1/****************************************************************
2
3The author of this software is David M. Gay.
4
5Copyright (C) 1998, 2000 by Lucent Technologies
6All Rights Reserved
7
8Permission to use, copy, modify, and distribute this software and
9its documentation for any purpose and without fee is hereby
10granted, provided that the above copyright notice appear in all
11copies and that both that the copyright notice and this
12permission notice and warranty disclaimer appear in supporting
13documentation, and that the name of Lucent or any of its entities
14not be used in advertising or publicity pertaining to
15distribution of the software without specific, written prior
16permission.
17
18LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
20IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
21SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
23IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
24ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
25THIS 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/* $FreeBSD$ */
33
34#include "gdtoaimp.h"
35
36#undef _0
37#undef _1
38
39/* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
40
41#ifdef IEEE_MC68k
42#define _0 0
43#define _1 1
44#define _2 2
45#define _3 3
46#define _4 4
47#endif
48#ifdef IEEE_8087
49#define _0 4
50#define _1 3
51#define _2 2
52#define _3 1
53#define _4 0
54#endif
55
56 void
57#ifdef KR_headers
58ULtox(L, bits, exp, k) UShort *L; ULong *bits; Long exp; int k;
59#else
60ULtox(UShort *L, ULong *bits, Long exp, int k)
61#endif
62{
63	switch(k & STRTOG_Retmask) {
64	  case STRTOG_NoNumber:
65	  case STRTOG_Zero:
66		L[0] = L[1] = L[2] = L[3] = L[4] = 0;
67		break;
68
69	  case STRTOG_Denormal:
70		L[_0] = 0;
71		goto normal_bits;
72
73	  case STRTOG_Normal:
74		L[_0] = exp + 0x3fff + 63;
75 normal_bits:
76		L[_4] = (UShort)bits[0];
77		L[_3] = (UShort)(bits[0] >> 16);
78		L[_2] = (UShort)bits[1];
79		L[_1] = (UShort)(bits[1] >> 16);
80		break;
81
82	  case STRTOG_NaNbits:
83		L[_0] = exp + 0x3fff + 63;
84		L[_4] = (UShort)bits[0];
85		L[_3] = (UShort)(bits[0] >> 16);
86		L[_2] = (UShort)bits[1];
87		L[_1] = (UShort)((bits[1] >> 16) | (3 << 14));
88		break;
89
90	  case STRTOG_Infinite:
91		L[_0] = 0x7fff;
92		L[_1] = 0x8000;
93		L[_2] = L[_3] = L[_4] = 0;
94		break;
95
96	  case STRTOG_NaN:
97		L[0] = ldus_QNAN0;
98		L[1] = ldus_QNAN1;
99		L[2] = ldus_QNAN2;
100		L[3] = ldus_QNAN3;
101		L[4] = ldus_QNAN4;
102	  }
103	if (k & STRTOG_Neg)
104		L[_0] |= 0x8000;
105	}
106
107 int
108#ifdef KR_headers
109strtorx_l(s, sp, rounding, L, locale) CONST char *s; char **sp; int rounding;
110void *L; locale_t locale;
111#else
112strtorx_l(CONST char *s, char **sp, int rounding, void *L, locale_t locale)
113#endif
114{
115	static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI };
116	FPI *fpi, fpi1;
117	ULong bits[2];
118	Long exp;
119	int k;
120
121	fpi = &fpi0;
122	if (rounding != FPI_Round_near) {
123		fpi1 = fpi0;
124		fpi1.rounding = rounding;
125		fpi = &fpi1;
126		}
127	k = strtodg_l(s, sp, fpi, &exp, bits, locale);
128	ULtox((UShort*)L, bits, exp, k);
129	return k;
130	}
131