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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 "qtextstream.h"
57#if QT_CONFIG(textcodec)
58#include "qtextcodec.h"
59#endif
60
61QT_BEGIN_NAMESPACE
62
63#ifndef QT_NO_QOBJECT
64class QDeviceClosedNotifier : public QObject
65{
66 Q_OBJECT
67public:
68 inline QDeviceClosedNotifier()
69 { }
70
71 inline void setupDevice(QTextStream *stream, QIODevice *device)
72 {
73 disconnect();
74 if (device)
75 connect(sender: device, SIGNAL(aboutToClose()), receiver: this, SLOT(flushStream()));
76 this->stream = stream;
77 }
78
79public Q_SLOTS:
80 inline void flushStream() { stream->flush(); }
81
82private:
83 QTextStream *stream;
84};
85#endif
86
87class QTextStreamPrivate
88{
89 Q_DECLARE_PUBLIC(QTextStream)
90public:
91 // streaming parameters
92 class Params
93 {
94 public:
95 void reset();
96
97 int realNumberPrecision;
98 int integerBase;
99 int fieldWidth;
100 QChar padChar;
101 QTextStream::FieldAlignment fieldAlignment;
102 QTextStream::RealNumberNotation realNumberNotation;
103 QTextStream::NumberFlags numberFlags;
104 };
105
106 QTextStreamPrivate(QTextStream *q_ptr);
107 ~QTextStreamPrivate();
108 void reset();
109
110 // device
111 QIODevice *device;
112#ifndef QT_NO_QOBJECT
113 QDeviceClosedNotifier deviceClosedNotifier;
114#endif
115
116 // string
117 QString *string;
118 int stringOffset;
119 QIODevice::OpenMode stringOpenMode;
120
121#if QT_CONFIG(textcodec)
122 // codec
123 QTextCodec *codec;
124 QTextCodec::ConverterState readConverterState;
125 QTextCodec::ConverterState writeConverterState;
126 QTextCodec::ConverterState *readConverterSavedState;
127#endif
128
129 QString writeBuffer;
130 QString readBuffer;
131 int readBufferOffset;
132 int readConverterSavedStateOffset; //the offset between readBufferStartDevicePos and that start of the buffer
133 qint64 readBufferStartDevicePos;
134
135 Params params;
136
137 // status
138 QTextStream::Status status;
139 QLocale locale;
140 QTextStream *q_ptr;
141
142 int lastTokenSize;
143 bool deleteDevice;
144#if QT_CONFIG(textcodec)
145 bool autoDetectUnicode;
146#endif
147
148 // i/o
149 enum TokenDelimiter {
150 Space,
151 NotSpace,
152 EndOfLine
153 };
154
155 QString read(int maxlen);
156 bool scan(const QChar **ptr, int *tokenLength,
157 int maxlen, TokenDelimiter delimiter);
158 inline const QChar *readPtr() const;
159 inline void consumeLastToken();
160 inline void consume(int nchars);
161 void saveConverterState(qint64 newPos);
162 void restoreToSavedConverterState();
163
164 // Return value type for getNumber()
165 enum NumberParsingStatus {
166 npsOk,
167 npsMissingDigit,
168 npsInvalidPrefix
169 };
170
171 inline bool getChar(QChar *ch);
172 inline void ungetChar(QChar ch);
173 NumberParsingStatus getNumber(qulonglong *l);
174 bool getReal(double *f);
175
176 inline void write(const QString &data) { write(data: data.begin(), len: data.length()); }
177 inline void write(QChar ch);
178 void write(const QChar *data, int len);
179 void write(QLatin1String data);
180 void writePadding(int len);
181 inline void putString(const QString &ch, bool number = false) { putString(data: ch.constData(), len: ch.length(), number); }
182 void putString(const QChar *data, int len, bool number = false);
183 void putString(QLatin1String data, bool number = false);
184 inline void putChar(QChar ch);
185 void putNumber(qulonglong number, bool negative);
186
187 struct PaddingResult {
188 int left, right;
189 };
190 PaddingResult padding(int len) const;
191
192 // buffers
193 bool fillReadBuffer(qint64 maxBytes = -1);
194 void resetReadBuffer();
195 void flushWriteBuffer();
196};
197
198QT_END_NAMESPACE
199
200#endif // QTEXTSTREAM_P_H
201

source code of qtbase/src/corelib/serialization/qtextstream_p.h