initial check-in, version 0.5.0

src/stdlib/strtoull.c

@@ -0,0 +1,14 @@
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <limits.h>
+
+unsigned long long strtoull(const char *s, char **p, int base)
+{
+	uintmax_t x = strtoumax(s, p, base);
+	if (x > ULLONG_MAX) {
+		errno = ERANGE;
+		return ULLONG_MAX;
+	}
+	return x;
+}