Change find_type family to accept const TYPELIB*.

include/mysql_h.ic:
  Change find_type family to accept const TYPELIB*.
  This sort of change can not break the ABI.

include/mysql_h.ic

@@ -638,7 +638,7 @@ extern TYPELIB * copy_typelib(MEM_ROOT * root, TYPELIB * from);
 # 415 "mysql_com.h"
 extern void create_random_string(char * to, unsigned int, struct rand_struct * rand_st);
 # 30 "typelib.h"
-extern int find_type(char * x, TYPELIB * typelib, unsigned int);
+extern int find_type(char * x, const TYPELIB * typelib, unsigned int);
 # 429 "mysql_com.h"
 extern void get_salt_from_password(unsigned char * res, char const * password);
 # 422 "mysql_com.h"

include/typelib.h

@@ -26,7 +26,8 @@ typedef struct st_typelib {	/* Different types saved here */
   unsigned int *type_lengths;
 } TYPELIB;
 
-extern int find_type(char *x,TYPELIB *typelib,unsigned int full_name);
+extern int find_type(const char *x, const TYPELIB *typelib,
+                     unsigned int full_name);
 extern void make_type(char *to,unsigned int nr,TYPELIB *typelib);
 extern const char *get_type(TYPELIB *typelib,unsigned int nr);
 extern TYPELIB *copy_typelib(MEM_ROOT *root, TYPELIB *from);

mysys/typelib.c

@@ -42,7 +42,7 @@
     >0  Offset+1 in typelib for matched string
 */
 
-int find_type(my_string x, TYPELIB *typelib, uint full_name)
+int find_type(const char *x, const TYPELIB *typelib, uint full_name)
 {
   int find,pos,findpos;
   reg1 my_string i;

sql/mysql_priv.h

@@ -1561,8 +1561,10 @@ extern bool check_reserved_words(LEX_STRING *name);
 /* strfunc.cc */
 ulonglong find_set(TYPELIB *lib, const char *x, uint length, CHARSET_INFO *cs,
 		   char **err_pos, uint *err_len, bool *set_warning);
-uint find_type(TYPELIB *lib, const char *find, uint length, bool part_match);
-uint find_type2(TYPELIB *lib, const char *find, uint length, CHARSET_INFO *cs);
+uint find_type(const TYPELIB *lib, const char *find, uint length,
+               bool part_match);
+uint find_type2(const TYPELIB *lib, const char *find, uint length,
+                CHARSET_INFO *cs);
 void unhex_type2(TYPELIB *lib);
 uint check_word(TYPELIB *lib, const char *val, const char *end,
 		const char **end_of_word);

sql/strfunc.cc

@@ -104,7 +104,8 @@ ulonglong find_set(TYPELIB *lib, const char *str, uint length, CHARSET_INFO *cs,
   > 0 position in TYPELIB->type_names +1
 */
 
-uint find_type(TYPELIB *lib, const char *find, uint length, bool part_match)
+uint find_type(const TYPELIB *lib, const char *find, uint length,
+               bool part_match)
 {
   uint found_count=0, found_pos=0;
   const char *end= find+length;
@@ -144,7 +145,8 @@ uint find_type(TYPELIB *lib, const char *find, uint length, bool part_match)
     >0  Offset+1 in typelib for matched string
 */
 
-uint find_type2(TYPELIB *typelib, const char *x, uint length, CHARSET_INFO *cs)
+uint find_type2(const TYPELIB *typelib, const char *x, uint length,
+                CHARSET_INFO *cs)
 {
   int pos;
   const char *j;