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/**
* @file
*
* @brief Convert String to Double (with validation)
* @ingroup libmisc_conv_help Conversion Helpers
*/
/*
* COPYRIGHT (c) 2009.
* On-Line Applications Research Corporation (OAR).
*
* Copyright (c) 2011 Ralf Corsépius, Ulm, Germany.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <stdlib.h>
#include <math.h>
#include <rtems/stringto.h>
/*
* Instantiate an error checking wrapper for strtod (double)
*/
rtems_status_code rtems_string_to_double (
const char *s,
double *n,
char **endptr
)
{
double result;
char *end;
if ( !n )
return RTEMS_INVALID_ADDRESS;
errno = 0;
*n = 0;
result = strtod( s, &end );
if ( endptr )
*endptr = end;
if ( end == s )
return RTEMS_NOT_DEFINED;
if ( ( errno == ERANGE ) &&
(( result == 0 ) || ( result == HUGE_VAL ) || ( result == -HUGE_VAL )))
return RTEMS_INVALID_NUMBER;
*n = result;
return RTEMS_SUCCESSFUL;
}
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