Restructure for 1.16 io/fs interface

direntry_fileinfo.go

@@ -0,0 +1,126 @@
+package squashfs
+
+import (
+	"io"
+	"io/fs"
+	"time"
+
+	"github.com/CalebQ42/squashfs/internal/directory"
+	"github.com/CalebQ42/squashfs/internal/inode"
+)
+
+type DirEntry struct {
+	en     *directory.Entry
+	parent *FS
+	r      *Reader
+}
+
+func (r *Reader) newDirEntry(en *directory.Entry, parent *FS) *DirEntry {
+	return &DirEntry{
+		en:     en,
+		parent: parent,
+		r:      r,
+	}
+}
+
+func (d DirEntry) Name() string {
+	return d.en.Name
+}
+
+func (d DirEntry) IsDir() bool {
+	return d.en.Type == inode.DirType
+}
+
+func (d DirEntry) Type() fs.FileMode {
+	switch d.en.Type {
+	case inode.DirType:
+		return fs.ModeDir
+	case inode.SymType:
+		return fs.ModeSymlink
+	default:
+		return 0
+	}
+}
+
+func (d DirEntry) Info() (fs.FileInfo, error) {
+	in, err := d.r.getInodeFromEntry(d.en)
+	if err != nil {
+		return nil, err
+	}
+	return &FileInfo{
+		name:   d.en.Name,
+		i:      in,
+		parent: d.parent,
+		r:      d.r,
+	}, nil
+}
+
+//GetInodeFromEntry returns the inode associated with a given directory.Entry
+func (r *Reader) getInodeFromEntry(en *directory.Entry) (*inode.Inode, error) {
+	br, err := r.newMetadataReader(int64(r.super.InodeTableStart + uint64(en.InodeOffset)))
+	if err != nil {
+		return nil, err
+	}
+	_, err = br.Seek(int64(en.InodeBlockOffset), io.SeekStart)
+	if err != nil {
+		return nil, err
+	}
+	i, err := inode.ProcessInode(br, r.super.BlockSize)
+	if err != nil {
+		return nil, err
+	}
+	return i, nil
+}
+
+type FileInfo struct {
+	i      *inode.Inode
+	parent *FS
+	r      *Reader
+	name   string
+}
+
+func (f FileInfo) Name() string {
+	return f.name
+}
+
+func (f FileInfo) Size() int64 {
+	switch f.i.Type {
+	case inode.FileType:
+		return int64(f.i.Info.(inode.File).Size)
+	case inode.ExtFileType:
+		return int64(f.i.Info.(inode.ExtFile).Size)
+	}
+	return 0
+}
+
+func (f FileInfo) Mode() fs.FileMode {
+	mode := fs.FileMode(f.i.Permissions)
+	switch f.i.Type {
+	case inode.DirType | inode.ExtDirType:
+		return mode | fs.ModeDir
+	case inode.ExtDirType:
+		return mode | fs.ModeDir
+	case inode.SymType:
+		return mode | fs.ModeSymlink
+	case inode.ExtSymType:
+		return mode | fs.ModeSymlink
+	}
+	return mode
+}
+
+func (f FileInfo) ModTime() time.Time {
+	return time.Unix(int64(f.i.ModifiedTime), 0)
+}
+
+func (f FileInfo) IsDir() bool {
+	return f.i.Type == inode.DirType || f.i.Type == inode.ExtDirType
+}
+
+func (f FileInfo) Sys() interface{} {
+	return &File{
+		name:   f.name,
+		i:      f.i,
+		r:      f.r,
+		parent: f.parent,
+	}
+}