start 380 project5

changes to 380 project 4
changes to 350 project 2

Signed-off-by: Amrit Panesar <apanesar@4195tech.com>

COM380/Project5/GambleKit/Engine/OSSpecific/GkFileSystem.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#include "..\GkDefinitions.h"
+
+#include <fstream>
+#include <string>
+
+enum FileSystemMode
+{
+	FileSystemMode_Physical,
+	FileSystemMode_Virtual
+};
+
+class GKDLLCLASS GkFileSystem
+{
+private:
+	static class GKDLLCLASS Init
+	{
+	public:
+		Init(void);
+		~Init(void);
+	} init;
+
+	static std::wstring source;
+	//static wchar_t *source;
+	static FileSystemMode mode;
+
+	static wchar_t* ReadString(std::ifstream* fileStream);
+
+	static void WriteVirtualFileSystem(const wchar_t* directory, std::ofstream* fileStream);
+
+	static void WriteString(const wchar_t* s, std::ofstream* fileStream);
+	static void WriteFile(const wchar_t* fileName, std::ofstream* fileStream);
+
+	static bool LoadPhysicalFile(const wchar_t *fileName, void **fileData, unsigned int *fileSize);
+	static bool LoadVirtualFile(const wchar_t *fileName, void **fileData, unsigned int *fileSize);
+
+public:
+	GkFileSystem(void);
+	~GkFileSystem(void);
+
+	// Sets the source and mode of the virtual file system. 
+	// If mode is FileSystemMode_Virtual, the source should be the name of the file, containing the virtual file system. Such file can be produced by the CreateVirtualFileSystem method.
+	// If mode is FileSystemMode_Physical, the source can be a root directory for the game's resources. Usually, this root directory is used to create a virtual file system from.
+	static void SetSource(const wchar_t *source, FileSystemMode mode);
+	
+	// Allocates memory in fileData and loads the requested file in it, returning the size of the file in fileSize
+	static bool LoadFile(const wchar_t *fileName, void **fileData, unsigned int *fileSize);
+
+	// Writes the contents of a directory and all its subdirectories into a virtual file with the given name. The file can then be used as a virtual file system file.
+	static void CreateVirtualFileSystem(const wchar_t* directory, const wchar_t* fileName);
+};
+