Version 0.3.0 from FTP

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@606 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_substring.c

@@ -0,0 +1,131 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Skeleton application
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * 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/pbx.h>
+#include <asterisk/module.h>
+#include <asterisk/pbx.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <pthread.h>
+
+
+static char *tdesc = "Save substring digits in a given variable";
+
+extern void pbx_builtin_setvar_helper(struct ast_channel *chan, char *name, char *value);
+
+static char *descrip =
+"  StripLSD(variable=string_of_digits|count1|count2): Assigns the substring\n"
+"of string_of_digits to a given variable. Parameter count1 may be positive\n"
+"or negative. If it's positive then we skip the first count1 digits from the\n"
+"left. If it's negative, we move count1 digits counting from the end of\n"
+"the string to the left. Parameter count2 may be only positive and implies\n"
+"how many digits we're taking from the point that count1 placed us.\n"
+"For example:\n"
+"exten => _NXXXXXX,1,SubString,test=2564286161|0|3\n"
+"assigns the area code (3 first digits) to variable test.\n"
+"exten => _NXXXXXX,1,SubString,test=2564286161|-7|7\n"
+"assigns the last 7 digits to variable test.\n"
+"If there are no parameters it'll return with -1.\n"
+"If there wrong parameters it go on and return with 0\n";
+
+static char *app = "SubString";
+
+static char *synopsis = "Save substring digits in a given variable";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int substring_exec(struct ast_channel *chan, void *data)
+{
+  char newexten[AST_MAX_EXTENSION] = "";
+  char *count1, *count2;
+  char *first, *second, *stringp;
+  stringp=alloca(strlen(data)+1);
+  strncpy(stringp,data,strlen(data)+1);
+  if (strchr(stringp,'|')&&strchr(stringp,'=')) {
+    int icount1,icount2;
+    first=strsep(&stringp,"=");
+    second=strsep(&stringp,"|");
+    count1=strsep(&stringp,"|");
+    count2=strsep(&stringp,"\0");
+    if (!first || !second || !count1 || !count2) {
+      ast_log(LOG_DEBUG, "Ignoring, since there is no argument: variable or string or count1 or count2\n");
+      return 0;
+    }
+    icount1=atoi(count1);
+    icount2=atoi(count2);
+    if (icount2<=0) {
+      ast_log(LOG_DEBUG, "Exiting, wrong parameter count2\n");
+      return -1;
+    }
+    if (abs(icount1)>strlen(second)) {
+      ast_log(LOG_WARNING, "Limiting count1 parameter because it exceeds the length of the string\n");
+      if (icount1>=0)
+        icount1=strlen(second);
+      else
+        icount1=0;
+    }
+    if ((icount1<0 && icount2>-icount1) || (icount1>=0 && icount1+icount2>strlen(second))) {
+      ast_log(LOG_WARNING, "Limiting count2 parameter because it exceeds the length of the string\n");
+      if (icount1>=0)
+      	icount2=strlen(second)-icount1;
+      else
+      	icount2=strlen(second)+icount1;
+    }
+    if (first&&second) {
+      if (icount1>=0)
+        strncpy(newexten,second+icount1,icount2);
+      else
+        strncpy(newexten,second+strlen(second)+icount1,icount2);
+      pbx_builtin_setvar_helper(chan,first,newexten);
+    }
+  } else {
+    ast_log(LOG_DEBUG, "Ignoring, no parameters\n");
+  }
+  return 0;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(app);
+}
+
+int load_module(void)
+{
+	return ast_register_application(app, substring_exec, synopsis, descrip);
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}