| 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 | #endif
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| 51 | #ifdef IEEE_8087
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| 52 | #define _0 3
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| 53 | #define _1 2
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| 54 | #define _2 1
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| 55 | #define _3 0
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| 56 | #endif
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| 57 |
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| 58 | char*
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| 59 | #ifdef KR_headers
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| 60 | g_Qfmt(buf, V, ndig, bufsize) char *buf; char *V; int ndig; unsigned bufsize;
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| 61 | #else
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| 62 | g_Qfmt(char *buf, void *V, int ndig, unsigned bufsize)
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| 63 | #endif
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| 64 | {
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| 65 | static FPI fpi = { 113, 1-16383-113+1, 32766 - 16383 - 113 + 1, 1, 0 };
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| 66 | char *b, *s, *se;
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| 67 | ULong bits[4], *L, sign;
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| 68 | int decpt, ex, i, mode;
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| 69 |
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| 70 | if (ndig < 0)
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| 71 | ndig = 0;
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| 72 | if (bufsize < ndig + 10)
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| 73 | return 0;
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| 74 |
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| 75 | L = (ULong*)V;
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| 76 | sign = L[_0] & 0x80000000L;
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| 77 | bits[3] = L[_0] & 0xffff;
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| 78 | bits[2] = L[_1];
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| 79 | bits[1] = L[_2];
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| 80 | bits[0] = L[_3];
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| 81 | b = buf;
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| 82 | if ( (ex = (L[_0] & 0x7fff0000L) >> 16) !=0) {
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| 83 | if (ex == 0x7fff) {
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| 84 | /* Infinity or NaN */
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| 85 | if (bits[0] | bits[1] | bits[2] | bits[3])
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| 86 | b = strcpy(b, "NaN");
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| 87 | else {
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| 88 | b = buf;
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| 89 | if (sign)
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| 90 | *b++ = '-';
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| 91 | b = strcp(b, "Infinity");
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| 92 | }
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| 93 | return b;
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| 94 | }
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| 95 | i = STRTOG_Normal;
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| 96 | bits[3] |= 0x10000;
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| 97 | }
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| 98 | else if (bits[0] | bits[1] | bits[2] | bits[3]) {
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| 99 | i = STRTOG_Denormal;
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| 100 | ex = 1;
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| 101 | }
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| 102 | else {
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| 103 | #ifndef IGNORE_ZERO_SIGN
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| 104 | if (sign)
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| 105 | *b++ = '-';
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| 106 | #endif
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| 107 | *b++ = '0';
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| 108 | *b = 0;
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| 109 | return b;
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| 110 | }
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| 111 | ex -= 0x3fff + 112;
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| 112 | mode = 2;
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| 113 | if (ndig <= 0) {
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| 114 | if (bufsize < 48)
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| 115 | return 0;
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| 116 | mode = 0;
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| 117 | }
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| 118 | s = gdtoa(&fpi, ex, bits, &i, mode, ndig, &decpt, &se);
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| 119 | return g__fmt(buf, s, se, decpt, sign);
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| 120 | }
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