This code is taken from Dan Bernstein's qhasm and implements a binarycrit-bit (alsa known as PATRICIA) tree for |NUL| terminated strings. Crit-bittrees are underused and it's this author's hope that a good example will aidtheir adoption.Herein is the CWEB source (critbit.w) and the derived files (critbit.pdf andcritbit.c) for those who don't wish to install CWEB and/or TeX.If in doubt, read the PDF file.