Extra SRFI Libraries

While Racket comes with a number of SRFI libraries, it’s missing quite a lot of useful ones. This collection adds some.

A note on licensings: Most of the included SRFIs are the reference implementations adapted to Racket, and retain the original licenses.

1 SRFI-112 Environment Inquiry

Reference documentation.

Notes: (os-version) always returns #f, but the other functions are all implemented.

2 SRFI-141 Integer division

Reference documentation.

Notes:

The functions in the typed version are constrained to only take and return exact integers. The regular package’s will accept inexact integers.

3 SRFI-151 Bitwise Operations

Reference documentation.

Notes:

Written in Typed Racket. Hopefully the type signatures should be obvious and intuitive. If performance matters, code that uses these routines should also be written in Typed Racket.

4 SRFI-158 Generators and Accumulators

Reference documentation. Also includes SRFI-221 Generator/accumulator sub-library routines.

These generators are not compatible with the ones in "racket/generator". There is an adaptor function provided to wrap Racket generators in SRFI-158 ones, but beware of conflicting generator identifiers in the two modules.

5 SRFI-175 ASCII character library

Reference documentation.

Notes:

What the SRFI calls a bytevector is what Racket calls a byte string.

6 SRFI-190 Coroutine Generators

Reference documentation.

Notes: The yield syntax conflicts with racket/generator.

7 SRFI-208 NaN Procedures

Reference documentation.

Notes:

Currently only works with double-precision flonums, though the SRFI allows for other floating point types. While Racket BC supports single precision flonums, Racket CS doesn’t, and I don’t have a version of CS installed that supports extflonums for testing. If either changes I might go back and add support for those types.

8 SRFI-223 Generalized binary search procedures

Reference documentation.

SRFI-223 procedures specialized for byte strings.