You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
981 B
38 lines
981 B
2 years ago
|
var chunk = require('./chunk');
|
||
|
|
var map = require('./map');
|
||
|
|
|
||
|
|
exports = {
|
||
|
|
encode: function(arr) {
|
||
|
|
if (arr.length < 32768) {
|
||
|
|
return String.fromCodePoint.apply(String, arr);
|
||
|
|
}
|
||
|
|
return map(chunk(arr, 32767), function(nums) {
|
||
|
|
return String.fromCodePoint.apply(String, nums);
|
||
|
|
}).join('');
|
||
|
|
},
|
||
|
|
decode: function(str) {
|
||
|
|
var ret = [];
|
||
|
|
var i = 0;
|
||
|
|
var len = str.length;
|
||
|
|
while (i < len) {
|
||
|
|
var c = str.charCodeAt(i++);
|
||
|
|
|
||
|
|
if (c >= 0xd800 && c <= 0xdbff && i < len) {
|
||
|
|
var tail = str.charCodeAt(i++);
|
||
|
|
|
||
|
|
if ((tail & 0xfc00) === 0xdc00) {
|
||
|
|
ret.push(((c & 0x3ff) << 10) + (tail & 0x3ff) + 0x10000);
|
||
|
|
} else {
|
||
|
|
ret.push(c);
|
||
|
|
i--;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
ret.push(c);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = exports;
|