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-rw-r--r--1.4.23-rc4/funcs/func_logic.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/1.4.23-rc4/funcs/func_logic.c b/1.4.23-rc4/funcs/func_logic.c
new file mode 100644
index 000000000..ef972c969
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+++ b/1.4.23-rc4/funcs/func_logic.c
@@ -0,0 +1,214 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2006, Digium, Inc.
+ * Portions Copyright (C) 2005, Anthony Minessale II
+ *
+ * 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 Conditional logic dialplan functions
+ *
+ * \author Anthony Minessale II
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "asterisk/module.h"
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/logger.h"
+#include "asterisk/utils.h"
+#include "asterisk/app.h"
+
+static int isnull(struct ast_channel *chan, char *cmd, char *data,
+ char *buf, size_t len)
+{
+ strcpy(buf, data && *data ? "0" : "1");
+
+ return 0;
+}
+
+static int exists(struct ast_channel *chan, char *cmd, char *data, char *buf,
+ size_t len)
+{
+ strcpy(buf, data && *data ? "1" : "0");
+
+ return 0;
+}
+
+static int iftime(struct ast_channel *chan, char *cmd, char *data, char *buf,
+ size_t len)
+{
+ struct ast_timing timing;
+ char *expr;
+ char *iftrue;
+ char *iffalse;
+
+ data = ast_strip_quoted(data, "\"", "\"");
+ expr = strsep(&data, "?");
+ iftrue = strsep(&data, ":");
+ iffalse = data;
+
+ if (ast_strlen_zero(expr) || !(iftrue || iffalse)) {
+ ast_log(LOG_WARNING,
+ "Syntax IFTIME(<timespec>?[<true>][:<false>])\n");
+ return -1;
+ }
+
+ if (!ast_build_timing(&timing, expr)) {
+ ast_log(LOG_WARNING, "Invalid Time Spec.\n");
+ return -1;
+ }
+
+ if (iftrue)
+ iftrue = ast_strip_quoted(iftrue, "\"", "\"");
+ if (iffalse)
+ iffalse = ast_strip_quoted(iffalse, "\"", "\"");
+
+ ast_copy_string(buf, ast_check_timing(&timing) ? S_OR(iftrue, "") : S_OR(iffalse, ""), len);
+
+ return 0;
+}
+
+static int acf_if(struct ast_channel *chan, char *cmd, char *data, char *buf,
+ size_t len)
+{
+ AST_DECLARE_APP_ARGS(args1,
+ AST_APP_ARG(expr);
+ AST_APP_ARG(remainder);
+ );
+ AST_DECLARE_APP_ARGS(args2,
+ AST_APP_ARG(iftrue);
+ AST_APP_ARG(iffalse);
+ );
+ args2.iftrue = args2.iffalse = NULL; /* you have to set these, because if there is nothing after the '?',
+ then args1.remainder will be NULL, not a pointer to a null string, and
+ then any garbage in args2.iffalse will not be cleared, and you'll crash.
+ -- and if you mod the ast_app_separate_args func instead, you'll really
+ mess things up badly, because the rest of everything depends on null args
+ for non-specified stuff. */
+
+ AST_NONSTANDARD_APP_ARGS(args1, data, '?');
+ AST_NONSTANDARD_APP_ARGS(args2, args1.remainder, ':');
+
+ if (ast_strlen_zero(args1.expr) || !(args2.iftrue || args2.iffalse)) {
+ ast_log(LOG_WARNING, "Syntax IF(<expr>?[<true>][:<false>]) (expr must be non-null, and either <true> or <false> must be non-null)\n");
+ ast_log(LOG_WARNING, " In this case, <expr>='%s', <true>='%s', and <false>='%s'\n", args1.expr, args2.iftrue, args2.iffalse);
+ return -1;
+ }
+
+ args1.expr = ast_strip(args1.expr);
+ if (args2.iftrue)
+ args2.iftrue = ast_strip(args2.iftrue);
+ if (args2.iffalse)
+ args2.iffalse = ast_strip(args2.iffalse);
+
+ ast_copy_string(buf, pbx_checkcondition(args1.expr) ? (S_OR(args2.iftrue, "")) : (S_OR(args2.iffalse, "")), len);
+
+ return 0;
+}
+
+static int set(struct ast_channel *chan, char *cmd, char *data, char *buf,
+ size_t len)
+{
+ char *varname;
+ char *val;
+
+ varname = strsep(&data, "=");
+ val = data;
+
+ if (ast_strlen_zero(varname) || !val) {
+ ast_log(LOG_WARNING, "Syntax SET(<varname>=[<value>])\n");
+ return -1;
+ }
+
+ varname = ast_strip(varname);
+ val = ast_strip(val);
+ pbx_builtin_setvar_helper(chan, varname, val);
+ ast_copy_string(buf, val, len);
+
+ return 0;
+}
+
+static struct ast_custom_function isnull_function = {
+ .name = "ISNULL",
+ .synopsis = "NULL Test: Returns 1 if NULL or 0 otherwise",
+ .syntax = "ISNULL(<data>)",
+ .read = isnull,
+};
+
+static struct ast_custom_function set_function = {
+ .name = "SET",
+ .synopsis = "SET assigns a value to a channel variable",
+ .syntax = "SET(<varname>=[<value>])",
+ .read = set,
+};
+
+static struct ast_custom_function exists_function = {
+ .name = "EXISTS",
+ .synopsis = "Existence Test: Returns 1 if exists, 0 otherwise",
+ .syntax = "EXISTS(<data>)",
+ .read = exists,
+};
+
+static struct ast_custom_function if_function = {
+ .name = "IF",
+ .synopsis =
+ "Conditional: Returns the data following '?' if true else the data following ':'",
+ .syntax = "IF(<expr>?[<true>][:<false>])",
+ .read = acf_if,
+};
+
+static struct ast_custom_function if_time_function = {
+ .name = "IFTIME",
+ .synopsis =
+ "Temporal Conditional: Returns the data following '?' if true else the data following ':'",
+ .syntax = "IFTIME(<timespec>?[<true>][:<false>])",
+ .read = iftime,
+};
+
+static int unload_module(void)
+{
+ int res = 0;
+
+ res |= ast_custom_function_unregister(&isnull_function);
+ res |= ast_custom_function_unregister(&set_function);
+ res |= ast_custom_function_unregister(&exists_function);
+ res |= ast_custom_function_unregister(&if_function);
+ res |= ast_custom_function_unregister(&if_time_function);
+
+ return res;
+}
+
+static int load_module(void)
+{
+ int res = 0;
+
+ res |= ast_custom_function_register(&isnull_function);
+ res |= ast_custom_function_register(&set_function);
+ res |= ast_custom_function_register(&exists_function);
+ res |= ast_custom_function_register(&if_function);
+ res |= ast_custom_function_register(&if_time_function);
+
+ return res;
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Logical dialplan functions");