Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 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" |
Victor Chang | ce4bf3c | 2021-01-19 16:34:24 +0000 | [diff] [blame] | 12 | #include "bytesinkutil.h" |
Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 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 { |
| 26 | namespace impl { |
| 27 | |
| 28 | /** A very thin C++ wrapper around decNumber.h */ |
| 29 | // Exported as U_I18N_API for tests |
| 30 | class U_I18N_API DecNum : public UMemory { |
| 31 | public: |
| 32 | DecNum(); // leaves object in valid but undefined state |
| 33 | |
| 34 | // Copy-like constructor; use the default move operators. |
| 35 | DecNum(const DecNum& other, UErrorCode& status); |
| 36 | |
| 37 | /** Sets the decNumber to the StringPiece. */ |
| 38 | void setTo(StringPiece str, UErrorCode& status); |
| 39 | |
| 40 | /** Sets the decNumber to the NUL-terminated char string. */ |
| 41 | void setTo(const char* str, UErrorCode& status); |
| 42 | |
| 43 | /** Uses double_conversion to set this decNumber to the given double. */ |
| 44 | void setTo(double d, UErrorCode& status); |
| 45 | |
| 46 | /** Sets the decNumber to the BCD representation. */ |
| 47 | void setTo(const uint8_t* bcd, int32_t length, int32_t scale, bool isNegative, UErrorCode& status); |
| 48 | |
| 49 | void normalize(); |
| 50 | |
| 51 | void multiplyBy(const DecNum& rhs, UErrorCode& status); |
| 52 | |
| 53 | void divideBy(const DecNum& rhs, UErrorCode& status); |
| 54 | |
| 55 | bool isNegative() const; |
| 56 | |
| 57 | bool isZero() const; |
| 58 | |
| 59 | void toString(ByteSink& output, UErrorCode& status) const; |
| 60 | |
Victor Chang | ce4bf3c | 2021-01-19 16:34:24 +0000 | [diff] [blame] | 61 | inline CharString toCharString(UErrorCode& status) const { |
| 62 | CharString cstr; |
| 63 | CharStringByteSink sink(&cstr); |
| 64 | toString(sink, status); |
| 65 | return cstr; |
| 66 | } |
| 67 | |
Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 68 | inline const decNumber* getRawDecNumber() const { |
| 69 | return fData.getAlias(); |
| 70 | } |
| 71 | |
| 72 | private: |
| 73 | static constexpr int32_t kDefaultDigits = DECNUM_INITIAL_CAPACITY; |
| 74 | MaybeStackHeaderAndArray<decNumber, char, kDefaultDigits> fData; |
| 75 | decContext fContext; |
| 76 | |
| 77 | void _setTo(const char* str, int32_t maxDigits, UErrorCode& status); |
| 78 | }; |
| 79 | |
| 80 | } // namespace impl |
| 81 | } // namespace number |
| 82 | |
| 83 | U_NAMESPACE_END |
| 84 | |
| 85 | #endif // __NUMBER_DECNUM_H__ |
| 86 | |
| 87 | #endif /* #if !UCONFIG_NO_FORMATTING */ |