#ifndef _SINODETECT_H
#define _SINODETECT_H

#include <stdio.h>

/*
   SinoDetect
   C++ class to detect encoding of an unsigned char* array
   Works for 
     Chinese:  GB, GBK, HZ, Big5, Big5+, EUC-TW, ISO 2022-CN
     Korean:   EUC-KR, Cp949, ISO 2022-KR
     Japanese: EUC-JP, SJIS, ISO 2022-JP
     General:  UTF-8, UTF-16
   Written by Erik Peterson, [email protected]
   Last update July, 2006
   License fee required for commercial use
*/

class SinoDetect {

public:
  enum Encodings { GB2312, GBK, GB18030, HZ,
		   BIG5, BIG5PLUS, EUC_TW, ISO_2022_CN, 
		   EUC_KR, CP949, ISO_2022_KR, JOHAB,
		   EUC_JP, SJIS, ISO_2022_JP,
		   UTF8, UTF16, 
		   ASCII, OTHER, TOTAL_ENCODINGS };

  SinoDetect();
  
  int detect_encoding(unsigned char* rawtext);
  //  int detect_encoding(FILE *srcfile);
  
 private:
  
  // Frequency tables to hold the GB, Big5, and EUC-TW character
  // frequencies
  int GBFreq[94][94];
  int GBKFreq[126][191];
  int Big5Freq[94][158];
  int Big5PFreq[126][191];
  int EUC_TWFreq[94][94];
  int KRFreq[94][94];
  int JPFreq[94][94];
  
  //int UnicodeFreq[94][128];
  
  void initialize_frequencies();
  
  int gb2312_probability(unsigned char* rawtext);
  int gbk_probability(unsigned char* rawtext);
  int gb18030_probability(unsigned char* rawtext);
  int hz_probability(unsigned char* rawtext);
  int big5_probability(unsigned char* rawtext);
  int big5plus_probability(unsigned char* rawtext);
  int euc_tw_probability(unsigned char* rawtext);
  int iso_2022_cn_probability(unsigned char* rawtext);
  int utf8_probability(unsigned char* rawtext);
  int utf16_probability(unsigned char* rawtext);
  int ascii_probability(unsigned char* rawtext);
  int euc_kr_probability(unsigned char* rawtext);
  int cp949_probability(unsigned char* rawtext);
  int iso_2022_kr_probability(unsigned char* rawtext);
  int sjis_probability(unsigned char* rawtext);
  int euc_jp_probability(unsigned char* rawtext);
  int iso_2022_jp_probability(unsigned char* rawtext);

};


#endif