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gcc/libdecnumber/decNumber.h

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/* Decimal Number module header for the decNumber C Library
Copyright (C) 2005 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.
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. */
#if !defined(DECNUMBER)
#define DECNUMBER
#define DECNAME "decNumber" /* Short name */
#define DECVERSION "decNumber 3.24" /* Version [16 max.] */
#define DECFULLNAME "Decimal Number Module" /* Verbose name */
#define DECAUTHOR "Mike Cowlishaw" /* Who to blame */
#if !defined(DECCONTEXT)
#include "decContext.h"
#endif
/* Bit settings for decNumber.bits */
#define DECNEG 0x80 /* Sign; 1=negative, 0=positive or zero */
#define DECINF 0x40 /* 1=Infinity */
#define DECNAN 0x20 /* 1=NaN */
#define DECSNAN 0x10 /* 1=sNaN */
/* The remaining bits are reserved; they must be 0 */
#define DECSPECIAL (DECINF|DECNAN|DECSNAN) /* any special value */
/* DECNUMDIGITS is the default number of digits we can hold in the */
/* structure. If undefined, 1 is assumed and it is assumed that the */
/* structure will be immediately followed by extra space (if */
/* required). DECNUMDIGITS is always >0. */
#if !defined(DECNUMDIGITS)
#define DECNUMDIGITS 1
#endif
/* Define the decNumber data structure. The size and shape of the */
/* units array in the structure is determined by the following */
/* constant. This must not be changed without recompiling the */
/* decNumber library modules. */
#define DECDPUN 4 /* Decimal Digits Per UNit [must be in */
/* range 1-9; power of 2 recommended]. */
/* The size (integer data type) of each unit is determined by the */
/* number of digits it will hold. */
#if DECDPUN<=2
#define decNumberUnit uint8_t
#elif DECDPUN<=4
#define decNumberUnit uint16_t
#else
#define decNumberUnit uint32_t
#endif
/* The number of decNumberUnits we need is ceiling of DECNUMDIGITS/DECDPUN */
#define DECNUMUNITS ((DECNUMDIGITS+DECDPUN-1)/DECDPUN)
/* The data structure... */
typedef struct
{
int32_t digits; /* Count of digits in the coefficient; >0 */
int32_t exponent; /* Unadjusted exponent, unbiased, in */
/* range: -1999999997 through 999999999 */
uint8_t bits; /* Indicator bits (see above) */
decNumberUnit lsu[DECNUMUNITS]; /* Coefficient, from least significant unit */
} decNumber;
/* Notes: */
/* 1. If digits is > DECDPUN then there will be more than one */
/* decNumberUnits immediately following the first element of lsu. */
/* These contain the remaining (more significant) digits of the */
/* number, and may be in the lsu array, or may be guaranteed by */
/* some other mechanism (such as being contained in another */
/* structure, or being overlaid on dynamically allocated storage). */
/* */
/* Each integer of the coefficient (except the possibly the last) */
/* contains DECDPUN digits (e.g., a value in the range 0 through */
/* 99999999 if DECDPUN is 8, or 0 through 9999 if DECDPUN is 4). */
/* */
/* 2. A decNumber converted to a string may need up to digits+14 */
/* characters. The worst cases (non-exponential and exponential */
/* formats) are: -0.00000{9...}# */
/* and: -9.{9...}E+999999999# (where # is '\0') */
/* ------------------------------------------------------------------ */
/* decNumber public functions and macros */
/* ------------------------------------------------------------------ */
#ifdef IN_LIBGCC2
#define decNumberFromString __decNumberFromString
#define decNumberToString __decNumberToString
#define decNumberToEngString __decNumberToEngString
#define decNumberAbs __decNumberAbs
#define decNumberAdd __decNumberAdd
#define decNumberCompare __decNumberCompare
#define decNumberDivide __decNumberDivide
#define decNumberDivideInteger __decNumberDivideInteger
#define decNumberMax __decNumberMax
#define decNumberMin __decNumberMin
#define decNumberMinus __decNumberMinus
#define decNumberMultiply __decNumberMultiply
#define decNumberNormalize __decNumberNormalize
#define decNumberPlus __decNumberPlus
#define decNumberPower __decNumberPower
#define decNumberQuantize __decNumberQuantize
#define decNumberRemainder __decNumberRemainder
#define decNumberRemainderNear __decNumberRemainderNear
#define decNumberRescale __decNumberRescale
#define decNumberSameQuantum __decNumberSameQuantum
#define decNumberSquareRoot __decNumberSquareRoot
#define decNumberSubtract __decNumberSubtract
#define decNumberToIntegralValue __decNumberToIntegralValue
#define decNumberCopy __decNumberCopy
#define decNumberTrim __decNumberTrim
#define decNumberVersion __decNumberVersion
#define decNumberZero __decNumberZero
#endif
/* Conversions */
decNumber *decNumberFromString (decNumber *, const char *, decContext *);
char *decNumberToString (const decNumber *, char *);
char *decNumberToEngString (const decNumber *, char *);
/* Operators */
decNumber *decNumberAbs (decNumber *, const decNumber *, decContext *);
decNumber *decNumberAdd (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberCompare (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberDivide (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberDivideInteger (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberMax (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberMin (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberMinus (decNumber *, const decNumber *, decContext *);
decNumber *decNumberMultiply (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberNormalize (decNumber *, const decNumber *, decContext *);
decNumber *decNumberPlus (decNumber *, const decNumber *, decContext *);
decNumber *decNumberPower (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberQuantize (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberRemainder (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberRemainderNear (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberRescale (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberSameQuantum (decNumber *, const decNumber *, const decNumber *);
decNumber *decNumberSquareRoot (decNumber *, const decNumber *, decContext *);
decNumber *decNumberSubtract (decNumber *, const decNumber *,
const decNumber *, decContext *);
decNumber *decNumberToIntegralValue (decNumber *, const decNumber *, decContext *);
/* Utilities */
decNumber *decNumberCopy (decNumber *, const decNumber *);
decNumber *decNumberTrim (decNumber *);
const char *decNumberVersion (void);
decNumber *decNumberZero (decNumber *);
/* Macros */
#define decNumberIsZero(dn) (*(dn)->lsu==0 \
&& (dn)->digits==1 \
&& (((dn)->bits&DECSPECIAL)==0))
#define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0)
#define decNumberIsNaN(dn) (((dn)->bits&(DECNAN|DECSNAN))!=0)
#define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0)
#endif
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