Index: main/pbx.c
===================================================================
--- main/pbx.c	(revision 188028)
+++ main/pbx.c	(working copy)
@@ -237,6 +237,8 @@
 static int pbx_builtin_saycharacters(struct ast_channel *, void *);
 static int pbx_builtin_sayphonetic(struct ast_channel *, void *);
 int pbx_builtin_setvar(struct ast_channel *, void *);
+int pbx_builtin_incvar(struct ast_channel *, void *);
+int pbx_builtin_decvar(struct ast_channel *, void *);
 static int pbx_builtin_importvar(struct ast_channel *, void *);
 
 AST_MUTEX_DEFINE_STATIC(globalslock);
@@ -460,6 +462,24 @@
 	"function instead.\n"
 	},
 
+	{ "Inc", pbx_builtin_incvar,
+	"Increment channel variable by 1",
+	"  Inc(name)\n"
+	"This function can be used to increment the value of a channel variable.\n"
+	"Essentially, this function can be used instead of issuing the following:\n"
+	"  Set(Var=$[${Var} + 1])\n"
+	"\n\nThis function will accept a single variable only\n"
+	},
+
+	{ "Dec", pbx_builtin_decvar,
+	"Decrement channel variable by 1",
+	"  Dec(name)\n"
+	"This function can be used to decrement the value of a channel variable.\n"
+	"Essentially, this function can be used instead of issuing the following:\n"
+	"  Set(Var=$[${Var} - 1])\n"
+	"\n\nThis function will accept a single variable only\n"
+	},
+
 	{ "ImportVar", pbx_builtin_importvar,
 	"Import a variable from a channel into a new variable",
 	"  ImportVar(newvar=channelname|variable): This application imports a variable\n"
@@ -5948,6 +5968,85 @@
 	return(0);
 }
 
+/* This function will increment the value of a variable by 1 */
+int pbx_builtin_incvar(struct ast_channel *chan, void *data)
+{
+	char *mydata, *newvalue;
+	int argc;
+	char *argv[24];		/* This really isn't used here */
+	int global = 0;
+	int x;
+
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "Inc requires a variable name.\n");
+		return 0;
+	}
+
+	mydata = ast_strdupa(data);
+
+	ast_log(LOG_NOTICE, "mydata now contains: %s\n",mydata);
+
+	argc = ast_app_separate_args(mydata, '|', argv, sizeof(argv) / sizeof(argv[0]));
+
+	if (argc > 1) {
+		ast_log(LOG_WARNING, "The use of Inc accepts a single variable name\n");
+		return 0;
+	}
+
+	const char *value = pbx_builtin_getvar_helper(chan, mydata);
+
+	x = atoi(value);
+	x++;
+
+	sprintf(newvalue,"%d",x);
+
+	ast_log(LOG_NOTICE, "The value of %s is now: %s\n", mydata, newvalue);
+
+	pbx_builtin_setvar_helper((global) ? NULL : chan, mydata, newvalue);
+
+	return(0);
+}
+
+/* This function will decrement the value of a variable by 1 */
+int pbx_builtin_decvar(struct ast_channel *chan, void *data)
+{
+	char *mydata, *newvalue;
+	int argc;
+	char *argv[24];		/* This really isn't used here */
+	int global = 0;
+	int x;
+
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "Inc requires a variable name.\n");
+		return 0;
+	}
+
+	mydata = ast_strdupa(data);
+
+	ast_log(LOG_NOTICE, "mydata now contains: %s\n",mydata);
+
+	argc = ast_app_separate_args(mydata, '|', argv, sizeof(argv) / sizeof(argv[0]));
+
+	if (argc > 1) {
+		ast_log(LOG_WARNING, "The use of Inc accepts a single variable name\n");
+		return 0;
+	}
+
+	const char *value = pbx_builtin_getvar_helper(chan, mydata);
+
+	x = atoi(value);
+	x--;
+
+	sprintf(newvalue,"%d",x);
+
+	ast_log(LOG_NOTICE, "The value of %s is now: %s\n", mydata, newvalue);
+
+	pbx_builtin_setvar_helper((global) ? NULL : chan, mydata, newvalue);
+
+	return(0);
+}
+
+
 int pbx_builtin_importvar(struct ast_channel *chan, void *data)
 {
 	char *name;