Add search function to libtar

 Function entryExists() can be called in order
 to check if an entry exists inside an archive.

Change-Id: Id3d13d20dfb74a1779dbd8ba6f0ab08c3ca46319
diff --git a/twrpTar.hpp b/twrpTar.hpp
index 427e6d1..3ee6028 100644
--- a/twrpTar.hpp
+++ b/twrpTar.hpp
@@ -38,6 +38,7 @@
                 int addFilesToExistingTar(vector <string> files, string tarFile);
 		int createTar();
 		int addFile(string fn, bool include_root);
+		int entryExists(string entry);
 		int closeTar(bool gzip);
 		int createTarGZFork();
 		int createTarFork();
@@ -59,6 +60,7 @@
 		int has_data_media;
 		int Archive_File_Count;
 		unsigned long long Archive_Current_Size;
+		int getArchiveType(); // 1 for compressed - 0 for uncompressed
 		TAR *t;
 		FILE* p;
 		int fd;