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comparison: intl/icu/source/i18n/decNumber.h
intl/icu/source/i18n/decNumber.h
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| -1:000000000000 | 0:659bc1a87372 |
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| 1 /* ------------------------------------------------------------------ */ | |
| 2 /* Decimal Number arithmetic module header */ | |
| 3 /* ------------------------------------------------------------------ */ | |
| 4 /* Copyright (c) IBM Corporation, 2000-2010. All rights reserved. */ | |
| 5 /* */ | |
| 6 /* This software is made available under the terms of the */ | |
| 7 /* ICU License -- ICU 1.8.1 and later. */ | |
| 8 /* */ | |
| 9 /* The description and User's Guide ("The decNumber C Library") for */ | |
| 10 /* this software is called decNumber.pdf. This document is */ | |
| 11 /* available, together with arithmetic and format specifications, */ | |
| 12 /* testcases, and Web links, on the General Decimal Arithmetic page. */ | |
| 13 /* */ | |
| 14 /* Please send comments, suggestions, and corrections to the author: */ | |
| 15 /* mfc@uk.ibm.com */ | |
| 16 /* Mike Cowlishaw, IBM Fellow */ | |
| 17 /* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */ | |
| 18 /* ------------------------------------------------------------------ */ | |
| 19 | |
| 20 /* Modified version, for use from within ICU. | |
| 21 * Renamed public functions, to avoid an unwanted export of the | |
| 22 * standard names from the ICU library. | |
| 23 * | |
| 24 * Use ICU's uprv_malloc() and uprv_free() | |
| 25 * | |
| 26 * Revert comment syntax to plain C | |
| 27 * | |
| 28 * Remove a few compiler warnings. | |
| 29 */ | |
| 30 | |
| 31 #if !defined(DECNUMBER) | |
| 32 #define DECNUMBER | |
| 33 #define DECNAME "decNumber" /* Short name */ | |
| 34 #define DECFULLNAME "Decimal Number Module" /* Verbose name */ | |
| 35 #define DECAUTHOR "Mike Cowlishaw" /* Who to blame */ | |
| 36 | |
| 37 #if !defined(DECCONTEXT) | |
| 38 #include "decContext.h" | |
| 39 #endif | |
| 40 | |
| 41 /* Bit settings for decNumber.bits */ | |
| 42 #define DECNEG 0x80 /* Sign; 1=negative, 0=positive or zero */ | |
| 43 #define DECINF 0x40 /* 1=Infinity */ | |
| 44 #define DECNAN 0x20 /* 1=NaN */ | |
| 45 #define DECSNAN 0x10 /* 1=sNaN */ | |
| 46 /* The remaining bits are reserved; they must be 0 */ | |
| 47 #define DECSPECIAL (DECINF|DECNAN|DECSNAN) /* any special value */ | |
| 48 | |
| 49 /* Define the decNumber data structure. The size and shape of the */ | |
| 50 /* units array in the structure is determined by the following */ | |
| 51 /* constant. This must not be changed without recompiling the */ | |
| 52 /* decNumber library modules. */ | |
| 53 | |
| 54 /* For ICU, use one digit per byte, to make it easier to emulate the | |
| 55 * old DigitList interface on top of a decNumber | |
| 56 */ | |
| 57 #define DECDPUN 1 /* DECimal Digits Per UNit [must be >0 */ | |
| 58 /* and <10; 3 or powers of 2 are best]. */ | |
| 59 | |
| 60 /* DECNUMDIGITS is the default number of digits that can be held in */ | |
| 61 /* the structure. If undefined, 1 is assumed and it is assumed */ | |
| 62 /* that the structure will be immediately followed by extra space, */ | |
| 63 /* as required. DECNUMDIGITS is always >0. */ | |
| 64 #if !defined(DECNUMDIGITS) | |
| 65 #define DECNUMDIGITS 1 | |
| 66 #endif | |
| 67 | |
| 68 /* The size (integer data type) of each unit is determined by the */ | |
| 69 /* number of digits it will hold. */ | |
| 70 #if DECDPUN<=2 | |
| 71 #define decNumberUnit uint8_t | |
| 72 #elif DECDPUN<=4 | |
| 73 #define decNumberUnit uint16_t | |
| 74 #else | |
| 75 #define decNumberUnit uint32_t | |
| 76 #endif | |
| 77 /* The number of units needed is ceil(DECNUMDIGITS/DECDPUN) */ | |
| 78 #define DECNUMUNITS ((DECNUMDIGITS+DECDPUN-1)/DECDPUN) | |
| 79 | |
| 80 /* The data structure... */ | |
| 81 typedef struct { | |
| 82 int32_t digits; /* Count of digits in the coefficient; >0 */ | |
| 83 int32_t exponent; /* Unadjusted exponent, unbiased, in */ | |
| 84 /* range: -1999999997 through 999999999 */ | |
| 85 uint8_t bits; /* Indicator bits (see above) */ | |
| 86 /* Coefficient, from least significant unit */ | |
| 87 decNumberUnit lsu[DECNUMUNITS]; | |
| 88 } decNumber; | |
| 89 | |
| 90 /* Notes: */ | |
| 91 /* 1. If digits is > DECDPUN then there will one or more */ | |
| 92 /* decNumberUnits immediately following the first element of lsu.*/ | |
| 93 /* These contain the remaining (more significant) digits of the */ | |
| 94 /* number, and may be in the lsu array, or may be guaranteed by */ | |
| 95 /* some other mechanism (such as being contained in another */ | |
| 96 /* structure, or being overlaid on dynamically allocated */ | |
| 97 /* storage). */ | |
| 98 /* */ | |
| 99 /* Each integer of the coefficient (except potentially the last) */ | |
| 100 /* contains DECDPUN digits (e.g., a value in the range 0 through */ | |
| 101 /* 99999999 if DECDPUN is 8, or 0 through 999 if DECDPUN is 3). */ | |
| 102 /* */ | |
| 103 /* 2. A decNumber converted to a string may need up to digits+14 */ | |
| 104 /* characters. The worst cases (non-exponential and exponential */ | |
| 105 /* formats) are -0.00000{9...}# and -9.{9...}E+999999999# */ | |
| 106 /* (where # is '\0') */ | |
| 107 | |
| 108 | |
| 109 /* ---------------------------------------------------------------- */ | |
| 110 /* decNumber public functions and macros */ | |
| 111 /* ---------------------------------------------------------------- */ | |
| 112 /* Conversions */ | |
| 113 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromInt32(decNumber *, int32_t); | |
| 114 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromUInt32(decNumber *, uint32_t); | |
| 115 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFromString(decNumber *, const char *, decContext *); | |
| 116 U_INTERNAL char * U_EXPORT2 uprv_decNumberToString(const decNumber *, char *); | |
| 117 U_INTERNAL char * U_EXPORT2 uprv_decNumberToEngString(const decNumber *, char *); | |
| 118 U_INTERNAL uint32_t U_EXPORT2 uprv_decNumberToUInt32(const decNumber *, decContext *); | |
| 119 U_INTERNAL int32_t U_EXPORT2 uprv_decNumberToInt32(const decNumber *, decContext *); | |
| 120 U_INTERNAL uint8_t * U_EXPORT2 uprv_decNumberGetBCD(const decNumber *, uint8_t *); | |
| 121 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSetBCD(decNumber *, const uint8_t *, uint32_t); | |
| 122 | |
| 123 /* Operators and elementary functions */ | |
| 124 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAbs(decNumber *, const decNumber *, decContext *); | |
| 125 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAdd(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 126 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberAnd(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 127 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompare(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 128 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareSignal(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 129 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareTotal(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 130 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCompareTotalMag(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 131 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberDivide(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 132 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberDivideInteger(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 133 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberExp(decNumber *, const decNumber *, decContext *); | |
| 134 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberFMA(decNumber *, const decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 135 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberInvert(decNumber *, const decNumber *, decContext *); | |
| 136 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLn(decNumber *, const decNumber *, decContext *); | |
| 137 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLogB(decNumber *, const decNumber *, decContext *); | |
| 138 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberLog10(decNumber *, const decNumber *, decContext *); | |
| 139 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMax(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 140 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMaxMag(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 141 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMin(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 142 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMinMag(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 143 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMinus(decNumber *, const decNumber *, decContext *); | |
| 144 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberMultiply(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 145 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNormalize(decNumber *, const decNumber *, decContext *); | |
| 146 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberOr(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 147 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberPlus(decNumber *, const decNumber *, decContext *); | |
| 148 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberPower(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 149 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberQuantize(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 150 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberReduce(decNumber *, const decNumber *, decContext *); | |
| 151 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRemainder(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 152 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRemainderNear(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 153 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRescale(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 154 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberRotate(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 155 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSameQuantum(decNumber *, const decNumber *, const decNumber *); | |
| 156 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberScaleB(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 157 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberShift(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 158 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSquareRoot(decNumber *, const decNumber *, decContext *); | |
| 159 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberSubtract(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 160 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberToIntegralExact(decNumber *, const decNumber *, decContext *); | |
| 161 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberToIntegralValue(decNumber *, const decNumber *, decContext *); | |
| 162 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberXor(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 163 | |
| 164 /* Utilities */ | |
| 165 enum decClass uprv_decNumberClass(const decNumber *, decContext *); | |
| 166 U_INTERNAL const char * U_EXPORT2 uprv_decNumberClassToString(enum decClass); | |
| 167 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopy(decNumber *, const decNumber *); | |
| 168 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopyAbs(decNumber *, const decNumber *); | |
| 169 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopyNegate(decNumber *, const decNumber *); | |
| 170 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberCopySign(decNumber *, const decNumber *, const decNumber *); | |
| 171 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNextMinus(decNumber *, const decNumber *, decContext *); | |
| 172 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNextPlus(decNumber *, const decNumber *, decContext *); | |
| 173 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberNextToward(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 174 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberTrim(decNumber *); | |
| 175 U_INTERNAL const char * U_EXPORT2 uprv_decNumberVersion(void); | |
| 176 U_INTERNAL decNumber * U_EXPORT2 uprv_decNumberZero(decNumber *); | |
| 177 | |
| 178 /* Functions for testing decNumbers (normality depends on context) */ | |
| 179 U_INTERNAL int32_t U_EXPORT2 uprv_decNumberIsNormal(const decNumber *, decContext *); | |
| 180 U_INTERNAL int32_t U_EXPORT2 uprv_decNumberIsSubnormal(const decNumber *, decContext *); | |
| 181 | |
| 182 /* Macros for testing decNumber *dn */ | |
| 183 #define decNumberIsCanonical(dn) (1) /* All decNumbers are saintly */ | |
| 184 #define decNumberIsFinite(dn) (((dn)->bits&DECSPECIAL)==0) | |
| 185 #define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0) | |
| 186 #define decNumberIsNaN(dn) (((dn)->bits&(DECNAN|DECSNAN))!=0) | |
| 187 #define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0) | |
| 188 #define decNumberIsQNaN(dn) (((dn)->bits&(DECNAN))!=0) | |
| 189 #define decNumberIsSNaN(dn) (((dn)->bits&(DECSNAN))!=0) | |
| 190 #define decNumberIsSpecial(dn) (((dn)->bits&DECSPECIAL)!=0) | |
| 191 #define decNumberIsZero(dn) (*(dn)->lsu==0 \ | |
| 192 && (dn)->digits==1 \ | |
| 193 && (((dn)->bits&DECSPECIAL)==0)) | |
| 194 #define decNumberRadix(dn) (10) | |
| 195 | |
| 196 #endif |
