String.toZenkaku() ※出来てない

by ethertank

JavaScript

String.prototype.toZenkaku || (String.prototype.toZenkaku = function() {
    var charCode,
        i = 0,
        len = this.length,
        output = "";

    for (; i < len; ++i) {
        charCode = this.charCodeAt(i);
        
        //濁点・半濁点が付いている可能性がある場合、
        if (charCode >= 0x30AD && charCode <= 0x30DD) {
            if(charCode[i+1].toString(16) == "ff9e"){
                output += "゛";
                ++i;
            } else if(charCode[i+1].toString(16) == "ff9f"){
                output += "゜";
                ++i;
            } else {
                output += (charCode >= 0xFF66 && charCode <= 0xFF9F) ? String.fromCharCode(charCode - 0xcecf) : this[i];
            }
        } else {
            output += (charCode >= 0xFF66 && charCode <= 0xFF9F) ? String.fromCharCode(charCode - 0xcecf) : this[i];
        }
    }

    return output;
});

document.write('ｱｲｳｴｵｶｷｸｹｺｻｼｽｾｿﾀﾁﾂﾃﾄﾅﾆﾇﾈﾉﾊﾋﾌﾍﾎﾏﾐﾑﾒﾓﾔﾕﾖﾗﾘﾙﾚﾛﾜｦﾝｶﾞｷﾞｸﾞｹﾞｺﾞﾀﾞﾁﾞﾂﾞﾃﾞﾄﾞﾊﾟﾋﾟﾌﾟﾍﾟﾎﾟﾊﾞﾋﾞﾌﾞﾍﾞﾎﾞｧｨｩｪｫｯｬｭｮ'.toZenkaku());

//ア = 12450

//alert(65393-12450);//52943
//alert(65393..toString(16));//ff71

//alert(52943..toString(16));//cecf


// "ｱ" = 0x00b1
// " " = 0x8340
/*    
var han = 'ｱｲｳｴｵｶｷｸｹｺｻｼｽｾｿﾀﾁﾂﾃﾄﾅﾆﾇﾈﾉﾊﾋﾌﾍﾎﾏﾐﾑﾒﾓﾔﾕﾖﾗﾘﾙﾚﾛﾜｦﾝｶﾞｷﾞｸﾞｹﾞｺﾞﾀﾞﾁﾞﾂﾞﾃﾞﾄﾞﾊﾟﾋﾟﾌﾟﾍﾟﾎﾟﾊﾞﾋﾞﾌﾞﾍﾞﾎﾞｧｨｩｪｫｯｬｭｮ';
var hanc = [];

for(var i = 0; i < han.length; ++i){
    hanc.push("0x" + han.charCodeAt(0).toString(16));
}

alert(hanc);
*/
//document.write(hanc);

//document.write(String.fromCharCode(0xFF66));//ｦ
//document.write(String.fromCharCode(0xFF99));//ﾙ
//document.write(String.fromCharCode(0xFF9F));//ﾟ

//alert("0x" + 65382..toString(16));//ff66
//alert("ヲ".charCodeAt(0).toString(16));//30f2

//alert(0xff66-0x30f2);//52852
//alert("0x" + 52852..toString(16));
    
//alert("ｦ".toZenkaku());
    
//alert("ｦ".charCodeAt(0).toString(16));//ff66
   ...