1/* Decimal 32-bit format module header for the decNumber C Library.
2 Copyright (C) 2005-2017 Free Software Foundation, Inc.
3 Contributed by IBM Corporation. Author Mike Cowlishaw.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24<http://www.gnu.org/licenses/>. */
25
26/* ------------------------------------------------------------------ */
27/* Decimal 32-bit format module header */
28/* ------------------------------------------------------------------ */
29
30#if !defined(DECIMAL32)
31 #define DECIMAL32
32 #define DEC32NAME "decimal32" /* Short name */
33 #define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */
34 #define DEC32AUTHOR "Mike Cowlishaw" /* Who to blame */
35
36 /* parameters for decimal32s */
37 #define DECIMAL32_Bytes 4 /* length */
38 #define DECIMAL32_Pmax 7 /* maximum precision (digits) */
39 #define DECIMAL32_Emax 96 /* maximum adjusted exponent */
40 #define DECIMAL32_Emin -95 /* minimum adjusted exponent */
41 #define DECIMAL32_Bias 101 /* bias for the exponent */
42 #define DECIMAL32_String 15 /* maximum string length, +1 */
43 #define DECIMAL32_EconL 6 /* exp. continuation length */
44 /* highest biased exponent (Elimit-1) */
45 #define DECIMAL32_Ehigh (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1)
46
47 /* check enough digits, if pre-defined */
48 #if defined(DECNUMDIGITS)
49 #if (DECNUMDIGITS<DECIMAL32_Pmax)
50 #error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use
51 #endif
52 #endif
53
54 #ifndef DECNUMDIGITS
55 #define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/
56 #endif
57 #ifndef DECNUMBER
58 #include "decNumber.h" /* context and number library */
59 #endif
60
61 /* Decimal 32-bit type, accessible by bytes */
62 typedef struct {
63 uint8_t bytes[DECIMAL32_Bytes]; /* decimal32: 1, 5, 6, 20 bits*/
64 } decimal32;
65
66 /* special values [top byte excluding sign bit; last two bits are */
67 /* don't-care for Infinity on input, last bit don't-care for NaN] */
68 #if !defined(DECIMAL_NaN)
69 #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */
70 #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */
71 #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */
72 #endif
73
74 /* ---------------------------------------------------------------- */
75 /* Routines */
76 /* ---------------------------------------------------------------- */
77
78#include "decimal32Symbols.h"
79
80 #ifdef __cplusplus
81 extern "C" {
82 #endif
83
84 /* String conversions */
85 decimal32 * decimal32FromString(decimal32 *, const char *, decContext *);
86 char * decimal32ToString(const decimal32 *, char *);
87 char * decimal32ToEngString(const decimal32 *, char *);
88
89 /* decNumber conversions */
90 decimal32 * decimal32FromNumber(decimal32 *, const decNumber *,
91 decContext *);
92 decNumber * decimal32ToNumber(const decimal32 *, decNumber *);
93
94 /* Format-dependent utilities */
95 uint32_t decimal32IsCanonical(const decimal32 *);
96 decimal32 * decimal32Canonical(decimal32 *, const decimal32 *);
97
98 #ifdef __cplusplus
99 }
100 #endif
101
102#endif
103