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/******************************************************************************
*
* Derived from GDAL port/cpl_strtod.cpp
* Purpose: Functions to convert ASCII string to floating point number.
* Author: Andrey Kiselev, dron@ak4719.spb.edu.
*
******************************************************************************
* Copyright (c) 2006, Andrey Kiselev
* Copyright (c) 2008-2012, Even Rouault <even dot rouault at mines-paris dot org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include <errno.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include "projects.h"
/* Windows nmake build doesn't have a proj_config.h, but HAVE_LOCALECONV */
/* is defined in the compilation line */
#ifndef HAVE_LOCALECONV
#include "proj_config.h"
#endif
#define PJ_STRTOD_WORK_BUFFER_SIZE 64
/************************************************************************/
/* pj_atof() */
/************************************************************************/
/**
* Converts ASCII string to floating point number.
*
* This function converts the initial portion of the string pointed to
* by nptr to double floating point representation. The behaviour is the
* same as
*
* pj_strtod(nptr, (char **)NULL);
*
* This function does the same as standard atof(3), but does not take
* locale in account. That means, the decimal delimiter is always '.'
* (decimal point).
*
* @param nptr Pointer to string to convert.
*
* @return Converted value.
*/
double pj_atof( const char* nptr )
{
return pj_strtod(nptr, nullptr);
}
/************************************************************************/
/* replace_point_by_locale_point() */
/************************************************************************/
static char* replace_point_by_locale_point(const char* pszNumber, char point,
char* pszWorkBuffer)
{
#if !defined(HAVE_LOCALECONV)
#if defined(_MSC_VER) /* Visual C++ */
#pragma message("localeconv not available")
#else
#warning "localeconv not available"
#endif
static char byPoint = 0;
if (byPoint == 0)
{
char szBuf[16];
sprintf(szBuf, "%.1f", 1.0);
byPoint = szBuf[1];
}
if (point != byPoint)
{
const char* pszPoint = strchr(pszNumber, point);
if (pszPoint)
{
char* pszNew;
if( strlen(pszNumber) < PJ_STRTOD_WORK_BUFFER_SIZE )
{
strcpy(pszWorkBuffer, pszNumber);
pszNew = pszWorkBuffer;
}
else {
pszNew = pj_strdup(pszNumber);
if (!pszNew)
return NULL;
}
pszNew[pszPoint - pszNumber] = byPoint;
return pszNew;
}
}
#else
struct lconv *poLconv = localeconv();
if ( poLconv
&& poLconv->decimal_point
&& poLconv->decimal_point[0] != '\0' )
{
char byPoint = poLconv->decimal_point[0];
if (point != byPoint)
{
const char* pszLocalePoint = strchr(pszNumber, byPoint);
const char* pszPoint = strchr(pszNumber, point);
if (pszPoint || pszLocalePoint)
{
char* pszNew;
if( strlen(pszNumber) < PJ_STRTOD_WORK_BUFFER_SIZE )
{
strcpy(pszWorkBuffer, pszNumber);
pszNew = pszWorkBuffer;
}
else {
pszNew = pj_strdup(pszNumber);
if (!pszNew)
return nullptr;
}
if( pszLocalePoint )
pszNew[pszLocalePoint - pszNumber] = ' ';
if( pszPoint )
pszNew[pszPoint - pszNumber] = byPoint;
return pszNew;
}
}
}
#endif
return (char*) pszNumber;
}
/************************************************************************/
/* pj_strtod() */
/************************************************************************/
/**
* Converts ASCII string to floating point number.
*
* This function converts the initial portion of the string pointed to
* by nptr to double floating point representation. This function does the
* same as standard strtod(3), but does not take locale in account and use
* decimal point.
*
* @param nptr Pointer to string to convert.
* @param endptr If is not NULL, a pointer to the character after the last
* character used in the conversion is stored in the location referenced
* by endptr.
*
* @return Converted value.
*/
double pj_strtod( const char *nptr, char **endptr )
{
/* -------------------------------------------------------------------- */
/* We are implementing a simple method here: copy the input string */
/* into the temporary buffer, replace the specified decimal delimiter */
/* with the one, taken from locale settings and use standard strtod() */
/* on that buffer. */
/* -------------------------------------------------------------------- */
double dfValue;
int nError;
char szWorkBuffer[PJ_STRTOD_WORK_BUFFER_SIZE];
char* pszNumber = replace_point_by_locale_point(nptr, '.', szWorkBuffer);
dfValue = strtod( pszNumber, endptr );
nError = errno;
if ( endptr )
*endptr = (char *)nptr + (*endptr - pszNumber);
if (pszNumber != (char*) nptr && pszNumber != szWorkBuffer )
free( pszNumber );
errno = nError;
return dfValue;
}
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