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      1 // Copyright 2014 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #ifndef CORE_SRC_FXCODEC_JBIG2_JBIG2_HUFFMANTABLE_H_
      8 #define CORE_SRC_FXCODEC_JBIG2_JBIG2_HUFFMANTABLE_H_
      9 
     10 #include <vector>
     11 
     12 #include "core/include/fxcrt/fx_system.h"
     13 
     14 class CJBig2_BitStream;
     15 struct JBig2TableLine;
     16 
     17 class CJBig2_HuffmanTable {
     18  public:
     19   CJBig2_HuffmanTable(const JBig2TableLine* pTable,
     20                       FX_DWORD nLines,
     21                       bool bHTOOB);
     22 
     23   explicit CJBig2_HuffmanTable(CJBig2_BitStream* pStream);
     24 
     25   ~CJBig2_HuffmanTable();
     26 
     27   bool IsHTOOB() const { return HTOOB; }
     28   FX_DWORD Size() const { return NTEMP; }
     29   const std::vector<int>& GetCODES() const { return CODES; }
     30   const std::vector<int>& GetPREFLEN() const { return PREFLEN; }
     31   const std::vector<int>& GetRANGELEN() const { return RANGELEN; }
     32   const std::vector<int>& GetRANGELOW() const { return RANGELOW; }
     33   bool IsOK() const { return m_bOK; }
     34 
     35  private:
     36   void ParseFromStandardTable(const JBig2TableLine* pTable);
     37   bool ParseFromCodedBuffer(CJBig2_BitStream* pStream);
     38   void InitCodes();
     39   void ExtendBuffers(bool increment);
     40 
     41   bool m_bOK;
     42   bool HTOOB;
     43   FX_DWORD NTEMP;
     44   std::vector<int> CODES;
     45   std::vector<int> PREFLEN;
     46   std::vector<int> RANGELEN;
     47   std::vector<int> RANGELOW;
     48 };
     49 
     50 #endif  // CORE_SRC_FXCODEC_JBIG2_JBIG2_HUFFMANTABLE_H_
     51