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Diffstat (limited to 'khtml/misc/guess_ja.h')
| -rw-r--r-- | khtml/misc/guess_ja.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/khtml/misc/guess_ja.h b/khtml/misc/guess_ja.h new file mode 100644 index 000000000..9dee907e6 --- /dev/null +++ b/khtml/misc/guess_ja.h @@ -0,0 +1,122 @@ +/* + * This file is part of the KDE libraries + * + * Copyright (c) 2000-2003 Shiro Kawai, 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 + +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 () { + if (eucj) delete eucj; + if (sjis) delete sjis; + if (utf8) 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 */ |