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/* - mode: c++ c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Brian Aker
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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/error.h>
#include <drizzled/function/cast/boolean.h>
#include <drizzled/lex_string.h>
#include <drizzled/type/boolean.h>
namespace drizzled {
namespace function {
namespace cast {
void Boolean::print(String *str)
{
str->append(STRING_WITH_LEN("cast("));
args[0]->print(str);
str->append(STRING_WITH_LEN(" as boolean)"));
}
drizzled::String *Boolean::val_str(drizzled::String *value)
{
switch (args[0]->result_type())
{
case STRING_RESULT:
{
drizzled::String _res, *res;
if (not (res= args[0]->val_str(&_res)))
{
null_value= true;
break;
}
null_value= false;
bool result;
if (not type::convert(result, *res))
{
my_error(ER_INVALID_CAST_TO_BOOLEAN, MYF(0), res->c_ptr());
}
return evaluate(result, value);
}
case REAL_RESULT:
case ROW_RESULT:
case DECIMAL_RESULT:
case INT_RESULT:
{
bool tmp= args[0]->val_bool();
null_value=args[0]->null_value;
return evaluate(tmp, value);
}
}
// We should never reach this
return evaluate(false, value);
}
String *Boolean::evaluate(const bool &result, String *val_buffer)
{
val_buffer->alloc(5 * my_charset_bin.mbmaxlen);
char *buffer= val_buffer->c_ptr();
if (result)
{
memcpy(buffer, "TRUE", 4);
val_buffer->length(4);
}
else
{
memcpy(buffer, "FALSE", 5);
val_buffer->length(5);
}
return val_buffer;
}
} // namespace cast
} // namespace function
} // namespace drizzled
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