Drizzled Public API Documentation

hello_world.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/strfunc.h>
00023 #include <drizzled/item/func.h>
00024 #include <drizzled/plugin.h>
00025 #include <drizzled/plugin/function.h>
00026 
00027 #include <string>
00028 
00029 using namespace std;
00030 using namespace drizzled;
00031 
00032 class Item_func_hello_world : public Item_str_func
00033 {
00034 public:
00035   Item_func_hello_world() : Item_str_func() {}
00036   const char *func_name() const { return "hello_world"; }
00037   String *val_str(String* s) {
00038     s->set(STRING_WITH_LEN("Hello World!"),system_charset_info);
00039     return s;
00040   }
00041   void fix_length_and_dec() {
00042     max_length=strlen("Hello World!");
00043   }
00044 };
00045 
00046 plugin::Create_function<Item_func_hello_world> *hello_world_udf= NULL;
00047 
00048 static int hello_world_plugin_init(drizzled::module::Context &context)
00049 {
00050   hello_world_udf=
00051     new plugin::Create_function<Item_func_hello_world>("hello_world");
00052   context.add(hello_world_udf);
00053 
00054   return 0;
00055 }
00056 
00057 DRIZZLE_DECLARE_PLUGIN
00058 {
00059   DRIZZLE_VERSION_ID,
00060   "hello_world",
00061   "1.0",
00062   "Mark Atwood",
00063   "Hello, world!",
00064   PLUGIN_LICENSE_GPL,
00065   hello_world_plugin_init, /* Plugin Init */
00066   NULL,   /* depends */
00067   NULL    /* config options */
00068 }
00069 DRIZZLE_DECLARE_PLUGIN_END;