man ustrupr (3): Replaces all letters with upper case. Allegro game programming library.

ustrupr(3) Replaces all letters with upper case. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

char *ustrupr(char *s);

This function replaces all lower case letters in `s' with upper case letters. Example:

   char buffer[] = "lower case string";
   allegro_message(ustrupr(buffer));

The return value is the value of `s'.