From 71478fd62d8483483abb34609cdabb7f9cbadfd6 Mon Sep 17 00:00:00 2001
From: root <root@lamia.panaceas.james.local>
Date: Sat, 19 Dec 2015 14:18:43 +0000
Subject: Add hostTools from https://github.com/Noltari/cfe_bcm63xx

---
 hostTools/lzma/decompress/LiteralCoder.h | 146 +++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 hostTools/lzma/decompress/LiteralCoder.h

(limited to 'hostTools/lzma/decompress/LiteralCoder.h')

diff --git a/hostTools/lzma/decompress/LiteralCoder.h b/hostTools/lzma/decompress/LiteralCoder.h
new file mode 100644
index 0000000..2b1670d
--- /dev/null
+++ b/hostTools/lzma/decompress/LiteralCoder.h
@@ -0,0 +1,146 @@
+#ifndef __LITERALCODER_H
+#define __LITERALCODER_H
+
+#include "AriBitCoder.h"
+#include "RCDefs.h"
+
+//BRCM modification start
+#ifdef _HOST_TOOL
+#include "stdio.h"
+#include "malloc.h" 
+#endif
+
+#ifdef _CFE_
+#include "lib_malloc.h"
+#include "lib_printf.h"
+#define malloc(x) KMALLOC(x, 0)
+#define free(x) KFREE(x)
+#endif
+
+#ifdef __KERNEL__
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#define printf  printk
+//#define malloc(x)  kmalloc(x,GFP_KERNEL)
+#define malloc(x)  vmalloc(x)
+#define free(x) vfree(x)
+#endif
+//BRCM modification end
+
+//#define kNumMoveBits 5
+
+typedef struct LitDecoder2
+{
+  CBitDecoder m_Decoders[3][1 << 8];
+} LitDecoder2;
+
+
+INLINE void LitDecoder2Init(LitDecoder2 *litDecoder2)
+  {
+    int i, j;
+    for (i = 0; i < 3; i++)
+      for (j = 1; j < (1 << 8); j++)
+        BitDecoderInit(&litDecoder2->m_Decoders[i][j]);
+  }
+
+INLINE BYTE LitDecoder2DecodeNormal(ISequentialInStream *in_stream, LitDecoder2 *litDecoder2, CRangeDecoder *aRangeDecoder)
+  {
+    UINT32 aSymbol = 1;
+    UINT32 aRange = aRangeDecoder->m_Range;
+    UINT32 aCode = aRangeDecoder->m_Code;        
+    do
+    {
+      RC_GETBIT(kNumMoveBits, litDecoder2->m_Decoders[0][aSymbol], aSymbol)
+    }
+    while (aSymbol < 0x100);
+    aRangeDecoder->m_Range = aRange;
+    aRangeDecoder->m_Code = aCode;
+    return aSymbol;
+  }
+
+INLINE BYTE LitDecoder2DecodeWithMatchByte(ISequentialInStream *in_stream, LitDecoder2 *litDecoder2, CRangeDecoder *aRangeDecoder, BYTE aMatchByte)
+  {
+    UINT32 aSymbol = 1;
+    UINT32 aRange = aRangeDecoder->m_Range;
+    UINT32 aCode = aRangeDecoder->m_Code;        
+    do
+    {
+      UINT32 aBit;
+      UINT32 aMatchBit = (aMatchByte >> 7) & 1;
+      aMatchByte <<= 1;
+      RC_GETBIT2(kNumMoveBits, litDecoder2->m_Decoders[1 + aMatchBit][aSymbol], aSymbol, 
+          aBit = 0, aBit = 1)
+      if (aMatchBit != aBit)
+      {
+        while (aSymbol < 0x100)
+        {
+          RC_GETBIT(kNumMoveBits, litDecoder2->m_Decoders[0][aSymbol], aSymbol)
+        }
+        break;
+      }
+    }
+    while (aSymbol < 0x100);
+    aRangeDecoder->m_Range = aRange;
+    aRangeDecoder->m_Code = aCode;
+    return aSymbol;
+  }
+
+
+typedef struct LitDecoder
+{
+  LitDecoder2 *m_Coders;
+  UINT32 m_NumPrevBits;
+  UINT32 m_NumPosBits;
+  UINT32 m_PosMask;
+} LitDecoder;
+
+
+//  LitDecoder(): m_Coders(0) {}
+//  ~LitDecoder()  { Free(); }
+
+/*
+INLINE void LitDecoderFree(LitDecoder *litDecoder)
+  { 
+    free( (char *) litDecoder->m_Coders );
+    litDecoder->m_Coders = 0;
+  }
+*/
+
+INLINE void LitDecoderCreate(LitDecoder *litDecoder, UINT32 aNumPosBits, UINT32 aNumPrevBits)
+  {
+//    LitDecoderFree(litDecoder);
+    UINT32 aNumStates;
+    litDecoder->m_NumPosBits = aNumPosBits;
+    litDecoder->m_PosMask = (1 << aNumPosBits) - 1;
+    litDecoder->m_NumPrevBits = aNumPrevBits;
+    aNumStates = 1 << (aNumPrevBits + aNumPosBits);
+    litDecoder->m_Coders = (LitDecoder2*) malloc( sizeof( LitDecoder2 ) * aNumStates );
+    //printf("malloc in LitDecoderCreate=%d\n",sizeof( LitDecoder2 ) * aNumStates);
+    if (litDecoder->m_Coders == 0)
+        printf( "Error allocating memory for LitDecoder m_Coders!\n" );
+  }
+
+INLINE void LitDecoderInit(LitDecoder *litDecoder)
+  {
+    UINT32 i;
+    UINT32 aNumStates = 1 << (litDecoder->m_NumPrevBits + litDecoder->m_NumPosBits);
+    for (i = 0; i < aNumStates; i++)
+      LitDecoder2Init(&litDecoder->m_Coders[i]);
+  }
+
+INLINE UINT32 LitDecoderGetState(LitDecoder *litDecoder, UINT32 aPos, BYTE aPrevByte)
+  { 
+    return ((aPos & litDecoder->m_PosMask) << litDecoder->m_NumPrevBits) + (aPrevByte >> (8 - litDecoder->m_NumPrevBits)); 
+  }
+
+INLINE BYTE LitDecodeNormal(ISequentialInStream *in_stream, LitDecoder *litDecoder, CRangeDecoder *aRangeDecoder, UINT32 aPos, BYTE aPrevByte)
+  { 
+    return LitDecoder2DecodeNormal(in_stream, &litDecoder->m_Coders[LitDecoderGetState(litDecoder, aPos, aPrevByte)], aRangeDecoder); 
+  }
+
+INLINE BYTE LitDecodeWithMatchByte(ISequentialInStream *in_stream, LitDecoder *litDecoder, CRangeDecoder *aRangeDecoder, UINT32 aPos, BYTE aPrevByte, BYTE aMatchByte)
+  { 
+      return LitDecoder2DecodeWithMatchByte(in_stream, &litDecoder->m_Coders[LitDecoderGetState(litDecoder, aPos, aPrevByte)], aRangeDecoder, aMatchByte); 
+  }
+
+#endif
-- 
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