lca2011: hacky import of tevent.

[ccan-lca-2011.git] / ccan / tevent / tevent_debug.c

diff --git a/ccan/tevent/tevent_debug.c b/ccan/tevent/tevent_debug.c
new file mode 100644 (file)
index 0000000..8df5c75
--- /dev/null
+++ b/ccan/tevent/tevent_debug.c
@@ -0,0 +1,95 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Copyright (C) Andrew Tridgell 2005
+   Copyright (C) Jelmer Vernooij 2005
+
+     ** NOTE! The following LGPL license applies to the tevent
+     ** library. This does NOT imply that all of Samba is released
+     ** under the LGPL
+
+   This 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.
+
+   This 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 this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <ccan/tevent/tevent.h>
+#include <ccan/tevent/tevent_internal.h>
+
+/********************************************************************
+ * Debug wrapper functions, modeled (with lot's of code copied as is)
+ * after the ev debug wrapper functions
+ ********************************************************************/
+
+/*
+  this allows the user to choose their own debug function
+*/
+int tevent_set_debug(struct tevent_context *ev,
+                    void (*debug)(void *context,
+                                  enum tevent_debug_level level,
+                                  const char *fmt,
+                                  va_list ap) PRINTF_FMT(3,0),
+                    void *context)
+{
+       ev->debug_ops.debug = debug;
+       ev->debug_ops.context = context;
+       return 0;
+}
+
+/*
+  debug function for ev_set_debug_stderr
+*/
+static void tevent_debug_stderr(void *private_data,
+                               enum tevent_debug_level level,
+                               const char *fmt,
+                               va_list ap) PRINTF_FMT(3,0);
+static void tevent_debug_stderr(void *private_data,
+                               enum tevent_debug_level level,
+                               const char *fmt, va_list ap)
+{
+       if (level <= TEVENT_DEBUG_WARNING) {
+               vfprintf(stderr, fmt, ap);
+       }
+}
+
+/*
+  convenience function to setup debug messages on stderr
+  messages of level TEVENT_DEBUG_WARNING and higher are printed
+*/
+int tevent_set_debug_stderr(struct tevent_context *ev)
+{
+       return tevent_set_debug(ev, tevent_debug_stderr, ev);
+}
+
+/*
+ * log a message
+ *
+ * The default debug action is to ignore debugging messages.
+ * This is the most appropriate action for a library.
+ * Applications using the library must decide where to
+ * redirect debugging messages
+*/
+void tevent_debug(struct tevent_context *ev, enum tevent_debug_level level,
+                 const char *fmt, ...)
+{
+       va_list ap;
+       if (!ev) {
+               return;
+       }
+       if (ev->debug_ops.debug == NULL) {
+               return;
+       }
+       va_start(ap, fmt);
+       ev->debug_ops.debug(ev->debug_ops.context, level, fmt, ap);
+       va_end(ap);
+}
+