1 | // Copyright (C) 2021 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #ifndef QLOCALE_TOOLS_P_H |
5 | #define QLOCALE_TOOLS_P_H |
6 | |
7 | // |
8 | // W A R N I N G |
9 | // ------------- |
10 | // |
11 | // This file is not part of the Qt API. It exists for the convenience |
12 | // of internal files. This header file may change from version to version |
13 | // without notice, or even be removed. |
14 | // |
15 | // We mean it. |
16 | // |
17 | |
18 | #include "qlocale_p.h" |
19 | #include "qstring.h" |
20 | |
21 | QT_BEGIN_NAMESPACE |
22 | |
23 | enum StrayCharacterMode { |
24 | TrailingJunkProhibited, |
25 | TrailingJunkAllowed, |
26 | WhitespacesAllowed |
27 | }; |
28 | |
29 | template <typename T> struct QSimpleParsedNumber |
30 | { |
31 | T result; |
32 | // When used < 0, -used is how much was used, but it was an error. |
33 | qsizetype used; |
34 | bool ok() const { return used > 0; } |
35 | }; |
36 | |
37 | // API note: this function can't process a number with more than 2.1 billion digits |
38 | [[nodiscard]] QSimpleParsedNumber<double> |
39 | qt_asciiToDouble(const char *num, qsizetype numLen, |
40 | StrayCharacterMode strayCharMode = TrailingJunkProhibited); |
41 | void qt_doubleToAscii(double d, QLocaleData::DoubleForm form, int precision, |
42 | char *buf, qsizetype bufSize, |
43 | bool &sign, int &length, int &decpt); |
44 | |
45 | [[nodiscard]] QString qulltoBasicLatin(qulonglong l, int base, bool negative); |
46 | [[nodiscard]] QString qulltoa(qulonglong l, int base, const QStringView zero); |
47 | [[nodiscard]] Q_CORE_EXPORT QString qdtoa(qreal d, int *decpt, int *sign); |
48 | [[nodiscard]] QString qdtoBasicLatin(double d, QLocaleData::DoubleForm form, |
49 | int precision, bool uppercase); |
50 | [[nodiscard]] QByteArray qdtoAscii(double d, QLocaleData::DoubleForm form, |
51 | int precision, bool uppercase); |
52 | |
53 | [[nodiscard]] constexpr inline bool isZero(double d) |
54 | { |
55 | return d == 0; // Amusingly, compilers do not grumble. |
56 | } |
57 | |
58 | // Enough space for the digits before the decimal separator: |
59 | [[nodiscard]] inline int wholePartSpace(double d) |
60 | { |
61 | Q_ASSERT(d >= 0); // caller should call qAbs() if needed |
62 | // Optimize for numbers between -512k and 512k - otherwise, use the |
63 | // maximum number of digits in the whole number part of a double: |
64 | return d > (1 << 19) ? std::numeric_limits<double>::max_exponent10 + 1 : 6; |
65 | } |
66 | |
67 | // Returns code-point of same kind (UCS2 or UCS4) as zero; digit is 0 through 9 |
68 | template <typename UcsInt> |
69 | [[nodiscard]] inline UcsInt unicodeForDigit(uint digit, UcsInt zero) |
70 | { |
71 | // Must match qlocale.cpp's NumberTokenizer's digit-digestion. |
72 | Q_ASSERT(digit < 10); |
73 | if (!digit) |
74 | return zero; |
75 | |
76 | // See QTBUG-85409: Suzhou's digits are U+3007, U+3021, ..., U+3029 |
77 | if (zero == u'\u3007') |
78 | return u'\u3020' + digit; |
79 | // In util/locale_database/ldml.py, LocaleScanner.numericData() asserts no |
80 | // other number system in CLDR has discontinuous digits. |
81 | |
82 | return zero + digit; |
83 | } |
84 | |
85 | [[nodiscard]] Q_CORE_EXPORT double qstrntod(const char *s00, qsizetype len, |
86 | char const **se, bool *ok); |
87 | [[nodiscard]] inline double qstrtod(const char *s00, char const **se, bool *ok) |
88 | { |
89 | qsizetype len = qsizetype(strlen(s: s00)); |
90 | return qstrntod(s00, len, se, ok); |
91 | } |
92 | |
93 | [[nodiscard]] QSimpleParsedNumber<qlonglong> qstrntoll(const char *nptr, qsizetype size, int base); |
94 | [[nodiscard]] QSimpleParsedNumber<qulonglong> qstrntoull(const char *nptr, qsizetype size, int base); |
95 | |
96 | QT_END_NAMESPACE |
97 | |
98 | #endif |
99 | |