Mercurial > hg > CbC > CbC_gcc
annotate libdecnumber/decNumber.h @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Decimal number arithmetic module header for the decNumber C Library. |
| 131 | 2 Copyright (C) 2005-2018 Free Software Foundation, Inc. |
| 0 | 3 Contributed by IBM Corporation. Author Mike Cowlishaw. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 Under Section 7 of GPL version 3, you are granted additional | |
| 18 permissions described in the GCC Runtime Library Exception, version | |
| 19 3.1, as published by the Free Software Foundation. | |
| 20 | |
| 21 You should have received a copy of the GNU General Public License and | |
| 22 a copy of the GCC Runtime Library Exception along with this program; | |
| 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 <http://www.gnu.org/licenses/>. */ | |
| 25 | |
| 26 /* ------------------------------------------------------------------ */ | |
| 27 /* Decimal Number arithmetic module header */ | |
| 28 /* ------------------------------------------------------------------ */ | |
| 29 | |
| 30 #if !defined(DECNUMBER) | |
| 31 #define DECNUMBER | |
| 32 #define DECNAME "decNumber" /* Short name */ | |
| 33 #define DECFULLNAME "Decimal Number Module" /* Verbose name */ | |
| 34 #define DECAUTHOR "Mike Cowlishaw" /* Who to blame */ | |
| 35 | |
| 36 #if !defined(DECCONTEXT) | |
| 37 #include "decContext.h" | |
| 38 #endif | |
| 39 | |
| 40 /* Bit settings for decNumber.bits */ | |
| 41 #define DECNEG 0x80 /* Sign; 1=negative, 0=positive or zero */ | |
| 42 #define DECINF 0x40 /* 1=Infinity */ | |
| 43 #define DECNAN 0x20 /* 1=NaN */ | |
|
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44 #define DECSNAN 0x10 /* 1=sNaN */ |
| 0 | 45 /* The remaining bits are reserved; they must be 0 */ |
| 46 #define DECSPECIAL (DECINF|DECNAN|DECSNAN) /* any special value */ | |
| 47 | |
| 48 /* Define the decNumber data structure. The size and shape of the */ | |
| 49 /* units array in the structure is determined by the following */ | |
| 50 /* constant. This must not be changed without recompiling the */ | |
| 51 /* decNumber library modules. */ | |
| 52 | |
| 53 #define DECDPUN 3 /* DECimal Digits Per UNit [must be >0 */ | |
| 54 /* and <10; 3 or powers of 2 are best]. */ | |
| 55 | |
| 56 /* DECNUMDIGITS is the default number of digits that can be held in */ | |
| 57 /* the structure. If undefined, 1 is assumed and it is assumed */ | |
| 58 /* that the structure will be immediately followed by extra space, */ | |
| 59 /* as required. DECNUMDIGITS is always >0. */ | |
| 60 #if !defined(DECNUMDIGITS) | |
| 61 #define DECNUMDIGITS 1 | |
| 62 #endif | |
| 63 | |
| 64 /* The size (integer data type) of each unit is determined by the */ | |
| 65 /* number of digits it will hold. */ | |
| 66 #if DECDPUN<=2 | |
| 67 #define decNumberUnit uint8_t | |
| 68 #elif DECDPUN<=4 | |
| 69 #define decNumberUnit uint16_t | |
| 70 #else | |
| 71 #define decNumberUnit uint32_t | |
| 72 #endif | |
| 73 /* The number of units needed is ceil(DECNUMDIGITS/DECDPUN) */ | |
| 74 #define DECNUMUNITS ((DECNUMDIGITS+DECDPUN-1)/DECDPUN) | |
| 75 | |
| 76 /* The data structure... */ | |
| 77 typedef struct { | |
| 78 int32_t digits; /* Count of digits in the coefficient; >0 */ | |
| 79 int32_t exponent; /* Unadjusted exponent, unbiased, in */ | |
| 80 /* range: -1999999997 through 999999999 */ | |
| 81 uint8_t bits; /* Indicator bits (see above) */ | |
| 82 /* Coefficient, from least significant unit */ | |
| 83 decNumberUnit lsu[DECNUMUNITS]; | |
| 84 } decNumber; | |
| 85 | |
| 86 /* Notes: */ | |
| 87 /* 1. If digits is > DECDPUN then there will one or more */ | |
| 88 /* decNumberUnits immediately following the first element of lsu.*/ | |
| 89 /* These contain the remaining (more significant) digits of the */ | |
| 90 /* number, and may be in the lsu array, or may be guaranteed by */ | |
| 91 /* some other mechanism (such as being contained in another */ | |
| 92 /* structure, or being overlaid on dynamically allocated */ | |
| 93 /* storage). */ | |
| 94 /* */ | |
| 95 /* Each integer of the coefficient (except potentially the last) */ | |
| 96 /* contains DECDPUN digits (e.g., a value in the range 0 through */ | |
| 97 /* 99999999 if DECDPUN is 8, or 0 through 999 if DECDPUN is 3). */ | |
| 98 /* */ | |
| 99 /* 2. A decNumber converted to a string may need up to digits+14 */ | |
| 100 /* characters. The worst cases (non-exponential and exponential */ | |
| 101 /* formats) are -0.00000{9...}# and -9.{9...}E+999999999# */ | |
| 102 /* (where # is '\0') */ | |
| 103 | |
| 104 | |
| 105 /* ---------------------------------------------------------------- */ | |
| 106 /* decNumber public functions and macros */ | |
| 107 /* ---------------------------------------------------------------- */ | |
| 108 | |
| 109 #include "decNumberSymbols.h" | |
| 110 | |
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111 #ifdef __cplusplus |
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112 extern "C" { |
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113 #endif |
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114 |
| 0 | 115 /* Conversions */ |
| 116 decNumber * decNumberFromInt32(decNumber *, int32_t); | |
| 117 decNumber * decNumberFromUInt32(decNumber *, uint32_t); | |
| 118 decNumber * decNumberFromString(decNumber *, const char *, decContext *); | |
| 119 char * decNumberToString(const decNumber *, char *); | |
| 120 char * decNumberToEngString(const decNumber *, char *); | |
| 121 uint32_t decNumberToUInt32(const decNumber *, decContext *); | |
| 122 int32_t decNumberToInt32(const decNumber *, decContext *); | |
| 123 uint8_t * decNumberGetBCD(const decNumber *, uint8_t *); | |
| 124 decNumber * decNumberSetBCD(decNumber *, const uint8_t *, uint32_t); | |
| 125 | |
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126 /* Operators and elementary functions */ |
| 0 | 127 decNumber * decNumberAbs(decNumber *, const decNumber *, decContext *); |
| 128 decNumber * decNumberAdd(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 129 decNumber * decNumberAnd(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 130 decNumber * decNumberCompare(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 131 decNumber * decNumberCompareSignal(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 132 decNumber * decNumberCompareTotal(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 133 decNumber * decNumberCompareTotalMag(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 134 decNumber * decNumberDivide(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 135 decNumber * decNumberDivideInteger(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 136 decNumber * decNumberExp(decNumber *, const decNumber *, decContext *); | |
| 137 decNumber * decNumberFMA(decNumber *, const decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 138 decNumber * decNumberInvert(decNumber *, const decNumber *, decContext *); | |
| 139 decNumber * decNumberLn(decNumber *, const decNumber *, decContext *); | |
| 140 decNumber * decNumberLogB(decNumber *, const decNumber *, decContext *); | |
| 141 decNumber * decNumberLog10(decNumber *, const decNumber *, decContext *); | |
| 142 decNumber * decNumberMax(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 143 decNumber * decNumberMaxMag(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 144 decNumber * decNumberMin(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 145 decNumber * decNumberMinMag(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 146 decNumber * decNumberMinus(decNumber *, const decNumber *, decContext *); | |
| 147 decNumber * decNumberMultiply(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 148 decNumber * decNumberNormalize(decNumber *, const decNumber *, decContext *); | |
| 149 decNumber * decNumberOr(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 150 decNumber * decNumberPlus(decNumber *, const decNumber *, decContext *); | |
| 151 decNumber * decNumberPower(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 152 decNumber * decNumberQuantize(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 153 decNumber * decNumberReduce(decNumber *, const decNumber *, decContext *); | |
| 154 decNumber * decNumberRemainder(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 155 decNumber * decNumberRemainderNear(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 156 decNumber * decNumberRescale(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 157 decNumber * decNumberRotate(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 158 decNumber * decNumberSameQuantum(decNumber *, const decNumber *, const decNumber *); | |
| 159 decNumber * decNumberScaleB(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 160 decNumber * decNumberShift(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 161 decNumber * decNumberSquareRoot(decNumber *, const decNumber *, decContext *); | |
| 162 decNumber * decNumberSubtract(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 163 decNumber * decNumberToIntegralExact(decNumber *, const decNumber *, decContext *); | |
| 164 decNumber * decNumberToIntegralValue(decNumber *, const decNumber *, decContext *); | |
| 165 decNumber * decNumberXor(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 166 | |
| 167 /* Utilities */ | |
| 168 enum decClass decNumberClass(const decNumber *, decContext *); | |
| 169 const char * decNumberClassToString(enum decClass); | |
| 170 decNumber * decNumberCopy(decNumber *, const decNumber *); | |
| 171 decNumber * decNumberCopyAbs(decNumber *, const decNumber *); | |
| 172 decNumber * decNumberCopyNegate(decNumber *, const decNumber *); | |
| 173 decNumber * decNumberCopySign(decNumber *, const decNumber *, const decNumber *); | |
| 174 decNumber * decNumberNextMinus(decNumber *, const decNumber *, decContext *); | |
| 175 decNumber * decNumberNextPlus(decNumber *, const decNumber *, decContext *); | |
| 176 decNumber * decNumberNextToward(decNumber *, const decNumber *, const decNumber *, decContext *); | |
| 177 decNumber * decNumberTrim(decNumber *); | |
| 178 const char * decNumberVersion(void); | |
| 179 decNumber * decNumberZero(decNumber *); | |
| 180 | |
| 181 /* Functions for testing decNumbers (normality depends on context) */ | |
| 182 int32_t decNumberIsNormal(const decNumber *, decContext *); | |
| 183 int32_t decNumberIsSubnormal(const decNumber *, decContext *); | |
| 184 | |
| 185 /* Macros for testing decNumber *dn */ | |
| 186 #define decNumberIsCanonical(dn) (1) /* All decNumbers are saintly */ | |
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187 #define decNumberIsFinite(dn) (((dn)->bits&DECSPECIAL)==0) |
| 0 | 188 #define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0) |
| 189 #define decNumberIsNaN(dn) (((dn)->bits&(DECNAN|DECSNAN))!=0) | |
| 190 #define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0) | |
| 191 #define decNumberIsQNaN(dn) (((dn)->bits&(DECNAN))!=0) | |
| 192 #define decNumberIsSNaN(dn) (((dn)->bits&(DECSNAN))!=0) | |
| 193 #define decNumberIsSpecial(dn) (((dn)->bits&DECSPECIAL)!=0) | |
| 194 #define decNumberIsZero(dn) (*(dn)->lsu==0 \ | |
| 195 && (dn)->digits==1 \ | |
| 196 && (((dn)->bits&DECSPECIAL)==0)) | |
| 197 #define decNumberRadix(dn) (10) | |
| 198 | |
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199 #ifdef __cplusplus |
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200 } |
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201 #endif |
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202 |
| 0 | 203 #endif |