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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <drizzled/function/str/export_set.h>
#include <algorithm>
using namespace std;
namespace drizzled
{
String* Item_func_export_set::val_str(String* str)
{
assert(fixed == 1);
uint64_t the_set = (uint64_t) args[0]->val_int();
String yes_buf, *yes;
yes = args[1]->val_str(&yes_buf);
String no_buf, *no;
no = args[2]->val_str(&no_buf);
String *sep = NULL, sep_buf ;
uint32_t num_set_values = 64;
uint64_t mask = 0x1;
str->length(0);
str->set_charset(collation.collation);
/* Check if some argument is a NULL value */
if (args[0]->null_value || args[1]->null_value || args[2]->null_value)
{
null_value=1;
return 0;
}
/*
Arg count can only be 3, 4 or 5 here. This is guaranteed from the
grammar for EXPORT_SET()
*/
switch(arg_count) {
case 5:
num_set_values = (uint) args[4]->val_int();
if (num_set_values > 64)
num_set_values=64;
if (args[4]->null_value)
{
null_value=1;
return 0;
}
/* Fall through */
case 4:
if (!(sep = args[3]->val_str(&sep_buf))) // Only true if NULL
{
null_value=1;
return 0;
}
break;
case 3:
{
/* errors is not checked - assume "," can always be converted */
size_t errors;
sep_buf.copy(STRING_WITH_LEN(","), &my_charset_bin, collation.collation, &errors);
sep = &sep_buf;
}
break;
default:
assert(0); // cannot happen
}
null_value=0;
for (uint32_t i = 0; i < num_set_values; i++, mask = (mask << 1))
{
if (the_set & mask)
str->append(*yes);
else
str->append(*no);
if (i != num_set_values - 1)
str->append(*sep);
}
return str;
}
void Item_func_export_set::fix_length_and_dec()
{
uint32_t length= max(args[1]->max_length,args[2]->max_length);
uint32_t sep_length= (arg_count > 3 ? args[3]->max_length : 1);
max_length= length*64+sep_length*63;
if (agg_arg_charsets(collation, args+1, min(4U,arg_count)-1,
MY_COLL_ALLOW_CONV, 1))
return;
}
} /* namespace drizzled */
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