summaryrefslogtreecommitdiff
path: root/libdecnumber/bid/decimal32.c
blob: 1cd760759c2c82b7ea577d4e0b050be9da82c5f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
/* Copyright (C) 2007, 2009
   Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#define decimal32FromString __dpd32FromString
#define decimal32ToString __dpd32ToString
#define decimal32ToEngString __dpd32ToEngString
#define decimal32FromNumber __dpd32FromNumber
#define decimal32ToNumber __dpd32ToNumber

#include "dpd/decimal32.c"

#undef decimal32FromString
#undef decimal32ToString
#undef decimal32ToEngString
#undef decimal32FromNumber
#undef decimal32ToNumber

#include "bid-dpd.h"

#ifdef IN_LIBGCC2
#define decimal32FromString __decimal32FromString
#define decimal32ToString __decimal32ToString
#define decimal32ToEngString __decimal32ToEngString
#define decimal32FromNumber __decimal32FromNumber
#define decimal32ToNumber __decimal32ToNumber
#endif

decimal32 *decimal32FromString (decimal32 *, const char *, decContext *);
char *decimal32ToString (const decimal32 *, char *);
char *decimal32ToEngString (const decimal32 *, char *);
decimal32 *decimal32FromNumber (decimal32 *, const decNumber *, decContext *);
decNumber *decimal32ToNumber (const decimal32 *, decNumber *);

void __host_to_ieee_32 (_Decimal32 in, decimal32 *out);
void __ieee_to_host_32 (decimal32 in, _Decimal32 *out);

decimal32 *
decimal32FromNumber (decimal32 *d32, const decNumber *dn,
		      decContext *set)
{
  /* decimal32 and _Decimal32 are different types.  */
  union
    {
      _Decimal32 _Dec;
      decimal32 dec;
    } u;

  __dpd32FromNumber (d32, dn, set);

  /* __dpd32FromNumber returns in big endian. But _dpd_to_bid32 takes
     host endian. */
  __ieee_to_host_32 (*d32, &u._Dec);

  /* Convert DPD to BID.  */
  _dpd_to_bid32 (&u._Dec, &u._Dec);

  /* dfp.c is in bid endian. */
  __host_to_ieee_32 (u._Dec, &u.dec);

  /* d32 is returned as a pointer to _Decimal32 here.  */
  *d32 = u.dec;

  return d32;
}

decNumber *
decimal32ToNumber (const decimal32 *bid32, decNumber *dn)
{
  /* decimal32 and _Decimal32 are different types.  */
  union
    {
      _Decimal32 _Dec;
      decimal32 dec;
    } u;

  /* bid32 is a pointer to _Decimal32 in bid endian. But _bid_to_dpd32
     takes host endian.  */
  __ieee_to_host_32 (*bid32, &u._Dec);

  /* Convert BID to DPD.  */
  _bid_to_dpd32 (&u._Dec, &u._Dec);

  /* __dpd32ToNumber is in bid endian.  */
  __host_to_ieee_32 (u._Dec, &u.dec);

  return __dpd32ToNumber (&u.dec, dn);
}

char *
decimal32ToString (const decimal32 *d32, char *string)
{
  decNumber dn;			/* work */
  decimal32ToNumber (d32, &dn);
  decNumberToString (&dn, string);
  return string;
}

char *
decimal32ToEngString (const decimal32 *d32, char *string)
{
  decNumber dn;			/* work */
  decimal32ToNumber (d32, &dn);
  decNumberToEngString (&dn, string);
  return string;
}

decimal32 *
decimal32FromString (decimal32 *result, const char *string,
		      decContext *set)
{
  decContext dc;		/* work */
  decNumber dn;			/* .. */

  decContextDefault (&dc, DEC_INIT_DECIMAL32);	/* no traps, please */
  dc.round = set->round;	/* use supplied rounding */

  decNumberFromString (&dn, string, &dc);	/* will round if needed */
  decimal32FromNumber (result, &dn, &dc);
  if (dc.status != 0)
    {				/* something happened */
      decContextSetStatus (set, dc.status);	/* .. pass it on */
    }
  return result;
}