Drizzled Public API Documentation

character_sets.cc
1 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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4  * Copyright (C) 2010 Sun Microsystems, Inc.
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6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
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14  * GNU General Public License for more details.
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16  * You should have received a copy of the GNU General Public License
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18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <config.h>
22 #include <plugin/collation_dictionary/dictionary.h>
23 
24 using namespace std;
25 using namespace drizzled;
26 
27 CharacterSetsTool::CharacterSetsTool() :
28  plugin::TableFunction("DATA_DICTIONARY", "CHARACTER_SETS")
29 {
30  add_field("CHARACTER_SET_NAME");
31  add_field("DEFAULT_COLLATE_NAME");
32  add_field("DESCRIPTION");
33  add_field("MAXLEN", plugin::TableFunction::NUMBER, 0, false);
34 }
35 
36 CharacterSetsTool::Generator::Generator(Field **arg) :
37  plugin::TableFunction::Generator(arg),
38  is_char_primed(false)
39 {
40 }
41 
42 bool CharacterSetsTool::Generator::checkCharacterSet()
43 {
44  if (character_set() && (character_set()->state & MY_CS_PRIMARY) &&
45  (character_set()->state & MY_CS_AVAILABLE) && not (character_set()->state & MY_CS_HIDDEN))
46  {
47  return false;
48  }
49 
50  return true;
51 }
52 
53 bool CharacterSetsTool::Generator::nextCharacterSetCore()
54 {
55  if (is_char_primed)
56  {
57  character_set_iter++;
58  }
59  else
60  {
61  character_set_iter= all_charsets;
62  is_char_primed= true;
63  }
64 
65  if (character_set_iter == all_charsets+255)
66  return false;
67 
68  if (checkCharacterSet())
69  return false;
70 
71  return true;
72 }
73 
74 bool CharacterSetsTool::Generator::nextCharacterSet()
75 {
76  while (not nextCharacterSetCore())
77  {
78  if (character_set_iter == all_charsets+255)
79  return false;
80  }
81 
82  return true;
83 }
84 
85 bool CharacterSetsTool::Generator::populate()
86 {
87  if (nextCharacterSet())
88  {
89  fill();
90  return true;
91  }
92 
93  return false;
94 }
95 
96 void CharacterSetsTool::Generator::fill()
97 {
98  const charset_info_st * const tmp_cs= character_set_iter[0];
99 
100  /* CHARACTER_SET_NAME */
101  push(tmp_cs->csname);
102 
103  /* DEFAULT_COLLATE_NAME */
104  push(tmp_cs->name);
105 
106  /* DESCRIPTION */
107  push(tmp_cs->comment);
108 
109  /* MAXLEN */
110  push(static_cast<int64_t>(tmp_cs->mbmaxlen));
111 }