| 1 | /****************************************************************
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| 2 |
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| 3 | The author of this software is David M. Gay.
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| 4 |
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| 5 | Copyright (C) 1998, 2000 by Lucent Technologies
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| 6 | All Rights Reserved
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| 7 |
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| 8 | Permission to use, copy, modify, and distribute this software and
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| 9 | its documentation for any purpose and without fee is hereby
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| 10 | granted, provided that the above copyright notice appear in all
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| 11 | copies and that both that the copyright notice and this
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| 12 | permission notice and warranty disclaimer appear in supporting
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| 13 | documentation, and that the name of Lucent or any of its entities
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| 14 | not be used in advertising or publicity pertaining to
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| 15 | distribution of the software without specific, written prior
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| 16 | permission.
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| 17 |
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| 18 | LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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| 19 | INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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| 20 | IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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| 21 | SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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| 22 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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| 23 | IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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| 24 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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| 25 | THIS SOFTWARE.
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| 26 |
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| 27 | ****************************************************************/
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| 28 |
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| 29 | /* Please send bug reports to
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| 30 | David M. Gay
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| 31 | Bell Laboratories, Room 2C-463
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| 32 | 600 Mountain Avenue
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| 33 | Murray Hill, NJ 07974-0636
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| 34 | U.S.A.
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| 35 | dmg@bell-labs.com
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| 36 | */
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| 37 |
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| 38 | #include "gdtoaimp.h"
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| 39 |
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| 40 | #undef _0
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| 41 | #undef _1
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| 42 |
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| 43 | /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
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| 44 |
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| 45 | #ifdef IEEE_MC68k
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| 46 | #define _0 0
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| 47 | #define _1 1
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| 48 | #define _2 2
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| 49 | #define _3 3
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| 50 | #define _4 4
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| 51 | #endif
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| 52 | #ifdef IEEE_8087
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| 53 | #define _0 4
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| 54 | #define _1 3
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| 55 | #define _2 2
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| 56 | #define _3 1
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| 57 | #define _4 0
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| 58 | #endif
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| 59 |
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| 60 | int
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| 61 | #ifdef KR_headers
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| 62 | strtopx(s, sp, V) CONST char *s; char **sp; void *V;
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| 63 | #else
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| 64 | strtopx(CONST char *s, char **sp, void *V)
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| 65 | #endif
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| 66 | {
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| 67 | #ifdef Sudden_Underflow
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| 68 | static FPI fpi = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, 1 };
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| 69 | #else
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| 70 | static FPI fpi = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, 0 };
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| 71 | #endif
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| 72 | ULong bits[2];
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| 73 | Long exp;
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| 74 | int k;
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| 75 | UShort *L = (UShort*)V;
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| 76 |
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| 77 | k = strtodg(s, sp, &fpi, &exp, bits);
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| 78 | switch(k & STRTOG_Retmask) {
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| 79 | case STRTOG_NoNumber:
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| 80 | case STRTOG_Zero:
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| 81 | L[0] = L[1] = L[2] = L[3] = L[4] = 0;
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| 82 | break;
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| 83 |
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| 84 | case STRTOG_Normal:
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| 85 | case STRTOG_Denormal:
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| 86 | case STRTOG_NaNbits:
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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 | L[_0] = exp + 0x3fff + 63;
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| 92 | break;
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| 93 |
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| 94 | case STRTOG_Infinite:
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| 95 | L[_0] = 0x7fff;
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| 96 | L[_1] = L[_2] = L[_3] = L[_4] = 0;
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| 97 | break;
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| 98 |
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| 99 | case STRTOG_NaN:
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| 100 | L[_0] = 0x7fff;
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| 101 | L[_1] = L[_2] = L[_3] = L[_4] = (UShort)-1;
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| 102 | }
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| 103 | if (k & STRTOG_Neg)
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| 104 | L[_0] |= 0x8000;
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| 105 | return k;
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| 106 | }
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