gbk.js/src/gbk.js

一个小而快的GBK库,支持浏览器

var GBK = function (gbk_us) {
	var arr_index = 0x8140; //33088;
	var gbk = {
		decode: function (arr) {
			var str = "";
			for (var n = 0, max = arr.length; n < max; n++) {
				var code = arr[n] & 0xff;
				if (code > 0x80 && n + 1 < max) {
					var code1 = arr[n + 1] & 0xff;
					if(code1 >= 0x40){
						code = gbk_us[(code << 8 | code1) - arr_index]
						n++;
					}
				}
				str += String.fromCharCode(code);
			}
			return str;
		},
		encode: function (str) {
			str += '';
			var gbk = [];
			var wh = '?'.charCodeAt(0); //gbk中没有的字符的替换符
			for (var i = 0; i < str.length; i++) {
				var charcode = str.charCodeAt(i);
				if (charcode < 0x80) gbk.push(charcode)
				else {
					var gcode = gbk_us.indexOf(charcode);
					if (~gcode) {
						gcode += arr_index;
						gbk.push(0xFF & (gcode >> 8), 0xFF & gcode);
					} else {
						gbk.push(wh);
					}
				}
			}
			return gbk;
		}
	}
	return gbk;
};
module.exports = GBK;