target/linux/generic/hack-5.4/531-debloat_lzma.patch

From 3fd297761ac246c54d7723c57fca95c112b99465 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 15 Jul 2017 21:15:44 +0200
Subject: lzma: de-bloat the lzma library used by jffs2

lede-commit: 3fd1dd08fbcbb78b34efefd32c3032e5c99108d6
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 include/linux/lzma/LzFind.h  |  17 ---
 include/linux/lzma/LzmaDec.h | 101 ---------------
 include/linux/lzma/LzmaEnc.h |  20 ---
 lib/lzma/LzFind.c            | 287 ++++---------------------------------------
 lib/lzma/LzmaDec.c           |  86 +------------
 lib/lzma/LzmaEnc.c           | 172 ++------------------------
 6 files changed, 42 insertions(+), 641 deletions(-)

--- a/include/linux/lzma/LzFind.h
+++ b/include/linux/lzma/LzFind.h
@@ -55,11 +55,6 @@ typedef struct _CMatchFinder
 
 #define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)
 
-int MatchFinder_NeedMove(CMatchFinder *p);
-Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p);
-void MatchFinder_MoveBlock(CMatchFinder *p);
-void MatchFinder_ReadIfRequired(CMatchFinder *p);
-
 void MatchFinder_Construct(CMatchFinder *p);
 
 /* Conditions:
@@ -70,12 +65,6 @@ int MatchFinder_Create(CMatchFinder *p,
     UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter,
     ISzAlloc *alloc);
 void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc);
-void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems);
-void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue);
-
-UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *buffer, CLzRef *son,
-    UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 _cutValue,
-    UInt32 *distances, UInt32 maxLen);
 
 /*
 Conditions:
@@ -102,12 +91,6 @@ typedef struct _IMatchFinder
 
 void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable);
 
-void MatchFinder_Init(CMatchFinder *p);
-UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
-UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
-void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
-void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
-
 #ifdef __cplusplus
 }
 #endif
--- a/include/linux/lzma/LzmaDec.h
+++ b/include/linux/lzma/LzmaDec.h
@@ -31,14 +31,6 @@ typedef struct _CLzmaProps
   UInt32 dicSize;
 } CLzmaProps;
 
-/* LzmaProps_Decode - decodes properties
-Returns:
-  SZ_OK
-  SZ_ERROR_UNSUPPORTED - Unsupported properties
-*/
-
-SRes LzmaProps_Decode(CLzmaProps *p, const Byte *data, unsigned size);
-
 
 /* ---------- LZMA Decoder state ---------- */
 
@@ -70,8 +62,6 @@ typedef struct
 
 #define LzmaDec_Construct(p) { (p)->dic = 0; (p)->probs = 0; }
 
-void LzmaDec_Init(CLzmaDec *p);
-
 /* There are two types of LZMA streams:
      0) Stream with end mark. That end mark adds about 6 bytes to compressed size.
      1) Stream without end mark. You must know exact uncompressed size to decompress such stream. */
@@ -108,97 +98,6 @@ typedef enum
 
 /* ELzmaStatus is used only as output value for function call */
 
-
-/* ---------- Interfaces ---------- */
-
-/* There are 3 levels of interfaces:
-     1) Dictionary Interface
-     2) Buffer Interface
-     3) One Call Interface
-   You can select any of these interfaces, but don't mix functions from different
-   groups for same object. */
-
-
-/* There are two variants to allocate state for Dictionary Interface:
-     1) LzmaDec_Allocate / LzmaDec_Free
-     2) LzmaDec_AllocateProbs / LzmaDec_FreeProbs
-   You can use variant 2, if you set dictionary buffer manually.
-   For Buffer Interface you must always use variant 1.
-
-LzmaDec_Allocate* can return:
-  SZ_OK
-  SZ_ERROR_MEM         - Memory allocation error
-  SZ_ERROR_UNSUPPORTED - Unsupported properties
-*/
-
-SRes LzmaDec_AllocateProbs(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc);
-void LzmaDec_FreeProbs(CLzmaDec *p, ISzAlloc *alloc);
-
-SRes LzmaDec_Allocate(CLzmaDec *state, const Byte *prop, unsigned propsSize, ISzAlloc *alloc);
-void LzmaDec_Free(CLzmaDec *state, ISzAlloc *alloc);
-
-/* ---------- Dictionary Interface ---------- */
-
-/* You can use it, if you want to eliminate the overhead for data copying from
-   dictionary to some other external buffer.
-   You must work with CLzmaDec variables directly in this interface.
-
-   STEPS:
-     LzmaDec_Constr()
-     LzmaDec_Allocate()
-     for (each new stream)
-     {
-       LzmaDec_Init()
-       while (it needs more decompression)
-       {
-         LzmaDec_DecodeToDic()
-         use data from CLzmaDec::dic and update CLzmaDec::dicPos
-       }
-     }
-     LzmaDec_Free()
-*/
-
-/* LzmaDec_DecodeToDic
-
-   The decoding to internal dictionary buffer (CLzmaDec::dic).
-   You must manually update CLzmaDec::dicPos, if it reaches CLzmaDec::dicBufSize !!!
-
-finishMode:
-  It has meaning only if the decoding reaches output limit (dicLimit).
-  LZMA_FINISH_ANY - Decode just dicLimit bytes.
-  LZMA_FINISH_END - Stream must be finished after dicLimit.
-
-Returns:
-  SZ_OK
-    status:
-      LZMA_STATUS_FINISHED_WITH_MARK
-      LZMA_STATUS_NOT_FINISHED
-      LZMA_STATUS_NEEDS_MORE_INPUT
-      LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK
-  SZ_ERROR_DATA - Data error
-*/
-
-SRes LzmaDec_DecodeToDic(CLzmaDec *p, SizeT dicLimit,
-    const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status);
-
-
-/* ---------- Buffer Interface ---------- */
-
-/* It's zlib-like interface.
-   See LzmaDec_DecodeToDic description for information about STEPS and return results,
-   but you must use LzmaDec_DecodeToBuf instead of LzmaDec_DecodeToDic and you don't need
-   to work with CLzmaDec variables manually.
-
-finishMode:
-  It has meaning only if the decoding reaches output limit (*destLen).
-  LZMA_FINISH_ANY - Decode just destLen bytes.
-  LZMA_FINISH_END - Stream must be finished after (*destLen).
-*/
-
-SRes LzmaDec_DecodeToBuf(CLzmaDec *p, Byte *dest, SizeT *destLen,
-    const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status);
-
-
 /* ---------- One Call Interface ---------- */
 
 /* LzmaDecode
--- a/include/linux/lzma/LzmaEnc.h
+++ b/include/linux/lzma/LzmaEnc.h
@@ -31,9 +31,6 @@ typedef struct _CLzmaEncProps
 } CLzmaEncProps;
 
 void LzmaEncProps_Init(CLzmaEncProps *p);
-void LzmaEncProps_Normalize(CLzmaEncProps *p);
-UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2);
-
 
 /* ---------- CLzmaEncHandle Interface ---------- */
 
@@ -53,26 +50,9 @@ CLzmaEncHandle LzmaEnc_Create(ISzAlloc *
 void LzmaEnc_Destroy(CLzmaEncHandle p, ISzAlloc *alloc, ISzAlloc *allocBig);
 SRes LzmaEnc_SetProps(CLzmaEncHandle p, const CLzmaEncProps *props);
 SRes LzmaEnc_WriteProperties(CLzmaEncHandle p, Byte *properties, SizeT *size);
-SRes LzmaEnc_Encode(CLzmaEncHandle p, ISeqOutStream *outStream, ISeqInStream *inStream,
-    ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
 SRes LzmaEnc_MemEncode(CLzmaEncHandle p, Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
     int writeEndMark, ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
 
-/* ---------- One Call Interface ---------- */
-
-/* LzmaEncode
-Return code:
-  SZ_OK               - OK
-  SZ_ERROR_MEM        - Memory allocation error
-  SZ_ERROR_PARAM      - Incorrect paramater
-  SZ_ERROR_OUTPUT_EOF - output buffer overflow
-  SZ_ERROR_THREAD     - errors in multithreading functions (only for Mt version)
-*/
-
-SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
-    const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
-    ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig);
-
 #ifdef __cplusplus
 }
 #endif
--- a/lib/lzma/LzFind.c
+++ b/lib/lzma/LzFind.c
@@ -14,9 +14,15 @@
 
 #define kStartMaxLen 3
 
+#if 0
+#define DIRECT_INPUT	p->directInput
+#else
+#define DIRECT_INPUT	1
+#endif
+
 static void LzInWindow_Free(CMatchFinder *p, ISzAlloc *alloc)
 {
-  if (!p->directInput)
+  if (!DIRECT_INPUT)
   {
     alloc->Free(alloc, p->bufferBase);
     p->bufferBase = 0;
@@ -28,7 +34,7 @@ static void LzInWindow_Free(CMatchFinder
 static int LzInWindow_Create(CMatchFinder *p, UInt32 keepSizeReserv, ISzAlloc *alloc)
 {
   UInt32 blockSize = p->keepSizeBefore + p->keepSizeAfter + keepSizeReserv;
-  if (p->directInput)
+  if (DIRECT_INPUT)
   {
     p->blockSize = blockSize;
     return 1;
@@ -42,12 +48,12 @@ static int LzInWindow_Create(CMatchFinde
   return (p->bufferBase != 0);
 }
 
-Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p) { return p->buffer; }
-Byte MatchFinder_GetIndexByte(CMatchFinder *p, Int32 index) { return p->buffer[index]; }
+static Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p) { return p->buffer; }
+static Byte MatchFinder_GetIndexByte(CMatchFinder *p, Int32 index) { return p->buffer[index]; }
 
-UInt32 MatchFinder_GetNumAvailableBytes(CMatchFinder *p) { return p->streamPos - p->pos; }
+static UInt32 MatchFinder_GetNumAvailableBytes(CMatchFinder *p) { return p->streamPos - p->pos; }
 
-void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue)
+static void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue)
 {
   p->posLimit -= subValue;
   p->pos -= subValue;
@@ -58,7 +64,7 @@ static void MatchFinder_ReadBlock(CMatch
 {
   if (p->streamEndWasReached || p->result != SZ_OK)
     return;
-  if (p->directInput)
+  if (DIRECT_INPUT)
   {
     UInt32 curSize = 0xFFFFFFFF - p->streamPos;
     if (curSize > p->directInputRem)
@@ -89,7 +95,7 @@ static void MatchFinder_ReadBlock(CMatch
   }
 }
 
-void MatchFinder_MoveBlock(CMatchFinder *p)
+static void MatchFinder_MoveBlock(CMatchFinder *p)
 {
   memmove(p->bufferBase,
     p->buffer - p->keepSizeBefore,
@@ -97,22 +103,14 @@ void MatchFinder_MoveBlock(CMatchFinder
   p->buffer = p->bufferBase + p->keepSizeBefore;
 }
 
-int MatchFinder_NeedMove(CMatchFinder *p)
+static int MatchFinder_NeedMove(CMatchFinder *p)
 {
-  if (p->directInput)
+  if (DIRECT_INPUT)
     return 0;
   /* if (p->streamEndWasReached) return 0; */
   return ((size_t)(p->bufferBase + p->blockSize - p->buffer) <= p->keepSizeAfter);
 }
 
-void MatchFinder_ReadIfRequired(CMatchFinder *p)
-{
-  if (p->streamEndWasReached)
-    return;
-  if (p->keepSizeAfter >= p->streamPos - p->pos)
-    MatchFinder_ReadBlock(p);
-}
-
 static void MatchFinder_CheckAndMoveAndRead(CMatchFinder *p)
 {
   if (MatchFinder_NeedMove(p))
@@ -268,7 +266,7 @@ static void MatchFinder_SetLimits(CMatch
   p->posLimit = p->pos + limit;
 }
 
-void MatchFinder_Init(CMatchFinder *p)
+static void MatchFinder_Init(CMatchFinder *p)
 {
   UInt32 i;
   for (i = 0; i < p->hashSizeSum; i++)
@@ -287,7 +285,7 @@ static UInt32 MatchFinder_GetSubValue(CM
   return (p->pos - p->historySize - 1) & kNormalizeMask;
 }
 
-void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems)
+static void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems)
 {
   UInt32 i;
   for (i = 0; i < numItems; i++)
@@ -319,38 +317,7 @@ static void MatchFinder_CheckLimits(CMat
   MatchFinder_SetLimits(p);
 }
 
-static UInt32 * Hc_GetMatchesSpec(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
-    UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue,
-    UInt32 *distances, UInt32 maxLen)
-{
-  son[_cyclicBufferPos] = curMatch;
-  for (;;)
-  {
-    UInt32 delta = pos - curMatch;
-    if (cutValue-- == 0 || delta >= _cyclicBufferSize)
-      return distances;
-    {
-      const Byte *pb = cur - delta;
-      curMatch = son[_cyclicBufferPos - delta + ((delta > _cyclicBufferPos) ? _cyclicBufferSize : 0)];
-      if (pb[maxLen] == cur[maxLen] && *pb == *cur)
-      {
-        UInt32 len = 0;
-        while (++len != lenLimit)
-          if (pb[len] != cur[len])
-            break;
-        if (maxLen < len)
-        {
-          *distances++ = maxLen = len;
-          *distances++ = delta - 1;
-          if (len == lenLimit)
-            return distances;
-        }
-      }
-    }
-  }
-}
-
-UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
+static UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *cur, CLzRef *son,
     UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 cutValue,
     UInt32 *distances, UInt32 maxLen)
 {
@@ -460,10 +427,10 @@ static void SkipMatchesSpec(UInt32 lenLi
   p->buffer++; \
   if (++p->pos == p->posLimit) MatchFinder_CheckLimits(p);
 
-#define MOVE_POS_RET MOVE_POS return offset;
-
 static void MatchFinder_MovePos(CMatchFinder *p) { MOVE_POS; }
 
+#define MOVE_POS_RET MatchFinder_MovePos(p); return offset;
+
 #define GET_MATCHES_HEADER2(minLen, ret_op) \
   UInt32 lenLimit; UInt32 hashValue; const Byte *cur; UInt32 curMatch; \
   lenLimit = p->lenLimit; { if (lenLimit < minLen) { MatchFinder_MovePos(p); ret_op; }} \
@@ -479,62 +446,7 @@ static void MatchFinder_MovePos(CMatchFi
   distances + offset, maxLen) - distances); MOVE_POS_RET;
 
 #define SKIP_FOOTER \
-  SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p)); MOVE_POS;
-
-static UInt32 Bt2_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
-{
-  UInt32 offset;
-  GET_MATCHES_HEADER(2)
-  HASH2_CALC;
-  curMatch = p->hash[hashValue];
-  p->hash[hashValue] = p->pos;
-  offset = 0;
-  GET_MATCHES_FOOTER(offset, 1)
-}
-
-UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
-{
-  UInt32 offset;
-  GET_MATCHES_HEADER(3)
-  HASH_ZIP_CALC;
-  curMatch = p->hash[hashValue];
-  p->hash[hashValue] = p->pos;
-  offset = 0;
-  GET_MATCHES_FOOTER(offset, 2)
-}
-
-static UInt32 Bt3_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
-{
-  UInt32 hash2Value, delta2, maxLen, offset;
-  GET_MATCHES_HEADER(3)
-
-  HASH3_CALC;
-
-  delta2 = p->pos - p->hash[hash2Value];
-  curMatch = p->hash[kFix3HashSize + hashValue];
-
-  p->hash[hash2Value] =
-  p->hash[kFix3HashSize + hashValue] = p->pos;
-
-
-  maxLen = 2;
-  offset = 0;
-  if (delta2 < p->cyclicBufferSize && *(cur - delta2) == *cur)
-  {
-    for (; maxLen != lenLimit; maxLen++)
-      if (cur[(ptrdiff_t)maxLen - delta2] != cur[maxLen])
-        break;
-    distances[0] = maxLen;
-    distances[1] = delta2 - 1;
-    offset = 2;
-    if (maxLen == lenLimit)
-    {
-      SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p));
-      MOVE_POS_RET;
-    }
-  }
-  GET_MATCHES_FOOTER(offset, maxLen)
-}
+  SkipMatchesSpec(lenLimit, curMatch, MF_PARAMS(p)); MatchFinder_MovePos(p);
 
 static UInt32 Bt4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
 {
@@ -583,108 +495,6 @@ static UInt32 Bt4_MatchFinder_GetMatches
   GET_MATCHES_FOOTER(offset, maxLen)
 }
 
-static UInt32 Hc4_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
-{
-  UInt32 hash2Value, hash3Value, delta2, delta3, maxLen, offset;
-  GET_MATCHES_HEADER(4)
-
-  HASH4_CALC;
-
-  delta2 = p->pos - p->hash[                hash2Value];
-  delta3 = p->pos - p->hash[kFix3HashSize + hash3Value];
-  curMatch = p->hash[kFix4HashSize + hashValue];
-
-  p->hash[                hash2Value] =
-  p->hash[kFix3HashSize + hash3Value] =
-  p->hash[kFix4HashSize + hashValue] = p->pos;
-
-  maxLen = 1;
-  offset = 0;
-  if (delta2 < p->cyclicBufferSize && *(cur - delta2) == *cur)
-  {
-    distances[0] = maxLen = 2;
-    distances[1] = delta2 - 1;
-    offset = 2;
-  }
-  if (delta2 != delta3 && delta3 < p->cyclicBufferSize && *(cur - delta3) == *cur)
-  {
-    maxLen = 3;
-    distances[offset + 1] = delta3 - 1;
-    offset += 2;
-    delta2 = delta3;
-  }
-  if (offset != 0)
-  {
-    for (; maxLen != lenLimit; maxLen++)
-      if (cur[(ptrdiff_t)maxLen - delta2] != cur[maxLen])
-        break;
-    distances[offset - 2] = maxLen;
-    if (maxLen == lenLimit)
-    {
-      p->son[p->cyclicBufferPos] = curMatch;
-      MOVE_POS_RET;
-    }
-  }
-  if (maxLen < 3)
-    maxLen = 3;
-  offset = (UInt32)(Hc_GetMatchesSpec(lenLimit, curMatch, MF_PARAMS(p),
-    distances + offset, maxLen) - (distances));
-  MOVE_POS_RET
-}
-
-UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances)
-{
-  UInt32 offset;
-  GET_MATCHES_HEADER(3)
-  HASH_ZIP_CALC;
-  curMatch = p->hash[hashValue];
-  p->hash[hashValue] = p->pos;
-  offset = (UInt32)(Hc_GetMatchesSpec(lenLimit, curMatch, MF_PARAMS(p),
-    distances, 2) - (distances));
-  MOVE_POS_RET
-}
-
-static void Bt2_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
-{
-  do
-  {
-    SKIP_HEADER(2)
-    HASH2_CALC;
-    curMatch = p->hash[hashValue];
-    p->hash[hashValue] = p->pos;
-    SKIP_FOOTER
-  }
-  while (--num != 0);
-}
-
-void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
-{
-  do
-  {
-    SKIP_HEADER(3)
-    HASH_ZIP_CALC;
-    curMatch = p->hash[hashValue];
-    p->hash[hashValue] = p->pos;
-    SKIP_FOOTER
-  }
-  while (--num != 0);
-}
-
-static void Bt3_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
-{
-  do
-  {
-    UInt32 hash2Value;
-    SKIP_HEADER(3)
-    HASH3_CALC;
-    curMatch = p->hash[kFix3HashSize + hashValue];
-    p->hash[hash2Value] =
-    p->hash[kFix3HashSize + hashValue] = p->pos;
-    SKIP_FOOTER
-  }
-  while (--num != 0);
-}
-
 static void Bt4_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
 {
   do
@@ -701,61 +511,12 @@ static void Bt4_MatchFinder_Skip(CMatchF
   while (--num != 0);
 }
 
-static void Hc4_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
-{
-  do
-  {
-    UInt32 hash2Value, hash3Value;
-    SKIP_HEADER(4)
-    HASH4_CALC;
-    curMatch = p->hash[kFix4HashSize + hashValue];
-    p->hash[                hash2Value] =
-    p->hash[kFix3HashSize + hash3Value] =
-    p->hash[kFix4HashSize + hashValue] = p->pos;
-    p->son[p->cyclicBufferPos] = curMatch;
-    MOVE_POS
-  }
-  while (--num != 0);
-}
-
-void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num)
-{
-  do
-  {
-    SKIP_HEADER(3)
-    HASH_ZIP_CALC;
-    curMatch = p->hash[hashValue];
-    p->hash[hashValue] = p->pos;
-    p->son[p->cyclicBufferPos] = curMatch;
-    MOVE_POS
-  }
-  while (--num != 0);
-}
-
 void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable)
 {
   vTable->Init = (Mf_Init_Func)MatchFinder_Init;
   vTable->GetIndexByte = (Mf_GetIndexByte_Func)MatchFinder_GetIndexByte;
   vTable->GetNumAvailableBytes = (Mf_GetNumAvailableBytes_Func)MatchFinder_GetNumAvailableBytes;
   vTable->GetPointerToCurrentPos = (Mf_GetPointerToCurrentPos_Func)MatchFinder_GetPointerToCurrentPos;
-  if (!p->btMode)
-  {
-    vTable->GetMatches = (Mf_GetMatches_Func)Hc4_MatchFinder_GetMatches;
-    vTable->Skip = (Mf_Skip_Func)Hc4_MatchFinder_Skip;
-  }
-  else if (p->numHashBytes == 2)
-  {
-    vTable->GetMatches = (Mf_GetMatches_Func)Bt2_MatchFinder_GetMatches;
-    vTable->Skip = (Mf_Skip_Func)Bt2_MatchFinder_Skip;
-  }
-  else if (p->numHashBytes == 3)
-  {
-    vTable->GetMatches = (Mf_GetMatches_Func)Bt3_MatchFinder_GetMatches;
-    vTable->Skip = (Mf_Skip_Func)Bt3_MatchFinder_Skip;
-  }
-  else
-  {
-    vTable->GetMatches = (Mf_GetMatches_Func)Bt4_MatchFinder_GetMatches;
-    vTable->Skip = (Mf_Skip_Func)Bt4_MatchFinder_Skip;
-  }
+  vTable->GetMatches = (Mf_GetMatches_Func)Bt4_MatchFinder_GetMatches;
+  vTable->Skip = (Mf_Skip_Func)Bt4_MatchFinder_Skip;
 }
--- a/lib/lzma/LzmaDec.c
+++ b/lib/lzma/LzmaDec.c
@@ -682,7 +682,7 @@ static void LzmaDec_InitRc(CLzmaDec *p,
   p->needFlush = 0;
 }
 
-void LzmaDec_InitDicAndState(CLzmaDec *p, Bool initDic, Bool initState)
+static void LzmaDec_InitDicAndState(CLzmaDec *p, Bool initDic, Bool initState)
 {
   p->needFlush = 1;
   p->remainLen = 0;
@@ -698,7 +698,7 @@ void LzmaDec_InitDicAndState(CLzmaDec *p
     p->needInitState = 1;
 }
 
-void LzmaDec_Init(CLzmaDec *p)
+static void LzmaDec_Init(CLzmaDec *p)
 {
   p->dicPos = 0;
   LzmaDec_InitDicAndState(p, True, True);
@@ -716,7 +716,7 @@ static void LzmaDec_InitStateReal(CLzmaD
   p->needInitState = 0;
 }
 
-SRes LzmaDec_DecodeToDic(CLzmaDec *p, SizeT dicLimit, const Byte *src, SizeT *srcLen,
+static SRes LzmaDec_DecodeToDic(CLzmaDec *p, SizeT dicLimit, const Byte *src, SizeT *srcLen,
     ELzmaFinishMode finishMode, ELzmaStatus *status)
 {
   SizeT inSize = *srcLen;
@@ -837,65 +837,13 @@ SRes LzmaDec_DecodeToDic(CLzmaDec *p, Si
   return (p->code == 0) ? SZ_OK : SZ_ERROR_DATA;
 }
 
-SRes LzmaDec_DecodeToBuf(CLzmaDec *p, Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen, ELzmaFinishMode finishMode, ELzmaStatus *status)
-{
-  SizeT outSize = *destLen;
-  SizeT inSize = *srcLen;
-  *srcLen = *destLen = 0;
-  for (;;)
-  {
-    SizeT inSizeCur = inSize, outSizeCur, dicPos;
-    ELzmaFinishMode curFinishMode;
-    SRes res;
-    if (p->dicPos == p->dicBufSize)
-      p->dicPos = 0;
-    dicPos = p->dicPos;
-    if (outSize > p->dicBufSize - dicPos)
-    {
-      outSizeCur = p->dicBufSize;
-      curFinishMode = LZMA_FINISH_ANY;
-    }
-    else
-    {
-      outSizeCur = dicPos + outSize;
-      curFinishMode = finishMode;
-    }
-
-    res = LzmaDec_DecodeToDic(p, outSizeCur, src, &inSizeCur, curFinishMode, status);
-    src += inSizeCur;
-    inSize -= inSizeCur;
-    *srcLen += inSizeCur;
-    outSizeCur = p->dicPos - dicPos;
-    memcpy(dest, p->dic + dicPos, outSizeCur);
-    dest += outSizeCur;
-    outSize -= outSizeCur;
-    *destLen += outSizeCur;
-    if (res != 0)
-      return res;
-    if (outSizeCur == 0 || outSize == 0)
-      return SZ_OK;
-  }
-}
-
-void LzmaDec_FreeProbs(CLzmaDec *p, ISzAlloc *alloc)
+static void LzmaDec_FreeProbs(CLzmaDec *p, ISzAlloc *alloc)
 {
   alloc->Free(alloc, p->probs);
   p->probs = 0;
 }
 
-static void LzmaDec_FreeDict(CLzmaDec *p, ISzAlloc *alloc)
-{
-  alloc->Free(alloc, p->dic);
-  p->dic = 0;
-}
-
-void LzmaDec_Free(CLzmaDec *p, ISzAlloc *alloc)
-{
-  LzmaDec_FreeProbs(p, alloc);
-  LzmaDec_FreeDict(p, alloc);
-}
-
-SRes LzmaProps_Decode(CLzmaProps *p, const Byte *data, unsigned size)
+static SRes LzmaProps_Decode(CLzmaProps *p, const Byte *data, unsigned size)
 {
   UInt32 dicSize;
   Byte d;
@@ -935,7 +883,7 @@ static SRes LzmaDec_AllocateProbs2(CLzma
   return SZ_OK;
 }
 
-SRes LzmaDec_AllocateProbs(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
+static SRes LzmaDec_AllocateProbs(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
 {
   CLzmaProps propNew;
   RINOK(LzmaProps_Decode(&propNew, props, propsSize));
@@ -943,28 +891,6 @@ SRes LzmaDec_AllocateProbs(CLzmaDec *p,
   p->prop = propNew;
   return SZ_OK;
 }
-
-SRes LzmaDec_Allocate(CLzmaDec *p, const Byte *props, unsigned propsSize, ISzAlloc *alloc)
-{
-  CLzmaProps propNew;
-  SizeT dicBufSize;
-  RINOK(LzmaProps_Decode(&propNew, props, propsSize));
-  RINOK(LzmaDec_AllocateProbs2(p, &propNew, alloc));
-  dicBufSize = propNew.dicSize;
-  if (p->dic == 0 || dicBufSize != p->dicBufSize)
-  {
-    LzmaDec_FreeDict(p, alloc);
-    p->dic = (Byte *)alloc->Alloc(alloc, dicBufSize);
-    if (p->dic == 0)
-    {
-      LzmaDec_FreeProbs(p, alloc);
-      return SZ_ERROR_MEM;
-    }
-  }
-  p->dicBufSize = dicBufSize;
-  p->prop = propNew;
-  return SZ_OK;
-}
 
 SRes LzmaDecode(Byte *dest, SizeT *destLen, const Byte *src, SizeT *srcLen,
     const Byte *propData, unsigned propSize, ELzmaFinishMode finishMode,
--- a/lib/lzma/LzmaEnc.c
+++ b/lib/lzma/LzmaEnc.c
@@ -53,7 +53,7 @@ void LzmaEncProps_Init(CLzmaEncProps *p)
   p->writeEndMark = 0;
 }
 
-void LzmaEncProps_Normalize(CLzmaEncProps *p)
+static void LzmaEncProps_Normalize(CLzmaEncProps *p)
 {
   int level = p->level;
   if (level < 0) level = 5;
@@ -76,7 +76,7 @@ void LzmaEncProps_Normalize(CLzmaEncProp
       #endif
 }
 
-UInt32 LzmaEncProps_GetDictSize(const CLzmaEncProps *props2)
+static UInt32 __maybe_unused LzmaEncProps_GetDictSize(const CLzmaEncProps *props2)
 {
   CLzmaEncProps props = *props2;
   LzmaEncProps_Normalize(&props);
@@ -93,7 +93,7 @@ UInt32 LzmaEncProps_GetDictSize(const CL
 
 #define BSR2_RET(pos, res) { unsigned long i; _BitScanReverse(&i, (pos)); res = (i + i) + ((pos >> (i - 1)) & 1); }
 
-UInt32 GetPosSlot1(UInt32 pos)
+static UInt32 GetPosSlot1(UInt32 pos)
 {
   UInt32 res;
   BSR2_RET(pos, res);
@@ -107,7 +107,7 @@ UInt32 GetPosSlot1(UInt32 pos)
 #define kNumLogBits (9 + (int)sizeof(size_t) / 2)
 #define kDicLogSizeMaxCompress ((kNumLogBits - 1) * 2 + 7)
 
-void LzmaEnc_FastPosInit(Byte *g_FastPos)
+static void LzmaEnc_FastPosInit(Byte *g_FastPos)
 {
   int c = 2, slotFast;
   g_FastPos[0] = 0;
@@ -339,58 +339,6 @@ typedef struct
   CSaveState saveState;
 } CLzmaEnc;
 
-void LzmaEnc_SaveState(CLzmaEncHandle pp)
-{
-  CLzmaEnc *p = (CLzmaEnc *)pp;
-  CSaveState *dest = &p->saveState;
-  int i;
-  dest->lenEnc = p->lenEnc;
-  dest->repLenEnc = p->repLenEnc;
-  dest->state = p->state;
-
-  for (i = 0; i < kNumStates; i++)
-  {
-    memcpy(dest->isMatch[i], p->isMatch[i], sizeof(p->isMatch[i]));
-    memcpy(dest->isRep0Long[i], p->isRep0Long[i], sizeof(p->isRep0Long[i]));
-  }
-  for (i = 0; i < kNumLenToPosStates; i++)
-    memcpy(dest->posSlotEncoder[i], p->posSlotEncoder[i], sizeof(p->posSlotEncoder[i]));
-  memcpy(dest->isRep, p->isRep, sizeof(p->isRep));
-  memcpy(dest->isRepG0, p->isRepG0, sizeof(p->isRepG0));
-  memcpy(dest->isRepG1, p->isRepG1, sizeof(p->isRepG1));
-  memcpy(dest->isRepG2, p->isRepG2, sizeof(p->isRepG2));
-  memcpy(dest->posEncoders, p->posEncoders, sizeof(p->posEncoders));
-  memcpy(dest->posAlignEncoder, p->posAlignEncoder, sizeof(p->posAlignEncoder));
-  memcpy(dest->reps, p->reps, sizeof(p->reps));
-  memcpy(dest->litProbs, p->litProbs, (0x300 << p->lclp) * sizeof(CLzmaProb));
-}
-
-void LzmaEnc_RestoreState(CLzmaEncHandle pp)
-{
-  CLzmaEnc *dest = (CLzmaEnc *)pp;
-  const CSaveState *p = &dest->saveState;
-  int i;
-  dest->lenEnc = p->lenEnc;
-  dest->repLenEnc = p->repLenEnc;
-  dest->state = p->state;
-
-  for (i = 0; i < kNumStates; i++)
-  {
-    memcpy(dest->isMatch[i], p->isMatch[i], sizeof(p->isMatch[i]));
-    memcpy(dest->isRep0Long[i], p->isRep0Long[i], sizeof(p->isRep0Long[i]));
-  }
-  for (i = 0; i < kNumLenToPosStates; i++)
-    memcpy(dest->posSlotEncoder[i], p->posSlotEncoder[i], sizeof(p->posSlotEncoder[i]));
-  memcpy(dest->isRep, p->isRep, sizeof(p->isRep));
-  memcpy(dest->isRepG0, p->isRepG0, sizeof(p->isRepG0));
-  memcpy(dest->isRepG1, p->isRepG1, sizeof(p->isRepG1));
-  memcpy(dest->isRepG2, p->isRepG2, sizeof(p->isRepG2));
-  memcpy(dest->posEncoders, p->posEncoders, sizeof(p->posEncoders));
-  memcpy(dest->posAlignEncoder, p->posAlignEncoder, sizeof(p->posAlignEncoder));
-  memcpy(dest->reps, p->reps, sizeof(p->reps));
-  memcpy(dest->litProbs, p->litProbs, (0x300 << dest->lclp) * sizeof(CLzmaProb));
-}
-
 SRes LzmaEnc_SetProps(CLzmaEncHandle pp, const CLzmaEncProps *props2)
 {
   CLzmaEnc *p = (CLzmaEnc *)pp;
@@ -600,7 +548,7 @@ static void LitEnc_EncodeMatched(CRangeE
   while (symbol < 0x10000);
 }
 
-void LzmaEnc_InitPriceTables(UInt32 *ProbPrices)
+static void LzmaEnc_InitPriceTables(UInt32 *ProbPrices)
 {
   UInt32 i;
   for (i = (1 << kNumMoveReducingBits) / 2; i < kBitModelTotal; i += (1 << kNumMoveReducingBits))
@@ -1676,7 +1624,7 @@ static void FillDistancesPrices(CLzmaEnc
   p->matchPriceCount = 0;
 }
 
-void LzmaEnc_Construct(CLzmaEnc *p)
+static void LzmaEnc_Construct(CLzmaEnc *p)
 {
   RangeEnc_Construct(&p->rc);
   MatchFinder_Construct(&p->matchFinderBase);
@@ -1709,7 +1657,7 @@ CLzmaEncHandle LzmaEnc_Create(ISzAlloc *
   return p;
 }
 
-void LzmaEnc_FreeLits(CLzmaEnc *p, ISzAlloc *alloc)
+static void LzmaEnc_FreeLits(CLzmaEnc *p, ISzAlloc *alloc)
 {
   alloc->Free(alloc, p->litProbs);
   alloc->Free(alloc, p->saveState.litProbs);
@@ -1717,7 +1665,7 @@ void LzmaEnc_FreeLits(CLzmaEnc *p, ISzAl
   p->saveState.litProbs = 0;
 }
 
-void LzmaEnc_Destruct(CLzmaEnc *p, ISzAlloc *alloc, ISzAlloc *allocBig)
+static void LzmaEnc_Destruct(CLzmaEnc *p, ISzAlloc *alloc, ISzAlloc *allocBig)
 {
   #ifndef _7ZIP_ST
   MatchFinderMt_Destruct(&p->matchFinderMt, allocBig);
@@ -1947,7 +1895,7 @@ static SRes LzmaEnc_Alloc(CLzmaEnc *p, U
   return SZ_OK;
 }
 
-void LzmaEnc_Init(CLzmaEnc *p)
+static void LzmaEnc_Init(CLzmaEnc *p)
 {
   UInt32 i;
   p->state = 0;
@@ -2005,7 +1953,7 @@ void LzmaEnc_Init(CLzmaEnc *p)
   p->lpMask = (1 << p->lp) - 1;
 }
 
-void LzmaEnc_InitPrices(CLzmaEnc *p)
+static void LzmaEnc_InitPrices(CLzmaEnc *p)
 {
   if (!p->fastMode)
   {
@@ -2037,26 +1985,6 @@ static SRes LzmaEnc_AllocAndInit(CLzmaEn
   return SZ_OK;
 }
 
-static SRes LzmaEnc_Prepare(CLzmaEncHandle pp, ISeqOutStream *outStream, ISeqInStream *inStream,
-    ISzAlloc *alloc, ISzAlloc *allocBig)
-{
-  CLzmaEnc *p = (CLzmaEnc *)pp;
-  p->matchFinderBase.stream = inStream;
-  p->needInit = 1;
-  p->rc.outStream = outStream;
-  return LzmaEnc_AllocAndInit(p, 0, alloc, allocBig);
-}
-
-SRes LzmaEnc_PrepareForLzma2(CLzmaEncHandle pp,
-    ISeqInStream *inStream, UInt32 keepWindowSize,
-    ISzAlloc *alloc, ISzAlloc *allocBig)
-{
-  CLzmaEnc *p = (CLzmaEnc *)pp;
-  p->matchFinderBase.stream = inStream;
-  p->needInit = 1;
-  return LzmaEnc_AllocAndInit(p, keepWindowSize, alloc, allocBig);
-}
-
 static void LzmaEnc_SetInputBuf(CLzmaEnc *p, const Byte *src, SizeT srcLen)
 {
   p->matchFinderBase.directInput = 1;
@@ -2064,7 +1992,7 @@ static void LzmaEnc_SetInputBuf(CLzmaEnc
   p->matchFinderBase.directInputRem = srcLen;
 }
 
-SRes LzmaEnc_MemPrepare(CLzmaEncHandle pp, const Byte *src, SizeT srcLen,
+static SRes LzmaEnc_MemPrepare(CLzmaEncHandle pp, const Byte *src, SizeT srcLen,
     UInt32 keepWindowSize, ISzAlloc *alloc, ISzAlloc *allocBig)
 {
   CLzmaEnc *p = (CLzmaEnc *)pp;
@@ -2074,7 +2002,7 @@ SRes LzmaEnc_MemPrepare(CLzmaEncHandle p
   return LzmaEnc_AllocAndInit(p, keepWindowSize, alloc, allocBig);
 }
 
-void LzmaEnc_Finish(CLzmaEncHandle pp)
+static void LzmaEnc_Finish(CLzmaEncHandle pp)
 {
   #ifndef _7ZIP_ST
   CLzmaEnc *p = (CLzmaEnc *)pp;
@@ -2107,53 +2035,6 @@ static size_t MyWrite(void *pp, const vo
   return size;
 }
 
-
-UInt32 LzmaEnc_GetNumAvailableBytes(CLzmaEncHandle pp)
-{
-  const CLzmaEnc *p = (CLzmaEnc *)pp;
-  return p->matchFinder.GetNumAvailableBytes(p->matchFinderObj);
-}
-
-const Byte *LzmaEnc_GetCurBuf(CLzmaEncHandle pp)
-{
-  const CLzmaEnc *p = (CLzmaEnc *)pp;
-  return p->matchFinder.GetPointerToCurrentPos(p->matchFinderObj) - p->additionalOffset;
-}
-
-SRes LzmaEnc_CodeOneMemBlock(CLzmaEncHandle pp, Bool reInit,
-    Byte *dest, size_t *destLen, UInt32 desiredPackSize, UInt32 *unpackSize)
-{
-  CLzmaEnc *p = (CLzmaEnc *)pp;
-  UInt64 nowPos64;
-  SRes res;
-  CSeqOutStreamBuf outStream;
-
-  outStream.funcTable.Write = MyWrite;
-  outStream.data = dest;
-  outStream.rem = *destLen;
-  outStream.overflow = False;
-
-  p->writeEndMark = False;
-  p->finished = False;
-  p->result = SZ_OK;
-
-  if (reInit)
-    LzmaEnc_Init(p);
-  LzmaEnc_InitPrices(p);
-  nowPos64 = p->nowPos64;
-  RangeEnc_Init(&p->rc);
-  p->rc.outStream = &outStream.funcTable;
-
-  res = LzmaEnc_CodeOneBlock(p, True, desiredPackSize, *unpackSize);
-
-  *unpackSize = (UInt32)(p->nowPos64 - nowPos64);
-  *destLen -= outStream.rem;
-  if (outStream.overflow)
-    return SZ_ERROR_OUTPUT_EOF;
-
-  return res;
-}
-
 static SRes LzmaEnc_Encode2(CLzmaEnc *p, ICompressProgress *progress)
 {
   SRes res = SZ_OK;
@@ -2184,13 +2065,6 @@ static SRes LzmaEnc_Encode2(CLzmaEnc *p,
   return res;
 }
 
-SRes LzmaEnc_Encode(CLzmaEncHandle pp, ISeqOutStream *outStream, ISeqInStream *inStream, ICompressProgress *progress,
-    ISzAlloc *alloc, ISzAlloc *allocBig)
-{
-  RINOK(LzmaEnc_Prepare(pp, outStream, inStream, alloc, allocBig));
-  return LzmaEnc_Encode2((CLzmaEnc *)pp, progress);
-}
-
 SRes LzmaEnc_WriteProperties(CLzmaEncHandle pp, Byte *props, SizeT *size)
 {
   CLzmaEnc *p = (CLzmaEnc *)pp;
@@ -2247,25 +2121,3 @@ SRes LzmaEnc_MemEncode(CLzmaEncHandle pp
     return SZ_ERROR_OUTPUT_EOF;
   return res;
 }
-
-SRes LzmaEncode(Byte *dest, SizeT *destLen, const Byte *src, SizeT srcLen,
-    const CLzmaEncProps *props, Byte *propsEncoded, SizeT *propsSize, int writeEndMark,
-    ICompressProgress *progress, ISzAlloc *alloc, ISzAlloc *allocBig)
-{
-  CLzmaEnc *p = (CLzmaEnc *)LzmaEnc_Create(alloc);
-  SRes res;
-  if (p == 0)
-    return SZ_ERROR_MEM;
-
-  res = LzmaEnc_SetProps(p, props);
-  if (res == SZ_OK)
-  {
-    res = LzmaEnc_WriteProperties(p, propsEncoded, propsSize);
-    if (res == SZ_OK)
-      res = LzmaEnc_MemEncode(p, dest, destLen, src, srcLen,
-          writeEndMark, progress, alloc, allocBig);
-  }
-
-  LzmaEnc_Destroy(p, alloc, allocBig);
-  return res;
-}