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88 lines
2.6 KiB
88 lines
2.6 KiB
4 months ago
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// © 2017 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#ifndef __NUMBER_DECNUM_H__
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#define __NUMBER_DECNUM_H__
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#include "decNumber.h"
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#include "charstr.h"
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#include "bytesinkutil.h"
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U_NAMESPACE_BEGIN
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#define DECNUM_INITIAL_CAPACITY 34
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// Export an explicit template instantiation of the MaybeStackHeaderAndArray that is used as a data member of DecNum.
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// When building DLLs for Windows this is required even though no direct access to the MaybeStackHeaderAndArray leaks out of the i18n library.
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// (See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.)
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#if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
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template class U_I18N_API MaybeStackHeaderAndArray<decNumber, char, DECNUM_INITIAL_CAPACITY>;
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#endif
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namespace number {
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namespace impl {
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/** A very thin C++ wrapper around decNumber.h */
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// Exported as U_I18N_API for tests
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class U_I18N_API DecNum : public UMemory {
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public:
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DecNum(); // leaves object in valid but undefined state
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// Copy-like constructor; use the default move operators.
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DecNum(const DecNum& other, UErrorCode& status);
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/** Sets the decNumber to the StringPiece. */
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void setTo(StringPiece str, UErrorCode& status);
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/** Sets the decNumber to the NUL-terminated char string. */
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void setTo(const char* str, UErrorCode& status);
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/** Uses double_conversion to set this decNumber to the given double. */
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void setTo(double d, UErrorCode& status);
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/** Sets the decNumber to the BCD representation. */
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void setTo(const uint8_t* bcd, int32_t length, int32_t scale, bool isNegative, UErrorCode& status);
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void normalize();
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void multiplyBy(const DecNum& rhs, UErrorCode& status);
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void divideBy(const DecNum& rhs, UErrorCode& status);
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bool isNegative() const;
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bool isZero() const;
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void toString(ByteSink& output, UErrorCode& status) const;
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inline CharString toCharString(UErrorCode& status) const {
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CharString cstr;
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CharStringByteSink sink(&cstr);
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toString(sink, status);
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return cstr;
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}
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inline const decNumber* getRawDecNumber() const {
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return fData.getAlias();
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}
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private:
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static constexpr int32_t kDefaultDigits = DECNUM_INITIAL_CAPACITY;
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MaybeStackHeaderAndArray<decNumber, char, kDefaultDigits> fData;
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decContext fContext;
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void _setTo(const char* str, int32_t maxDigits, UErrorCode& status);
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};
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} // namespace impl
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} // namespace number
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U_NAMESPACE_END
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#endif // __NUMBER_DECNUM_H__
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#endif /* #if !UCONFIG_NO_FORMATTING */
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