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1 | /* Decimal 32-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 32-bit format module header */ | |
33 | /* ------------------------------------------------------------------ */ | |
34 | ||
35 | #if !defined(DECIMAL32) | |
36 | #define DECIMAL32 | |
37 | #define DEC32NAME "decimal32" /* Short name */ | |
38 | #define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */ | |
39 | #define DEC32AUTHOR "Mike Cowlishaw" /* Who to blame */ | |
40 | ||
41 | /* parameters for decimal32s */ | |
42 | #define DECIMAL32_Bytes 4 /* length */ | |
43 | #define DECIMAL32_Pmax 7 /* maximum precision (digits) */ | |
44 | #define DECIMAL32_Emax 96 /* maximum adjusted exponent */ | |
45 | #define DECIMAL32_Emin -95 /* minimum adjusted exponent */ | |
46 | #define DECIMAL32_Bias 101 /* bias for the exponent */ | |
47 | #define DECIMAL32_String 15 /* maximum string length, +1 */ | |
48 | #define DECIMAL32_EconL 6 /* exp. continuation length */ | |
49 | /* highest biased exponent (Elimit-1) */ | |
50 | #define DECIMAL32_Ehigh (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1) | |
51 | ||
52 | /* check enough digits, if pre-defined */ | |
53 | #if defined(DECNUMDIGITS) | |
54 | #if (DECNUMDIGITS<DECIMAL32_Pmax) | |
55 | #error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use | |
56 | #endif | |
57 | #endif | |
58 | ||
59 | #ifndef DECNUMDIGITS | |
60 | #define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/ | |
61 | #endif | |
62 | #ifndef DECNUMBER | |
63 | #include "decNumber.h" /* context and number library */ | |
64 | #endif | |
65 | ||
66 | /* Decimal 32-bit type, accessible by bytes */ | |
67 | typedef struct { | |
68 | uint8_t bytes[DECIMAL32_Bytes]; /* decimal32: 1, 5, 6, 20 bits*/ | |
69 | } decimal32; | |
70 | ||
71 | /* special values [top byte excluding sign bit; last two bits are */ | |
72 | /* don't-care for Infinity on input, last bit don't-care for NaN] */ | |
73 | #if !defined(DECIMAL_NaN) | |
74 | #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ | |
75 | #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ | |
76 | #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ | |
77 | #endif | |
78 | ||
79 | /* ---------------------------------------------------------------- */ | |
80 | /* Routines */ | |
81 | /* ---------------------------------------------------------------- */ | |
82 | ||
83 | #include "decimal32Symbols.h" | |
84 | ||
85 | /* String conversions */ | |
86 | decimal32 * decimal32FromString(decimal32 *, const char *, decContext *); | |
87 | char * decimal32ToString(const decimal32 *, char *); | |
88 | char * decimal32ToEngString(const decimal32 *, char *); | |
89 | ||
90 | /* decNumber conversions */ | |
91 | decimal32 * decimal32FromNumber(decimal32 *, const decNumber *, | |
92 | decContext *); | |
93 | decNumber * decimal32ToNumber(const decimal32 *, decNumber *); | |
94 | ||
95 | /* Format-dependent utilities */ | |
96 | uint32_t decimal32IsCanonical(const decimal32 *); | |
97 | decimal32 * decimal32Canonical(decimal32 *, const decimal32 *); | |
98 | ||
99 | #endif |