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/* Copyright (C) 2005-2006 MySQL 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <drizzled/server_includes.h>
#include <time.h>
#include <drizzled/error.h>
/**
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_session, DRIZZLE_ERROR::WARN_LEVEL_WARN,
ER_WARN_DATA_TRUNCATED, ER(ER_WARN_DATA_TRUNCATED),
"", (long)-1);
break;
case E_DEC_OVERFLOW:
push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_ERROR,
ER_TRUNCATED_WRONG_VALUE,
ER(ER_TRUNCATED_WRONG_VALUE),
"DECIMAL", "");
break;
case E_DEC_DIV_ZERO:
push_warning_printf(current_session, DRIZZLE_ERROR::WARN_LEVEL_ERROR,
ER_DIVISION_BY_ZERO, ER(ER_DIVISION_BY_ZERO));
break;
case E_DEC_BAD_NUM:
push_warning_printf(current_session, DRIZZLE_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:
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(uint32_t mask, const my_decimal *d,
uint32_t fixed_prec, uint32_t 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. 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)
: 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(uint32_t mask, const my_decimal *d, unsigned 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(uint32_t mask, const char *from, uint32_t 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)
{
uint32_t dummy_errors;
tmp.copy(from, length, charset, &my_charset_utf8_general_ci, &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_utf8_general_ci, *end))
{
err= E_DEC_TRUNCATED;
break;
}
}
}
check_result_and_overflow(mask, err, decimal_value);
return err;
}
my_decimal *date2my_decimal(DRIZZLE_TIME *ltime, my_decimal *dec)
{
int64_t date;
date = (ltime->year*100L + ltime->month)*100L + ltime->day;
if (ltime->time_type > DRIZZLE_TIMESTAMP_DATE)
date= ((date*100L + ltime->hour)*100L+ ltime->minute)*100L + ltime->second;
if (int2my_decimal(E_DEC_FATAL_ERROR, date, false, dec))
return dec;
if (ltime->second_part)
{
dec->buf[(dec->intg-1) / 9 + 1]= ltime->second_part * 1000;
dec->frac= 6;
}
return dec;
}
void my_decimal_trim(uint32_t *precision, uint32_t *scale)
{
if (!(*precision) && !(*scale))
{
*precision= 10;
*scale= 0;
return;
}
}
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