1# Table of contents 2 3| File | Purpose | 4|------------------------------------------------------------------------------------|-----------------------------------------------------------------| 5| [bitfields.d](https://github.com/dlang/dmd/blob/master/src/dmd/common/bitfields.d) | Pack multiple boolean fields into bit fields | 6| [file.d](https://github.com/dlang/dmd/blob/master/src/dmd/common/file.d) | Functions and objects dedicated to file I/O and management | 7| [outbuffer.d](https://github.com/dlang/dmd/blob/master/src/dmd/common/outbuffer.d) | An expandable buffer in which you can write text or binary data | 8| [string.d](https://github.com/dlang/dmd/blob/master/src/dmd/common/string.d) | Common string functions including filename manipulation | 9