/**
* Converts ASCII string to floating point number using specified delimiter.
*
* This function converts the initial portion of the string pointed to
* by nptr to single floating point representation. This function does the
* same as standard strtof(3), but does not take locale in account. Instead of
* locale defined decimal delimiter you can specify your own one. Also see
* notes for CPLAtof() function.
*
* @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.
* @param point Decimal delimiter.
*
* @return Converted value, if any.
*/
float CPLStrtofDelim(const char *nptr, char **endptr, char point)
{
#if defined(HAVE_STRTOF)
/* -------------------------------------------------------------------- */
/* 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 strtof() */
/* on that buffer. */
/* -------------------------------------------------------------------- */
double dfValue;
int nError;
char* pszNumber = CPLReplacePointByLocalePoint(nptr, point);
dfValue = strtof( pszNumber, endptr );
nError = errno;
if ( endptr )
*endptr = (char *)nptr + (*endptr - pszNumber);
if (pszNumber != (char*) nptr)
CPLFree( pszNumber );
errno = nError;
return dfValue;
#else
return (float)CPLStrtodDelim(nptr, endptr, point);
#endif /* HAVE_STRTOF */
}
/**
* Converts ASCII string to floating point number using specified delimiter.
*
* 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. Instead of
* locale defined decimal delimiter you can specify your own one. Also see
* notes for CPLAtof() function.
*
* @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.
* @param point Decimal delimiter.
*
* @return Converted value, if any.
*/
double CPLStrtodDelim(const char *nptr, char **endptr, char point)
{
while( *nptr == ' ' )
nptr ++;
if (nptr[0] == '-')
{
if (strcmp(nptr, "-1.#QNAN") == 0 ||
strcmp(nptr, "-1.#IND") == 0)
return NAN;
if (strcmp(nptr,"-inf") == 0 ||
strcmp(nptr,"-1.#INF") == 0)
return -INFINITY;
}
else if (nptr[0] == '1')
{
if (strcmp(nptr, "1.#QNAN") == 0)
return NAN;
if (strcmp (nptr,"1.#INF") == 0)
return INFINITY;
}
else if (nptr[0] == 'i' && strcmp(nptr,"inf") == 0)
return INFINITY;
else if (nptr[0] == 'n' && strcmp(nptr,"nan") == 0)
return NAN;
/* -------------------------------------------------------------------- */
/* 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* pszNumber = CPLReplacePointByLocalePoint(nptr, point);
dfValue = strtod( pszNumber, endptr );
nError = errno;
if ( endptr )
*endptr = (char *)nptr + (*endptr - pszNumber);
if (pszNumber != (char*) nptr)
CPLFree( pszNumber );
errno = nError;
return dfValue;
}
/**
* Converts ASCII string to floating point number using specified delimiter.
*
* 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. Instead of
* locale defined decimal delimiter you can specify your own one. Also see
* notes for CPLAtof() function.
*
* @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.
* @param point Decimal delimiter.
*
* @return Converted value, if any.
*/
double CPLStrtodDelim(const char *nptr, char **endptr, char point)
{
while( *nptr == ' ' )
nptr ++;
if (nptr[0] == '-')
{
if (strcmp(nptr, "-1.#QNAN") == 0 ||
strcmp(nptr, "-1.#IND") == 0)
{
if( endptr ) *endptr = (char*)nptr + strlen(nptr);
// While it is possible on some platforms to flip the sign
// of NAN to negative, this function will always return a positive
// quiet (non-signalling) NaN.
return std::numeric_limits<double>::quiet_NaN();
}
if (strcmp(nptr,"-inf") == 0 ||
STARTS_WITH_CI(nptr, "-1.#INF"))
{
if( endptr ) *endptr = (char*)nptr + strlen(nptr);
return -std::numeric_limits<double>::infinity();
}
}
else if (nptr[0] == '1')
{
if (strcmp(nptr, "1.#QNAN") == 0)
{
if( endptr ) *endptr = (char*)nptr + strlen(nptr);
return std::numeric_limits<double>::quiet_NaN();
}
if( STARTS_WITH_CI(nptr, "1.#INF") )
{
if( endptr ) *endptr = (char*)nptr + strlen(nptr);
return std::numeric_limits<double>::infinity();
}
}
else if (nptr[0] == 'i' && strcmp(nptr,"inf") == 0)
{
if( endptr ) *endptr = (char*)nptr + strlen(nptr);
return std::numeric_limits<double>::infinity();
}
else if (nptr[0] == 'n' && strcmp(nptr,"nan") == 0)
{
if( endptr ) *endptr = (char*)nptr + strlen(nptr);
return std::numeric_limits<double>::quiet_NaN();
}
/* -------------------------------------------------------------------- */
/* 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. */
/* -------------------------------------------------------------------- */
char* pszNumber = CPLReplacePointByLocalePoint(nptr, point);
const double dfValue = strtod( pszNumber, endptr );
const int nError = errno;
if ( endptr )
*endptr = (char *)nptr + (*endptr - pszNumber);
if (pszNumber != (char*) nptr)
CPLFree( pszNumber );
errno = nError;
return dfValue;
}
