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/* Copyright (C) 2004 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mysql_priv.h"
#ifndef MYSQL_CLIENT
/*
report result of decimal operation
SYNOPSIS
decimal_operation_results()
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, MYSQL_ERROR::WARN_LEVEL_WARN,
WARN_DATA_TRUNCATED, ER(WARN_DATA_TRUNCATED),
"", (long)-1);
break;
case E_DEC_OVERFLOW:
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
ER_TRUNCATED_WRONG_VALUE,
ER(ER_TRUNCATED_WRONG_VALUE),
"DECIMAL", "");
break;
case E_DEC_DIV_ZERO:
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
ER_DIVISION_BY_ZERO, ER(ER_DIVISION_BY_ZERO));
break;
case E_DEC_BAD_NUM:
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_ERROR,
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;
}
/*
Converting decimal to string
SYNOPSIS
my_decimal2string()
return
E_DEC_OK
E_DEC_TRUNCATED
E_DEC_OVERFLOW
E_DEC_OOM
*/
int my_decimal2string(uint mask, const my_decimal *d,
uint fixed_prec, uint fixed_dec,
char filler, String *str)
{
int length= (fixed_prec ? (fixed_prec + 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);
return check_result(mask, result);
}
/*
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, char *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 can return only 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,
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)
{
/* Give warning if there is something other than end space */
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;
}
#ifndef DBUG_OFF
/* routines for debugging print */
#define DIG_PER_DEC1 9
#define ROUND_UP(X) (((X)+DIG_PER_DEC1-1)/DIG_PER_DEC1)
/* print decimal */
void
print_decimal(const my_decimal *dec)
{
int i, end;
char buff[512], *pos;
pos= buff;
pos+= my_sprintf(buff, (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+= my_sprintf(pos, (pos, "%09d, ", dec->buf[i]));
pos+= my_sprintf(pos, (pos, "%09d }\n", dec->buf[i]));
fputs(buff, DBUG_FILE);
}
/* print decimal with its binary representation */
void
print_decimal_buff(const my_decimal *dec, const byte* 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;
if (!val)
return "NULL";
(void)decimal2string((decimal_t*) val, buff, &length, 0,0,0);
return buff;
}
#endif /*DBUG_OFF*/
#endif /*MYSQL_CLIENT*/
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