Index: uspace/lib/posix/ctype.c
===================================================================
--- uspace/lib/posix/ctype.c	(revision a6d908c16a3f2517f780643cb3b1e2f2606ae1f2)
+++ uspace/lib/posix/ctype.c	(revision a35fc17b8b322aa472e7cd73bfb3382b92f62013)
@@ -108,4 +108,26 @@
 }
 
+/**
+ * Checks whether character is ASCII. (obsolete)
+ *
+ * @param c
+ * @return
+ */
+extern int posix_isascii(int c)
+{
+	return c >= 0 && c < 128;
+}
+
+/**
+ * Converts argument to a 7-bit ASCII character. (obsolete)
+ *
+ * @param c
+ * @return
+ */
+extern int posix_toascii(int c)
+{
+	return c & 0x7F;
+}
+
 /** @}
  */
Index: uspace/lib/posix/ctype.h
===================================================================
--- uspace/lib/posix/ctype.h	(revision a6d908c16a3f2517f780643cb3b1e2f2606ae1f2)
+++ uspace/lib/posix/ctype.h	(revision a35fc17b8b322aa472e7cd73bfb3382b92f62013)
@@ -47,4 +47,13 @@
 extern int posix_ispunct(int c);
 
+/* Obsolete Functions and Macros */
+extern int posix_isascii(int c);
+extern int posix_toascii(int c);
+#undef _tolower
+#define _tolower(c) ((c) - 'A' + 'a')
+#undef _toupper
+#define _toupper(c) ((c) - 'a' + 'A')
+
+
 #ifndef LIBPOSIX_INTERNAL
 	#define isxdigit posix_isxdigit
@@ -54,4 +63,7 @@
 	#define isprint posix_isprint
 	#define ispunct posix_ispunct
+	
+	#define isascii posix_isascii
+	#define toascii posix_toascii
 #endif