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f5bc1778 | 1 | /* Decimal 32-bit format module header for the decNumber C Library. |
f57a3bca | 2 | Copyright (C) 2005-2018 Free Software Foundation, Inc. |
f5bc1778 DJ |
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 | |
168a2f77 | 9 | Software Foundation; either version 3, or (at your option) any later |
f5bc1778 DJ |
10 | version. |
11 | ||
f5bc1778 DJ |
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 | ||
168a2f77 DD |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
f5bc1778 DJ |
25 | |
26 | /* ------------------------------------------------------------------ */ | |
27 | /* Decimal 32-bit format module header */ | |
28 | /* ------------------------------------------------------------------ */ | |
29 | ||
30 | #if !defined(DECIMAL32) | |
31 | #define DECIMAL32 | |
32 | #define DEC32NAME "decimal32" /* Short name */ | |
87d32bb7 | 33 | #define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */ |
f5bc1778 DJ |
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 */ | |
87d32bb7 | 44 | /* highest biased exponent (Elimit-1) */ |
f5bc1778 DJ |
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) | |
87d32bb7 | 69 | #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
f5bc1778 | 70 | #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
87d32bb7 | 71 | #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
f5bc1778 DJ |
72 | #endif |
73 | ||
74 | /* ---------------------------------------------------------------- */ | |
75 | /* Routines */ | |
76 | /* ---------------------------------------------------------------- */ | |
77 | ||
87d32bb7 | 78 | #include "decimal32Symbols.h" |
f5bc1778 | 79 | |
52d6785f DD |
80 | #ifdef __cplusplus |
81 | extern "C" { | |
82 | #endif | |
83 | ||
87d32bb7 | 84 | /* String conversions */ |
f5bc1778 DJ |
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 | ||
87d32bb7 | 94 | /* Format-dependent utilities */ |
f5bc1778 DJ |
95 | uint32_t decimal32IsCanonical(const decimal32 *); |
96 | decimal32 * decimal32Canonical(decimal32 *, const decimal32 *); | |
97 | ||
52d6785f DD |
98 | #ifdef __cplusplus |
99 | } | |
100 | #endif | |
101 | ||
f5bc1778 | 102 | #endif |