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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: float.cxx,v $
* $Revision: 1.4 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_testshl2.hxx"
#include <stdio.h>
#include <double>
#include <math.h> // fabs()
// #include <sal/types.h>
#define sal_Int16 short
#define SAL_CALL
// LLA: from kernel.h
/*
* min()/max() macros that also do
* strict type-checking.. See the
* "unnecessary" pointer comparison.
*/
#define MIN(x,y) ({ \
const typeof(x) _x = (x); \
const typeof(y) _y = (y); \
(void) (&_x == &_y); \
_x < _y ? _x : _y; })
#define MAX(x,y) ({ \
const typeof(x) _x = (x); \
const typeof(y) _y = (y); \
(void) (&_x == &_y); \
_x > _y ? _x : _y; })
//------------------------------------------------------------------------
// testing the method toDouble()
//------------------------------------------------------------------------
template<class T>
sal_Int16 SAL_CALL test_rtl_OString_checkPrecisionSize()
{
sal_Int16 nSize = sizeof(T);
T nCalcValue = 1.0;
// (i + 1) is the current precision
sal_Int16 i = 0;
for (i=0;i<50;i++)
{
nCalcValue *= 10;
T nValue = nCalcValue + 0.1;
T dSub = nValue - nCalcValue;
// ----- 0.11 ---- 0.1 ---- 0.09 -----
if (0.11 > dSub && dSub < 0.09)
{
// due to the fact, that the value is break down we sub 1 from the precision value
// but to suppress this, we start at zero, precision is i+1 till here --i;
break;
}
}
sal_Int16 j= 0;
nCalcValue = 1.0;
for (j=0;j<50;j++)
{
nCalcValue /= 10;
T nValue = nCalcValue + 1.0;
T dSub = nValue - 1.0;
// ---- 0.02 ----- 0.01 ---- 0 --- -0.99 ---- -0.98 ----
T dSubAbsolut = fabs(dSub);
// ---- 0.02 ----- 0.01 ---- 0 (cut)
if ( dSub == 0)
break;
}
if (i != j)
{
// hmmm....
// imho i +- 1 == j is a good value
int n = i - j;
if (n < 0) n = -n;
if (n <= 1)
{
return MIN(i,j);
}
else
{
printf("warning: presision differs more than 1");
}
}
return i;
}
void SAL_CALL test_precision( )
{
sal_Int16 nPrecision;
nPrecision = test_rtl_OString_checkPrecisionSize<float>();
nPrecision = test_rtl_OString_checkPrecisionSize<double>();
nPrecision = test_rtl_OString_checkPrecisionSize<long double>();
nPrecision = test_rtl_OString_checkPrecisionSize<Double>();
}
// ----------------------------------- Main -----------------------------------
#if (defined UNX) || (defined OS2)
int main( int argc, char* argv[] )
#else
int main( int argc, char* argv[] )
#endif
{
test_precision();
return 0;
}
// The following sets variables for GNU EMACS
// Local Variables:
// tab-width:4
// End:
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