StdLib/LibC/gdtoa/strtold_subr.c

   1 /* $NetBSD: strtold_subr.c,v 1.1 2006/03/15 17:35:18 kleink Exp $ */
   2
   3 /*
   4  * Written by Klaus Klein <kleink@NetBSD.org>, November 16, 2005.
   5  * Public domain.
   6  */
   7
   8 /*
   9  * NOTICE: This is not a standalone file.  To use it, #include it in
  10  * the format-specific strtold_*.c, like so:
  11  *
  12  *  #define GDTOA_LD_FMT  <gdtoa extended-precision format code>
  13  *  #include "strtold_subr.c"
  14  */
  15 #include  <LibConfig.h>
  16 #include  <sys/EfiCdefs.h>
  17
  18 #include  "namespace.h"
  19 #include  <math.h>
  20 #include  <sys/stdint.h>
  21 #include  <stdlib.h>
  22 #include  "gdtoa.h"
  23
  24 #ifdef __weak_alias
  25 __weak_alias(strtold, _strtold)
  26 #endif
  27
  28 #ifndef __HAVE_LONG_DOUBLE
  29 #error no extended-precision long double type
  30 #endif
  31
  32 #ifndef GDTOA_LD_FMT
  33 #error GDTOA_LD_FMT must be defined by format-specific source file
  34 #endif
  35
  36 #define STRTOP(x) __CONCAT(strtop, x)
  37
  38 long double
  39 strtold(const char *nptr, char **endptr)
  40 {
  41   long double ld;
  42
  43   (void)STRTOP(GDTOA_LD_FMT)(nptr, endptr, &ld);
  44   return ld;
  45 }