diff --git a/lithos_c/inc/Lth_stdlib.h b/lithos_c/inc/Lth_stdlib.h
index 3d470c4..c70f8e1 100644
--- a/lithos_c/inc/Lth_stdlib.h
+++ b/lithos_c/inc/Lth_stdlib.h
@@ -33,12 +33,21 @@ __str Lth_strlocal(__str s);
 char *Lth_strealoc(char *p, char const *s);
 char *Lth_strealoc_str(char *p, __str s);
 bool  Lth_strcontains(char const *s, char ch);
+int   Lth_stricmp(char const *s1, char const *s2);
+
+// wcs
+wchar_t *Lth_wcsdup(wchar_t const *s);
+wchar_t *Lth_wcsdupstr(char const *s);
+
+// mbs
+size_t Lth_mbslen(char const *s);
 
 // Print
 void Lth_PrintString(char const *s);
 
 // Hash
 size_t Lth_Hash_char(char const *s);
-size_t Lth_Hash_str(char __str_ars const *s);
+size_t Lth_Hash_str(Lth__strchar *s);
+size_t Lth_Hash_wchar(wchar_t const *s);
 
 #endif//lithos3__Lth_stdlib_h
diff --git a/lithos_c/inc/Lth_types.h b/lithos_c/inc/Lth_types.h
index 1bffc2e..a60e338 100644
--- a/lithos_c/inc/Lth_types.h
+++ b/lithos_c/inc/Lth_types.h
@@ -24,10 +24,14 @@
 
 #define Lth_Pair(typef, types) struct { typef first; types second; }
 
+#define Lth_WithMbState() \
+   __with(mbstate_t state; memset(&state, 0, sizeof(state));)
+
 
 // Type Definitions ----------------------------------------------------------|
 
 typedef int Lth_HID;
+typedef char __str_ars const Lth__strchar;
 
 //
 // Lth_Signal
diff --git a/lithos_c/src/stdlib.c b/lithos_c/src/stdlib.c
index 32df7a2..8c61559 100644
--- a/lithos_c/src/stdlib.c
+++ b/lithos_c/src/stdlib.c
@@ -16,6 +16,7 @@
 
 #include <string.h>
 #include <stdlib.h>
+#include <ctype.h>
 
 #define GenStrHash() \
    if(s == NULL) return 0; \
@@ -126,6 +127,64 @@ bool Lth_strcontains(char const *s, char ch)
    return false;
 }
 
+//
+// Lth_stricmp
+//
+int Lth_stricmp(char const *s1, char const *s2)
+{
+   char a, b;
+   while(*s1 && *s2)
+   {
+      if((a = toupper(*s1)) != (b = toupper(*s2)))
+         break;
+      s1++, s2++;
+   }
+   a = toupper(*s1), b = toupper(*s2);
+   return (int)a - (int)b;
+}
+
+//
+// Lth_wcsdup
+//
+wchar_t *Lth_wcsdup(wchar_t const *s)
+{
+   size_t   len = wcslen(s);
+   wchar_t *ret = malloc(sizeof(wchar_t) * (len + 1));
+   wmemcpy(ret, s, len);
+   ret[len] = '\0';
+   return ret;
+}
+
+//
+// Lth_wcsdupstr
+//
+wchar_t *Lth_wcsdupstr(char const *s)
+{
+   size_t   len = strlen(s);
+   wchar_t *ret = malloc(sizeof(wchar_t) * (len + 1));
+   for(size_t i = 0; i < len; i++) ret[i] = s[i];
+   ret[len] = '\0';
+   return ret;
+}
+
+//
+// Lth_mbslen
+//
+size_t Lth_mbslen(char const *s)
+{
+   size_t ret = 0;
+
+   Lth_WithMbState()
+      for(char const *end = s + strlen(s); s < end; ret++)
+   {
+      int next = mbrlen(s, end - s, &state);
+      if(next < 0)
+         return ret;
+      s += next;
+   }
+   return ret;
+}
+
 //
 // Lth_PrintString
 //
@@ -148,9 +207,31 @@ size_t Lth_Hash_char(char const *s)
 //
 // Lth_Hash_str
 //
-size_t Lth_Hash_str(char __str_ars const *s)
+size_t Lth_Hash_str(Lth__strchar *s)
 {
    GenStrHash();
 }
 
+//
+// Lth_Hash_wchar
+//
+size_t Lth_Hash_wchar(wchar_t const *s)
+{
+   if(s == NULL) return 0;
+
+   size_t ret = 0;
+
+   Lth_WithMbState()
+      for(; *s; s++)
+   {
+      char mb[MB_CUR_MAX];
+      int  conv = wcrtomb(mb, *s, &state);
+      if(conv <= 0) break;
+      for(int i = 0; i < conv; i++)
+         ret = ret * 101 + ((unsigned char)(mb[i]) & 0xff);
+   }
+
+   return ret;
+}
+
 // EOF