Function toByteArray

docs/app/js/sanddance-app.js:114122–114148

(b64)

    return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
}
function toByteArray(b64) {
    var tmp;
    var lens = getLens(b64);
    var validLen = lens[0];
    var placeHoldersLen = lens[1];
    var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));
    var curByte = 0;
    // if there are placeholders, only get up to the last complete 4 chars
    var len2 = placeHoldersLen > 0 ? validLen - 4 : validLen;
    var i1;
    for(i1 = 0; i1 < len2; i1 += 4){
        tmp = revLookup[b64.charCodeAt(i1)] << 18 | revLookup[b64.charCodeAt(i1 + 1)] << 12 | revLookup[b64.charCodeAt(i1 + 2)] << 6 | revLookup[b64.charCodeAt(i1 + 3)];
        arr[curByte++] = tmp >> 16 & 0xFF;
        arr[curByte++] = tmp >> 8 & 0xFF;
        arr[curByte++] = tmp & 0xFF;
    }
    if (placeHoldersLen === 2) {
        tmp = revLookup[b64.charCodeAt(i1)] << 2 | revLookup[b64.charCodeAt(i1 + 1)] >> 4;
        arr[curByte++] = tmp & 0xFF;
    }
    if (placeHoldersLen === 1) {
        tmp = revLookup[b64.charCodeAt(i1)] << 10 | revLookup[b64.charCodeAt(i1 + 1)] << 4 | revLookup[b64.charCodeAt(i1 + 2)] >> 2;
        arr[curByte++] = tmp >> 8 & 0xFF;
        arr[curByte++] = tmp & 0xFF;
    }
    return arr;
}
function tripletToBase64(num) {
    return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F];
}