This is the CHICKEN version of the SRFI 224 Scheme library providing fixnum (integer) maps. For the (more) portable version, see the SRFI repo.
Fixnum maps (fxmappings) are implemented using the big-endian radix (Patricia) tree structure described by Chris Okasaki and Andrew Gill in "Fast Mergeable Integer Maps". These provide fast lookup and set-theoretical operations.
This is free and open-source software released under the MIT/X license. See LICENSE.
Wolfgang Corcoran-Mathe
wcm at sigwinch dot xyzzy minus the zy