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39
40#ifndef QLOCALE_TOOLS_P_H
41#define QLOCALE_TOOLS_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of internal files. This header file may change from version to version
49// without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qlocale_p.h"
55#include "qstring.h"
56
57QT_BEGIN_NAMESPACE
58
59enum StrayCharacterMode {
60 TrailingJunkProhibited,
61 TrailingJunkAllowed,
62 WhitespacesAllowed
63};
64
65// API note: this function can't process a number with more than 2.1 billion digits
66double qt_asciiToDouble(const char *num, qsizetype numLen, bool &ok, int &processed,
67 StrayCharacterMode strayCharMode = TrailingJunkProhibited);
68void qt_doubleToAscii(double d, QLocaleData::DoubleForm form, int precision, char *buf, int bufSize,
69 bool &sign, int &length, int &decpt);
70
71QString qulltoa(qulonglong l, int base, const QStringView zero);
72Q_CORE_EXPORT QString qdtoa(qreal d, int *decpt, int *sign);
73
74inline bool isZero(double d)
75{
76 uchar *ch = (uchar *)&d;
77 if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
78 return !(ch[0] & 0x7F || ch[1] || ch[2] || ch[3] || ch[4] || ch[5] || ch[6] || ch[7]);
79 } else {
80 return !(ch[7] & 0x7F || ch[6] || ch[5] || ch[4] || ch[3] || ch[2] || ch[1] || ch[0]);
81 }
82}
83
84// Enough space for the digits before the decimal separator:
85inline int wholePartSpace(double d)
86{
87 Q_ASSERT(d >= 0); // caller should call qAbs() if needed
88 // Optimize for numbers between -512k and 512k - otherwise, use the
89 // maximum number of digits in the whole number part of a double:
90 return d > (1 << 19) ? std::numeric_limits<double>::max_exponent10 + 1 : 6;
91}
92
93// Returns code-point of same kind (UCS2 or UCS4) as zero; digit is 0 through 9
94template <typename UcsInt>
95inline UcsInt unicodeForDigit(uint digit, UcsInt zero)
96{
97 // Must match QLocaleData::numericToCLocale()'s digit-digestion.
98 Q_ASSERT(digit < 10);
99 if (!digit)
100 return zero;
101
102 // See QTBUG-85409: Suzhou's digits are U+3007, U+2021, ..., U+3029
103 if (zero == u'\u3007')
104 return u'\u3020' + digit;
105 // At CLDR 36.1, no other number system's digits were discontinuous.
106
107 return zero + digit;
108}
109
110Q_CORE_EXPORT double qstrntod(const char *s00, qsizetype len, char const **se, bool *ok);
111inline double qstrtod(const char *s00, char const **se, bool *ok)
112{
113 qsizetype len = qsizetype(strlen(s00));
114 return qstrntod(s00, len, se, ok);
115}
116
117qlonglong qstrtoll(const char *nptr, const char **endptr, int base, bool *ok);
118qulonglong qstrtoull(const char *nptr, const char **endptr, int base, bool *ok);
119
120QT_END_NAMESPACE
121
122#endif
123