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// © 2017 and later: Unicode, Inc. and others.
// License & terms of use:
#include "unicode/utypes.h"
#ifndef __NUMBER_DECNUM_H__
#define __NUMBER_DECNUM_H__
#include "decNumber.h"
#include "charstr.h"
#include "bytesinkutil.h"
// 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.)
template class U_I18N_API MaybeStackHeaderAndArray<decNumber, char, DECNUM_INITIAL_CAPACITY>;
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 {
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;
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();
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
#endif // __NUMBER_DECNUM_H__
#endif /* #if !UCONFIG_NO_FORMATTING */