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// Copyright (C) 2018 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QCBORSTREAMREADER_H
#define QCBORSTREAMREADER_H
#include <QtCore/qbytearray.h>
#include <QtCore/qcborcommon.h>
#include <QtCore/qfloat16.h>
#include <QtCore/qscopedpointer.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringview.h>
QT_REQUIRE_CONFIG(cborstreamreader);
/* X11 headers use these values too, but as defines */
#if defined(False) && defined(True)
# undef True
# undef False
#endif
QT_BEGIN_NAMESPACE
class QIODevice;
class QCborStreamReaderPrivate;
class Q_CORE_EXPORT QCborStreamReader
{
Q_GADGET
public:
enum Type : quint8 {
UnsignedInteger = 0x00,
NegativeInteger = 0x20,
ByteString = 0x40,
ByteArray = ByteString,
TextString = 0x60,
String = TextString,
Array = 0x80,
Map = 0xa0,
Tag = 0xc0,
SimpleType = 0xe0,
HalfFloat = 0xf9,
Float16 = HalfFloat,
Float = 0xfa,
Double = 0xfb,
Invalid = 0xff
};
Q_ENUM(Type)
enum StringResultCode {
EndOfString = 0,
Ok = 1,
Error = -1
};
template <typename Container> struct StringResult {
Container data;
StringResultCode status = Error;
};
Q_ENUM(StringResultCode)
QCborStreamReader();
QCborStreamReader(const char *data, qsizetype len);
QCborStreamReader(const quint8 *data, qsizetype len);
explicit QCborStreamReader(const QByteArray &data);
explicit QCborStreamReader(QIODevice *device);
~QCborStreamReader();
Q_DISABLE_COPY(QCborStreamReader)
void setDevice(QIODevice *device);
QIODevice *device() const;
void addData(const QByteArray &data);
void addData(const char *data, qsizetype len);
void addData(const quint8 *data, qsizetype len)
{ addData(reinterpret_cast<const char *>(data), len); }
void reparse();
void clear();
void reset();
#if QT_CORE_REMOVED_SINCE(6, 7)
QCborError lastError();
#endif
QCborError lastError() const;
qint64 currentOffset() const;
bool isValid() const { return !isInvalid(); }
int containerDepth() const;
QCborStreamReader::Type parentContainerType() const;
bool hasNext() const noexcept Q_DECL_PURE_FUNCTION;
bool next(int maxRecursion = 10000);
Type type() const { return QCborStreamReader::Type(type_); }
bool isUnsignedInteger() const { return type() == UnsignedInteger; }
bool isNegativeInteger() const { return type() == NegativeInteger; }
bool isInteger() const { return quint8(type()) <= quint8(NegativeInteger); }
bool isByteArray() const { return type() == ByteArray; }
bool isString() const { return type() == String; }
bool isArray() const { return type() == Array; }
bool isMap() const { return type() == Map; }
bool isTag() const { return type() == Tag; }
bool isSimpleType() const { return type() == SimpleType; }
bool isFloat16() const { return type() == Float16; }
bool isFloat() const { return type() == Float; }
bool isDouble() const { return type() == Double; }
bool isInvalid() const { return type() == Invalid; }
bool isSimpleType(QCborSimpleType st) const { return isSimpleType() && toSimpleType() == st; }
bool isFalse() const { return isSimpleType(QCborSimpleType::False); }
bool isTrue() const { return isSimpleType(QCborSimpleType::True); }
bool isBool() const { return isFalse() || isTrue(); }
bool isNull() const { return isSimpleType(QCborSimpleType::Null); }
bool isUndefined() const { return isSimpleType(QCborSimpleType::Undefined); }
bool isLengthKnown() const noexcept Q_DECL_PURE_FUNCTION;
quint64 length() const;
bool isContainer() const { return isMap() || isArray(); }
bool enterContainer() { Q_ASSERT(isContainer()); return _enterContainer_helper(); }
bool leaveContainer();
bool readAndAppendToString(QString &dst)
{ Q_ASSERT(isString()); return _readAndAppendToString_helper(dst); }
bool readAndAppendToUtf8String(QByteArray &dst)
{ Q_ASSERT(isString()); return _readAndAppendToUtf8String_helper(dst); }
bool readAndAppendToByteArray(QByteArray &dst)
{ Q_ASSERT(isByteArray()); return _readAndAppendToByteArray_helper(dst); }
StringResult<QString> readString() { Q_ASSERT(isString()); return _readString_helper(); }
StringResult<QByteArray> readUtf8String() { Q_ASSERT(isString()); return _readUtf8String_helper(); }
StringResult<QByteArray> readByteArray(){ Q_ASSERT(isByteArray()); return _readByteArray_helper(); }
qsizetype currentStringChunkSize() const{ Q_ASSERT(isString() || isByteArray()); return _currentStringChunkSize(); }
StringResult<qsizetype> readStringChunk(char *ptr, qsizetype maxlen);
bool toBool() const { Q_ASSERT(isBool()); return value64 - int(QCborSimpleType::False); }
QCborTag toTag() const { Q_ASSERT(isTag()); return QCborTag(value64); }
quint64 toUnsignedInteger() const { Q_ASSERT(isUnsignedInteger()); return value64; }
QCborNegativeInteger toNegativeInteger() const { Q_ASSERT(isNegativeInteger()); return QCborNegativeInteger(value64 + 1); }
QCborSimpleType toSimpleType() const{ Q_ASSERT(isSimpleType()); return QCborSimpleType(value64); }
qfloat16 toFloat16() const { Q_ASSERT(isFloat16()); return _toFloatingPoint<qfloat16>(); }
float toFloat() const { Q_ASSERT(isFloat()); return _toFloatingPoint<float>(); }
double toDouble() const { Q_ASSERT(isDouble()); return _toFloatingPoint<double>(); }
qint64 toInteger() const
{
Q_ASSERT(isInteger());
qint64 v = qint64(value64);
if (isNegativeInteger())
return -v - 1;
return v;
}
QString readAllString()
{
QString dst;
if (!readAndAppendToString(dst))
dst = QString{};
return dst;
}
QByteArray readAllUtf8String()
{
QByteArray dst;
if (!readAndAppendToUtf8String(dst))
dst = QByteArray{};
return dst;
}
QByteArray readAllByteArray()
{
QByteArray dst;
if (!readAndAppendToByteArray(dst))
dst = QByteArray{};
return dst;
}
private:
void preparse();
bool _enterContainer_helper();
StringResult<QString> _readString_helper();
StringResult<QByteArray> _readUtf8String_helper();
StringResult<QByteArray> _readByteArray_helper();
qsizetype _currentStringChunkSize() const;
bool _readAndAppendToString_helper(QString &);
bool _readAndAppendToUtf8String_helper(QByteArray &);
bool _readAndAppendToByteArray_helper(QByteArray &);
template <typename FP> FP _toFloatingPoint() const noexcept
{
using UIntFP = typename QIntegerForSizeof<FP>::Unsigned;
UIntFP u = UIntFP(value64);
FP f;
memcpy(static_cast<void *>(&f), &u, sizeof(f));
return f;
}
friend QCborStreamReaderPrivate;
friend class QCborContainerPrivate;
quint64 value64;
QScopedPointer<QCborStreamReaderPrivate> d;
quint8 type_;
quint8 reserved[3] = {};
};
QT_END_NAMESPACE
#if defined(QT_X11_DEFINES_FOUND)
# define True 1
# define False 0
#endif
#endif // QCBORSTREAMREADER_H
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