From f72f506f340b469ecfc9cf72a6890ec4d62f3d88 Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Fri, 24 Dec 2004 01:18:13 +0000
Subject: [PATCH] Merge anthm's while loop code (thanks tony!) (bug #2907)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4551 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
apps/Makefile | 2 +-
apps/app_while.c | 241 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 242 insertions(+), 1 deletion(-)
create mode 100755 apps/app_while.c
diff --git a/apps/Makefile b/apps/Makefile
index 17d2b44e12..b489f8fa96 100755
--- a/apps/Makefile
+++ b/apps/Makefile
@@ -30,7 +30,7 @@ APPS=app_dial.so app_playback.so app_voicemail.so app_directory.so app_mp3.so\
app_groupcount.so app_txtcidname.so app_controlplayback.so \
app_talkdetect.so app_alarmreceiver.so app_userevent.so app_verbose.so \
app_test.so app_forkcdr.so app_math.so app_realtime.so \
- app_dumpchan.so app_waitforsilence.so
+ app_dumpchan.so app_waitforsilence.so app_while.so
ifneq (${OSARCH},Darwin)
ifneq (${OSARCH},SunOS)
diff --git a/apps/app_while.c b/apps/app_while.c
new file mode 100755
index 0000000000..ab1d9d4729
--- /dev/null
+++ b/apps/app_while.c
@@ -0,0 +1,241 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * While Loop and ExecIf Implementations
+ *
+ * Copyright Anthony Minessale <anthmct@yahoo.com>
+ *
+ * Anthony Minessale <anthmct@yahoo.com>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/utils.h>
+#include <asterisk/config.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <asterisk/lock.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#define ALL_DONE(u,ret) {LOCAL_USER_REMOVE(u); return ret;}
+
+
+static char *exec_app = "ExecIf";
+static char *exec_desc = " ExecIF (<expr>|<app>|<data>)\n"
+"If <expr> is true, execute and return the result of <app>(<data>)\n\n";
+static char *exec_synopsis = "ExecIF (<expr>|<app>|<data>)";
+
+static char *start_app = "While";
+static char *start_desc = " While(<expr>)\n"
+"Start a While Loop. Execution will return to this point when\n"
+"EndWhile is called until expr is no longer true.\n";
+
+static char *start_synopsis = "Start A While Loop";
+
+
+static char *stop_app = "EndWhile";
+static char *stop_desc = " EndWhile()\n"
+"Return to the previous called While\n\n";
+
+static char *stop_synopsis = "End A While Loop";
+
+static char *tdesc = "";
+
+
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int execif_exec(struct ast_channel *chan, void *data) {
+ int res=0;
+ struct localuser *u;
+ LOCAL_USER_ADD(u);
+ char *myapp = NULL;
+ char *mydata = NULL;
+ char *expr = NULL;
+ struct ast_app *app = NULL;
+
+ expr = ast_strdupa((char *) data);
+ if ((myapp = strchr(expr,'|'))) {
+ *myapp = '\0';
+ myapp++;
+ if ((mydata = strchr(myapp,'|'))) {
+ *mydata = '\0';
+ mydata++;
+ } else
+ mydata = "";
+
+ if(ast_true(expr) && (app = pbx_findapp(myapp))) {
+ res = pbx_exec(chan, app, mydata, 1);
+ }
+ } else {
+ ast_log(LOG_ERROR,"Invalid Syntax.\n");
+ res = -1;
+ }
+
+ ALL_DONE(u,res);
+}
+
+#define VAR_SIZE 64
+
+
+static char *get_index(struct ast_channel *chan, const char *prefix, int index) {
+ char varname[VAR_SIZE];
+
+ snprintf(varname, VAR_SIZE, "%s_%d", prefix, index);
+ return pbx_builtin_getvar_helper(chan, varname);
+}
+
+
+static int _while_exec(struct ast_channel *chan, void *data, int end)
+{
+ int res=0;
+ struct localuser *u;
+ char *while_pri = NULL;
+ char *goto_str = NULL, *my_name = NULL;
+ char *condition = NULL, *label = NULL;
+ char varname[VAR_SIZE], end_varname[VAR_SIZE];
+ const char *prefix = "WHILE";
+ size_t size=0;
+ int used_index_i = -1, x=0;
+ char used_index[VAR_SIZE] = "0", new_index[VAR_SIZE] = "0";
+
+ if (!chan) {
+ /* huh ? */
+ return -1;
+ }
+
+ LOCAL_USER_ADD(u);
+
+ /* dont want run away loops if the chan isn't even up
+ this is up for debate since it slows things down a tad ......
+ */
+ if (ast_waitfordigit(chan,1) < 0)
+ ALL_DONE(u,-1);
+
+
+ for (x=0;;x++) {
+ if (get_index(chan, prefix, x)) {
+ used_index_i = x;
+ } else
+ break;
+ }
+
+ snprintf(used_index, VAR_SIZE, "%d", used_index_i);
+ snprintf(new_index, VAR_SIZE, "%d", used_index_i + 1);
+
+ if (!end) {
+ condition = ast_strdupa((char *) data);
+ }
+
+ size = strlen(chan->context) + strlen(chan->exten) + 32;
+ my_name = alloca(size);
+ memset(my_name, 0, size);
+ snprintf(my_name, size, "%s_%s_%d", chan->context, chan->exten, chan->priority);
+
+ if (!label || ast_strlen_zero(label)) {
+ if (end)
+ label = used_index;
+ else if (!(label = pbx_builtin_getvar_helper(chan, my_name))) {
+ label = new_index;
+ pbx_builtin_setvar_helper(chan, my_name, label);
+ }
+
+ }
+
+ snprintf(varname, VAR_SIZE, "%s_%s", prefix, label);
+ while_pri = pbx_builtin_getvar_helper(chan, varname);
+
+ if ((while_pri = pbx_builtin_getvar_helper(chan, varname)) && !end) {
+ snprintf(end_varname,VAR_SIZE,"END_%s",varname);
+ }
+
+
+ if (!end && !ast_true(condition)) {
+ /* Condition Met (clean up helper vars) */
+ pbx_builtin_setvar_helper(chan, varname, NULL);
+ pbx_builtin_setvar_helper(chan, my_name, NULL);
+ snprintf(end_varname,VAR_SIZE,"END_%s",varname);
+ if ((goto_str=pbx_builtin_getvar_helper(chan, end_varname))) {
+ pbx_builtin_setvar_helper(chan, end_varname, NULL);
+ ast_parseable_goto(chan, goto_str);
+ }
+ ALL_DONE(u,res);
+ }
+
+ if (!end && !while_pri) {
+ size = strlen(chan->context) + strlen(chan->exten) + 32;
+ goto_str = alloca(size);
+ memset(goto_str, 0, size);
+ snprintf(goto_str, size, "%s|%s|%d", chan->context, chan->exten, chan->priority);
+ pbx_builtin_setvar_helper(chan, varname, goto_str);
+ }
+
+ else if (end && while_pri) {
+ /* END of loop */
+ snprintf(end_varname, VAR_SIZE, "END_%s", varname);
+ if (! pbx_builtin_getvar_helper(chan, end_varname)) {
+ size = strlen(chan->context) + strlen(chan->exten) + 32;
+ goto_str = alloca(size);
+ memset(goto_str, 0, size);
+ snprintf(goto_str, size, "%s|%s|%d", chan->context, chan->exten, chan->priority+1);
+ pbx_builtin_setvar_helper(chan, end_varname, goto_str);
+ }
+ ast_parseable_goto(chan, while_pri);
+ }
+
+
+
+
+ ALL_DONE(u, res);
+}
+
+static int while_start_exec(struct ast_channel *chan, void *data) {
+ return _while_exec(chan, data, 0);
+}
+
+static int while_end_exec(struct ast_channel *chan, void *data) {
+ return _while_exec(chan, data, 1);
+}
+
+
+int unload_module(void)
+{
+ STANDARD_HANGUP_LOCALUSERS;
+ ast_unregister_application(start_app);
+ ast_unregister_application(exec_app);
+ return ast_unregister_application(stop_app);
+}
+
+int load_module(void)
+{
+ ast_register_application(start_app, while_start_exec, start_synopsis, start_desc);
+ ast_register_application(exec_app, execif_exec, exec_synopsis, exec_desc);
+ return ast_register_application(stop_app, while_end_exec, stop_synopsis, stop_desc);
+}
+
+char *description(void)
+{
+ return tdesc;
+}
+
+int usecount(void)
+{
+ int res;
+ STANDARD_USECOUNT(res);
+ return res;
+}
+
+char *key()
+{
+ return ASTERISK_GPL_KEY;
+}
+
--
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