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/*
* Copyright (C) 2010-2011 - DIGITEO - Allan CORNET
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
*
*/
/* ========================================================================== */
#if defined(__linux__)
#define _GNU_SOURCE /* avoid dependency on GLIBC_2.7 */
#endif
/* ========================================================================== */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "stringToDouble.h"
#include "core_math.h"
#include "MALLOC.h"
#ifdef _MSC_VER
#include "strdup_windows.h"
#endif
#ifndef _MSC_VER
#ifndef stricmp
#define stricmp strcasecmp
#endif
#else
#define stricmp _stricmp
#endif
/* ========================================================================== */
#define DEFAULT_DOUBLE_MAX_DIGIT_FORMAT "%lg"
/* ========================================================================== */
static double returnINF(BOOL bPositive);
static double returnNAN(void);
/* ========================================================================== */
static char* replace_D_By_E(const char* _pst)
{
//find and replace d and D by E for compatibility with strtod Linux/Mac
char* pstReturn = strdup(_pst);
char* pstFind = pstReturn;
do
{
pstFind = strchr(pstFind, 'D');
if (pstFind)
{
pstFind[0] = 'E';
}
}
while (pstFind);
pstFind = pstReturn;
do
{
pstFind = strchr(pstFind, 'd');
if (pstFind)
{
pstFind[0] = 'e';
}
}
while (pstFind);
return pstReturn;
}
double stringToDouble(const char *pSTR, BOOL bConvertByNAN, stringToDoubleError *ierr)
{
double dValue = 0.0;
*ierr = STRINGTODOUBLE_ERROR;
if (pSTR)
{
if ((stricmp(pSTR, NanString) == 0) || (stricmp(pSTR, NegNanString) == 0) ||
(stricmp(pSTR, PosNanString) == 0) || (stricmp(pSTR, ScilabPosNanString) == 0) ||
(stricmp(pSTR, ScilabNanString) == 0) || (stricmp(pSTR, ScilabNegNanString) == 0))
{
dValue = returnNAN();
}
else if ((stricmp(pSTR, InfString) == 0) || (stricmp(pSTR, PosInfString) == 0) ||
(stricmp(pSTR, ScilabInfString) == 0) || (stricmp(pSTR, ScilabPosInfString) == 0))
{
dValue = returnINF(TRUE);
}
else if ((stricmp(pSTR, NegInfString) == 0) || (stricmp(pSTR, ScilabNegInfString) == 0))
{
dValue = returnINF(FALSE);
}
else if ((stricmp(pSTR, ScilabPiString) == 0) || (stricmp(pSTR, ScilabPosPiString) == 0))
{
dValue = M_PI;
}
else if (stricmp(pSTR, ScilabNegPiString) == 0)
{
dValue = -M_PI;
}
else if ((stricmp(pSTR, ScilabEString) == 0) || (stricmp(pSTR, ScilabPosEString) == 0))
{
dValue = exp(1);
}
else if (stricmp(pSTR, ScilabNegEString) == 0)
{
dValue = -exp(1);
}
else if ((stricmp(pSTR, ScilabEpsString) == 0) || (stricmp(pSTR, ScilabPosEpsString) == 0))
{
dValue = EPSILON;
}
else if (stricmp(pSTR, ScilabNegEpsString) == 0)
{
dValue = -EPSILON;
}
else
{
char* pstReplaced = replace_D_By_E(pSTR);
char *pEnd = NULL;
double v = strtod(pstReplaced, &pEnd);
if ((v == 0) && (pEnd == pstReplaced))
{
if (bConvertByNAN)
{
dValue = returnNAN();
}
else
{
*ierr = STRINGTODOUBLE_NOT_A_NUMBER;
FREE(pstReplaced);
return (dValue = 0.0);
}
}
else
{
if (strcmp(pEnd, "") == 0)
{
dValue = v;
}
else
{
if (bConvertByNAN)
{
dValue = returnNAN();
}
else
{
*ierr = STRINGTODOUBLE_NOT_A_NUMBER;
FREE(pstReplaced);
return (dValue = 0.0);
}
}
}
FREE(pstReplaced);
}
*ierr = STRINGTODOUBLE_NO_ERROR;
}
else
{
*ierr = STRINGTODOUBLE_MEMORY_ALLOCATION;
}
return dValue;
}
// =============================================================================
static double returnINF(BOOL bPositive)
{
double dbl1 = 1.0;
double dbl0 = dbl1 - dbl1;
int iSign = bPositive == 1 ? 1 : -1;
return iSign * dbl1 / dbl0;
}
// =============================================================================
static double returnNAN(void)
{
static int first = 1;
static double nan = 1.0;
if ( first )
{
nan = (nan - (double) first) / (nan - (double) first);
first = 0;
}
return (nan);
}
// =============================================================================
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