1 /****************************************************************
2
3 The author of this software is David M. Gay.
4
5 Copyright (C) 1998, 2000 by Lucent Technologies
6 All Rights Reserved
7
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.
17
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.
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 #include <_ansi.h>
33 #include <errno.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include "mprec.h"
37 #include "gdtoa.h"
38
39 #if defined (_HAVE_LONG_DOUBLE) && !defined (_LDBL_EQ_DBL) || 1
40
41 /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
42
43 #ifdef IEEE_MC68k
44 #define _0 0
45 #define _1 1
46 #define _2 2
47 #define _3 3
48 #define _4 4
49 #endif
50 #ifdef IEEE_8087
51 #define _0 4
52 #define _1 3
53 #define _2 2
54 #define _3 1
55 #define _4 0
56 #endif
57
58 void
59 #ifdef KR_headers
ULtox(L,bits,exp,k)60 ULtox(L, bits, exp, k) __UShort *L; __ULong *bits; Long exp; int k;
61 #else
62 ULtox(__UShort *L, __ULong *bits, Long exp, int k)
63 #endif
64 {
65 switch(k & STRTOG_Retmask) {
66 case STRTOG_NoNumber:
67 case STRTOG_Zero:
68 L[0] = L[1] = L[2] = L[3] = L[4] = 0;
69 break;
70
71 case STRTOG_Denormal:
72 L[_0] = 0;
73 goto normal_bits;
74
75 case STRTOG_Normal:
76 case STRTOG_NaNbits:
77 L[_0] = exp + 0x3fff + 63;
78 normal_bits:
79 L[_4] = (__UShort)bits[0];
80 L[_3] = (__UShort)(bits[0] >> 16);
81 L[_2] = (__UShort)bits[1];
82 L[_1] = (__UShort)(bits[1] >> 16);
83 break;
84
85 case STRTOG_Infinite:
86 L[_0] = 0x7fff;
87 L[_1] = 0x8000;
88 L[_2] = L[_3] = L[_4] = 0;
89 break;
90
91 case STRTOG_NaN:
92 *((long double*)L) = __builtin_nanl ("");
93 }
94 if (k & STRTOG_Neg)
95 L[_0] |= 0x8000;
96 }
97
98 int
99 #ifdef KR_headers
_strtorx_l(s,sp,rounding,L,loc)100 _strtorx_l(s, sp, rounding, L, loc) const char *s; char **sp; int rounding; void *L; locale_t loc;
101 #else
102 _strtorx_l(const char *s, char **sp, int rounding, void *L,
103 locale_t loc)
104 #endif
105 {
106 static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI };
107 FPI *fpi, fpi1;
108 __ULong bits[2];
109 Long exp;
110 int k;
111
112 fpi = &fpi0;
113 if (rounding != FPI_Round_near) {
114 fpi1 = fpi0;
115 fpi1.rounding = rounding;
116 fpi = &fpi1;
117 }
118 k = _strtodg_l(s, sp, fpi, &exp, bits, loc);
119 ULtox((__UShort*)L, bits, exp, k);
120 return k;
121 }
122
123 #endif /* _HAVE_LONG_DOUBLE && !_LDBL_EQ_DBL */
124