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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, Inc.
*
* 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/right.h>
namespace drizzled
{
String *Item_func_right::val_str(String *str)
{
assert(fixed == 1);
String *res= args[0]->val_str(str);
/* must be int64_t to avoid truncation */
int64_t length= args[1]->val_int();
if ((null_value=(args[0]->null_value || args[1]->null_value)))
return 0;
/* if "unsigned_flag" is set, we have a *huge* positive number. */
if ((length <= 0) && (!args[1]->unsigned_flag))
return &my_empty_string;
if (res->length() <= (uint64_t) length)
return res;
uint32_t start=res->numchars();
if (start <= (uint) length)
return res;
start=res->charpos(start - (uint) length);
tmp_value.set(*res,start,res->length()-start);
return &tmp_value;
}
void Item_func_right::fix_length_and_dec()
{
collation.set(args[0]->collation);
left_right_max_length();
}
} /* namespace drizzled */
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