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/* - mode: c++ c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 MySQL
*
* 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 <float.h>
#include <math.h>
#include <algorithm>
#include <drizzled/field/double.h>
#include <drizzled/error.h>
#include <drizzled/table.h>
#include <drizzled/session.h>
#include "drizzled/internal/m_string.h"
using namespace std;
namespace drizzled
{
/****************************************************************************
double precision floating point numbers
****************************************************************************/
int Field_double::store(const char *from,uint32_t len, const CHARSET_INFO * const cs)
{
int error;
char *end;
double nr= my_strntod(cs,(char*) from, len, &end, &error);
ASSERT_COLUMN_MARKED_FOR_WRITE;
if (error || (!len || (((uint32_t) (end-from) != len) && table->in_use->count_cuted_fields)))
{
set_warning(DRIZZLE_ERROR::WARN_LEVEL_WARN,
(error ? ER_WARN_DATA_OUT_OF_RANGE : ER_WARN_DATA_TRUNCATED), 1);
error= error ? 1 : 2;
}
Field_double::store(nr);
return error;
}
int Field_double::store(double nr)
{
int error= truncate(&nr, DBL_MAX);
ASSERT_COLUMN_MARKED_FOR_WRITE;
#ifdef WORDS_BIGENDIAN
if (table->s->db_low_byte_first)
{
float8store(ptr,nr);
}
else
#endif
doublestore(ptr,nr);
return error;
}
int Field_double::store(int64_t nr, bool unsigned_val)
{
return Field_double::store(unsigned_val ? uint64_t2double((uint64_t) nr) :
(double) nr);
}
double Field_double::val_real(void)
{
double j;
ASSERT_COLUMN_MARKED_FOR_READ;
#ifdef WORDS_BIGENDIAN
if (table->s->db_low_byte_first)
{
float8get(j,ptr);
}
else
#endif
doubleget(j,ptr);
return j;
}
int64_t Field_double::val_int(void)
{
double j;
int64_t res;
ASSERT_COLUMN_MARKED_FOR_READ;
#ifdef WORDS_BIGENDIAN
if (table->s->db_low_byte_first)
{
float8get(j,ptr);
}
else
#endif
doubleget(j,ptr);
/* Check whether we fit into int64_t range */
if (j <= (double) INT64_MIN)
{
res= (int64_t) INT64_MIN;
goto warn;
}
if (j >= (double) (uint64_t) INT64_MAX)
{
res= (int64_t) INT64_MAX;
goto warn;
}
return (int64_t) rint(j);
warn:
{
char buf[DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE];
String tmp(buf, sizeof(buf), &my_charset_utf8_general_ci), *str;
str= val_str(&tmp, &tmp);
push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
ER_TRUNCATED_WRONG_VALUE,
ER(ER_TRUNCATED_WRONG_VALUE), "INTEGER",
str->c_ptr());
}
return res;
}
String *Field_double::val_str(String *val_buffer,
String *)
{
double nr;
ASSERT_COLUMN_MARKED_FOR_READ;
#ifdef WORDS_BIGENDIAN
if (table->s->db_low_byte_first)
{
float8get(nr,ptr);
}
else
#endif
doubleget(nr,ptr);
uint32_t to_length= max(field_length, (uint32_t)DOUBLE_TO_STRING_CONVERSION_BUFFER_SIZE);
val_buffer->alloc(to_length);
char *to=(char*) val_buffer->ptr();
size_t len;
if (dec >= NOT_FIXED_DEC)
len= internal::my_gcvt(nr, internal::MY_GCVT_ARG_DOUBLE, to_length - 1, to, NULL);
else
len= internal::my_fcvt(nr, dec, to, NULL);
val_buffer->length((uint32_t) len);
return val_buffer;
}
int Field_double::cmp(const unsigned char *a_ptr, const unsigned char *b_ptr)
{
double a,b;
#ifdef WORDS_BIGENDIAN
if (table->s->db_low_byte_first)
{
float8get(a,a_ptr);
float8get(b,b_ptr);
}
else
#endif
{
doubleget(a, a_ptr);
doubleget(b, b_ptr);
}
return (a < b) ? -1 : (a > b) ? 1 : 0;
}
/* The following should work for IEEE */
void Field_double::sort_string(unsigned char *to,uint32_t )
{
double nr;
#ifdef WORDS_BIGENDIAN
if (table->s->db_low_byte_first)
{
float8get(nr,ptr);
}
else
#endif
doubleget(nr,ptr);
change_double_for_sort(nr, to);
}
void Field_double::sql_type(String &res) const
{
const CHARSET_INFO * const cs=res.charset();
if (dec == NOT_FIXED_DEC)
{
res.set_ascii(STRING_WITH_LEN("double"));
}
else
{
res.length(cs->cset->snprintf(cs,(char*) res.ptr(),res.alloced_length(),
"double(%d,%d)",(int) field_length,dec));
}
}
} /* namespace drizzled */
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