1 files changed, 0 insertions, 86 deletions
diff --git a/internal/state/header.go b/internal/state/header.go
deleted file mode 100644
index 25b1e6af..00000000
--- a/internal/state/header.go
+++ /dev/null
@@ -1,86 +0,0 @@
-package state
-
-import (
-	"encoding/hex"
-	"errors"
-	"io"
-	"os"
-	"strconv"
-	"syscall"
-
-	"hakurei.app/hst"
-)
-
-const (
-	// entryHeaderMagic are magic bytes at the beginning of the state entry file.
-	entryHeaderMagic = "\x00\xff\xca\xfe"
-	// entryHeaderRevision follows entryHeaderMagic and is incremented for revisions of the format.
-	entryHeaderRevision = "\x00\x00"
-	// entryHeaderSize is the fixed size of the header in bytes, including the enablement byte and its complement.
-	entryHeaderSize = len(entryHeaderMagic+entryHeaderRevision) + 2
-)
-
-// entryHeaderEncode encodes a state entry header for a [hst.Enablement] byte.
-func entryHeaderEncode(et hst.Enablement) *[entryHeaderSize]byte {
-	data := [entryHeaderSize]byte([]byte(
-		entryHeaderMagic + entryHeaderRevision + string([]hst.Enablement{et, ^et}),
-	))
-	return &data
-}
-
-// entryHeaderDecode validates a state entry header and returns the [hst.Enablement] byte.
-func entryHeaderDecode(data *[entryHeaderSize]byte) (hst.Enablement, error) {
-	if magic := data[:len(entryHeaderMagic)]; string(magic) != entryHeaderMagic {
-		return 0, errors.New("invalid header " + hex.EncodeToString(magic))
-	}
-	if revision := data[len(entryHeaderMagic):len(entryHeaderMagic+entryHeaderRevision)]; string(revision) != entryHeaderRevision {
-		return 0, errors.New("unexpected revision " + hex.EncodeToString(revision))
-	}
-
-	et := data[len(entryHeaderMagic+entryHeaderRevision)]
-	if et != ^data[len(entryHeaderMagic+entryHeaderRevision)+1] {
-		return 0, errors.New("header enablement value is inconsistent")
-	}
-	return hst.Enablement(et), nil
-}
-
-// EntrySizeError is returned for a file too small to hold a state entry header.
-type EntrySizeError struct {
-	Name string
-	Size int64
-}
-
-func (e *EntrySizeError) Error() string {
-	if e.Name == "" {
-		return "state entry file is too short"
-	}
-	return "state entry file " + strconv.Quote(e.Name) + " is too short"
-}
-
-// entryCheckFile checks whether [os.FileInfo] refers to a file that might hold [hst.State].
-func entryCheckFile(fi os.FileInfo) error {
-	if fi.IsDir() {
-		return syscall.EISDIR
-	}
-	if s := fi.Size(); s <= int64(entryHeaderSize) {
-		return &EntrySizeError{Name: fi.Name(), Size: s}
-	}
-	return nil
-}
-
-// entryReadHeader reads [hst.Enablement] from an [io.Reader].
-func entryReadHeader(r io.Reader) (hst.Enablement, error) {
-	var data [entryHeaderSize]byte
-	if n, err := r.Read(data[:]); err != nil {
-		return 0, err
-	} else if n != entryHeaderSize {
-		return 0, &EntrySizeError{Size: int64(n)}
-	}
-	return entryHeaderDecode(&data)
-}
-
-// entryWriteHeader writes [hst.Enablement] header to an [io.Writer].
-func entryWriteHeader(w io.Writer, et hst.Enablement) error {
-	_, err := w.Write(entryHeaderEncode(et)[:])
-	return err
-}