Differential D12746 Diff 68453 kdevplatform/language/duchain/topducontextdynamicdata_p.h

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kdevplatform/language/duchain/topducontextdynamicdata_p.h

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		1		/* This is part of KDevelop
		2		Copyright 2018 R.J.V. Bertin <rjvbertin@gmail.com>
		3
		4		This library is free software; you can redistribute it and/or
		5		modify it under the terms of the GNU Library General Public
		6		License version 2 as published by the Free Software Foundation.
		7
		8		This library is distributed in the hope that it will be useful,
		9		but WITHOUT ANY WARRANTY; without even the implied warranty of
		10		MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		11		Library General Public License for more details.
		12
		13		You should have received a copy of the GNU Library General Public License
		14		along with this library; see the file COPYING.LIB. If not, write to
		15		the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
		16		Boston, MA 02110-1301, USA.
		17		*/
		18
		19		#ifndef KDEVPLATFORM_TOPDUCONTEXTDYNAMICDATA_P_H
		20		#define KDEVPLATFORM_TOPDUCONTEXTDYNAMICDATA_P_H
		21
		22		#include <QByteArray>
		23		#include <QFile>
		24
		25		#include <languageexport.h>
		26
		27		namespace KDevelop {
		28
		29		// #define KDEV_TOPCONTEXTS_USE_FILES
		30
		31		// thin wrapper around QFile, implementing the default TopDUContext
		32		// storage mechanism but also used for migration purposes in the
		33		// database stores.
		34		class KDEVPLATFORMLANGUAGE_EXPORT TopDUContextFile : public QFile
		35		{
		36		public:
		37		TopDUContextFile(uint topContextIndex);
		38		void commit();
		39		static bool exists(uint topContextIndex);
		40		static bool remove(uint topContextIndex);
		41		};
		42
		43		#if !defined(KDEV_TOPCONTEXTS_USE_FILES)
		44		class KDEVPLATFORMLANGUAGE_EXPORT TopDUContextDB
		45		{
		46		public:
		47		virtual ~TopDUContextDB() {};
		48		virtual bool open(QIODevice::OpenMode mode) = 0;
		49		virtual void commit() = 0;
		50		virtual bool flush() = 0;
		51		bool resize(qint64);
		52		qint64 write(const char* data, qint64 len);
		53		qint64 read(char* data, qint64 maxSize);
		54		QByteArray read(qint64 maxSize);
		55		QByteArray readAll();
		56		qint64 pos() const;
		57		bool seek(qint64 pos);
		58		qint64 size();
		59		QString errorString() const;
		60		QString fileName() const;
		61		static bool exists(uint) { return false; };
		62		static bool remove(uint) { return false; };
		63
		64		protected:
		65		bool open(QIODevice::OpenMode mode, const QString &backendName);
		66		virtual bool getCurrentKeyValue() = 0;
		67		virtual bool isValid() = 0;
		68		virtual bool currentKeyExists() = 0;
		69		static bool exists(const QByteArray&) { return false; };
		70		static QByteArray indexKey(uint idx);
		71		static QByteArray indexKey(uint* idx);
		72		bool migrateFromFile();
		73		QByteArray m_currentKey;
		74		uint m_currentIndex;
		75		QByteArray m_currentValue;
		76		qint64 m_currentLen, m_readCursor;
		77		int m_mode;
		78		QString m_errorString;
		79		};
		80
		81		class KDEVPLATFORMLANGUAGE_EXPORT TopDUContextLMDB : public TopDUContextDB
		82		{
		83		public:
		84		typedef union { char bytes; qint32 qint32Ptr; } LZ4Frame;
		85		TopDUContextLMDB(uint topContextIndex);
		86		virtual ~TopDUContextLMDB();
		87		bool open(QIODevice::OpenMode mode) override;
		88		void commit() override;
		89		bool flush() override;
		90		QString fileName() const;
		91		static bool exists(uint topContextIndex);
		92		static bool remove(uint topContextIndex);
		93
		94		protected:
		95		virtual bool getCurrentKeyValue() override;
		96		virtual bool isValid() override;
		97		virtual bool currentKeyExists() override;
		98		static bool exists(const QByteArray& key);
		99		static uint s_DbRefCount;
		100		};
		101		#endif // !KDEV_TOPCONTEXTS_USE_FILES
		102
		103		}
		104		#endif