main/pbx: Move switch routines to pbx_switch.c.

This is the fifth patch in a series meant to reduce the bulk of pbx.c.
This moves ast_switch functions to their own source.

Change-Id: Ic2592a18a5c4d8a3c2dcf9786c9a6f650a8c628e

1 files changed, 133 insertions, 0 deletions

diff --git a/main/pbx_switch.c b/main/pbx_switch.c
new file mode 100644
index 000000000..bf733aed5
--- /dev/null
+++ b/main/pbx_switch.c
@@ -0,0 +1,133 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2016, CFWare, LLC
+ *
+ * Corey Farrell <git@cfware.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief PBX switch routines.
+ *
+ * \author Corey Farrell <git@cfware.com>
+ */
+
+/*** MODULEINFO
+	<support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_REGISTER_FILE()
+
+#include "asterisk/_private.h"
+#include "asterisk/cli.h"
+#include "asterisk/linkedlists.h"
+#include "asterisk/pbx.h"
+#include "pbx_private.h"
+
+static AST_RWLIST_HEAD_STATIC(switches, ast_switch);
+
+struct ast_switch *pbx_findswitch(const char *sw)
+{
+	struct ast_switch *asw;
+
+	AST_RWLIST_RDLOCK(&switches);
+	AST_RWLIST_TRAVERSE(&switches, asw, list) {
+		if (!strcasecmp(asw->name, sw))
+			break;
+	}
+	AST_RWLIST_UNLOCK(&switches);
+
+	return asw;
+}
+
+/*
+ * Append to the list. We don't have a tail pointer because we need
+ * to scan the list anyways to check for duplicates during insertion.
+ */
+int ast_register_switch(struct ast_switch *sw)
+{
+	struct ast_switch *tmp;
+
+	AST_RWLIST_WRLOCK(&switches);
+	AST_RWLIST_TRAVERSE(&switches, tmp, list) {
+		if (!strcasecmp(tmp->name, sw->name)) {
+			AST_RWLIST_UNLOCK(&switches);
+			ast_log(LOG_WARNING, "Switch '%s' already found\n", sw->name);
+			return -1;
+		}
+	}
+	AST_RWLIST_INSERT_TAIL(&switches, sw, list);
+	AST_RWLIST_UNLOCK(&switches);
+
+	return 0;
+}
+
+void ast_unregister_switch(struct ast_switch *sw)
+{
+	AST_RWLIST_WRLOCK(&switches);
+	AST_RWLIST_REMOVE(&switches, sw, list);
+	AST_RWLIST_UNLOCK(&switches);
+}
+
+/*! \brief  handle_show_switches: CLI support for listing registered dial plan switches */
+static char *handle_show_switches(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
+{
+	struct ast_switch *sw;
+
+	switch (cmd) {
+	case CLI_INIT:
+		e->command = "core show switches";
+		e->usage =
+			"Usage: core show switches\n"
+			"       List registered switches\n";
+		return NULL;
+	case CLI_GENERATE:
+		return NULL;
+	}
+
+	AST_RWLIST_RDLOCK(&switches);
+
+	if (AST_RWLIST_EMPTY(&switches)) {
+		AST_RWLIST_UNLOCK(&switches);
+		ast_cli(a->fd, "There are no registered alternative switches\n");
+		return CLI_SUCCESS;
+	}
+
+	ast_cli(a->fd, "\n    -= Registered Asterisk Alternative Switches =-\n");
+	AST_RWLIST_TRAVERSE(&switches, sw, list)
+		ast_cli(a->fd, "%s: %s\n", sw->name, sw->description);
+
+	AST_RWLIST_UNLOCK(&switches);
+
+	return CLI_SUCCESS;
+}
+
+static struct ast_cli_entry sw_cli[] = {
+	AST_CLI_DEFINE(handle_show_switches, "Show alternative switches"),
+};
+
+static void unload_pbx_switch(void)
+{
+	ast_cli_unregister_multiple(sw_cli, ARRAY_LEN(sw_cli));
+}
+
+int load_pbx_switch(void)
+{
+	ast_cli_register_multiple(sw_cli, ARRAY_LEN(sw_cli));
+	ast_register_cleanup(unload_pbx_switch);
+
+	return 0;
+}