bug3
[aidenligne_francais_universite.git] / fluxbb / include / dblayer / sqlite.php
1 <?php
2 /***********************************************************************
3
4 Copyright (C) 2002-2005 Rickard Andersson (rickard@punbb.org)
5
6 This file is part of PunBB.
7
8 PunBB is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
12
13 PunBB is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 MA 02111-1307 USA
22
23 ************************************************************************/
24
25
26 // Make sure we have built in support for SQLite
27 if (!function_exists('sqlite_open'))
28 exit('This PHP environment doesn\'t have SQLite support built in. SQLite support is required if you want to use a SQLite database to run this forum. Consult the PHP documentation for further assistance.');
29
30
31 class DBLayer
32 {
33 var $prefix;
34 var $link_id;
35 var $query_result;
36 var $in_transaction = 0;
37
38 var $saved_queries = array();
39 var $num_queries = 0;
40
41 var $error_no = false;
42 var $error_msg = 'Unknown';
43
44
45 function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
46 {
47 // Prepend $db_name with the path to the forum root directory
48 $db_name = PUN_ROOT.$db_name;
49
50 $this->prefix = $db_prefix;
51
52 if (!file_exists($db_name))
53 {
54 @touch($db_name);
55 @chmod($db_name, 0666);
56 if (!file_exists($db_name))
57 error('Unable to create new database \''.$db_name.'\'. Permission denied', __FILE__, __LINE__);
58 }
59
60 if (!is_readable($db_name))
61 error('Unable to open database \''.$db_name.'\' for reading. Permission denied', __FILE__, __LINE__);
62
63 if (!is_writable($db_name))
64 error('Unable to open database \''.$db_name.'\' for writing. Permission denied', __FILE__, __LINE__);
65
66 if ($p_connect)
67 $this->link_id = @sqlite_popen($db_name, 0666, $sqlite_error);
68 else
69 $this->link_id = @sqlite_open($db_name, 0666, $sqlite_error);
70
71 if (!$this->link_id)
72 error('Unable to open database \''.$db_name.'\'. SQLite reported: '.$sqlite_error, __FILE__, __LINE__);
73 else
74 return $this->link_id;
75 }
76
77
78 function start_transaction()
79 {
80 ++$this->in_transaction;
81
82 return (@sqlite_query($this->link_id, 'BEGIN')) ? true : false;
83 }
84
85
86 function end_transaction()
87 {
88 --$this->in_transaction;
89
90 if (@sqlite_query($this->link_id, 'COMMIT'))
91 return true;
92 else
93 {
94 @sqlite_query($this->link_id, 'ROLLBACK');
95 return false;
96 }
97 }
98
99
100 function query($sql, $unbuffered = false)
101 {
102 if (defined('PUN_SHOW_QUERIES'))
103 $q_start = get_microtime();
104
105 if ($unbuffered)
106 $this->query_result = @sqlite_unbuffered_query($this->link_id, $sql);
107 else
108 $this->query_result = @sqlite_query($this->link_id, $sql);
109
110 if ($this->query_result)
111 {
112 if (defined('PUN_SHOW_QUERIES'))
113 $this->saved_queries[] = array($sql, sprintf('%.5f', get_microtime() - $q_start));
114
115 ++$this->num_queries;
116
117 return $this->query_result;
118 }
119 else
120 {
121 if (defined('PUN_SHOW_QUERIES'))
122 $this->saved_queries[] = array($sql, 0);
123
124 $this->error_no = @sqlite_last_error($this->link_id);
125 $this->error_msg = @sqlite_error_string($this->error_no);
126
127 if ($this->in_transaction)
128 @sqlite_query($this->link_id, 'ROLLBACK');
129
130 --$this->in_transaction;
131
132 return false;
133 }
134 }
135
136
137 function result($query_id = 0, $row = 0)
138 {
139 if ($query_id)
140 {
141 if ($row != 0)
142 @sqlite_seek($query_id, $row);
143
144 return @current(@sqlite_current($query_id));
145 }
146 else
147 return false;
148 }
149
150
151 function fetch_assoc($query_id = 0)
152 {
153 if ($query_id)
154 {
155 $cur_row = @sqlite_fetch_array($query_id, SQLITE_ASSOC);
156 if ($cur_row)
157 {
158 // Horrible hack to get rid of table names and table aliases from the array keys
159 while (list($key, $value) = @each($cur_row))
160 {
161 $dot_spot = strpos($key, '.');
162 if ($dot_spot !== false)
163 {
164 unset($cur_row[$key]);
165 $key = substr($key, $dot_spot+1);
166 $cur_row[$key] = $value;
167 }
168 }
169 }
170
171 return $cur_row;
172 }
173 else
174 return false;
175 }
176
177
178 function fetch_row($query_id = 0)
179 {
180 return ($query_id) ? @sqlite_fetch_array($query_id, SQLITE_NUM) : false;
181 }
182
183
184 function num_rows($query_id = 0)
185 {
186 return ($query_id) ? @sqlite_num_rows($query_id) : false;
187 }
188
189
190 function affected_rows()
191 {
192 return ($this->query_result) ? @sqlite_changes($this->query_result) : false;
193 }
194
195
196 function insert_id()
197 {
198 return ($this->link_id) ? @sqlite_last_insert_rowid($this->link_id) : false;
199 }
200
201
202 function get_num_queries()
203 {
204 return $this->num_queries;
205 }
206
207
208 function get_saved_queries()
209 {
210 return $this->saved_queries;
211 }
212
213
214 function free_result($query_id = false)
215 {
216 return true;
217 }
218
219
220 function escape($str)
221 {
222 return is_array($str) ? '' : sqlite_escape_string($str);
223 }
224
225
226 function error()
227 {
228 $result['error_sql'] = @current(@end($this->saved_queries));
229 $result['error_no'] = $this->error_no;
230 $result['error_msg'] = $this->error_msg;
231
232 return $result;
233 }
234
235
236 function close()
237 {
238 if ($this->link_id)
239 {
240 if ($this->in_transaction)
241 {
242 if (defined('PUN_SHOW_QUERIES'))
243 $this->saved_queries[] = array('COMMIT', 0);
244
245 @sqlite_query($this->link_id, 'COMMIT');
246 }
247
248 return @sqlite_close($this->link_id);
249 }
250 else
251 return false;
252 }
253 }