Drizzled Public API Documentation

conv_charset.cc
1 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
3  *
4  * Copyright (C) 2008 Sun Microsystems, Inc.
5  *
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; version 2 of the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #include <config.h>
21 
22 #include <drizzled/function/str/conv_charset.h>
23 
24 namespace drizzled {
25 
27 {
28  assert(fixed == 1);
29  if (use_cached_value)
30  return null_value ? 0 : &str_value;
31  String *arg= args[0]->val_str(str);
32  if (!arg)
33  {
34  null_value=1;
35  return 0;
36  }
37  null_value= false;
38  str_value.copy(arg->ptr(),arg->length(), conv_charset);
39  return null_value ? 0 : check_well_formed_result(&str_value);
40 }
41 
42 void Item_func_conv_charset::fix_length_and_dec()
43 {
44  collation.set(conv_charset, DERIVATION_IMPLICIT);
45  max_length = args[0]->max_length*conv_charset->mbmaxlen;
46 }
47 
49 {
50  str->append(STRING_WITH_LEN("convert("));
51  args[0]->print(str);
52  str->append(STRING_WITH_LEN(" using "));
53  str->append(conv_charset->csname, strlen(conv_charset->csname));
54  str->append(')');
55 }
56 
57 } /* namespace drizzled */