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Diffstat (limited to 'libdecnumber/decNumber.h')
| -rw-r--r-- | libdecnumber/decNumber.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/libdecnumber/decNumber.h b/libdecnumber/decNumber.h new file mode 100644 index 00000000000..d7cf30f154e --- /dev/null +++ b/libdecnumber/decNumber.h @@ -0,0 +1,183 @@ +/* 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, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, 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 *, char *, decContext *); +char *decNumberToString (decNumber *, char *); +char *decNumberToEngString (decNumber *, char *); + + /* Operators */ +decNumber *decNumberAbs (decNumber *, decNumber *, decContext *); +decNumber *decNumberAdd (decNumber *, decNumber *, decNumber *, decContext *); +decNumber *decNumberCompare (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberDivide (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberDivideInteger (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberMax (decNumber *, decNumber *, decNumber *, decContext *); +decNumber *decNumberMin (decNumber *, decNumber *, decNumber *, decContext *); +decNumber *decNumberMinus (decNumber *, decNumber *, decContext *); +decNumber *decNumberMultiply (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberNormalize (decNumber *, decNumber *, decContext *); +decNumber *decNumberPlus (decNumber *, decNumber *, decContext *); +decNumber *decNumberPower (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberQuantize (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberRemainder (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberRemainderNear (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberRescale (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberSameQuantum (decNumber *, decNumber *, decNumber *); +decNumber *decNumberSquareRoot (decNumber *, decNumber *, decContext *); +decNumber *decNumberSubtract (decNumber *, decNumber *, decNumber *, + decContext *); +decNumber *decNumberToIntegralValue (decNumber *, decNumber *, decContext *); + + /* Utilities */ +decNumber *decNumberCopy (decNumber *, 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) +#define decNumberNegate(dn) (((dn)->bits)^=DECNEG) + +#endif |