file_seek() used to be a wrapper around fseek() or gzseek(), both of

which could use lseek() and were thus expensive due to system call
overhead.  To avoid making a system call for every packet on a
sequential read, we maintained a data_offset field in the wtap structure
for sequential reads.

It's now a routine that just returns information from the FILE_T data
structure, so it's cheap.  Use it, rather than maintaining the data_offset
field.

Readers for some file formats need to maintain file offset themselves;
have them do so in their private data structures.

svn path=/trunk/; revision=42423

1 files changed, 0 insertions, 2 deletions

diff --git a/wiretap/wtap-int.h b/wiretap/wtap-int.h
index a6feab666b..94868b309c 100644
--- a/wiretap/wtap-int.h
+++ b/wiretap/wtap-int.h
@@ -59,8 +59,6 @@ struct wtap {
     GArray                      *interface_data;        /**< An array holding the interface data from pcapng IDB:s or equivalent(?)*/
     union wtap_pseudo_header    pseudo_header;
 
-    gint64                      data_offset;
-
     void                        *priv;
 
     subtype_read_func           subtype_read;