man uisspace () - Tells if a character is whitespace. Allegro game programming library.
NAME
uisspace - Tells if a character is whitespace. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int uisspace(int c);
DESCRIPTION
Returns nonzero if `c' is whitespace, that is, carriage return, newline, form feed, tab, vertical tab, or space. Example:
for (counter = 0; counter < ustrlen(text_string); counter++) {
if (uisspace(ugetat(text_string, counter)))
usetat(text_string, counter, '_');
}