| /* Decimal 64-bit format module header for the decNumber C Library. |
| Copyright (C) 2005-2022 Free Software Foundation, Inc. |
| Contributed by IBM Corporation. Author Mike Cowlishaw. |
| |
| 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/>. */ |
| |
| /* ------------------------------------------------------------------ */ |
| /* Decimal 64-bit format module header */ |
| /* ------------------------------------------------------------------ */ |
| |
| #if !defined(DECIMAL64) |
| #define DECIMAL64 |
| #define DEC64NAME "decimal64" /* Short name */ |
| #define DEC64FULLNAME "Decimal 64-bit Number" /* Verbose name */ |
| #define DEC64AUTHOR "Mike Cowlishaw" /* Who to blame */ |
| |
| |
| /* parameters for decimal64s */ |
| #define DECIMAL64_Bytes 8 /* length */ |
| #define DECIMAL64_Pmax 16 /* maximum precision (digits) */ |
| #define DECIMAL64_Emax 384 /* maximum adjusted exponent */ |
| #define DECIMAL64_Emin -383 /* minimum adjusted exponent */ |
| #define DECIMAL64_Bias 398 /* bias for the exponent */ |
| #define DECIMAL64_String 24 /* maximum string length, +1 */ |
| #define DECIMAL64_EconL 8 /* exp. continuation length */ |
| /* highest biased exponent (Elimit-1) */ |
| #define DECIMAL64_Ehigh (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1) |
| |
| /* check enough digits, if pre-defined */ |
| #if defined(DECNUMDIGITS) |
| #if (DECNUMDIGITS<DECIMAL64_Pmax) |
| #error decimal64.h needs pre-defined DECNUMDIGITS>=16 for safe use |
| #endif |
| #endif |
| |
| |
| #ifndef DECNUMDIGITS |
| #define DECNUMDIGITS DECIMAL64_Pmax /* size if not already defined*/ |
| #endif |
| #ifndef DECNUMBER |
| #include "decNumber.h" /* context and number library */ |
| #endif |
| |
| /* Decimal 64-bit type, accessible by bytes */ |
| typedef struct { |
| uint8_t bytes[DECIMAL64_Bytes]; /* decimal64: 1, 5, 8, 50 bits*/ |
| } decimal64; |
| |
| /* special values [top byte excluding sign bit; last two bits are */ |
| /* don't-care for Infinity on input, last bit don't-care for NaN] */ |
| #if !defined(DECIMAL_NaN) |
| #define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */ |
| #define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */ |
| #define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */ |
| #endif |
| |
| /* ---------------------------------------------------------------- */ |
| /* Routines */ |
| /* ---------------------------------------------------------------- */ |
| |
| #include "decimal64Symbols.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* String conversions */ |
| decimal64 * decimal64FromString(decimal64 *, const char *, decContext *); |
| char * decimal64ToString(const decimal64 *, char *); |
| char * decimal64ToEngString(const decimal64 *, char *); |
| |
| /* decNumber conversions */ |
| decimal64 * decimal64FromNumber(decimal64 *, const decNumber *, |
| decContext *); |
| decNumber * decimal64ToNumber(const decimal64 *, decNumber *); |
| |
| /* Format-dependent utilities */ |
| uint32_t decimal64IsCanonical(const decimal64 *); |
| decimal64 * decimal64Canonical(decimal64 *, const decimal64 *); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |