mirror of https://github.com/moparisthebest/mail
38 lines
843 B
JavaScript
38 lines
843 B
JavaScript
/** @fileOverview Bit array codec implementations.
|
|
*
|
|
* @author Emily Stark
|
|
* @author Mike Hamburg
|
|
* @author Dan Boneh
|
|
*/
|
|
|
|
/** @namespace Arrays of bytes */
|
|
sjcl.codec.bytes = {
|
|
/** Convert from a bitArray to an array of bytes. */
|
|
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.push(tmp >>> 24);
|
|
tmp <<= 8;
|
|
}
|
|
return out;
|
|
},
|
|
/** Convert from an array of bytes to a bitArray. */
|
|
toBits: function (bytes) {
|
|
var out = [], i, tmp=0;
|
|
for (i=0; i<bytes.length; i++) {
|
|
tmp = tmp << 8 | bytes[i];
|
|
if ((i&3) === 3) {
|
|
out.push(tmp);
|
|
tmp = 0;
|
|
}
|
|
}
|
|
if (i&3) {
|
|
out.push(sjcl.bitArray.partial(8*(i&3), tmp));
|
|
}
|
|
return out;
|
|
}
|
|
};
|