Move changes from exp2 to main

This is largely a move to simplify a lot of the readers
Also further breaks out functions.

internal/inode/file.go

@@ -0,0 +1,54 @@
+package inode
+
+import (
+	"encoding/binary"
+	"io"
+	"math"
+)
+
+type fileInit struct {
+	BlockStart uint32
+	FragInd    uint32
+	Offset     uint32
+	Size       uint32
+}
+
+type File struct {
+	fileInit
+	BlockSizes []uint32
+}
+
+type eFileInit struct {
+	BlockStart uint32
+	Size       uint64
+	Sparse     uint64
+	LinkCount  uint32
+	FragInd    uint32
+	Offset     uint32
+	XattrInd   uint32
+}
+
+type EFile struct {
+	eFileInit
+	BlockSizes []uint32
+}
+
+func ReadFile(r io.Reader, blockSize uint32) (f File, err error) {
+	err = binary.Read(r, binary.LittleEndian, &f.fileInit)
+	if err != nil {
+		return
+	}
+	f.BlockSizes = make([]uint32, int(math.Ceil(float64(f.Size)/float64(blockSize))))
+	err = binary.Read(r, binary.LittleEndian, &f.BlockSizes)
+	return
+}
+
+func ReadEFile(r io.Reader, blockSize uint32) (f EFile, err error) {
+	err = binary.Read(r, binary.LittleEndian, &f.eFileInit)
+	if err != nil {
+		return
+	}
+	f.BlockSizes = make([]uint32, int(math.Ceil(float64(f.Size)/float64(blockSize))))
+	err = binary.Read(r, binary.LittleEndian, &f.BlockSizes)
+	return
+}