(find_next_conf_no): New function.

(find_previous_conf_no): New function.

src/include/services.h

 /*
- * $Id: services.h,v 0.63 2003/08/12 22:32:51 ceder Exp $
+ * $Id: services.h,v 0.64 2003/08/13 10:28:23 ceder Exp $
  * Copyright (C) 1991-1999, 2001-2002  Lysator Academic Computer Association.
  *
  * This file is part of the LysKOM server.
@@ -409,6 +409,15 @@ set_keep_commented(Conf_no	conf_no,
 extern Success
 first_unused_conf_no(Conf_no *result);
 
+/*
+ * Return next/previous existing text-no.
+ */
+
+extern  Success
+find_next_conf_no(Conf_no start, Conf_no *result);
+
+extern  Success
+find_previous_conf_no(Conf_no start, Conf_no *result);
 
 /********************************
 *     Calls to handle marks     *

src/server/conference.c

 /*
- * $Id: conference.c,v 0.85 2003/08/12 22:32:37 ceder Exp $
+ * $Id: conference.c,v 0.86 2003/08/13 10:28:20 ceder Exp $
  * Copyright (C) 1991-2002  Lysator Academic Computer Association.
  *
  * This file is part of the LysKOM server.
@@ -1536,3 +1536,50 @@ first_unused_conf_no(Conf_no *result)
     *result = query_next_conf_no();
     return OK;
 }
+
+Success
+find_next_conf_no(Conf_no start,
+		  Conf_no *result)
+{
+    Conf_no    highest = query_next_conf_no();
+
+    CHK_CONNECTION(FAILURE);
+    CHK_LOGIN(FAILURE);
+    err_stat = start;
+    while (++start < highest)
+	if (has_access(start, active_connection, read_protected))
+	{
+	    *result = start;
+	    return OK;
+	}
+
+    kom_errno = KOM_UNDEF_CONF;
+    return FAILURE;
+}
+
+
+extern  Success
+find_previous_conf_no(Conf_no start,
+		      Conf_no *result)
+{
+    Conf_no next_cno;
+    const Conf_no saved_start = start;
+    
+    CHK_CONNECTION(FAILURE);
+    CHK_LOGIN(FAILURE);
+    
+    if (start > (next_cno = query_next_conf_no()))
+	start = next_cno;
+
+    while (start-- > 0)
+	if (has_access(start, active_connection, read_protected))
+	{
+	    *result = start;
+	    return OK;
+	}
+
+    kom_errno = KOM_UNDEF_CONF;
+    err_stat = saved_start;
+    return FAILURE;
+}
+