projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 9385eb3d A |
1 | /**************************************************************** |
| 2 | ||
| 3 | The author of this software is David M. Gay. | |
| 4 | ||
| 5 | Copyright (C) 1998, 2000 by Lucent Technologies | |
| 6 | All Rights Reserved | |
| 7 | ||
| 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. | |
| 17 | ||
| 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. | |
| 26 | ||
| 27 | ****************************************************************/ | |
| 28 | ||
| 3d9156a7 A |
29 | /* Please send bug reports to David M. Gay (dmg at acm dot org, |
| 30 | * with " at " changed at "@" and " dot " changed to "."). */ | |
| 9385eb3d A |
31 | |
| 32 | #include "gdtoaimp.h" | |
| 33 | ||
| 34 | float | |
| 35 | #ifdef KR_headers | |
| 36 | strtof(s, sp) CONST char *s; char **sp; | |
| 37 | #else | |
| 38 | strtof(CONST char *s, char **sp) | |
| 39 | #endif | |
| 40 | { | |
| 3d9156a7 | 41 | static FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, SI }; |
| 9385eb3d A |
42 | ULong bits[1]; |
| 43 | Long exp; | |
| 44 | int k; | |
| 45 | union { ULong L[1]; float f; } u; | |
| 46 | ||
| 47 | k = strtodg(s, sp, &fpi, &exp, bits); | |
| 48 | switch(k & STRTOG_Retmask) { | |
| 49 | case STRTOG_NoNumber: | |
| 50 | case STRTOG_Zero: | |
| 51 | u.L[0] = 0; | |
| 52 | break; | |
| 53 | ||
| 54 | case STRTOG_Normal: | |
| 55 | case STRTOG_NaNbits: | |
| 56 | u.L[0] = bits[0] & 0x7fffff | exp + 0x7f + 23 << 23; | |
| 57 | break; | |
| 58 | ||
| 59 | case STRTOG_Denormal: | |
| 60 | u.L[0] = bits[0]; | |
| 61 | break; | |
| 62 | ||
| 63 | case STRTOG_Infinite: | |
| 64 | u.L[0] = 0x7f800000; | |
| 65 | break; | |
| 66 | ||
| 67 | case STRTOG_NaN: | |
| 3d9156a7 | 68 | u.L[0] = f_QNAN; |
| 9385eb3d A |
69 | } |
| 70 | if (k & STRTOG_Neg) | |
| 71 | u.L[0] |= 0x80000000L; | |
| 72 | return u.f; | |
| 73 | } |