diff --git a/inc-c/ufn/ufn_ascii.h b/inc-c/ufn/ufn_ascii.h
new file mode 100644
index 0000000..c712162
--- /dev/null
+++ b/inc-c/ufn/ufn_ascii.h
@@ -0,0 +1,199 @@
+
+#ifndef UFN_ASCII_H
+#define UFN_ASCII_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+bool ufn_is_ascii_lowercase(char character);
+bool ufn_is_ascii_uppercase(char character);
+bool ufn_is_ascii_letter(char character);
+bool ufn_is_ascii_digit(char character);
+bool ufn_is_ascii_sign(char character);
+bool ufn_is_ascii_blank(char character);
+bool ufn_is_ascii_control(char character);
+uint8_t ufn_check_ascii_newline(const char *text, uint32_t remaining);
+
+#ifdef UFN_IMPLEMENTATION
+
+bool ufn_is_ascii_lowercase(char character)
+{
+    if(character < 'a')
+    {
+        return false;
+    }
+    if(character > 'z')
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_uppercase(char character)
+{
+    if(character < 'A')
+    {
+        return false;
+    }
+    if(character > 'Z')
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_letter(char character)
+{
+    if(ufn_is_ascii_uppercase(character))
+    {
+        return true;
+    }
+    if(ufn_is_ascii_lowercase(character))
+    {
+        return true;
+    }
+    return false;
+}
+
+bool ufn_is_ascii_digit(char character)
+{
+    if(character < '0')
+    {
+        return false;
+    }
+    if(character > '9')
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_sign_1(char character)
+{
+    if(character < 0x21)
+    {
+        return false;
+    }
+    if(character > 0x2f)
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_sign_2(char character)
+{
+
+    if(character < 0x3a)
+    {
+        return false;
+    }
+    if(character > 0x40)
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_sign_3(char character)
+{
+    if(character < 0x5b)
+    {
+        return false;
+    }
+    if(character > 0x60)
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_sign_4(char character)
+{
+    if(character < 0x7b)
+    {
+        return false;
+    }
+    if(character > 0x7e)
+    {
+        return false;
+    }
+    return true;
+}
+
+bool ufn_is_ascii_sign(char character)
+{
+    if(ufn_is_ascii_sign_1(character))
+    {
+        return true;
+    }
+    if(ufn_is_ascii_sign_2(character))
+    {
+        return true;
+    }
+    if(ufn_is_ascii_sign_3(character))
+    {
+        return true;
+    }
+    if(ufn_is_ascii_sign_4(character))
+    {
+        return true;
+    }
+    return false;
+}
+
+bool ufn_is_ascii_blank(char character)
+{
+    if(character == ' ')
+    {
+        return true;
+    }
+    if(character == '\t')
+    {
+        return true;
+    }
+    return false;
+}
+
+bool ufn_is_ascii_control(char character)
+{
+    if(character < 32)
+    {
+        return true;
+    }
+    if(character == 127)
+    {
+        return true;
+    }
+    return false;
+}
+
+uint8_t ufn_check_ascii_newline(const char *text, uint32_t remaining)
+{
+    if(remaining == 0)
+    {
+        return 0;
+    }
+    if(remaining < 2)
+    {
+        if(text[0] == '\n')
+        {
+            return 1;
+        }
+        return 0;
+    }
+    uint8_t length = 0;
+    if(text[0] == '\r')
+    {
+        length = 1;
+    }
+    if(text[length] == '\r')
+    {
+        ++length;
+    }
+    return length;
+}
+
+#endif // UFN_IMPLEMENTATION
+
+#endif // UFN_ASCII_H