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40
41#ifndef QTEXTSTREAM_P_H
42#define QTEXTSTREAM_P_H
43
44//
45// W A R N I N G
46// -------------
47//
48// This file is not part of the Qt API. It exists purely as an
49// implementation detail. This header file may change from version to
50// version without notice, or even be removed.
51//
52// We mean it.
53//
54
55#include <QtCore/private/qglobal_p.h>
56#include "qiodevice.h"
57#include "qlocale.h"
58#include "qtextstream.h"
59
60QT_BEGIN_NAMESPACE
61
62#ifndef QT_NO_QOBJECT
63class QDeviceClosedNotifier : public QObject
64{
65 Q_OBJECT
66public:
67 inline QDeviceClosedNotifier()
68 { }
69
70 inline void setupDevice(QTextStream *stream, QIODevice *device)
71 {
72 disconnect();
73 if (device)
74 connect(device, SIGNAL(aboutToClose()), this, SLOT(flushStream()));
75 this->stream = stream;
76 }
77
78public Q_SLOTS:
79 inline void flushStream() { stream->flush(); }
80
81private:
82 QTextStream *stream;
83};
84#endif
85
86class QTextStreamPrivate
87{
88 Q_DECLARE_PUBLIC(QTextStream)
89public:
90 // streaming parameters
91 class Params
92 {
93 public:
94 void reset();
95
96 int realNumberPrecision;
97 int integerBase;
98 int fieldWidth;
99 QChar padChar;
100 QTextStream::FieldAlignment fieldAlignment;
101 QTextStream::RealNumberNotation realNumberNotation;
102 QTextStream::NumberFlags numberFlags;
103 };
104
105 QTextStreamPrivate(QTextStream *q_ptr);
106 ~QTextStreamPrivate();
107 void reset();
108
109 // device
110 QIODevice *device;
111#ifndef QT_NO_QOBJECT
112 QDeviceClosedNotifier deviceClosedNotifier;
113#endif
114
115 // string
116 QString *string;
117 int stringOffset;
118 QIODevice::OpenMode stringOpenMode;
119
120 QStringConverter::Encoding encoding = QStringConverter::Utf8;
121 QStringEncoder fromUtf16;
122 QStringDecoder toUtf16;
123 QStringDecoder savedToUtf16;
124
125 QString writeBuffer;
126 QString readBuffer;
127 int readBufferOffset;
128 int readConverterSavedStateOffset; //the offset between readBufferStartDevicePos and that start of the buffer
129 qint64 readBufferStartDevicePos;
130
131 Params params;
132
133 // status
134 QTextStream::Status status;
135 QLocale locale;
136 QTextStream *q_ptr;
137
138 int lastTokenSize;
139 bool deleteDevice;
140 bool autoDetectUnicode;
141 bool hasWrittenData = false;
142 bool generateBOM = false;
143
144 // i/o
145 enum TokenDelimiter {
146 Space,
147 NotSpace,
148 EndOfLine
149 };
150
151 QString read(int maxlen);
152 bool scan(const QChar **ptr, int *tokenLength,
153 int maxlen, TokenDelimiter delimiter);
154 inline const QChar *readPtr() const;
155 inline void consumeLastToken();
156 inline void consume(int nchars);
157 void saveConverterState(qint64 newPos);
158 void restoreToSavedConverterState();
159
160 // Return value type for getNumber()
161 enum NumberParsingStatus {
162 npsOk,
163 npsMissingDigit,
164 npsInvalidPrefix
165 };
166
167 inline bool getChar(QChar *ch);
168 inline void ungetChar(QChar ch);
169 NumberParsingStatus getNumber(qulonglong *l);
170 bool getReal(double *f);
171
172 inline void write(const QString &data) { write(data.begin(), data.length()); }
173 inline void write(QChar ch);
174 void write(const QChar *data, int len);
175 void write(QLatin1String data);
176 void writePadding(int len);
177 inline void putString(const QString &ch, bool number = false) { putString(ch.constData(), ch.length(), number); }
178 void putString(const QChar *data, int len, bool number = false);
179 void putString(QLatin1String data, bool number = false);
180 void putString(QUtf8StringView data, bool number = false);
181 inline void putChar(QChar ch);
182 void putNumber(qulonglong number, bool negative);
183
184 struct PaddingResult {
185 int left, right;
186 };
187 PaddingResult padding(int len) const;
188
189 // buffers
190 bool fillReadBuffer(qint64 maxBytes = -1);
191 void resetReadBuffer();
192 void flushWriteBuffer();
193};
194
195QT_END_NAMESPACE
196
197#endif // QTEXTSTREAM_P_H
198