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1 | /* Decimal 64-bit format module header for the decNumber C Library. |
2 | Copyright (C) 2005, 2007 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 2, or (at your option) any later | |
10 | version. | |
11 | ||
12 | In addition to the permissions in the GNU General Public License, | |
13 | the Free Software Foundation gives you unlimited permission to link | |
14 | the compiled version of this file into combinations with other | |
15 | programs, and to distribute those combinations without any | |
16 | restriction coming from the use of this file. (The General Public | |
17 | License restrictions do apply in other respects; for example, they | |
18 | cover modification of the file, and distribution when not linked | |
19 | into a combine executable.) | |
20 | ||
21 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
22 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
23 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
24 | for more details. | |
25 | ||
26 | You should have received a copy of the GNU General Public License | |
27 | along with GCC; see the file COPYING. If not, write to the Free | |
28 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA | |
29 | 02110-1301, USA. */ | |
30 | ||
31 | /* ------------------------------------------------------------------ */ | |
32 | /* Decimal 64-bit format module header */ | |
33 | /* ------------------------------------------------------------------ */ | |
34 | ||
35 | #if !defined(DECIMAL64) | |
36 | #define DECIMAL64 | |
37 | #define DEC64NAME "decimal64" /* Short name */ | |
38 | #define DEC64FULLNAME "Decimal 64-bit Number" /* Verbose name */ | |
39 | #define DEC64AUTHOR "Mike Cowlishaw" /* Who to blame */ | |
40 | ||
41 | ||
42 | /* parameters for decimal64s */ | |
43 | #define DECIMAL64_Bytes 8 /* length */ | |
44 | #define DECIMAL64_Pmax 16 /* maximum precision (digits) */ | |
45 | #define DECIMAL64_Emax 384 /* maximum adjusted exponent */ | |
46 | #define DECIMAL64_Emin -383 /* minimum adjusted exponent */ | |
47 | #define DECIMAL64_Bias 398 /* bias for the exponent */ | |
48 | #define DECIMAL64_String 24 /* maximum string length, +1 */ | |
49 | #define DECIMAL64_EconL 8 /* exp. continuation length */ | |
50 | /* highest biased exponent (Elimit-1) */ | |
51 | #define DECIMAL64_Ehigh (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1) | |
52 | ||
53 | /* check enough digits, if pre-defined */ | |
54 | #if defined(DECNUMDIGITS) | |
55 | #if (DECNUMDIGITS<DECIMAL64_Pmax) | |
56 | #error decimal64.h needs pre-defined DECNUMDIGITS>=16 for safe use | |
57 | #endif | |
58 | #endif | |
59 | ||
60 | ||
61 | #ifndef DECNUMDIGITS | |
62 | #define DECNUMDIGITS DECIMAL64_Pmax /* size if not already defined*/ | |
63 | #endif | |
64 | #ifndef DECNUMBER | |
65 | #include "decNumber.h" /* context and number library */ | |
66 | #endif | |
67 | ||
68 | /* Decimal 64-bit type, accessible by bytes */ | |
69 | typedef struct { | |
70 | uint8_t bytes[DECIMAL64_Bytes]; /* decimal64: 1, 5, 8, 50 bits*/ | |
71 | } decimal64; | |
72 | ||
73 | /* special values [top byte excluding sign bit; last two bits are */ | |
74 | /* don't-care for Infinity on input, last bit don't-care for NaN] */ | |
75 | #if !defined(DECIMAL_NaN) | |
76 | #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ | |
77 | #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ | |
78 | #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ | |
79 | #endif | |
80 | ||
81 | /* ---------------------------------------------------------------- */ | |
82 | /* Routines */ | |
83 | /* ---------------------------------------------------------------- */ | |
84 | ||
85 | #include "decimal64Symbols.h" | |
86 | ||
87 | /* String conversions */ | |
88 | decimal64 * decimal64FromString(decimal64 *, const char *, decContext *); | |
89 | char * decimal64ToString(const decimal64 *, char *); | |
90 | char * decimal64ToEngString(const decimal64 *, char *); | |
91 | ||
92 | /* decNumber conversions */ | |
93 | decimal64 * decimal64FromNumber(decimal64 *, const decNumber *, | |
94 | decContext *); | |
95 | decNumber * decimal64ToNumber(const decimal64 *, decNumber *); | |
96 | ||
97 | /* Format-dependent utilities */ | |
98 | uint32_t decimal64IsCanonical(const decimal64 *); | |
99 | decimal64 * decimal64Canonical(decimal64 *, const decimal64 *); | |
100 | ||
101 | #endif |