- put the entire filesystem code into a namespace and created some subdirectories.

src/common/filesystem/source/fs_stringpool.h

@@ -0,0 +1,29 @@
+#pragma once
+
+namespace FileSys {
+// Storage for all the static strings the file system must hold.
+class StringPool
+{
+	// do not allow externally defining this.
+	friend class FileSystem;
+	friend class FResourceFile;
+private:
+	StringPool(size_t blocksize = 10*1024) : TopBlock(nullptr), FreeBlocks(nullptr), BlockSize(blocksize) {}
+public:
+	~StringPool();
+	const char* Strdup(const char*);
+
+protected:
+	struct Block;
+
+	Block *AddBlock(size_t size);
+	void *iAlloc(size_t size);
+
+	Block *TopBlock;
+	Block *FreeBlocks;
+	size_t BlockSize;
+public:
+	bool shared;
+};
+
+}