| /**************************************************************** |
| |
| The author of this software is David M. Gay. |
| |
| Copyright (C) 1998, 2000 by Lucent Technologies |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and |
| its documentation for any purpose and without fee is hereby |
| granted, provided that the above copyright notice appear in all |
| copies and that both that the copyright notice and this |
| permission notice and warranty disclaimer appear in supporting |
| documentation, and that the name of Lucent or any of its entities |
| not be used in advertising or publicity pertaining to |
| distribution of the software without specific, written prior |
| permission. |
| |
| LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. |
| IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY |
| SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER |
| IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF |
| THIS SOFTWARE. |
| |
| ****************************************************************/ |
| |
| /* Please send bug reports to |
| David M. Gay |
| Bell Laboratories, Room 2C-463 |
| 600 Mountain Avenue |
| Murray Hill, NJ 07974-0636 |
| U.S.A. |
| dmg@bell-labs.com |
| */ |
| |
| #include "gdtoaimp.h" |
| |
| float |
| #ifdef KR_headers |
| strtof(s, sp) CONST char *s; char **sp; |
| #else |
| strtof(CONST char *s, char **sp) |
| #endif |
| { |
| #ifdef Sudden_Underflow |
| static FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, 1 }; |
| #else |
| static FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, 0 }; |
| #endif |
| ULong bits[1]; |
| Long exp; |
| int k; |
| union { ULong L[1]; float f; } u; |
| |
| k = strtodg(s, sp, &fpi, &exp, bits); |
| switch(k & STRTOG_Retmask) { |
| case STRTOG_NoNumber: |
| case STRTOG_Zero: |
| u.L[0] = 0; |
| break; |
| |
| case STRTOG_Normal: |
| case STRTOG_NaNbits: |
| u.L[0] = bits[0] & 0x7fffff | exp + 0x7f + 23 << 23; |
| break; |
| |
| case STRTOG_Denormal: |
| u.L[0] = bits[0]; |
| break; |
| |
| case STRTOG_Infinite: |
| u.L[0] = 0x7f800000; |
| break; |
| |
| case STRTOG_NaN: |
| u.L[0] = 0x7fffffff; |
| } |
| if (k & STRTOG_Neg) |
| u.L[0] |= 0x80000000L; |
| return u.f; |
| } |