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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/function/cast/boolean.h"
#include "drizzled/error.h"
namespace drizzled {
namespace function {
namespace cast {
void Boolean::print(String *str, enum_query_type query_type)
{
str->append(STRING_WITH_LEN("cast("));
args[0]->print(str, query_type);
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;
if (res->length() == 1)
{
switch (res->c_ptr()[0])
{
case 'y': case 'Y':
case 't': case 'T': // PG compatibility
return evaluate(true, value);
case 'n': case 'N':
case 'f': case 'F': // PG compatibility
return evaluate(false, value);
default:
break;
}
}
else if ((res->length() == 5) and (strcasecmp(res->c_ptr(), "FALSE") == 0))
{
return evaluate(false, value);
}
if ((res->length() == 4) and (strcasecmp(res->c_ptr(), "TRUE") == 0))
{
return evaluate(true, value);
}
else if ((res->length() == 5) and (strcasecmp(res->c_ptr(), "FALSE") == 0))
{
return evaluate(false, value);
}
else if ((res->length() == 3) and (strcasecmp(res->c_ptr(), "YES") == 0))
{
return evaluate(true, value);
}
else if ((res->length() == 2) and (strcasecmp(res->c_ptr(), "NO") == 0))
{
return evaluate(false, value);
}
my_error(ER_INVALID_CAST_TO_BOOLEAN, MYF(0), res->c_ptr());
return evaluate(false, 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)
{
const CHARSET_INFO * const cs= &my_charset_bin;
uint32_t mlength= (5) * cs->mbmaxlen;
val_buffer->alloc(mlength);
char *buffer=(char*) 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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