--- /dev/null
+#ifndef _CTYPE_H
+#define _CTYPE_H
+
+/** @file
+ *
+ * Character types
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#define isdigit(c) ((c) >= '0' && (c) <= '9')
+#define islower(c) ((c) >= 'a' && (c) <= 'z')
+#define isupper(c) ((c) >= 'A' && (c) <= 'Z')
+#define isxdigit(c) (isdigit(c) || ((c) >= 'A' && (c) <= 'F') || ((c) >= 'a' && (c) <= 'f'))
+#define isprint(c) ((c) >= ' ' && (c) <= '~' )
+
+static inline unsigned char tolower(unsigned char c)
+{
+ if (isupper(c))
+ c -= 'A'-'a';
+ return c;
+}
+
+static inline unsigned char toupper(unsigned char c)
+{
+ if (islower(c))
+ c -= 'a'-'A';
+ return c;
+}
+
+extern int isspace ( int c );
+
+#endif /* _CTYPE_H */