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13.3 Scheme bindings for VRR functions

Files: scheme/gl_misc.c,

There are are three ways how to add a new function into the VRR Scheme interface – write it in Scheme, write it in C with special regard to Scheme (manual conversion of arguments from Scheme shape, call the registration function on it) and automatically generate from a common C function. A small number of functions are created in the second way – usually functions with complicated argument patterns or with another complication. They are defined in files in the scheme directory, particularly scheme/gl_misc.c. They usually have the gl_ name prefix and arguments of types SCM. The vast majority of functions are generated automatically using the snarf script (written in GNU AWK, located at build/snarf).