/* Decimal number arithmetic module header for the decNumber C Library.
  Copyright (C) 2005-2018 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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