This library defines Racket tools for manipulating ASCII string. It will eventually be moved out of Cur; do not rely on it.

Returns #t when c is valid as a 7-bit ASCII character, and #f otherwise.

Returns #t when str contains only characters that are valid as a 7-bit ASCII character, and #f otherwise.

Converts b into a bit-vector of a length 7, interpreted as a ASCII character; the sign bit of b is ignored.

Converts a bv of length 7, interpreted as an ASCII character, into a byte.