first proof of concept on zipped file writer

This DOES NOT work sufficiently well, I just wanted to verify that
zip writing is possible and files are readable. Will be refined
soon.

1 files changed, 119 insertions, 0 deletions

diff --git a/runtime/zlibw.c b/runtime/zlibw.c
new file mode 100644
index 00000000..95ac9138
--- /dev/null
+++ b/runtime/zlibw.c
@@ -0,0 +1,119 @@
+/* The zlibwrap object.
+ *
+ * This is an rsyslog object wrapper around zlib.
+ *
+ * Copyright 2009 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of the rsyslog runtime library.
+ *
+ * The rsyslog runtime library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * The rsyslog runtime library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the rsyslog runtime library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ * A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
+ */
+
+#include "config.h"
+#include <string.h>
+#include <assert.h>
+#include <zlib.h>
+
+#include "rsyslog.h"
+#include "module-template.h"
+#include "obj.h"
+#include "zlibw.h"
+
+MODULE_TYPE_LIB
+
+/* static data */
+DEFobjStaticHelpers
+
+
+/* ------------------------------ methods ------------------------------ */
+
+/* zlib make strong use of macros for its interface functions, so we can not simply
+ * pass function pointers to them. Instead, we create very small wrappers which call
+ * the relevant entry points.
+ */
+
+static int myDeflateInit(z_streamp strm, int level)
+{
+	return deflateInit(strm, level);
+}
+
+static int myDeflate(z_streamp strm, int flush)
+{
+	return deflate(strm, flush);
+}
+
+static int myDeflateEnd(z_streamp strm)
+{
+	return deflateEnd(strm);
+}
+
+
+/* queryInterface function
+ * rgerhards, 2008-03-05
+ */
+BEGINobjQueryInterface(zlibw)
+CODESTARTobjQueryInterface(zlibw)
+	if(pIf->ifVersion != zlibwCURR_IF_VERSION) { /* check for current version, increment on each change */
+		ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
+	}
+
+	/* ok, we have the right interface, so let's fill it
+	 * Please note that we may also do some backwards-compatibility
+	 * work here (if we can support an older interface version - that,
+	 * of course, also affects the "if" above).
+	 */
+	pIf->DeflateInit = myDeflateInit;
+	pIf->Deflate     = myDeflate;
+	pIf->DeflateEnd  = myDeflateEnd;
+finalize_it:
+ENDobjQueryInterface(zlibw)
+
+
+/* Initialize the zlibw class. Must be called as the very first method
+ * before anything else is called inside this class.
+ * rgerhards, 2008-02-19
+ */
+BEGINAbstractObjClassInit(zlibw, 1, OBJ_IS_LOADABLE_MODULE) /* class, version */
+	/* request objects we use */
+
+	/* set our own handlers */
+ENDObjClassInit(zlibw)
+
+
+/* --------------- here now comes the plumbing that makes as a library module --------------- */
+
+
+BEGINmodExit
+CODESTARTmodExit
+ENDmodExit
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_LIB_QUERIES
+ENDqueryEtryPt
+
+
+BEGINmodInit()
+CODESTARTmodInit
+	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
+
+	CHKiRet(zlibwClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
+	/* Initialize all classes that are in our module - this includes ourselfs */
+ENDmodInit
+/* vi:set ai:
+ */