[apple/icu.git] / icuSources / i18n / decNumber.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/* ------------------------------------------------------------------ */
/* Decimal Number arithmetic module header                            */
/* ------------------------------------------------------------------ */
/* Copyright (c) IBM Corporation, 2000-2010.   All rights reserved.   */
/*                                                                    */
/* This software is made available under the terms of the             */
/* ICU License -- ICU 1.8.1 and later.                                */
/*                                                                    */
/* The description and User's Guide ("The decNumber C Library") for   */
/* this software is called decNumber.pdf.  This document is           */
/* available, together with arithmetic and format specifications,     */
/* testcases, and Web links, on the General Decimal Arithmetic page.  */
/*                                                                    */
/* Please send comments, suggestions, and corrections to the author:  */
/*   mfc@uk.ibm.com                                                   */
/*   Mike Cowlishaw, IBM Fellow                                       */
/*   IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK         */
/* ------------------------------------------------------------------ */

/* Modified version, for use from within ICU.
 *    Renamed public functions, to avoid an unwanted export of the 
 *    standard names from the ICU library.
 *
 *    Use ICU's uprv_malloc() and uprv_free()
 *
 *    Revert comment syntax to plain C
 *
 *    Remove a few compiler warnings.
 */

#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. */

  /* For ICU, use one digit per byte, to make it easier to emulate the
   * old DigitList interface on top of a decNumber
   */
  #define DECDPUN 1           /* 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                            */
  /* ---------------------------------------------------------------- */
  /* Conversions                                                      */
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromInt32(decNumber *, int32_t);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromUInt32(decNumber *, uint32_t);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromString(decNumber *, const char *, decContext *);
  U_INTERNAL char      * U_EXPORT2 uprv_decNumberToString(const decNumber *, char *);
  U_INTERNAL char      * U_EXPORT2 uprv_decNumberToEngString(const decNumber *, char *);
  U_INTERNAL uint32_t    U_EXPORT2 uprv_decNumberToUInt32(const decNumber *, decContext *);
  U_INTERNAL int32_t     U_EXPORT2 uprv_decNumberToInt32(const decNumber *, decContext *);
  U_INTERNAL uint8_t   * U_EXPORT2 uprv_decNumberGetBCD(const decNumber *, uint8_t *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSetBCD(decNumber *, const uint8_t *, uint32_t);

  /* Operators and elementary functions                               */
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAbs(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAdd(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAnd(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompare(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareSignal(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareTotal(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareTotalMag(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberDivide(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberDivideInteger(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberExp(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFMA(decNumber *, const decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberInvert(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLn(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLogB(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLog10(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMax(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMaxMag(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMin(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMinMag(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMinus(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMultiply(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNormalize(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberOr(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberPlus(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberPower(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberQuantize(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberReduce(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRemainder(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRemainderNear(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRescale(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRotate(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSameQuantum(decNumber *, const decNumber *, const decNumber *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberScaleB(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberShift(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSquareRoot(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSubtract(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberToIntegralExact(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberToIntegralValue(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberXor(decNumber *, const decNumber *, const decNumber *, decContext *);

  /* Utilities                                                        */
  enum decClass uprv_decNumberClass(const decNumber *, decContext *);
  U_INTERNAL const char * U_EXPORT2 uprv_decNumberClassToString(enum decClass);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberCopy(decNumber *, const decNumber *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberCopyAbs(decNumber *, const decNumber *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberCopyNegate(decNumber *, const decNumber *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberCopySign(decNumber *, const decNumber *, const decNumber *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberNextMinus(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberNextPlus(decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberNextToward(decNumber *, const decNumber *, const decNumber *, decContext *);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberTrim(decNumber *);
  U_INTERNAL const char * U_EXPORT2 uprv_decNumberVersion(void);
  U_INTERNAL decNumber  * U_EXPORT2 uprv_decNumberZero(decNumber *);

  /* Functions for testing decNumbers (normality depends on context)  */
  U_INTERNAL int32_t U_EXPORT2 uprv_decNumberIsNormal(const decNumber *, decContext *);
  U_INTERNAL int32_t U_EXPORT2 uprv_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)

#endif
Commit	Line	Data
f3c0d7a5 A	1	// © 2016 and later: Unicode, Inc. and others.
f3c0d7a5 A	2	// License & terms of use: http://www.unicode.org/copyright.html
729e4ab9 A	3	/* ------------------------------------------------------------------ */
	4	/* Decimal Number arithmetic module header */
	5	/* ------------------------------------------------------------------ */
	6	/* Copyright (c) IBM Corporation, 2000-2010. All rights reserved. */
	7	/* */
	8	/* This software is made available under the terms of the */
	9	/* ICU License -- ICU 1.8.1 and later. */
	10	/* */
	11	/* The description and User's Guide ("The decNumber C Library") for */
	12	/* this software is called decNumber.pdf. This document is */
	13	/* available, together with arithmetic and format specifications, */
	14	/* testcases, and Web links, on the General Decimal Arithmetic page. */
	15	/* */
	16	/* Please send comments, suggestions, and corrections to the author: */
	17	/* mfc@uk.ibm.com */
	18	/* Mike Cowlishaw, IBM Fellow */
	19	/* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */
	20	/* ------------------------------------------------------------------ */
	21
	22	/* Modified version, for use from within ICU.
	23	* Renamed public functions, to avoid an unwanted export of the
	24	* standard names from the ICU library.
	25	*
	26	* Use ICU's uprv_malloc() and uprv_free()
	27	*
	28	* Revert comment syntax to plain C
	29	*
	30	* Remove a few compiler warnings.
	31	*/
	32
	33	#if !defined(DECNUMBER)
	34	#define DECNUMBER
	35	#define DECNAME "decNumber" /* Short name */
	36	#define DECFULLNAME "Decimal Number Module" /* Verbose name */
	37	#define DECAUTHOR "Mike Cowlishaw" /* Who to blame */
	38
	39	#if !defined(DECCONTEXT)
	40	#include "decContext.h"
	41	#endif
	42
	43	/* Bit settings for decNumber.bits */
	44	#define DECNEG 0x80 /* Sign; 1=negative, 0=positive or zero */
	45	#define DECINF 0x40 /* 1=Infinity */
	46	#define DECNAN 0x20 /* 1=NaN */
	47	#define DECSNAN 0x10 /* 1=sNaN */
	48	/* The remaining bits are reserved; they must be 0 */
	49	#define DECSPECIAL (DECINF\|DECNAN\|DECSNAN) /* any special value */
	50
	51	/* Define the decNumber data structure. The size and shape of the */
	52	/* units array in the structure is determined by the following */
	53	/* constant. This must not be changed without recompiling the */
	54	/* decNumber library modules. */
	55
	56	/* For ICU, use one digit per byte, to make it easier to emulate the
	57	* old DigitList interface on top of a decNumber
	58	*/
	59	#define DECDPUN 1 /* DECimal Digits Per UNit [must be >0 */
	60	/* and <10; 3 or powers of 2 are best]. */
	61
	62	/* DECNUMDIGITS is the default number of digits that can be held in */
	63	/* the structure. If undefined, 1 is assumed and it is assumed */
	64	/* that the structure will be immediately followed by extra space, */
	65	/* as required. DECNUMDIGITS is always >0. */
	66	#if !defined(DECNUMDIGITS)
67	#define DECNUMDIGITS 1
68	#endif
69
70	/* The size (integer data type) of each unit is determined by the */
71	/* number of digits it will hold. */
72	#if DECDPUN<=2
73	#define decNumberUnit uint8_t
74	#elif DECDPUN<=4
75	#define decNumberUnit uint16_t
76	#else
77	#define decNumberUnit uint32_t
78	#endif
79	/* The number of units needed is ceil(DECNUMDIGITS/DECDPUN) */
80	#define DECNUMUNITS ((DECNUMDIGITS+DECDPUN-1)/DECDPUN)
81
82	/* The data structure... */
83	typedef struct {
84	int32_t digits; /* Count of digits in the coefficient; >0 */
85	int32_t exponent; /* Unadjusted exponent, unbiased, in */
86	/* range: -1999999997 through 999999999 */
87	uint8_t bits; /* Indicator bits (see above) */
88	/* Coefficient, from least significant unit */
89	decNumberUnit lsu[DECNUMUNITS];
90	} decNumber;
91
92	/* Notes: */
93	/* 1. If digits is > DECDPUN then there will one or more */
94	/* decNumberUnits immediately following the first element of lsu.*/
95	/* These contain the remaining (more significant) digits of the */
96	/* number, and may be in the lsu array, or may be guaranteed by */
97	/* some other mechanism (such as being contained in another */
98	/* structure, or being overlaid on dynamically allocated */
99	/* storage). */
100	/* */
101	/* Each integer of the coefficient (except potentially the last) */
102	/* contains DECDPUN digits (e.g., a value in the range 0 through */
103	/* 99999999 if DECDPUN is 8, or 0 through 999 if DECDPUN is 3). */
104	/* */
105	/* 2. A decNumber converted to a string may need up to digits+14 */
106	/* characters. The worst cases (non-exponential and exponential */
107	/* formats) are -0.00000{9...}# and -9.{9...}E+999999999# */
108	/* (where # is '\0') */
109
110
111	/* ---------------------------------------------------------------- */
112	/* decNumber public functions and macros */
113	/* ---------------------------------------------------------------- */
114	/* Conversions */
115	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromInt32(decNumber *, int32_t);
116	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromUInt32(decNumber *, uint32_t);
117	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromString(decNumber , const char , decContext *);
118	U_INTERNAL char * U_EXPORT2 uprv_decNumberToString(const decNumber , char );
119	U_INTERNAL char * U_EXPORT2 uprv_decNumberToEngString(const decNumber , char );
120	U_INTERNAL uint32_t U_EXPORT2 uprv_decNumberToUInt32(const decNumber , decContext );
121	U_INTERNAL int32_t U_EXPORT2 uprv_decNumberToInt32(const decNumber , decContext );
122	U_INTERNAL uint8_t * U_EXPORT2 uprv_decNumberGetBCD(const decNumber , uint8_t );
123	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSetBCD(decNumber , const uint8_t , uint32_t);
124
125	/* Operators and elementary functions */
126	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAbs(decNumber , const decNumber , decContext *);
127	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAdd(decNumber , const decNumber , const decNumber , decContext );
128	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAnd(decNumber , const decNumber , const decNumber , decContext );
129	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompare(decNumber , const decNumber , const decNumber , decContext );
130	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareSignal(decNumber , const decNumber , const decNumber , decContext );
131	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareTotal(decNumber , const decNumber , const decNumber , decContext );
132	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareTotalMag(decNumber , const decNumber , const decNumber , decContext );
133	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberDivide(decNumber , const decNumber , const decNumber , decContext );
134	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberDivideInteger(decNumber , const decNumber , const decNumber , decContext );
135	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberExp(decNumber , const decNumber , decContext *);
136	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFMA(decNumber , const decNumber , const decNumber , const decNumber , decContext *);
137	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberInvert(decNumber , const decNumber , decContext *);
138	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLn(decNumber , const decNumber , decContext *);
139	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLogB(decNumber , const decNumber , decContext *);
140	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLog10(decNumber , const decNumber , decContext *);
141	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMax(decNumber , const decNumber , const decNumber , decContext );
142	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMaxMag(decNumber , const decNumber , const decNumber , decContext );
143	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMin(decNumber , const decNumber , const decNumber , decContext );
144	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMinMag(decNumber , const decNumber , const decNumber , decContext );
145	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMinus(decNumber , const decNumber , decContext *);
146	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMultiply(decNumber , const decNumber , const decNumber , decContext );
147	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNormalize(decNumber , const decNumber , decContext *);
148	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberOr(decNumber , const decNumber , const decNumber , decContext );
149	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberPlus(decNumber , const decNumber , decContext *);
150	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberPower(decNumber , const decNumber , const decNumber , decContext );
151	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberQuantize(decNumber , const decNumber , const decNumber , decContext );
152	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberReduce(decNumber , const decNumber , decContext *);
153	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRemainder(decNumber , const decNumber , const decNumber , decContext );
154	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRemainderNear(decNumber , const decNumber , const decNumber , decContext );
155	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRescale(decNumber , const decNumber , const decNumber , decContext );
156	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRotate(decNumber , const decNumber , const decNumber , decContext );
157	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSameQuantum(decNumber , const decNumber , const decNumber *);
158	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberScaleB(decNumber , const decNumber , const decNumber , decContext );
159	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberShift(decNumber , const decNumber , const decNumber , decContext );
160	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSquareRoot(decNumber , const decNumber , decContext *);
161	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSubtract(decNumber , const decNumber , const decNumber , decContext );
162	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberToIntegralExact(decNumber , const decNumber , decContext *);
163	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberToIntegralValue(decNumber , const decNumber , decContext *);
164	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberXor(decNumber , const decNumber , const decNumber , decContext );
165
166	/* Utilities */
167	enum decClass uprv_decNumberClass(const decNumber , decContext );
168	U_INTERNAL const char * U_EXPORT2 uprv_decNumberClassToString(enum decClass);
169	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopy(decNumber , const decNumber );
170	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopyAbs(decNumber , const decNumber );
171	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopyNegate(decNumber , const decNumber );
172	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopySign(decNumber , const decNumber , const decNumber *);
173	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNextMinus(decNumber , const decNumber , decContext *);
174	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNextPlus(decNumber , const decNumber , decContext *);
175	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNextToward(decNumber , const decNumber , const decNumber , decContext );
176	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberTrim(decNumber *);
177	U_INTERNAL const char * U_EXPORT2 uprv_decNumberVersion(void);
178	U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberZero(decNumber *);
179
180	/* Functions for testing decNumbers (normality depends on context) */
181	U_INTERNAL int32_t U_EXPORT2 uprv_decNumberIsNormal(const decNumber , decContext );
182	U_INTERNAL int32_t U_EXPORT2 uprv_decNumberIsSubnormal(const decNumber , decContext );
183
184	/* Macros for testing decNumber dn /
185	#define decNumberIsCanonical(dn) (1) /* All decNumbers are saintly */
186	#define decNumberIsFinite(dn) (((dn)->bits&DECSPECIAL)==0)
187	#define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0)
188	#define decNumberIsNaN(dn) (((dn)->bits&(DECNAN\|DECSNAN))!=0)
189	#define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0)
190	#define decNumberIsQNaN(dn) (((dn)->bits&(DECNAN))!=0)
191	#define decNumberIsSNaN(dn) (((dn)->bits&(DECSNAN))!=0)
192	#define decNumberIsSpecial(dn) (((dn)->bits&DECSPECIAL)!=0)
193	#define decNumberIsZero(dn) (*(dn)->lsu==0 \
194	&& (dn)->digits==1 \
195	&& (((dn)->bits&DECSPECIAL)==0))
196	#define decNumberRadix(dn) (10)
197
198	#endif