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 13 U_NAMESPACE_BEGIN 14 15 #define DECNUM_INITIAL_CAPACITY 34 16 17 // Export an explicit template instantiation of the MaybeStackHeaderAndArray that is used as a data member of DecNum. 18 // When building DLLs for Windows this is required even though no direct access to the MaybeStackHeaderAndArray leaks out of the i18n library. 19 // (See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.) 20 #if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN 21 template class U_I18N_API MaybeStackHeaderAndArray<decNumber, char, DECNUM_INITIAL_CAPACITY>; 22 #endif 23 24 namespace number { 25 namespace 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 getRawDecNumber()58 inline const decNumber* getRawDecNumber() const { 59 return fData.getAlias(); 60 } 61 62 private: 63 static constexpr int32_t kDefaultDigits = DECNUM_INITIAL_CAPACITY; 64 MaybeStackHeaderAndArray<decNumber, char, kDefaultDigits> fData; 65 decContext fContext; 66 67 void _setTo(const char* str, int32_t maxDigits, UErrorCode& status); 68 }; 69 70 } // namespace impl 71 } // namespace number 72 73 U_NAMESPACE_END 74 75 #endif // __NUMBER_DECNUM_H__ 76 77 #endif /* #if !UCONFIG_NO_FORMATTING */ 78