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/** @fileOverview Bit array codec implementations.
*
* @author Emily Stark
* @author Mike Hamburg
* @author Dan Boneh
*/
/**
* UTF-8 strings
* @namespace
*/
sjcl.codec.utf8String = {
/** Convert from a bitArray to a UTF-8 string. */
fromBits: function (arr) {
var out = "", bl = sjcl.bitArray.bitLength(arr), i, tmp;
for (i=0; i<bl/8; i++) {
if ((i&3) === 0) {
tmp = arr[i/4];
}
out += String.fromCharCode(tmp >>> 8 >>> 8 >>> 8);
tmp <<= 8;
}
return decodeURIComponent(escape(out));
},
/** Convert from a UTF-8 string to a bitArray. */
toBits: function (str) {
str = unescape(encodeURIComponent(str));
var out = [], i, tmp=0;
for (i=0; i<str.length; i++) {
tmp = tmp << 8 | str.charCodeAt(i);
if ((i&3) === 3) {
out.push(tmp);
tmp = 0;
}
}
if (i&3) {
out.push(sjcl.bitArray.partial(8*(i&3), tmp));
}
return out;
}
};
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