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Add source code of the XiPC emulator

Pawel Jablonski authored on 17/03/2023 16:46:08
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emu/src/fs.h
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+/*
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+ * Author: Pawel Jablonski
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+ * E-mail: pj@xirx.net
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+ * WWW: xirx.net
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+ * GIT: git.xirx.net
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+ *
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+ * License: You can use this code however you like
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+ * but leave information about the original author.
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+ * Code is free for non-commercial and commercial use.
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+ */
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+
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+#ifndef FS_H
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+#define FS_H
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+
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+#include <QObject>
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+#include <QString>
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+#include <QByteArray>
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+#include <QVector>
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+#include <QFile>
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+#include <QDir>
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+#include <QFileInfoList>
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+#include <QRegularExpression>
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+
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+//! This class contains file system functions
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+class FS : public QObject
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+{
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+	Q_OBJECT
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+
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+	public:
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+		static const int NAME_MAX_LENGTH = 12; //!< Maximum name length of the file
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+
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+		static const int BLOCK_SIZE = 256; //!<  Virtual block size available to address by communication bus between motherboard and CPU
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+
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+		static const int DIR_ENTRY_SIZE = 16; //!< Size of the header with information about file
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+		static const int DIR_SIZE_FIELD_SIZE = 2; //!< Size of the size field in the header
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+		static const int DIR_MAX_QUANTITY = 64; //!< Maximum quantity of files in directory
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+
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+		static const int FILE_MAX_SIZE = 32768; //!< Maximum size of the file
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+
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+		//! This struct contains a name of the file
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+		struct Name
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+		{
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+			QVector<unsigned char> data = QVector<unsigned char>(NAME_MAX_LENGTH + 1); //!< Name of the file
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+		};
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+
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+		//! This struct contains a size of the file
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+		struct Size
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+		{
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+			unsigned char low; //!< Lower byte of the size
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+			unsigned char high; //!< Higher byte of the size
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+		};
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+
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+		//! This struct contains virtual block data
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+		struct Block
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+		{
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+			QVector<unsigned char> data = QVector<unsigned char>(BLOCK_SIZE); //!< Virtual block data
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+		};
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+
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+		FS(QObject *parent = nullptr);
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+
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+		void reset();
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+
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+		void setPath(const QString &path);
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+
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+		bool open(const QString &dirName, const FS::Name &fileName, FS::Size &size);
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+		bool list(const QString &dirName, FS::Size &size);
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+
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+		void readBlock(FS::Block &block, int number);
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+
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+	private:
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+		QString path; //!< Path to the emulated file system on the local disk
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+		QByteArray buffer; //!< Buffer used to loading whole file or a list with description of the files
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+};
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+
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+#endif