Use of new num->str functions

fix in ucs2 charset

sql/field.cc

@@ -3778,9 +3778,11 @@ int Field_string::store(double nr)
 
 int Field_string::store(longlong nr)
 {
-  char buff[22];
-  char *end=longlong10_to_str(nr,buff,-10);
-  return Field_string::store(buff,(uint) (end-buff), default_charset_info);
+  char buff[64];
+  int  l;
+  CHARSET_INFO *cs=charset();
+  l=cs->ll10tostr(cs,buff,sizeof(buff),-10,nr);
+  return Field_string::store(buff,(uint)l,cs);
 }
 
 
@@ -3975,9 +3977,11 @@ int Field_varstring::store(double nr)
 
 int Field_varstring::store(longlong nr)
 {
-  char buff[22];
-  char *end=longlong10_to_str(nr,buff,-10);
-  return Field_varstring::store(buff,(uint) (end-buff), default_charset_info);
+  char buff[64];
+  int  l;
+  CHARSET_INFO *cs=charset();
+  l=cs->ll10tostr(cs,buff,sizeof(buff),-10,nr);
+  return Field_varstring::store(buff,(uint)l,cs);
 }
 
 

sql/item_sum.cc

@@ -108,9 +108,7 @@ Item_sum_int::val_str(String *str)
   longlong nr=val_int();
   if (null_value)
     return 0;
-  char buff[21];
-  uint length= (uint) (longlong10_to_str(nr,buff,-10)-buff);
-  str->copy(buff,length,thd_charset());
+  str->set(nr,thd_charset());
   return str;
 }
 

strings/ctype-utf8.c

@@ -3055,8 +3055,8 @@ CHARSET_INFO my_charset_ucs2 =
     my_hash_sort_ucs2,	/* hash_sort    */
     0,
     my_snprintf_ucs2,
-    my_l10tostr_8bit,
-    my_ll10tostr_8bit,
+    my_l10tostr_ucs2,
+    my_ll10tostr_ucs2,
     my_strntol_ucs2,
     my_strntoul_ucs2,
     my_strntoll_ucs2,