forked from Imagelibrary/rtems
662ad275f7
There are only the 3 names in our entire source that use non-ASCII characters. Our documentation can still use any type of character. We want to limit source to ASCII for safety reasons.
65 lines
1.1 KiB
C
65 lines
1.1 KiB
C
/**
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* @file
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*
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* @ingroup libmisc_conv_help Conversion Helpers
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*
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* @brief Convert String to Float (with validation)
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*/
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/*
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* COPYRIGHT (c) 2009.
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* On-Line Applications Research Corporation (OAR).
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*
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* Copyright (c) 2011 Ralf Corsepius, Ulm, Germany.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#include <stdlib.h>
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#include <math.h>
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#include <rtems/stringto.h>
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/*
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* Instantiate an error checking wrapper for strtof (float)
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*/
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rtems_status_code rtems_string_to_float (
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const char *s,
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float *n,
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char **endptr
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)
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{
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float result;
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char *end;
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if ( !n )
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return RTEMS_INVALID_ADDRESS;
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errno = 0;
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*n = 0;
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result = strtof( s, &end );
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if ( endptr )
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*endptr = end;
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if ( end == s )
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return RTEMS_NOT_DEFINED;
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if ( ( errno == ERANGE ) &&
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(( result == 0 ) || ( result == HUGE_VALF ) || ( result == -HUGE_VALF )))
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return RTEMS_INVALID_NUMBER;
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*n = result;
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return RTEMS_SUCCESSFUL;
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}
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