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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QLOCALE_TOOLS_P_H
#define QLOCALE_TOOLS_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of internal files. This header file may change from version to version
// without notice, or even be removed.
//
// We mean it.
//
#include "qlocale_p.h"
#include "qstring.h"
QT_BEGIN_NAMESPACE
enum StrayCharacterMode {
TrailingJunkProhibited,
TrailingJunkAllowed,
WhitespacesAllowed
};
// API note: this function can't process a number with more than 2.1 billion digits
[[nodiscard]] double qt_asciiToDouble(const char *num, qsizetype numLen, bool &ok, int &processed,
StrayCharacterMode strayCharMode = TrailingJunkProhibited);
void qt_doubleToAscii(double d, QLocaleData::DoubleForm form, int precision, char *buf, int bufSize,
bool &sign, int &length, int &decpt);
[[nodiscard]] QString qulltoBasicLatin(qulonglong l, int base, bool negative);
[[nodiscard]] QString qulltoa(qulonglong l, int base, const QStringView zero);
[[nodiscard]] Q_CORE_EXPORT QString qdtoa(qreal d, int *decpt, int *sign);
[[nodiscard]] QString qdtoBasicLatin(double d, QLocaleData::DoubleForm form,
int precision, bool uppercase);
[[nodiscard]] QByteArray qdtoAscii(double d, QLocaleData::DoubleForm form,
int precision, bool uppercase);
[[nodiscard]] constexpr inline bool isZero(double d)
{
return d == 0; // Amusingly, compilers do not grumble.
}
// Enough space for the digits before the decimal separator:
[[nodiscard]] inline int wholePartSpace(double d)
{
Q_ASSERT(d >= 0); // caller should call qAbs() if needed
// Optimize for numbers between -512k and 512k - otherwise, use the
// maximum number of digits in the whole number part of a double:
return d > (1 << 19) ? std::numeric_limits<double>::max_exponent10 + 1 : 6;
}
// Returns code-point of same kind (UCS2 or UCS4) as zero; digit is 0 through 9
template <typename UcsInt>
[[nodiscard]] inline UcsInt unicodeForDigit(uint digit, UcsInt zero)
{
// Must match QLocaleData::numericToCLocale()'s digit-digestion.
Q_ASSERT(digit < 10);
if (!digit)
return zero;
// See QTBUG-85409: Suzhou's digits are U+3007, U+3021, ..., U+3029
if (zero == u'\u3007')
return u'\u3020' + digit;
// In util/locale_database/ldml.py, LocaleScanner.numericData() asserts no
// other number system in CLDR has discontinuous digits.
return zero + digit;
}
[[nodiscard]] Q_CORE_EXPORT double qstrntod(const char *s00, qsizetype len,
char const **se, bool *ok);
[[nodiscard]] inline double qstrtod(const char *s00, char const **se, bool *ok)
{
qsizetype len = qsizetype(strlen(s00));
return qstrntod(s00, len, se, ok);
}
[[nodiscard]] qlonglong qstrntoll(const char *nptr, qsizetype size, const char **endptr,
int base, bool *ok);
[[nodiscard]] qulonglong qstrntoull(const char *nptr, qsizetype size, const char **endptr,
int base, bool *ok);
QT_END_NAMESPACE
#endif
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