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Diffstat (limited to 'intl/icu/source/i18n/number_decnum.h')
-rw-r--r-- | intl/icu/source/i18n/number_decnum.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/number_decnum.h b/intl/icu/source/i18n/number_decnum.h new file mode 100644 index 0000000000..94a0b31bcb --- /dev/null +++ b/intl/icu/source/i18n/number_decnum.h @@ -0,0 +1,94 @@ +// © 2017 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html + +#include "unicode/utypes.h" + +#if !UCONFIG_NO_FORMATTING +#ifndef __NUMBER_DECNUM_H__ +#define __NUMBER_DECNUM_H__ + +#include "decNumber.h" +#include "charstr.h" +#include "bytesinkutil.h" + +U_NAMESPACE_BEGIN + +#define DECNUM_INITIAL_CAPACITY 34 + +// Export an explicit template instantiation of the MaybeStackHeaderAndArray that is used as a data member of DecNum. +// When building DLLs for Windows this is required even though no direct access to the MaybeStackHeaderAndArray leaks out of the i18n library. +// (See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.) +#if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN +template class U_I18N_API MaybeStackHeaderAndArray<decNumber, char, DECNUM_INITIAL_CAPACITY>; +#endif + +namespace number { +namespace impl { + +/** A very thin C++ wrapper around decNumber.h */ +// Exported as U_I18N_API for tests +class U_I18N_API DecNum : public UMemory { + public: + DecNum(); // leaves object in valid but undefined state + + // Copy-like constructor; use the default move operators. + DecNum(const DecNum& other, UErrorCode& status); + + /** Sets the decNumber to the StringPiece. */ + void setTo(StringPiece str, UErrorCode& status); + + /** Sets the decNumber to the NUL-terminated char string. */ + void setTo(const char* str, UErrorCode& status); + + /** Uses double_conversion to set this decNumber to the given double. */ + void setTo(double d, UErrorCode& status); + + /** Sets the decNumber to the BCD representation. */ + void setTo(const uint8_t* bcd, int32_t length, int32_t scale, bool isNegative, UErrorCode& status); + + void normalize(); + + void multiplyBy(const DecNum& rhs, UErrorCode& status); + + void divideBy(const DecNum& rhs, UErrorCode& status); + + bool isNegative() const; + + bool isZero() const; + + /** Is infinity or NaN */ + bool isSpecial() const; + + bool isInfinity() const; + + bool isNaN() const; + + void toString(ByteSink& output, UErrorCode& status) const; + + inline CharString toCharString(UErrorCode& status) const { + CharString cstr; + CharStringByteSink sink(&cstr); + toString(sink, status); + return cstr; + } + + inline const decNumber* getRawDecNumber() const { + return fData.getAlias(); + } + + private: + static constexpr int32_t kDefaultDigits = DECNUM_INITIAL_CAPACITY; + MaybeStackHeaderAndArray<decNumber, char, kDefaultDigits> fData; + decContext fContext; + + void _setTo(const char* str, int32_t maxDigits, UErrorCode& status); +}; + +} // namespace impl +} // namespace number + +U_NAMESPACE_END + +#endif // __NUMBER_DECNUM_H__ + +#endif /* #if !UCONFIG_NO_FORMATTING */ |