summaryrefslogtreecommitdiff
path: root/sql/protocol.h
blob: c58de68289f7b94e90d90211e7938c03b9a80d33 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
#ifndef PROTOCOL_INCLUDED
#define PROTOCOL_INCLUDED

/* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.

   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; version 2 of the License.

   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifdef USE_PRAGMA_INTERFACE
#pragma interface			/* gcc class implementation */
#endif

#include "sql_error.h"
#include "my_decimal.h"                         /* my_decimal */

class i_string;
class Field;
class THD;
class Item_param;
typedef struct st_mysql_field MYSQL_FIELD;
typedef struct st_mysql_rows MYSQL_ROWS;

class Protocol
{
protected:
  THD	 *thd;
  String *packet;
  /* Used by net_store_data() for charset conversions */
  String *convert;
  uint field_pos;
#ifndef DBUG_OFF
  enum enum_field_types *field_types;
#endif
  uint field_count;
#ifndef EMBEDDED_LIBRARY
  bool net_store_data(const uchar *from, size_t length);
  bool net_store_data_cs(const uchar *from, size_t length,
                      CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
#else
  virtual bool net_store_data(const uchar *from, size_t length);
  virtual bool net_store_data_cs(const uchar *from, size_t length,
                      CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
  char **next_field;
  MYSQL_FIELD *next_mysql_field;
  MEM_ROOT *alloc;
#endif
  /* 
    The following two are low-level functions that are invoked from
    higher-level store_xxx() funcs.  The data is stored into this->packet.
  */
  bool store_string_aux(const char *from, size_t length,
                        CHARSET_INFO *fromcs, CHARSET_INFO *tocs);

  virtual bool send_ok(uint server_status, uint statement_warn_count,
                       ulonglong affected_rows, ulonglong last_insert_id,
                       const char *message);

  virtual bool send_eof(uint server_status, uint statement_warn_count);

  virtual bool send_error(uint sql_errno, const char *err_msg,
                          const char *sql_state);

public:
  Protocol() {}
  Protocol(THD *thd_arg) { init(thd_arg); }
  virtual ~Protocol() {}
  void init(THD* thd_arg);

  enum { SEND_NUM_ROWS= 1, SEND_DEFAULTS= 2, SEND_EOF= 4 };
  virtual bool send_result_set_metadata(List<Item> *list, uint flags);
  bool send_result_set_row(List<Item> *row_items);

  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(); }
  virtual bool write();
  inline  bool store(int from)
  { return store_long((longlong) from); }
  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(uint num_columns)
  {
    field_count= num_columns;
    return 0;
  }
  virtual bool flush();
  virtual void end_partial_result_set(THD *thd);
  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_decimal(const my_decimal *)=0;
  virtual bool store(const char *from, size_t length, CHARSET_INFO *cs)=0;
  virtual bool store(const char *from, size_t 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(MYSQL_TIME *time, int decimals)=0;
  virtual bool store_date(MYSQL_TIME *time)=0;
  virtual bool store_time(MYSQL_TIME *time, int decimals)=0;
  virtual bool store(Field *field)=0;

  virtual bool send_out_parameters(List<Item_param> *sp_params)=0;
#ifdef EMBEDDED_LIBRARY
  int begin_dataset();
  virtual void remove_last_row() {}
#else
  void remove_last_row() {}
#endif
  enum enum_protocol_type
  {
    /*
      Before adding a new type, please make sure
      there is enough storage for it in Query_cache_query_flags.
    */
    PROTOCOL_TEXT= 0, PROTOCOL_BINARY= 1, PROTOCOL_LOCAL= 2
  };
  virtual enum enum_protocol_type type()= 0;

  void end_statement();
};


/** Class used for the old (MySQL 4.0 protocol). */

class Protocol_text :public Protocol
{
public:
  Protocol_text() {}
  Protocol_text(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_decimal(const my_decimal *);
  virtual bool store(const char *from, size_t length, CHARSET_INFO *cs);
  virtual bool store(const char *from, size_t length,
  		     CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
  virtual bool store(MYSQL_TIME *time, int decimals);
  virtual bool store_date(MYSQL_TIME *time);
  virtual bool store_time(MYSQL_TIME *time, int decimals);
  virtual bool store(float nr, uint32 decimals, String *buffer);
  virtual bool store(double from, uint32 decimals, String *buffer);
  virtual bool store(Field *field);

  virtual bool send_out_parameters(List<Item_param> *sp_params);
#ifdef EMBEDDED_LIBRARY
  void remove_last_row();
#endif
  virtual enum enum_protocol_type type() { return PROTOCOL_TEXT; };
};


class Protocol_binary :public Protocol
{
private:
  uint bit_fields;
public:
  Protocol_binary() {}
  Protocol_binary(THD *thd_arg) :Protocol(thd_arg) {}
  virtual bool prepare_for_send(uint num_columns);
  virtual void prepare_for_resend();
#ifdef EMBEDDED_LIBRARY
  virtual bool write();
  bool net_store_data(const uchar *from, size_t length);
  bool net_store_data_cs(const uchar *from, size_t length,
                      CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
#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_decimal(const my_decimal *);
  virtual bool store(const char *from, size_t length, CHARSET_INFO *cs);
  virtual bool store(const char *from, size_t length,
  		     CHARSET_INFO *fromcs, CHARSET_INFO *tocs);
  virtual bool store(MYSQL_TIME *time, int decimals);
  virtual bool store_date(MYSQL_TIME *time);
  virtual bool store_time(MYSQL_TIME *time, int decimals);
  virtual bool store(float nr, uint32 decimals, String *buffer);
  virtual bool store(double from, uint32 decimals, String *buffer);
  virtual bool store(Field *field);

  virtual bool send_out_parameters(List<Item_param> *sp_params);

  virtual enum enum_protocol_type type() { return PROTOCOL_BINARY; };
};

void send_warning(THD *thd, uint sql_errno, const char *err=0);
bool net_send_error(THD *thd, uint sql_errno, const char *err,
                    const char* sqlstate);
void net_send_progress_packet(THD *thd);
uchar *net_store_data(uchar *to,const uchar *from, size_t length);
uchar *net_store_data(uchar *to,int32 from);
uchar *net_store_data(uchar *to,longlong from);

#endif /* PROTOCOL_INCLUDED */