/*
 *  Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU Lesser General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

/* WARNING
 *
 * DO NOT USE THIS CODE OUTSIDE OF CAMEL
 *
 * IT IS SUBJECT TO CHANGE OR MAY VANISH AT ANY TIME
 */

#include <ctype.h>
#include <stdio.h>
#include <string.h>

#include <glib.h>

#include "camel-html-parser.h"

/* if defined, must also compile in dump_tag() below somewhere */
#define d(x)

static void camel_html_parser_class_init (CamelHTMLParserClass *klass);
static void camel_html_parser_init       (CamelObject *o);
static void camel_html_parser_finalize   (CamelObject *o);

static CamelObjectClass *camel_html_parser_parent;

/* Parser definitions, see below object code for details */

typedef struct _CamelHTMLParserPrivate CamelHTMLParserPrivate;

struct _CamelHTMLParserPrivate {
	gchar *inbuf,
		*inptr,
		*inend,
		*start;
	enum _camel_html_parser_t state;
	gchar *charset;
	gint eof;
	GString *tag;
	GString *ent;
	gchar ent_utf8[8];
	gint attr;
	GPtrArray *attrs;
	GPtrArray *values;
	gint quote;
};

static void tokenise_setup(void);
static CamelHTMLParserPrivate *tokenise_init(void);
static void tokenise_free(CamelHTMLParserPrivate *p);
static gint tokenise_step(CamelHTMLParserPrivate *p, gchar **datap, gint *lenp);

/* ********************************************************************** */

CamelType
camel_html_parser_get_type (void)
{
	static CamelType type = CAMEL_INVALID_TYPE;

	if (type == CAMEL_INVALID_TYPE) {
		type = camel_type_register (camel_object_get_type (), "CamelHTMLParser",
					    sizeof (CamelHTMLParser),
					    sizeof (CamelHTMLParserClass),
					    (CamelObjectClassInitFunc) camel_html_parser_class_init,
					    NULL,
					    (CamelObjectInitFunc) camel_html_parser_init,
					    (CamelObjectFinalizeFunc) camel_html_parser_finalize);
	}

	return type;
}

static void
camel_html_parser_finalize(CamelObject *o)
{
	CamelHTMLParser *f = (CamelHTMLParser *)o;

	tokenise_free(f->priv);
}

static void
camel_html_parser_init       (CamelObject *o)
{
	CamelHTMLParser *f = (CamelHTMLParser *)o;

	f->priv = tokenise_init();
}

static void
camel_html_parser_class_init (CamelHTMLParserClass *klass)
{
	camel_html_parser_parent = CAMEL_OBJECT_CLASS (camel_type_get_global_classfuncs (camel_object_get_type ()));

	tokenise_setup();
}

/**
 * camel_html_parser_new:
 *
 * Create a new CamelHTMLParser object.
 *
 * Return value: A new CamelHTMLParser widget.
 **/
CamelHTMLParser *
camel_html_parser_new (void)
{
	CamelHTMLParser *new = CAMEL_HTML_PARSER ( camel_object_new (camel_html_parser_get_type ()));
	return new;
}

void camel_html_parser_set_data(CamelHTMLParser *hp, const gchar *start, gint len, gint last)
{
	CamelHTMLParserPrivate *p = hp->priv;

	p->inptr = p->inbuf = (gchar *)start;
	p->inend = (gchar *)start+len;
	p->eof = last;
}

camel_html_parser_t camel_html_parser_step(CamelHTMLParser *hp, const gchar **datap, gint *lenp)
{
	return tokenise_step(hp->priv, (gchar **)datap, lenp);
}

const gchar *camel_html_parser_left(CamelHTMLParser *hp, gint *lenp)
{
	CamelHTMLParserPrivate *p = hp->priv;

	if (lenp)
		*lenp = p->inend - p->inptr;

	return p->inptr;
}

const gchar *camel_html_parser_tag(CamelHTMLParser *hp)
{
	return hp->priv->tag->str;
}

const gchar *camel_html_parser_attr(CamelHTMLParser *hp, const gchar *name)
{
	gint i;
	CamelHTMLParserPrivate *p = hp->priv;

	for (i=0;i<p->attrs->len;i++) {
		if (!g_ascii_strcasecmp(((GString *)p->attrs->pdata[i])->str, name)) {
			return ((GString *)p->values->pdata[i])->str;
		}
	}

	return NULL;
}

const GPtrArray *camel_html_parser_attr_list(CamelHTMLParser *hp, const GPtrArray **values)
{
	if (values)
		*values = hp->priv->values;

	return hp->priv->attrs;
}

/* this map taken out of libxml */
static struct {
	guint val;
	const gchar *name;
} entity_map[] = {
/*
 * the 4 absolute ones,
 */
	{ 34,	"quot",	/* quotation mark = APL quote, U+0022 ISOnum */ },
	{ 38,	"amp",	/* ampersand, U+0026 ISOnum */ },
	{ 60,	"lt",	/* less-than sign, U+003C ISOnum */ },
	{ 62,	"gt",	/* greater-than sign, U+003E ISOnum */ },

/*
 * A bunch still in the 128-255 range
 * Replacing them depend really on the charset used.
 */
	{ 39,	"apos",	/* single quote */ },
	{ 160,	"nbsp",	/* no-break space = non-breaking space, U+00A0 ISOnum */ },
	{ 161,	"iexcl",/* inverted exclamation mark, U+00A1 ISOnum */ },
	{ 162,	"cent",	/* cent sign, U+00A2 ISOnum */ },
	{ 163,	"pound",/* pound sign, U+00A3 ISOnum */ },
	{ 164,	"curren",/* currency sign, U+00A4 ISOnum */ },
	{ 165,	"yen",	/* yen sign = yuan sign, U+00A5 ISOnum */ },
	{ 166,	"brvbar",/* broken bar = broken vertical bar, U+00A6 ISOnum */ },
	{ 167,	"sect",	/* section sign, U+00A7 ISOnum */ },
	{ 168,	"uml",	/* diaeresis = spacing diaeresis, U+00A8 ISOdia */ },
	{ 169,	"copy",	/* copyright sign, U+00A9 ISOnum */ },
	{ 170,	"ordf",	/* feminine ordinal indicator, U+00AA ISOnum */ },
	{ 171,	"laquo",/* left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum */ },
	{ 172,	"not",	/* not sign, U+00AC ISOnum */ },
	{ 173,	"shy",	/* soft hyphen = discretionary hyphen, U+00AD ISOnum */ },
	{ 174,	"reg",	/* registered sign = registered trade mark sign, U+00AE ISOnum */ },
	{ 175,	"macr",	/* macron = spacing macron = overline = APL overbar, U+00AF ISOdia */ },
	{ 176,	"deg",	/* degree sign, U+00B0 ISOnum */ },
	{ 177,	"plusmn",/* plus-minus sign = plus-or-minus sign, U+00B1 ISOnum */ },
	{ 178,	"sup2",	/* superscript two = superscript digit two = squared, U+00B2 ISOnum */ },
	{ 179,	"sup3",	/* superscript three = superscript digit three = cubed, U+00B3 ISOnum */ },
	{ 180,	"acute",/* acute accent = spacing acute, U+00B4 ISOdia */ },
	{ 181,	"micro",/* micro sign, U+00B5 ISOnum */ },
	{ 182,	"para",	/* pilcrow sign = paragraph sign, U+00B6 ISOnum */ },
	{ 183,	"middot",/* middle dot = Georgian comma Greek middle dot, U+00B7 ISOnum */ },
	{ 184,	"cedil",/* cedilla = spacing cedilla, U+00B8 ISOdia */ },
	{ 185,	"sup1",	/* superscript one = superscript digit one, U+00B9 ISOnum */ },
	{ 186,	"ordm",	/* masculine ordinal indicator, U+00BA ISOnum */ },
	{ 187,	"raquo",/* right-pointing double angle quotation mark right pointing guillemet, U+00BB ISOnum */ },
	{ 188,	"frac14",/* vulgar fraction one quarter = fraction one quarter, U+00BC ISOnum */ },
	{ 189,	"frac12",/* vulgar fraction one half = fraction one half, U+00BD ISOnum */ },
	{ 190,	"frac34",/* vulgar fraction three quarters = fraction three quarters, U+00BE ISOnum */ },
	{ 191,	"iquest",/* inverted question mark = turned question mark, U+00BF ISOnum */ },
	{ 192,	"Agrave",/* latin capital letter A with grave = latin capital letter A grave, U+00C0 ISOlat1 */ },
	{ 193,	"Aacute",/* latin capital letter A with acute, U+00C1 ISOlat1 */ },
	{ 194,	"Acirc",/* latin capital letter A with circumflex, U+00C2 ISOlat1 */ },
	{ 195,	"Atilde",/* latin capital letter A with tilde, U+00C3 ISOlat1 */ },
	{ 196,	"Auml",	/* latin capital letter A with diaeresis, U+00C4 ISOlat1 */ },
	{ 197,	"Aring",/* latin capital letter A with ring above = latin capital letter A ring, U+00C5 ISOlat1 */ },
	{ 198,	"AElig",/* latin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1 */ },
	{ 199,	"Ccedil",/* latin capital letter C with cedilla, U+00C7 ISOlat1 */ },
	{ 200,	"Egrave",/* latin capital letter E with grave, U+00C8 ISOlat1 */ },
	{ 201,	"Eacute",/* latin capital letter E with acute, U+00C9 ISOlat1 */ },
	{ 202,	"Ecirc",/* latin capital letter E with circumflex, U+00CA ISOlat1 */ },
	{ 203,	"Euml",	/* latin capital letter E with diaeresis, U+00CB ISOlat1 */ },
	{ 204,	"Igrave",/* latin capital letter I with grave, U+00CC ISOlat1 */ },
	{ 205,	"Iacute",/* latin capital letter I with acute, U+00CD ISOlat1 */ },
	{ 206,	"Icirc",/* latin capital letter I with circumflex, U+00CE ISOlat1 */ },
	{ 207,	"Iuml",	/* latin capital letter I with diaeresis, U+00CF ISOlat1 */ },
	{ 208,	"ETH",	/* latin capital letter ETH, U+00D0 ISOlat1 */ },
	{ 209,	"Ntilde",/* latin capital letter N with tilde, U+00D1 ISOlat1 */ },
	{ 210,	"Ograve",/* latin capital letter O with grave, U+00D2 ISOlat1 */ },
	{ 211,	"Oacute",/* latin capital letter O with acute, U+00D3 ISOlat1 */ },
	{ 212,	"Ocirc",/* latin capital letter O with circumflex, U+00D4 ISOlat1 */ },
	{ 213,	"Otilde",/* latin capital letter O with tilde, U+00D5 ISOlat1 */ },
	{ 214,	"Ouml",	/* latin capital letter O with diaeresis, U+00D6 ISOlat1 */ },
	{ 215,	"times",/* multiplication sign, U+00D7 ISOnum */ },
	{ 216,	"Oslash",/* latin capital letter O with stroke latin capital letter O slash, U+00D8 ISOlat1 */ },
	{ 217,	"Ugrave",/* latin capital letter U with grave, U+00D9 ISOlat1 */ },
	{ 218,	"Uacute",/* latin capital letter U with acute, U+00DA ISOlat1 */ },
	{ 219,	"Ucirc",/* latin capital letter U with circumflex, U+00DB ISOlat1 */ },
	{ 220,	"Uuml",	/* latin capital letter U with diaeresis, U+00DC ISOlat1 */ },
	{ 221,	"Yacute",/* latin capital letter Y with acute, U+00DD ISOlat1 */ },
	{ 222,	"THORN",/* latin capital letter THORN, U+00DE ISOlat1 */ },
	{ 223,	"szlig",/* latin small letter sharp s = ess-zed, U+00DF ISOlat1 */ },
	{ 224,	"agrave",/* latin small letter a with grave = latin small letter a grave, U+00E0 ISOlat1 */ },
	{ 225,	"aacute",/* latin small letter a with acute, U+00E1 ISOlat1 */ },
	{ 226,	"acirc",/* latin small letter a with circumflex, U+00E2 ISOlat1 */ },
	{ 227,	"atilde",/* latin small letter a with tilde, U+00E3 ISOlat1 */ },
	{ 228,	"auml",	/* latin small letter a with diaeresis, U+00E4 ISOlat1 */ },
	{ 229,	"aring",/* latin small letter a with ring above = latin small letter a ring, U+00E5 ISOlat1 */ },
	{ 230,	"aelig",/* latin small letter ae = latin small ligature ae, U+00E6 ISOlat1 */ },
	{ 231,	"ccedil",/* latin small letter c with cedilla, U+00E7 ISOlat1 */ },
	{ 232,	"egrave",/* latin small letter e with grave, U+00E8 ISOlat1 */ },
	{ 233,	"eacute",/* latin small letter e with acute, U+00E9 ISOlat1 */ },
	{ 234,	"ecirc",/* latin small letter e with circumflex, U+00EA ISOlat1 */ },
	{ 235,	"euml",	/* latin small letter e with diaeresis, U+00EB ISOlat1 */ },
	{ 236,	"igrave",/* latin small letter i with grave, U+00EC ISOlat1 */ },
	{ 237,	"iacute",/* latin small letter i with acute, U+00ED ISOlat1 */ },
	{ 238,	"icirc",/* latin small letter i with circumflex, U+00EE ISOlat1 */ },
	{ 239,	"iuml",	/* latin small letter i with diaeresis, U+00EF ISOlat1 */ },
	{ 240,	"eth",	/* latin small letter eth, U+00F0 ISOlat1 */ },
	{ 241,	"ntilde",/* latin small letter n with tilde, U+00F1 ISOlat1 */ },
	{ 242,	"ograve",/* latin small letter o with grave, U+00F2 ISOlat1 */ },
	{ 243,	"oacute",/* latin small letter o with acute, U+00F3 ISOlat1 */ },
	{ 244,	"ocirc",/* latin small letter o with circumflex, U+00F4 ISOlat1 */ },
	{ 245,	"otilde",/* latin small letter o with tilde, U+00F5 ISOlat1 */ },
	{ 246,	"ouml",	/* latin small letter o with diaeresis, U+00F6 ISOlat1 */ },
	{ 247,	"divide",/* division sign, U+00F7 ISOnum */ },
	{ 248,	"oslash",/* latin small letter o with stroke, = latin small letter o slash, U+00F8 ISOlat1 */ },
	{ 249,	"ugrave",/* latin small letter u with grave, U+00F9 ISOlat1 */ },
	{ 250,	"uacute",/* latin small letter u with acute, U+00FA ISOlat1 */ },
	{ 251,	"ucirc",/* latin small letter u with circumflex, U+00FB ISOlat1 */ },
	{ 252,	"uuml",	/* latin small letter u with diaeresis, U+00FC ISOlat1 */ },
	{ 253,	"yacute",/* latin small letter y with acute, U+00FD ISOlat1 */ },
	{ 254,	"thorn",/* latin small letter thorn with, U+00FE ISOlat1 */ },
	{ 255,	"yuml",	/* latin small letter y with diaeresis, U+00FF ISOlat1 */ },

/*
 * Anything below should really be kept as entities references
 */
	{ 402,	"fnof",	/* latin small f with hook = function = florin, U+0192 ISOtech */ },

	{ 913,	"Alpha",/* greek capital letter alpha, U+0391 */ },
	{ 914,	"Beta",	/* greek capital letter beta, U+0392 */ },
	{ 915,	"Gamma",/* greek capital letter gamma, U+0393 ISOgrk3 */ },
	{ 916,	"Delta",/* greek capital letter delta, U+0394 ISOgrk3 */ },
	{ 917,	"Epsilon",/* greek capital letter epsilon, U+0395 */ },
	{ 918,	"Zeta",	/* greek capital letter zeta, U+0396 */ },
	{ 919,	"Eta",	/* greek capital letter eta, U+0397 */ },
	{ 920,	"Theta",/* greek capital letter theta, U+0398 ISOgrk3 */ },
	{ 921,	"Iota",	/* greek capital letter iota, U+0399 */ },
	{ 922,	"Kappa",/* greek capital letter kappa, U+039A */ },
	{ 923,	"Lambda"/* greek capital letter lambda, U+039B ISOgrk3 */ },
	{ 924,	"Mu",	/* greek capital letter mu, U+039C */ },
	{ 925,	"Nu",	/* greek capital letter nu, U+039D */ },
	{ 926,	"Xi",	/* greek capital letter xi, U+039E ISOgrk3 */ },
	{ 927,	"Omicron",/* greek capital letter omicron, U+039F */ },
	{ 928,	"Pi",	/* greek capital letter pi, U+03A0 ISOgrk3 */ },
	{ 929,	"Rho",	/* greek capital letter rho, U+03A1 */ },
	{ 931,	"Sigma",/* greek capital letter sigma, U+03A3 ISOgrk3 */ },
	{ 932,	"Tau",	/* greek capital letter tau, U+03A4 */ },
	{ 933,	"Upsilon",/* greek capital letter upsilon, U+03A5 ISOgrk3 */ },
	{ 934,	"Phi",	/* greek capital letter phi, U+03A6 ISOgrk3 */ },
	{ 935,	"Chi",	/* greek capital letter chi, U+03A7 */ },
	{ 936,	"Psi",	/* greek capital letter psi, U+03A8 ISOgrk3 */ },
	{ 937,	"Omega",/* greek capital letter omega, U+03A9 ISOgrk3 */ },

	{ 945,	"alpha",/* greek small letter alpha, U+03B1 ISOgrk3 */ },
	{ 946,	"beta",	/* greek small letter beta, U+03B2 ISOgrk3 */ },
	{ 947,	"gamma",/* greek small letter gamma, U+03B3 ISOgrk3 */ },
	{ 948,	"delta",/* greek small letter delta, U+03B4 ISOgrk3 */ },
	{ 949,	"epsilon",/* greek small letter epsilon, U+03B5 ISOgrk3 */ },
	{ 950,	"zeta",	/* greek small letter zeta, U+03B6 ISOgrk3 */ },
	{ 951,	"eta",	/* greek small letter eta, U+03B7 ISOgrk3 */ },
	{ 952,	"theta",/* greek small letter theta, U+03B8 ISOgrk3 */ },
	{ 953,	"iota",	/* greek small letter iota, U+03B9 ISOgrk3 */ },
	{ 954,	"kappa",/* greek small letter kappa, U+03BA ISOgrk3 */ },
	{ 955,	"lambda",/* greek small letter lambda, U+03BB ISOgrk3 */ },
	{ 956,	"mu",	/* greek small letter mu, U+03BC ISOgrk3 */ },
	{ 957,	"nu",	/* greek small letter nu, U+03BD ISOgrk3 */ },
	{ 958,	"xi",	/* greek small letter xi, U+03BE ISOgrk3 */ },
	{ 959,	"omicron",/* greek small letter omicron, U+03BF NEW */ },
	{ 960,	"pi",	/* greek small letter pi, U+03C0 ISOgrk3 */ },
	{ 961,	"rho",	/* greek small letter rho, U+03C1 ISOgrk3 */ },
	{ 962,	"sigmaf",/* greek small letter final sigma, U+03C2 ISOgrk3 */ },
	{ 963,	"sigma",/* greek small letter sigma, U+03C3 ISOgrk3 */ },
	{ 964,	"tau",	/* greek small letter tau, U+03C4 ISOgrk3 */ },
	{ 965,	"upsilon",/* greek small letter upsilon, U+03C5 ISOgrk3 */ },
	{ 966,	"phi",	/* greek small letter phi, U+03C6 ISOgrk3 */ },
	{ 967,	"chi",	/* greek small letter chi, U+03C7 ISOgrk3 */ },
	{ 968,	"psi",	/* greek small letter psi, U+03C8 ISOgrk3 */ },
	{ 969,	"omega",/* greek small letter omega, U+03C9 ISOgrk3 */ },
	{ 977,	"thetasym",/* greek small letter theta symbol, U+03D1 NEW */ },
	{ 978,	"upsih",/* greek upsilon with hook symbol, U+03D2 NEW */ },
	{ 982,	"piv",	/* greek pi symbol, U+03D6 ISOgrk3 */ },

	{ 8226,	"bull",	/* bullet = black small circle, U+2022 ISOpub */ },
	{ 8230,	"hellip",/* horizontal ellipsis = three dot leader, U+2026 ISOpub */ },
	{ 8242,	"prime",/* prime = minutes = feet, U+2032 ISOtech */ },
	{ 8243,	"Prime",/* double prime = seconds = inches, U+2033 ISOtech */ },
	{ 8254,	"oline",/* overline = spacing overscore, U+203E NEW */ },
	{ 8260,	"frasl",/* fraction slash, U+2044 NEW */ },

	{ 8472,	"weierp",/* script capital P = power set = Weierstrass p, U+2118 ISOamso */ },
	{ 8465,	"image",/* blackletter capital I = imaginary part, U+2111 ISOamso */ },
	{ 8476,	"real",	/* blackletter capital R = real part symbol, U+211C ISOamso */ },
	{ 8482,	"trade",/* trade mark sign, U+2122 ISOnum */ },
	{ 8501,	"alefsym",/* alef symbol = first transfinite cardinal, U+2135 NEW */ },
	{ 8592,	"larr",	/* leftwards arrow, U+2190 ISOnum */ },
	{ 8593,	"uarr",	/* upwards arrow, U+2191 ISOnum */ },
	{ 8594,	"rarr",	/* rightwards arrow, U+2192 ISOnum */ },
	{ 8595,	"darr",	/* downwards arrow, U+2193 ISOnum */ },
	{ 8596,	"harr",	/* left right arrow, U+2194 ISOamsa */ },
	{ 8629,	"crarr",/* downwards arrow with corner leftwards = carriage return, U+21B5 NEW */ },
	{ 8656,	"lArr",	/* leftwards double arrow, U+21D0 ISOtech */ },
	{ 8657,	"uArr",	/* upwards double arrow, U+21D1 ISOamsa */ },
	{ 8658,	"rArr",	/* rightwards double arrow, U+21D2 ISOtech */ },
	{ 8659,	"dArr",	/* downwards double arrow, U+21D3 ISOamsa */ },
	{ 8660,	"hArr",	/* left right double arrow, U+21D4 ISOamsa */ },

	{ 8704,	"forall",/* for all, U+2200 ISOtech */ },
	{ 8706,	"part",	/* partial differential, U+2202 ISOtech */ },
	{ 8707,	"exist",/* there exists, U+2203 ISOtech */ },
	{ 8709,	"empty",/* empty set = null set = diameter, U+2205 ISOamso */ },
	{ 8711,	"nabla",/* nabla = backward difference, U+2207 ISOtech */ },
	{ 8712,	"isin",	/* element of, U+2208 ISOtech */ },
	{ 8713,	"notin",/* not an element of, U+2209 ISOtech */ },
	{ 8715,	"ni",	/* contains as member, U+220B ISOtech */ },
	{ 8719,	"prod",	/* n-ary product = product sign, U+220F ISOamsb */ },
	{ 8721,	"sum",	/* n-ary sumation, U+2211 ISOamsb */ },
	{ 8722,	"minus",/* minus sign, U+2212 ISOtech */ },
	{ 8727,	"lowast",/* asterisk operator, U+2217 ISOtech */ },
	{ 8730,	"radic",/* square root = radical sign, U+221A ISOtech */ },
	{ 8733,	"prop",	/* proportional to, U+221D ISOtech */ },
	{ 8734,	"infin",/* infinity, U+221E ISOtech */ },
	{ 8736,	"ang",	/* angle, U+2220 ISOamso */ },
	{ 8743,	"and",	/* logical and = wedge, U+2227 ISOtech */ },
	{ 8744,	"or",	/* logical or = vee, U+2228 ISOtech */ },
	{ 8745,	"cap",	/* intersection = cap, U+2229 ISOtech */ },
	{ 8746,	"cup",	/* union = cup, U+222A ISOtech */ },
	{ 8747,	"int",	/* integral, U+222B ISOtech */ },
	{ 8756,	"there4",/* therefore, U+2234 ISOtech */ },
	{ 8764,	"sim",	/* tilde operator = varies with = similar to, U+223C ISOtech */ },
	{ 8773,	"cong",	/* approximately equal to, U+2245 ISOtech */ },
	{ 8776,	"asymp",/* almost equal to = asymptotic to, U+2248 ISOamsr */ },
	{ 8800,	"ne",	/* not equal to, U+2260 ISOtech */ },
	{ 8801,	"equiv",/* identical to, U+2261 ISOtech */ },
	{ 8804,	"le",	/* less-than or equal to, U+2264 ISOtech */ },
	{ 8805,	"ge",	/* greater-than or equal to, U+2265 ISOtech */ },
	{ 8834,	"sub",	/* subset of, U+2282 ISOtech */ },
	{ 8835,	"sup",	/* superset of, U+2283 ISOtech */ },
	{ 8836,	"nsub",	/* not a subset of, U+2284 ISOamsn */ },
	{ 8838,	"sube",	/* subset of or equal to, U+2286 ISOtech */ },
	{ 8839,	"supe",	/* superset of or equal to, U+2287 ISOtech */ },
	{ 8853,	"oplus",/* circled plus = direct sum, U+2295 ISOamsb */ },
	{ 8855,	"otimes",/* circled times = vector product, U+2297 ISOamsb */ },
	{ 8869,	"perp",	/* up tack = orthogonal to = perpendicular, U+22A5 ISOtech */ },
	{ 8901,	"sdot",	/* dot operator, U+22C5 ISOamsb */ },
	{ 8968,	"lceil",/* left ceiling = apl upstile, U+2308 ISOamsc */ },
	{ 8969,	"rceil",/* right ceiling, U+2309 ISOamsc */ },
	{ 8970,	"lfloor",/* left floor = apl downstile, U+230A ISOamsc */ },
	{ 8971,	"rfloor",/* right floor, U+230B ISOamsc */ },
	{ 9001,	"lang",	/* left-pointing angle bracket = bra, U+2329 ISOtech */ },
	{ 9002,	"rang",	/* right-pointing angle bracket = ket, U+232A ISOtech */ },
	{ 9674,	"loz",	/* lozenge, U+25CA ISOpub */ },

	{ 9824,	"spades",/* black spade suit, U+2660 ISOpub */ },
	{ 9827,	"clubs",/* black club suit = shamrock, U+2663 ISOpub */ },
	{ 9829,	"hearts",/* black heart suit = valentine, U+2665 ISOpub */ },
	{ 9830,	"diams",/* black diamond suit, U+2666 ISOpub */ },

	{ 338,	"OElig",/* latin capital ligature OE, U+0152 ISOlat2 */ },
	{ 339,	"oelig",/* latin small ligature oe, U+0153 ISOlat2 */ },
	{ 352,	"Scaron",/* latin capital letter S with caron, U+0160 ISOlat2 */ },
	{ 353,	"scaron",/* latin small letter s with caron, U+0161 ISOlat2 */ },
	{ 376,	"Yuml",	/* latin capital letter Y with diaeresis, U+0178 ISOlat2 */ },
	{ 710,	"circ",	/* modifier letter circumflex accent, U+02C6 ISOpub */ },
	{ 732,	"tilde",/* small tilde, U+02DC ISOdia */ },

	{ 8194,	"ensp",	/* en space, U+2002 ISOpub */ },
	{ 8195,	"emsp",	/* em space, U+2003 ISOpub */ },
	{ 8201,	"thinsp",/* thin space, U+2009 ISOpub */ },
	{ 8204,	"zwnj",	/* zero width non-joiner, U+200C NEW RFC 2070 */ },
	{ 8205,	"zwj",	/* zero width joiner, U+200D NEW RFC 2070 */ },
	{ 8206,	"lrm",	/* left-to-right mark, U+200E NEW RFC 2070 */ },
	{ 8207,	"rlm",	/* right-to-left mark, U+200F NEW RFC 2070 */ },
	{ 8211,	"ndash",/* en dash, U+2013 ISOpub */ },
	{ 8212,	"mdash",/* em dash, U+2014 ISOpub */ },
	{ 8216,	"lsquo",/* left single quotation mark, U+2018 ISOnum */ },
	{ 8217,	"rsquo",/* right single quotation mark, U+2019 ISOnum */ },
	{ 8218,	"sbquo",/* single low-9 quotation mark, U+201A NEW */ },
	{ 8220,	"ldquo",/* left double quotation mark, U+201C ISOnum */ },
	{ 8221,	"rdquo",/* right double quotation mark, U+201D ISOnum */ },
	{ 8222,	"bdquo",/* double low-9 quotation mark, U+201E NEW */ },
	{ 8224,	"dagger",/* dagger, U+2020 ISOpub */ },
	{ 8225,	"Dagger",/* double dagger, U+2021 ISOpub */ },
	{ 8240,	"permil",/* per mille sign, U+2030 ISOtech */ },
	{ 8249,	"lsaquo",/* single left-pointing angle quotation mark, U+2039 ISO proposed */ },
	{ 8250,	"rsaquo",/* single right-pointing angle quotation mark, U+203A ISO proposed */ },
	{ 8364,	"euro",	/* euro sign, U+20AC NEW */ }
};

static GHashTable *entities;

/* this cannot be called in a thread context */
static void tokenise_setup(void)
{
	gint i;

	if (entities == NULL) {
		entities = g_hash_table_new(g_str_hash, g_str_equal);
		for (i = 0; i < G_N_ELEMENTS (entity_map); i++) {
			g_hash_table_insert(entities, (gchar *)entity_map[i].name, GUINT_TO_POINTER(entity_map[i].val));
		}
	}
}

static CamelHTMLParserPrivate *tokenise_init(void)
{
	CamelHTMLParserPrivate *p;

	p = g_malloc(sizeof(*p));
	p->state = CAMEL_HTML_PARSER_DATA;

	p->attr = 0;
	p->attrs = g_ptr_array_new();
	p->values = g_ptr_array_new();
	p->tag = g_string_new("");
	p->ent = g_string_new("");
	p->charset = NULL;

	if (entities == NULL)
		tokenise_setup();

	return p;
}

static void tokenise_free(CamelHTMLParserPrivate *p)
{
	gint i;

	g_string_free(p->tag, TRUE);
	g_string_free(p->ent, TRUE);
	g_free(p->charset);

	for (i=0;i<p->attrs->len;i++)
		g_string_free(p->attrs->pdata[i], TRUE);

	for (i=0;i<p->values->len;i++)
		g_string_free(p->values->pdata[i], TRUE);

	g_free(p);
}

static gint convert_entity(const gchar *e, gchar *ent)
{
	guint val;

	if (e[0] == '#')
		return g_unichar_to_utf8(atoi(e+1), ent);

	val = GPOINTER_TO_UINT(g_hash_table_lookup(entities, e));
	if (ent)
		return g_unichar_to_utf8(val, ent);
	else
		return 0;
}

#if 0
static void dump_tag(CamelHTMLParserPrivate *p)
{
	gint i;

	printf("got tag: %s\n", p->tag->str);
	printf("%d attributes:\n", p->attr);
	for (i=0;i<p->attr;i++) {
		printf(" %s = '%s'\n", ((GString *)p->attrs->pdata[i])->str, ((GString *)p->values->pdata[i])->str);
	}
}
#endif

static gint tokenise_step(CamelHTMLParserPrivate *p, gchar **datap, gint *lenp)
{
	gchar *in = p->inptr;
	gchar *inend = p->inend;
	gchar c;
	gint state = p->state, ret, len;
	gchar *start = p->inptr;

	d(printf("Tokenise step\n"));

	while (in < inend) {
		c = *in++;
		switch (state) {
		case CAMEL_HTML_PARSER_DATA:
			if (c == '<') {
				ret = state;
				state = CAMEL_HTML_PARSER_TAG;
				p->attr = 0;
				g_string_truncate(p->tag, 0);
				d(printf("got data '%.*s'\n", in-start-1, start));
				*datap = start;
				*lenp = in-start-1;
				goto done;
			} else if (c=='&') {
				ret = state;
				state = CAMEL_HTML_PARSER_ENT;
				g_string_truncate(p->ent, 0);
				g_string_append_c(p->ent, c);
				d(printf("got data '%.*s'\n", in-start-1, start));
				*datap = start;
				*lenp = in-start-1;
				goto done;
			}
			break;
		case CAMEL_HTML_PARSER_ENT:
			if (c==';') {
				len = convert_entity(p->ent->str+1, p->ent_utf8);
				if (len == 0) {
					/* handle broken entity */
					g_string_append_c(p->ent, c);
					ret = state = CAMEL_HTML_PARSER_DATA;
					*datap = p->ent->str;
					*lenp = p->ent->len;
					goto done;
				} else {
					d(printf("got entity: %s = %s\n", p->ent->str, p->ent_utf8));
					ret = state;
					state = CAMEL_HTML_PARSER_DATA;
					*datap = p->ent_utf8;
					*lenp = len;
					goto done;
				}
			} else if (isalnum(c) || c=='#') { /* FIXME: right type */
				g_string_append_c(p->ent, c);
			} else {
				/* handle broken entity */
				g_string_append_c(p->ent, c);
				ret = state = CAMEL_HTML_PARSER_DATA;
				*datap = p->ent->str;
				*lenp = p->ent->len;
				goto done;
			}
			break;
		case CAMEL_HTML_PARSER_TAG:
			if (c == '!') {
				state = CAMEL_HTML_PARSER_COMMENT0;
				g_string_append_c(p->tag, c);
			} else if (c == '>') {
				d(dump_tag(p));
				ret = CAMEL_HTML_PARSER_ELEMENT;
				state = CAMEL_HTML_PARSER_DATA;
				goto done;
			} else if (c == ' ' || c=='\n' || c=='\t') {
				state = CAMEL_HTML_PARSER_ATTR0;
			} else {
				g_string_append_c(p->tag, c);
			}
			break;
			/* check for <!-- */
		case CAMEL_HTML_PARSER_COMMENT0:
			if (c == '-') {
				g_string_append_c(p->tag, c);
				if (p->tag->len == 3) {
					g_string_truncate(p->tag, 0);
					state = CAMEL_HTML_PARSER_COMMENT;
				}
			} else {
				/* got something else, probbly dtd entity */
				state = CAMEL_HTML_PARSER_DTDENT;
			}
			break;
		case CAMEL_HTML_PARSER_DTDENT:
			if (c == '>') {
				ret = CAMEL_HTML_PARSER_DTDENT;
				state = CAMEL_HTML_PARSER_DATA;
				*datap = start;
				*lenp = in-start-1;
				goto done;
			}
			break;
		case CAMEL_HTML_PARSER_COMMENT:
			if (c == '>' && p->tag->len == 2) {
				ret = CAMEL_HTML_PARSER_COMMENT;
				state = CAMEL_HTML_PARSER_DATA;
				*datap = start;
				*lenp = in-start-1;
				goto done;
			} else if (c=='-') {
				/* we dont care if we get 'n' --'s before the > */
				if (p->tag->len < 2)
					g_string_append_c(p->tag, c);
			} else {
				g_string_truncate(p->tag, 0);
			}
			break;
		case CAMEL_HTML_PARSER_ATTR0:	/* pre-attribute whitespace */
			if (c == '>') {
				d(dump_tag(p));
				ret = CAMEL_HTML_PARSER_ELEMENT;
				state = CAMEL_HTML_PARSER_DATA;
				goto done;
			} else if (c == ' ' || c=='\n' || c=='\t') {
			} else {
				if (p->attrs->len <= p->attr) {
					g_ptr_array_add(p->attrs, g_string_new(""));
					g_ptr_array_add(p->values, g_string_new(""));
				} else {
					g_string_truncate(p->attrs->pdata[p->attr], 0);
					g_string_truncate(p->values->pdata[p->attr], 0);
				}
				g_string_append_c(p->attrs->pdata[p->attr], c);
				state = CAMEL_HTML_PARSER_ATTR;
			}
			break;
		case CAMEL_HTML_PARSER_ATTR:
			if (c == '>') {
				d(dump_tag(p));
				ret = CAMEL_HTML_PARSER_ELEMENT;
				state = CAMEL_HTML_PARSER_DATA;
				goto done;
			} else if (c == '=') {
				state = CAMEL_HTML_PARSER_VAL0;
			} else if (c == ' ' || c=='\n' || c=='\t') {
				state = CAMEL_HTML_PARSER_ATTR0;
				p->attr++;
			} else {
				g_string_append_c(p->attrs->pdata[p->attr], c);
			}
			break;
		case CAMEL_HTML_PARSER_VAL0:
			if (c == '>') {
				d(printf("value truncated\n"));
				d(dump_tag(p));
				ret = CAMEL_HTML_PARSER_ELEMENT;
				state = CAMEL_HTML_PARSER_DATA;
				goto done;
			} else if (c == '\'' || c == '\"') {
				p->quote = c;
				state = CAMEL_HTML_PARSER_VAL;
			} else if (c == ' ' || c=='\n' || c=='\t') {
			} else {
				g_string_append_c(p->values->pdata[p->attr], c);
				p->quote = 0;
				state = CAMEL_HTML_PARSER_VAL;
			}
			break;
		case CAMEL_HTML_PARSER_VAL:
		do_val:
			if (p->quote) {
				if (c == '>') {
					d(printf("value truncated\n"));
					d(dump_tag(p));
					ret = CAMEL_HTML_PARSER_ELEMENT;
					state = CAMEL_HTML_PARSER_DATA;
					p->attr++;
					goto done;
				} else if (c == p->quote) {
					state = CAMEL_HTML_PARSER_ATTR0;
					p->attr++;
				} else if (c=='&') {
					state = CAMEL_HTML_PARSER_VAL_ENT;
					g_string_truncate(p->ent, 0);
				} else {
					g_string_append_c(p->values->pdata[p->attr], c);
				}
			} else if (c == '>') {
				d(dump_tag(p));
				ret = CAMEL_HTML_PARSER_ELEMENT;
				state = CAMEL_HTML_PARSER_DATA;
				p->attr++;
				goto done;
			} else if (c == ' ' || c=='\n' || c=='\t') {
				state = CAMEL_HTML_PARSER_ATTR0;
				p->attr++;
			} else if (c=='&') {
				state = CAMEL_HTML_PARSER_VAL_ENT;
				g_string_truncate(p->ent, 0);
			} else {
				g_string_append_c(p->values->pdata[p->attr], c);
			}
			break;
		case CAMEL_HTML_PARSER_VAL_ENT:
			if (c==';') {
				state = CAMEL_HTML_PARSER_VAL;
				len = convert_entity(p->ent->str+1, p->ent_utf8);
				if (len == 0) {
					/* fallback; broken entity, just output it and see why we ended */
					g_string_append(p->values->pdata[p->attr], p->ent->str);
					g_string_append_c(p->values->pdata[p->attr], ';');
				} else {
					d(printf("got entity: %s = %s\n", p->ent->str, p->ent_utf8));
					g_string_append_len(p->values->pdata[p->attr], p->ent_utf8, len);
				}
			} else if (isalnum(c) || c=='#') { /* FIXME: right type */
				g_string_append_c(p->ent, c);
			} else {
				/* fallback; broken entity, just output it and see why we ended */
				g_string_append(p->values->pdata[p->attr], p->ent->str);
				goto do_val;
			}
			break;
		}
	}

	if (p->eof) {
		/* FIXME: what about other truncated states? */
		switch (state) {
		case CAMEL_HTML_PARSER_DATA:
		case CAMEL_HTML_PARSER_COMMENT:
			if (in > start) {
				ret = state;
				*datap = start;
				*lenp = in-start-1;
			} else {
				ret = CAMEL_HTML_PARSER_EOF;
				state = CAMEL_HTML_PARSER_EOF;
			}
			break;
		default:
			ret = CAMEL_HTML_PARSER_EOF;
			state = CAMEL_HTML_PARSER_EOF;
		}
	} else {
		/* we only care about remaining data for this buffer, everything else has its own copy */
		switch (state) {
		case CAMEL_HTML_PARSER_DATA:
		case CAMEL_HTML_PARSER_COMMENT:
			if (in > start) {
				ret = state;
				*datap = start;
				*lenp = in-start-1;
			} else {
				ret = CAMEL_HTML_PARSER_EOD;
			}
			break;
		default:
			ret = CAMEL_HTML_PARSER_EOD;
		}
	}

done:
	p->start = start;
	p->state = state;
	p->inptr = in;

	return ret;
}
