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comparison libdecnumber/bid/decimal64.c @ 0:a06113de4d67

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first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 04ced10e8804
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-1:000000000000 0:a06113de4d67
1 /* Copyright (C) 2007, 2009
2 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
19
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
24
25 #define decimal64FromString __dpd64FromString
26 #define decimal64ToString __dpd64ToString
27 #define decimal64ToEngString __dpd64ToEngString
28 #define decimal64FromNumber __dpd64FromNumber
29 #define decimal64ToNumber __dpd64ToNumber
30
31 #include "dpd/decimal64.c"
32
33 #undef decimal64FromString
34 #undef decimal64ToString
35 #undef decimal64ToEngString
36 #undef decimal64FromNumber
37 #undef decimal64ToNumber
38
39 #include "bid-dpd.h"
40
41 #ifdef IN_LIBGCC2
42 #define decimal64FromString __decimal64FromString
43 #define decimal64ToString __decimal64ToString
44 #define decimal64ToEngString __decimal64ToEngString
45 #define decimal64FromNumber __decimal64FromNumber
46 #define decimal64ToNumber __decimal64ToNumber
47 #endif
48
49 decimal64 *decimal64FromString (decimal64 *, const char *, decContext *);
50 char *decimal64ToString (const decimal64 *, char *);
51 char *decimal64ToEngString (const decimal64 *, char *);
52 decimal64 *decimal64FromNumber (decimal64 *, const decNumber *, decContext *);
53 decNumber *decimal64ToNumber (const decimal64 *, decNumber *);
54
55 void __host_to_ieee_64 (_Decimal64 in, decimal64 *out);
56 void __ieee_to_host_64 (decimal64 in, _Decimal64 *out);
57
58 decimal64 *
59 decimal64FromNumber (decimal64 *d64, const decNumber *dn,
60 decContext *set)
61 {
62 /* decimal64 and _Decimal64 are different types. */
63 union
64 {
65 _Decimal64 _Dec;
66 decimal64 dec;
67 } u;
68
69 __dpd64FromNumber (d64, dn, set);
70
71 /* __dpd64FromNumber returns in big endian. But _dpd_to_bid64 takes
72 host endian. */
73 __ieee_to_host_64 (*d64, &u._Dec);
74
75 /* Convert DPD to BID. */
76 _dpd_to_bid64 (&u._Dec, &u._Dec);
77
78 /* dfp.c is in bid endian. */
79 __host_to_ieee_64 (u._Dec, &u.dec);
80
81 /* d64 is returned as a pointer to _Decimal64 here. */
82 *d64 = u.dec;
83
84 return d64;
85 }
86
87 decNumber *
88 decimal64ToNumber (const decimal64 *bid64, decNumber *dn)
89 {
90 /* decimal64 and _Decimal64 are different types. */
91 union
92 {
93 _Decimal64 _Dec;
94 decimal64 dec;
95 } u;
96
97 /* bid64 is a pointer to _Decimal64 in bid endian. But _bid_to_dpd64
98 takes host endian. */
99 __ieee_to_host_64 (*bid64, &u._Dec);
100
101 /* Convert BID to DPD. */
102 _bid_to_dpd64 (&u._Dec, &u._Dec);
103
104 /* __dpd64ToNumber is in bid endian. */
105 __host_to_ieee_64 (u._Dec, &u.dec);
106
107 return __dpd64ToNumber (&u.dec, dn);
108 }
109
110 char *
111 decimal64ToString (const decimal64 *d64, char *string)
112 {
113 decNumber dn; /* work */
114 decimal64ToNumber (d64, &dn);
115 decNumberToString (&dn, string);
116 return string;
117 }
118
119 char *
120 decimal64ToEngString (const decimal64 *d64, char *string)
121 {
122 decNumber dn; /* work */
123 decimal64ToNumber (d64, &dn);
124 decNumberToEngString (&dn, string);
125 return string;
126 }
127
128 decimal64 *
129 decimal64FromString (decimal64 *result, const char *string,
130 decContext *set)
131 {
132 decContext dc; /* work */
133 decNumber dn; /* .. */
134
135 decContextDefault (&dc, DEC_INIT_DECIMAL64); /* no traps, please */
136 dc.round = set->round; /* use supplied rounding */
137
138 decNumberFromString (&dn, string, &dc); /* will round if needed */
139 decimal64FromNumber (result, &dn, &dc);
140 if (dc.status != 0)
141 { /* something happened */
142 decContextSetStatus (set, dc.status); /* .. pass it on */
143 }
144 return result;
145 }