From 2e2693d1ea64eaca8e3e358bfd627c2483f580b8 Mon Sep 17 00:00:00 2001
From: Nigel <nigelbarink@hotmail.com>
Date: Tue, 15 Mar 2022 21:56:32 +0100
Subject: [PATCH] Build some structures will need for the virtual filesystem

---
 .../EXT2/SuperBlock.h                         |  0
 .../FAT/BiosParameterBlock.h                  |  0
 .../FAT/DirectoryEntry.h                      |  0
 .../FAT/ExtendBootRecord.h                    |  0
 src/kernel/kernel.h                           |  6 +--
 src/kernel/vfs/File.h                         |  9 ++++
 src/kernel/vfs/VFS.cpp                        | 50 +++++++++++++++++++
 src/kernel/vfs/VFS.h                          | 29 +++++++++++
 8 files changed, 91 insertions(+), 3 deletions(-)
 rename src/kernel/{filesytems => filesystems}/EXT2/SuperBlock.h (100%)
 rename src/kernel/{filesytems => filesystems}/FAT/BiosParameterBlock.h (100%)
 rename src/kernel/{filesytems => filesystems}/FAT/DirectoryEntry.h (100%)
 rename src/kernel/{filesytems => filesystems}/FAT/ExtendBootRecord.h (100%)
 create mode 100644 src/kernel/vfs/File.h
 create mode 100644 src/kernel/vfs/VFS.cpp
 create mode 100644 src/kernel/vfs/VFS.h

diff --git a/src/kernel/filesytems/EXT2/SuperBlock.h b/src/kernel/filesystems/EXT2/SuperBlock.h
similarity index 100%
rename from src/kernel/filesytems/EXT2/SuperBlock.h
rename to src/kernel/filesystems/EXT2/SuperBlock.h
diff --git a/src/kernel/filesytems/FAT/BiosParameterBlock.h b/src/kernel/filesystems/FAT/BiosParameterBlock.h
similarity index 100%
rename from src/kernel/filesytems/FAT/BiosParameterBlock.h
rename to src/kernel/filesystems/FAT/BiosParameterBlock.h
diff --git a/src/kernel/filesytems/FAT/DirectoryEntry.h b/src/kernel/filesystems/FAT/DirectoryEntry.h
similarity index 100%
rename from src/kernel/filesytems/FAT/DirectoryEntry.h
rename to src/kernel/filesystems/FAT/DirectoryEntry.h
diff --git a/src/kernel/filesytems/FAT/ExtendBootRecord.h b/src/kernel/filesystems/FAT/ExtendBootRecord.h
similarity index 100%
rename from src/kernel/filesytems/FAT/ExtendBootRecord.h
rename to src/kernel/filesystems/FAT/ExtendBootRecord.h
diff --git a/src/kernel/kernel.h b/src/kernel/kernel.h
index 26f6fa5..ac164a3 100644
--- a/src/kernel/kernel.h
+++ b/src/kernel/kernel.h
@@ -28,9 +28,9 @@ extern "C"
 #include "ide/ide.h"
 #include "./drivers/IO/ata/ataDevice.h"
 #include "./PartitionTable/MBR/MasterBootRecord.h"
-#include "./filesytems/FAT/BiosParameterBlock.h"
-#include "./filesytems/FAT/ExtendBootRecord.h"
-#include "./filesytems/FAT/DirectoryEntry.h"
+#include "./filesystems/FAT/BiosParameterBlock.h"
+#include "./filesystems/FAT/ExtendBootRecord.h"
+#include "./filesystems/FAT/DirectoryEntry.h"
 #include "drivers/ACPI/rsdp.h"
 
 
diff --git a/src/kernel/vfs/File.h b/src/kernel/vfs/File.h
new file mode 100644
index 0000000..5a76c48
--- /dev/null
+++ b/src/kernel/vfs/File.h
@@ -0,0 +1,9 @@
+#pragma once
+
+class File {
+
+public:
+    virtual const File* Open () const ; // TODO: figure out a proper return value 
+    virtual const char* Read() const;
+    virtual void Write();
+};
diff --git a/src/kernel/vfs/VFS.cpp b/src/kernel/vfs/VFS.cpp
new file mode 100644
index 0000000..8eca77a
--- /dev/null
+++ b/src/kernel/vfs/VFS.cpp
@@ -0,0 +1,50 @@
+#include "VFS.h"
+/*
+ * TODO: Implement this!!
+ * 
+ */
+
+
+
+void VirtualFileSystem::Initialize(FS* root)
+{
+    root = root;
+}
+
+void VirtualFileSystem::Open(const char* path)
+{
+    /*
+        What does this mean?
+        1. Parse the path string 
+        2. Traverse the graph (Finding the correct Node)
+        3. Create some kind of open file pointer thingy
+    */
+}
+
+void VirtualFileSystem::Read()
+{
+    // NOTE: we need some way to know what file we wish to read from 
+}
+
+void VirtualFileSystem::Write()
+{
+   // NOTE: we need some way to know what file we wish to write to 
+}
+
+void VirtualFileSystem::Mount(const char* path, FS* FileSystem)
+{
+    /*
+        What does this mean?
+        1. Parse the path string
+        2. Add a node to our internal graph 
+    */
+}
+
+void VirtualFileSystem::UnMount(FS* FileSystem)
+{
+ /*
+        What does this mean?
+        1. Parse the path string
+        2. Remve a node to our internal graph 
+    */
+}
\ No newline at end of file
diff --git a/src/kernel/vfs/VFS.h b/src/kernel/vfs/VFS.h
new file mode 100644
index 0000000..b525cc2
--- /dev/null
+++ b/src/kernel/vfs/VFS.h
@@ -0,0 +1,29 @@
+#pragma once
+
+class VirtualFileSystem{
+public: 
+    void Initialize( FS* root);
+    void Open (const char* path);
+    void Read();
+    void Write();
+
+    void Mount(const char* path,FS* FileSystem);
+    void UnMount(FS* FileSystem);
+
+private:
+    FS* root;
+
+
+};
+
+struct FS
+{
+    const char* name ;
+    int DeviceID;
+    int ManufacturerID;
+    FS* next;
+    char**(Read)();
+    void*(Write)();
+    void*(Open)();
+};
+