Fixes during review

mysql-test/r/select.result:
  Better error message
mysql-test/t/select.test:
  Better error message
sql/hostname.cc:
  Join identical code
sql/sql_yacc.yy:
  Combine code (and get a better error message)
strings/ctype-ucs2.c:
  Cast pointer differencess

mysql-test/r/select.result

@@ -2451,7 +2451,7 @@ a
 select distinct distinct * from t1;
 a
 select all distinct * from t1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'distinct * from t1' at line 1
+ERROR HY000: Incorrect usage of ALL and DISTINCT
 select distinct all * from t1;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'all * from t1' at line 1
+ERROR HY000: Incorrect usage of ALL and DISTINCT
 drop table t1;

mysql-test/t/select.test

@@ -1987,9 +1987,9 @@ drop table t1;
 create table t1 (a int(11));
 select all all * from t1;
 select distinct distinct * from t1;
---error 1064
+--error 1221
 select all distinct * from t1;
---error 1064
+--error 1221
 select distinct all * from t1;
 drop table t1;
 

sql/hostname.cc

@@ -209,8 +209,8 @@ my_string ip_to_hostname(struct in_addr *in, uint *errors)
     DBUG_PRINT("error",("gethostbyaddr returned %d",errno));
 
     if (errno == HOST_NOT_FOUND || errno == NO_DATA)
-	add_wrong_ip(in); /* only cache negative responses, not failures */
-
+      goto add_wrong_ip_and_return;
+    /* Failure, don't cache responce */
     DBUG_RETURN(0);
   }
   if (!hp->h_name[0])				// Don't allow empty hostnames

sql/sql_yacc.yy

@@ -2467,7 +2467,14 @@ select_from:
 
 select_options:
 	/* empty*/
-	| select_option_list;
+	| select_option_list
+	  {
+	    if (test_all_bits(Select->options, SELECT_ALL | SELECT_DISTINCT))
+	    {
+	      net_printf(Lex->thd, ER_WRONG_USAGE, "ALL", "DISTINCT");
+              YYABORT;
+	    }
+          }
 
 select_option_list:
 	select_option_list select_option
@@ -2481,15 +2488,7 @@ select_option:
 	      YYABORT;
 	    Lex->lock_option= TL_READ_HIGH_PRIORITY;
 	  }
-	| DISTINCT
-	  {
-            if (Select->options & SELECT_ALL)
-            {
-              yyerror(ER(ER_SYNTAX_ERROR));
-              YYABORT;
-            }
-            Select->options|= SELECT_DISTINCT; 
-	  }
+	| DISTINCT         { Select->options|= SELECT_DISTINCT; }
 	| SQL_SMALL_RESULT { Select->options|= SELECT_SMALL_RESULT; }
 	| SQL_BIG_RESULT { Select->options|= SELECT_BIG_RESULT; }
 	| SQL_BUFFER_RESULT
@@ -2509,15 +2508,7 @@ select_option:
 	  {
 	    Lex->select_lex.options|= OPTION_TO_QUERY_CACHE;
 	  }
-	| ALL
-	  {
-            if (Select->options & SELECT_DISTINCT)
-            {
-              yyerror(ER(ER_SYNTAX_ERROR));
-              YYABORT;
-            }
-            Select->options|= SELECT_ALL; 
-	  }
+	| ALL		    { Select->options|= SELECT_ALL; }
 	;
 
 select_lock_type:

strings/ctype-ucs2.c

@@ -1251,7 +1251,7 @@ static
 uint my_numchars_ucs2(CHARSET_INFO *cs __attribute__((unused)),
 		      const char *b, const char *e)
 {
-  return (e-b)/2;
+  return (uint) (e-b)/2;
 }
 
 
@@ -1261,7 +1261,8 @@ uint my_charpos_ucs2(CHARSET_INFO *cs __attribute__((unused)),
 		     const char *e  __attribute__((unused)),
 		     uint pos)
 {
-  return pos > e - b ? e - b + 2 : pos * 2;
+  uint string_length= (uint) (e - b);
+  return pos > string_length ? string_length + 2 : pos * 2;
 }
 
 
@@ -1270,7 +1271,8 @@ uint my_well_formed_len_ucs2(CHARSET_INFO *cs __attribute__((unused)),
                              const char *b, const char *e,
                              uint nchars, int *error)
 {
-  uint nbytes= (e-b) & ~ (uint)1;
+  /* Ensure string length is dividable with 2 */
+  uint nbytes= ((uint) (e-b)) & ~(uint) 1;
   *error= 0;
   nchars*= 2;
   return min(nbytes, nchars);