A simple C library for converting between latitude and longitude in degrees to Maidenhead grid squares, commonly used in ham radio.
This is the only implementation I'm aware of that supports arbitrary precision in encoding or decoding, and the only one in C that doesn't seem completely brain-dead to me. YMMV, hope it's useful.
SSPL, or contact for other options.
Written by tarxvf (then mach327) for the md380tools project and never used.
Split out 2021 by tarxvf for use in OpenRTX and other projects.