compiler/stdc/strtold.c

   1 /*
   2     Copyright © 2015, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     C99 function strtold().
   6 */
   7
   8 #ifndef AROS_NOFPU
   9
  10 #include <ctype.h>
  11 #include <limits.h>
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16 #include <stdlib.h>
  17 #include <math.h>
  18
  19         long double strtold (
  20
  21 /*  SYNOPSIS */
  22         const char * str,
  23         char      ** endptr)
  24
  25 /*  FUNCTION
  26         Convert a string of digits into a long double.
  27
  28     INPUTS
  29         str - The string which should be converted. Leading
  30                 whitespace are ignored. The number may be prefixed
  31                 by a '+' or '-'. An 'e' or 'E' introduces the exponent.
  32                 Komma is only allowed before exponent.
  33         endptr - If this is non-NULL, then the address of the first
  34                 character after the number in the string is stored
  35                 here.
  36
  37     RESULT
  38         The value of the string. The first character after the number
  39         is returned in *endptr, if endptr is non-NULL. If no digits can
  40         be converted, *endptr contains str (if non-NULL) and 0 is
  41         returned.
  42
  43     NOTES
  44         We make the compiler do an internal conversion from a double
  45         to a long double. Because of this we lose a some precision, but for
  46         now it works.
  47
  48     EXAMPLE
  49
  50     BUGS
  51         NAN is not handled at the moment
  52
  53     SEE ALSO
  54         strtod()
  55
  56     INTERNALS
  57
  58 ******************************************************************************/
  59 {
  60     return (long double)strtod(str, endptr);
  61 } /* strtold */
  62
  63 #else
  64
  65 void strtold (const char * str,char ** endptr)
  66 {
  67     return;
  68 }
  69
  70 #endif /* AROS_NOFPU */