3.13

7zip/Compress/LZMA/LZMALen.cpp

@@ -0,0 +1,74 @@
+// LZMALen.cpp
+
+#include "StdAfx.h"
+
+#include "LZMALen.h"
+
+namespace NCompress {
+namespace NLZMA {
+namespace NLength {
+
+void CEncoder::Init()
+{
+  _choice.Init();
+  for (UINT32 posState = 0; posState < _numPosStates; posState++)
+  {
+    _lowCoder[posState].Init();
+    _midCoder[posState].Init();
+  }
+  _choice2.Init();
+  _highCoder.Init();
+}
+
+void CEncoder::Encode(NRangeCoder::CEncoder *rangeEncoder, UINT32 symbol, UINT32 posState)
+{
+  if(symbol < kNumLowSymbols)
+  {
+    _choice.Encode(rangeEncoder, 0);
+    _lowCoder[posState].Encode(rangeEncoder, symbol);
+  }
+  else
+  {
+    symbol -= kNumLowSymbols;
+    _choice.Encode(rangeEncoder, 1);
+    if(symbol < kNumMidSymbols)
+    {
+      _choice2.Encode(rangeEncoder, 0);
+      _midCoder[posState].Encode(rangeEncoder, symbol);
+    }
+    else
+    {
+      _choice2.Encode(rangeEncoder, 1);
+      _highCoder.Encode(rangeEncoder, symbol - kNumMidSymbols);
+    }
+  }
+}
+
+UINT32 CEncoder::GetPrice(UINT32 symbol, UINT32 posState) const
+{
+  UINT32 price = 0;
+  if(symbol < kNumLowSymbols)
+  {
+    price += _choice.GetPrice(0);
+    price += _lowCoder[posState].GetPrice(symbol);
+  }
+  else
+  {
+    symbol -= kNumLowSymbols;
+    price += _choice.GetPrice(1);
+    if(symbol < kNumMidSymbols)
+    {
+      price += _choice2.GetPrice(0);
+      price += _midCoder[posState].GetPrice(symbol);
+    }
+    else
+    {
+      price += _choice2.GetPrice(1);
+      price += _highCoder.GetPrice(symbol - kNumMidSymbols);
+    }
+  }
+  return price;
+}
+
+}}}
+