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 <my_global.h>
#include "sql_priv.h"
#include <time.h>
#ifndef MYSQL_CLIENT
#include "sql_class.h"
#endif
#ifndef MYSQL_CLIENT
report result of decimal operation.
@param result decimal library return code (E_DEC_* see include/decimal.h)
@todo
Fix error messages
@return
result
*/
int decimal_operation_results(int result)
{
switch (result) {
case E_DEC_OK:
break;
case E_DEC_TRUNCATED:
push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN,
WARN_DATA_TRUNCATED, ER(WARN_DATA_TRUNCATED),
"", (long)-1);
break;
case E_DEC_OVERFLOW:
push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN,
ER_TRUNCATED_WRONG_VALUE,
ER(ER_TRUNCATED_WRONG_VALUE),
"DECIMAL", "");
break;
case E_DEC_DIV_ZERO:
push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN,
ER_DIVISION_BY_ZERO, ER(ER_DIVISION_BY_ZERO));
break;
case E_DEC_BAD_NUM:
push_warning_printf(current_thd, Sql_condition::WARN_LEVEL_WARN,
ER_TRUNCATED_WRONG_VALUE_FOR_FIELD,
ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD),
"decimal", "", "", (long)-1);
break;
case E_DEC_OOM:
my_error(ER_OUT_OF_RESOURCES, MYF(0));
break;
default:
DBUG_ASSERT(0);
}
return result;
}
@brief Converting decimal to string
@details Convert given my_decimal to String; allocate buffer as needed.
@param[in] mask what problems to warn on (mask of E_DEC_* values)
@param[in] d the decimal to print
@param[in] fixed_prec overall number of digits if ZEROFILL, 0 otherwise
@param[in] fixed_dec number of decimal places (if fixed_prec != 0)
@param[in] filler what char to pad with (ZEROFILL et al.)
@param[out] *str where to store the resulting string
@return error coce
@retval E_DEC_OK
@retval E_DEC_TRUNCATED
@retval E_DEC_OVERFLOW
@retval E_DEC_OOM
*/
int my_decimal2string(uint mask, const my_decimal *d,
uint fixed_prec, uint fixed_dec,
char filler, String *str)
{
Calculate the size of the string: For DECIMAL(a,b), fixed_prec==a
holds true iff the type is also ZEROFILL, which in turn implies
UNSIGNED. Hence the buffer for a ZEROFILLed value is the length
the user requested, plus one for a possible decimal point, plus
one if the user only wanted decimal places, but we force a leading
zero on them, plus one for the '\0' terminator. Because the type
is implicitly UNSIGNED, we do not need to reserve a character for
the sign. For all other cases, fixed_prec will be 0, and
my_decimal_string_length() will be called instead to calculate the
required size of the buffer.
*/
int length= (fixed_prec
? (fixed_prec + ((fixed_prec == fixed_dec) ? 1 : 0) + 1 + 1)
: my_decimal_string_length(d));
int result;
if (str->alloc(length))
return check_result(mask, E_DEC_OOM);
result= decimal2string((decimal_t*) d, (char*) str->ptr(),
&length, (int)fixed_prec, fixed_dec,
filler);
str->length(length);
str->set_charset(&my_charset_numeric);
return check_result(mask, result);
}
@brief Converting decimal to string with character set conversion
@details Convert given my_decimal to String; allocate buffer as needed.
@param[in] mask what problems to warn on (mask of E_DEC_* values)
@param[in] val the decimal to print
@param[in] fixed_prec overall number of digits if ZEROFILL, 0 otherwise
@param[in] fixed_dec number of decimal places (if fixed_prec != 0)
@param[in] filler what char to pad with (ZEROFILL et al.)
@param[out] *str where to store the resulting string
@param[in] cs character set
@return error coce
@retval E_DEC_OK
@retval E_DEC_TRUNCATED
@retval E_DEC_OVERFLOW
@retval E_DEC_OOM
Would be great to make it a method of the String class,
but this would need to include
my_decimal.h from sql_string.h and sql_string.cc, which is not desirable.
*/
bool
str_set_decimal(uint mask, const my_decimal *val,
uint fixed_prec, uint fixed_dec, char filler,
String *str, const CHARSET_INFO *cs)
{
if (!(cs->state & MY_CS_NONASCII))
{
my_decimal2string(mask, val, fixed_prec, fixed_dec, filler, str);
str->set_charset(cs);
return FALSE;
}
else
{
For ASCII-incompatible character sets (like UCS2) we
call my_decimal2string() on a temporary buffer first,
and then convert the result to the target character
with help of str->copy().
*/
uint errors;
char buf[DECIMAL_MAX_STR_LENGTH];
String tmp(buf, sizeof(buf), &my_charset_latin1);
my_decimal2string(mask, val, fixed_prec, fixed_dec, filler, &tmp);
return str->copy(tmp.ptr(), tmp.length(), &my_charset_latin1, cs, &errors);
}
}
Convert from decimal to binary representation
SYNOPSIS
my_decimal2binary()
mask error processing mask
d number for conversion
bin pointer to buffer where to write result
prec overall number of decimal digits
scale number of decimal digits after decimal point
NOTE
Before conversion we round number if it need but produce truncation
error in this case
RETURN
E_DEC_OK
E_DEC_TRUNCATED
E_DEC_OVERFLOW
*/
int my_decimal2binary(uint mask, const my_decimal *d, uchar *bin, int prec,
int scale)
{
int err1= E_DEC_OK, err2;
my_decimal rounded;
my_decimal2decimal(d, &rounded);
rounded.frac= decimal_actual_fraction(&rounded);
if (scale < rounded.frac)
{
err1= E_DEC_TRUNCATED;
decimal_round(&rounded, &rounded, scale, HALF_UP);
}
err2= decimal2bin(&rounded, bin, prec, scale);
if (!err2)
err2= err1;
return check_result(mask, err2);
}
Convert string for decimal when string can be in some multibyte charset
SYNOPSIS
str2my_decimal()
mask error processing mask
from string to process
length length of given string
charset charset of given string
decimal_value buffer for result storing
RESULT
E_DEC_OK
E_DEC_TRUNCATED
E_DEC_OVERFLOW
E_DEC_BAD_NUM
E_DEC_OOM
*/
int str2my_decimal(uint mask, const char *from, uint length,
const CHARSET_INFO *charset, my_decimal *decimal_value)
{
char *end, *from_end;
int err;
char buff[STRING_BUFFER_USUAL_SIZE];
String tmp(buff, sizeof(buff), &my_charset_bin);
if (charset->mbminlen > 1)
{
uint dummy_errors;
tmp.copy(from, length, charset, &my_charset_latin1, &dummy_errors);
from= tmp.ptr();
length= tmp.length();
charset= &my_charset_bin;
}
from_end= end= (char*) from+length;
err= string2decimal((char *)from, (decimal_t*) decimal_value, &end);
if (end != from_end && !err)
{
for ( ; end < from_end; end++)
{
if (!my_isspace(&my_charset_latin1, *end))
{
err= E_DEC_TRUNCATED;
break;
}
}
}
check_result_and_overflow(mask, err, decimal_value);
return err;
}
Convert lldiv_t value to my_decimal value.
Integer part of the result is set to lld->quot.
Fractional part of the result is set to lld->rem divided to 1000000000.
@param lld The lldiv_t variable to convert from.
@param neg Sign flag (negative, 0 positive).
@param OUT dec Decimal numbert to convert to.
*/
static my_decimal *lldiv_t2my_decimal(const lldiv_t *lld, bool neg,
my_decimal *dec)
{
if (int2my_decimal(E_DEC_FATAL_ERROR, lld->quot, FALSE, dec))
return dec;
if (neg)
decimal_neg((decimal_t *) dec);
if (lld->rem)
{
dec->buf[(dec->intg-1) / 9 + 1]= lld->rem;
dec->frac= 6;
}
return dec;
}
Convert datetime value to my_decimal in format YYYYMMDDhhmmss.ffffff
@param ltime Date value to convert from.
@param dec Decimal value to convert to.
*/
my_decimal *date2my_decimal(const MYSQL_TIME *ltime, my_decimal *dec)
{
lldiv_t lld;
lld.quot= ltime->time_type > MYSQL_TIMESTAMP_DATE ?
TIME_to_ulonglong_datetime(ltime) :
TIME_to_ulonglong_date(ltime);
lld.rem= (longlong) ltime->second_part * 1000;
return lldiv_t2my_decimal(&lld, ltime->neg, dec);
}
Convert time value to my_decimal in format hhmmss.ffffff
@param ltime Date value to convert from.
@param dec Decimal value to convert to.
*/
my_decimal *time2my_decimal(const MYSQL_TIME *ltime, my_decimal *dec)
{
lldiv_t lld;
lld.quot= TIME_to_ulonglong_time(ltime);
lld.rem= (longlong) ltime->second_part * 1000;
return lldiv_t2my_decimal(&lld, ltime->neg, dec);
}
Convert timeval value to my_decimal.
*/
my_decimal *timeval2my_decimal(const struct timeval *tm, my_decimal *dec)
{
lldiv_t lld;
lld.quot= tm->tv_sec;
lld.rem= (longlong) tm->tv_usec * 1000;
return lldiv_t2my_decimal(&lld, 0, dec);
}
void my_decimal_trim(ulong *precision, uint *scale)
{
if (!(*precision) && !(*scale))
{
*precision= 10;
*scale= 0;
return;
}
}
#ifndef DBUG_OFF
#define DIG_PER_DEC1 9
#define ROUND_UP(X) (((X)+DIG_PER_DEC1-1)/DIG_PER_DEC1)
void
print_decimal(const my_decimal *dec)
{
int i, end;
char buff[512], *pos;
pos= buff;
pos+= sprintf(buff, "Decimal: sign: %d intg: %d frac: %d { ",
dec->sign(), dec->intg, dec->frac);
end= ROUND_UP(dec->frac)+ROUND_UP(dec->intg)-1;
for (i=0; i < end; i++)
pos+= sprintf(pos, "%09d, ", dec->buf[i]);
pos+= sprintf(pos, "%09d }\n", dec->buf[i]);
fputs(buff, DBUG_FILE);
}
void
print_decimal_buff(const my_decimal *dec, const uchar* ptr, int length)
{
print_decimal(dec);
fprintf(DBUG_FILE, "Record: ");
for (int i= 0; i < length; i++)
{
fprintf(DBUG_FILE, "%02X ", (uint)((uchar *)ptr)[i]);
}
fprintf(DBUG_FILE, "\n");
}
const char *dbug_decimal_as_string(char *buff, const my_decimal *val)
{
int length= DECIMAL_MAX_STR_LENGTH + 1;
if (!val)
return "NULL";
(void)decimal2string((decimal_t*) val, buff, &length, 0,0,0);
return buff;
}
#endif
#endif