102 lines
4.1 KiB
C
102 lines
4.1 KiB
C
|
/* Decimal 64-bit format module header for the decNumber C Library.
|
||
|
|
Copyright (C) 2005, 2007 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 2, or (at your option) any later
|
||
|
|
version.
|
||
|
|
|
||
|
|
In addition to the permissions in the GNU General Public License,
|
||
|
|
the Free Software Foundation gives you unlimited permission to link
|
||
|
|
the compiled version of this file into combinations with other
|
||
|
|
programs, and to distribute those combinations without any
|
||
|
|
restriction coming from the use of this file. (The General Public
|
||
|
|
License restrictions do apply in other respects; for example, they
|
||
|
|
cover modification of the file, and distribution when not linked
|
||
|
|
into a combine executable.)
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with GCC; see the file COPYING. If not, write to the Free
|
||
|
|
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
|
||
|
|
02110-1301, USA. */
|
||
|
|
|
||
|
|
/* ------------------------------------------------------------------ */
|
||
|
|
/* 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"
|
||
|
|
|
||
|
|
/* 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 *);
|
||
|
|
|
||
|
|
#endif
|