683 lines
15 KiB
C
683 lines
15 KiB
C
/*
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* Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
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* Copyright (C) 1999,2000 Hiroyuki Yamamoto
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <glib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include "html.h"
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#include "codeconv.h"
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#include "utils.h"
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#define HTMLBUFSIZE 8192
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#define HR_STR "------------------------------------------------"
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typedef struct _HTMLSymbol HTMLSymbol;
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struct _HTMLSymbol
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{
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gchar *const key;
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gchar *const val;
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};
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static HTMLSymbol symbol_list[] = {
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{"<" , "<"},
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{">" , ">"},
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{"&" , "&"},
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{""" , "\""},
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{" " , " "},
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{"™" , "(TM)"},
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{"™", "(TM)"},
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};
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static HTMLSymbol ascii_symbol_list[] = {
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{"¡" , "^!"},
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{"¦", "|"},
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{"©" , "(C)"},
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{"«" , "<<"},
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{"®" , "(R)"},
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{"²" , "^2"},
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{"³" , "^3"},
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{"´" , "'"},
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{"¸" , ","},
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{"¹" , "^1"},
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{"»" , ">>"},
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{"¼", "1/4"},
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{"½", "1/2"},
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{"¾", "3/4"},
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{"¿", "^?"},
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{"À", "A`"},
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{"Á", "A'"},
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{"Â" , "A^"},
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{"Ã", "A~"},
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{"Æ" , "AE"},
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{"È", "E`"},
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{"É", "E'"},
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{"Ê" , "E^"},
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{"Ì", "I`"},
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{"Í", "I'"},
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{"Î" , "I^"},
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{"Ñ", "N~"},
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{"Ò", "O`"},
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{"Ó", "O'"},
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{"Ô" , "O^"},
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{"Õ", "O~"},
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{"Ù", "U`"},
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{"Ú", "U'"},
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{"Û" , "U^"},
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{"Ý", "Y'"},
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{"à", "a`"},
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{"á", "a'"},
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{"â" , "a^"},
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{"ã", "a~"},
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{"æ" , "ae"},
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{"è", "e`"},
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{"é", "e'"},
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{"ê" , "e^"},
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{"ì", "i`"},
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{"í", "i'"},
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{"î" , "i^"},
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{"ñ", "n~"},
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{"ò", "o`"},
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{"ó", "o'"},
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{"ô" , "o^"},
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{"õ", "o~"},
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{"ù", "u`"},
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{"ú", "u'"},
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{"û" , "u^"},
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{"ý", "y'"},
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};
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static HTMLSymbol eucjp_symbol_list[] = {
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{"¡" , "^!"},
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{"¢" , "\xa1\xf1"},
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{"£" , "\xa1\xf2"},
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{"¥" , "\xa1\xef"},
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{"¦", "|"},
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{"§" , "\xa1\xf8"},
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{"¨" , "\xa1\xaf"},
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{"©" , "(C)"},
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{"«" , "<<"},
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{"®" , "(R)"},
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{"°" , "\xa1\xeb"},
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{"±", "\xa1\xde"},
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{"²" , "^2"},
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{"³" , "^3"},
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{"´" , "'"},
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{"µ" , "\xa6\xcc"},
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{"¶" , "\xa2\xf9"},
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{"·", "\xa1\xa6"},
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{"¸" , ","},
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{"¹" , "^1"},
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{"»" , ">>"},
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{"¼", "1/4"},
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{"½", "1/2"},
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{"¾", "3/4"},
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{"¿", "^?"},
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{"À", "A`"},
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{"Á", "A'"},
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{"Â" , "A^"},
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{"Ã", "A~"},
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{"Ä" , "A\xa1\xaf"},
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{"Å" , "A\xa1\xeb"},
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{"Æ" , "AE"},
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{"È", "E`"},
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{"É", "E'"},
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{"Ê" , "E^"},
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{"Ë" , "E\xa1\xaf"},
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{"Ì", "I`"},
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{"Í", "I'"},
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{"Î" , "I^"},
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{"Ï" , "I\xa1\xaf"},
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{"Ñ", "N~"},
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{"Ò", "O`"},
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{"Ó", "O'"},
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{"Ô" , "O^"},
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{"Õ", "O~"},
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{"Ö" , "O\xa1\xaf"},
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{"×" , "\xa1\xdf"},
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{"Ù", "U`"},
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{"Ú", "U'"},
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{"Û" , "U^"},
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{"Ü" , "U\xa1\xaf"},
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{"Ý", "Y'"},
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{"à", "a`"},
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{"á", "a'"},
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{"â" , "a^"},
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{"ã", "a~"},
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{"ä" , "a\xa1\xaf"},
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{"å" , "a\xa1\xeb"},
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{"æ" , "ae"},
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{"è", "e`"},
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{"é", "e'"},
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{"ê" , "e^"},
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{"ë" , "e\xa1\xaf"},
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{"ì", "i`"},
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{"í", "i'"},
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{"î" , "i^"},
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{"ï" , "i\xa1\xaf"},
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{"ð" , "\xa2\xdf"},
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{"ñ", "n~"},
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{"ò", "o`"},
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{"ó", "o'"},
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{"ô" , "o^"},
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{"õ", "o~"},
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{"ö" , "o\xa1\xaf"},
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{"÷", "\xa1\xe0"},
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{"ù", "u`"},
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{"ú", "u'"},
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{"û" , "u^"},
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{"ü" , "u\xa1\xaf"},
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{"ý", "y'"},
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{"ÿ" , "y\xa1\xaf"},
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};
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static HTMLSymbol latin_symbol_list[] = {
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{"¡" , "\xa1"},
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{"¢" , "\xa2"},
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{"£" , "\xa3"},
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{"¤", "\xa4"},
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{"¥" , "\xa5"},
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{"¦", "\xa6"},
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{"§" , "\xa7"},
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{"¨" , "\xa8"},
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{"©" , "\xa9"},
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{"ª" , "\xaa"},
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{"«" , "\xab"},
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{"¬" , "\xac"},
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{"­" , "\xad"},
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{"®" , "\xae"},
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{"¯" , "\xaf"},
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{"°" , "\xb0"},
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{"±", "\xb1"},
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{"²" , "\xb2"},
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{"³" , "\xb3"},
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{"´" , "\xb4"},
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{"µ" , "\xb5"},
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{"¶" , "\xb6"},
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{"·", "\xb7"},
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{"¸" , "\xb8"},
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{"¹" , "\xb9"},
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{"º" , "\xba"},
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{"»" , "\xbb"},
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{"¼", "\xbc"},
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{"½", "\xbd"},
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{"¾", "\xbe"},
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{"¿", "\xbf"},
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{"À", "\xc0"},
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{"Á", "\xc1"},
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{"Â" , "\xc2"},
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{"Ã", "\xc3"},
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{"Ä" , "\xc4"},
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{"Å" , "\xc5"},
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{"Æ" , "\xc6"},
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{"Ç", "\xc7"},
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{"È", "\xc8"},
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{"É", "\xc9"},
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{"Ê" , "\xca"},
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{"Ë" , "\xcb"},
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{"Ì", "\xcc"},
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{"Í", "\xcd"},
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{"Î" , "\xce"},
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{"Ï" , "\xcf"},
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{"Ð" , "\xd0"},
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{"Ñ", "\xd1"},
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{"Ò", "\xd2"},
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{"Ó", "\xd3"},
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{"Ô" , "\xd4"},
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{"Õ", "\xd5"},
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{"Ö" , "\xd6"},
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{"×" , "\xd7"},
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{"Ø", "\xd8"},
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{"Ù", "\xd9"},
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{"Ú", "\xda"},
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{"Û" , "\xdb"},
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{"Ü" , "\xdc"},
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{"Ý", "\xdd"},
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{"Þ" , "\xde"},
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{"ß" , "\xdf"},
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{"à", "\xe0"},
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{"á", "\xe1"},
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{"â" , "\xe2"},
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{"ã", "\xe3"},
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{"ä" , "\xe4"},
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{"å" , "\xe5"},
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{"æ" , "\xe6"},
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{"ç", "\xe7"},
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{"è", "\xe8"},
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{"é", "\xe9"},
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{"ê" , "\xea"},
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{"ë" , "\xeb"},
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{"ì", "\xec"},
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{"í", "\xed"},
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{"î" , "\xee"},
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{"ï" , "\xef"},
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{"ð" , "\xf0"},
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{"ñ", "\xf1"},
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{"ò", "\xf2"},
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{"ó", "\xf3"},
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{"ô" , "\xf4"},
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{"õ", "\xf5"},
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{"ö" , "\xf6"},
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{"÷", "\xf7"},
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{"ø", "\xf8"},
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{"ù", "\xf9"},
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{"ú", "\xfa"},
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{"û" , "\xfb"},
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{"ü" , "\xfc"},
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{"ý", "\xfd"},
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{"þ" , "\xfe"},
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{"ÿ" , "\xff"},
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};
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static GHashTable *default_symbol_table;
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static GHashTable *eucjp_symbol_table;
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static GHashTable *latin_symbol_table;
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static HTMLState html_read_line (HTMLParser *parser);
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static void html_append_char (HTMLParser *parser,
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gchar ch);
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static void html_append_str (HTMLParser *parser,
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const gchar *str,
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gint len);
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static HTMLState html_parse_tag (HTMLParser *parser);
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static void html_parse_special (HTMLParser *parser);
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static void html_get_parenthesis (HTMLParser *parser,
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gchar *buf,
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gint len);
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#if 0
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static gint g_str_case_equal (gconstpointer v,
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gconstpointer v2);
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static guint g_str_case_hash (gconstpointer key);
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#endif
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HTMLParser *html_parser_new(FILE *fp, CodeConverter *conv)
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{
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HTMLParser *parser;
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g_return_val_if_fail(fp != NULL, NULL);
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g_return_val_if_fail(conv != NULL, NULL);
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parser = g_new0(HTMLParser, 1);
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parser->fp = fp;
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parser->conv = conv;
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parser->str = g_string_new(NULL);
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parser->buf = g_string_new(NULL);
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parser->bufp = parser->buf->str;
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parser->newline = TRUE;
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parser->empty_line = TRUE;
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parser->space = FALSE;
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parser->pre = FALSE;
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#define SYMBOL_TABLE_ADD(table, list) \
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{ \
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gint i; \
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\
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for (i = 0; i < sizeof(list) / sizeof(list[0]); i++) \
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g_hash_table_insert(table, list[i].key, list[i].val); \
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}
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if (!default_symbol_table) {
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default_symbol_table =
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g_hash_table_new(g_str_hash, g_str_equal);
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SYMBOL_TABLE_ADD(default_symbol_table, symbol_list);
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SYMBOL_TABLE_ADD(default_symbol_table, ascii_symbol_list);
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}
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if (!eucjp_symbol_table) {
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eucjp_symbol_table =
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g_hash_table_new(g_str_hash, g_str_equal);
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SYMBOL_TABLE_ADD(eucjp_symbol_table, symbol_list);
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SYMBOL_TABLE_ADD(eucjp_symbol_table, eucjp_symbol_list);
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}
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if (!latin_symbol_table) {
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latin_symbol_table =
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g_hash_table_new(g_str_hash, g_str_equal);
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SYMBOL_TABLE_ADD(latin_symbol_table, symbol_list);
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SYMBOL_TABLE_ADD(latin_symbol_table, latin_symbol_list);
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}
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#undef SYMBOL_TABLE_ADD
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if (conv->charset == C_ISO_8859_1)
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parser->symbol_table = latin_symbol_table;
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else if ((conv->charset == C_ISO_2022_JP ||
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conv->charset == C_ISO_2022_JP_2 ||
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conv->charset == C_EUC_JP ||
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conv->charset == C_SHIFT_JIS) &&
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conv_get_current_charset() == C_EUC_JP)
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parser->symbol_table = eucjp_symbol_table;
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else
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parser->symbol_table = default_symbol_table;
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return parser;
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}
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void html_parser_destroy(HTMLParser *parser)
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{
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g_string_free(parser->str, TRUE);
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g_string_free(parser->buf, TRUE);
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g_free(parser);
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}
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gchar *html_parse(HTMLParser *parser)
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{
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parser->state = HTML_NORMAL;
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g_string_truncate(parser->str, 0);
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if (*parser->bufp == '\0') {
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g_string_truncate(parser->buf, 0);
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parser->bufp = parser->buf->str;
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if (html_read_line(parser) == HTML_EOF)
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return NULL;
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}
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while (*parser->bufp != '\0') {
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switch (*parser->bufp) {
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case '<':
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if (parser->str->len == 0)
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html_parse_tag(parser);
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else
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return parser->str->str;
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break;
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case '&':
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html_parse_special(parser);
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break;
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case ' ':
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case '\t':
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case '\r':
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case '\n':
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if (parser->bufp[0] == '\r' && parser->bufp[1] == '\n')
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parser->bufp++;
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if (!parser->pre) {
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if (!parser->newline)
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parser->space = TRUE;
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parser->bufp++;
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break;
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}
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/* fallthrough */
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default:
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html_append_char(parser, *parser->bufp++);
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}
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}
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return parser->str->str;
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}
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static HTMLState html_read_line(HTMLParser *parser)
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{
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gchar buf[HTMLBUFSIZE];
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gchar buf2[HTMLBUFSIZE];
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gint index;
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if (fgets(buf, sizeof(buf), parser->fp) == NULL) {
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parser->state = HTML_EOF;
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return HTML_EOF;
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}
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if (conv_convert(parser->conv, buf2, sizeof(buf2), buf) < 0) {
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g_warning("html_read_line(): code conversion failed\n");
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index = parser->bufp - parser->buf->str;
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g_string_append(parser->buf, buf);
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parser->bufp = parser->buf->str + index;
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return HTML_ERR;
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}
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index = parser->bufp - parser->buf->str;
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g_string_append(parser->buf, buf2);
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parser->bufp = parser->buf->str + index;
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return HTML_NORMAL;
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}
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static void html_append_char(HTMLParser *parser, gchar ch)
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{
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GString *str = parser->str;
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if (!parser->pre && parser->space) {
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g_string_append_c(str, ' ');
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parser->space = FALSE;
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}
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g_string_append_c(str, ch);
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parser->empty_line = FALSE;
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if (ch == '\n') {
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parser->newline = TRUE;
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if (str->len > 1 && str->str[str->len - 2] == '\n')
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parser->empty_line = TRUE;
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} else
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parser->newline = FALSE;
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}
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static void html_append_str(HTMLParser *parser, const gchar *str, gint len)
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{
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GString *string = parser->str;
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if (!parser->pre && parser->space) {
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g_string_append_c(string, ' ');
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parser->space = FALSE;
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}
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if (len == 0) return;
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if (len < 0)
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g_string_append(string, str);
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else {
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gchar *s;
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Xstrndup_a(s, str, len, return);
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g_string_append(string, s);
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}
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parser->empty_line = FALSE;
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if (string->len > 0 && string->str[string->len - 1] == '\n') {
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parser->newline = TRUE;
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if (string->len > 1 && string->str[string->len - 2] == '\n')
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parser->empty_line = TRUE;
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} else
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parser->newline = FALSE;
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}
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static HTMLState html_parse_tag(HTMLParser *parser)
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{
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gchar buf[HTMLBUFSIZE];
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gchar *p;
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html_get_parenthesis(parser, buf, sizeof(buf));
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for (p = buf; *p != '\0'; p++) {
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if (isspace(*p)) {
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*p = '\0';
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break;
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}
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}
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parser->state = HTML_UNKNOWN;
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if (buf[0] == '\0') return parser->state;
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g_strdown(buf);
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if (!strcmp(buf, "br")) {
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parser->space = FALSE;
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html_append_char(parser, '\n');
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parser->state = HTML_BR;
|
|
} else if (!strcmp(buf, "p")) {
|
|
parser->space = FALSE;
|
|
if (!parser->empty_line) {
|
|
parser->space = FALSE;
|
|
if (!parser->newline) html_append_char(parser, '\n');
|
|
html_append_char(parser, '\n');
|
|
}
|
|
parser->state = HTML_PAR;
|
|
} else if (!strcmp(buf, "pre")) {
|
|
parser->pre = TRUE;
|
|
parser->state = HTML_PRE;
|
|
} else if (!strcmp(buf, "/pre")) {
|
|
parser->pre = FALSE;
|
|
parser->state = HTML_NORMAL;
|
|
} else if (!strcmp(buf, "hr")) {
|
|
if (!parser->newline) {
|
|
parser->space = FALSE;
|
|
html_append_char(parser, '\n');
|
|
}
|
|
html_append_str(parser, HR_STR "\n", -1);
|
|
parser->state = HTML_HR;
|
|
} else if (!strcmp(buf, "div") ||
|
|
!strcmp(buf, "ul") ||
|
|
!strcmp(buf, "li") ||
|
|
!strcmp(buf, "table") ||
|
|
!strcmp(buf, "tr") ||
|
|
(buf[0] == 'h' && isdigit(buf[1]))) {
|
|
if (!parser->newline) {
|
|
parser->space = FALSE;
|
|
html_append_char(parser, '\n');
|
|
}
|
|
parser->state = HTML_NORMAL;
|
|
} else if (!strcmp(buf, "/table") ||
|
|
(buf[0] == '/' && buf[1] == 'h' && isdigit(buf[1]))) {
|
|
if (!parser->empty_line) {
|
|
parser->space = FALSE;
|
|
if (!parser->newline) html_append_char(parser, '\n');
|
|
html_append_char(parser, '\n');
|
|
}
|
|
parser->state = HTML_NORMAL;
|
|
} else if (!strcmp(buf, "/div") ||
|
|
!strcmp(buf, "/ul") ||
|
|
!strcmp(buf, "/li")) {
|
|
if (!parser->newline) {
|
|
parser->space = FALSE;
|
|
html_append_char(parser, '\n');
|
|
}
|
|
parser->state = HTML_NORMAL;
|
|
}
|
|
|
|
return parser->state;
|
|
}
|
|
|
|
static void html_parse_special(HTMLParser *parser)
|
|
{
|
|
gchar symbol_name[9];
|
|
gint n;
|
|
const gchar *val;
|
|
|
|
parser->state = HTML_UNKNOWN;
|
|
g_return_if_fail(*parser->bufp == '&');
|
|
|
|
/* &foo; */
|
|
for (n = 0; parser->bufp[n] != '\0' && parser->bufp[n] != ';'; n++)
|
|
;
|
|
if (n > 7 || parser->bufp[n] != ';') {
|
|
/* output literal `&' */
|
|
html_append_char(parser, *parser->bufp++);
|
|
parser->state = HTML_NORMAL;
|
|
return;
|
|
}
|
|
strncpy2(symbol_name, parser->bufp, n + 2);
|
|
parser->bufp += n + 1;
|
|
|
|
if ((val = g_hash_table_lookup(parser->symbol_table, symbol_name))
|
|
!= NULL) {
|
|
html_append_str(parser, val, -1);
|
|
parser->state = HTML_NORMAL;
|
|
return;
|
|
} else if (symbol_name[1] == '#' && isdigit(symbol_name[2])) {
|
|
gint ch;
|
|
|
|
ch = atoi(symbol_name + 2);
|
|
if ((ch > 0 && ch <= 127) ||
|
|
(ch >= 128 && ch <= 255 &&
|
|
parser->conv->charset == C_ISO_8859_1)) {
|
|
html_append_char(parser, ch);
|
|
parser->state = HTML_NORMAL;
|
|
return;
|
|
}
|
|
}
|
|
|
|
html_append_str(parser, symbol_name, -1);
|
|
}
|
|
|
|
static void html_get_parenthesis(HTMLParser *parser, gchar *buf, gint len)
|
|
{
|
|
gchar *p;
|
|
|
|
buf[0] = '\0';
|
|
g_return_if_fail(*parser->bufp == '<');
|
|
|
|
/* ignore comments */
|
|
if (!strncmp(parser->bufp, "<!--", 4)) {
|
|
parser->bufp += 4;
|
|
while ((p = strstr(parser->bufp, "-->")) == NULL)
|
|
if (html_read_line(parser) == HTML_EOF) return;
|
|
parser->bufp = p + 3;
|
|
return;
|
|
}
|
|
|
|
parser->bufp++;
|
|
while ((p = strchr(parser->bufp, '>')) == NULL)
|
|
if (html_read_line(parser) == HTML_EOF) return;
|
|
|
|
strncpy2(buf, parser->bufp, MIN(p - parser->bufp + 1, len));
|
|
parser->bufp = p + 1;
|
|
}
|
|
|
|
/* these hash functions were taken from gstring.c in glib */
|
|
#if 0
|
|
static gint g_str_case_equal(gconstpointer v, gconstpointer v2)
|
|
{
|
|
return strcasecmp((const gchar *)v, (const gchar *)v2) == 0;
|
|
}
|
|
|
|
static guint g_str_case_hash(gconstpointer key)
|
|
{
|
|
const gchar *p = key;
|
|
guint h = *p;
|
|
|
|
if (h) {
|
|
h = tolower(h);
|
|
for (p += 1; *p != '\0'; p++)
|
|
h = (h << 5) - h + tolower(*p);
|
|
}
|
|
|
|
return h;
|
|
}
|
|
#endif
|