Here are functions for operating on characters.
— Macro: int SCM_CHARP
Return non-zero iff x is a character value.
— Macro: unsigned int SCM_CHAR
Return the value of
x as a C character. If x is not a
Scheme character, the result is undefined.
— Macro: SCM SCM_MAKE_CHAR
Given a C character c, return its representation as a Scheme