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/*
* COPYRIGHT (c) 2009.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <errno.h>
#include <stdlib.h>
#include <limits.h>
#include <stdbool.h>
#include <math.h>
/*
* This file is designed to be included multiple times to instantiate
* it and should NOT be protected against multiple inclusions.
*/
#if !defined(STRING_TO_FLOAT) && !defined(STRING_TO_INTEGER)
#error "Neither STRING_TO_FLOAT nor STRING_TO_INTEGER defined"
#endif
#if defined(STRING_TO_FLOAT) && defined(STRING_TO_INTEGER)
#error "Both STRING_TO_FLOAT nor STRING_TO_INTEGER defined"
#endif
#ifndef STRING_TO_TYPE
#error "STRING_TO_TYPE not defined"
#endif
#ifndef STRING_TO_NAME
#error "STRING_TO_NAME not defined"
#endif
#ifndef STRING_TO_METHOD
#error "STRING_TO_METHOD not defined"
#endif
#ifndef STRING_TO_MAX
#error "STRING_TO_MAX not defined"
#endif
#undef ZERO
#ifdef STRING_TO_FLOAT
#define ZERO 0.0
#elif defined(STRING_TO_INTEGER)
#define ZERO 0
#endif
bool STRING_TO_NAME (
const char *s,
STRING_TO_TYPE *n,
char **endptr
#if defined(STRING_TO_INTEGER)
,
int base
#endif
)
{
STRING_TO_TYPE result;
char *end;
if ( !n )
return false;
errno = 0;
*n = 0;
#ifdef STRING_TO_FLOAT
result = STRING_TO_METHOD( s, &end );
#elif defined(STRING_TO_INTEGER)
result = STRING_TO_METHOD( s, &end, base );
#endif
/* If the user wants the end pointer back, then return it. */
if ( endptr )
*endptr = end;
/* nothing was converted */
if ( end == s )
return false;
/* there was a conversion error */
if ( (result == ZERO) && errno )
return false;
#ifdef STRING_TO_MAX
/* there was an overflow */
if ( (result == STRING_TO_MAX) && (errno == ERANGE))
return false;
#endif
#ifdef STRING_TO_MIN
/* there was an underflow */
if ( (result == STRING_TO_MIN) && (errno == ERANGE))
return false;
#endif
*n = result;
return true;
}
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