Function exportString

lib/ffi.js:195–227

(str, data, len, encoding = 'utf8')

}

function exportString(str, data, len, encoding = 'utf8') {
  checkFFIPermission();
  validateString(str, 'string');
  validateString(encoding, 'encoding');
  validateInteger(len, 'len', 0);

  let terminatorSize;

  switch (encoding.toLowerCase()) {
    case 'ucs2':
    case 'ucs-2':
    case 'utf16le':
    case 'utf-16le':
      terminatorSize = 2;
      break;
    default:
      terminatorSize = 1;
      break;
  }

  const sourceBuffer = Buffer.from(str, encoding);
  const requiredLength = sourceBuffer.length + terminatorSize;

  if (len < requiredLength) {
    throw new ERR_OUT_OF_RANGE('len', `>= ${requiredLength}`, len);
  }

  const targetBuffer = toBuffer(data, len, false);
  const dataLength = sourceBuffer.length;

  sourceBuffer.copy(targetBuffer, 0, 0, dataLength);
  targetBuffer.fill(0, dataLength, dataLength + terminatorSize);
}

function exportBuffer(source, data, len) {
  checkFFIPermission();