fusl/src/ctype/islower.c

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

int islower(int c) {
  return (unsigned)c - 'a' < 26;
}

int __islower_l(int c, locale_t l) {
  return islower(c);
}

weak_alias(__islower_l, islower_l);