checkpoint BackupDatAInput / RestoreHelper
diff --git a/libs/utils/BackupHelpers.cpp b/libs/utils/BackupHelpers.cpp
index 4c3e37d..c1d5404 100644
--- a/libs/utils/BackupHelpers.cpp
+++ b/libs/utils/BackupHelpers.cpp
@@ -689,41 +689,27 @@
 
 // hexdump -v -e '"    " 8/1 " 0x%02x," "\n"' data_writer.data
 const unsigned char DATA_GOLDEN_FILE[] = {
-     0x41, 0x70, 0x70, 0x31, 0x0b, 0x00, 0x00, 0x00,
-     0xdd, 0xcc, 0xbb, 0xaa, 0x6e, 0x6f, 0x5f, 0x70,
-     0x61, 0x64, 0x64, 0x69, 0x6e, 0x67, 0x5f, 0x00,
      0x44, 0x61, 0x74, 0x61, 0x0b, 0x00, 0x00, 0x00,
      0x0c, 0x00, 0x00, 0x00, 0x6e, 0x6f, 0x5f, 0x70,
      0x61, 0x64, 0x64, 0x69, 0x6e, 0x67, 0x5f, 0x00,
      0x6e, 0x6f, 0x5f, 0x70, 0x61, 0x64, 0x64, 0x69,
-     0x6e, 0x67, 0x5f, 0x00, 0x41, 0x70, 0x70, 0x31,
-     0x0c, 0x00, 0x00, 0x00, 0xdd, 0xcc, 0xbb, 0xaa,
+     0x6e, 0x67, 0x5f, 0x00, 0x44, 0x61, 0x74, 0x61,
+     0x0c, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00,
      0x70, 0x61, 0x64, 0x64, 0x65, 0x64, 0x5f, 0x74,
      0x6f, 0x5f, 0x5f, 0x33, 0x00, 0xbc, 0xbc, 0xbc,
-     0x44, 0x61, 0x74, 0x61, 0x0c, 0x00, 0x00, 0x00,
-     0x0d, 0x00, 0x00, 0x00, 0x70, 0x61, 0x64, 0x64,
-     0x65, 0x64, 0x5f, 0x74, 0x6f, 0x5f, 0x5f, 0x33,
-     0x00, 0xbc, 0xbc, 0xbc, 0x70, 0x61, 0x64, 0x64,
-     0x65, 0x64, 0x5f, 0x74, 0x6f, 0x5f, 0x5f, 0x33,
-     0x00, 0xbc, 0xbc, 0xbc, 0x41, 0x70, 0x70, 0x31,
-     0x0d, 0x00, 0x00, 0x00, 0xdd, 0xcc, 0xbb, 0xaa,
      0x70, 0x61, 0x64, 0x64, 0x65, 0x64, 0x5f, 0x74,
-     0x6f, 0x5f, 0x32, 0x5f, 0x5f, 0x00, 0xbc, 0xbc,
+     0x6f, 0x5f, 0x5f, 0x33, 0x00, 0xbc, 0xbc, 0xbc,
      0x44, 0x61, 0x74, 0x61, 0x0d, 0x00, 0x00, 0x00,
      0x0e, 0x00, 0x00, 0x00, 0x70, 0x61, 0x64, 0x64,
      0x65, 0x64, 0x5f, 0x74, 0x6f, 0x5f, 0x32, 0x5f,
      0x5f, 0x00, 0xbc, 0xbc, 0x70, 0x61, 0x64, 0x64,
      0x65, 0x64, 0x5f, 0x74, 0x6f, 0x5f, 0x32, 0x5f,
-     0x5f, 0x00, 0xbc, 0xbc, 0x41, 0x70, 0x70, 0x31,
-     0x0a, 0x00, 0x00, 0x00, 0xdd, 0xcc, 0xbb, 0xaa,
-     0x70, 0x61, 0x64, 0x64, 0x65, 0x64, 0x5f, 0x74,
-     0x6f, 0x31, 0x00, 0xbc, 0x44, 0x61, 0x74, 0x61,
+     0x5f, 0x00, 0xbc, 0xbc, 0x44, 0x61, 0x74, 0x61,
      0x0a, 0x00, 0x00, 0x00, 0x0b, 0x00, 0x00, 0x00,
      0x70, 0x61, 0x64, 0x64, 0x65, 0x64, 0x5f, 0x74,
      0x6f, 0x31, 0x00, 0xbc, 0x70, 0x61, 0x64, 0x64,
-     0x65, 0x64, 0x5f, 0x74, 0x6f, 0x31, 0x00, 0xbc,
-     0x46, 0x6f, 0x6f, 0x74, 0x04, 0x00, 0x00, 0x00,
-     0x99, 0x99, 0x77, 0x77
+     0x65, 0x64, 0x5f, 0x74, 0x6f, 0x31, 0x00
+
 };
 const int DATA_GOLDEN_FILE_SIZE = sizeof(DATA_GOLDEN_FILE);
 
@@ -733,12 +719,6 @@
     int err;
     String8 text(str);
 
-    err = writer.WriteAppHeader(text, 0xaabbccdd);
-    if (err != 0) {
-        fprintf(stderr, "WriteAppHeader failed with %s\n", strerror(err));
-        return err;
-    }
-
     err = writer.WriteEntityHeader(text, text.length()+1);
     if (err != 0) {
         fprintf(stderr, "WriteEntityHeader failed with %s\n", strerror(err));
@@ -779,8 +759,6 @@
     err |= test_write_header_and_entity(writer, "padded_to_2__");
     err |= test_write_header_and_entity(writer, "padded_to1");
 
-    writer.WriteAppFooter(0x77779999);
-
     close(fd);
 
     err = compare_file(filename, DATA_GOLDEN_FILE, DATA_GOLDEN_FILE_SIZE);
@@ -800,70 +778,59 @@
     String8 string;
     int cookie = 0x11111111;
     size_t actualSize;
+    bool done;
+    int type;
 
     // printf("\n\n---------- test_read_header_and_entity -- %s\n\n", str);
 
-    err = reader.ReadNextHeader();
+    err = reader.ReadNextHeader(&done, &type);
+    if (done) {
+        fprintf(stderr, "should not be done yet\n");
+        goto finished;
+    }
     if (err != 0) {
         fprintf(stderr, "ReadNextHeader (for app header) failed with %s\n", strerror(err));
-        goto done;
+        goto finished;
     }
-
-    err = reader.ReadAppHeader(&string, &cookie);
-    if (err != 0) {
-        fprintf(stderr, "ReadAppHeader failed with %s\n", strerror(err));
-        goto done;
-    }
-    if (string != str) {
-        fprintf(stderr, "ReadAppHeader expected packageName '%s' got '%s'\n", str, string.string());
+    if (type != BACKUP_HEADER_ENTITY_V1) {
         err = EINVAL;
-        goto done;
-    }
-    if (cookie != (int)0xaabbccdd) {
-        fprintf(stderr, "ReadAppHeader expected cookie 0x%08x got 0x%08x\n", 0xaabbccdd, cookie);
-        err = EINVAL;
-        goto done;
-    }
-
-    err = reader.ReadNextHeader();
-    if (err != 0) {
-        fprintf(stderr, "ReadNextHeader (for entity header) failed with %s\n", strerror(err));
-        goto done;
+        fprintf(stderr, "type=0x%08x expected 0x%08x\n", type, BACKUP_HEADER_ENTITY_V1);
     }
 
     err = reader.ReadEntityHeader(&string, &actualSize);
     if (err != 0) {
         fprintf(stderr, "ReadEntityHeader failed with %s\n", strerror(err));
-        goto done;
+        goto finished;
     }
     if (string != str) {
         fprintf(stderr, "ReadEntityHeader expected key '%s' got '%s'\n", str, string.string());
         err = EINVAL;
-        goto done;
+        goto finished;
     }
     if ((int)actualSize != bufSize) {
         fprintf(stderr, "ReadEntityHeader expected dataSize 0x%08x got 0x%08x\n", bufSize,
                 actualSize);
         err = EINVAL;
-        goto done;
+        goto finished;
     }
 
     err = reader.ReadEntityData(buf, bufSize);
     if (err != NO_ERROR) {
         fprintf(stderr, "ReadEntityData failed with %s\n", strerror(err));
-        goto done;
+        goto finished;
     }
 
     if (0 != memcmp(buf, str, bufSize)) {
         fprintf(stderr, "ReadEntityData expected '%s' but got something starting with "
-                "%02x %02x %02x %02x\n", str, buf[0], buf[1], buf[2], buf[3]);
+                "%02x %02x %02x %02x  '%c%c%c%c'\n", str, buf[0], buf[1], buf[2], buf[3],
+                buf[0], buf[1], buf[2], buf[3]);
         err = EINVAL;
-        goto done;
+        goto finished;
     }
 
     // The next read will confirm whether it got the right amount of data.
 
-done:
+finished:
     if (err != NO_ERROR) {
         fprintf(stderr, "test_read_header_and_entity failed with %s\n", strerror(err));
     }
@@ -923,23 +890,6 @@
         if (err == NO_ERROR) {
             err = test_read_header_and_entity(reader, "padded_to1");
         }
-
-        if (err == NO_ERROR) {
-            err = reader.ReadNextHeader();
-            if (err != 0) {
-                fprintf(stderr, "ReadNextHeader (for app header) failed with %s\n", strerror(err));
-            }
-
-            if (err == NO_ERROR) {
-                int cookie;
-                err |= reader.ReadAppFooter(&cookie);
-                if (cookie != 0x77779999) {
-                    fprintf(stderr, "app footer cookie expected=0x%08x actual=0x%08x\n",
-                        0x77779999, cookie);
-                    err = EINVAL;
-                }
-            }
-        }
     }
 
     close(fd);