protocol.h
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:6k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifdef USE_PRAGMA_INTERFACE
- #pragma interface /* gcc class implementation */
- #endif
- class i_string;
- class THD;
- typedef struct st_mysql_field MYSQL_FIELD;
- typedef struct st_mysql_rows MYSQL_ROWS;
- class Protocol
- {
- protected:
- THD *thd;
- String *packet;
- String *convert;
- uint field_pos;
- #ifndef DEBUG_OFF
- enum enum_field_types *field_types;
- #endif
- uint field_count;
- #ifndef EMBEDDED_LIBRARY
- bool net_store_data(const char *from, uint length);
- #else
- virtual bool net_store_data(const char *from, uint length);
- char **next_field;
- MYSQL_FIELD *next_mysql_field;
- MEM_ROOT *alloc;
- #endif
- bool store_string_aux(const char *from, uint length,
- CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
- public:
- Protocol() {}
- Protocol(THD *thd_arg) { init(thd_arg); }
- virtual ~Protocol() {}
- void init(THD* thd_arg);
- bool send_fields(List<Item> *list, uint flag);
- bool send_records_num(List<Item> *list, ulonglong records);
- bool store(I_List<i_string> *str_list);
- bool store(const char *from, CHARSET_INFO *cs);
- String *storage_packet() { return packet; }
- inline void free() { packet->free(); }
- #ifndef EMBEDDED_LIBRARY
- bool write();
- #else
- virtual bool write();
- #endif
- inline bool store(uint32 from)
- { return store_long((longlong) from); }
- inline bool store(longlong from)
- { return store_longlong((longlong) from, 0); }
- inline bool store(ulonglong from)
- { return store_longlong((longlong) from, 1); }
- inline bool store(String *str)
- { return store((char*) str->ptr(), str->length(), str->charset()); }
- virtual bool prepare_for_send(List<Item> *item_list)
- {
- field_count=item_list->elements;
- return 0;
- }
- virtual bool flush();
- virtual void prepare_for_resend()=0;
- virtual bool store_null()=0;
- virtual bool store_tiny(longlong from)=0;
- virtual bool store_short(longlong from)=0;
- virtual bool store_long(longlong from)=0;
- virtual bool store_longlong(longlong from, bool unsigned_flag)=0;
- virtual bool store(const char *from, uint length, CHARSET_INFO *cs)=0;
- virtual bool store(const char *from, uint length,
- CHARSET_INFO *fromcs, CHARSET_INFO *tocs)=0;
- virtual bool store(float from, uint32 decimals, String *buffer)=0;
- virtual bool store(double from, uint32 decimals, String *buffer)=0;
- virtual bool store(TIME *time)=0;
- virtual bool store_date(TIME *time)=0;
- virtual bool store_time(TIME *time)=0;
- virtual bool store(Field *field)=0;
- };
- /* Class used for the old (MySQL 4.0 protocol) */
- class Protocol_simple :public Protocol
- {
- public:
- Protocol_simple() {}
- Protocol_simple(THD *thd_arg) :Protocol(thd_arg) {}
- virtual void prepare_for_resend();
- virtual bool store_null();
- virtual bool store_tiny(longlong from);
- virtual bool store_short(longlong from);
- virtual bool store_long(longlong from);
- virtual bool store_longlong(longlong from, bool unsigned_flag);
- virtual bool store(const char *from, uint length, CHARSET_INFO *cs);
- virtual bool store(const char *from, uint length,
- CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
- virtual bool store(TIME *time);
- virtual bool store_date(TIME *time);
- virtual bool store_time(TIME *time);
- virtual bool store(float nr, uint32 decimals, String *buffer);
- virtual bool store(double from, uint32 decimals, String *buffer);
- virtual bool store(Field *field);
- };
- class Protocol_prep :public Protocol
- {
- private:
- uint bit_fields;
- public:
- Protocol_prep() {}
- Protocol_prep(THD *thd_arg) :Protocol(thd_arg) {}
- virtual bool prepare_for_send(List<Item> *item_list);
- virtual void prepare_for_resend();
- #ifdef EMBEDDED_LIBRARY
- virtual bool write();
- bool net_store_data(const char *from, uint length);
- #endif
- virtual bool store_null();
- virtual bool store_tiny(longlong from);
- virtual bool store_short(longlong from);
- virtual bool store_long(longlong from);
- virtual bool store_longlong(longlong from, bool unsigned_flag);
- virtual bool store(const char *from,uint length, CHARSET_INFO *cs);
- virtual bool store(const char *from, uint length,
- CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
- virtual bool store(TIME *time);
- virtual bool store_date(TIME *time);
- virtual bool store_time(TIME *time);
- virtual bool store(float nr, uint32 decimals, String *buffer);
- virtual bool store(double from, uint32 decimals, String *buffer);
- virtual bool store(Field *field);
- };
- class Protocol_cursor :public Protocol_simple
- {
- public:
- MEM_ROOT *alloc;
- MYSQL_FIELD *fields;
- MYSQL_ROWS *data;
- MYSQL_ROWS **prev_record;
- ulong row_count;
- Protocol_cursor() {}
- Protocol_cursor(THD *thd_arg, MEM_ROOT *ini_alloc) :Protocol_simple(thd_arg), alloc(ini_alloc) {}
- bool prepare_for_send(List<Item> *item_list)
- {
- fields= NULL;
- data= NULL;
- prev_record= &data;
- return Protocol_simple::prepare_for_send(item_list);
- }
- bool send_fields(List<Item> *list, uint flag);
- bool write();
- };
- void send_warning(THD *thd, uint sql_errno, const char *err=0);
- void net_printf(THD *thd,uint sql_errno, ...);
- void send_ok(THD *thd, ha_rows affected_rows=0L, ulonglong id=0L,
- const char *info=0);
- void send_eof(THD *thd, bool no_flush=0);
- bool send_old_password_request(THD *thd);
- char *net_store_length(char *packet,uint length);
- char *net_store_data(char *to,const char *from, uint length);
- char *net_store_data(char *to,int32 from);
- char *net_store_data(char *to,longlong from);