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1 /****************************************************************

3 The author of this software is David M. Gay.

8 Permission to use, copy, modify, and distribute this software and

9 its documentation for any purpose and without fee is hereby

10 granted, provided that the above copyright notice appear in all

11 copies and that both that the copyright notice and this

12 permission notice and warranty disclaimer appear in supporting

13 documentation, and that the name of Lucent or any of its entities

14 not be used in advertising or publicity pertaining to

15 distribution of the software without specific, written prior

16 permission.

18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,

19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.

20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY

21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER

23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,

24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF

25 THIS SOFTWARE.

27 ****************************************************************/

29 /* Please send bug reports to David M. Gay (dmg at acm dot org,

30 * with " at " changed at "@" and " dot " changed to "."). */

32 #include "xlocale_private.h"

34 #include "gdtoaimp.h"

36 float

37 #ifdef KR_headers

 strtof_l(s, sp, loc) CONST char *s; char **sp; locale_t loc;

39 #else

 strtof_l(CONST char *s, char **sp, locale_t loc)

41 #endif

42 {

         static CONST FPI fpi0 = { 24, 1-127-24+1,  254-127-24+1, 1, SI };

44 ULong bits[1];

45 Long exp;

46 int k;

         union { ULong L[1]; float f; } u;

48 #ifdef Honor_FLT_ROUNDS

49 #include "gdtoa_fltrnds.h"

50 #else

51 #define fpi &fpi0

52 #endif

54 NORMALIZE_LOCALE(loc);

         k = strtodg(s, sp, fpi, &exp, bits, loc);

56 switch(k & STRTOG_Retmask) {

57 case STRTOG_NoNumber:

                 u.L[0] = 0;

59 return u.f; // avoid setting sign

61 case STRTOG_Zero:

                 u.L[0] = 0;

63 break;

65 case STRTOG_Normal:

66 case STRTOG_NaNbits:

                 u.L[0] = (bits[0] & 0x7fffff) | ((exp + 0x7f + 23) << 23);

68 break;

70 case STRTOG_Denormal:

                 u.L[0] = bits[0];

72 break;

74 case STRTOG_Infinite:

                 u.L[0] = 0x7f800000;

76 break;

78 case STRTOG_NaN:

                 u.L[0] = f_QNAN;

80 }

81 if (k & STRTOG_Neg)

                 u.L[0] |= 0x80000000L;

83 return u.f;

84 }

86 float

87 #ifdef KR_headers

 strtof(s, sp) CONST char *s; char **sp;

89 #else

 strtof(CONST char *s, char **sp)

91 #endif

92 {

         return strtof_l(s, sp, __current_locale());

94 }