packer: Add length field to data descriptor

Signed-off-by: Chloe M. <chloe@faracom.org>

1 files changed, 10 insertions, 4 deletions

diff --git a/core/rdar.c b/core/rdar.c
index 7cd53ef..2f7cea8 100644
--- a/core/rdar.c
+++ b/core/rdar.c
@@ -87,16 +87,18 @@ struct file_view {
  * file along with an offset to which it is located at
  * in the offset.
  *
- * @magic: Format magic
- * @path:  File path
- * @off:   File data offset
- * @flags: File flags
+ * @magic:  Format magic
+ * @path:   File path
+ * @off:    File data offset
+ * @flags:  File flags
+ * @length: File length in bytes
  */
 struct data_desc {
     char magic[RDAR_MAGIC_LEN];
     char path[RDAR_MAX_PATHLEN];
     off_t off;
     uint16_t flags;
+    size_t length;
 };
 
 /*
@@ -248,12 +250,15 @@ static int
 idata_push_root(void)
 {
     struct idata_desc *root;
+    struct data_desc *desc;
 
     root = idata_from_file("%root%", true);
     if (root == NULL) {
         return -1;
     }
 
+    desc = &root->data;
+    desc->length = sizeof(struct root_data_region);
     IDATA_PUSH(root);
     return 0;
 }
@@ -320,6 +325,7 @@ idata_table_flush(void)
         }
 
         d_desc->off = lseek(fd, 0, SEEK_CUR);
+        d_desc->length = view->length;
         write(fd, view->data, view->length);
     }