contra/source/html_special.hpp

#ifndef HTML_SPECIAL_HPP

#include <codecvt>
#include <locale>

const char * html_special_table[][2] = 
{
	{"&Aacute;",	"&#193;"},
	{"&aacute;",	"&#225;"},
	{"&Acirc;",		"&#194;"},
	{"&acirc;",		"&#226;"},
	{"&acute;",		"&#180;"},
	{"&AElig;",		"&#198;"},
	{"&aelig;",		"&#230;"},
	{"&Agrave;",	"&#192;"},
	{"&agrave;",	"&#224;"},
	{"&Alpha;",		"&#913;"},
	{"&alpha;",		"&#945;"},
	{"&amp;",		"&#38;"},
	{"&and;",		"&#8743;"},
	{"&ang;",		"&#8736;"},
	{"&apos;",		"&#39;"},
	{"&Aring;",		"&#197;"},
	{"&aring;",		"&#229;"},
	{"&asymp;",		"&#8776;"},
	{"&Atilde;",	"&#195;"},
	{"&atilde;",	"&#227;"},
	{"&Auml;",		"&#196;"},
	{"&auml;",		"&#228;"},
	{"&bdquo;",		"&#8222;"},
	{"&Beta;",		"&#914;"},
	{"&beta;",		"&#946;"},
	{"&brvbar;",	"&#166;"},
	{"&bull;",		"&#8226;"},
	{"&cap;",		"&#8745;"},
	{"&Ccedil;",	"&#199;"},
	{"&ccedil;",	"&#231;"},
	{"&cedil;",		"&#184;"},
	{"&cent;",		"&#162;"},
	{"&Chi;",		"&#935;"},
	{"&chi;",		"&#967;"},
	{"&circ;",		"&#710;"},
	{"&clubs;",		"&#9827;"},
	{"&cong;",		"&#8773;"},
	{"&copy;",		"&#169;"},
	{"&crarr;",		"&#8629;"},
	{"&cup;",		"&#8746;"},
	{"&curren;",	"&#164;"},
	{"&dagger;",	"&#8224;"},
	{"&Dagger;",	"&#8225;"},
	{"&darr;",		"&#8595;"},
	{"&deg;",		"&#176;"},
	{"&Delta;",		"&#916;"},
	{"&delta;",		"&#948;"},
	{"&diams;",		"&#9830;"},
	{"&divide;",	"&#247;"},
	{"&Eacute;",	"&#201;"},
	{"&eacute;",	"&#233;"},
	{"&Ecirc;",		"&#202;"},
	{"&ecirc;",		"&#234;"},
	{"&Egrave;",	"&#200;"},
	{"&egrave;",	"&#232;"},
	{"&empty;",		"&#8709;"},
	{"&emsp;",		"&#8195;"},
	{"&ensp;",		"&#8194;"},
	{"&Epsilon;",	"&#917;"},
	{"&epsilon;",	"&#949;"},
	{"&equiv;",		"&#8801;"},
	{"&Eta;",		"&#919;"},
	{"&eta;",		"&#951;"},
	{"&ETH;",		"&#208;"},
	{"&eth;",		"&#240;"},
	{"&Euml;",		"&#203;"},
	{"&euml;",		"&#235;"},
	{"&euro;",		"&#8364;"},
	{"&exist;",		"&#8707;"},
	{"&fnof;",		"&#402;"},
	{"&forall;",	"&#8704;"},
	{"&frac12;",	"&#189;"},
	{"&frac14;",	"&#188;"},
	{"&frac34;",	"&#190;"},
	{"&Gamma;",		"&#915;"},
	{"&gamma;",		"&#947;"},
	{"&ge;",		"&#8805;"},
	{"&gt;",		"&#62;"},
	{"&harr;",		"&#8596;"},
	{"&hearts;",	"&#9829;"},
	{"&hellip;",	"&#8230;"},
	{"&Iacute;",	"&#205;"},
	{"&iacute;",	"&#237;"},
	{"&Icirc;",		"&#206;"},
	{"&icirc;",		"&#238;"},
	{"&iexcl;",		"&#161;"},
	{"&Igrave;",	"&#204;"},
	{"&igrave;",	"&#236;"},
	{"&infin;",		"&#8734;"},
	{"&int;",		"&#8747;"},
	{"&Iota;",		"&#921;"},
	{"&iota;",		"&#953;"},
	{"&iquest;",	"&#191;"},
	{"&isin;",		"&#8712;"},
	{"&Iuml;",		"&#207;"},
	{"&iuml;",		"&#239;"},
	{"&Kappa;",		"&#922;"},
	{"&kappa;",		"&#954;"},
	{"&Lambda;",	"&#923;"},
	{"&lambda;",	"&#955;"},
	{"&laquo;",		"&#171;"},
	{"&larr;",		"&#8592;"},
	{"&lceil;",		"&#8968;"},
	{"&ldquo;",		"&#8220;"},
	{"&le;",		"&#8804;"},
	{"&lfloor;",	"&#8970;"},
	{"&lowast;",	"&#8727;"},
	{"&loz;",		"&#9674;"},
	{"&lrm;",		"&#8206;"},
	{"&lsaquo;",	"&#8249;"},
	{"&lsquo;",		"&#8216;"},
	{"&lt;",		"&#60;"},
	{"&macr;",		"&#175;"},
	{"&mdash;",		"&#8212;"},
	{"&micro;",		"&#181;"},
	{"&middot;",	"&#183;"},
	{"&minus;",		"&#8722;"},
	{"&Mu;",		"&#924;"},
	{"&mu;",		"&#956;"},
	{"&nabla;",		"&#8711;"},
	{"&nbsp;",		"&#160;"},
	{"&ndash;",		"&#8211;"},
	{"&ne;",		"&#8800;"},
	{"&ni;",		"&#8715;"},
	{"&not;",		"&#172;"},
	{"&notin;",		"&#8713;"},
	{"&nsub;",		"&#8836;"},
	{"&Ntilde;",	"&#209;"},
	{"&ntilde;",	"&#241;"},
	{"&Nu;",		"&#925;"},
	{"&nu;",		"&#957;"},
	{"&Oacute;",	"&#211;"},
	{"&oacute;",	"&#243;"},
	{"&Ocirc;",		"&#212;"},
	{"&ocirc;",		"&#244;"},
	{"&OElig;",		"&#338;"},
	{"&oelig;",		"&#339;"},
	{"&Ograve;",	"&#210;"},
	{"&ograve;",	"&#242;"},
	{"&oline;",		"&#8254;"},
	{"&Omega;",		"&#937;"},
	{"&omega;",		"&#969;"},
	{"&Omicron;",	"&#927;"},
	{"&omicron;",	"&#959;"},
	{"&oplus;",		"&#8853;"},
	{"&or;",		"&#8744;"},
	{"&ordf;",		"&#170;"},
	{"&ordm;",		"&#186;"},
	{"&Oslash;",	"&#216;"},
	{"&oslash;",	"&#248;"},
	{"&Otilde;",	"&#213;"},
	{"&otilde;",	"&#245;"},
	{"&otimes;",	"&#8855;"},
	{"&Ouml;",		"&#214;"},
	{"&ouml;",		"&#246;"},
	{"&para;",		"&#182;"},
	{"&part;",		"&#8706;"},
	{"&permil;",	"&#8240;"},
	{"&perp;",		"&#8869;"},
	{"&Phi;",		"&#934;"},
	{"&phi;",		"&#966;"},
	{"&Pi;",		"&#928;"},
	{"&pi;",		"&#960;"},
	{"&piv;",		"&#982;"},
	{"&plusmn;",	"&#177;"},
	{"&pound;",		"&#163;"},
	{"&prime;",		"&#8242;"},
	{"&Prime;",		"&#8243;"},
	{"&prod;",		"&#8719;"},
	{"&prop;",		"&#8733;"},
	{"&Psi;",		"&#936;"},
	{"&psi;",		"&#968;"},
	{"&quot;",		"&#34;"},
	{"&radic;",		"&#8730;"},
	{"&raquo;",		"&#187;"},
	{"&rarr;",		"&#8594;"},
	{"&rceil;",		"&#8969;"},
	{"&rdquo;",		"&#8221;"},
	{"&reg;",		"&#174;"},
	{"&rfloor;",	"&#8971;"},
	{"&Rho;",		"&#929;"},
	{"&rho;",		"&#961;"},
	{"&rlm;",		"&#8207;"},
	{"&rsaquo;",	"&#8250;"},
	{"&rsquo;",		"&#8217;"},
	{"&sbquo;",		"&#8218;"},
	{"&Scaron;",	"&#352;"},
	{"&scaron;",	"&#353;"},
	{"&sdot;",		"&#8901;"},
	{"&sect;",		"&#167;"},
	{"&shy;",		"&#173;"},
	{"&Sigma;",		"&#931;"},
	{"&sigma;",		"&#963;"},
	{"&sigmaf;",	"&#962;"},
	{"&sim;",		"&#8764;"},
	{"&spades;",	"&#9824;"},
	{"&sub;",		"&#8834;"},
	{"&sube;",		"&#8838;"},
	{"&sum;",		"&#8721;"},
	{"&sup1;",		"&#185;"},
	{"&sup2;",		"&#178;"},
	{"&sup3;",		"&#179;"},
	{"&sup;",		"&#8835;"},
	{"&supe;",		"&#8839;"},
	{"&szlig;",		"&#223;"},
	{"&Tau;",		"&#932;"},
	{"&tau;",		"&#964;"},
	{"&there4;",	"&#8756;"},
	{"&Theta;",		"&#920;"},
	{"&theta;",		"&#952;"},
	{"&thetasym;",	"&#977;"},
	{"&thinsp;",	"&#8201;"},
	{"&THORN;",		"&#222;"},
	{"&thorn;",		"&#254;"},
	{"&tilde;",		"&#732;"},
	{"&times;",		"&#215;"},
	{"&trade;",		"&#8482;"},
	{"&Uacute;",	"&#218;"},
	{"&uacute;",	"&#250;"},
	{"&uarr;",		"&#8593;"},
	{"&Ucirc;",		"&#219;"},
	{"&ucirc;",		"&#251;"},
	{"&Ugrave;",	"&#217;"},
	{"&ugrave;",	"&#249;"},
	{"&uml;",		"&#168;"},
	{"&upsih;",		"&#978;"},
	{"&Upsilon;",	"&#933;"},
	{"&upsilon;",	"&#965;"},
	{"&Uuml;",		"&#220;"},
	{"&uuml;",		"&#252;"},
	{"&Xi;",		"&#926;"},
	{"&xi;",		"&#958;"},
	{"&Yacute;",	"&#221;"},
	{"&yacute;",	"&#253;"},
	{"&yen;",		"&#165;"},
	{"&yuml;",		"&#255;"},
	{"&Yuml;",		"&#376;"},
	{"&Zeta;",		"&#918;"},
	{"&zeta;",		"&#950;"},
	{"&zwj;",		"&#8205;"},
	{"&zwnj;",		"&#8204;"},
};

const size_t html_special_table_size = sizeof(html_special_table) / sizeof(html_special_table[0]);

const char * html_special_table_lookup(const char * const name) {
	// this should be a iterating-decreasing jump search
	for (int i = 0; i < html_special_table_size; i++) {
		if (!strcmp(name, html_special_table[i][0])) {
			return html_special_table[i][1];
		}
	}
	return NULL;
}

const char * html_special_to_utf8(const char * const special) {
	static std::string r(special);
	trim(r);
	uint32_t i(std::stoi(r));
	std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> conv1;
	r = conv1.to_bytes(i);
	return r.c_str();
}

#define HTML_SPECIAL_HPP
#endif