1 files changed, 14 insertions, 0 deletions
diff --git a/src/stdlib/strtoull.c b/src/stdlib/strtoull.c
new file mode 100644
index 0000000..20aa7bd
--- /dev/null
+++ b/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;
+}