stdlib/strtold.c

   1 #include <math.h>
   2
   3 #ifndef __NO_LONG_DOUBLE_MATH
   4 /* The actual implementation for all floating point sizes is in strtod.c.
   5    These macros tell it to produce the `long double' version, `strtold'.  */
   6
   7 # define FLOAT          long double
   8 # define FLT            LDBL
   9 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
  10 #  define STRTOF        __strtold_l
  11 # else
  12 #  define STRTOF        strtold
  13 # endif
  14 # define MPN2FLOAT      __mpn_construct_long_double
  15 # define FLOAT_HUGE_VAL HUGE_VALL
  16 # define SET_MANTISSA(flt, mant) \
  17   do { union ieee854_long_double u;                                           \
  18        u.d = (flt);                                                           \
  19        if ((mant & 0x7fffffffffffffffULL) == 0)                               \
  20          mant = 0x4000000000000000ULL;                                        \
  21        u.ieee.mantissa0 = (((mant) >> 32) & 0x7fffffff) | 0x80000000;         \
  22        u.ieee.mantissa1 = (mant) & 0xffffffff;                                \
  23        (flt) = u.d;                                                           \
  24   } while (0)
  25
  26 # include "strtod.c"
  27 #else
  28 /* There is no `long double' type, use the `double' implementations.  */
  29 long double
  30 __strtold_internal (const char *nptr, char **endptr, int group)
  31 {
  32   return __strtod_internal (nptr, endptr, group);
  33 }
  34
  35 long double
  36 strtold (const char *nptr, char **endptr)
  37 {
  38   return __strtod_internal (nptr, endptr, 0);
  39 }
  40 #endif