Adds gz_iszipped() function.

2 files changed, 17 insertions, 1 deletions

diff --git a/lib/libz/gzio.c b/lib/libz/gzio.c
index 7af63495ce5..8a2b770252d 100644
--- a/lib/libz/gzio.c
+++ b/lib/libz/gzio.c
@@ -3,7 +3,7 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
-/* $Id: gzio.c,v 1.1 1996/07/27 02:39:45 tholo Exp $ */
+/* $Id: gzio.c,v 1.2 1996/10/27 00:29:33 millert Exp $ */
 
 #include <stdio.h>
 
@@ -521,3 +521,14 @@ char*  gzerror (file, errnum)
     strcat(s->msg, m);
     return s->msg;
 }
+
+/* ===========================================================================
+     Returns true (1) if file is zipped, else returns false (0).
+*/
+int  gz_iszipped (file)
+    gzFile file;
+{
+    gz_stream *s = (gz_stream*)file;
+
+    return(!(s->transparent));
+}
diff --git a/lib/libz/zlib.h b/lib/libz/zlib.h
index 6a9e5d57475..32109747f82 100644
--- a/lib/libz/zlib.h
+++ b/lib/libz/zlib.h
@@ -701,6 +701,11 @@ extern char EXPORT  *gzerror OF((gzFile file, int *errnum));
    to get the exact error code.
 */
 
+/* ===========================================================================
+     Returns true (1) if file is zipped, else returns false (0).              
+*/
+extern int  gz_iszipped OF((gzFile file));
+
                         /* checksum functions */
 
 /*