Re-wrote a bunch to try to figure out why things weren't working.

Turned out I was reading if a block was compressed exactly opposite. Started to work more on looking up dirs.
2020-11-16 14:56:19 -06:00
parent 06b188d53c
commit 7a2f9a87ba
25 changed files with 504 additions and 3363 deletions
@@ -0,0 +1,125 @@
+package inode
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+//Inode holds an inode. Header is the header that's common for all inodes.
+//
+//Info holds the actual Inode. Due to each inode type being a different type, it's store as an interface{}
+type Inode struct {
+	Header Header
+	Type   int         //Type the inode type defined in the header. Here so it's easy to access
+	Info   interface{} //Info is the parsed specific data. It's type is defined by Type.
+}
+
+//ProcessInode tries to read an inode from the BlockReader
+func ProcessInode(br io.Reader, blockSize uint32) (Inode, error) {
+	var head Header
+	err := binary.Read(br, binary.LittleEndian, &head)
+	if err != nil {
+		return Inode{}, err
+	}
+	var info interface{}
+	switch head.InodeType {
+	case BasicDirectoryType:
+		var inode BasicDirectory
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case BasicFileType:
+		inode, err := NewBasicFile(br, blockSize)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case BasicSymlinkType:
+		inode, err := NewBasicSymlink(br)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case BasicBlockDeviceType:
+		var inode BasicDevice
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case BasicCharDeviceType:
+		var inode BasicDevice
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case BasicFifoType:
+		var inode BasicIPC
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case BasicSocketType:
+		var inode BasicIPC
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtDirType:
+		inode, err := NewExtendedDirectory(br)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtFileType:
+		inode, err := NewExtendedFile(br, blockSize)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtSymlinkType:
+		inode, err := NewExtendedSymlink(br)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtBlockDeviceType:
+		var inode ExtendedDevice
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtCharDeviceType:
+		var inode ExtendedDevice
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtFifoType:
+		var inode ExtendedIPC
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	case ExtSocketType:
+		var inode ExtendedIPC
+		err = binary.Read(br, binary.LittleEndian, &inode)
+		if err != nil {
+			return Inode{}, err
+		}
+		info = inode
+	}
+	return Inode{
+		Type:   int(head.InodeType),
+		Header: head,
+		Info:   info,
+	}, nil
+}