reactos/base/applications/calc/utl_ieee.c
Katayama Hirofumi MZ ede60035f4
[CALC] Adapt to <strsafe.h> (#5894)
Use safer string functions of  <strsafe.h>.
Use StringCbPrintf instead of _stprintf.
Use StringCbCopy insteaad of _tcscpy.
Use StringCbCat instead of _tcscat.
CORE-19306
2023-11-19 21:46:00 +09:00

127 lines
3.8 KiB
C

/*
* ReactOS Calc (Utility functions for IEEE-754 engine)
*
* Copyright 2007-2017, Carlo Bramini
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "calc.h"
void prepare_rpn_result_2(calc_number_t *rpn, TCHAR *buffer, int size, int base)
{
calc_number_t tmp;
int width;
switch (base) {
case IDC_RADIO_HEX:
StringCchPrintf(buffer, size, _T("%I64X"), rpn->i);
break;
case IDC_RADIO_DEC:
/*
* Modified from 17 to 16 for fixing this bug:
* 14+14+6.3+6.3= 40.5999999 instead of 40.6
* So, it's probably better to leave the least
* significant digit out of the display.
*/
#define MAX_LD_WIDTH 16
/* calculate the width of integer number */
width = (rpn->f==0) ? 1 : (int)log10(fabs(rpn->f))+1;
if (calc.sci_out == TRUE || width > MAX_LD_WIDTH || width < -MAX_LD_WIDTH)
StringCchPrintf(buffer, size, _T("%#.*e"), MAX_LD_WIDTH-1, rpn->f);
else {
TCHAR *ptr, *dst;
StringCchPrintfEx(buffer, size, &ptr, NULL, 0, _T("%#*.*f"), width, ((MAX_LD_WIDTH-width-1)>=0) ? MAX_LD_WIDTH-width-1 : 0, rpn->f);
/* format string ensures there is a '.': */
dst = _tcschr(buffer, _T('.'));
while (--ptr > dst)
if (*ptr != _T('0'))
break;
/* put the string terminator for removing the final '0' (if any) */
ptr[1] = _T('\0');
/* check if the number finishes with '.' */
if (ptr == dst)
/* remove the dot (it will be re-added later) */
ptr[0] = _T('\0');
}
#undef MAX_LD_WIDTH
break;
case IDC_RADIO_OCT:
StringCchPrintf(buffer, size, _T("%I64o"), rpn->i);
break;
case IDC_RADIO_BIN:
if (rpn->i == 0) {
buffer[0] = _T('0');
buffer[1] = _T('\0');
break;
}
tmp = *rpn;
buffer[0] = _T('\0');
while (tmp.u) {
memmove(buffer+1, buffer, (size-1)*sizeof(TCHAR));
if (tmp.u & 1)
buffer[0] = _T('1');
else
buffer[0] = _T('0');
tmp.u >>= 1;
}
break;
}
}
void convert_text2number_2(calc_number_t *a)
{
TCHAR *ptr;
switch (calc.base) {
case IDC_RADIO_HEX:
_stscanf(calc.buffer, _T("%I64X"), &(a->i));
break;
case IDC_RADIO_DEC:
_stscanf(calc.buffer, _T("%lf"), &(a->f));
break;
case IDC_RADIO_OCT:
_stscanf(calc.buffer, _T("%I64o"), &(a->i));
break;
case IDC_RADIO_BIN:
ptr = calc.buffer;
a->i = 0;
while (*ptr != _T('\0')) {
a->i <<= 1;
if (*ptr++ == _T('1'))
a->i |= 1;
}
break;
}
}
void convert_real_integer(unsigned int base)
{
switch (base) {
case IDC_RADIO_DEC:
calc.code.f = (double)calc.code.i;
break;
case IDC_RADIO_OCT:
case IDC_RADIO_BIN:
case IDC_RADIO_HEX:
if (calc.base == IDC_RADIO_DEC) {
calc.code.i = (__int64)calc.code.f;
apply_int_mask(&calc.code);
}
break;
}
}