| 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 | void
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| 41 | #ifdef KR_headers
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| 42 | ULtof(L, bits, exp, k) ULong *L; ULong *bits; Long exp; int k;
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| 43 | #else
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| 44 | ULtof(ULong *L, ULong *bits, Long exp, int k)
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| 45 | #endif
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| 46 | {
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| 47 | switch(k & STRTOG_Retmask) {
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| 48 | case STRTOG_NoNumber:
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| 49 | case STRTOG_Zero:
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| 50 | *L = 0;
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| 51 | break;
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| 52 |
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| 53 | case STRTOG_Normal:
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| 54 | case STRTOG_NaNbits:
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| 55 | L[0] = bits[0] & 0x7fffff | exp + 0x7f + 23 << 23;
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| 56 | break;
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| 57 |
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| 58 | case STRTOG_Denormal:
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| 59 | L[0] = bits[0];
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| 60 | break;
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| 61 |
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| 62 | case STRTOG_Infinite:
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| 63 | L[0] = 0x7f800000;
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| 64 | break;
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| 65 |
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| 66 | case STRTOG_NaN:
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| 67 | L[0] = 0x7fffffff;
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| 68 | }
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| 69 | if (k & STRTOG_Neg)
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| 70 | L[0] |= 0x80000000L;
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| 71 | }
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| 72 |
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| 73 | int
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| 74 | #ifdef KR_headers
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| 75 | strtorf(s, sp, rounding, f) CONST char *s; char **sp; int rounding; float *f;
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| 76 | #else
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| 77 | strtorf(CONST char *s, char **sp, int rounding, float *f)
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| 78 | #endif
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| 79 | {
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| 80 | static FPI fpi0 = { 24, 1-127-24+1, 254-127-24+1, 1, SI };
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| 81 | FPI *fpi, fpi1;
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| 82 | ULong bits[1];
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| 83 | Long exp;
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| 84 | int k;
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| 85 |
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| 86 | fpi = &fpi0;
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| 87 | if (rounding != FPI_Round_near) {
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| 88 | fpi1 = fpi0;
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| 89 | fpi1.rounding = rounding;
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| 90 | fpi = &fpi1;
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| 91 | }
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| 92 | k = strtodg(s, sp, fpi, &exp, bits);
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| 93 | ULtof((ULong*)f, bits, exp, k);
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| 94 | return k;
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| 95 | }
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