![kpfleming](/assets/img/avatar_default.png)
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@5508 f38db490-d61c-443f-a65b-d21fe96a405b
252 lines
5.9 KiB
C
Executable file
252 lines
5.9 KiB
C
Executable file
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* While Loop and ExecIf Implementations
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*
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* Copyright 2004 - 2005, Anthony Minessale <anthmct@yahoo.com>
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*
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* Anthony Minessale <anthmct@yahoo.com>
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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
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*/
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/utils.h"
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#include "asterisk/config.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/lock.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#define ALL_DONE(u,ret) {LOCAL_USER_REMOVE(u); return ret;}
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static char *exec_app = "ExecIf";
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static char *exec_desc =
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"Usage: ExecIF (<expr>|<app>|<data>)\n"
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"If <expr> is true, execute and return the result of <app>(<data>).\n"
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"If <expr> is true, but <app> is not found, then the application\n"
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"will return a non-zero value.";
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static char *exec_synopsis = "Conditional exec";
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static char *start_app = "While";
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static char *start_desc =
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"Usage: While(<expr>)\n"
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"Start a While Loop. Execution will return to this point when\n"
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"EndWhile is called until expr is no longer true.\n";
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static char *start_synopsis = "Start A While Loop";
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static char *stop_app = "EndWhile";
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static char *stop_desc =
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"Usage: EndWhile()\n"
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"Return to the previous called While\n\n";
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static char *stop_synopsis = "End A While Loop";
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static char *tdesc = "While Loops and Conditional Execution";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static int execif_exec(struct ast_channel *chan, void *data) {
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int res=0;
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struct localuser *u;
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char *myapp = NULL;
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char *mydata = NULL;
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char *expr = NULL;
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struct ast_app *app = NULL;
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LOCAL_USER_ADD(u);
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expr = ast_strdupa((char *) data);
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if ((myapp = strchr(expr,'|'))) {
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*myapp = '\0';
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myapp++;
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if ((mydata = strchr(myapp,'|'))) {
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*mydata = '\0';
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mydata++;
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} else
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mydata = "";
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if (ast_true(expr)) {
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if ((app = pbx_findapp(myapp))) {
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res = pbx_exec(chan, app, mydata, 1);
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} else {
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ast_log(LOG_WARNING, "Count not find application! (%s)\n", myapp);
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res = -1;
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}
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}
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} else {
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ast_log(LOG_ERROR,"Invalid Syntax.\n");
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res = -1;
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}
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ALL_DONE(u,res);
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}
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#define VAR_SIZE 64
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static char *get_index(struct ast_channel *chan, const char *prefix, int index) {
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char varname[VAR_SIZE];
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snprintf(varname, VAR_SIZE, "%s_%d", prefix, index);
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return pbx_builtin_getvar_helper(chan, varname);
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}
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static int _while_exec(struct ast_channel *chan, void *data, int end)
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{
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int res=0;
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struct localuser *u;
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char *while_pri = NULL;
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char *goto_str = NULL, *my_name = NULL;
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char *condition = NULL, *label = NULL;
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char varname[VAR_SIZE], end_varname[VAR_SIZE];
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const char *prefix = "WHILE";
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size_t size=0;
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int used_index_i = -1, x=0;
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char used_index[VAR_SIZE] = "0", new_index[VAR_SIZE] = "0";
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if (!chan) {
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/* huh ? */
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return -1;
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}
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LOCAL_USER_ADD(u);
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/* dont want run away loops if the chan isn't even up
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this is up for debate since it slows things down a tad ......
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*/
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if (ast_waitfordigit(chan,1) < 0)
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ALL_DONE(u,-1);
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for (x=0;;x++) {
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if (get_index(chan, prefix, x)) {
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used_index_i = x;
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} else
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break;
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}
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snprintf(used_index, VAR_SIZE, "%d", used_index_i);
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snprintf(new_index, VAR_SIZE, "%d", used_index_i + 1);
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if (!end) {
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condition = ast_strdupa((char *) data);
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}
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size = strlen(chan->context) + strlen(chan->exten) + 32;
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my_name = alloca(size);
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memset(my_name, 0, size);
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snprintf(my_name, size, "%s_%s_%d", chan->context, chan->exten, chan->priority);
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if (!label || ast_strlen_zero(label)) {
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if (end)
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label = used_index;
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else if (!(label = pbx_builtin_getvar_helper(chan, my_name))) {
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label = new_index;
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pbx_builtin_setvar_helper(chan, my_name, label);
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}
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}
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snprintf(varname, VAR_SIZE, "%s_%s", prefix, label);
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while_pri = pbx_builtin_getvar_helper(chan, varname);
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if ((while_pri = pbx_builtin_getvar_helper(chan, varname)) && !end) {
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snprintf(end_varname,VAR_SIZE,"END_%s",varname);
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}
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if (!end && !ast_true(condition)) {
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/* Condition Met (clean up helper vars) */
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pbx_builtin_setvar_helper(chan, varname, NULL);
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pbx_builtin_setvar_helper(chan, my_name, NULL);
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snprintf(end_varname,VAR_SIZE,"END_%s",varname);
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if ((goto_str=pbx_builtin_getvar_helper(chan, end_varname))) {
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pbx_builtin_setvar_helper(chan, end_varname, NULL);
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ast_parseable_goto(chan, goto_str);
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}
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ALL_DONE(u,res);
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}
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if (!end && !while_pri) {
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size = strlen(chan->context) + strlen(chan->exten) + 32;
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goto_str = alloca(size);
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memset(goto_str, 0, size);
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snprintf(goto_str, size, "%s|%s|%d", chan->context, chan->exten, chan->priority);
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pbx_builtin_setvar_helper(chan, varname, goto_str);
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}
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else if (end && while_pri) {
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/* END of loop */
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snprintf(end_varname, VAR_SIZE, "END_%s", varname);
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if (! pbx_builtin_getvar_helper(chan, end_varname)) {
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size = strlen(chan->context) + strlen(chan->exten) + 32;
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goto_str = alloca(size);
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memset(goto_str, 0, size);
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snprintf(goto_str, size, "%s|%s|%d", chan->context, chan->exten, chan->priority+1);
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pbx_builtin_setvar_helper(chan, end_varname, goto_str);
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}
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ast_parseable_goto(chan, while_pri);
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}
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ALL_DONE(u, res);
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}
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static int while_start_exec(struct ast_channel *chan, void *data) {
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return _while_exec(chan, data, 0);
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}
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static int while_end_exec(struct ast_channel *chan, void *data) {
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return _while_exec(chan, data, 1);
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}
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int unload_module(void)
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{
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STANDARD_HANGUP_LOCALUSERS;
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ast_unregister_application(start_app);
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ast_unregister_application(exec_app);
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return ast_unregister_application(stop_app);
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}
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int load_module(void)
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{
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ast_register_application(start_app, while_start_exec, start_synopsis, start_desc);
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ast_register_application(exec_app, execif_exec, exec_synopsis, exec_desc);
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return ast_register_application(stop_app, while_end_exec, stop_synopsis, stop_desc);
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}
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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