Start of a file map disk driver for the bootloader.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26911 a95241bf-73f2-0310-859d-f6bbb57e9c96
2008-08-10 01:24:01 +00:00
parent 2fc2b436d2
commit 0bdaf02821
3 changed files with 220 additions and 0 deletions
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2008, François Revol <[email protected]>.
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+
+#ifndef _BOOT_FILE_MAP_DISK_H
+#define _BOOT_FILE_MAP_DISK_H
+
+#include <boot/vfs.h>
+#include <boot/partitions.h>
+
+#define FMAP_FOLDER_NAME "BEOS"
+#define FMAP_IMAGE_NAME "IMAGE.BE"
+//#define FMAP_FOLDER_NAME "HAIKU"
+//#define FMAP_IMAGE_NAME "IMAGE.BFS"
+
+#define FMAP_MAX_RUNS 128
+
+struct file_map_run {
+	off_t offset;
+	off_t block;
+	off_t len;
+};
+
+class FileMap {
+public:
+	FileMap();
+	~FileMap();
+	void AddRun(off_t offset, off_t block, off_t len);
+
+private:
+	struct file_map_run fRuns[FMAP_MAX_RUNS];
+};
+
+class FileMapDisk : public Node {
+	public:
+		FileMapDisk();
+		virtual ~FileMapDisk();
+
+		status_t Init(Node *node/*Partition *partition, FileMap *map, off_t imageSize*/);
+
+		virtual status_t Open(void **_cookie, int mode);
+		virtual status_t Close(void *cookie);
+
+
+		virtual ssize_t ReadAt(void *cookie, off_t pos, void *buffer,
+			size_t bufferSize);
+		virtual ssize_t WriteAt(void *cookie, off_t pos, const void *buffer,
+			size_t bufferSize);
+
+		virtual status_t GetName(char *nameBuffer, size_t bufferSize) const;
+		virtual off_t Size() const;
+
+		status_t GetFileMap(FileMap **map);
+
+		static FileMapDisk *FindAnyFileMapDisk(Directory *volume);
+
+	private:
+		Node		*fNode;
+		/*
+		Partition	*fPartition;
+		FileMap		*fMap;
+		off_t		fImageSize;
+		*/
+	
+};
+
+#endif	// _BOOT_FILE_MAP_DISK_H