fusl/src/ctype/toupper.c

#include <ctype.h>
#include "libc.h"

int toupper(int c) {
  if (islower(c))
    return c & 0x5f;
  return c;
}

int __toupper_l(int c, locale_t l) {
  return toupper(c);
}

weak_alias(__toupper_l, toupper_l);