Drizzled Public API Documentation

memc_get_by_key.cc
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
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00019  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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00031 
00032 #include <config.h>
00033 #include <drizzled/function/str/strfunc.h>
00034 
00035 #include "memcached_functions.h"
00036 #include "memc_get_by_key.h"
00037 
00038 #include <libmemcached/memcached.h>
00039 
00040 #include <string>
00041 
00042 using namespace std;
00043 using namespace drizzled;
00044 
00045 String *MemcachedGetByKey::val_str(String *str)
00046 {
00047   memcached_return rc;
00048   String *master_key;
00049   String *key;
00050   uint32_t flags;
00051   size_t val_len;
00052 
00053   if (arg_count != 2 ||
00054       ! (master_key= args[0]->val_str(str)) ||
00055       ! (key= args[1]->val_str(str)) ||
00056       ! memc)
00057   {
00058     return &failure_buff;
00059   }
00060 
00061   char *value= memcached_get_by_key(memc,
00062                                     master_key->c_ptr(),
00063                                     master_key->length(),
00064                                     key->c_ptr(), key->length(),
00065                                     &val_len, &flags, &rc);
00066   if (rc != MEMCACHED_SUCCESS)
00067   {
00068     null_value= true;
00069     return NULL;
00070   }
00071 
00072   buffer.realloc(val_len);
00073   buffer.length(val_len);
00074   memcpy(buffer.ptr(), value, val_len);
00075   free(value);
00076 
00077   return &buffer;
00078 }
00079