tmpfs - Fix tmpfs_fid, fix NFS exports
[dragonfly.git] / contrib / gdtoa / strtorx.c
blob50453cea69ddbd84d0a4b1954b518382eb082e62
1 /****************************************************************
3 The author of this software is David M. Gay.
5 Copyright (C) 1998, 2000 by Lucent Technologies
6 All Rights Reserved
8 Permission to use, copy, modify, and distribute this software and
9 its documentation for any purpose and without fee is hereby
10 granted, provided that the above copyright notice appear in all
11 copies and that both that the copyright notice and this
12 permission notice and warranty disclaimer appear in supporting
13 documentation, and that the name of Lucent or any of its entities
14 not be used in advertising or publicity pertaining to
15 distribution of the software without specific, written prior
16 permission.
18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
25 THIS SOFTWARE.
27 ****************************************************************/
29 /* Please send bug reports to David M. Gay (dmg at acm dot org,
30 * with " at " changed at "@" and " dot " changed to "."). */
32 /* $FreeBSD: head/contrib/gdtoa/strtorx.c 227753 2011-11-20 14:45:42Z theraven $ */
34 #include "gdtoaimp.h"
36 #undef _0
37 #undef _1
39 /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
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
56 void
57 #ifdef KR_headers
58 ULtox(L, bits, exp, k) UShort *L; ULong *bits; Long exp; int k;
59 #else
60 ULtox(UShort *L, ULong *bits, Long exp, int k)
61 #endif
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;
69 case STRTOG_Denormal:
70 L[_0] = 0;
71 goto normal_bits;
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;
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;
90 case STRTOG_Infinite:
91 L[_0] = 0x7fff;
92 L[_1] = 0x8000;
93 L[_2] = L[_3] = L[_4] = 0;
94 break;
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;
103 if (k & STRTOG_Neg)
104 L[_0] |= 0x8000;
108 #ifdef KR_headers
109 strtorx_l(s, sp, rounding, L, locale) CONST char *s; char **sp; int rounding;
110 void *L; locale_t locale;
111 #else
112 strtorx_l(CONST char *s, char **sp, int rounding, void *L, locale_t locale)
113 #endif
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;
121 fpi = &fpi0;
122 if (rounding != FPI_Round_near) {
123 fpi1 = fpi0;
124 fpi1.rounding = rounding;
125 fpi = &fpi1;
127 k = strtodg_l(s, sp, fpi, &exp, bits, locale);
128 ULtox((UShort*)L, bits, exp, k);
129 return k;