File indexing completed on 2023-09-24 04:06:32

 /*
  * This file is part of the KDE libraries
  *
  * Copyright 2000-2003 Shiro Kawai <shiro@acm.org>, All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  *  1. Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  *
  *  2. Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  *  3. Neither the name of the authors nor the names of its contributors
  *     may be used to endorse or promote products derived from this
  *     software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 /*
  * original code is here.
  * http://cvs.sourceforge.net/viewcvs.py/gauche/Gauche/ext/charconv/guess.c?view=markup
  */
 #ifndef GUESS_JA_H
 #define GUESS_JA_H
 
 #include <qglobal.h>
 #ifdef Q_OS_WIN
 #undef UNICODE
 #endif
 #ifdef SOLARIS
 #undef UNICODE
 #endif
 namespace khtml
 {
 class guess_arc
 {
 public:
     unsigned int next;          /* next state */
     double score;               /* score */
 };
 }
 
 using namespace khtml;
 
 typedef signed char dfa_table[256];
 
 /* DFA tables declared in guess_ja.cpp */
 extern const dfa_table guess_eucj_st[];
 extern guess_arc guess_eucj_ar[7];
 extern const dfa_table guess_sjis_st[];
 extern guess_arc guess_sjis_ar[6];
 extern const dfa_table guess_utf8_st[];
 extern guess_arc guess_utf8_ar[11];
 
 namespace khtml
 {
 
 class guess_dfa
 {
 public:
     const dfa_table *states;
     const guess_arc *arcs;
     int state;
     double score;
 
     guess_dfa(const dfa_table stable[], const guess_arc *atable) :
         states(stable), arcs(atable)
     {
         state = 0;
         score = 1.0;
     }
 };
 
 class JapaneseCode
 {
 public:
     enum Type {ASCII, JIS, EUC, SJIS, UNICODE, UTF8 };
     enum Type guess_jp(const char *buf, int buflen);
 
     JapaneseCode()
     {
         eucj = new guess_dfa(guess_eucj_st, guess_eucj_ar);
         sjis = new guess_dfa(guess_sjis_st, guess_sjis_ar);
         utf8 = new guess_dfa(guess_utf8_st, guess_utf8_ar);
         last_JIS_escape = false;
     }
 
     ~JapaneseCode()
     {
         delete eucj;
         delete sjis;
         delete utf8;
     }
 
 protected:
     guess_dfa *eucj;
     guess_dfa *sjis;
     guess_dfa *utf8;
 
     bool last_JIS_escape;
 };
 }
 
 #define DFA_NEXT(dfa, ch)                               \
     do {                                                \
         int arc__;                                      \
         if (dfa->state >= 0) {                          \
             arc__ = dfa->states[dfa->state][ch];        \
             if (arc__ < 0) {                            \
                 dfa->state = -1;                        \
             } else {                                    \
                 dfa->state = dfa->arcs[arc__].next;     \
                 dfa->score *= dfa->arcs[arc__].score;   \
             }                                           \
         }                                               \
     } while (0)
 
 #define DFA_ALIVE(dfa)  (dfa->state >= 0)
 
 #endif  /* GUESS_JA_H */