| | 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 | |
| | 29 | /* Please send bug reports to David M. Gay (dmg at acm dot org, |
| | 30 | * with " at " changed at "@" and " dot " changed to "."). */ |
| | 31 | |
| | 32 | #include "gdtoaimp.h" |
| | 33 | |
| | 34 | void |
| | 35 | #ifdef KR_headers |
| | 36 | ULtod(L, bits, exp, k) ULong *L; ULong *bits; Long exp; int k; |
| | 37 | #else |
| | 38 | ULtod(ULong *L, ULong *bits, Long exp, int k) |
| | 39 | #endif |
| | 40 | { |
| | 41 | switch(k & STRTOG_Retmask) { |
| | 42 | case STRTOG_NoNumber: |
| | 43 | case STRTOG_Zero: |
| | 44 | L[0] = L[1] = 0; |
| | 45 | break; |
| | 46 | |
| | 47 | case STRTOG_Denormal: |
| | 48 | L[_1] = bits[0]; |
| | 49 | L[_0] = bits[1]; |
| | 50 | break; |
| | 51 | |
| | 52 | case STRTOG_Normal: |
| | 53 | case STRTOG_NaNbits: |
| | 54 | L[_1] = bits[0]; |
| | 55 | L[_0] = (bits[1] & ~0x100000) | ((exp + 0x3ff + 52) << 20); |
| | 56 | break; |
| | 57 | |
| | 58 | case STRTOG_Infinite: |
| | 59 | L[_0] = 0x7ff00000; |
| | 60 | L[_1] = 0; |
| | 61 | break; |
| | 62 | |
| | 63 | case STRTOG_NaN: |
| | 64 | L[0] = d_QNAN0; |
| | 65 | L[1] = d_QNAN1; |
| | 66 | } |
| | 67 | if (k & STRTOG_Neg) |
| | 68 | L[_0] |= 0x80000000L; |
| | 69 | } |
| | 70 | |
| | 71 | int |
| | 72 | #ifdef KR_headers |
| | 73 | strtord(s, sp, rounding, d) CONST char *s; char **sp; int rounding; double *d; |
| | 74 | #else |
| | 75 | strtord(CONST char *s, char **sp, int rounding, double *d) |
| | 76 | #endif |
| | 77 | { |
| | 78 | static FPI fpi0 = { 53, 1-1023-53+1, 2046-1023-53+1, 1, SI }; |
| | 79 | FPI *fpi, fpi1; |
| | 80 | ULong bits[2]; |
| | 81 | Long exp; |
| | 82 | int k; |
| | 83 | |
| | 84 | fpi = &fpi0; |
| | 85 | if (rounding != FPI_Round_near) { |
| | 86 | fpi1 = fpi0; |
| | 87 | fpi1.rounding = rounding; |
| | 88 | fpi = &fpi1; |
| | 89 | } |
| | 90 | k = strtodg(s, sp, fpi, &exp, bits); |
| | 91 | ULtod((ULong*)d, bits, exp, k); |
| | 92 | return k; |
| | 93 | } |
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