195 lines
8.4 KiB
C
195 lines
8.4 KiB
C
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/* Decimal Number module header for the decNumber C Library
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Copyright (C) 2005 Free Software Foundation, Inc.
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Contributed by IBM Corporation. Author Mike Cowlishaw.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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In addition to the permissions in the GNU General Public License,
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the Free Software Foundation gives you unlimited permission to link
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the compiled version of this file into combinations with other
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programs, and to distribute those combinations without any
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restriction coming from the use of this file. (The General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into a combine executable.)
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#if !defined(DECNUMBER)
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#define DECNUMBER
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#define DECNAME "decNumber" /* Short name */
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#define DECVERSION "decNumber 3.24" /* Version [16 max.] */
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#define DECFULLNAME "Decimal Number Module" /* Verbose name */
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#define DECAUTHOR "Mike Cowlishaw" /* Who to blame */
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#if !defined(DECCONTEXT)
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#include "decContext.h"
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#endif
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/* Bit settings for decNumber.bits */
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#define DECNEG 0x80 /* Sign; 1=negative, 0=positive or zero */
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#define DECINF 0x40 /* 1=Infinity */
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#define DECNAN 0x20 /* 1=NaN */
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#define DECSNAN 0x10 /* 1=sNaN */
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/* The remaining bits are reserved; they must be 0 */
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#define DECSPECIAL (DECINF|DECNAN|DECSNAN) /* any special value */
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/* DECNUMDIGITS is the default number of digits we can hold in the */
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/* structure. If undefined, 1 is assumed and it is assumed that the */
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/* structure will be immediately followed by extra space (if */
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/* required). DECNUMDIGITS is always >0. */
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#if !defined(DECNUMDIGITS)
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#define DECNUMDIGITS 1
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#endif
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/* Define the decNumber data structure. The size and shape of the */
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/* units array in the structure is determined by the following */
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/* constant. This must not be changed without recompiling the */
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/* decNumber library modules. */
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#define DECDPUN 4 /* Decimal Digits Per UNit [must be in */
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/* range 1-9; power of 2 recommended]. */
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/* The size (integer data type) of each unit is determined by the */
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/* number of digits it will hold. */
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#if DECDPUN<=2
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#define decNumberUnit uint8_t
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#elif DECDPUN<=4
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#define decNumberUnit uint16_t
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#else
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#define decNumberUnit uint32_t
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#endif
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/* The number of decNumberUnits we need is ceiling of DECNUMDIGITS/DECDPUN */
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#define DECNUMUNITS ((DECNUMDIGITS+DECDPUN-1)/DECDPUN)
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/* The data structure... */
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typedef struct
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{
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int32_t digits; /* Count of digits in the coefficient; >0 */
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int32_t exponent; /* Unadjusted exponent, unbiased, in */
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/* range: -1999999997 through 999999999 */
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uint8_t bits; /* Indicator bits (see above) */
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decNumberUnit lsu[DECNUMUNITS]; /* Coefficient, from least significant unit */
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} decNumber;
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/* Notes: */
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/* 1. If digits is > DECDPUN then there will be more than one */
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/* decNumberUnits immediately following the first element of lsu. */
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/* These contain the remaining (more significant) digits of the */
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/* number, and may be in the lsu array, or may be guaranteed by */
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/* some other mechanism (such as being contained in another */
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/* structure, or being overlaid on dynamically allocated storage). */
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/* */
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/* Each integer of the coefficient (except the possibly the last) */
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/* contains DECDPUN digits (e.g., a value in the range 0 through */
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/* 99999999 if DECDPUN is 8, or 0 through 9999 if DECDPUN is 4). */
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/* */
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/* 2. A decNumber converted to a string may need up to digits+14 */
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/* characters. The worst cases (non-exponential and exponential */
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/* formats) are: -0.00000{9...}# */
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/* and: -9.{9...}E+999999999# (where # is '\0') */
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/* ------------------------------------------------------------------ */
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/* decNumber public functions and macros */
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/* ------------------------------------------------------------------ */
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#ifdef IN_LIBGCC2
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#define decNumberFromString __decNumberFromString
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#define decNumberToString __decNumberToString
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#define decNumberToEngString __decNumberToEngString
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#define decNumberAbs __decNumberAbs
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#define decNumberAdd __decNumberAdd
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#define decNumberCompare __decNumberCompare
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#define decNumberDivide __decNumberDivide
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#define decNumberDivideInteger __decNumberDivideInteger
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#define decNumberMax __decNumberMax
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#define decNumberMin __decNumberMin
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#define decNumberMinus __decNumberMinus
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#define decNumberMultiply __decNumberMultiply
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#define decNumberNormalize __decNumberNormalize
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#define decNumberPlus __decNumberPlus
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#define decNumberPower __decNumberPower
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#define decNumberQuantize __decNumberQuantize
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#define decNumberRemainder __decNumberRemainder
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#define decNumberRemainderNear __decNumberRemainderNear
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#define decNumberRescale __decNumberRescale
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#define decNumberSameQuantum __decNumberSameQuantum
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#define decNumberSquareRoot __decNumberSquareRoot
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#define decNumberSubtract __decNumberSubtract
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#define decNumberToIntegralValue __decNumberToIntegralValue
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#define decNumberCopy __decNumberCopy
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#define decNumberTrim __decNumberTrim
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#define decNumberVersion __decNumberVersion
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#define decNumberZero __decNumberZero
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#endif
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/* Conversions */
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decNumber *decNumberFromString (decNumber *, const char *, decContext *);
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char *decNumberToString (const decNumber *, char *);
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char *decNumberToEngString (const decNumber *, char *);
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/* Operators */
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decNumber *decNumberAbs (decNumber *, const decNumber *, decContext *);
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decNumber *decNumberAdd (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberCompare (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberDivide (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberDivideInteger (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberMax (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberMin (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberMinus (decNumber *, const decNumber *, decContext *);
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decNumber *decNumberMultiply (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberNormalize (decNumber *, const decNumber *, decContext *);
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decNumber *decNumberPlus (decNumber *, const decNumber *, decContext *);
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decNumber *decNumberPower (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberQuantize (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberRemainder (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberRemainderNear (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberRescale (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberSameQuantum (decNumber *, const decNumber *, const decNumber *);
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decNumber *decNumberSquareRoot (decNumber *, const decNumber *, decContext *);
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decNumber *decNumberSubtract (decNumber *, const decNumber *,
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const decNumber *, decContext *);
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decNumber *decNumberToIntegralValue (decNumber *, const decNumber *, decContext *);
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/* Utilities */
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decNumber *decNumberCopy (decNumber *, const decNumber *);
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decNumber *decNumberTrim (decNumber *);
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const char *decNumberVersion (void);
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decNumber *decNumberZero (decNumber *);
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/* Macros */
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#define decNumberIsZero(dn) (*(dn)->lsu==0 \
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&& (dn)->digits==1 \
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&& (((dn)->bits&DECSPECIAL)==0))
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#define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0)
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#define decNumberIsNaN(dn) (((dn)->bits&(DECNAN|DECSNAN))!=0)
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#define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0)
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#endif
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