add unflatenc and unchunkify

1 files changed, 15 insertions, 2 deletions

diff --git a/main.go b/main.go
index ddc9782..99239b7 100644
--- a/main.go
+++ b/main.go
@@ -215,6 +215,19 @@ func chunkify(root, name string, data, key []byte) error {
 	return flatenc(root, name, index, key)
 }
 
+func unchunkify(root, name string, single bool, key []byte) ([]byte, error) {
+	d, err := unflatenc(root, name, key)
+	if single || err != nil {
+		return d, err
+	}
+	sums := split(d, 32)
+	raw := []byte{}
+	for _, sum := range sums {
+		log.Printf("sum %x\n", sum)
+	}
+	return raw, nil
+}
+
 func flatenc(root, name string, data, key []byte) error {
 	// Flatten data.
 	var buf bytes.Buffer
@@ -246,7 +259,7 @@ func flatenc(root, name string, data, key []byte) error {
 	return writeCksumFile(filepath.Join(root, ".bb", "chunks"), name, append(iv, enc...))
 }
 
-func unflatenc(root, name string, key []byte) (raw []byte, err error) {
+func unflatenc(root, name string, key []byte) ([]byte, error) {
 	enc, err := os.ReadFile(filepath.Join(root, ".bb", "chunks", name[:2], name[2:]))
 	if err != nil {
 		return nil, err
@@ -302,7 +315,7 @@ func main() {
 		if err != nil {
 			log.Fatal(err)
 		}
-		d, err := unflatenc(wd, *rfile, key)
+		d, err := unchunkify(wd, *rfile, false, key)
 		log.Println("d", err, string(d))
 		// log.Printf("d: %d %v %x\n", len(d), err, d)
 		return