Bug#44352 UPPER/LOWER function doesn't work correctly

on cp932 and sjis environment.
Problem: case conversion erroneously changes the second bytes
of multi-byte sequences because single-byte functions were
called in a mistake.
Fix: call multi-byte aware functions instead.

mysql-test/r/ctype_cp932_binlog_stm.result

@@ -46,4 +46,12 @@ master-bin.000001	1137	Query	1	1216	use `test`; DROP TABLE t4
 End of 5.0 tests
 SHOW BINLOG EVENTS FROM 364;
 ERROR HY000: Error when executing command SHOW BINLOG EVENTS: Wrong offset or I/O error
+Bug#44352 UPPER/LOWER function doesn't work correctly on cp932 and sjis environment.
+CREATE TABLE t1 (a varchar(16)) character set cp932;
+INSERT INTO t1 VALUES (0x8372835E),(0x8352835E);
+SELECT hex(a), hex(lower(a)), hex(upper(a)) FROM t1 ORDER BY binary(a);
+hex(a)	hex(lower(a))	hex(upper(a))
+8352835E	8352835E	8352835E
+8372835E	8372835E	8372835E
+DROP TABLE t1;
 End of 5.1 tests

mysql-test/r/ctype_sjis.result

@@ -209,3 +209,13 @@ SET NAMES sjis;
 SELECT HEX('佐淘　圭') FROM DUAL;
 HEX('佐淘　圭')
 8DB2939181408C5C
+# Start of 5.1 tests
+Bug#44352 UPPER/LOWER function doesn't work correctly on cp932 and sjis environment.
+CREATE TABLE t1 (a varchar(16)) character set sjis;
+INSERT INTO t1 VALUES (0x8372835E),(0x8352835E);
+SELECT hex(a), hex(lower(a)), hex(upper(a)) FROM t1 ORDER BY binary(a);
+hex(a)	hex(lower(a))	hex(upper(a))
+8352835E	8352835E	8352835E
+8372835E	8372835E	8372835E
+DROP TABLE t1;
+# End of 5.1 tests

mysql-test/t/ctype_cp932_binlog_stm.test

@@ -34,4 +34,10 @@ delimiter ;|
 --error 1220
 SHOW BINLOG EVENTS FROM 364;
 
+--echo Bug#44352 UPPER/LOWER function doesn't work correctly on cp932 and sjis environment.
+CREATE TABLE t1 (a varchar(16)) character set cp932;
+INSERT INTO t1 VALUES (0x8372835E),(0x8352835E);
+SELECT hex(a), hex(lower(a)), hex(upper(a)) FROM t1 ORDER BY binary(a);
+DROP TABLE t1;
+
 --echo End of 5.1 tests

mysql-test/t/ctype_sjis.test

@@ -83,3 +83,13 @@ SET NAMES sjis;
 SELECT HEX('佐淘　圭') FROM DUAL;
 
 # End of 4.1 tests
+
+--echo # Start of 5.1 tests
+
+--echo Bug#44352 UPPER/LOWER function doesn't work correctly on cp932 and sjis environment.
+CREATE TABLE t1 (a varchar(16)) character set sjis;
+INSERT INTO t1 VALUES (0x8372835E),(0x8352835E);
+SELECT hex(a), hex(lower(a)), hex(upper(a)) FROM t1 ORDER BY binary(a);
+DROP TABLE t1;
+
+--echo # End of 5.1 tests

strings/ctype-cp932.c

@@ -5489,10 +5489,10 @@ static MY_CHARSET_HANDLER my_charset_handler=
   my_mb_wc_cp932,	/* mb_wc */
   my_wc_mb_cp932,	/* wc_mb */
   my_mb_ctype_mb,
-  my_caseup_str_8bit,
+  my_caseup_str_mb,
-  my_casedn_str_8bit,
+  my_casedn_str_mb,
-  my_caseup_8bit,
+  my_caseup_mb,
-  my_casedn_8bit,
+  my_casedn_mb,
   my_snprintf_8bit,
   my_long10_to_str_8bit,
   my_longlong10_to_str_8bit,

strings/ctype-sjis.c

@@ -4650,10 +4650,10 @@ static MY_CHARSET_HANDLER my_charset_handler=
   my_mb_wc_sjis,	/* mb_wc */
   my_wc_mb_sjis,	/* wc_mb */
   my_mb_ctype_mb,
-  my_caseup_str_8bit,
+  my_caseup_str_mb,
-  my_casedn_str_8bit,
+  my_casedn_str_mb,
-  my_caseup_8bit,
+  my_caseup_mb,
-  my_casedn_8bit,
+  my_casedn_mb,
   my_snprintf_8bit,
   my_long10_to_str_8bit,
   my_longlong10_to_str_8bit,