Drizzled Public API Documentation

memc_cas_by_key.h
00001 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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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
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00018  *
00019  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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00031 
00032 #pragma once
00033 
00034 #include <drizzled/function/str/strfunc.h>
00035 #include <drizzled/item/func.h>
00036 #include <string>
00037 
00038 /* implements memc_cas */
00039 class MemcachedCasByKey : public drizzled::Item_int_func
00040 {
00041   drizzled::String failure_buff;
00042   drizzled::String value;
00043 public:
00044   MemcachedCasByKey()
00045     :
00046       Item_int_func(),
00047       failure_buff("failure", &drizzled::my_charset_bin)
00048   {}
00049 
00050   const char *func_name() const
00051   {
00052     return "memc_cas_by_key";
00053   }
00054 
00055   int64_t val_int();
00056 
00057   void fix_length_and_dec()
00058   {
00059     max_length= 32;
00060   }
00061   bool check_argument_count(int n)
00062   {
00063     return ((n == 4 || n == 5));
00064   }
00065 };
00066