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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libdecnumber/] [decNumber.h] - Blame information for rev 284

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1 271 jeremybenn 
/* Decimal number arithmetic module header for the decNumber C Library.
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   Copyright (C) 2005, 2007, 2009 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 3, or (at your option) any later
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   version.
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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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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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<http://www.gnu.org/licenses/>.  */
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/* ------------------------------------------------------------------ */
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/* Decimal Number arithmetic module header                            */
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/* ------------------------------------------------------------------ */
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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 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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  /* 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 3           /* DECimal Digits Per UNit [must be >0  */
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                              /* and <10; 3 or powers of 2 are best]. */
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  /* DECNUMDIGITS is the default number of digits that can be held in */
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  /* the structure.  If undefined, 1 is assumed and it is assumed     */
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  /* that the structure will be immediately followed by extra space,  */
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  /* as 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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  /* 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 units needed is ceil(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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    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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                         /* Coefficient, from least significant unit  */
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    decNumberUnit lsu[DECNUMUNITS];
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    } decNumber;
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  /* Notes:                                                           */
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  /* 1. If digits is > DECDPUN then there will one or more            */
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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         */
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  /*    storage).                                                     */
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  /*                                                                  */
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  /*    Each integer of the coefficient (except potentially 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 999 if DECDPUN is 3).  */
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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...}# and -9.{9...}E+999999999#        */
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  /*    (where # is '\0')                                             */
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  /* ---------------------------------------------------------------- */
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  /* decNumber public functions and macros                            */
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  /* ---------------------------------------------------------------- */
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  #include "decNumberSymbols.h"
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  #ifdef __cplusplus
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  extern "C" {
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  #endif
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  /* Conversions                                                      */
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  decNumber * decNumberFromInt32(decNumber *, int32_t);
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  decNumber * decNumberFromUInt32(decNumber *, uint32_t);
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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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  uint32_t    decNumberToUInt32(const decNumber *, decContext *);
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  int32_t     decNumberToInt32(const decNumber *, decContext *);
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  uint8_t   * decNumberGetBCD(const decNumber *, uint8_t *);
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  decNumber * decNumberSetBCD(decNumber *, const uint8_t *, uint32_t);
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  /* Operators and elementary functions                               */
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  decNumber * decNumberAbs(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberAdd(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberAnd(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberCompare(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberCompareSignal(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberCompareTotal(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberCompareTotalMag(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberDivide(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberDivideInteger(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberExp(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberFMA(decNumber *, const decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberInvert(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberLn(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberLogB(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberLog10(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberMax(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberMaxMag(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberMin(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberMinMag(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberMinus(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberMultiply(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberNormalize(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberOr(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberPlus(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberPower(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberQuantize(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberReduce(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberRemainder(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberRemainderNear(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberRescale(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberRotate(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberSameQuantum(decNumber *, const decNumber *, const decNumber *);
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  decNumber * decNumberScaleB(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberShift(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberSquareRoot(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberSubtract(decNumber *, const decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberToIntegralExact(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberToIntegralValue(decNumber *, const decNumber *, decContext *);
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  decNumber * decNumberXor(decNumber *, const decNumber *, const decNumber *, decContext *);
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  /* Utilities                                                        */
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  enum decClass decNumberClass(const decNumber *, decContext *);
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  const char * decNumberClassToString(enum decClass);
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  decNumber  * decNumberCopy(decNumber *, const decNumber *);
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  decNumber  * decNumberCopyAbs(decNumber *, const decNumber *);
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  decNumber  * decNumberCopyNegate(decNumber *, const decNumber *);
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  decNumber  * decNumberCopySign(decNumber *, const decNumber *, const decNumber *);
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  decNumber  * decNumberNextMinus(decNumber *, const decNumber *, decContext *);
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  decNumber  * decNumberNextPlus(decNumber *, const decNumber *, decContext *);
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  decNumber  * decNumberNextToward(decNumber *, const decNumber *, const decNumber *, decContext *);
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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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  /* Functions for testing decNumbers (normality depends on context)  */
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  int32_t decNumberIsNormal(const decNumber *, decContext *);
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  int32_t decNumberIsSubnormal(const decNumber *, decContext *);
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  /* Macros for testing decNumber *dn                                 */
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  #define decNumberIsCanonical(dn) (1)  /* All decNumbers are saintly */
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  #define decNumberIsFinite(dn)    (((dn)->bits&DECSPECIAL)==0)
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  #define decNumberIsInfinite(dn)  (((dn)->bits&DECINF)!=0)
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  #define decNumberIsNaN(dn)       (((dn)->bits&(DECNAN|DECSNAN))!=0)
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  #define decNumberIsNegative(dn)  (((dn)->bits&DECNEG)!=0)
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  #define decNumberIsQNaN(dn)      (((dn)->bits&(DECNAN))!=0)
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  #define decNumberIsSNaN(dn)      (((dn)->bits&(DECSNAN))!=0)
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  #define decNumberIsSpecial(dn)   (((dn)->bits&DECSPECIAL)!=0)
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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 decNumberRadix(dn)       (10)
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  #ifdef __cplusplus
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  }
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  #endif
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#endif

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