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comparison libdecnumber/bid/decimal32.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 decimal32FromString __dpd32FromString
26 #define decimal32ToString __dpd32ToString
27 #define decimal32ToEngString __dpd32ToEngString
28 #define decimal32FromNumber __dpd32FromNumber
29 #define decimal32ToNumber __dpd32ToNumber
30
31 #include "dpd/decimal32.c"
32
33 #undef decimal32FromString
34 #undef decimal32ToString
35 #undef decimal32ToEngString
36 #undef decimal32FromNumber
37 #undef decimal32ToNumber
38
39 #include "bid-dpd.h"
40
41 #ifdef IN_LIBGCC2
42 #define decimal32FromString __decimal32FromString
43 #define decimal32ToString __decimal32ToString
44 #define decimal32ToEngString __decimal32ToEngString
45 #define decimal32FromNumber __decimal32FromNumber
46 #define decimal32ToNumber __decimal32ToNumber
47 #endif
48
49 decimal32 *decimal32FromString (decimal32 *, const char *, decContext *);
50 char *decimal32ToString (const decimal32 *, char *);
51 char *decimal32ToEngString (const decimal32 *, char *);
52 decimal32 *decimal32FromNumber (decimal32 *, const decNumber *, decContext *);
53 decNumber *decimal32ToNumber (const decimal32 *, decNumber *);
54
55 void __host_to_ieee_32 (_Decimal32 in, decimal32 *out);
56 void __ieee_to_host_32 (decimal32 in, _Decimal32 *out);
57
58 decimal32 *
59 decimal32FromNumber (decimal32 *d32, const decNumber *dn,
60 decContext *set)
61 {
62 /* decimal32 and _Decimal32 are different types. */
63 union
64 {
65 _Decimal32 _Dec;
66 decimal32 dec;
67 } u;
68
69 __dpd32FromNumber (d32, dn, set);
70
71 /* __dpd32FromNumber returns in big endian. But _dpd_to_bid32 takes
72 host endian. */
73 __ieee_to_host_32 (*d32, &u._Dec);
74
75 /* Convert DPD to BID. */
76 _dpd_to_bid32 (&u._Dec, &u._Dec);
77
78 /* dfp.c is in bid endian. */
79 __host_to_ieee_32 (u._Dec, &u.dec);
80
81 /* d32 is returned as a pointer to _Decimal32 here. */
82 *d32 = u.dec;
83
84 return d32;
85 }
86
87 decNumber *
88 decimal32ToNumber (const decimal32 *bid32, decNumber *dn)
89 {
90 /* decimal32 and _Decimal32 are different types. */
91 union
92 {
93 _Decimal32 _Dec;
94 decimal32 dec;
95 } u;
96
97 /* bid32 is a pointer to _Decimal32 in bid endian. But _bid_to_dpd32
98 takes host endian. */
99 __ieee_to_host_32 (*bid32, &u._Dec);
100
101 /* Convert BID to DPD. */
102 _bid_to_dpd32 (&u._Dec, &u._Dec);
103
104 /* __dpd32ToNumber is in bid endian. */
105 __host_to_ieee_32 (u._Dec, &u.dec);
106
107 return __dpd32ToNumber (&u.dec, dn);
108 }
109
110 char *
111 decimal32ToString (const decimal32 *d32, char *string)
112 {
113 decNumber dn; /* work */
114 decimal32ToNumber (d32, &dn);
115 decNumberToString (&dn, string);
116 return string;
117 }
118
119 char *
120 decimal32ToEngString (const decimal32 *d32, char *string)
121 {
122 decNumber dn; /* work */
123 decimal32ToNumber (d32, &dn);
124 decNumberToEngString (&dn, string);
125 return string;
126 }
127
128 decimal32 *
129 decimal32FromString (decimal32 *result, const char *string,
130 decContext *set)
131 {
132 decContext dc; /* work */
133 decNumber dn; /* .. */
134
135 decContextDefault (&dc, DEC_INIT_DECIMAL32); /* no traps, please */
136 dc.round = set->round; /* use supplied rounding */
137
138 decNumberFromString (&dn, string, &dc); /* will round if needed */
139 decimal32FromNumber (result, &dn, &dc);
140 if (dc.status != 0)
141 { /* something happened */
142 decContextSetStatus (set, dc.status); /* .. pass it on */
143 }
144 return result;
145 }