Function byteLength

stackgl_modules/index.js:386–428

(string, encoding)

  return buffer;
};
function byteLength(string, encoding) {
  if (Buffer.isBuffer(string)) {
    return string.length;
  }
  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
    return string.byteLength;
  }
  if (typeof string !== 'string') {
    throw new TypeError('The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' + 'Received type ' + _typeof(string));
  }
  var len = string.length;
  var mustMatch = arguments.length > 2 && arguments[2] === true;
  if (!mustMatch && len === 0) return 0;

  // Use a for loop to avoid recursion
  var loweredCase = false;
  for (;;) {
    switch (encoding) {
      case 'ascii':
      case 'latin1':
      case 'binary':
        return len;
      case 'utf8':
      case 'utf-8':
        return utf8ToBytes(string).length;
      case 'ucs2':
      case 'ucs-2':
      case 'utf16le':
      case 'utf-16le':
        return len * 2;
      case 'hex':
        return len >>> 1;
      case 'base64':
        return base64ToBytes(string).length;
      default:
        if (loweredCase) {
          return mustMatch ? -1 : utf8ToBytes(string).length; // assume utf8
        }
        encoding = ('' + encoding).toLowerCase();
        loweredCase = true;
    }
  }
}
Buffer.byteLength = byteLength;
function slowToString(encoding, start, end) {
  var loweredCase = false;