Drizzled Public API Documentation

alloc_buffer.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/alloc_buffer.h>
00023 
00024 namespace drizzled
00025 {
00026 
00027 String* alloc_buffer(String *res,String *str,String *tmp_value,
00028                             ulong length)
00029 {
00030   if (res->alloced_length() < length)
00031   {
00032     if (str->alloced_length() >= length)
00033     {
00034       (void) str->copy(*res);
00035       str->length(length);
00036       return str;
00037     }
00038     if (tmp_value->alloc(length))
00039       return 0;
00040     (void) tmp_value->copy(*res);
00041     tmp_value->length(length);
00042     return tmp_value;
00043   }
00044   res->length(length);
00045   return res;
00046 }
00047 
00048 } /* namespace drizzled */