| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame] | 1 | /* $NetBSD: strtopx.c,v 1.3.14.1 2008/04/08 21:10:55 jdc Exp $ */
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| 2 |
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| 3 | /****************************************************************
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| 4 |
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| 5 | The author of this software is David M. Gay.
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| 6 |
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| 7 | Copyright (C) 1998, 2000 by Lucent Technologies
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| 8 | All Rights Reserved
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| 9 |
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| 10 | Permission to use, copy, modify, and distribute this software and
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| 11 | its documentation for any purpose and without fee is hereby
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| 12 | granted, provided that the above copyright notice appear in all
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| 13 | copies and that both that the copyright notice and this
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| 14 | permission notice and warranty disclaimer appear in supporting
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| 15 | documentation, and that the name of Lucent or any of its entities
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| 16 | not be used in advertising or publicity pertaining to
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| 17 | distribution of the software without specific, written prior
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| 18 | permission.
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| 19 |
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| 20 | LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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| 21 | INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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| 22 | IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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| 23 | SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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| 24 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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| 25 | IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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| 26 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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| 27 | THIS SOFTWARE.
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| 28 |
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| 29 | ****************************************************************/
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| 30 |
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| 31 | /* Please send bug reports to David M. Gay (dmg at acm dot org,
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| 32 | * with " at " changed at "@" and " dot " changed to "."). */
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| 33 | #include <LibConfig.h>
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| 34 |
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| 35 | #include "gdtoaimp.h"
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| 36 |
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| 37 | #undef _0
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| 38 | #undef _1
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| 39 |
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| 40 | /* one or the other of IEEE_BIG_ENDIAN or IEEE_LITTLE_ENDIAN should be #defined */
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| 41 |
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| 42 | #ifdef IEEE_BIG_ENDIAN
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| 43 | #define _0 0
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| 44 | #define _1 1
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| 45 | #define _2 2
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| 46 | #define _3 3
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| 47 | #define _4 4
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| 48 | #endif
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| 49 | #ifdef IEEE_LITTLE_ENDIAN
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| 50 | #define _0 4
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| 51 | #define _1 3
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| 52 | #define _2 2
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| 53 | #define _3 1
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| 54 | #define _4 0
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| 55 | #endif
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| 56 |
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| 57 | int
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| 58 | #ifdef KR_headers
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| 59 | strtopx(s, sp, V) CONST char *s; char **sp; void *V;
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| 60 | #else
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| 61 | strtopx(CONST char *s, char **sp, void *V)
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| 62 | #endif
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| 63 | {
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| 64 | static CONST FPI fpi = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI };
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| 65 | ULong bits[2];
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| 66 | Long expt;
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| 67 | int k;
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| 68 | UShort *L = (UShort*)V;
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| 69 |
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| 70 | k = strtodg(s, sp, &fpi, &expt, bits);
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| 71 | if (k == STRTOG_NoMemory)
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| 72 | return k;
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| 73 | switch(k & STRTOG_Retmask) {
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| 74 | case STRTOG_NoNumber:
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| 75 | case STRTOG_Zero:
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| 76 | L[0] = L[1] = L[2] = L[3] = L[4] = 0;
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| 77 | break;
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| 78 |
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| 79 | case STRTOG_Denormal:
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| 80 | L[_0] = 0;
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| 81 | goto normal_bits;
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| 82 |
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| 83 | case STRTOG_Normal:
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| 84 | case STRTOG_NaNbits:
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| 85 | L[_0] = (UShort)(expt + 0x3fff + 63);
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| 86 | normal_bits:
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| 87 | L[_4] = (UShort)bits[0];
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| 88 | L[_3] = (UShort)(bits[0] >> 16);
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| 89 | L[_2] = (UShort)bits[1];
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| 90 | L[_1] = (UShort)(bits[1] >> 16);
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| 91 | break;
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| 92 |
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| 93 | case STRTOG_Infinite:
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| 94 | L[_0] = 0x7fff;
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| 95 | L[_1] = L[_2] = L[_3] = L[_4] = 0;
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| 96 | break;
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| 97 |
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| 98 | case STRTOG_NaN:
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| 99 | L[0] = ldus_QNAN0;
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| 100 | L[1] = ldus_QNAN1;
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| 101 | L[2] = ldus_QNAN2;
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| 102 | L[3] = ldus_QNAN3;
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| 103 | L[4] = ldus_QNAN4;
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| 104 | }
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| 105 | if (k & STRTOG_Neg)
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| 106 | L[_0] |= 0x8000;
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| 107 | return k;
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| 108 | }
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