Index: uspace/lib/libc/include/string.h
===================================================================
--- uspace/lib/libc/include/string.h	(revision 7ce3cb23f444724ec768a4973b4707c2e29b3d54)
+++ uspace/lib/libc/include/string.h	(revision 4527fb5b9cd99ab3d0607e26e017b7ea0f92d227)
@@ -38,4 +38,12 @@
 #include <mem.h>
 #include <sys/types.h>
+#include <bool.h>
+
+#define U_SPECIAL      '?'
+
+extern wchar_t str_decode(const char *str, size_t *offset, size_t sz);
+extern int chr_encode(const wchar_t ch, char *str, size_t *offset, size_t sz);
+
+extern bool chr_check(const wchar_t ch);
 
 extern int strcmp(const char *, const char *);