1 files changed, 18 insertions, 1 deletions
diff --git a/src/cc4group.c b/src/cc4group.c
index f257d6b..a664fe3 100644
--- a/src/cc4group.c
+++ b/src/cc4group.c
@@ -483,7 +483,24 @@ static bool cc4group_inflateFillOutput(z_stream* const strm, CC4Group_ReadCallba
 	}
 
 	*inflateRet = ret;
-	return ret == Z_OK || (ret == Z_STREAM_END && strm->avail_in == 0 && eof);
+	if(ret == Z_OK)
+	{
+		return true;
+	}
+
+
+	if(ret == Z_STREAM_END && strm->avail_in == 0)
+	{
+		// the input should have really ended now
+		// but some callbacks may need to be called again to return EOF
+		if(!*eof)
+		{
+			size_t readSize = 0;
+			*eof = callback((const void**)lastData, &readSize, callbackArg);
+		}
+		return *eof;
+	}
+	return false;
 }
 
 static bool cc4group_uncompressGroup(CC4Group* const this, CC4Group_ReadCallback const readCallback, void* const callbackArg, int const memoryManagement, CC4Group_ReadSetupCallback const initCallback, CC4Group_ReadSetupCallback const deinitCallback)