Drizzled Public API Documentation

char.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/char.h>
00023 
00024 namespace drizzled
00025 {
00026 
00027 String *Item_func_char::val_str(String *str)
00028 {
00029   assert(fixed == 1);
00030   str->length(0);
00031   str->set_charset(collation.collation);
00032   for (uint32_t i=0 ; i < arg_count ; i++)
00033   {
00034     int32_t num=(int32_t) args[i]->val_int();
00035     if (!args[i]->null_value)
00036     {
00037       char char_num= (char) num;
00038       if (num&0xFF000000L) {
00039         str->append((char)(num>>24));
00040         goto b2;
00041       } else if (num&0xFF0000L) {
00042     b2:        str->append((char)(num>>16));
00043         goto b1;
00044       } else if (num&0xFF00L) {
00045     b1:        str->append((char)(num>>8));
00046       }
00047       str->append(&char_num, 1);
00048     }
00049   }
00050   str->realloc(str->length());                  // Add end 0 (for Purify)
00051   return check_well_formed_result(str);
00052 }
00053 
00054 } /* namespace drizzled */