Drizzled Public API Documentation

memc_append.h
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00001 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  * Copyright (C) 2009, Patrick "CaptTofu" Galbraith, Padraig O'Sullivan
00005  * All rights reserved.
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions are met:
00009  *
00010  *   * Redistributions of source code must retain the above copyright notice,
00011  *     this list of conditions and the following disclaimer.
00012  *   * Redistributions in binary form must reproduce the above copyright notice,
00013  *     this list of conditions and the following disclaimer in the documentation
00014  *     and/or other materials provided with the distribution.
00015  *   * Neither the name of Patrick Galbraith nor the names of its contributors
00016  *     may be used to endorse or promote products derived from this software
00017  *     without specific prior written permission.
00018  *
00019  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00020  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
00023  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00024  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00025  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00026  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00027  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00028  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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00030  *
00031  */
00032 
00033 #pragma once
00034 
00035 #include <drizzled/function/str/strfunc.h>
00036 #include <drizzled/item/func.h>
00037 
00042 class MemcachedAppend : public drizzled::Item_int_func
00043 {
00044   drizzled::String value;
00045   drizzled::String failure_buff;
00046 public:
00047   MemcachedAppend()
00048     :
00049       Item_int_func(),
00050       failure_buff("failure ...", &drizzled::my_charset_bin)
00051   {}
00052 
00053   const char *func_name() const
00054   {
00055     return "memc_append";
00056   }
00057 
00058   int64_t val_int();
00059 
00060   void fix_length_and_dec()
00061   {
00062     max_length= 32;
00063   }
00064 /*
00065  * This UDF takes 2 or 3 arguments
00066  */
00067   bool check_argument_count(int n)
00068   {
00069     return ((n == 2 || n == 3));
00070   }
00071 
00072 };
00073