/* ------------------------------------------------------------------ */ | |
/* Decimal 32-bit format module header */ | |
/* ------------------------------------------------------------------ */ | |
/* Copyright (c) IBM Corporation, 2000, 2006. All rights reserved. */ | |
/* */ | |
/* This software is made available under the terms of the */ | |
/* ICU License -- ICU 1.8.1 and later. */ | |
/* */ | |
/* The description and User's Guide ("The decNumber C Library") for */ | |
/* this software is called decNumber.pdf. This document is */ | |
/* available, together with arithmetic and format specifications, */ | |
/* testcases, and Web links, on the General Decimal Arithmetic page. */ | |
/* */ | |
/* Please send comments, suggestions, and corrections to the author: */ | |
/* mfc@uk.ibm.com */ | |
/* Mike Cowlishaw, IBM Fellow */ | |
/* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */ | |
/* ------------------------------------------------------------------ */ | |
#if !defined(DECIMAL32) | |
#define DECIMAL32 | |
#define DEC32NAME "decimal32" /* Short name */ | |
#define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */ | |
#define DEC32AUTHOR "Mike Cowlishaw" /* Who to blame */ | |
/* parameters for decimal32s */ | |
#define DECIMAL32_Bytes 4 /* length */ | |
#define DECIMAL32_Pmax 7 /* maximum precision (digits) */ | |
#define DECIMAL32_Emax 96 /* maximum adjusted exponent */ | |
#define DECIMAL32_Emin -95 /* minimum adjusted exponent */ | |
#define DECIMAL32_Bias 101 /* bias for the exponent */ | |
#define DECIMAL32_String 15 /* maximum string length, +1 */ | |
#define DECIMAL32_EconL 6 /* exp. continuation length */ | |
/* highest biased exponent (Elimit-1) */ | |
#define DECIMAL32_Ehigh (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1) | |
/* check enough digits, if pre-defined */ | |
#if defined(DECNUMDIGITS) | |
#if (DECNUMDIGITS<DECIMAL32_Pmax) | |
#error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use | |
#endif | |
#endif | |
#ifndef DECNUMDIGITS | |
#define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/ | |
#endif | |
#ifndef DECNUMBER | |
#include "decNumber.h" /* context and number library */ | |
#endif | |
/* Decimal 32-bit type, accessible by bytes */ | |
typedef struct { | |
uint8_t bytes[DECIMAL32_Bytes]; /* decimal32: 1, 5, 6, 20 bits*/ | |
} decimal32; | |
/* 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 */ | |
/* ---------------------------------------------------------------- */ | |
/* String conversions */ | |
decimal32 * decimal32FromString(decimal32 *, const char *, decContext *); | |
char * decimal32ToString(const decimal32 *, char *); | |
char * decimal32ToEngString(const decimal32 *, char *); | |
/* decNumber conversions */ | |
decimal32 * decimal32FromNumber(decimal32 *, const decNumber *, | |
decContext *); | |
decNumber * decimal32ToNumber(const decimal32 *, decNumber *); | |
/* Format-dependent utilities */ | |
uint32_t decimal32IsCanonical(const decimal32 *); | |
decimal32 * decimal32Canonical(decimal32 *, const decimal32 *); | |
#endif |