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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [libdecnumber/] [decNumber.h] - Rev 420
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/* Decimal number arithmetic module header for the decNumber C Library. Copyright (C) 2005, 2007, 2009 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 3, 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. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ /* ------------------------------------------------------------------ */ /* Decimal Number arithmetic module header */ /* ------------------------------------------------------------------ */ #if !defined(DECNUMBER) #define DECNUMBER #define DECNAME "decNumber" /* Short name */ #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 */ /* 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 3 /* DECimal Digits Per UNit [must be >0 */ /* and <10; 3 or powers of 2 are best]. */ /* DECNUMDIGITS is the default number of digits that can be held in */ /* the structure. If undefined, 1 is assumed and it is assumed */ /* that the structure will be immediately followed by extra space, */ /* as required. DECNUMDIGITS is always >0. */ #if !defined(DECNUMDIGITS) #define DECNUMDIGITS 1 #endif /* 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 units needed is ceil(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) */ /* Coefficient, from least significant unit */ decNumberUnit lsu[DECNUMUNITS]; } decNumber; /* Notes: */ /* 1. If digits is > DECDPUN then there will one or more */ /* 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 potentially the last) */ /* contains DECDPUN digits (e.g., a value in the range 0 through */ /* 99999999 if DECDPUN is 8, or 0 through 999 if DECDPUN is 3). */ /* */ /* 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 */ /* ---------------------------------------------------------------- */ #include "decNumberSymbols.h" #ifdef __cplusplus extern "C" { #endif /* Conversions */ decNumber * decNumberFromInt32(decNumber *, int32_t); decNumber * decNumberFromUInt32(decNumber *, uint32_t); decNumber * decNumberFromString(decNumber *, const char *, decContext *); char * decNumberToString(const decNumber *, char *); char * decNumberToEngString(const decNumber *, char *); uint32_t decNumberToUInt32(const decNumber *, decContext *); int32_t decNumberToInt32(const decNumber *, decContext *); uint8_t * decNumberGetBCD(const decNumber *, uint8_t *); decNumber * decNumberSetBCD(decNumber *, const uint8_t *, uint32_t); /* Operators and elementary functions */ decNumber * decNumberAbs(decNumber *, const decNumber *, decContext *); decNumber * decNumberAdd(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberAnd(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberCompare(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberCompareSignal(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberCompareTotal(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberCompareTotalMag(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberDivide(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberDivideInteger(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberExp(decNumber *, const decNumber *, decContext *); decNumber * decNumberFMA(decNumber *, const decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberInvert(decNumber *, const decNumber *, decContext *); decNumber * decNumberLn(decNumber *, const decNumber *, decContext *); decNumber * decNumberLogB(decNumber *, const decNumber *, decContext *); decNumber * decNumberLog10(decNumber *, const decNumber *, decContext *); decNumber * decNumberMax(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberMaxMag(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberMin(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberMinMag(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 * decNumberOr(decNumber *, const 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 * decNumberReduce(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 * decNumberRotate(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberSameQuantum(decNumber *, const decNumber *, const decNumber *); decNumber * decNumberScaleB(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberShift(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberSquareRoot(decNumber *, const decNumber *, decContext *); decNumber * decNumberSubtract(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberToIntegralExact(decNumber *, const decNumber *, decContext *); decNumber * decNumberToIntegralValue(decNumber *, const decNumber *, decContext *); decNumber * decNumberXor(decNumber *, const decNumber *, const decNumber *, decContext *); /* Utilities */ enum decClass decNumberClass(const decNumber *, decContext *); const char * decNumberClassToString(enum decClass); decNumber * decNumberCopy(decNumber *, const decNumber *); decNumber * decNumberCopyAbs(decNumber *, const decNumber *); decNumber * decNumberCopyNegate(decNumber *, const decNumber *); decNumber * decNumberCopySign(decNumber *, const decNumber *, const decNumber *); decNumber * decNumberNextMinus(decNumber *, const decNumber *, decContext *); decNumber * decNumberNextPlus(decNumber *, const decNumber *, decContext *); decNumber * decNumberNextToward(decNumber *, const decNumber *, const decNumber *, decContext *); decNumber * decNumberTrim(decNumber *); const char * decNumberVersion(void); decNumber * decNumberZero(decNumber *); /* Functions for testing decNumbers (normality depends on context) */ int32_t decNumberIsNormal(const decNumber *, decContext *); int32_t decNumberIsSubnormal(const decNumber *, decContext *); /* Macros for testing decNumber *dn */ #define decNumberIsCanonical(dn) (1) /* All decNumbers are saintly */ #define decNumberIsFinite(dn) (((dn)->bits&DECSPECIAL)==0) #define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0) #define decNumberIsNaN(dn) (((dn)->bits&(DECNAN|DECSNAN))!=0) #define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0) #define decNumberIsQNaN(dn) (((dn)->bits&(DECNAN))!=0) #define decNumberIsSNaN(dn) (((dn)->bits&(DECSNAN))!=0) #define decNumberIsSpecial(dn) (((dn)->bits&DECSPECIAL)!=0) #define decNumberIsZero(dn) (*(dn)->lsu==0 \ && (dn)->digits==1 \ && (((dn)->bits&DECSPECIAL)==0)) #define decNumberRadix(dn) (10) #ifdef __cplusplus } #endif #endif
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