1 files changed, 15 insertions, 0 deletions
diff --git a/src/stdlib/wcstoul.c b/src/stdlib/wcstoul.c
new file mode 100644
index 00000000..e39faafe
--- /dev/null
+++ b/src/stdlib/wcstoul.c
@@ -0,0 +1,15 @@
+#include <wchar.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <limits.h>
+
+unsigned long wcstoul(const wchar_t *s, wchar_t **p, int base)
+{
+	uintmax_t x = wcstoumax(s, p, base);
+	if (x > ULONG_MAX) {
+		errno = ERANGE;
+		return ULONG_MAX;
+	}
+	return x;
+}