https://origsvn.digium.com/svn/asterisk/branches/1.10 ................ r328247 | lmadsen | 2011-07-14 16:25:31 -0400 (Thu, 14 Jul 2011) | 14 lines Merged revisions 328209 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.8 ........ r328209 | lmadsen | 2011-07-14 16:13:06 -0400 (Thu, 14 Jul 2011) | 6 lines Introduce <support_level> tags in MODULEINFO. This change introduces MODULEINFO into many modules in Asterisk in order to show the community support level for those modules. This is used by changes committed to menuselect by Russell Bryant recently (r917 in menuselect). More information about the support level types and what they mean is available on the wiki at https://wiki.asterisk.org/wiki/display/AST/Asterisk+Module+Support+States ........ ................ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@328259 65c4cc65-6c06-0410-ace0-fbb531ad65f3
344 lines
8.9 KiB
C
344 lines
8.9 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006, Digium, Inc.
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* Portions Copyright (C) 2005, Anthony Minessale II
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Conditional logic dialplan functions
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*
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* \author Anthony Minessale II
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*
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* \ingroup functions
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/utils.h"
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#include "asterisk/app.h"
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/*** DOCUMENTATION
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<function name="ISNULL" language="en_US">
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<synopsis>
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Check if a value is NULL.
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</synopsis>
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<syntax>
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<parameter name="data" required="true" />
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</syntax>
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<description>
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<para>Returns <literal>1</literal> if NULL or <literal>0</literal> otherwise.</para>
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</description>
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</function>
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<function name="SET" language="en_US">
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<synopsis>
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SET assigns a value to a channel variable.
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</synopsis>
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<syntax argsep="=">
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<parameter name="varname" required="true" />
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<parameter name="value" />
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</syntax>
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<description>
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</description>
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</function>
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<function name="EXISTS" language="en_US">
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<synopsis>
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Test the existence of a value.
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</synopsis>
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<syntax>
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<parameter name="data" required="true" />
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</syntax>
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<description>
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<para>Returns <literal>1</literal> if exists, <literal>0</literal> otherwise.</para>
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</description>
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</function>
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<function name="IF" language="en_US">
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<synopsis>
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Check for an expresion.
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</synopsis>
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<syntax argsep="?">
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<parameter name="expresion" required="true" />
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<parameter name="retvalue" argsep=":" required="true">
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<argument name="true" />
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<argument name="false" />
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</parameter>
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</syntax>
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<description>
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<para>Returns the data following <literal>?</literal> if true, else the data following <literal>:</literal></para>
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</description>
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</function>
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<function name="IFTIME" language="en_US">
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<synopsis>
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Temporal Conditional.
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</synopsis>
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<syntax argsep="?">
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<parameter name="timespec" required="true" />
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<parameter name="retvalue" required="true" argsep=":">
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<argument name="true" />
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<argument name="false" />
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</parameter>
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</syntax>
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<description>
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<para>Returns the data following <literal>?</literal> if true, else the data following <literal>:</literal></para>
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</description>
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</function>
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<function name="IMPORT" language="en_US">
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<synopsis>
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Retrieve the value of a variable from another channel.
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</synopsis>
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<syntax>
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<parameter name="channel" required="true" />
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<parameter name="variable" required="true" />
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</syntax>
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<description>
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</description>
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</function>
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***/
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static int isnull(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, size_t len)
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{
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strcpy(buf, data && *data ? "0" : "1");
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return 0;
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}
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static int exists(struct ast_channel *chan, const char *cmd, char *data, char *buf,
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size_t len)
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{
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strcpy(buf, data && *data ? "1" : "0");
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return 0;
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}
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static int iftime(struct ast_channel *chan, const char *cmd, char *data, char *buf,
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size_t len)
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{
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struct ast_timing timing;
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char *expr;
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char *iftrue;
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char *iffalse;
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data = ast_strip_quoted(data, "\"", "\"");
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expr = strsep(&data, "?");
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iftrue = strsep(&data, ":");
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iffalse = data;
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if (ast_strlen_zero(expr) || !(iftrue || iffalse)) {
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ast_log(LOG_WARNING,
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"Syntax IFTIME(<timespec>?[<true>][:<false>])\n");
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return -1;
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}
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if (!ast_build_timing(&timing, expr)) {
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ast_log(LOG_WARNING, "Invalid Time Spec.\n");
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ast_destroy_timing(&timing);
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return -1;
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}
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if (iftrue)
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iftrue = ast_strip_quoted(iftrue, "\"", "\"");
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if (iffalse)
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iffalse = ast_strip_quoted(iffalse, "\"", "\"");
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ast_copy_string(buf, ast_check_timing(&timing) ? S_OR(iftrue, "") : S_OR(iffalse, ""), len);
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ast_destroy_timing(&timing);
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return 0;
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}
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static int acf_if(struct ast_channel *chan, const char *cmd, char *data, char *buf,
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size_t len)
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{
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AST_DECLARE_APP_ARGS(args1,
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AST_APP_ARG(expr);
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AST_APP_ARG(remainder);
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);
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AST_DECLARE_APP_ARGS(args2,
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AST_APP_ARG(iftrue);
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AST_APP_ARG(iffalse);
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);
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args2.iftrue = args2.iffalse = NULL; /* you have to set these, because if there is nothing after the '?',
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then args1.remainder will be NULL, not a pointer to a null string, and
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then any garbage in args2.iffalse will not be cleared, and you'll crash.
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-- and if you mod the ast_app_separate_args func instead, you'll really
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mess things up badly, because the rest of everything depends on null args
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for non-specified stuff. */
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AST_NONSTANDARD_APP_ARGS(args1, data, '?');
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AST_NONSTANDARD_APP_ARGS(args2, args1.remainder, ':');
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if (ast_strlen_zero(args1.expr) || !(args2.iftrue || args2.iffalse)) {
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ast_log(LOG_WARNING, "Syntax IF(<expr>?[<true>][:<false>]) (expr must be non-null, and either <true> or <false> must be non-null)\n");
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ast_log(LOG_WARNING, " In this case, <expr>='%s', <true>='%s', and <false>='%s'\n", args1.expr, args2.iftrue, args2.iffalse);
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return -1;
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}
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args1.expr = ast_strip(args1.expr);
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if (args2.iftrue)
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args2.iftrue = ast_strip(args2.iftrue);
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if (args2.iffalse)
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args2.iffalse = ast_strip(args2.iffalse);
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ast_copy_string(buf, pbx_checkcondition(args1.expr) ? (S_OR(args2.iftrue, "")) : (S_OR(args2.iffalse, "")), len);
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return 0;
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}
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static int set(struct ast_channel *chan, const char *cmd, char *data, char *buf,
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size_t len)
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{
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char *varname;
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char *val;
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varname = strsep(&data, "=");
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val = data;
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if (ast_strlen_zero(varname) || !val) {
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ast_log(LOG_WARNING, "Syntax SET(<varname>=[<value>])\n");
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return -1;
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}
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varname = ast_strip(varname);
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val = ast_strip(val);
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pbx_builtin_setvar_helper(chan, varname, val);
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ast_copy_string(buf, val, len);
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return 0;
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}
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static int set2(struct ast_channel *chan, const char *cmd, char *data, struct ast_str **str, ssize_t len)
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{
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if (len > -1) {
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ast_str_make_space(str, len == 0 ? strlen(data) : len);
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}
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return set(chan, cmd, data, ast_str_buffer(*str), ast_str_size(*str));
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}
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static int import_helper(struct ast_channel *chan, const char *cmd, char *data, char *buf, struct ast_str **str, ssize_t len)
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{
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(channel);
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AST_APP_ARG(varname);
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);
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AST_STANDARD_APP_ARGS(args, data);
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if (buf) {
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*buf = '\0';
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}
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if (!ast_strlen_zero(args.varname)) {
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struct ast_channel *chan2;
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if ((chan2 = ast_channel_get_by_name(args.channel))) {
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char *s = alloca(strlen(args.varname) + 4);
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if (s) {
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sprintf(s, "${%s}", args.varname);
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ast_channel_lock(chan2);
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if (buf) {
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pbx_substitute_variables_helper(chan2, s, buf, len);
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} else {
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ast_str_substitute_variables(str, len, chan2, s);
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}
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ast_channel_unlock(chan2);
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}
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chan2 = ast_channel_unref(chan2);
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}
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}
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return 0;
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}
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static int import_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
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{
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return import_helper(chan, cmd, data, buf, NULL, len);
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}
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static int import_read2(struct ast_channel *chan, const char *cmd, char *data, struct ast_str **str, ssize_t len)
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{
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return import_helper(chan, cmd, data, NULL, str, len);
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}
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static struct ast_custom_function isnull_function = {
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.name = "ISNULL",
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.read = isnull,
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.read_max = 2,
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};
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static struct ast_custom_function set_function = {
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.name = "SET",
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.read = set,
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.read2 = set2,
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};
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static struct ast_custom_function exists_function = {
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.name = "EXISTS",
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.read = exists,
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.read_max = 2,
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};
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static struct ast_custom_function if_function = {
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.name = "IF",
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.read = acf_if,
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};
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static struct ast_custom_function if_time_function = {
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.name = "IFTIME",
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.read = iftime,
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};
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static struct ast_custom_function import_function = {
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.name = "IMPORT",
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.read = import_read,
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.read2 = import_read2,
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};
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static int unload_module(void)
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{
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int res = 0;
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res |= ast_custom_function_unregister(&isnull_function);
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res |= ast_custom_function_unregister(&set_function);
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res |= ast_custom_function_unregister(&exists_function);
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res |= ast_custom_function_unregister(&if_function);
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res |= ast_custom_function_unregister(&if_time_function);
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res |= ast_custom_function_unregister(&import_function);
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return res;
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}
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static int load_module(void)
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{
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int res = 0;
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res |= ast_custom_function_register(&isnull_function);
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res |= ast_custom_function_register(&set_function);
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res |= ast_custom_function_register(&exists_function);
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res |= ast_custom_function_register(&if_function);
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res |= ast_custom_function_register(&if_time_function);
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res |= ast_custom_function_register(&import_function);
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return res;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Logical dialplan functions");
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