Method readSync

packages/dofs/src/provider.ts:568–590

(
    fd: number,
    buffer: Buffer | Uint8Array,
    offset: number,
    length: number,
    position: number | null,
  )

  }

  readSync(
    fd: number,
    buffer: Buffer | Uint8Array,
    offset: number,
    length: number,
    position: number | null,
  ): number {
    const state = this.#fdOrThrow(fd);
    if (!state.readable) {
      throw createWorkspaceError("EBADF", `fd ${fd} is not readable`);
    }
    const startAt = position ?? state.position;
    const slice = readRangeSyncImpl(this.db, state.path, startAt, length);
    const view =
      buffer instanceof Buffer
        ? buffer
        : Buffer.from(buffer.buffer, buffer.byteOffset, buffer.byteLength);
    view.set(slice, offset);
    if (position === null || position === undefined) {
      state.position = startAt + slice.byteLength;
    }
    return slice.byteLength;
  }

  readRangeSync(path: string, offset: number, length: number): Buffer {
    const slice = readRangeSyncImpl(this.db, path, offset, length);