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40 lines
940 B
JavaScript
40 lines
940 B
JavaScript
/** @fileOverview Bit array codec implementations.
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*
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* @author Emily Stark
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* @author Mike Hamburg
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* @author Dan Boneh
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*/
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/** @namespace UTF-8 strings */
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sjcl.codec.utf8String = {
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/** Convert from a bitArray to a UTF-8 string. */
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fromBits: function (arr) {
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var out = "", bl = sjcl.bitArray.bitLength(arr), i, tmp;
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for (i=0; i<bl/8; i++) {
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if ((i&3) === 0) {
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tmp = arr[i/4];
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}
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out += String.fromCharCode(tmp >>> 24);
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tmp <<= 8;
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}
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return decodeURIComponent(escape(out));
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},
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/** Convert from a UTF-8 string to a bitArray. */
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toBits: function (str) {
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str = unescape(encodeURIComponent(str));
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var out = [], i, tmp=0;
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for (i=0; i<str.length; i++) {
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tmp = tmp << 8 | str.charCodeAt(i);
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if ((i&3) === 3) {
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out.push(tmp);
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tmp = 0;
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}
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}
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if (i&3) {
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out.push(sjcl.bitArray.partial(8*(i&3), tmp));
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}
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return out;
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}
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};
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