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 | #undef _0 | |
| 35 | #undef _1 | |
| 36 | ||
| 37 | /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */ | |
| 38 | ||
| 39 | #ifdef IEEE_MC68k | |
| 40 | #define _0 0 | |
| 41 | #define _1 1 | |
| 42 | #define _2 2 | |
| 43 | #define _3 3 | |
| 44 | #define _4 4 | |
| 45 | #endif | |
| 46 | #ifdef IEEE_8087 | |
| 47 | #define _0 4 | |
| 48 | #define _1 3 | |
| 49 | #define _2 2 | |
| 50 | #define _3 1 | |
| 51 | #define _4 0 | |
| 52 | #endif | |
| 53 | ||
| 54 | int | |
| 55 | #ifdef KR_headers | |
| 56 | strtopx(s, sp, V) CONST char *s; char **sp; void *V; | |
| 57 | #else | |
| 58 | strtopx(CONST char *s, char **sp, void *V) | |
| 59 | #endif | |
| 60 | { | |
| 3d9156a7 | 61 | static FPI fpi = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI }; |
| 9385eb3d A |
62 | ULong bits[2]; |
| 63 | Long exp; | |
| 64 | int k; | |
| 65 | UShort *L = (UShort*)V; | |
| 66 | ||
| 67 | k = strtodg(s, sp, &fpi, &exp, bits); | |
| 68 | switch(k & STRTOG_Retmask) { | |
| 69 | case STRTOG_NoNumber: | |
| 70 | case STRTOG_Zero: | |
| 71 | L[0] = L[1] = L[2] = L[3] = L[4] = 0; | |
| 72 | break; | |
| 73 | ||
| 9385eb3d | 74 | case STRTOG_Denormal: |
| 3d9156a7 A |
75 | L[_0] = 0; |
| 76 | goto normal_bits; | |
| 77 | ||
| 78 | case STRTOG_Normal: | |
| 9385eb3d | 79 | case STRTOG_NaNbits: |
| 3d9156a7 A |
80 | L[_0] = exp + 0x3fff + 63; |
| 81 | normal_bits: | |
| 9385eb3d A |
82 | L[_4] = (UShort)bits[0]; |
| 83 | L[_3] = (UShort)(bits[0] >> 16); | |
| 84 | L[_2] = (UShort)bits[1]; | |
| 85 | L[_1] = (UShort)(bits[1] >> 16); | |
| 9385eb3d A |
86 | break; |
| 87 | ||
| 88 | case STRTOG_Infinite: | |
| 89 | L[_0] = 0x7fff; | |
| 90 | L[_1] = L[_2] = L[_3] = L[_4] = 0; | |
| 91 | break; | |
| 92 | ||
| 93 | case STRTOG_NaN: | |
| 3d9156a7 A |
94 | L[0] = ldus_QNAN0; |
| 95 | L[1] = ldus_QNAN1; | |
| 96 | L[2] = ldus_QNAN2; | |
| 97 | L[3] = ldus_QNAN3; | |
| 98 | L[4] = ldus_QNAN4; | |
| 9385eb3d A |
99 | } |
| 100 | if (k & STRTOG_Neg) | |
| 101 | L[_0] |= 0x8000; | |
| 102 | return k; | |
| 103 | } |