Index: uspace/lib/c/include/ctype.h
===================================================================
--- uspace/lib/c/include/ctype.h	(revision c718bdada0e16b36b6f0f68df54a3ee343f91e49)
+++ uspace/lib/c/include/ctype.h	(revision aec41c815c786936ee5edb382011403392833e23)
@@ -61,4 +61,24 @@
 }
 
+static inline int isblank(int c)
+{
+	return c == ' ' || c == '\t';
+}
+
+static inline int iscntrl(int c)
+{
+	return (c >= 0 && c < 0x20) || c == 0x7E;
+}
+
+static inline int isprint(int c)
+{
+	return c >= 0 && c < 0x80 && !iscntrl(c);
+}
+
+static inline int isgraph(int c)
+{
+	return isprint(c) && c != ' ';
+}
+
 static inline int isspace(int c)
 {
@@ -75,4 +95,16 @@
 		return 0;
 	}
+}
+
+static inline int ispunct(int c)
+{
+	return !isspace(c) && !isalnum(c) && isprint(c);
+}
+
+static inline int isxdigit(int c)
+{
+	return isdigit(c) ||
+	    (c >= 'a' && c <= 'f') ||
+	    (c >= 'A' && c <= 'F');
 }