From c238e8ea86ee540a988bd96bfa52269c65aae92d Mon Sep 17 00:00:00 2001
From: Martin Willi <martin@revosec.ch>
Date: Fri, 29 Apr 2011 13:49:24 +0200
Subject: [PATCH] Added an equals function to backtrace_t

---
 src/libstrongswan/utils/backtrace.c | 25 +++++++++++++++++++++++++
 src/libstrongswan/utils/backtrace.h |  8 ++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/libstrongswan/utils/backtrace.c b/src/libstrongswan/utils/backtrace.c
index 3f3707b5a..f69bd1538 100644
--- a/src/libstrongswan/utils/backtrace.c
+++ b/src/libstrongswan/utils/backtrace.c
@@ -152,6 +152,30 @@ METHOD(backtrace_t, contains_function, bool,
 	return FALSE;
 }
 
+METHOD(backtrace_t, equals, bool,
+	private_backtrace_t *this, backtrace_t *other_public)
+{
+	private_backtrace_t *other = (private_backtrace_t*)other_public;
+	int i;
+
+	if (this == other)
+	{
+		return TRUE;
+	}
+	if (this->frame_count != other->frame_count)
+	{
+		return FALSE;
+	}
+	for (i = 0; i < this->frame_count; i++)
+	{
+		if (this->frames[i] != other->frames[i])
+		{
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
+
 METHOD(backtrace_t, destroy, void,
 	private_backtrace_t *this)
 {
@@ -178,6 +202,7 @@ backtrace_t *backtrace_create(int skip)
 	this->public = (backtrace_t) {
 		.log = _log_,
 		.contains_function = _contains_function,
+		.equals = _equals,
 		.destroy = _destroy,
 	};
 
diff --git a/src/libstrongswan/utils/backtrace.h b/src/libstrongswan/utils/backtrace.h
index e8ccfc1bd..cf4d27770 100644
--- a/src/libstrongswan/utils/backtrace.h
+++ b/src/libstrongswan/utils/backtrace.h
@@ -49,6 +49,14 @@ struct backtrace_t {
 	 */
 	bool (*contains_function)(backtrace_t *this, char *function[], int count);
 
+	/**
+	 * Check two backtraces for equality.
+	 *
+	 * @param other	backtrace to compare to this
+	 * @return		TRUE if backtraces are equal
+	 */
+	bool (*equals)(backtrace_t *this, backtrace_t *other);
+
 	/**
 	 * Destroy a backtrace instance.
 	 */