separating: there will be libk and libc

libk/ctype.c

@@ -0,0 +1,17 @@
+// Ctype implementation for blankos/libk
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https://github.com/xamidev/blankos
+
+#include <stdint.h>
+#include <stdbool.h>
+
+bool isdigit(char c)
+{
+	return c >= '0' && c <= '9';
+}
+
+bool isspace(char c)
+{
+	return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r';
+}