From 8d8452b419de5fcab20af4a5eeebb0dfb8898af5 Mon Sep 17 00:00:00 2001
From: Stephen Fisher <steve@stephen-fisher.com>
Date: Tue, 6 Mar 2007 00:35:35 +0000
Subject: Introduce a new function called have_tap_listener(int tap_id) to tell
 if a specific tap id is currently listening for data. This complements the
 function have_tap_listeners(), which checks to see if any tap is currently
 listening.

svn path=/trunk/; revision=20979
---
 epan/tap.c | 16 ++++++++++++++++
 epan/tap.h |  1 +
 2 files changed, 17 insertions(+)

diff --git a/epan/tap.c b/epan/tap.c
index ada6275a2d..c57196b33b 100644
--- a/epan/tap.c
+++ b/epan/tap.c
@@ -460,3 +460,19 @@ have_tap_listeners(void)
 {
 	return tap_listener_queue != NULL;
 }
+
+/* Returns TRUE there is an active tap listener for the specified tap id. */
+gboolean
+have_tap_listener(int tap_id)
+{
+	volatile tap_listener_t *tap_queue = tap_listener_queue;
+
+	while(tap_queue) {
+		if(tap_queue->tap_id == tap_id)
+			return TRUE;
+
+		tap_queue = tap_queue->next;
+	}
+
+	return FALSE;
+}
diff --git a/epan/tap.h b/epan/tap.h
index d24c3d72f1..9e50c65eef 100644
--- a/epan/tap.h
+++ b/epan/tap.h
@@ -50,6 +50,7 @@ extern GString *register_tap_listener(const char *tapname, void *tapdata,
     tap_draw_cb tap_draw);
 extern void remove_tap_listener(void *tapdata);
 extern gboolean have_tap_listeners(void);
+extern gboolean have_tap_listener(int tap_id);
 extern const void *fetch_tapped_data(int tap_id, int idx);
 
 #endif
-- 
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