Function getStringConversionPointer

lib/internal/ffi/fast-api.js:82–118

(owner, value, index)

}

function getStringConversionPointer(owner, value, index) {
  const size = value.length * 3 + 1;
  let buffers = owner[kStringConversionBuffer];
  if (buffers === undefined) {
    buffers = [];
    ObjectDefineProperty(owner, kStringConversionBuffer, {
      __proto__: null,
      configurable: false,
      enumerable: false,
      writable: false,
      value: buffers,
    });
  }
  let entry = buffers[index];
  if (entry !== undefined && entry.string === value) {
    return entry.pointer;
  }
  if (StringPrototypeIncludes(value, '\0')) {
    throwFFIArgError(`Argument ${index} must not contain null bytes`);
  }
  if (entry === undefined || entry.buffer.length < size) {
    const buffer = Buffer.allocUnsafe(size);
    entry = {
      __proto__: null,
      buffer,
      pointer: getRawPointer(buffer),
      string: undefined,
    };
    buffers[index] = entry;
  }

  const buffer = entry.buffer;
  const written = buffer.write(value, 0, size - 1, 'utf8');
  buffer[written] = 0;
  entry.string = value;
  return entry.pointer;
}

function convertPointerArg(type, value, owner, index) {
  if (needsNullPointerConversion(type) &&