1 files changed, 24 insertions, 0 deletions
diff --git a/lib/UnrarXLib/coder.hpp b/lib/UnrarXLib/coder.hpp
new file mode 100644
index 0000000000..f09f911c09
--- /dev/null
+++ b/lib/UnrarXLib/coder.hpp
@@ -0,0 +1,24 @@
+/****************************************************************************
+ *  Contents: 'Carryless rangecoder' by Dmitry Subbotin                     *
+ ****************************************************************************/
+
+const uint TOP=1 << 24, BOT=1 << 15;
+
+class RangeCoder
+{
+  public:
+    void InitDecoder(Unpack *UnpackRead);
+    inline int GetCurrentCount();
+    inline uint GetCurrentShiftCount(uint SHIFT);
+    inline void Decode();
+    inline void PutChar(unsigned int c);
+    inline unsigned int GetChar();
+
+    uint low, code, range;
+    struct SUBRANGE 
+    {
+      uint LowCount, HighCount, scale;
+    } SubRange;
+
+    Unpack *UnpackRead;
+};