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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/session.h>
#include <drizzled/internal/m_string.h>
#include <drizzled/user_var_entry.h>
#include <drizzled/type/decimal.h>
#include <drizzled/charset.h>
namespace drizzled {
/** Get the value of a variable as a double. */
double user_var_entry::val_real(bool *null_value)
{
if ((*null_value= (value == 0)))
return 0.0;
switch (type) {
case REAL_RESULT:
return *(double*) value;
case INT_RESULT:
return (double) *(int64_t*) value;
case DECIMAL_RESULT:
{
double result;
class_decimal2double(E_DEC_FATAL_ERROR, (type::Decimal *)value, &result);
return result;
}
case STRING_RESULT:
return internal::my_atof(value); // This is null terminated
case ROW_RESULT:
assert(1); // Impossible
break;
}
return 0.0; // Impossible
}
/** Get the value of a variable as an integer. */
int64_t user_var_entry::val_int(bool *null_value) const
{
if ((*null_value= (value == 0)))
return 0L;
switch (type) {
case REAL_RESULT:
return (int64_t) *(double*) value;
case INT_RESULT:
return *(int64_t*) value;
case DECIMAL_RESULT:
{
int64_t result;
((type::Decimal *)(value))->val_int32(E_DEC_FATAL_ERROR, 0, &result);
return result;
}
case STRING_RESULT:
{
int error;
return internal::my_strtoll10(value, (char**) 0, &error);// String is null terminated
}
case ROW_RESULT:
assert(1); // Impossible
break;
}
return 0L; // Impossible
}
/** Get the value of a variable as a string. */
String *user_var_entry::val_str(bool *null_value, String *str,
uint32_t decimals)
{
if ((*null_value= (value == 0)))
return (String*) 0;
switch (type) {
case REAL_RESULT:
str->set_real(*(double*) value, decimals, &my_charset_bin);
break;
case INT_RESULT:
if (!unsigned_flag)
str->set(*(int64_t*) value, &my_charset_bin);
else
str->set(*(uint64_t*) value, &my_charset_bin);
break;
case DECIMAL_RESULT:
class_decimal2string((type::Decimal *)value, 0, str);
break;
case STRING_RESULT:
str->copy(value, length, collation.collation);
// break missing?
case ROW_RESULT:
assert(1); // Impossible
break;
}
return(str);
}
/** Get the value of a variable as a decimal. */
type::Decimal *user_var_entry::val_decimal(bool *null_value, type::Decimal *val)
{
if ((*null_value= (value == 0)))
return 0;
switch (type) {
case REAL_RESULT:
double2_class_decimal(E_DEC_FATAL_ERROR, *(double*) value, val);
break;
case INT_RESULT:
int2_class_decimal(E_DEC_FATAL_ERROR, *(int64_t*) value, 0, val);
break;
case DECIMAL_RESULT:
val= (type::Decimal *)value;
break;
case STRING_RESULT:
val->store(E_DEC_FATAL_ERROR, value, length, collation.collation);
break;
case ROW_RESULT:
assert(1); // Impossible
break;
}
return(val);
}
/**
Set value to user variable.
@param entry pointer to structure representing variable
@param set_null should we set NULL value ?
@param ptr pointer to buffer with new value
@param length length of new value
@param type type of new value
@param cs charset info for new value
@param dv derivation for new value
@param unsigned_arg indiates if a value of type INT_RESULT is unsigned
@note Sets error and fatal error if allocation fails.
@retval
false success
@retval
true failure
*/
void user_var_entry::update_hash(bool set_null, void *ptr, uint32_t arg_length,
Item_result arg_type, const charset_info_st * const cs, Derivation dv,
bool unsigned_arg)
{
if (set_null)
{
if (value)
{
assert(length && size);
free(value);
value= NULL;
length= 0;
size= 0;
}
}
else
{
size_t needed_size= arg_length + ((arg_type == STRING_RESULT) ? 1 : 0);
if (needed_size > size)
{
value= (char *)realloc(value, needed_size);
size= needed_size;
}
if (arg_type == STRING_RESULT)
value[arg_length]= 0; // Store end \0
memcpy(value, ptr, arg_length);
if (arg_type == DECIMAL_RESULT)
((type::Decimal*)value)->fix_buffer_pointer();
length= arg_length;
collation.set(cs, dv);
unsigned_flag= unsigned_arg;
}
type= arg_type;
}
} /* namespace drizzled */
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