Drizzled Public API Documentation

conv_charset.cc
00001 /* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2008 Sun Microsystems, Inc.
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; version 2 of the License.
00009  *
00010  *  This program is distributed in the hope that it will be useful,
00011  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  *  GNU General Public License for more details.
00014  *
00015  *  You should have received a copy of the GNU General Public License
00016  *  along with this program; if not, write to the Free Software
00017  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00018  */
00019 
00020 #include <config.h>
00021 
00022 #include <drizzled/function/str/conv_charset.h>
00023 
00024 namespace drizzled
00025 {
00026 
00027 String *Item_func_conv_charset::val_str(String *str)
00028 {
00029   assert(fixed == 1);
00030   if (use_cached_value)
00031     return null_value ? 0 : &str_value;
00032   String *arg= args[0]->val_str(str);
00033   size_t dummy_errors;
00034   if (!arg)
00035   {
00036     null_value=1;
00037     return 0;
00038   }
00039   null_value= str_value.copy(arg->ptr(),arg->length(),arg->charset(),
00040                              conv_charset, &dummy_errors);
00041   return null_value ? 0 : check_well_formed_result(&str_value);
00042 }
00043 
00044 void Item_func_conv_charset::fix_length_and_dec()
00045 {
00046   collation.set(conv_charset, DERIVATION_IMPLICIT);
00047   max_length = args[0]->max_length*conv_charset->mbmaxlen;
00048 }
00049 
00050 void Item_func_conv_charset::print(String *str)
00051 {
00052   str->append(STRING_WITH_LEN("convert("));
00053   args[0]->print(str);
00054   str->append(STRING_WITH_LEN(" using "));
00055   str->append(conv_charset->csname);
00056   str->append(')');
00057 }
00058 
00059 } /* namespace drizzled */