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/* Copyright (C) 2006 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include <drizzled/common_includes.h>
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bool udf_init_crc32udf(UDF_INIT *initid, UDF_ARGS *args, char *message)
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/* initid->ptr keeps state for between udf_init_foo and udf_deinit_foo */
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if (args->arg_count != 1)
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strcpy(message,"CRC32() requires one arguments");
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if (args->arg_type[0] != STRING_RESULT)
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strcpy(message,"CRC32() requires a string");
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long long udf_doit_crc32(UDF_INIT *initid, UDF_ARGS *args, char *result,
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unsigned long *length, char *is_null, char *error)
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return (long long) crc32(0L, (uchar*)args->args[0], args->lengths[0]);
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void udf_deinit_crc32udf(UDF_INIT *initid)
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/* if we allocated initid->ptr, free it here */
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static int crc32udf_plugin_init(void *p)
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udf_func *udff= (udf_func *) p;
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static char crc32str[6];
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strcpy(crc32str,"crc32");
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udff->name.str= crc32str;
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udff->name.length= strlen("crc32");
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udff->type= UDFTYPE_FUNCTION;
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udff->returns= INT_RESULT;
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udff->func_init= udf_init_crc32udf;
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udff->func_deinit= udf_deinit_crc32udf;
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udff->func= (Udf_func_any) udf_doit_crc32;
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static int crc32udf_plugin_deinit(void *p)
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udf_func *udff = (udf_func *) p;
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mysql_declare_plugin(crc32)
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"UDF for computing CRC32",
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crc32udf_plugin_init, /* Plugin Init */
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crc32udf_plugin_deinit, /* Plugin Deinit */
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NULL, /* status variables */
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NULL, /* system variables */
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NULL /* config options */
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mysql_declare_plugin_end;
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <drizzled/plugin/function.h>
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#include <drizzled/item/func.h>
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#include <drizzled/algorithm/crc32.h>
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using namespace drizzled;
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class Crc32Function :public Item_int_func
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Crc32Function() :Item_int_func()
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const char *func_name() const
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void fix_length_and_dec()
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bool check_argument_count(int n)
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int64_t Crc32Function::val_int()
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assert(fixed == true);
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String *res=args[0]->val_str(&value);
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return static_cast<int64_t>(drizzled::algorithm::crc32(res->ptr(), res->length()));
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plugin::Create_function<Crc32Function> *crc32udf= NULL;
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static int initialize(plugin::Registry ®istry)
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crc32udf= new plugin::Create_function<Crc32Function>("crc32");
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registry.add(crc32udf);
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static int finalize(plugin::Registry ®istry)
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registry.remove(crc32udf);
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DRIZZLE_PLUGIN(initialize, finalize, NULL, NULL);