4.63

CPP/7zip/Compress/ArjDecoder1.h

@@ -0,0 +1,98 @@
+// ArjDecoder1.h
+
+#ifndef __COMPRESS_ARJ_DECODER1_H
+#define __COMPRESS_ARJ_DECODER1_H
+
+#include "../../Common/MyCom.h"
+
+#include "../ICoder.h"
+
+#include "../Common/InBuffer.h"
+
+#include "BitmDecoder.h"
+#include "LzOutWindow.h"
+
+namespace NCompress {
+namespace NArj {
+namespace NDecoder1 {
+
+#define CODE_BIT          16
+
+#define THRESHOLD    3
+#define DDICSIZ      26624
+#define MAXDICBIT   16
+#define MATCHBIT     8
+#define MAXMATCH   256
+#define NC          (0xFF + MAXMATCH + 2 - THRESHOLD)
+#define NP          (MAXDICBIT + 1)
+#define CBIT         9
+#define NT          (CODE_BIT + 3)
+#define PBIT         5
+#define TBIT         5
+
+#if NT > NP
+#define NPT NT
+#else
+#define NPT NP
+#endif
+
+#define CTABLESIZE  4096
+#define PTABLESIZE   256
+
+
+class CCoder :
+  public ICompressCoder,
+  public CMyUnknownImp
+{
+  CLzOutWindow m_OutWindowStream;
+  NBitm::CDecoder<CInBuffer> m_InBitStream;
+
+  UInt32 left[2 * NC - 1];
+  UInt32 right[2 * NC - 1];
+  Byte c_len[NC];
+  Byte pt_len[NPT];
+
+  UInt32 c_table[CTABLESIZE];
+  UInt32 pt_table[PTABLESIZE];
+  
+  void ReleaseStreams()
+  {
+    m_OutWindowStream.ReleaseStream();
+    m_InBitStream.ReleaseStream();
+  }
+
+  class CCoderReleaser
+  {
+    CCoder *m_Coder;
+  public:
+    bool NeedFlush;
+    CCoderReleaser(CCoder *coder): m_Coder(coder), NeedFlush(true) {}
+    ~CCoderReleaser()
+    {
+      if (NeedFlush)
+        m_Coder->m_OutWindowStream.Flush();
+      m_Coder->ReleaseStreams();
+    }
+  };
+  friend class CCoderReleaser;
+
+  void MakeTable(int nchar, Byte *bitlen, int tablebits, UInt32 *table, int tablesize);
+  
+  void read_c_len();
+  void read_pt_len(int nn, int nbit, int i_special);
+  UInt32 decode_c();
+  UInt32 decode_p();
+
+  HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
+      const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
+public:
+  MY_UNKNOWN_IMP
+
+  STDMETHOD(Code)(ISequentialInStream *inStream, ISequentialOutStream *outStream,
+      const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
+
+};
+
+}}}
+
+#endif