| /* 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. |
| |
| In addition to the permissions in the GNU General Public License, |
| the Free Software Foundation gives you unlimited permission to link |
| the compiled version of this file into combinations with other |
| programs, and to distribute those combinations without any |
| restriction coming from the use of this file. (The General Public |
| License restrictions do apply in other respects; for example, they |
| cover modification of the file, and distribution when not linked |
| into a combine executable.) |
| |
| 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 |