4.27 beta

7zip/Compress/Rar29/Original/getbits.hpp

@@ -0,0 +1,37 @@
+#ifndef _RAR_GETBITS_
+#define _RAR_GETBITS_
+
+class BitInput
+{
+  public:
+    enum BufferSize {MAX_SIZE=0x8000};
+  protected:
+    int InAddr,InBit;
+  public:
+    BitInput();
+    ~BitInput();
+
+    byte *InBuf;
+
+    void InitBitInput()
+    {
+      InAddr=InBit=0;
+    }
+    void addbits(int Bits)
+    {
+      Bits+=InBit;
+      InAddr+=Bits>>3;
+      InBit=Bits&7;
+    }
+    unsigned int getbits()
+    {
+      unsigned int BitField=(uint)InBuf[InAddr] << 16;
+      BitField|=(uint)InBuf[InAddr+1] << 8;
+      BitField|=(uint)InBuf[InAddr+2];
+      BitField >>= (8-InBit);
+      return(BitField & 0xffff);
+    }
+    void faddbits(int Bits);
+    unsigned int fgetbits();
+};
+#endif