1 // © 2017 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 4 #include "unicode/utypes.h" 5 6 #if !UCONFIG_NO_FORMATTING 7 #ifndef __NUMBER_DECNUM_H__ 8 #define __NUMBER_DECNUM_H__ 9 10 #include "decNumber.h" 11 #include "charstr.h" 12 #include "bytesinkutil.h" 13 14 U_NAMESPACE_BEGIN 15 16 #define DECNUM_INITIAL_CAPACITY 34 17 18 // Export an explicit template instantiation of the MaybeStackHeaderAndArray that is used as a data member of DecNum. 19 // When building DLLs for Windows this is required even though no direct access to the MaybeStackHeaderAndArray leaks out of the i18n library. 20 // (See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.) 21 #if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN 22 template class U_I18N_API MaybeStackHeaderAndArray<decNumber, char, DECNUM_INITIAL_CAPACITY>; 23 #endif 24 25 namespace number::impl { 26 27 /** A very thin C++ wrapper around decNumber.h */ 28 // Exported as U_I18N_API for tests 29 class U_I18N_API DecNum : public UMemory { 30 public: 31 DecNum(); // leaves object in valid but undefined state 32 33 // Copy-like constructor; use the default move operators. 34 DecNum(const DecNum& other, UErrorCode& status); 35 36 /** Sets the decNumber to the StringPiece. */ 37 void setTo(StringPiece str, UErrorCode& status); 38 39 /** Sets the decNumber to the NUL-terminated char string. */ 40 void setTo(const char* str, UErrorCode& status); 41 42 /** Uses double_conversion to set this decNumber to the given double. */ 43 void setTo(double d, UErrorCode& status); 44 45 /** Sets the decNumber to the BCD representation. */ 46 void setTo(const uint8_t* bcd, int32_t length, int32_t scale, bool isNegative, UErrorCode& status); 47 48 void normalize(); 49 50 void multiplyBy(const DecNum& rhs, UErrorCode& status); 51 52 void divideBy(const DecNum& rhs, UErrorCode& status); 53 54 bool isNegative() const; 55 56 bool isZero() const; 57 58 /** Is infinity or NaN */ 59 bool isSpecial() const; 60 61 bool isInfinity() const; 62 63 bool isNaN() const; 64 65 void toString(ByteSink& output, UErrorCode& status) const; 66 toCharString(UErrorCode & status)67 inline CharString toCharString(UErrorCode& status) const { 68 CharString cstr; 69 CharStringByteSink sink(&cstr); 70 toString(sink, status); 71 return cstr; 72 } 73 getRawDecNumber()74 inline const decNumber* getRawDecNumber() const { 75 return fData.getAlias(); 76 } 77 78 private: 79 static constexpr int32_t kDefaultDigits = DECNUM_INITIAL_CAPACITY; 80 MaybeStackHeaderAndArray<decNumber, char, kDefaultDigits> fData; 81 decContext fContext; 82 83 void _setTo(const char* str, int32_t maxDigits, UErrorCode& status); 84 }; 85 86 } // namespace number::impl 87 88 U_NAMESPACE_END 89 90 #endif // __NUMBER_DECNUM_H__ 91 92 #endif /* #if !UCONFIG_NO_FORMATTING */ 93