access. This method is portable but violate C standard.
- * It can generate buggy code on targets which assembly generation depends on alignment.
- * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6)
- * See https://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details.
- * Prefer these methods in priority order (0 > 1 > 2)
- */
-#ifndef LZ4_FORCE_MEMORY_ACCESS /* can be defined externally */
-# if defined(__GNUC__) && \
- ( defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) \
- || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) )
-# define LZ4_FORCE_MEMORY_ACCESS 2
-# elif (defined(__INTEL_COMPILER) && !defined(_WIN32)) || defined(__GNUC__)
-# define LZ4_FORCE_MEMORY_ACCESS 1
-# endif
-#endif
-
-/*
- * LZ4_FORCE_SW_BITCOUNT
- * 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 WinCE doesn't support Hardware bit count */
-# define LZ4_FORCE_SW_BITCOUNT
-#endif
-
-
-
-/*-************************************
-* Dependency
-**************************************/
-/*
- * LZ4_SRC_INCLUDED:
- * Amalgamation flag, whether lz4.c is included
- */
-#ifndef LZ4_SRC_INCLUDED
-# define LZ4_SRC_INCLUDED 1
-#endif
-
-#ifndef LZ4_STATIC_LINKING_ONLY
-#define LZ4_STATIC_LINKING_ONLY
-#endif
-
-#ifndef LZ4_DISABLE_DEPRECATE_WARNINGS
-#define LZ4_DISABLE_DEPRECATE_WARNINGS /* due to LZ4_decompress_safe_withPrefix64k */
-#endif
-
-#define LZ4_STATIC_LINKING_ONLY /* LZ4_DISTANCE_MAX */
-#include "lz4.h"
-/* see also "memory routines" below */
-
-
-/*-************************************
-* Compiler Options
-**************************************/
-#ifdef _MSC_VER /* Visual Studio */
-# include <intrin.h>
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-# pragma warning(disable : 4293) /* disable: C4293: too large shift (32-bits) */
-#endif /* _MSC_VER */
-
-#ifndef LZ4_FORCE_INLINE
-# ifdef _MSC_VER /* Visual Studio */
-# define LZ4_FORCE_INLINE static __forceinline
-# else
-# if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */
-# ifdef __GNUC__
-# define LZ4_FORCE_INLINE static inline __attribute__((always_inline))
-# else
-# define LZ4_FORCE_INLINE static inline
-# endif
-# else
-# define LZ4_FORCE_INLINE static
-# endif /* __STDC_VERSION__ */
-# endif /* _MSC_VER */
-#endif /* LZ4_FORCE_INLINE */
-
-/* LZ4_FORCE_O2_GCC_PPC64LE and LZ4_FORCE_O2_INLINE_GCC_PPC64LE
- * gcc on ppc64le generates an unrolled SIMDized loop for LZ4_wildCopy8,
- * together with a simple 8-byte copy loop as a fall-back path.
- * However, this optimization hurts the decompression speed by >30%,
- * because the execution does not go to the optimized loop
- * for typical compressible data, and all of the preamble checks
- * before going to the fall-back path become useless overhead.
- * This optimization happens only with the -O3 flag, and -O2 generates
- * a simple 8-byte copy loop.
- * With gcc on ppc64le, all of the LZ4_decompress_* and LZ4_wildCopy8
- * functions are annotated with __attribute__((optimize("O2"))),
- * and also LZ4_wildCopy8 is forcibly inlined, so that the O2 attribute
- * of LZ4_wildCopy8 does not affect the compression speed.
- */
-#if defined(__PPC64__) && defined(__LITTLE_ENDIAN__) && defined(__GNUC__) && !defined(__clang__)
-# define LZ4_FORCE_O2_GCC_PPC64LE __attribute__((optimize("O2")))
-# define LZ4_FORCE_O2_INLINE_GCC_PPC64LE __attribute__((optimize("O2"))) LZ4_FORCE_INLINE
-#else
-# define LZ4_FORCE_O2_GCC_PPC64LE
-# define LZ4_FORCE_O2_INLINE_GCC_PPC64LE static
-#endif
-
-#if (defined(__GNUC__) && (__GNUC__ >= 3)) || (defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 800)) || defined(__clang__)
-# define expect(expr,value) (__builtin_expect ((expr),(value)) )
-#else
-# define expect(expr,value) (expr)
-#endif
-
-#ifndef likely
-#define likely(expr) expect((expr) != 0, 1)
-#endif
-#ifndef unlikely
-#define unlikely(expr) expect((expr) != 0, 0)
-#endif
-
-
-/*-************************************
-* Memory routines
-**************************************/
-#include <stdlib.h> /* malloc, calloc, free */
-#define ALLOC(s) malloc(s)
-#define ALLOC_AND_ZERO(s) calloc(1,s)
-#define FREEMEM(p) free(p)
-#include <string.h> /* memset, memcpy */
-#define MEM_INIT(p,v,s) memset((p),(v),(s))
-
-
-/*-************************************
-* Common Constants
-**************************************/
-#define MINMATCH 4
-
-#define WILDCOPYLENGTH 8
-#define LASTLITERALS 5 /* see ../doc/lz4_Block_format.md#parsing-restrictions */
-#define MFLIMIT 12 /* see ../doc/lz4_Block_format.md#parsing-restrictions */
-#define MATCH_SAFEGUARD_DISTANCE ((2*WILDCOPYLENGTH) - MINMATCH) /* ensure it's possible to write 2 x wildcopyLength without overflowing output buffer */
-#define FASTLOOP_SAFE_DISTANCE 64
-static const int LZ4_minLength = (MFLIMIT+1);
-
-#define KB *(1 <<10)
-#define MB *(1 <<20)
-#define GB *(1U<<30)
-
-#define LZ4_DISTANCE_ABSOLUTE_MAX 65535
-#if (LZ4_DISTANCE_MAX > LZ4_DISTANCE_ABSOLUTE_MAX) /* max supported by LZ4 format */
-# error "LZ4_DISTANCE_MAX is too big : must be <= 65535"
-#endif
-
-#define ML_BITS 4
-#define ML_MASK ((1U<<ML_BITS)-1)
-#define RUN_BITS (8-ML_BITS)
-#define RUN_MASK ((1U<<RUN_BITS)-1)
-
-
-/*-************************************
-* Error detection
-**************************************/
-#if defined(LZ4_DEBUG) && (LZ4_DEBUG>=1)
-# include <assert.h>
-#else
-# ifndef assert
-# define assert(condition) ((void)0)
-# endif
-#endif
-
-#define LZ4_STATIC_ASSERT(c) { enum { LZ4_static_assert = 1/(int)(!!(c)) }; } /* use after variable declarations */
-
-#if defined(LZ4_DEBUG) && (LZ4_DEBUG>=2)
-# include <stdio.h>
-static int g_debuglog_enable = 1;
-# define DEBUGLOG(l, ...) { \
- if ((g_debuglog_enable) && (l<=LZ4_DEBUG)) { \
- fprintf(stderr, __FILE__ ": "); \
- fprintf(stderr, __VA_ARGS__); \
- fprintf(stderr, " \n"); \
- } }
-#else
-# define DEBUGLOG(l, ...) {} /* disabled */
-#endif
-
-
-/*-************************************
-* Types
-**************************************/
-#if defined(__cplusplus) || (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;
- typedef uintptr_t uptrval;
-#else
- typedef unsigned char BYTE;
- typedef unsigned short U16;
- typedef unsigned int U32;
- typedef signed int S32;
- typedef unsigned long long U64;
- typedef size_t uptrval; /* generally true, except OpenVMS-64 */
-#endif
-
-#if defined(__x86_64__)
- typedef U64 reg_t; /* 64-bits in x32 mode */
-#else
- typedef size_t reg_t; /* 32-bits in x32 mode */
-#endif
-
-typedef enum {
- notLimited = 0,
- limitedOutput = 1,
- fillOutput = 2
-} limitedOutput_directive;
-
-
-/*-************************************
-* Reading and writing into memory
-**************************************/
-static unsigned LZ4_isLittleEndian(void)
-{
- const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */
- return one.c[0];
-}
-
-
-#if defined(LZ4_FORCE_MEMORY_ACCESS) && (LZ4_FORCE_MEMORY_ACCESS==2)
-/* lie to the compiler about data alignment; use with caution */
-
-static U16 LZ4_read16(const void* memPtr) { return *(const U16*) memPtr; }
-static U32 LZ4_read32(const void* memPtr) { return *(const U32*) memPtr; }
-static reg_t LZ4_read_ARCH(const void* memPtr) { return *(const reg_t*) memPtr; }
-
-static void LZ4_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
-static void LZ4_write32(void* memPtr, U32 value) { *(U32*)memPtr = value; }
-
-#elif defined(LZ4_FORCE_MEMORY_ACCESS) && (LZ4_FORCE_MEMORY_ACCESS==1)
-
-/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
-/* currently only defined for gcc and icc */
-typedef union { U16 u16; U32 u32; reg_t uArch; } __attribute__((packed)) unalign;
-
-static U16 LZ4_read16(const void* ptr) { return ((const unalign*)ptr)->u16; }
-static U32 LZ4_read32(const void* ptr) { return ((const unalign*)ptr)->u32; }
-static reg_t LZ4_read_ARCH(const void* ptr) { return ((const unalign*)ptr)->uArch; }
-
-static void LZ4_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; }
-static void LZ4_write32(void* memPtr, U32 value) { ((unalign*)memPtr)->u32 = value; }
-
-#else /* safe and portable access using memcpy() */
-
-static U16 LZ4_read16(const void* memPtr)
-{
- U16 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-static U32 LZ4_read32(const void* memPtr)
-{
- U32 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-static reg_t LZ4_read_ARCH(const void* memPtr)
-{
- reg_t val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-static void LZ4_write16(void* memPtr, U16 value)
-{
- memcpy(memPtr, &value, sizeof(value));
-}
-
-static void LZ4_write32(void* memPtr, U32 value)
-{
- memcpy(memPtr, &value, sizeof(value));
-}
-
-#endif /* LZ4_FORCE_MEMORY_ACCESS */
-
-
-static U16 LZ4_readLE16(const void* memPtr)
-{
- if (LZ4_isLittleEndian()) {
- return LZ4_read16(memPtr);
- } else {
- const BYTE* p = (const BYTE*)memPtr;
- return (U16)((U16)p[0] + (p[1]<<8));
- }
-}
-
-static void LZ4_writeLE16(void* memPtr, U16 value)
-{
- if (LZ4_isLittleEndian()) {
- LZ4_write16(memPtr, value);
- } else {
- BYTE* p = (BYTE*)memPtr;
- p[0] = (BYTE) value;
- p[1] = (BYTE)(value>>8);
- }
-}
-
-/* customized variant of memcpy, which can overwrite up to 8 bytes beyond dstEnd */
-LZ4_FORCE_O2_INLINE_GCC_PPC64LE
-void LZ4_wildCopy8(void* dstPtr, const void* srcPtr, void* dstEnd)
-{
- BYTE* d = (BYTE*)dstPtr;
- const BYTE* s = (const BYTE*)srcPtr;
- BYTE* const e = (BYTE*)dstEnd;
-
- do { memcpy(d,s,8); d+=8; s+=8; } while (d<e);
-}
-
-static const unsigned inc32table[8] = {0, 1, 2, 1, 0, 4, 4, 4};
-static const int dec64table[8] = {0, 0, 0, -1, -4, 1, 2, 3};
-
-
-#ifndef LZ4_FAST_DEC_LOOP
-# if defined(__i386__) || defined(__x86_64__)
-# define LZ4_FAST_DEC_LOOP 1
-# elif defined(__aarch64__) && !defined(__clang__)
- /* On aarch64, we disable this optimization for clang because on certain
- * mobile chipsets and clang, it reduces performance. For more information
- * refer to https://github.com/lz4/lz4/pull/707. */
-# define LZ4_FAST_DEC_LOOP 1
-# else
-# define LZ4_FAST_DEC_LOOP 0
-# endif
-#endif
-
-#if LZ4_FAST_DEC_LOOP
-
-LZ4_FORCE_O2_INLINE_GCC_PPC64LE void
-LZ4_memcpy_using_offset_base(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, const size_t offset)
-{
- if (offset < 8) {
- dstPtr[0] = srcPtr[0];
- dstPtr[1] = srcPtr[1];
- dstPtr[2] = srcPtr[2];
- dstPtr[3] = srcPtr[3];
- srcPtr += inc32table[offset];
- memcpy(dstPtr+4, srcPtr, 4);
- srcPtr -= dec64table[offset];
- dstPtr += 8;
- } else {
- memcpy(dstPtr, srcPtr, 8);
- dstPtr += 8;
- srcPtr += 8;
- }
-
- LZ4_wildCopy8(dstPtr, srcPtr, dstEnd);
-}
-
-/* customized variant of memcpy, which can overwrite up to 32 bytes beyond dstEnd
- * this version copies two times 16 bytes (instead of one time 32 bytes)
- * because it must be compatible with offsets >= 16. */
-LZ4_FORCE_O2_INLINE_GCC_PPC64LE void
-LZ4_wildCopy32(void* dstPtr, const void* srcPtr, void* dstEnd)
-{
- BYTE* d = (BYTE*)dstPtr;
- const BYTE* s = (const BYTE*)srcPtr;
- BYTE* const e = (BYTE*)dstEnd;
-
- do { memcpy(d,s,16); memcpy(d+16,s+16,16); d+=32; s+=32; } while (d<e);
-}
-
-/* LZ4_memcpy_using_offset() presumes :
- * - dstEnd >= dstPtr + MINMATCH
- * - there is at least 8 bytes available to write after dstEnd */
-LZ4_FORCE_O2_INLINE_GCC_PPC64LE void
-LZ4_memcpy_using_offset(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, const size_t offset)
-{
- BYTE v[8];
-
- assert(dstEnd >= dstPtr + MINMATCH);
- LZ4_write32(dstPtr, 0); /* silence an msan warning when offset==0 */
-
- switch(offset) {
- case 1:
- memset(v, *srcPtr, 8);
- break;
- case 2:
- memcpy(v, srcPtr, 2);
- memcpy(&v[2], srcPtr, 2);
- memcpy(&v[4], &v[0], 4);
- break;
- case 4:
- memcpy(v, srcPtr, 4);
- memcpy(&v[4], srcPtr, 4);
- break;
- default:
- LZ4_memcpy_using_offset_base(dstPtr, srcPtr, dstEnd, offset);
- return;
- }
-
- memcpy(dstPtr, v, 8);
- dstPtr += 8;
- while (dstPtr < dstEnd) {
- memcpy(dstPtr, v, 8);
- dstPtr += 8;
- }
-}
-#endif
-
-
-/*-************************************
-* Common functions
-**************************************/
-static unsigned LZ4_NbCommonBytes (reg_t val)
-{
- if (LZ4_isLittleEndian()) {
- if (sizeof(val)==8) {
-# if defined(_MSC_VER) && defined(_WIN64) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r = 0;
- _BitScanForward64( &r, (U64)val );
- return (int)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (unsigned)__builtin_ctzll((U64)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 & -(long long)val) * 0x0218A392CDABBD3FULL)) >> 58];
-# endif
- } else /* 32 bits */ {
-# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r;
- _BitScanForward( &r, (U32)val );
- return (int)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (unsigned)__builtin_ctz((U32)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
- }
- } else /* Big Endian CPU */ {
- if (sizeof(val)==8) { /* 64-bits */
-# if defined(_MSC_VER) && defined(_WIN64) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r = 0;
- _BitScanReverse64( &r, val );
- return (unsigned)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (unsigned)__builtin_clzll((U64)val) >> 3;
-# else
- static const U32 by32 = sizeof(val)*4; /* 32 on 64 bits (goal), 16 on 32 bits.
- Just to avoid some static analyzer complaining about shift by 32 on 32-bits target.
- Note that this code path is never triggered in 32-bits mode. */
- unsigned r;
- if (!(val>>by32)) { r=4; } else { r=0; val>>=by32; }
- if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
- r += (!val);
- return r;
-# endif
- } else /* 32 bits */ {
-# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
- unsigned long r = 0;
- _BitScanReverse( &r, (unsigned long)val );
- return (unsigned)(r>>3);
-# elif (defined(__clang__) || (defined(__GNUC__) && (__GNUC__>=3))) && !defined(LZ4_FORCE_SW_BITCOUNT)
- return (unsigned)__builtin_clz((U32)val) >> 3;
-# else
- unsigned r;
- if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
- r += (!val);
- return r;
-# endif
- }
- }
-}
-
-#define STEPSIZE sizeof(reg_t)
-LZ4_FORCE_INLINE
-unsigned LZ4_count(const BYTE* pIn, const BYTE* pMatch, const BYTE* pInLimit)
-{
- const BYTE* const pStart = pIn;
-
- if (likely(pIn < pInLimit-(STEPSIZE-1))) {
- reg_t const diff = LZ4_read_ARCH(pMatch) ^ LZ4_read_ARCH(pIn);
- if (!diff) {
- pIn+=STEPSIZE; pMatch+=STEPSIZE;
- } else {
- return LZ4_NbCommonBytes(diff);
- } }
-
- while (likely(pIn < pInLimit-(STEPSIZE-1))) {
- reg_t const diff = LZ4_read_ARCH(pMatch) ^ LZ4_read_ARCH(pIn);
- if (!diff) { pIn+=STEPSIZE; pMatch+=STEPSIZE; continue; }
- pIn += LZ4_NbCommonBytes(diff);
- return (unsigned)(pIn - pStart);
- }
-
- if ((STEPSIZE==8) && (pIn<(pInLimit-3)) && (LZ4_read32(pMatch) == LZ4_read32(pIn))) { pIn+=4; pMatch+=4; }
- if ((pIn<(pInLimit-1)) && (LZ4_read16(pMatch) == LZ4_read16(pIn))) { pIn+=2; pMatch+=2; }
- if ((pIn<pInLimit) && (*pMatch == *pIn)) pIn++;
- return (unsigned)(pIn - pStart);
-}
-
-
-#ifndef LZ4_COMMONDEFS_ONLY
-/*-************************************
-* Local Constants
-**************************************/
-static const int LZ4_64Klimit = ((64 KB) + (MFLIMIT-1));
-static const U32 LZ4_skipTrigger = 6; /* Increase this value ==> compression run slower on incompressible data */
-
-
-/*-************************************
-* Local Structures and types
-**************************************/
-typedef enum { clearedTable = 0, byPtr, byU32, byU16 } tableType_t;
-
-/**
- * This enum distinguishes several different modes of accessing previous
- * content in the stream.
- *
- * - noDict : There is no preceding content.
- * - withPrefix64k : Table entries up to ctx->dictSize before the current blob
- * blob being compressed are valid and refer to the preceding
- * content (of length ctx->dictSize), which is available
- * contiguously preceding in memory the content currently
- * being compressed.
- * - usingExtDict : Like withPrefix64k, but the preceding content is somewhere
- * else in memory, starting at ctx->dictionary with length
- * ctx->dictSize.
- * - usingDictCtx : Like usingExtDict, but everything concerning the preceding
- * content is in a separate context, pointed to by
- * ctx->dictCtx. ctx->dictionary, ctx->dictSize, and table
- * entries in the current context that refer to positions
- * preceding the beginning of the current compression are
- * ignored. Instead, ctx->dictCtx->dictionary and ctx->dictCtx
- * ->dictSize describe the location and size of the preceding
- * content, and matches are found by looking in the ctx
- * ->dictCtx->hashTable.
- */
-typedef enum { noDict = 0, withPrefix64k, usingExtDict, usingDictCtx } dict_directive;
-typedef enum { noDictIssue = 0, dictSmall } dictIssue_directive;
-
-
-/*-************************************
-* Local Utils
-**************************************/
-int LZ4_compressBound(int isize) { return LZ4_COMPRESSBOUND(isize); }
-
-/*-******************************
-* Compression functions
-********************************/
-static U32 LZ4_hash4(U32 sequence, tableType_t const tableType)
-{
- if (tableType == byU16)
- return ((sequence * 2654435761U) >> ((MINMATCH*8)-(LZ4_HASHLOG+1)));
- else
- return ((sequence * 2654435761U) >> ((MINMATCH*8)-LZ4_HASHLOG));
-}
-
-static U32 LZ4_hash5(U64 sequence, tableType_t const tableType)
-{
- const U32 hashLog = (tableType == byU16) ? LZ4_HASHLOG+1 : LZ4_HASHLOG;
- if (LZ4_isLittleEndian()) {
- const U64 prime5bytes = 889523592379ULL;
- return (U32)(((sequence << 24) * prime5bytes) >> (64 - hashLog));
- } else {
- const U64 prime8bytes = 11400714785074694791ULL;
- return (U32)(((sequence >> 24) * prime8bytes) >> (64 - hashLog));
- }
-}
-
-LZ4_FORCE_INLINE U32 LZ4_hashPosition(const void* const p, tableType_t const tableType)
-{
- if ((sizeof(reg_t)==8) && (tableType != byU16)) return LZ4_hash5(LZ4_read_ARCH(p), tableType);
- return LZ4_hash4(LZ4_read32(p), tableType);
-}
-
-static void LZ4_clearHash(U32 h, void* tableBase, tableType_t const tableType)
-{
- switch (tableType)
- {
- default: /* fallthrough */
- case clearedTable: { /* illegal! */ assert(0); return; }
- case byPtr: { const BYTE** hashTable = (const BYTE**)tableBase; hashTable[h] = NULL; return; }
- case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = 0; return; }
- case byU16: { U16* hashTable = (U16*) tableBase; hashTable[h] = 0; return; }
- }
-}
-
-static void LZ4_putIndexOnHash(U32 idx, U32 h, void* tableBase, tableType_t const tableType)
-{
- switch (tableType)
- {
- default: /* fallthrough */
- case clearedTable: /* fallthrough */
- case byPtr: { /* illegal! */ assert(0); return; }
- case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = idx; return; }
- case byU16: { U16* hashTable = (U16*) tableBase; assert(idx < 65536); hashTable[h] = (U16)idx; return; }
- }
-}
-
-static void LZ4_putPositionOnHash(const BYTE* p, U32 h,
- void* tableBase, tableType_t const tableType,
- const BYTE* srcBase)
-{
- switch (tableType)
- {
- case clearedTable: { /* illegal! */ assert(0); return; }
- case byPtr: { const BYTE** hashTable = (const BYTE**)tableBase; hashTable[h] = p; return; }
- case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = (U32)(p-srcBase); return; }
- case byU16: { U16* hashTable = (U16*) tableBase; hashTable[h] = (U16)(p-srcBase); return; }
- }
-}
-
-LZ4_FORCE_INLINE void LZ4_putPosition(const BYTE* p, void* tableBase, tableType_t tableType, const BYTE* srcBase)
-{
- U32 const h = LZ4_hashPosition(p, tableType);
- LZ4_putPositionOnHash(p, h, tableBase, tableType, srcBase);
-}
-
-/* LZ4_getIndexOnHash() :
- * Index of match position registered in hash table.
- * hash position must be calculated by using base+index, or dictBase+index.
- * Assumption 1 : only valid if tableType == byU32 or byU16.
- * Assumption 2 : h is presumed valid (within limits of hash table)
- */
-static U32 LZ4_getIndexOnHash(U32 h, const void* tableBase, tableType_t tableType)
-{
- LZ4_STATIC_ASSERT(LZ4_MEMORY_USAGE > 2);
- if (tableType == byU32) {
- const U32* const hashTable = (const U32*) tableBase;
- assert(h < (1U << (LZ4_MEMORY_USAGE-2)));
- return hashTable[h];
- }
- if (tableType == byU16) {
- const U16* const hashTable = (const U16*) tableBase;
- assert(h < (1U << (LZ4_MEMORY_USAGE-1)));
- return hashTable[h];
- }
- assert(0); return 0; /* forbidden case */
-}
-
-static const BYTE* LZ4_getPositionOnHash(U32 h, const void* tableBase, tableType_t tableType, const BYTE* srcBase)
-{
- if (tableType == byPtr) { const BYTE* const* hashTable = (const BYTE* const*) tableBase; return hashTable[h]; }
- if (tableType == byU32) { const U32* const hashTable = (const U32*) tableBase; return hashTable[h] + srcBase; }
- { const U16* const hashTable = (const U16*) tableBase; return hashTable[h] + srcBase; } /* default, to ensure a return */
-}
-
-LZ4_FORCE_INLINE const BYTE*
-LZ4_getPosition(const BYTE* p,
- const void* tableBase, tableType_t tableType,
- const BYTE* srcBase)
-{
- U32 const h = LZ4_hashPosition(p, tableType);
- return LZ4_getPositionOnHash(h, tableBase, tableType, srcBase);
-}
-
-LZ4_FORCE_INLINE void
-LZ4_prepareTable(LZ4_stream_t_internal* const cctx,
- const int inputSize,
- const tableType_t tableType) {
- /* If compression failed during the previous step, then the context
- * is marked as dirty, therefore, it has to be fully reset.
- */
- if (cctx->dirty) {
- DEBUGLOG(5, "LZ4_prepareTable: Full reset for %p", cctx);
- MEM_INIT(cctx, 0, sizeof(LZ4_stream_t_internal));
- return;
- }
-
- /* If the table hasn't been used, it's guaranteed to be zeroed out, and is
- * therefore safe to use no matter what mode we're in. Otherwise, we figure
- * out if it's safe to leave as is or whether it needs to be reset.
- */
- if (cctx->tableType != clearedTable) {
- assert(inputSize >= 0);
- if (cctx->tableType != tableType
- || ((tableType == byU16) && cctx->currentOffset + (unsigned)inputSize >= 0xFFFFU)
- || ((tableType == byU32) && cctx->currentOffset > 1 GB)
- || tableType == byPtr
- || inputSize >= 4 KB)
- {
- DEBUGLOG(4, "LZ4_prepareTable: Resetting table in %p", cctx);
- MEM_INIT(cctx->hashTable, 0, LZ4_HASHTABLESIZE);
- cctx->currentOffset = 0;
- cctx->tableType = clearedTable;
- } else {
- DEBUGLOG(4, "LZ4_prepareTable: Re-use hash table (no reset)");
- }
- }
-
- /* Adding a gap, so all previous entries are > LZ4_DISTANCE_MAX back, is faster
- * than compressing without a gap. However, compressing with
- * currentOffset == 0 is faster still, so we preserve that case.
- */
- if (cctx->currentOffset != 0 && tableType == byU32) {
- DEBUGLOG(5, "LZ4_prepareTable: adding 64KB to currentOffset");
- cctx->currentOffset += 64 KB;
- }
-
- /* Finally, clear history */
- cctx->dictCtx = NULL;
- cctx->dictionary = NULL;
- cctx->dictSize = 0;
-}
-
-/** LZ4_compress_generic() :
- inlined, to ensure branches are decided at compilation time */
-LZ4_FORCE_INLINE int LZ4_compress_generic(
- LZ4_stream_t_internal* const cctx,
- const char* const source,
- char* const dest,
- const int inputSize,
- int *inputConsumed, /* only written when outputDirective == fillOutput */
- const int maxOutputSize,
- const limitedOutput_directive outputDirective,
- const tableType_t tableType,
- const dict_directive dictDirective,
- const dictIssue_directive dictIssue,
- const int acceleration)
-{
- int result;
- const BYTE* ip = (const BYTE*) source;
-
- U32 const startIndex = cctx->currentOffset;
- const BYTE* base = (const BYTE*) source - startIndex;
- const BYTE* lowLimit;
-
- const LZ4_stream_t_internal* dictCtx = (const LZ4_stream_t_internal*) cctx->dictCtx;
- const BYTE* const dictionary =
- dictDirective == usingDictCtx ? dictCtx->dictionary : cctx->dictionary;
- const U32 dictSize =
- dictDirective == usingDictCtx ? dictCtx->dictSize : cctx->dictSize;
- const U32 dictDelta = (dictDirective == usingDictCtx) ? startIndex - dictCtx->currentOffset : 0; /* make indexes in dictCtx comparable with index in current context */
-
- int const maybe_extMem = (dictDirective == usingExtDict) || (dictDirective == usingDictCtx);
- U32 const prefixIdxLimit = startIndex - dictSize; /* used when dictDirective == dictSmall */
- const BYTE* const dictEnd = dictionary + dictSize;
- const BYTE* anchor = (const BYTE*) source;
- const BYTE* const iend = ip + inputSize;
- const BYTE* const mflimitPlusOne = iend - MFLIMIT + 1;
- const BYTE* const matchlimit = iend - LASTLITERALS;
-
- /* the dictCtx currentOffset is indexed on the start of the dictionary,
- * while a dictionary in the current context precedes the currentOffset */
- const BYTE* dictBase = (dictDirective == usingDictCtx) ?
- dictionary + dictSize - dictCtx->currentOffset :
- dictionary + dictSize - startIndex;
-
- BYTE* op = (BYTE*) dest;
- BYTE* const olimit = op + maxOutputSize;
-
- U32 offset = 0;
- U32 forwardH;
-
- DEBUGLOG(5, "LZ4_compress_generic: srcSize=%i, tableType=%u", inputSize, tableType);
- /* If init conditions are not met, we don't have to mark stream
- * as having dirty context, since no action was taken yet */
- if (outputDirective == fillOutput && maxOutputSize < 1) { return 0; } /* Impossible to store anything */
- if ((U32)inputSize > (U32)LZ4_MAX_INPUT_SIZE) { return 0; } /* Unsupported inputSize, too large (or negative) */
- if ((tableType == byU16) && (inputSize>=LZ4_64Klimit)) { return 0; } /* Size too large (not within 64K limit) */
- if (tableType==byPtr) assert(dictDirective==noDict); /* only supported use case with byPtr */
- assert(acceleration >= 1);
-
- lowLimit = (const BYTE*)source - (dictDirective == withPrefix64k ? dictSize : 0);
-
- /* Update context state */
- if (dictDirective == usingDictCtx) {
- /* Subsequent linked blocks can't use the dictionary. */
- /* Instead, they use the block we just compressed. */
- cctx->dictCtx = NULL;
- cctx->dictSize = (U32)inputSize;
- } else {
- cctx->dictSize += (U32)inputSize;
- }
- cctx->currentOffset += (U32)inputSize;
- cctx->tableType = (U16)tableType;
-
- if (inputSize<LZ4_minLength) goto _last_literals; /* Input too small, no compression (all literals) */
-
- /* First Byte */
- LZ4_putPosition(ip, cctx->hashTable, tableType, base);
- ip++; forwardH = LZ4_hashPosition(ip, tableType);
-
- /* Main Loop */
- for ( ; ; ) {
- const BYTE* match;
- BYTE* token;
- const BYTE* filledIp;
-
- /* Find a match */
- if (tableType == byPtr) {
- const BYTE* forwardIp = ip;
- int step = 1;
- int searchMatchNb = acceleration << LZ4_skipTrigger;
- do {
- U32 const h = forwardH;
- ip = forwardIp;
- forwardIp += step;
- step = (searchMatchNb++ >> LZ4_skipTrigger);
-
- if (unlikely(forwardIp > mflimitPlusOne)) goto _last_literals;
- assert(ip < mflimitPlusOne);
-
- match = LZ4_getPositionOnHash(h, cctx->hashTable, tableType, base);
- forwardH = LZ4_hashPosition(forwardIp, tableType);
- LZ4_putPositionOnHash(ip, h, cctx->hashTable, tableType, base);
-
- } while ( (match+LZ4_DISTANCE_MAX < ip)
- || (LZ4_read32(match) != LZ4_read32(ip)) );
-
- } else { /* byU32, byU16 */
-
- const BYTE* forwardIp = ip;
- int step = 1;
- int searchMatchNb = acceleration << LZ4_skipTrigger;
- do {
- U32 const h = forwardH;
- U32 const current = (U32)(forwardIp - base);
- U32 matchIndex = LZ4_getIndexOnHash(h, cctx->hashTable, tableType);
- assert(matchIndex <= current);
- assert(forwardIp - base < (ptrdiff_t)(2 GB - 1));
- ip = forwardIp;
- forwardIp += step;
- step = (searchMatchNb++ >> LZ4_skipTrigger);
-
- if (unlikely(forwardIp > mflimitPlusOne)) goto _last_literals;
- assert(ip < mflimitPlusOne);
-
- if (dictDirective == usingDictCtx) {
- if (matchIndex < startIndex) {
- /* there was no match, try the dictionary */
- assert(tableType == byU32);
- matchIndex = LZ4_getIndexOnHash(h, dictCtx->hashTable, byU32);
- match = dictBase + matchIndex;
- matchIndex += dictDelta; /* make dictCtx index comparable with current context */
- lowLimit = dictionary;
- } else {
- match = base + matchIndex;
- lowLimit = (const BYTE*)source;
- }
- } else if (dictDirective==usingExtDict) {
- if (matchIndex < startIndex) {
- DEBUGLOG(7, "extDict candidate: matchIndex=%5u < startIndex=%5u", matchIndex, startIndex);
- assert(startIndex - matchIndex >= MINMATCH);
- match = dictBase + matchIndex;
- lowLimit = dictionary;
- } else {
- match = base + matchIndex;
- lowLimit = (const BYTE*)source;
- }
- } else { /* single continuous memory segment */
- match = base + matchIndex;
- }
- forwardH = LZ4_hashPosition(forwardIp, tableType);
- LZ4_putIndexOnHash(current, h, cctx->hashTable, tableType);
-
- DEBUGLOG(7, "candidate at pos=%u (offset=%u \n", matchIndex, current - matchIndex);
- if ((dictIssue == dictSmall) && (matchIndex < prefixIdxLimit)) { continue; } /* match outside of valid area */
- assert(matchIndex < current);
- if ( ((tableType != byU16) || (LZ4_DISTANCE_MAX < LZ4_DISTANCE_ABSOLUTE_MAX))
- && (matchIndex+LZ4_DISTANCE_MAX < current)) {
- continue;
- } /* too far */
- assert((current - matchIndex) <= LZ4_DISTANCE_MAX); /* match now expected within distance */
-
- if (LZ4_read32(match) == LZ4_read32(ip)) {
- if (maybe_extMem) offset = current - matchIndex;
- break; /* match found */
- }
-
- } while(1);
- }
-
- /* Catch up */
- filledIp = ip;
- while (((ip>anchor) & (match > lowLimit)) && (unlikely(ip[-1]==match[-1]))) { ip--; match--; }
-
- /* Encode Literals */
- { unsigned const litLength = (unsigned)(ip - anchor);
- token = op++;
- if ((outputDirective == limitedOutput) && /* Check output buffer overflow */
- (unlikely(op + litLength + (2 + 1 + LASTLITERALS) + (litLength/255) > olimit)) ) {
- return 0; /* cannot compress within `dst` budget. Stored indexes in hash table are nonetheless fine */
- }
- if ((outputDirective == fillOutput) &&
- (unlikely(op + (litLength+240)/255 /* litlen */ + litLength /* literals */ + 2 /* offset */ + 1 /* token */ + MFLIMIT - MINMATCH /* min last literals so last match is <= end - MFLIMIT */ > olimit))) {
- op--;
- goto _last_literals;
- }
- if (litLength >= RUN_MASK) {
- int len = (int)(litLength - RUN_MASK);
- *token = (RUN_MASK<<ML_BITS);
- for(; len >= 255 ; len-=255) *op++ = 255;
- *op++ = (BYTE)len;
- }
- else *token = (BYTE)(litLength<<ML_BITS);
-
- /* Copy Literals */
- LZ4_wildCopy8(op, anchor, op+litLength);
- op+=litLength;
- DEBUGLOG(6, "seq.start:%i, literals=%u, match.start:%i",
- (int)(anchor-(const BYTE*)source), litLength, (int)(ip-(const BYTE*)source));
- }
-
-_next_match:
- /* at this stage, the following variables must be correctly set :
- * - ip : at start of LZ operation
- * - match : at start of previous pattern occurence; can be within current prefix, or within extDict
- * - offset : if maybe_ext_memSegment==1 (constant)
- * - lowLimit : must be == dictionary to mean "match is within extDict"; must be == source otherwise
- * - token and *token : position to write 4-bits for match length; higher 4-bits for literal length supposed already written
- */
-
- if ((outputDirective == fillOutput) &&
- (op + 2 /* offset */ + 1 /* token */ + MFLIMIT - MINMATCH /* min last literals so last match is <= end - MFLIMIT */ > olimit)) {
- /* the match was too close to the end, rewind and go to last literals */
- op = token;
- goto _last_literals;
- }
-
- /* Encode Offset */
- if (maybe_extMem) { /* static test */
- DEBUGLOG(6, " with offset=%u (ext if > %i)", offset, (int)(ip - (const BYTE*)source));
- assert(offset <= LZ4_DISTANCE_MAX && offset > 0);
- LZ4_writeLE16(op, (U16)offset); op+=2;
- } else {
- DEBUGLOG(6, " with offset=%u (same segment)", (U32)(ip - match));
- assert(ip-match <= LZ4_DISTANCE_MAX);
- LZ4_writeLE16(op, (U16)(ip - match)); op+=2;
- }
-
- /* Encode MatchLength */
- { unsigned matchCode;
-
- if ( (dictDirective==usingExtDict || dictDirective==usingDictCtx)
- && (lowLimit==dictionary) /* match within extDict */ ) {
- const BYTE* limit = ip + (dictEnd-match);
- assert(dictEnd > match);
- if (limit > matchlimit) limit = matchlimit;
- matchCode = LZ4_count(ip+MINMATCH, match+MINMATCH, limit);
- ip += (size_t)matchCode + MINMATCH;
- if (ip==limit) {
- unsigned const more = LZ4_count(limit, (const BYTE*)source, matchlimit);
- matchCode += more;
- ip += more;
- }
- DEBUGLOG(6, " with matchLength=%u starting in extDict", matchCode+MINMATCH);
- } else {
- matchCode = LZ4_count(ip+MINMATCH, match+MINMATCH, matchlimit);
- ip += (size_t)matchCode + MINMATCH;
- DEBUGLOG(6, " with matchLength=%u", matchCode+MINMATCH);
- }
-
- if ((outputDirective) && /* Check output buffer overflow */
- (unlikely(op + (1 + LASTLITERALS) + (matchCode+240)/255 > olimit)) ) {
- if (outputDirective == fillOutput) {
- /* Match description too long : reduce it */
- U32 newMatchCode = 15 /* in token */ - 1 /* to avoid needing a zero byte */ + ((U32)(olimit - op) - 1 - LASTLITERALS) * 255;
- ip -= matchCode - newMatchCode;
- assert(newMatchCode < matchCode);
- matchCode = newMatchCode;
- if (unlikely(ip <= filledIp)) {
- /* We have already filled up to filledIp so if ip ends up less than filledIp
- * we have positions in the hash table beyond the current position. This is
- * a problem if we reuse the hash table. So we have to remove these positions
- * from the hash table.
- */
- const BYTE* ptr;
- DEBUGLOG(5, "Clearing %u positions", (U32)(filledIp - ip));
- for (ptr = ip; ptr <= filledIp; ++ptr) {
- U32 const h = LZ4_hashPosition(ptr, tableType);
- LZ4_clearHash(h, cctx->hashTable, tableType);
- }
- }
- } else {
- assert(outputDirective == limitedOutput);
- return 0; /* cannot compress within `dst` budget. Stored indexes in hash table are nonetheless fine */
- }
- }
- if (matchCode >= ML_MASK) {
- *token += ML_MASK;
- matchCode -= ML_MASK;
- LZ4_write32(op, 0xFFFFFFFF);
- while (matchCode >= 4*255) {
- op+=4;
- LZ4_write32(op, 0xFFFFFFFF);
- matchCode -= 4*255;
- }
- op += matchCode / 255;
- *op++ = (BYTE)(matchCode % 255);
- } else
- *token += (BYTE)(matchCode);
- }
- /* Ensure we have enough space for the last literals. */
- assert(!(outputDirective == fillOutput && op + 1 + LASTLITERALS > olimit));
-
- anchor = ip;
-
- /* Test end of chunk */
- if (ip >= mflimitPlusOne) break;
-
- /* Fill table */
- LZ4_putPosition(ip-2, cctx->hashTable, tableType, base);
-
- /* Test next position */
- if (tableType == byPtr) {
-
- match = LZ4_getPosition(ip, cctx->hashTable, tableType, base);
- LZ4_putPosition(ip, cctx->hashTable, tableType, base);
- if ( (match+LZ4_DISTANCE_MAX >= ip)
- && (LZ4_read32(match) == LZ4_read32(ip)) )
- { token=op++; *token=0; goto _next_match; }
-
- } else { /* byU32, byU16 */
-
- U32 const h = LZ4_hashPosition(ip, tableType);
- U32 const current = (U32)(ip-base);
- U32 matchIndex = LZ4_getIndexOnHash(h, cctx->hashTable, tableType);
- assert(matchIndex < current);
- if (dictDirective == usingDictCtx) {
- if (matchIndex < startIndex) {
- /* there was no match, try the dictionary */
- matchIndex = LZ4_getIndexOnHash(h, dictCtx->hashTable, byU32);
- match = dictBase + matchIndex;
- lowLimit = dictionary; /* required for match length counter */
- matchIndex += dictDelta;
- } else {
- match = base + matchIndex;
- lowLimit = (const BYTE*)source; /* required for match length counter */
- }
- } else if (dictDirective==usingExtDict) {
- if (matchIndex < startIndex) {
- match = dictBase + matchIndex;
- lowLimit = dictionary; /* required for match length counter */
- } else {
- match = base + matchIndex;
- lowLimit = (const BYTE*)source; /* required for match length counter */
- }
- } else { /* single memory segment */
- match = base + matchIndex;
- }
- LZ4_putIndexOnHash(current, h, cctx->hashTable, tableType);
- assert(matchIndex < current);
- if ( ((dictIssue==dictSmall) ? (matchIndex >= prefixIdxLimit) : 1)
- && (((tableType==byU16) && (LZ4_DISTANCE_MAX == LZ4_DISTANCE_ABSOLUTE_MAX)) ? 1 : (matchIndex+LZ4_DISTANCE_MAX >= current))
- && (LZ4_read32(match) == LZ4_read32(ip)) ) {
- token=op++;
- *token=0;
- if (maybe_extMem) offset = current - matchIndex;
- DEBUGLOG(6, "seq.start:%i, literals=%u, match.start:%i",
- (int)(anchor-(const BYTE*)source), 0, (int)(ip-(const BYTE*)source));
- goto _next_match;
- }
- }
-
- /* Prepare next loop */
- forwardH = LZ4_hashPosition(++ip, tableType);
-
- }
-
-_last_literals:
- /* Encode Last Literals */
- { size_t lastRun = (size_t)(iend - anchor);
- if ( (outputDirective) && /* Check output buffer overflow */
- (op + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > olimit)) {
- if (outputDirective == fillOutput) {
- /* adapt lastRun to fill 'dst' */
- assert(olimit >= op);
- lastRun = (size_t)(olimit-op) - 1;
- lastRun -= (lastRun+240)/255;
- } else {
- assert(outputDirective == limitedOutput);
- return 0; /* cannot compress within `dst` budget. Stored indexes in hash table are nonetheless fine */
- }
- }
- if (lastRun >= RUN_MASK) {
- size_t accumulator = lastRun - RUN_MASK;
- *op++ = RUN_MASK << ML_BITS;
- for(; accumulator >= 255 ; accumulator-=255) *op++ = 255;
- *op++ = (BYTE) accumulator;
- } else {
- *op++ = (BYTE)(lastRun<<ML_BITS);
- }
- memcpy(op, anchor, lastRun);
- ip = anchor + lastRun;
- op += lastRun;
- }
-
- if (outputDirective == fillOutput) {
- *inputConsumed = (int) (((const char*)ip)-source);
- }
- DEBUGLOG(5, "LZ4_compress_generic: compressed %i bytes into %i bytes", inputSize, (int)(((char*)op) - dest));
- result = (int)(((char*)op) - dest);
- assert(result > 0);
- return result;
-}
-
-
-int LZ4_compress_fast_extState(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
-{
- LZ4_stream_t_internal* const ctx = & LZ4_initStream(state, sizeof(LZ4_stream_t)) -> internal_donotuse;
- assert(ctx != NULL);
- if (acceleration < 1) acceleration = ACCELERATION_DEFAULT;
- if (maxOutputSize >= LZ4_compressBound(inputSize)) {
- if (inputSize < LZ4_64Klimit) {
- return LZ4_compress_generic(ctx, source, dest, inputSize, NULL, 0, notLimited, byU16, noDict, noDictIssue, acceleration);
- } else {
- const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)source > LZ4_DISTANCE_MAX)) ? byPtr : byU32;
- return LZ4_compress_generic(ctx, source, dest, inputSize, NULL, 0, notLimited, tableType, noDict, noDictIssue, acceleration);
- }
- } else {
- if (inputSize < LZ4_64Klimit) {
- return LZ4_compress_generic(ctx, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, byU16, noDict, noDictIssue, acceleration);
- } else {
- const tableType_t tableType = ((sizeof(void*)==4) && ((uptrval)source > LZ4_DISTANCE_MAX)) ? byPtr : byU32;
- return LZ4_compress_generic(ctx, source, dest, inputSize, NULL, maxOutputSize, limitedOutput, tableType, noDict, noDictIssue, acceleration);
- }
- }
-}
-
-static int LZ4_compress_fast(const char* source, char* dest, int inputSize, int maxOutputSize, int acceleration)
-{
- int result;
-#if (LZ4_HEAPMODE)
- LZ4_stream_t* ctxPtr = ALLOC(sizeof(LZ4_stream_t)); /* malloc-calloc always properly aligned */
- if (ctxPtr == NULL) return 0;
-#else
- LZ4_stream_t ctx;
- LZ4_stream_t* const ctxPtr = &ctx;
-#endif
- result = LZ4_compress_fast_extState(ctxPtr, source, dest, inputSize, maxOutputSize, acceleration);
-
-#if (LZ4_HEAPMODE)
- FREEMEM(ctxPtr);
-#endif
- return result;
-}
-
-
-int LZ4_compress_default(const char* src, char* dst, int srcSize, int maxOutputSize)
-{
- return LZ4_compress_fast(src, dst, srcSize, maxOutputSize, 1);
-}
-
-/*-******************************
-* Streaming functions
-********************************/
-
-#ifndef _MSC_VER /* for some reason, Visual fails the aligment test on 32-bit x86 :
- it reports an aligment of 8-bytes,
- while actually aligning LZ4_stream_t on 4 bytes. */
-static size_t LZ4_stream_t_alignment(void)
-{
- struct { char c; LZ4_stream_t t; } t_a;
- return sizeof(t_a) - sizeof(t_a.t);
-}
-#endif
-
-LZ4_stream_t* LZ4_initStream (void* buffer, size_t size)
-{
- DEBUGLOG(5, "LZ4_initStream");
- if (buffer == NULL) { return NULL; }
- if (size < sizeof(LZ4_stream_t)) { return NULL; }
-#ifndef _MSC_VER /* for some reason, Visual fails the aligment test on 32-bit x86 :
- it reports an aligment of 8-bytes,
- while actually aligning LZ4_stream_t on 4 bytes. */
- if (((size_t)buffer) & (LZ4_stream_t_alignment() - 1)) { return NULL; } /* alignment check */
-#endif
- MEM_INIT(buffer, 0, sizeof(LZ4_stream_t));
- return (LZ4_stream_t*)buffer;
-}
-
-/*-*******************************
- * Decompression functions
- ********************************/
-
-typedef enum { endOnOutputSize = 0, endOnInputSize = 1 } endCondition_directive;
-typedef enum { decode_full_block = 0, partial_decode = 1 } earlyEnd_directive;
-
-#undef MIN
-#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
-
-/* Read the variable-length literal or match length.
- *
- * ip - pointer to use as input.
- * lencheck - end ip. Return an error if ip advances >= lencheck.
- * loop_check - check ip >= lencheck in body of loop. Returns loop_error if so.
- * initial_check - check ip >= lencheck before start of loop. Returns initial_error if so.
- * error (output) - error code. Should be set to 0 before call.
- */
-typedef enum { loop_error = -2, initial_error = -1, ok = 0 } variable_length_error;
-LZ4_FORCE_INLINE unsigned
-read_variable_length(const BYTE**ip, const BYTE* lencheck, int loop_check, int initial_check, variable_length_error* error)
-{
- unsigned length = 0;
- unsigned s;
- if (initial_check && unlikely((*ip) >= lencheck)) { /* overflow detection */
- *error = initial_error;
- return length;
- }
- do {
- s = **ip;
- (*ip)++;
- length += s;
- if (loop_check && unlikely((*ip) >= lencheck)) { /* overflow detection */
- *error = loop_error;
- return length;
- }
- } while (s==255);
-
- return length;
-}
-
-/*! LZ4_decompress_generic() :
- * This generic decompression function covers all use cases.
- * It shall be instantiated several times, using different sets of directives.
- * Note that it is important for performance that this function really get inlined,
- * in order to remove useless branches during compilation optimization.
- */
-LZ4_FORCE_INLINE int
-LZ4_decompress_generic(
- const char* const src,
- char* const dst,
- int srcSize,
- int outputSize, /* If endOnInput==endOnInputSize, this value is `dstCapacity` */
-
- endCondition_directive endOnInput, /* endOnOutputSize, endOnInputSize */
- earlyEnd_directive partialDecoding, /* full, partial */
- dict_directive dict, /* noDict, withPrefix64k, usingExtDict */
- const BYTE* const lowPrefix, /* always <= dst, == dst when no prefix */
- const BYTE* const dictStart, /* only if dict==usingExtDict */
- const size_t dictSize /* note : = 0 if noDict */
- )
-{
- if (src == NULL) { return -1; }
-
- { const BYTE* ip = (const BYTE*) src;
- const BYTE* const iend = ip + srcSize;
-
- BYTE* op = (BYTE*) dst;
- BYTE* const oend = op + outputSize;
- BYTE* cpy;
-
- const BYTE* const dictEnd = (dictStart == NULL) ? NULL : dictStart + dictSize;
-
- const int safeDecode = (endOnInput==endOnInputSize);
- const int checkOffset = ((safeDecode) && (dictSize < (int)(64 KB)));
-
-
- /* Set up the "end" pointers for the shortcut. */
- const BYTE* const shortiend = iend - (endOnInput ? 14 : 8) /*maxLL*/ - 2 /*offset*/;
- const BYTE* const shortoend = oend - (endOnInput ? 14 : 8) /*maxLL*/ - 18 /*maxML*/;
-
- const BYTE* match;
- size_t offset;
- unsigned token;
- size_t length;
-
-
- DEBUGLOG(5, "LZ4_decompress_generic (srcSize:%i, dstSize:%i)", srcSize, outputSize);
-
- /* Special cases */
- assert(lowPrefix <= op);
- if ((endOnInput) && (unlikely(outputSize==0))) {
- /* Empty output buffer */
- if (partialDecoding) return 0;
- return ((srcSize==1) && (*ip==0)) ? 0 : -1;
- }
- if ((!endOnInput) && (unlikely(outputSize==0))) { return (*ip==0 ? 1 : -1); }
- if ((endOnInput) && unlikely(srcSize==0)) { return -1; }
-
- /* Currently the fast loop shows a regression on qualcomm arm chips. */
-#if LZ4_FAST_DEC_LOOP
- if ((oend - op) < FASTLOOP_SAFE_DISTANCE) {
- DEBUGLOG(6, "skip fast decode loop");
- goto safe_decode;
- }
-
- /* Fast loop : decode sequences as long as output < iend-FASTLOOP_SAFE_DISTANCE */
- while (1) {
- /* Main fastloop assertion: We can always wildcopy FASTLOOP_SAFE_DISTANCE */
- assert(oend - op >= FASTLOOP_SAFE_DISTANCE);
- if (endOnInput) { assert(ip < iend); }
- token = *ip++;
- length = token >> ML_BITS; /* literal length */
-
- assert(!endOnInput || ip <= iend); /* ip < iend before the increment */
-
- /* decode literal length */
- if (length == RUN_MASK) {
- variable_length_error error = ok;
- length += read_variable_length(&ip, iend-RUN_MASK, endOnInput, endOnInput, &error);
- if (error == initial_error) { goto _output_error; }
- if ((safeDecode) && unlikely((uptrval)(op)+length<(uptrval)(op))) { goto _output_error; } /* overflow detection */
- if ((safeDecode) && unlikely((uptrval)(ip)+length<(uptrval)(ip))) { goto _output_error; } /* overflow detection */
-
- /* copy literals */
- cpy = op+length;
- LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
- if (endOnInput) { /* LZ4_decompress_safe() */
- if ((cpy>oend-32) || (ip+length>iend-32)) { goto safe_literal_copy; }
- LZ4_wildCopy32(op, ip, cpy);
- } else { /* LZ4_decompress_fast() */
- if (cpy>oend-8) { goto safe_literal_copy; }
- LZ4_wildCopy8(op, ip, cpy); /* LZ4_decompress_fast() cannot copy more than 8 bytes at a time :
- * it doesn't know input length, and only relies on end-of-block properties */
- }
- ip += length; op = cpy;
- } else {
- cpy = op+length;
- if (endOnInput) { /* LZ4_decompress_safe() */
- DEBUGLOG(7, "copy %u bytes in a 16-bytes stripe", (unsigned)length);
- /* We don't need to check oend, since we check it once for each loop below */
- if (ip > iend-(16 + 1/*max lit + offset + nextToken*/)) { goto safe_literal_copy; }
- /* Literals can only be 14, but hope compilers optimize if we copy by a register size */
- memcpy(op, ip, 16);
- } else { /* LZ4_decompress_fast() */
- /* LZ4_decompress_fast() cannot copy more than 8 bytes at a time :
- * it doesn't know input length, and relies on end-of-block properties */
- memcpy(op, ip, 8);
- if (length > 8) { memcpy(op+8, ip+8, 8); }
- }
- ip += length; op = cpy;
- }
-
- /* get offset */
- offset = LZ4_readLE16(ip); ip+=2;
- match = op - offset;
- assert(match <= op);
-
- /* get matchlength */
- length = token & ML_MASK;
-
- if (length == ML_MASK) {
- variable_length_error error = ok;
- if ((checkOffset) && (unlikely(match + dictSize < lowPrefix))) { goto _output_error; } /* Error : offset outside buffers */
- length += read_variable_length(&ip, iend - LASTLITERALS + 1, endOnInput, 0, &error);
- if (error != ok) { goto _output_error; }
- if ((safeDecode) && unlikely((uptrval)(op)+length<(uptrval)op)) { goto _output_error; } /* overflow detection */
- length += MINMATCH;
- if (op + length >= oend - FASTLOOP_SAFE_DISTANCE) {
- goto safe_match_copy;
- }
- } else {
- length += MINMATCH;
- if (op + length >= oend - FASTLOOP_SAFE_DISTANCE) {
- goto safe_match_copy;
- }
-
- /* Fastpath check: Avoids a branch in LZ4_wildCopy32 if true */
- if ((dict == withPrefix64k) || (match >= lowPrefix)) {
- if (offset >= 8) {
- assert(match >= lowPrefix);
- assert(match <= op);
- assert(op + 18 <= oend);
-
- memcpy(op, match, 8);
- memcpy(op+8, match+8, 8);
- memcpy(op+16, match+16, 2);
- op += length;
- continue;
- } } }
-
- if ((checkOffset) && (unlikely(match + dictSize < lowPrefix))) { goto _output_error; } /* Error : offset outside buffers */
- /* match starting within external dictionary */
- if ((dict==usingExtDict) && (match < lowPrefix)) {
- if (unlikely(op+length > oend-LASTLITERALS)) {
- if (partialDecoding) {
- length = MIN(length, (size_t)(oend-op)); /* reach end of buffer */
- } else {
- goto _output_error; /* end-of-block condition violated */
- } }
-
- if (length <= (size_t)(lowPrefix-match)) {
- /* match fits entirely within external dictionary : just copy */
- memmove(op, dictEnd - (lowPrefix-match), length);
- op += length;
- } else {
- /* match stretches into both external dictionary and current block */
- size_t const copySize = (size_t)(lowPrefix - match);
- size_t const restSize = length - copySize;
- memcpy(op, dictEnd - copySize, copySize);
- op += copySize;
- if (restSize > (size_t)(op - lowPrefix)) { /* overlap copy */
- BYTE* const endOfMatch = op + restSize;
- const BYTE* copyFrom = lowPrefix;
- while (op < endOfMatch) { *op++ = *copyFrom++; }
- } else {
- memcpy(op, lowPrefix, restSize);
- op += restSize;
- } }
- continue;
- }
-
- /* copy match within block */
- cpy = op + length;
-
- assert((op <= oend) && (oend-op >= 32));
- if (unlikely(offset<16)) {
- LZ4_memcpy_using_offset(op, match, cpy, offset);
- } else {
- LZ4_wildCopy32(op, match, cpy);
- }
-
- op = cpy; /* wildcopy correction */
- }
- safe_decode:
-#endif
-
- /* Main Loop : decode remaining sequences where output < FASTLOOP_SAFE_DISTANCE */
- while (1) {
- token = *ip++;
- length = token >> ML_BITS; /* literal length */
-
- assert(!endOnInput || ip <= iend); /* ip < iend before the increment */
-
- /* A two-stage shortcut for the most common case:
- * 1) If the literal length is 0..14, and there is enough space,
- * enter the shortcut and copy 16 bytes on behalf of the literals
- * (in the fast mode, only 8 bytes can be safely copied this way).
- * 2) Further if the match length is 4..18, copy 18 bytes in a similar
- * manner; but we ensure that there's enough space in the output for
- * those 18 bytes earlier, upon entering the shortcut (in other words,
- * there is a combined check for both stages).
- */
- if ( (endOnInput ? length != RUN_MASK : length <= 8)
- /* strictly "less than" on input, to re-enter the loop with at least one byte */
- && likely((endOnInput ? ip < shortiend : 1) & (op <= shortoend)) ) {
- /* Copy the literals */
- memcpy(op, ip, endOnInput ? 16 : 8);
- op += length; ip += length;
-
- /* The second stage: prepare for match copying, decode full info.
- * If it doesn't work out, the info won't be wasted. */
- length = token & ML_MASK; /* match length */
- offset = LZ4_readLE16(ip); ip += 2;
- match = op - offset;
- assert(match <= op); /* check overflow */
-
- /* Do not deal with overlapping matches. */
- if ( (length != ML_MASK)
- && (offset >= 8)
- && (dict==withPrefix64k || match >= lowPrefix) ) {
- /* Copy the match. */
- memcpy(op + 0, match + 0, 8);
- memcpy(op + 8, match + 8, 8);
- memcpy(op +16, match +16, 2);
- op += length + MINMATCH;
- /* Both stages worked, load the next token. */
- continue;
- }
-
- /* The second stage didn't work out, but the info is ready.
- * Propel it right to the point of match copying. */
- goto _copy_match;
- }
-
- /* decode literal length */
- if (length == RUN_MASK) {
- variable_length_error error = ok;
- length += read_variable_length(&ip, iend-RUN_MASK, endOnInput, endOnInput, &error);
- if (error == initial_error) { goto _output_error; }
- if ((safeDecode) && unlikely((uptrval)(op)+length<(uptrval)(op))) { goto _output_error; } /* overflow detection */
- if ((safeDecode) && unlikely((uptrval)(ip)+length<(uptrval)(ip))) { goto _output_error; } /* overflow detection */
- }
-
- /* copy literals */
- cpy = op+length;
-#if LZ4_FAST_DEC_LOOP
- safe_literal_copy:
-#endif
- LZ4_STATIC_ASSERT(MFLIMIT >= WILDCOPYLENGTH);
- if ( ((endOnInput) && ((cpy>oend-MFLIMIT) || (ip+length>iend-(2+1+LASTLITERALS))) )
- || ((!endOnInput) && (cpy>oend-WILDCOPYLENGTH)) )
- {
- /* We've either hit the input parsing restriction or the output parsing restriction.
- * If we've hit the input parsing condition then this must be the last sequence.
- * If we've hit the output parsing condition then we are either using partialDecoding
- * or we've hit the output parsing condition.
- */
- if (partialDecoding) {
- /* Since we are partial decoding we may be in this block because of the output parsing
- * restriction, which is not valid since the output buffer is allowed to be undersized.
- */
- assert(endOnInput);
- /* If we're in this block because of the input parsing condition, then we must be on the
- * last sequence (or invalid), so we must check that we exactly consume the input.
- */
- if ((ip+length>iend-(2+1+LASTLITERALS)) && (ip+length != iend)) { goto _output_error; }
- assert(ip+length <= iend);
- /* We are finishing in the middle of a literals segment.
- * Break after the copy.
- */
- if (cpy > oend) {
- cpy = oend;
- assert(op<=oend);
- length = (size_t)(oend-op);
- }
- assert(ip+length <= iend);
- } else {
- /* We must be on the last sequence because of the parsing limitations so check
- * that we exactly regenerate the original size (must be exact when !endOnInput).
- */
- if ((!endOnInput) && (cpy != oend)) { goto _output_error; }
- /* We must be on the last sequence (or invalid) because of the parsing limitations
- * so check that we exactly consume the input and don't overrun the output buffer.
- */
- if ((endOnInput) && ((ip+length != iend) || (cpy > oend))) { goto _output_error; }
- }
- memmove(op, ip, length); /* supports overlapping memory regions, which only matters for in-place decompression scenarios */
- ip += length;
- op += length;
- /* Necessarily EOF when !partialDecoding. When partialDecoding
- * it is EOF if we've either filled the output buffer or hit
- * the input parsing restriction.
- */
- if (!partialDecoding || (cpy == oend) || (ip == iend)) {
- break;
- }
- } else {
- LZ4_wildCopy8(op, ip, cpy); /* may overwrite up to WILDCOPYLENGTH beyond cpy */
- ip += length; op = cpy;
- }
-
- /* get offset */
- offset = LZ4_readLE16(ip); ip+=2;
- match = op - offset;
-
- /* get matchlength */
- length = token & ML_MASK;
-
- _copy_match:
- if (length == ML_MASK) {
- variable_length_error error = ok;
- length += read_variable_length(&ip, iend - LASTLITERALS + 1, endOnInput, 0, &error);
- if (error != ok) goto _output_error;
- if ((safeDecode) && unlikely((uptrval)(op)+length<(uptrval)op)) goto _output_error; /* overflow detection */
- }
- length += MINMATCH;
-
-#if LZ4_FAST_DEC_LOOP
- safe_match_copy:
-#endif
- if ((checkOffset) && (unlikely(match + dictSize < lowPrefix))) goto _output_error; /* Error : offset outside buffers */
- /* match starting within external dictionary */
- if ((dict==usingExtDict) && (match < lowPrefix)) {
- if (unlikely(op+length > oend-LASTLITERALS)) {
- if (partialDecoding) length = MIN(length, (size_t)(oend-op));
- else goto _output_error; /* doesn't respect parsing restriction */
- }
-
- if (length <= (size_t)(lowPrefix-match)) {
- /* match fits entirely within external dictionary : just copy */
- memmove(op, dictEnd - (lowPrefix-match), length);
- op += length;
- } else {
- /* match stretches into both external dictionary and current block */
- size_t const copySize = (size_t)(lowPrefix - match);
- size_t const restSize = length - copySize;
- memcpy(op, dictEnd - copySize, copySize);
- op += copySize;
- if (restSize > (size_t)(op - lowPrefix)) { /* overlap copy */
- BYTE* const endOfMatch = op + restSize;
- const BYTE* copyFrom = lowPrefix;
- while (op < endOfMatch) *op++ = *copyFrom++;
- } else {
- memcpy(op, lowPrefix, restSize);
- op += restSize;
- } }
- continue;
- }
- assert(match >= lowPrefix);
-
- /* copy match within block */
- cpy = op + length;
-
- /* partialDecoding : may end anywhere within the block */
- assert(op<=oend);
- if (partialDecoding && (cpy > oend-MATCH_SAFEGUARD_DISTANCE)) {
- size_t const mlen = MIN(length, (size_t)(oend-op));
- const BYTE* const matchEnd = match + mlen;
- BYTE* const copyEnd = op + mlen;
- if (matchEnd > op) { /* overlap copy */
- while (op < copyEnd) { *op++ = *match++; }
- } else {
- memcpy(op, match, mlen);
- }
- op = copyEnd;
- if (op == oend) { break; }
- continue;
- }
-
- if (unlikely(offset<8)) {
- LZ4_write32(op, 0); /* silence msan warning when offset==0 */
- op[0] = match[0];
- op[1] = match[1];
- op[2] = match[2];
- op[3] = match[3];
- match += inc32table[offset];
- memcpy(op+4, match, 4);
- match -= dec64table[offset];
- } else {
- memcpy(op, match, 8);
- match += 8;
- }
- op += 8;
-
- if (unlikely(cpy > oend-MATCH_SAFEGUARD_DISTANCE)) {
- BYTE* const oCopyLimit = oend - (WILDCOPYLENGTH-1);
- if (cpy > oend-LASTLITERALS) { goto _output_error; } /* Error : last LASTLITERALS bytes must be literals (uncompressed) */
- if (op < oCopyLimit) {
- LZ4_wildCopy8(op, match, oCopyLimit);
- match += oCopyLimit - op;
- op = oCopyLimit;
- }
- while (op < cpy) { *op++ = *match++; }
- } else {
- memcpy(op, match, 8);
- if (length > 16) { LZ4_wildCopy8(op+8, match+8, cpy); }
- }
- op = cpy; /* wildcopy correction */
- }
-
- /* end of decoding */
- if (endOnInput) {
- return (int) (((char*)op)-dst); /* Nb of output bytes decoded */
- } else {
- return (int) (((const char*)ip)-src); /* Nb of input bytes read */
- }
-
- /* Overflow error detected */
- _output_error:
- return (int) (-(((const char*)ip)-src))-1;
- }
-}
-
-
-/*===== Instantiate the API decoding functions. =====*/
-
-LZ4_FORCE_O2_GCC_PPC64LE
-int LZ4_decompress_safe(const char* source, char* dest, int compressedSize, int maxDecompressedSize)
-{
- return LZ4_decompress_generic(source, dest, compressedSize, maxDecompressedSize,
- endOnInputSize, decode_full_block, noDict,
- (BYTE*)dest, NULL, 0);
-}
-
-#endif /* LZ4_COMMONDEFS_ONLY */