pval.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2006, Digium, Inc.
 *
 * Steve Murphy <[email protected]>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Compile symbolic Asterisk Extension Logic into Asterisk extensions, version 2.
 *
 */

/*** MODULEINFO
 <support_level>extended</support_level>
 ***/

#define ASTMM_LIBC ASTMM_REDIRECT
#include "asterisk.h"

#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <regex.h>
#include <sys/stat.h>

#include "asterisk/pbx.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/logger.h"
#include "asterisk/cli.h"
#include "asterisk/app.h"
#include "asterisk/channel.h"
#include "asterisk/callerid.h"
#include "asterisk/pval.h"
#include "asterisk/ael_structs.h"
#ifdef AAL_ARGCHECK
#include "asterisk/argdesc.h"
#endif
#include "asterisk/utils.h"

extern int localized_pbx_load_module(void);

static char expr_output[2096];
#define BUF_SIZE 2000

/* these functions are in ../ast_expr2.fl */

static int errs, warns;
static int notes;
#ifdef STANDALONE
static int extensions_dot_conf_loaded = 0;
#endif
static char *registrar = "pbx_ael";

static pval *current_db;
static pval *current_context;
static pval *current_extension;

static const char *match_context;
static const char *match_exten;
static const char *match_label;
static int in_abstract_context;
static int count_labels; /* true, put matcher in label counting mode */
static int label_count; /* labels are only meant to be counted in a context or exten */
static int return_on_context_match;
static pval *last_matched_label;
struct pval *match_pval(pval *item);
static void check_timerange(pval *p);
static void check_dow(pval *DOW);
static void check_day(pval *DAY);
static void check_month(pval *MON);
static void check_expr2_input(pval *expr, char *str);
static int extension_matches(pval *here, const char *exten, const char *pattern);
static void check_goto(pval *item);
static void find_pval_goto_item(pval *item, int lev);
static void find_pval_gotos(pval *item, int lev);
static int check_break(pval *item);
static int check_continue(pval *item);
static void check_label(pval *item);
static void check_macro_returns(pval *macro);

static struct pval *find_label_in_current_context(char *exten, char *label, pval *curr_cont);
static struct pval *find_first_label_in_current_context(char *label, pval *curr_cont);
static void print_pval_list(FILE *fin, pval *item, int depth);

static struct pval *find_label_in_current_extension(const char *label, pval *curr_ext);
static struct pval *find_label_in_current_db(const char *context, const char *exten, const char *label);
static pval *get_goto_target(pval *item);
static int label_inside_case(pval *label);
static void attach_exten(struct ael_extension **list, struct ael_extension *newmem);
static void fix_gotos_in_extensions(struct ael_extension *exten);
static pval *get_extension_or_contxt(pval *p);
static pval *get_contxt(pval *p);
static void remove_spaces_before_equals(char *str);

/* PRETTY PRINTER FOR AEL: ============================================================================= */

static void print_pval(FILE *fin, pval *item, int depth)
{
 int i;
 pval *lp;

 for (i=0; i<depth; i++) {
 fprintf(fin, "\t"); /* depth == indentation */
 }

 switch ( item->type ) {
 case PV_WORD:
 fprintf(fin,"%s;\n", item->u1.str); /* usually, words are encapsulated in something else */
 break;

 case PV_MACRO:
 fprintf(fin,"macro %s(", item->u1.str);
 for (lp=item->u2.arglist; lp; lp=lp->next) {
 if (lp != item->u2.arglist )
 fprintf(fin,", ");
 fprintf(fin,"%s", lp->u1.str);
 }
 fprintf(fin,") {\n");
 print_pval_list(fin,item->u3.macro_statements,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"};\n\n");
 break;

 case PV_CONTEXT:
 if ( item->u3.abstract )
 fprintf(fin,"abstract context %s {\n", item->u1.str);
 else
 fprintf(fin,"context %s {\n", item->u1.str);
 print_pval_list(fin,item->u2.statements,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"};\n\n");
 break;

 case PV_MACRO_CALL:
 fprintf(fin,"&%s(", item->u1.str);
 for (lp=item->u2.arglist; lp; lp=lp->next) {
 if ( lp != item->u2.arglist )
 fprintf(fin,", ");
 fprintf(fin,"%s", lp->u1.str);
 }
 fprintf(fin,");\n");
 break;

 case PV_APPLICATION_CALL:
 fprintf(fin,"%s(", item->u1.str);
 for (lp=item->u2.arglist; lp; lp=lp->next) {
 if ( lp != item->u2.arglist )
 fprintf(fin,",");
 fprintf(fin,"%s", lp->u1.str);
 }
 fprintf(fin,");\n");
 break;

 case PV_CASE:
 fprintf(fin,"case %s:\n", item->u1.str);
 print_pval_list(fin,item->u2.statements, depth+1);
 break;

 case PV_PATTERN:
 fprintf(fin,"pattern %s:\n", item->u1.str);
 print_pval_list(fin,item->u2.statements, depth+1);
 break;

 case PV_DEFAULT:
 fprintf(fin,"default:\n");
 print_pval_list(fin,item->u2.statements, depth+1);
 break;

 case PV_CATCH:
 fprintf(fin,"catch %s {\n", item->u1.str);
 print_pval_list(fin,item->u2.statements, depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"};\n");
 break;

 case PV_SWITCHES:
 fprintf(fin,"switches {\n");
 print_pval_list(fin,item->u1.list,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"};\n");
 break;

 case PV_ESWITCHES:
 fprintf(fin,"eswitches {\n");
 print_pval_list(fin,item->u1.list,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"};\n");
 break;

 case PV_INCLUDES:
 fprintf(fin,"includes {\n");
 for (lp=item->u1.list; lp; lp=lp->next) {
 for (i=0; i<depth+1; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"%s", lp->u1.str); /* usually, words are encapsulated in something else */
 if (lp->u2.arglist)
 fprintf(fin,"|%s|%s|%s|%s",
 lp->u2.arglist->u1.str,
 lp->u2.arglist->next->u1.str,
 lp->u2.arglist->next->next->u1.str,
 lp->u2.arglist->next->next->next->u1.str
 );
 fprintf(fin,";\n"); /* usually, words are encapsulated in something else */
 }

 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"};\n");
 break;

 case PV_STATEMENTBLOCK:
 fprintf(fin,"{\n");
 print_pval_list(fin,item->u1.list, depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"}\n");
 break;

 case PV_VARDEC:
 fprintf(fin,"%s=%s;\n", item->u1.str, item->u2.val);
 break;

 case PV_LOCALVARDEC:
 fprintf(fin,"local %s=%s;\n", item->u1.str, item->u2.val);
 break;

 case PV_GOTO:
 fprintf(fin,"goto %s", item->u1.list->u1.str);
 if ( item->u1.list->next )
 fprintf(fin,",%s", item->u1.list->next->u1.str);
 if ( item->u1.list->next && item->u1.list->next->next )
 fprintf(fin,",%s", item->u1.list->next->next->u1.str);
 fprintf(fin,"\n");
 break;

 case PV_LABEL:
 fprintf(fin,"%s:\n", item->u1.str);
 break;

 case PV_FOR:
 fprintf(fin,"for (%s; %s; %s)\n", item->u1.for_init, item->u2.for_test, item->u3.for_inc);
 print_pval_list(fin,item->u4.for_statements,depth+1);
 break;

 case PV_WHILE:
 fprintf(fin,"while (%s)\n", item->u1.str);
 print_pval_list(fin,item->u2.statements,depth+1);
 break;

 case PV_BREAK:
 fprintf(fin,"break;\n");
 break;

 case PV_RETURN:
 fprintf(fin,"return;\n");
 break;

 case PV_CONTINUE:
 fprintf(fin,"continue;\n");
 break;

 case PV_RANDOM:
 case PV_IFTIME:
 case PV_IF:
 if ( item->type == PV_IFTIME ) {

 fprintf(fin,"ifTime ( %s|%s|%s|%s )\n",
 item->u1.list->u1.str,
 item->u1.list->next->u1.str,
 item->u1.list->next->next->u1.str,
 item->u1.list->next->next->next->u1.str
 );
 } else if ( item->type == PV_RANDOM ) {
 fprintf(fin,"random ( %s )\n", item->u1.str );
 } else
 fprintf(fin,"if ( %s )\n", item->u1.str);
 if ( item->u2.statements && item->u2.statements->next ) {
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"{\n");
 print_pval_list(fin,item->u2.statements,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 if ( item->u3.else_statements )
 fprintf(fin,"}\n");
 else
 fprintf(fin,"};\n");
 } else if (item->u2.statements ) {
 print_pval_list(fin,item->u2.statements,depth+1);
 } else {
 if (item->u3.else_statements )
 fprintf(fin, " {} ");
 else
 fprintf(fin, " {}; ");
 }
 if ( item->u3.else_statements ) {
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"else\n");
 print_pval_list(fin,item->u3.else_statements, depth);
 }
 break;

 case PV_SWITCH:
 fprintf(fin,"switch( %s ) {\n", item->u1.str);
 print_pval_list(fin,item->u2.statements,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"}\n");
 break;

 case PV_EXTENSION:
 if ( item->u4.regexten )
 fprintf(fin, "regexten ");
 if ( item->u3.hints )
 fprintf(fin,"hints(%s) ", item->u3.hints);

 fprintf(fin,"%s => ", item->u1.str);
 print_pval_list(fin,item->u2.statements,depth+1);
 fprintf(fin,"\n");
 break;

 case PV_IGNOREPAT:
 fprintf(fin,"ignorepat => %s;\n", item->u1.str);
 break;

 case PV_GLOBALS:
 fprintf(fin,"globals {\n");
 print_pval_list(fin,item->u1.statements,depth+1);
 for (i=0; i<depth; i++) {
 fprintf(fin,"\t"); /* depth == indentation */
 }
 fprintf(fin,"}\n");
 break;
 }
}

static void print_pval_list(FILE *fin, pval *item, int depth)
{
 pval *i;

 for (i=item; i; i=i->next) {
 print_pval(fin, i, depth);
 }
}

void ael2_print(char *fname, pval *tree)
{
 FILE *fin = fopen(fname,"w");
 if ( !fin ) {
 ast_log(LOG_ERROR, "Couldn't open %s for writing.\n", fname);
 return;
 }
 print_pval_list(fin, tree, 0);
 fclose(fin);
}


/* EMPTY TEMPLATE FUNCS FOR AEL TRAVERSAL: ============================================================================= */

void traverse_pval_template(pval *item, int depth);
void traverse_pval_item_template(pval *item, int depth);


void traverse_pval_item_template(pval *item, int depth)/* depth comes in handy for a pretty print (indentation),
 but you may not need it */
{
 pval *lp;

 switch ( item->type ) {
 case PV_WORD:
 /* fields: item->u1.str == string associated with this (word). */
 break;

 case PV_MACRO:
 /* fields: item->u1.str == name of macro
 item->u2.arglist == pval list of PV_WORD arguments of macro, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg

 item->u3.macro_statements == pval list of statements in macro body.
 */
 for (lp=item->u2.arglist; lp; lp=lp->next) {

 }
 traverse_pval_item_template(item->u3.macro_statements,depth+1);
 break;

 case PV_CONTEXT:
 /* fields: item->u1.str == name of context
 item->u2.statements == pval list of statements in context body
 item->u3.abstract == int 1 if an abstract keyword were present
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_MACRO_CALL:
 /* fields: item->u1.str == name of macro to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 for (lp=item->u2.arglist; lp; lp=lp->next) {
 }
 break;

 case PV_APPLICATION_CALL:
 /* fields: item->u1.str == name of application to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 for (lp=item->u2.arglist; lp; lp=lp->next) {
 }
 break;

 case PV_CASE:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_PATTERN:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_DEFAULT:
 /* fields:
 item->u2.statements == pval list of statements under the case
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_CATCH:
 /* fields: item->u1.str == name of extension to catch
 item->u2.statements == pval list of statements in context body
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_SWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 traverse_pval_item_template(item->u1.list,depth+1);
 break;

 case PV_ESWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 traverse_pval_item_template(item->u1.list,depth+1);
 break;

 case PV_INCLUDES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 item->u2.arglist == pval list of 4 PV_WORD elements for time values
 */
 traverse_pval_item_template(item->u1.list,depth+1);
 traverse_pval_item_template(item->u2.arglist,depth+1);
 break;

 case PV_STATEMENTBLOCK:
 /* fields: item->u1.list == pval list of statements in block, one per entry in the list
 */
 traverse_pval_item_template(item->u1.list,depth+1);
 break;

 case PV_LOCALVARDEC:
 case PV_VARDEC:
 /* fields: item->u1.str == variable name
 item->u2.val == variable value to assign
 */
 break;

 case PV_GOTO:
 /* fields: item->u1.list == pval list of PV_WORD target names, up to 3, in order as given by user.
 item->u1.list->u1.str == where the data on a PV_WORD will always be.
 */

 if ( item->u1.list->next )
 ;
 if ( item->u1.list->next && item->u1.list->next->next )
 ;

 break;

 case PV_LABEL:
 /* fields: item->u1.str == label name
 */
 break;

 case PV_FOR:
 /* fields: item->u1.for_init == a string containing the initalizer
 item->u2.for_test == a string containing the loop test
 item->u3.for_inc == a string containing the loop increment

 item->u4.for_statements == a pval list of statements in the for ()
 */
 traverse_pval_item_template(item->u4.for_statements,depth+1);
 break;

 case PV_WHILE:
 /* fields: item->u1.str == the while conditional, as supplied by user

 item->u2.statements == a pval list of statements in the while ()
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_BREAK:
 /* fields: none
 */
 break;

 case PV_RETURN:
 /* fields: none
 */
 break;

 case PV_CONTINUE:
 /* fields: none
 */
 break;

 case PV_IFTIME:
 /* fields: item->u1.list == there are 4 linked PV_WORDs here.

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 if ( item->u3.else_statements ) {
 traverse_pval_item_template(item->u3.else_statements,depth+1);
 }
 break;

 case PV_RANDOM:
 /* fields: item->u1.str == the random number expression, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 if ( item->u3.else_statements ) {
 traverse_pval_item_template(item->u3.else_statements,depth+1);
 }
 break;

 case PV_IF:
 /* fields: item->u1.str == the if conditional, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 if ( item->u3.else_statements ) {
 traverse_pval_item_template(item->u3.else_statements,depth+1);
 }
 break;

 case PV_SWITCH:
 /* fields: item->u1.str == the switch expression

 item->u2.statements == a pval list of statements in the switch,
 (will be case statements, most likely!)
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_EXTENSION:
 /* fields: item->u1.str == the extension name, label, whatever it's called

 item->u2.statements == a pval list of statements in the extension
 item->u3.hints == a char * hint argument
 item->u4.regexten == an int boolean. non-zero says that regexten was specified
 */
 traverse_pval_item_template(item->u2.statements,depth+1);
 break;

 case PV_IGNOREPAT:
 /* fields: item->u1.str == the ignorepat data
 */
 break;

 case PV_GLOBALS:
 /* fields: item->u1.statements == pval list of statements, usually vardecs
 */
 traverse_pval_item_template(item->u1.statements,depth+1);
 break;
 }
}

void traverse_pval_template(pval *item, int depth) /* depth comes in handy for a pretty print (indentation),
 but you may not need it */
{
 pval *i;

 for (i=item; i; i=i->next) {
 traverse_pval_item_template(i, depth);
 }
}


/* SEMANTIC CHECKING FOR AEL: ============================================================================= */

/* (not all that is syntactically legal is good! */


static void check_macro_returns(pval *macro)
{
 pval *i;
 if (!macro->u3.macro_statements)
 {
 pval *z = calloc(1, sizeof(struct pval));
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The macro %s is empty! I will insert a return.\n",
 macro->filename, macro->startline, macro->endline, macro->u1.str);

 z->type = PV_RETURN;
 z->startline = macro->startline;
 z->endline = macro->endline;
 z->startcol = macro->startcol;
 z->endcol = macro->endcol;
 z->filename = strdup(macro->filename);

 macro->u3.macro_statements = z;
 return;
 }
 for (i=macro->u3.macro_statements; i; i=i->next) {
 /* if the last statement in the list is not return, then insert a return there */
 if (i->next == NULL) {
 if (i->type != PV_RETURN) {
 pval *z = calloc(1, sizeof(struct pval));
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The macro %s does not end with a return; I will insert one.\n",
 macro->filename, macro->startline, macro->endline, macro->u1.str);

 z->type = PV_RETURN;
 z->startline = macro->startline;
 z->endline = macro->endline;
 z->startcol = macro->startcol;
 z->endcol = macro->endcol;
 z->filename = strdup(macro->filename);

 i->next = z;
 return;
 }
 }
 }
 return;
}



static int extension_matches(pval *here, const char *exten, const char *pattern)
{
 int err1;
 regex_t preg;

 /* simple case, they match exactly, the pattern and exten name */
 if (strcmp(pattern,exten) == 0)
 return 1;

 if (pattern[0] == '_') {
 char reg1[2000];
 const char *p;
 char *r = reg1;

 if ( strlen(pattern)*5 >= 2000 ) /* safety valve */ {
 ast_log(LOG_ERROR,"Error: The pattern %s is way too big. Pattern matching cancelled.\n",
 pattern);
 return 0;
 }
 /* form a regular expression from the pattern, and then match it against exten */
 *r++ = '^'; /* what if the extension is a pattern ?? */
 *r++ = '_'; /* what if the extension is a pattern ?? */
 *r++ = '?';
 for (p=pattern+1; *p; p++) {
 switch ( *p ) {
 case 'X':
 *r++ = '[';
 *r++ = '0';
 *r++ = '-';
 *r++ = '9';
 *r++ = 'X';
 *r++ = ']';
 break;

 case 'Z':
 *r++ = '[';
 *r++ = '1';
 *r++ = '-';
 *r++ = '9';
 *r++ = 'Z';
 *r++ = ']';
 break;

 case 'N':
 *r++ = '[';
 *r++ = '2';
 *r++ = '-';
 *r++ = '9';
 *r++ = 'N';
 *r++ = ']';
 break;

 case '[':
 while ( *p && *p != ']' ) {
 *r++ = *p++;
 }
 *r++ = ']';
 if ( *p != ']') {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The extension pattern '%s' is missing a closing bracket \n",
 here->filename, here->startline, here->endline, pattern);
 }
 break;

 case '.':
 case '!':
 *r++ = '.';
 *r++ = '*';
 break;
 case '*': /* regex metacharacter */
 case '+': /* regex metacharacter */
 *r++ = '\\';
 /* fall through */
 default:
 *r++ = *p;
 break;

 }
 }
 *r++ = '$'; /* what if the extension is a pattern ?? */
 *r++ = *p++; /* put in the closing null */
 err1 = regcomp(&preg, reg1, REG_NOSUB|REG_EXTENDED);
 if ( err1 ) {
 char errmess[500];
 regerror(err1,&preg,errmess,sizeof(errmess));
 regfree(&preg);
 ast_log(LOG_WARNING, "Regcomp of %s failed, error code %d\n",
 reg1, err1);
 return 0;
 }
 err1 = regexec(&preg, exten, 0, 0, 0);
 regfree(&preg);

 if ( err1 ) {
 /* ast_log(LOG_NOTICE,"*****************************[%d]Extension %s did not match %s(%s)\n",
 err1,exten, pattern, reg1); */
 return 0; /* no match */
 } else {
 /* ast_log(LOG_NOTICE,"*****************************Extension %s matched %s\n",
 exten, pattern); */
 return 1;
 }
 }

 return 0;
}


static void check_expr2_input(pval *expr, char *str)
{
 int spaces = strspn(str,"\t \n");
 if ( !strncmp(str+spaces,"$[",2) ) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The expression '%s' is redundantly wrapped in '$[ ]'. \n",
 expr->filename, expr->startline, expr->endline, str);
 warns++;
 }
}

static void check_includes(pval *includes)
{
 struct pval *p4;
 for (p4=includes->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 char *incl_context = p4->u1.str;
 /* find a matching context name */
 struct pval *that_other_context = find_context(incl_context);
 if (!that_other_context && strcmp(incl_context, "parkedcalls") != 0) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The included context '%s' cannot be found.\n\
 (You may ignore this warning if '%s' exists in extensions.conf, or is created by another module. I cannot check for those.)\n",
 includes->filename, includes->startline, includes->endline, incl_context, incl_context);
 warns++;
 }
 }
}


static void check_timerange(pval *p)
{
 char *times;
 char *e;
 int s1, s2;
 int e1, e2;

 times = ast_strdupa(p->u1.str);

 /* Star is all times */
 if (ast_strlen_zero(times) || !strcmp(times, "*")) {
 return;
 }
 /* Otherwise expect a range */
 e = strchr(times, '-');
 if (!e) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The time range format (%s) requires a '-' surrounded by two 24-hour times of day!\n",
 p->filename, p->startline, p->endline, times);
 warns++;
 return;
 }
 *e = '\0';
 e++;
 while (*e && !isdigit(*e))
 e++;
 if (!*e) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The time range format (%s) is missing the end time!\n",
 p->filename, p->startline, p->endline, p->u1.str);
 warns++;
 }
 if (sscanf(times, "%2d:%2d", &s1, &s2) != 2) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The start time (%s) isn't quite right!\n",
 p->filename, p->startline, p->endline, times);
 warns++;
 }
 if (sscanf(e, "%2d:%2d", &e1, &e2) != 2) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The end time (%s) isn't quite right!\n",
 p->filename, p->startline, p->endline, times);
 warns++;
 }

 s1 = s1 * 30 + s2/2;
 if ((s1 < 0) || (s1 >= 24*30)) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The start time (%s) is out of range!\n",
 p->filename, p->startline, p->endline, times);
 warns++;
 }
 e1 = e1 * 30 + e2/2;
 if ((e1 < 0) || (e1 >= 24*30)) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The end time (%s) is out of range!\n",
 p->filename, p->startline, p->endline, e);
 warns++;
 }
 return;
}

static char *days[] =
{
 "sun",
 "mon",
 "tue",
 "wed",
 "thu",
 "fri",
 "sat",
};

/*! \brief get_dow: Get day of week */
static void check_dow(pval *DOW)
{
 char *dow;
 char *c;
 /* The following line is coincidence, really! */
 int s, e;

 dow = ast_strdupa(DOW->u1.str);

 /* Check for all days */
 if (ast_strlen_zero(dow) || !strcmp(dow, "*"))
 return;
 /* Get start and ending days */
 c = strchr(dow, '-');
 if (c) {
 *c = '\0';
 c++;
 } else
 c = NULL;
 /* Find the start */
 s = 0;
 while ((s < 7) && strcasecmp(dow, days[s])) s++;
 if (s >= 7) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The day (%s) must be one of 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', or 'sat'!\n",
 DOW->filename, DOW->startline, DOW->endline, dow);
 warns++;
 }
 if (c) {
 e = 0;
 while ((e < 7) && strcasecmp(c, days[e])) e++;
 if (e >= 7) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The end day (%s) must be one of 'sun', 'mon', 'tue', 'wed', 'thu', 'fri', or 'sat'!\n",
 DOW->filename, DOW->startline, DOW->endline, c);
 warns++;
 }
 } else
 e = s;
}

static void check_day(pval *DAY)
{
 char *day;
 char *c;
 /* The following line is coincidence, really! */
 int s, e;

 day = ast_strdupa(DAY->u1.str);

 /* Check for all days */
 if (ast_strlen_zero(day) || !strcmp(day, "*")) {
 return;
 }
 /* Get start and ending days */
 c = strchr(day, '-');
 if (c) {
 *c = '\0';
 c++;
 }
 /* Find the start */
 if (sscanf(day, "%2d", &s) != 1) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The start day of month (%s) must be a number!\n",
 DAY->filename, DAY->startline, DAY->endline, day);
 warns++;
 }
 else if ((s < 1) || (s > 31)) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The start day of month (%s) must be a number in the range [1-31]!\n",
 DAY->filename, DAY->startline, DAY->endline, day);
 warns++;
 }
 s--;
 if (c) {
 if (sscanf(c, "%2d", &e) != 1) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The end day of month (%s) must be a number!\n",
 DAY->filename, DAY->startline, DAY->endline, c);
 warns++;
 }
 else if ((e < 1) || (e > 31)) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The end day of month (%s) must be a number in the range [1-31]!\n",
 DAY->filename, DAY->startline, DAY->endline, day);
 warns++;
 }
 e--;
 } else
 e = s;
}

static char *months[] =
{
 "jan",
 "feb",
 "mar",
 "apr",
 "may",
 "jun",
 "jul",
 "aug",
 "sep",
 "oct",
 "nov",
 "dec",
};

static void check_month(pval *MON)
{
 char *mon;
 char *c;
 /* The following line is coincidence, really! */
 int s, e;

 mon = ast_strdupa(MON->u1.str);

 /* Check for all days */
 if (ast_strlen_zero(mon) || !strcmp(mon, "*"))
 return ;
 /* Get start and ending days */
 c = strchr(mon, '-');
 if (c) {
 *c = '\0';
 c++;
 }
 /* Find the start */
 s = 0;
 while ((s < 12) && strcasecmp(mon, months[s])) s++;
 if (s >= 12) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The start month (%s) must be a one of: 'jan', 'feb', ..., 'dec'!\n",
 MON->filename, MON->startline, MON->endline, mon);
 warns++;
 }
 if (c) {
 e = 0;
 while ((e < 12) && strcasecmp(mon, months[e])) e++;
 if (e >= 12) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The end month (%s) must be a one of: 'jan', 'feb', ..., 'dec'!\n",
 MON->filename, MON->startline, MON->endline, c);
 warns++;
 }
 } else
 e = s;
}

static int check_break(pval *item)
{
 pval *p = item;

 while( p && p->type != PV_MACRO && p->type != PV_CONTEXT ) /* early cutout, sort of */ {
 /* a break is allowed in WHILE, FOR, CASE, DEFAULT, PATTERN; otherwise, it don't make
 no sense */
 if( p->type == PV_CASE || p->type == PV_DEFAULT || p->type == PV_PATTERN
 || p->type == PV_WHILE || p->type == PV_FOR ) {
 return 1;
 }
 p = p->dad;
 }
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: 'break' not in switch, for, or while statement!\n",
 item->filename, item->startline, item->endline);
 errs++;

 return 0;
}

static int check_continue(pval *item)
{
 pval *p = item;

 while( p && p->type != PV_MACRO && p->type != PV_CONTEXT ) /* early cutout, sort of */ {
 /* a break is allowed in WHILE, FOR, CASE, DEFAULT, PATTERN; otherwise, it don't make
 no sense */
 if( p->type == PV_WHILE || p->type == PV_FOR ) {
 return 1;
 }
 p = p->dad;
 }
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: 'continue' not in 'for' or 'while' statement!\n",
 item->filename, item->startline, item->endline);
 errs++;

 return 0;
}

static struct pval *in_macro(pval *item)
{
 struct pval *curr;
 curr = item;
 while( curr ) {
 if( curr->type == PV_MACRO ) {
 return curr;
 }
 curr = curr->dad;
 }
 return 0;
}

static struct pval *in_context(pval *item)
{
 struct pval *curr;
 curr = item;
 while( curr ) {
 if( curr->type == PV_MACRO || curr->type == PV_CONTEXT ) {
 return curr;
 }
 curr = curr->dad;
 }
 return 0;
}


/* general purpose goto finder */

static void check_label(pval *item)
{
 struct pval *curr;
 struct pval *x;
 int alright = 0;

 /* A label outside an extension just plain does not make sense! */

 curr = item;

 while( curr ) {
 if( curr->type == PV_MACRO || curr->type == PV_EXTENSION ) {
 alright = 1;
 break;
 }
 curr = curr->dad;
 }
 if( !alright )
 {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: Label %s is not within an extension or macro!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 errs++;
 }


 /* basically, ensure that a label is not repeated in a context. Period.
 The method: well, for each label, find the first label in the context
 with the same name. If it's not the current label, then throw an error. */


 /* printf("==== check_label: ====\n"); */
 if( !current_extension )
 curr = current_context;
 else
 curr = current_extension;

 x = find_first_label_in_current_context((char *)item->u1.str, curr);
 /* printf("Hey, check_label found with item = %x, and x is %x, and currcont is %x, label name is %s\n", item,x, current_context, (char *)item->u1.str); */
 if( x && x != item )
 {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: Duplicate label %s! Previously defined at file %s, line %d.\n",
 item->filename, item->startline, item->endline, item->u1.str, x->filename, x->startline);
 errs++;
 }
 /* printf("<<<<< check_label: ====\n"); */
}

static pval *get_goto_target(pval *item)
{
 /* just one item-- the label should be in the current extension */
 pval *curr_ext = get_extension_or_contxt(item); /* containing exten, or macro */
 pval *curr_cont;

 if (!item->u1.list) {
 return NULL;
 }

 if (!item->u1.list->next && !strstr((item->u1.list)->u1.str,"${")) {
 struct pval *x = find_label_in_current_extension((char*)((item->u1.list)->u1.str), curr_ext);
 return x;
 }

 curr_cont = get_contxt(item);

 /* TWO items */
 if (item->u1.list->next && !item->u1.list->next->next) {
 if (!strstr((item->u1.list)->u1.str,"${")
 && !strstr(item->u1.list->next->u1.str,"${") ) /* Don't try to match variables */ {
 struct pval *x = find_label_in_current_context((char *)item->u1.list->u1.str, (char *)item->u1.list->next->u1.str, curr_cont);
 return x;
 }
 }

 /* All 3 items! */
 if (item->u1.list->next && item->u1.list->next->next) {
 /* all three */
 pval *first = item->u1.list;
 pval *second = item->u1.list->next;
 pval *third = item->u1.list->next->next;

 if (!strstr((item->u1.list)->u1.str,"${")
 && !strstr(item->u1.list->next->u1.str,"${")
 && !strstr(item->u1.list->next->next->u1.str,"${")) /* Don't try to match variables */ {
 struct pval *x = find_label_in_current_db((char*)first->u1.str, (char*)second->u1.str, (char*)third->u1.str);
 if (!x) {

 struct pval *p3;
 struct pval *that_context = find_context(item->u1.list->u1.str);

 /* the target of the goto could be in an included context!! Fancy that!! */
 /* look for includes in the current context */
 if (that_context) {
 for (p3=that_context->u2.statements; p3; p3=p3->next) {
 if (p3->type == PV_INCLUDES) {
 struct pval *p4;
 for (p4=p3->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 char *incl_context = p4->u1.str;
 /* find a matching context name */
 struct pval *that_other_context = find_context(incl_context);
 if (that_other_context) {
 struct pval *x3;
 x3 = find_label_in_current_context((char *)item->u1.list->next->u1.str, (char *)item->u1.list->next->next->u1.str, that_other_context);
 if (x3) {
 return x3;
 }
 }
 }
 }
 }
 }
 }
 return x;
 }
 }
 return NULL;
}

static void check_goto(pval *item)
{
 if (!item->u1.list) {
 return;
 }

 /* check for the target of the goto-- does it exist? */
 if ( !(item->u1.list)->next && !(item->u1.list)->u1.str ) {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: goto: empty label reference found!\n",
 item->filename, item->startline, item->endline);
 errs++;
 }

 /* just one item-- the label should be in the current extension */
 if (!item->u1.list->next && !strstr(item->u1.list->u1.str,"${")) {
 struct pval *z = get_extension_or_contxt(item);
 struct pval *x = 0;
 if (z)
 x = find_label_in_current_extension((char*)((item->u1.list)->u1.str), z); /* if in macro, use current context instead */
 /* printf("Called find_label_in_current_extension with arg %s; current_extension is %x: %d\n",
 (char*)((item->u1.list)->u1.str), current_extension?current_extension:current_context, current_extension?current_extension->type:current_context->type); */
 if (!x) {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: goto: no label %s exists in the current extension!\n",
 item->filename, item->startline, item->endline, item->u1.list->u1.str);
 errs++;
 }
 else
 return;
 }

 /* TWO items */
 if (item->u1.list->next && !item->u1.list->next->next) {
 /* two items */
 /* printf("Calling find_label_in_current_context with args %s, %s\n",
 (char*)((item->u1.list)->u1.str), (char *)item->u1.list->next->u1.str); */
 if (!strstr((item->u1.list)->u1.str,"${")
 && !strstr(item->u1.list->next->u1.str,"${") ) /* Don't try to match variables */ {
 struct pval *z = get_contxt(item);
 struct pval *x = 0;

 if (z)
 x = find_label_in_current_context((char *)item->u1.list->u1.str, (char *)item->u1.list->next->u1.str, z);

 if (!x) {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: goto: no label '%s,%s' exists in the current context, or any of its inclusions!\n",
 item->filename, item->startline, item->endline, item->u1.list->u1.str, item->u1.list->next->u1.str );
 errs++;
 }
 else
 return;
 }
 }

 /* All 3 items! */
 if (item->u1.list->next && item->u1.list->next->next) {
 /* all three */
 pval *first = item->u1.list;
 pval *second = item->u1.list->next;
 pval *third = item->u1.list->next->next;

 /* printf("Calling find_label_in_current_db with args %s, %s, %s\n",
 (char*)first->u1.str, (char*)second->u1.str, (char*)third->u1.str); */
 if (!strstr((item->u1.list)->u1.str,"${")
 && !strstr(item->u1.list->next->u1.str,"${")
 && !strstr(item->u1.list->next->next->u1.str,"${")) /* Don't try to match variables */ {
 struct pval *x = find_label_in_current_db((char*)first->u1.str, (char*)second->u1.str, (char*)third->u1.str);
 if (!x) {
 struct pval *p3;
 struct pval *found = 0;
 struct pval *that_context = find_context(item->u1.list->u1.str);

 /* the target of the goto could be in an included context!! Fancy that!! */
 /* look for includes in the current context */
 if (that_context) {
 for (p3=that_context->u2.statements; p3; p3=p3->next) {
 if (p3->type == PV_INCLUDES) {
 struct pval *p4;
 for (p4=p3->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 char *incl_context = p4->u1.str;
 /* find a matching context name */
 struct pval *that_other_context = find_context(incl_context);
 if (that_other_context) {
 struct pval *x3;
 x3 = find_label_in_current_context((char *)item->u1.list->next->u1.str, (char *)item->u1.list->next->next->u1.str, that_other_context);
 if (x3) {
 found = x3;
 break;
 }
 }
 }
 }
 }
 if (!found) {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: goto: no label %s|%s exists in the context %s or its inclusions!\n",
 item->filename, item->startline, item->endline, item->u1.list->next->u1.str, item->u1.list->next->next->u1.str, item->u1.list->u1.str );
 errs++;
 } else {
 struct pval *mac = in_macro(item); /* is this goto inside a macro? */
 if( mac ) { /* yes! */
 struct pval *targ = in_context(found);
 if( mac != targ )
 {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: It's bad form to have a goto in a macro to a target outside the macro!\n",
 item->filename, item->startline, item->endline);
 warns++;
 }
 }
 }
 } else {
 /* here is where code would go to check for target existence in extensions.conf files */
#ifdef STANDALONE
 struct pbx_find_info pfiq = {.stacklen = 0 };
 extern int localized_pbx_load_module(void);
 /* if this is a standalone, we will need to make sure the
 localized load of extensions.conf is done */
 if (!extensions_dot_conf_loaded) {
 localized_pbx_load_module();
 extensions_dot_conf_loaded++;
 }

 pbx_find_extension(NULL, NULL, &pfiq, first->u1.str, second->u1.str, atoi(third->u1.str),
 atoi(third->u1.str) ? NULL : third->u1.str, NULL,
 atoi(third->u1.str) ? E_MATCH : E_FINDLABEL);

 if (pfiq.status != STATUS_SUCCESS) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: goto: Couldn't find goto target %s|%s|%s, not even in extensions.conf!\n",
 item->filename, item->startline, item->endline, first->u1.str, second->u1.str, third->u1.str);
 warns++;
 }
#else
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: goto: Couldn't find goto target %s|%s|%s in the AEL code!\n",
 item->filename, item->startline, item->endline, first->u1.str, second->u1.str, third->u1.str);
 warns++;
#endif
 }
 } else {
 struct pval *mac = in_macro(item); /* is this goto inside a macro? */
 if( mac ) { /* yes! */
 struct pval *targ = in_context(x);
 if( mac != targ )
 {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: It's bad form to have a goto in a macro to a target outside the macro!\n",
 item->filename, item->startline, item->endline);
 warns++;
 }
 }
 }
 }
 }
}


static void find_pval_goto_item(pval *item, int lev)
{
 struct pval *p4;

 if (lev>100) {
 ast_log(LOG_ERROR,"find_pval_goto in infinite loop! item_type: %u\n\n", item->type);
 return;
 }

 switch ( item->type ) {
 case PV_MACRO:
 /* fields: item->u1.str == name of macro
 item->u2.arglist == pval list of PV_WORD arguments of macro, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg

 item->u3.macro_statements == pval list of statements in macro body.
 */

 /* printf("Descending into macro %s at line %d\n", item->u1.str, item->startline); */
 find_pval_gotos(item->u3.macro_statements,lev+1); /* if we're just searching for a context, don't bother descending into them */

 break;

 case PV_CONTEXT:
 /* fields: item->u1.str == name of context
 item->u2.statements == pval list of statements in context body
 item->u3.abstract == int 1 if an abstract keyword were present
 */
 break;

 case PV_CASE:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* printf("Descending into Case of %s\n", item->u1.str); */
 find_pval_gotos(item->u2.statements,lev+1);
 break;

 case PV_PATTERN:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* printf("Descending into Pattern of %s\n", item->u1.str); */
 find_pval_gotos(item->u2.statements,lev+1);
 break;

 case PV_DEFAULT:
 /* fields:
 item->u2.statements == pval list of statements under the case
 */
 /* printf("Descending into default\n"); */
 find_pval_gotos(item->u2.statements,lev+1);
 break;

 case PV_CATCH:
 /* fields: item->u1.str == name of extension to catch
 item->u2.statements == pval list of statements in context body
 */
 /* printf("Descending into catch of %s\n", item->u1.str); */
 find_pval_gotos(item->u2.statements,lev+1);
 break;

 case PV_STATEMENTBLOCK:
 /* fields: item->u1.list == pval list of statements in block, one per entry in the list
 */
 /* printf("Descending into statement block\n"); */
 find_pval_gotos(item->u1.list,lev+1);
 break;

 case PV_GOTO:
 /* fields: item->u1.list == pval list of PV_WORD target names, up to 3, in order as given by user.
 item->u1.list->u1.str == where the data on a PV_WORD will always be.
 */
 check_goto(item); /* THE WHOLE FUNCTION OF THIS ENTIRE ROUTINE!!!! */
 break;

 case PV_INCLUDES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 for (p4=item->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 char *incl_context = p4->u1.str;
 /* find a matching context name */
 struct pval *that_context = find_context(incl_context);
 if (that_context && that_context->u2.statements) {
 /* printf("Descending into include of '%s' at line %d; that_context=%s, that_context type=%d\n", incl_context, item->startline, that_context->u1.str, that_context->type); */
 find_pval_gotos(that_context->u2.statements,lev+1); /* keep working up the includes */
 }
 }
 break;

 case PV_FOR:
 /* fields: item->u1.for_init == a string containing the initalizer
 item->u2.for_test == a string containing the loop test
 item->u3.for_inc == a string containing the loop increment

 item->u4.for_statements == a pval list of statements in the for ()
 */
 /* printf("Descending into for at line %d\n", item->startline); */
 find_pval_gotos(item->u4.for_statements,lev+1);
 break;

 case PV_WHILE:
 /* fields: item->u1.str == the while conditional, as supplied by user

 item->u2.statements == a pval list of statements in the while ()
 */
 /* printf("Descending into while at line %d\n", item->startline); */
 find_pval_gotos(item->u2.statements,lev+1);
 break;

 case PV_RANDOM:
 /* fields: item->u1.str == the random number expression, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 fall thru to PV_IF */

 case PV_IFTIME:
 /* fields: item->u1.list == the time values, 4 of them, as PV_WORD structs in a list

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 fall thru to PV_IF*/
 case PV_IF:
 /* fields: item->u1.str == the if conditional, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 /* printf("Descending into random/iftime/if at line %d\n", item->startline); */
 find_pval_gotos(item->u2.statements,lev+1);

 if (item->u3.else_statements) {
 /* printf("Descending into random/iftime/if's ELSE at line %d\n", item->startline); */
 find_pval_gotos(item->u3.else_statements,lev+1);
 }
 break;

 case PV_SWITCH:
 /* fields: item->u1.str == the switch expression

 item->u2.statements == a pval list of statements in the switch,
 (will be case statements, most likely!)
 */
 /* printf("Descending into switch at line %d\n", item->startline); */
 find_pval_gotos(item->u3.else_statements,lev+1);
 break;

 case PV_EXTENSION:
 /* fields: item->u1.str == the extension name, label, whatever it's called

 item->u2.statements == a pval list of statements in the extension
 item->u3.hints == a char * hint argument
 item->u4.regexten == an int boolean. non-zero says that regexten was specified
 */

 /* printf("Descending into extension %s at line %d\n", item->u1.str, item->startline); */
 find_pval_gotos(item->u2.statements,lev+1);
 break;

 default:
 break;
 }
}

static void find_pval_gotos(pval *item,int lev)
{
 pval *i;

 for (i=item; i; i=i->next) {
 /* printf("About to call pval_goto_item, itemcount=%d, itemtype=%d\n", item_count, i->type); */
 find_pval_goto_item(i, lev);
 }
}



/* general purpose label finder */
static struct pval *match_pval_item(pval *item)
{
 pval *x;

 switch ( item->type ) {
 case PV_MACRO:
 /* fields: item->u1.str == name of macro
 item->u2.arglist == pval list of PV_WORD arguments of macro, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg

 item->u3.macro_statements == pval list of statements in macro body.
 */
 /* printf(" matching in MACRO %s, match_context=%s; retoncontmtch=%d; \n", item->u1.str, match_context, return_on_context_match); */
 if (!strcmp(match_context,"*") || !strcmp(item->u1.str, match_context)) {

 /* printf("MACRO: match context is: %s\n", match_context); */

 if (return_on_context_match && !strcmp(item->u1.str, match_context)) /* if we're just searching for a context, don't bother descending into them */ {
 /* printf("Returning on matching macro %s\n", match_context); */
 return item;
 }


 if (!return_on_context_match) {
 /* printf("Descending into matching macro %s/%s\n", match_context, item->u1.str); */
 if ((x=match_pval(item->u3.macro_statements))) {
 /* printf("Responded with pval match %x\n", x); */
 return x;
 }
 }
 } else {
 /* printf("Skipping context/macro %s\n", item->u1.str); */
 }

 break;

 case PV_CONTEXT:
 /* fields: item->u1.str == name of context
 item->u2.statements == pval list of statements in context body
 item->u3.abstract == int 1 if an abstract keyword were present
 */
 /* printf(" matching in CONTEXT\n"); */
 if (!strcmp(match_context,"*") || !strcmp(item->u1.str, match_context)) {
 if (return_on_context_match && !strcmp(item->u1.str, match_context)) {
 /* printf("Returning on matching context %s\n", match_context); */
 /* printf("non-CONTEXT: Responded with pval match %x\n", x); */
 return item;
 }

 if (!return_on_context_match ) {
 /* printf("Descending into matching context %s\n", match_context); */
 if ((x=match_pval(item->u2.statements))) /* if we're just searching for a context, don't bother descending into them */ {
 /* printf("CONTEXT: Responded with pval match %x\n", x); */
 return x;
 }
 }
 } else {
 /* printf("Skipping context/macro %s\n", item->u1.str); */
 }
 break;

 case PV_CASE:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* printf(" matching in CASE\n"); */
 if ((x=match_pval(item->u2.statements))) {
 /* printf("CASE: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_PATTERN:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* printf(" matching in PATTERN\n"); */
 if ((x=match_pval(item->u2.statements))) {
 /* printf("PATTERN: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_DEFAULT:
 /* fields:
 item->u2.statements == pval list of statements under the case
 */
 /* printf(" matching in DEFAULT\n"); */
 if ((x=match_pval(item->u2.statements))) {
 /* printf("DEFAULT: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_CATCH:
 /* fields: item->u1.str == name of extension to catch
 item->u2.statements == pval list of statements in context body
 */
 /* printf(" matching in CATCH\n"); */
 if ((x=match_pval(item->u2.statements))) {
 /* printf("CATCH: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_STATEMENTBLOCK:
 /* fields: item->u1.list == pval list of statements in block, one per entry in the list
 */
 /* printf(" matching in STATEMENTBLOCK\n"); */
 if ((x=match_pval(item->u1.list))) {
 /* printf("STATEMENTBLOCK: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_LABEL:
 /* fields: item->u1.str == label name
 */
 /* printf("PV_LABEL %s (cont=%s, exten=%s\n",
 item->u1.str, current_context->u1.str, (current_extension?current_extension->u1.str:"<macro>"));*/

 if (count_labels) {
 if (!strcmp(match_label, item->u1.str)) {
 label_count++;
 last_matched_label = item;
 }

 } else {
 if (!strcmp(match_label, item->u1.str)) {
 /* printf("LABEL: Responded with pval match %x\n", x); */
 return item;
 }
 }
 break;

 case PV_FOR:
 /* fields: item->u1.for_init == a string containing the initalizer
 item->u2.for_test == a string containing the loop test
 item->u3.for_inc == a string containing the loop increment

 item->u4.for_statements == a pval list of statements in the for ()
 */
 /* printf(" matching in FOR\n"); */
 if ((x=match_pval(item->u4.for_statements))) {
 /* printf("FOR: Responded with pval match %x\n", x);*/
 return x;
 }
 break;

 case PV_WHILE:
 /* fields: item->u1.str == the while conditional, as supplied by user

 item->u2.statements == a pval list of statements in the while ()
 */
 /* printf(" matching in WHILE\n"); */
 if ((x=match_pval(item->u2.statements))) {
 /* printf("WHILE: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_RANDOM:
 /* fields: item->u1.str == the random number expression, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 fall thru to PV_IF */

 case PV_IFTIME:
 /* fields: item->u1.list == the time values, 4 of them, as PV_WORD structs in a list

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 fall thru to PV_IF*/
 case PV_IF:
 /* fields: item->u1.str == the if conditional, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 /* printf(" matching in IF/IFTIME/RANDOM\n"); */
 if ((x=match_pval(item->u2.statements))) {
 return x;
 }
 if (item->u3.else_statements) {
 if ((x=match_pval(item->u3.else_statements))) {
 /* printf("IF/IFTIME/RANDOM: Responded with pval match %x\n", x); */
 return x;
 }
 }
 break;

 case PV_SWITCH:
 /* fields: item->u1.str == the switch expression

 item->u2.statements == a pval list of statements in the switch,
 (will be case statements, most likely!)
 */
 /* printf(" matching in SWITCH\n"); */
 if ((x=match_pval(item->u2.statements))) {
 /* printf("SWITCH: Responded with pval match %x\n", x); */
 return x;
 }
 break;

 case PV_EXTENSION:
 /* fields: item->u1.str == the extension name, label, whatever it's called

 item->u2.statements == a pval list of statements in the extension
 item->u3.hints == a char * hint argument
 item->u4.regexten == an int boolean. non-zero says that regexten was specified
 */
 /* printf(" matching in EXTENSION\n"); */
 if (!strcmp(match_exten,"*") || extension_matches(item, match_exten, item->u1.str) ) {
 /* printf("Descending into matching exten %s => %s\n", match_exten, item->u1.str); */
 if (strcmp(match_label,"1") == 0) {
 if (item->u2.statements) {
 struct pval *p5 = item->u2.statements;
 while (p5 && p5->type == PV_LABEL) /* find the first non-label statement in this context. If it exists, there's a "1" */
 p5 = p5->next;
 if (p5)
 return p5;
 else
 return 0;
 }
 else
 return 0;
 }

 if ((x=match_pval(item->u2.statements))) {
 /* printf("EXTENSION: Responded with pval match %x\n", x); */
 return x;
 }
 } else {
 /* printf("Skipping exten %s\n", item->u1.str); */
 }
 break;
 default:
 /* printf(" matching in default = %d\n", item->type); */
 break;
 }
 return 0;
}

struct pval *match_pval(pval *item)
{
 pval *i;

 for (i=item; i; i=i->next) {
 pval *x;
 /* printf(" -- match pval: item %d\n", i->type); */

 if ((x = match_pval_item(i))) {
 /* printf("match_pval: returning x=%x\n", (int)x); */
 return x; /* cut the search short */
 }
 }
 return 0;
}

#if 0
int count_labels_in_current_context(char *label)
{
 label_count = 0;
 count_labels = 1;
 return_on_context_match = 0;
 match_pval(current_context->u2.statements);

 return label_count;
}
#endif

struct pval *find_first_label_in_current_context(char *label, pval *curr_cont)
{
 /* printf(" --- Got args %s, %s\n", exten, label); */
 struct pval *ret;
 struct pval *p3;

 count_labels = 0;
 return_on_context_match = 0;
 match_context = "*";
 match_exten = "*";
 match_label = label;

 ret = match_pval(curr_cont);
 if (ret)
 return ret;

 /* the target of the goto could be in an included context!! Fancy that!! */
 /* look for includes in the current context */
 for (p3=curr_cont->u2.statements; p3; p3=p3->next) {
 if (p3->type == PV_INCLUDES) {
 struct pval *p4;
 for (p4=p3->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 char *incl_context = p4->u1.str;
 /* find a matching context name */
 struct pval *that_context = find_context(incl_context);
 if (that_context) {
 struct pval *x3;
 x3 = find_first_label_in_current_context(label, that_context);
 if (x3) {
 return x3;
 }
 }
 }
 }
 }
 return 0;
}

struct pval *find_label_in_current_context(char *exten, char *label, pval *curr_cont)
{
 /* printf(" --- Got args %s, %s\n", exten, label); */
 struct pval *ret;
 struct pval *p3;

 count_labels = 0;
 return_on_context_match = 0;
 match_context = "*";
 match_exten = exten;
 match_label = label;
 ret = match_pval(curr_cont->u2.statements);
 if (ret)
 return ret;

 /* the target of the goto could be in an included context!! Fancy that!! */
 /* look for includes in the current context */
 for (p3=curr_cont->u2.statements; p3; p3=p3->next) {
 if (p3->type == PV_INCLUDES) {
 struct pval *p4;
 for (p4=p3->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 char *incl_context = p4->u1.str;
 /* find a matching context name */
 struct pval *that_context = find_context(incl_context);
 if (that_context) {
 struct pval *x3;
 x3 = find_label_in_current_context(exten, label, that_context);
 if (x3) {
 return x3;
 }
 }
 }
 }
 }
 return 0;
}

static struct pval *find_label_in_current_extension(const char *label, pval *curr_ext)
{
 /* printf(" --- Got args %s\n", label); */
 count_labels = 0;
 return_on_context_match = 0;
 match_context = "*";
 match_exten = "*";
 match_label = label;
 return match_pval(curr_ext);
}

static struct pval *find_label_in_current_db(const char *context, const char *exten, const char *label)
{
 /* printf(" --- Got args %s, %s, %s\n", context, exten, label); */
 count_labels = 0;
 return_on_context_match = 0;

 match_context = context;
 match_exten = exten;
 match_label = label;

 return match_pval(current_db);
}


struct pval *find_macro(char *name)
{
 return_on_context_match = 1;
 count_labels = 0;
 match_context = name;
 match_exten = "*"; /* don't really need to set these, shouldn't be reached */
 match_label = "*";
 return match_pval(current_db);
}

struct pval *find_context(char *name)
{
 return_on_context_match = 1;
 count_labels = 0;
 match_context = name;
 match_exten = "*"; /* don't really need to set these, shouldn't be reached */
 match_label = "*";
 return match_pval(current_db);
}

int is_float(char *arg )
{
 char *s;
 for (s=arg; *s; s++) {
 if (*s != '.' && (*s < '0' || *s > '9'))
 return 0;
 }
 return 1;
}
int is_int(char *arg )
{
 char *s;
 for (s=arg; *s; s++) {
 if (*s < '0' || *s > '9')
 return 0;
 }
 return 1;
}
int is_empty(char *arg)
{
 if (!arg)
 return 1;
 if (*arg == 0)
 return 1;
 while (*arg) {
 if (*arg != ' ' && *arg != '\t')
 return 0;
 arg++;
 }
 return 1;
}

#ifdef AAL_ARGCHECK
int option_matches_j( struct argdesc *should, pval *is, struct argapp *app)
{
 struct argchoice *ac;
 char *opcop,*q,*p;

 switch (should->dtype) {
 case ARGD_OPTIONSET:
 if ( strstr(is->u1.str,"${") )
 return 0; /* no checking anything if there's a var reference in there! */

 opcop = ast_strdupa(is->u1.str);

 for (q=opcop;*q;q++) { /* erase the innards of X(innard) type arguments, so we don't get confused later */
 if ( *q == '(' ) {
 p = q+1;
 while (*p && *p != ')' )
 *p++ = '+';
 q = p+1;
 }
 }

 for (ac=app->opts; ac; ac=ac->next) {
 if (strlen(ac->name)>1 && strchr(ac->name,'(') == 0 && strcmp(ac->name,is->u1.str) == 0) /* multichar option, no parens, and a match? */
 return 0;
 }
 for (ac=app->opts; ac; ac=ac->next) {
 if (strlen(ac->name)==1 || strchr(ac->name,'(')) {
 char *p = strchr(opcop,ac->name[0]); /* wipe out all matched options in the user-supplied string */

 if (p && *p == 'j') {
 ast_log(LOG_ERROR, "Error: file %s, line %d-%d: The j option in the %s application call is not appropriate for AEL!\n",
 is->filename, is->startline, is->endline, app->name);
 errs++;
 }

 if (p) {
 *p = '+';
 if (ac->name[1] == '(') {
 if (*(p+1) != '(') {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The %c option in the %s application call should have an (argument), but doesn't!\n",
 is->filename, is->startline, is->endline, ac->name[0], app->name);
 warns++;
 }
 }
 }
 }
 }
 for (q=opcop; *q; q++) {
 if ( *q != '+' && *q != '(' && *q != ')') {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: The %c option in the %s application call is not available as an option!\n",
 is->filename, is->startline, is->endline, *q, app->name);
 warns++;
 }
 }
 return 1;
 break;
 default:
 return 0;
 }

}

int option_matches( struct argdesc *should, pval *is, struct argapp *app)
{
 struct argchoice *ac;
 char *opcop;

 switch (should->dtype) {
 case ARGD_STRING:
 if (is_empty(is->u1.str) && should->type == ARGD_REQUIRED)
 return 0;
 if (is->u1.str && strlen(is->u1.str) > 0) /* most will match */
 return 1;
 break;

 case ARGD_INT:
 if (is_int(is->u1.str))
 return 1;
 else
 return 0;
 break;

 case ARGD_FLOAT:
 if (is_float(is->u1.str))
 return 1;
 else
 return 0;
 break;

 case ARGD_ENUM:
 if( !is->u1.str || strlen(is->u1.str) == 0 )
 return 1; /* a null arg in the call will match an enum, I guess! */
 for (ac=should->choices; ac; ac=ac->next) {
 if (strcmp(ac->name,is->u1.str) == 0)
 return 1;
 }
 return 0;
 break;

 case ARGD_OPTIONSET:
 opcop = ast_strdupa(is->u1.str);

 for (ac=app->opts; ac; ac=ac->next) {
 if (strlen(ac->name)>1 && strchr(ac->name,'(') == 0 && strcmp(ac->name,is->u1.str) == 0) /* multichar option, no parens, and a match? */
 return 1;
 }
 for (ac=app->opts; ac; ac=ac->next) {
 if (strlen(ac->name)==1 || strchr(ac->name,'(')) {
 char *p = strchr(opcop,ac->name[0]); /* wipe out all matched options in the user-supplied string */

 if (p) {
 *p = '+';
 if (ac->name[1] == '(') {
 if (*(p+1) == '(') {
 char *q = p+1;
 while (*q && *q != ')') {
 *q++ = '+';
 }
 *q = '+';
 }
 }
 }
 }
 }
 return 1;
 break;
 case ARGD_VARARG:
 return 1; /* matches anything */
 break;
 }
 return 1; /* unless some for-sure match or non-match returns, then it must be close enough ... */
}
#endif

int check_app_args(pval* appcall, pval *arglist, struct argapp *app)
{
#ifdef AAL_ARGCHECK
 struct argdesc *ad = app->args;
 pval *pa;
 int z;

 for (pa = arglist; pa; pa=pa->next) {
 if (!ad) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: Extra argument %s not in application call to %s !\n",
 arglist->filename, arglist->startline, arglist->endline, pa->u1.str, app->name);
 warns++;
 return 1;
 } else {
 /* find the first entry in the ad list that will match */
 do {
 if ( ad->dtype == ARGD_VARARG ) /* once we hit the VARARG, all bets are off. Discontinue the comparisons */
 break;

 z= option_matches( ad, pa, app);
 if (!z) {
 if ( !arglist )
 arglist=appcall;

 if (ad->type == ARGD_REQUIRED) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: Required argument %s not in application call to %s !\n",
 arglist->filename, arglist->startline, arglist->endline, ad->dtype==ARGD_OPTIONSET?"options":ad->name, app->name);
 warns++;
 return 1;
 }
 } else if (z && ad->dtype == ARGD_OPTIONSET) {
 option_matches_j( ad, pa, app);
 }
 ad = ad->next;
 } while (ad && !z);
 }
 }
 /* any app nodes left, that are not optional? */
 for ( ; ad; ad=ad->next) {
 if (ad->type == ARGD_REQUIRED && ad->dtype != ARGD_VARARG) {
 if ( !arglist )
 arglist=appcall;
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: Required argument %s not in application call to %s !\n",
 arglist->filename, arglist->startline, arglist->endline, ad->dtype==ARGD_OPTIONSET?"options":ad->name, app->name);
 warns++;
 return 1;
 }
 }
 return 0;
#else
 return 0;
#endif
}

void check_switch_expr(pval *item, struct argapp *apps)
{
#ifdef AAL_ARGCHECK
 /* get and clean the variable name */
 char *buff1, *p;
 struct argapp *a,*a2;
 struct appsetvar *v,*v2;
 struct argchoice *c;
 pval *t;

 p = item->u1.str;
 while (p && *p && (*p == ' ' || *p == '\t' || *p == '$' || *p == '{' ) )
 p++;

 buff1 = ast_strdupa(p);

 while (strlen(buff1) > 0 && ( buff1[strlen(buff1)-1] == '}' || buff1[strlen(buff1)-1] == ' ' || buff1[strlen(buff1)-1] == '\t'))
 buff1[strlen(buff1)-1] = 0;
 /* buff1 now contains the variable name */
 v = 0;
 for (a=apps; a; a=a->next) {
 for (v=a->setvars;v;v=v->next) {
 if (strcmp(v->name,buff1) == 0) {
 break;
 }
 }
 if ( v )
 break;
 }
 if (v && v->vals) {
 /* we have a match, to a variable that has a set of determined values */
 int def= 0;
 int pat = 0;
 int f1 = 0;

 /* first of all, does this switch have a default case ? */
 for (t=item->u2.statements; t; t=t->next) {
 if (t->type == PV_DEFAULT) {
 def =1;
 break;
 }
 if (t->type == PV_PATTERN) {
 pat++;
 }
 }
 if (def || pat) /* nothing to check. All cases accounted for! */
 return;
 for (c=v->vals; c; c=c->next) {
 f1 = 0;
 for (t=item->u2.statements; t; t=t->next) {
 if (t->type == PV_CASE || t->type == PV_PATTERN) {
 if (!strcmp(t->u1.str,c->name)) {
 f1 = 1;
 break;
 }
 }
 }
 if (!f1) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: switch with expression(%s) does not handle the case of %s !\n",
 item->filename, item->startline, item->endline, item->u1.str, c->name);
 warns++;
 }
 }
 /* next, is there an app call in the current exten, that would set this var? */
 f1 = 0;
 t = current_extension->u2.statements;
 if ( t && t->type == PV_STATEMENTBLOCK )
 t = t->u1.statements;
 for (; t && t != item; t=t->next) {
 if (t->type == PV_APPLICATION_CALL) {
 /* find the application that matches the u1.str */
 for (a2=apps; a2; a2=a2->next) {
 if (strcasecmp(a2->name, t->u1.str)==0) {
 for (v2=a2->setvars; v2; v2=v2->next) {
 if (strcmp(v2->name, buff1) == 0) {
 /* found an app that sets the var */
 f1 = 1;
 break;
 }
 }
 }
 if (f1)
 break;
 }
 }
 if (f1)
 break;
 }

 /* see if it sets the var */
 if (!f1) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: Couldn't find an application call in this extension that sets the expression (%s) value!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }
 }
#else
 pval *t,*tl=0,*p2;
 int def= 0;

 /* first of all, does this switch have a default case ? */
 for (t=item->u2.statements; t; t=t->next) {
 if (t->type == PV_DEFAULT) {
 def =1;
 break;
 }
 tl = t;
 }
 if (def) /* nothing to check. All cases accounted for! */
 return;
 /* if no default, warn and insert a default case at the end */
 p2 = tl->next = calloc(1, sizeof(struct pval));

 p2->type = PV_DEFAULT;
 p2->startline = tl->startline;
 p2->endline = tl->endline;
 p2->startcol = tl->startcol;
 p2->endcol = tl->endcol;
 p2->filename = strdup(tl->filename);
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: A default case was automatically added to the switch.\n",
 p2->filename, p2->startline, p2->endline);
 warns++;

#endif
}

static void check_context_names(void)
{
 pval *i,*j;
 for (i=current_db; i; i=i->next) {
 if (i->type == PV_CONTEXT || i->type == PV_MACRO) {
 for (j=i->next; j; j=j->next) {
 if ( j->type == PV_CONTEXT || j->type == PV_MACRO ) {
 if ( !strcmp(i->u1.str, j->u1.str) && !(i->u3.abstract&2) && !(j->u3.abstract&2) )
 {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: The context name (%s) is also declared in file %s, line %d-%d! (and neither is marked 'extend')\n",
 i->filename, i->startline, i->endline, i->u1.str, j->filename, j->startline, j->endline);
 warns++;
 }
 }
 }
 }
 }
}

static void check_abstract_reference(pval *abstract_context)
{
 pval *i,*j;
 /* find some context includes that reference this context */


 /* otherwise, print out a warning */
 for (i=current_db; i; i=i->next) {
 if (i->type == PV_CONTEXT) {
 for (j=i->u2. statements; j; j=j->next) {
 if ( j->type == PV_INCLUDES ) {
 struct pval *p4;
 for (p4=j->u1.list; p4; p4=p4->next) {
 /* for each context pointed to, find it, then find a context/label that matches the
 target here! */
 if ( !strcmp(p4->u1.str, abstract_context->u1.str) )
 return; /* found a match! */
 }
 }
 }
 }
 }
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: Couldn't find a reference to this abstract context (%s) in any other context!\n",
 abstract_context->filename, abstract_context->startline, abstract_context->endline, abstract_context->u1.str);
 warns++;
}


void check_pval_item(pval *item, struct argapp *apps, int in_globals)
{
 pval *lp;
#ifdef AAL_ARGCHECK
 struct argapp *app, *found;
#endif
 struct pval *macro_def;
 struct pval *app_def;

 char errmsg[4096];
 char *strp;

 switch (item->type) {
 case PV_WORD:
 /* fields: item->u1.str == string associated with this (word).
 item->u2.arglist == pval list of 4 PV_WORD elements for time values (only in PV_INCLUDES) */
 break;

 case PV_MACRO:
 /* fields: item->u1.str == name of macro
 item->u2.arglist == pval list of PV_WORD arguments of macro, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg

 item->u3.macro_statements == pval list of statements in macro body.
 */
 in_abstract_context = 0;
 current_context = item;
 current_extension = 0;

 check_macro_returns(item);

 for (lp=item->u2.arglist; lp; lp=lp->next) {

 }
 check_pval(item->u3.macro_statements, apps,in_globals);
 break;

 case PV_CONTEXT:
 /* fields: item->u1.str == name of context
 item->u2.statements == pval list of statements in context body
 item->u3.abstract == int 1 if an abstract keyword were present
 */
 current_context = item;
 current_extension = 0;
 if ( item->u3.abstract ) {
 in_abstract_context = 1;
 check_abstract_reference(item);
 } else
 in_abstract_context = 0;
 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_MACRO_CALL:
 /* fields: item->u1.str == name of macro to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
#ifdef STANDALONE
 /* if this is a standalone, we will need to make sure the
 localized load of extensions.conf is done */
 if (!extensions_dot_conf_loaded) {
 localized_pbx_load_module();
 extensions_dot_conf_loaded++;
 }
#endif
 macro_def = find_macro(item->u1.str);
 if (!macro_def) {
#ifdef STANDALONE
 struct pbx_find_info pfiq = {.stacklen = 0 };
 struct pbx_find_info pfiq2 = {.stacklen = 0 };

 /* look for the macro in the extensions.conf world */
 pbx_find_extension(NULL, NULL, &pfiq, item->u1.str, "s", 1, NULL, NULL, E_MATCH);

 if (pfiq.status != STATUS_SUCCESS) {
 char namebuf2[256];
 snprintf(namebuf2, 256, "macro-%s", item->u1.str);

 /* look for the macro in the extensions.conf world */
 pbx_find_extension(NULL, NULL, &pfiq2, namebuf2, "s", 1, NULL, NULL, E_MATCH);

 if (pfiq2.status == STATUS_SUCCESS) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: macro call to non-existent %s! (macro-%s was found in the extensions.conf stuff, but we are using gosubs!)\n",
 item->filename, item->startline, item->endline, item->u1.str, item->u1.str);
 warns++;
 } else {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: macro call to non-existent %s! (Not even in the extensions.conf stuff!)\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }
 }
#else
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: macro call to %s cannot be found in the AEL code!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;

#endif
#ifdef THIS_IS_1DOT4
 char namebuf2[256];
 snprintf(namebuf2, 256, "macro-%s", item->u1.str);

 /* look for the macro in the extensions.conf world */
 pbx_find_extension(NULL, NULL, &pfiq, namebuf2, "s", 1, NULL, NULL, E_MATCH);

 if (pfiq.status != STATUS_SUCCESS) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: macro call to %s was not found in the AEL, nor the extensions.conf !\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }

#endif

 } else if (macro_def->type != PV_MACRO) {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: macro call to %s references a context, not a macro!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 errs++;
 } else {
 /* macro_def is a MACRO, so do the args match in number? */
 int hereargs = 0;
 int thereargs = 0;

 for (lp=item->u2.arglist; lp; lp=lp->next) {
 hereargs++;
 }
 for (lp=macro_def->u2.arglist; lp; lp=lp->next) {
 thereargs++;
 }
 if (hereargs != thereargs ) {
 ast_log(LOG_ERROR, "Error: file %s, line %d-%d: The macro call to %s has %d arguments, but the macro definition has %d arguments\n",
 item->filename, item->startline, item->endline, item->u1.str, hereargs, thereargs);
 errs++;
 }
 }
 break;

 case PV_APPLICATION_CALL:
 /* fields: item->u1.str == name of application to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 /* Need to check to see if the application is available! */
 app_def = find_context(item->u1.str);
 if (app_def && app_def->type == PV_MACRO) {
 ast_log(LOG_ERROR,"Error: file %s, line %d-%d: application call to %s references an existing macro, but had no & preceding it!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 errs++;
 }
 if (strcasecmp(item->u1.str,"GotoIf") == 0
 || strcasecmp(item->u1.str,"GotoIfTime") == 0
 || strcasecmp(item->u1.str,"while") == 0
 || strcasecmp(item->u1.str,"endwhile") == 0
 || strcasecmp(item->u1.str,"random") == 0
 || strcasecmp(item->u1.str,"gosub") == 0
 || strcasecmp(item->u1.str,"gosubif") == 0
 || strcasecmp(item->u1.str,"continuewhile") == 0
 || strcasecmp(item->u1.str,"endwhile") == 0
 || strcasecmp(item->u1.str,"execif") == 0
 || strcasecmp(item->u1.str,"execiftime") == 0
 || strcasecmp(item->u1.str,"exitwhile") == 0
 || strcasecmp(item->u1.str,"goto") == 0
 || strcasecmp(item->u1.str,"macro") == 0
 || strcasecmp(item->u1.str,"macroexclusive") == 0
 || strcasecmp(item->u1.str,"macroif") == 0
 || strcasecmp(item->u1.str,"stackpop") == 0
 || strcasecmp(item->u1.str,"execIf") == 0 ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: application call to %s affects flow of control, and needs to be re-written using AEL if, while, goto, etc. keywords instead!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }
 if (strcasecmp(item->u1.str,"macroexit") == 0) {
 ast_log(LOG_WARNING, "Warning: file %s, line %d-%d: I am converting the MacroExit call here to a return statement.\n",
 item->filename, item->startline, item->endline);
 item->type = PV_RETURN;
 free(item->u1.str);
 item->u1.str = 0;
 }

#ifdef AAL_ARGCHECK
 found = 0;
 for (app=apps; app; app=app->next) {
 if (strcasecmp(app->name, item->u1.str) == 0) {
 found =app;
 break;
 }
 }
 if (!found) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: application call to %s not listed in applist database!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 } else
 check_app_args(item, item->u2.arglist, app);
#endif
 break;

 case PV_CASE:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* Make sure sequence of statements under case is terminated with goto, return, or break */
 /* find the last statement */
 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_PATTERN:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* Make sure sequence of statements under case is terminated with goto, return, or break */
 /* find the last statement */

 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_DEFAULT:
 /* fields:
 item->u2.statements == pval list of statements under the case
 */

 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_CATCH:
 /* fields: item->u1.str == name of extension to catch
 item->u2.statements == pval list of statements in context body
 */
 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_SWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 check_pval(item->u1.list, apps,in_globals);
 break;

 case PV_ESWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 check_pval(item->u1.list, apps,in_globals);
 break;

 case PV_INCLUDES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 check_pval(item->u1.list, apps,in_globals);
 check_includes(item);
 for (lp=item->u1.list; lp; lp=lp->next){
 char *incl_context = lp->u1.str;
 struct pval *that_context = find_context(incl_context);

 if ( lp->u2.arglist ) {
 check_timerange(lp->u2.arglist);
 check_dow(lp->u2.arglist->next);
 check_day(lp->u2.arglist->next->next);
 check_month(lp->u2.arglist->next->next->next);
 }

 if (that_context) {
 find_pval_gotos(that_context->u2.statements,0);

 }
 }
 break;

 case PV_STATEMENTBLOCK:
 /* fields: item->u1.list == pval list of statements in block, one per entry in the list
 */
 check_pval(item->u1.list, apps,in_globals);
 break;

 case PV_VARDEC:
 /* fields: item->u1.str == variable name
 item->u2.val == variable value to assign
 */
 /* the RHS of a vardec is encapsulated in a $[] expr. Is it legal? */
 if( !in_globals ) { /* don't check stuff inside the globals context; no wrapping in $[ ] there... */
 snprintf(errmsg,sizeof(errmsg), "file %s, line %d, columns %d-%d, variable declaration expr '%s':", item->filename, item->startline, item->startcol, item->endcol, item->u2.val);
 ast_expr_register_extra_error_info(errmsg);
 ast_expr(item->u2.val, expr_output, sizeof(expr_output),NULL);
 ast_expr_clear_extra_error_info();
 if ( strpbrk(item->u2.val,"~!-+<>=*/&^") && !strstr(item->u2.val,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: expression %s has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u2.val);
 warns++;
 }
 check_expr2_input(item,item->u2.val);
 }
 break;

 case PV_LOCALVARDEC:
 /* fields: item->u1.str == variable name
 item->u2.val == variable value to assign
 */
 /* the RHS of a vardec is encapsulated in a $[] expr. Is it legal? */
 snprintf(errmsg,sizeof(errmsg), "file %s, line %d, columns %d-%d, variable declaration expr '%s':", item->filename, item->startline, item->startcol, item->endcol, item->u2.val);
 ast_expr_register_extra_error_info(errmsg);
 ast_expr(item->u2.val, expr_output, sizeof(expr_output),NULL);
 ast_expr_clear_extra_error_info();
 if ( strpbrk(item->u2.val,"~!-+<>=*/&^") && !strstr(item->u2.val,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: expression %s has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u2.val);
 warns++;
 }
 check_expr2_input(item,item->u2.val);
 break;

 case PV_GOTO:
 /* fields: item->u1.list == pval list of PV_WORD target names, up to 3, in order as given by user.
 item->u1.list->u1.str == where the data on a PV_WORD will always be.
 */
 /* don't check goto's in abstract contexts */
 if ( in_abstract_context )
 break;

 check_goto(item);
 break;

 case PV_LABEL:
 /* fields: item->u1.str == label name
 */
 if ( strspn(item->u1.str, "0123456789") == strlen(item->u1.str) ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: label '%s' is numeric, this is bad practice!\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }

 check_label(item);
 break;

 case PV_FOR:
 /* fields: item->u1.for_init == a string containing the initalizer
 item->u2.for_test == a string containing the loop test
 item->u3.for_inc == a string containing the loop increment

 item->u4.for_statements == a pval list of statements in the for ()
 */
 snprintf(errmsg,sizeof(errmsg),"file %s, line %d, columns %d-%d, for test expr '%s':", item->filename, item->startline, item->startcol, item->endcol, item->u2.for_test);
 ast_expr_register_extra_error_info(errmsg);

 strp = strchr(item->u1.for_init, '=');
 if (strp) {
 ast_expr(strp+1, expr_output, sizeof(expr_output),NULL);
 }
 ast_expr(item->u2.for_test, expr_output, sizeof(expr_output),NULL);
 strp = strchr(item->u3.for_inc, '=');
 if (strp) {
 ast_expr(strp+1, expr_output, sizeof(expr_output),NULL);
 }
 if ( strpbrk(item->u2.for_test,"~!-+<>=*/&^") && !strstr(item->u2.for_test,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: expression %s has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u2.for_test);
 warns++;
 }
 if ( strpbrk(item->u3.for_inc,"~!-+<>=*/&^") && !strstr(item->u3.for_inc,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: expression %s has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u3.for_inc);
 warns++;
 }
 check_expr2_input(item,item->u2.for_test);
 check_expr2_input(item,item->u3.for_inc);

 ast_expr_clear_extra_error_info();
 check_pval(item->u4.for_statements, apps,in_globals);
 break;

 case PV_WHILE:
 /* fields: item->u1.str == the while conditional, as supplied by user

 item->u2.statements == a pval list of statements in the while ()
 */
 snprintf(errmsg,sizeof(errmsg),"file %s, line %d, columns %d-%d, while expr '%s':", item->filename, item->startline, item->startcol, item->endcol, item->u1.str);
 ast_expr_register_extra_error_info(errmsg);
 ast_expr(item->u1.str, expr_output, sizeof(expr_output),NULL);
 ast_expr_clear_extra_error_info();
 if ( strpbrk(item->u1.str,"~!-+<>=*/&^") && !strstr(item->u1.str,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: expression %s has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }
 check_expr2_input(item,item->u1.str);
 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_BREAK:
 /* fields: none
 */
 check_break(item);
 break;

 case PV_RETURN:
 /* fields: none
 */
 break;

 case PV_CONTINUE:
 /* fields: none
 */
 check_continue(item);
 break;

 case PV_RANDOM:
 /* fields: item->u1.str == the random number expression, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 snprintf(errmsg,sizeof(errmsg),"file %s, line %d, columns %d-%d, random expr '%s':", item->filename, item->startline, item->startcol, item->endcol, item->u1.str);
 ast_expr_register_extra_error_info(errmsg);
 ast_expr(item->u1.str, expr_output, sizeof(expr_output),NULL);
 ast_expr_clear_extra_error_info();
 if ( strpbrk(item->u1.str,"~!-+<>=*/&^") && !strstr(item->u1.str,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: random expression '%s' has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }
 check_expr2_input(item,item->u1.str);
 check_pval(item->u2.statements, apps,in_globals);
 if (item->u3.else_statements) {
 check_pval(item->u3.else_statements, apps,in_globals);
 }
 break;

 case PV_IFTIME:
 /* fields: item->u1.list == the if time values, 4 of them, each in PV_WORD, linked list

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 if ( item->u2.arglist ) {
 check_timerange(item->u1.list);
 check_dow(item->u1.list->next);
 check_day(item->u1.list->next->next);
 check_month(item->u1.list->next->next->next);
 }

 check_pval(item->u2.statements, apps,in_globals);
 if (item->u3.else_statements) {
 check_pval(item->u3.else_statements, apps,in_globals);
 }
 break;

 case PV_IF:
 /* fields: item->u1.str == the if conditional, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 snprintf(errmsg,sizeof(errmsg),"file %s, line %d, columns %d-%d, if expr '%s':", item->filename, item->startline, item->startcol, item->endcol, item->u1.str);
 ast_expr_register_extra_error_info(errmsg);
 ast_expr(item->u1.str, expr_output, sizeof(expr_output),NULL);
 ast_expr_clear_extra_error_info();
 if ( strpbrk(item->u1.str,"~!-+<>=*/&^") && !strstr(item->u1.str,"${") ) {
 ast_log(LOG_WARNING,"Warning: file %s, line %d-%d: expression '%s' has operators, but no variables. Interesting...\n",
 item->filename, item->startline, item->endline, item->u1.str);
 warns++;
 }
 check_expr2_input(item,item->u1.str);
 check_pval(item->u2.statements, apps,in_globals);
 if (item->u3.else_statements) {
 check_pval(item->u3.else_statements, apps,in_globals);
 }
 break;

 case PV_SWITCH:
 /* fields: item->u1.str == the switch expression

 item->u2.statements == a pval list of statements in the switch,
 (will be case statements, most likely!)
 */
 /* we can check the switch expression, see if it matches any of the app variables...
 if it does, then, are all the possible cases accounted for? */
 check_switch_expr(item, apps);
 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_EXTENSION:
 /* fields: item->u1.str == the extension name, label, whatever it's called

 item->u2.statements == a pval list of statements in the extension
 item->u3.hints == a char * hint argument
 item->u4.regexten == an int boolean. non-zero says that regexten was specified
 */
 current_extension = item ;

 check_pval(item->u2.statements, apps,in_globals);
 break;

 case PV_IGNOREPAT:
 /* fields: item->u1.str == the ignorepat data
 */
 break;

 case PV_GLOBALS:
 /* fields: item->u1.statements == pval list of statements, usually vardecs
 */
 in_abstract_context = 0;
 check_pval(item->u1.statements, apps, 1);
 break;
 default:
 break;
 }
}

void check_pval(pval *item, struct argapp *apps, int in_globals)
{
 pval *i;

 /* checks to do:
 1. Do goto's point to actual labels?
 2. Do macro calls reference a macro?
 3. Does the number of macro args match the definition?
 4. Is a macro call missing its & at the front?
 5. Application calls-- we could check syntax for existing applications,
 but I need some sort of universal description bnf for a general
 sort of method for checking arguments, in number, maybe even type, at least.
 Don't want to hand code checks for hundreds of applications.
 */

 for (i=item; i; i=i->next) {
 check_pval_item(i,apps,in_globals);
 }
}

void ael2_semantic_check(pval *item, int *arg_errs, int *arg_warns, int *arg_notes)
{

#ifdef AAL_ARGCHECK
 int argapp_errs =0;
 char *rfilename;
#endif
 struct argapp *apps=0;

 if (!item)
 return; /* don't check an empty tree */
#ifdef AAL_ARGCHECK
 rfilename = ast_alloca(10 + strlen(ast_config_AST_VAR_DIR));
 sprintf(rfilename, "%s/applist", ast_config_AST_VAR_DIR);

 apps = argdesc_parse(rfilename, &argapp_errs); /* giveth */
#endif
 current_db = item;
 errs = warns = notes = 0;

 check_context_names();
 check_pval(item, apps, 0);

#ifdef AAL_ARGCHECK
 argdesc_destroy(apps); /* taketh away */
#endif
 current_db = 0;

 *arg_errs = errs;
 *arg_warns = warns;
 *arg_notes = notes;
}

/* =============================================================================================== */
/* "CODE" GENERATOR -- Convert the AEL representation to asterisk extension language */
/* =============================================================================================== */

static int control_statement_count;

struct ael_priority *new_prio(void)
{
 struct ael_priority *x = (struct ael_priority *)calloc(sizeof(struct ael_priority),1);
 return x;
}

struct ael_extension *new_exten(void)
{
 struct ael_extension *x = (struct ael_extension *)calloc(sizeof(struct ael_extension),1);
 return x;
}

void linkprio(struct ael_extension *exten, struct ael_priority *prio, struct ael_extension *mother_exten)
{
 char *p1, *p2;

 if (!exten->plist) {
 exten->plist = prio;
 exten->plist_last = prio;
 } else {
 exten->plist_last->next = prio;
 exten->plist_last = prio;
 }
 if( !prio->exten )
 prio->exten = exten; /* don't override the switch value */
 /* The following code will cause all priorities within an extension
 to have ${EXTEN} or ${EXTEN: replaced with ~~EXTEN~~, which is
 set just before the first switch in an exten. The switches
 will muck up the original ${EXTEN} value, so we save it away
 and the user accesses this copy instead. */
 if (prio->appargs && ((mother_exten && mother_exten->has_switch) || exten->has_switch) ) {
 while ((p1 = strstr(prio->appargs, "${EXTEN}"))) {
 p2 = malloc(strlen(prio->appargs)+5);
 *p1 = 0;
 strcpy(p2, prio->appargs);
 strcat(p2, "${~~EXTEN~~}");
 if (*(p1+8))
 strcat(p2, p1+8);
 free(prio->appargs);
 prio->appargs = p2;
 }
 while ((p1 = strstr(prio->appargs, "${EXTEN:"))) {
 p2 = malloc(strlen(prio->appargs)+5);
 *p1 = 0;
 strcpy(p2, prio->appargs);
 strcat(p2, "${~~EXTEN~~:");
 if (*(p1+8))
 strcat(p2, p1+8);
 free(prio->appargs);
 prio->appargs = p2;
 }
 }
}

void destroy_extensions(struct ael_extension *exten)
{
 struct ael_extension *ne, *nen;
 for (ne=exten; ne; ne=nen) {
 struct ael_priority *pe, *pen;

 if (ne->name)
 free(ne->name);

 /* cidmatch fields are allocated with name, and freed when
 the name field is freed. Don't do a free for this field,
 unless you LIKE to see a crash! */

 if (ne->hints)
 free(ne->hints);

 for (pe=ne->plist; pe; pe=pen) {
 pen = pe->next;
 if (pe->app)
 free(pe->app);
 pe->app = 0;
 if (pe->appargs)
 free(pe->appargs);
 pe->appargs = 0;
 pe->origin = 0;
 pe->goto_true = 0;
 pe->goto_false = 0;
 free(pe);
 }
 nen = ne->next_exten;
 ne->next_exten = 0;
 ne->plist =0;
 ne->plist_last = 0;
 ne->next_exten = 0;
 ne->loop_break = 0;
 ne->loop_continue = 0;
 free(ne);
 }
}

static int label_inside_case(pval *label)
{
 pval *p = label;

 while( p && p->type != PV_MACRO && p->type != PV_CONTEXT ) /* early cutout, sort of */ {
 if( p->type == PV_CASE || p->type == PV_DEFAULT || p->type == PV_PATTERN ) {
 return 1;
 }

 p = p->dad;
 }
 return 0;
}

static void linkexten(struct ael_extension *exten, struct ael_extension *add)
{
 add->next_exten = exten->next_exten; /* this will reverse the order. Big deal. */
 exten->next_exten = add;
}

static void remove_spaces_before_equals(char *str)
{
 char *p;
 while( str && *str && *str != '=' )
 {
 if( *str == ' ' || *str == '\n' || *str == '\r' || *str == '\t' )
 {
 p = str;
 while( *p )
 {
 *p = *(p+1);
 p++;
 }
 }
 else
 str++;
 }
}

/* =============================================================================================== */
/* "CODE" GENERATOR -- Convert the AEL representation to asterisk extension language */
/* =============================================================================================== */

static void gen_match_to_pattern(char *pattern, char *result)
{
 /* the result will be a string that will be matched by pattern */
 char *p=pattern, *t=result;
 while (*p) {
 if (*p == 'x' || *p == 'n' || *p == 'z' || *p == 'X' || *p == 'N' || *p == 'Z')
 *t++ = '9';
 else if (*p == '[') {
 char *z = p+1;
 while (*z != ']')
 z++;
 if (*(z+1)== ']')
 z++;
 *t++=*(p+1); /* use the first char in the set */
 p = z;
 } else {
 *t++ = *p;
 }
 p++;
 }
 *t++ = 0; /* cap it off */
}

/* ==== a set of routines to search for a switch statement contained in the pval description */

int find_switch_item(pval *item);
int contains_switch(pval *item);


int find_switch_item(pval *item)
{
 switch ( item->type ) {
 case PV_LOCALVARDEC:
 /* fields: item->u1.str == string associated with this (word). */
 break;

 case PV_WORD:
 /* fields: item->u1.str == string associated with this (word). */
 break;

 case PV_MACRO:
 /* fields: item->u1.str == name of macro
 item->u2.arglist == pval list of PV_WORD arguments of macro, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg

 item->u3.macro_statements == pval list of statements in macro body.
 */
 /* had better not see this */
 if (contains_switch(item->u3.macro_statements))
 return 1;
 break;

 case PV_CONTEXT:
 /* fields: item->u1.str == name of context
 item->u2.statements == pval list of statements in context body
 item->u3.abstract == int 1 if an abstract keyword were present
 */
 /* had better not see this */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_MACRO_CALL:
 /* fields: item->u1.str == name of macro to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 break;

 case PV_APPLICATION_CALL:
 /* fields: item->u1.str == name of application to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 break;

 case PV_CASE:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* had better not see this */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_PATTERN:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 /* had better not see this */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_DEFAULT:
 /* fields:
 item->u2.statements == pval list of statements under the case
 */
 /* had better not see this */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_CATCH:
 /* fields: item->u1.str == name of extension to catch
 item->u2.statements == pval list of statements in context body
 */
 /* had better not see this */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_SWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 break;

 case PV_ESWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 break;

 case PV_INCLUDES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 item->u2.arglist == pval list of 4 PV_WORD elements for time values
 */
 break;

 case PV_STATEMENTBLOCK:
 /* fields: item->u1.list == pval list of statements in block, one per entry in the list
 */
 if (contains_switch(item->u1.list) )
 return 1;
 break;

 case PV_VARDEC:
 /* fields: item->u1.str == variable name
 item->u2.val == variable value to assign
 */
 break;

 case PV_GOTO:
 /* fields: item->u1.list == pval list of PV_WORD target names, up to 3, in order as given by user.
 item->u1.list->u1.str == where the data on a PV_WORD will always be.
 */
 break;

 case PV_LABEL:
 /* fields: item->u1.str == label name
 */
 break;

 case PV_FOR:
 /* fields: item->u1.for_init == a string containing the initalizer
 item->u2.for_test == a string containing the loop test
 item->u3.for_inc == a string containing the loop increment

 item->u4.for_statements == a pval list of statements in the for ()
 */
 if (contains_switch(item->u4.for_statements))
 return 1;
 break;

 case PV_WHILE:
 /* fields: item->u1.str == the while conditional, as supplied by user

 item->u2.statements == a pval list of statements in the while ()
 */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_BREAK:
 /* fields: none
 */
 break;

 case PV_RETURN:
 /* fields: none
 */
 break;

 case PV_CONTINUE:
 /* fields: none
 */
 break;

 case PV_IFTIME:
 /* fields: item->u1.list == there are 4 linked PV_WORDs here.

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 if (contains_switch(item->u2.statements))
 return 1;
 if ( item->u3.else_statements ) {
 if (contains_switch(item->u3.else_statements))
 return 1;
 }
 break;

 case PV_RANDOM:
 /* fields: item->u1.str == the random number expression, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 if (contains_switch(item->u2.statements))
 return 1;
 if ( item->u3.else_statements ) {
 if (contains_switch(item->u3.else_statements))
 return 1;
 }
 break;

 case PV_IF:
 /* fields: item->u1.str == the if conditional, as supplied by user

 item->u2.statements == a pval list of statements in the if ()
 item->u3.else_statements == a pval list of statements in the else
 (could be zero)
 */
 if (contains_switch(item->u2.statements))
 return 1;
 if ( item->u3.else_statements ) {
 if (contains_switch(item->u3.else_statements))
 return 1;
 }
 break;

 case PV_SWITCH:
 /* fields: item->u1.str == the switch expression

 item->u2.statements == a pval list of statements in the switch,
 (will be case statements, most likely!)
 */
 return 1; /* JACKPOT */
 break;

 case PV_EXTENSION:
 /* fields: item->u1.str == the extension name, label, whatever it's called

 item->u2.statements == a pval list of statements in the extension
 item->u3.hints == a char * hint argument
 item->u4.regexten == an int boolean. non-zero says that regexten was specified
 */
 if (contains_switch(item->u2.statements))
 return 1;
 break;

 case PV_IGNOREPAT:
 /* fields: item->u1.str == the ignorepat data
 */
 break;

 case PV_GLOBALS:
 /* fields: item->u1.statements == pval list of statements, usually vardecs
 */
 break;
 }
 return 0;
}

int contains_switch(pval *item)
{
 pval *i;

 for (i=item; i; i=i->next) {
 if (find_switch_item(i))
 return 1;
 }
 return 0;
}


static int gen_prios(struct ael_extension *exten, char *label, pval *statement, struct ael_extension *mother_exten, struct ast_context *this_context )
{
 pval *p,*p2,*p3;
 struct ael_priority *pr;
 struct ael_priority *for_init, *for_test, *for_inc, *for_loop, *for_end;
 struct ael_priority *while_test, *while_loop, *while_end;
 struct ael_priority *switch_set, *switch_test, *switch_end, *fall_thru, *switch_empty;
 struct ael_priority *if_test, *if_end, *if_skip, *if_false;
#ifdef OLD_RAND_ACTION
 struct ael_priority *rand_test, *rand_end, *rand_skip;
#endif
 RAII_VAR(char *, buf1, NULL, free);
 RAII_VAR(char *, buf2, NULL, free);
 RAII_VAR(char *, new_label, NULL, free);
 char *strp, *strp2;
 int default_exists;
 int local_control_statement_count;
 int first;
 struct ael_priority *loop_break_save;
 struct ael_priority *loop_continue_save;
 struct ael_extension *switch_case,*switch_null;

 if (!(buf1 = malloc(BUF_SIZE))) {
 return -1;
 }
 if (!(buf2 = malloc(BUF_SIZE))) {
 return -1;
 }
 if (!(new_label = malloc(BUF_SIZE))) {
 return -1;
 }

 if ((mother_exten && !mother_exten->checked_switch) || (exten && !exten->checked_switch)) {
 if (contains_switch(statement)) { /* only run contains_switch if you haven't checked before */
 if (mother_exten) {
 if (!mother_exten->has_switch) {
 for (first = 1; first >= 0; first--) {
 switch_set = new_prio();
 switch_set->type = AEL_APPCALL;
 switch_set->app = strdup("MSet");
 /* Are we likely inside a gosub subroutine? */
 if (!strcmp(mother_exten->name, "~~s~~") && first) {
 /* If we're not actually within a gosub, this will fail, but the
 * second time through, it will get set. If we are within gosub,
 * the second time through is redundant, but acceptable. */
 switch_set->appargs = strdup("LOCAL(~~EXTEN~~)=${EXTEN}");
 } else {
 switch_set->appargs = strdup("~~EXTEN~~=${EXTEN}");
 first = 0;
 }
 linkprio(exten, switch_set, mother_exten);
 mother_exten->has_switch = 1;
 mother_exten->checked_switch = 1;
 if (exten) {
 exten->has_switch = 1;
 exten->checked_switch = 1;
 }
 }
 }
 } else if (exten) {
 if (!exten->has_switch) {
 for (first = 1; first >= 0; first--) {
 switch_set = new_prio();
 switch_set->type = AEL_APPCALL;
 switch_set->app = strdup("MSet");
 /* Are we likely inside a gosub subroutine? */
 if (!strcmp(exten->name, "~~s~~")) {
 /* If we're not actually within a gosub, this will fail, but the
 * second time through, it will get set. If we are within gosub,
 * the second time through is redundant, but acceptable. */
 switch_set->appargs = strdup("LOCAL(~~EXTEN~~)=${EXTEN}");
 } else {
 switch_set->appargs = strdup("~~EXTEN~~=${EXTEN}");
 first = 0;
 }
 linkprio(exten, switch_set, mother_exten);
 exten->has_switch = 1;
 exten->checked_switch = 1;
 if (mother_exten) {
 mother_exten->has_switch = 1;
 mother_exten->checked_switch = 1;
 }
 }
 }
 }
 } else {
 if (mother_exten) {
 mother_exten->checked_switch = 1;
 }
 if (exten) {
 exten->checked_switch = 1;
 }
 }
 }
 for (p=statement; p; p=p->next) {
 switch (p->type) {
 case PV_VARDEC:
 pr = new_prio();
 pr->type = AEL_APPCALL;
 snprintf(buf1, BUF_SIZE, "%s=$[%s]", p->u1.str, p->u2.val);
 pr->app = strdup("MSet");
 remove_spaces_before_equals(buf1);
 pr->appargs = strdup(buf1);
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_LOCALVARDEC:
 pr = new_prio();
 pr->type = AEL_APPCALL;
 snprintf(buf1, BUF_SIZE, "LOCAL(%s)=$[%s]", p->u1.str, p->u2.val);
 pr->app = strdup("MSet");
 remove_spaces_before_equals(buf1);
 pr->appargs = strdup(buf1);
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_GOTO:
 pr = new_prio();
 pr->type = AEL_APPCALL;
 p->u2.goto_target = get_goto_target(p);
 if( p->u2.goto_target ) {
 p->u3.goto_target_in_case = label_inside_case(p->u2.goto_target);
 }

 if (!p->u1.list->next) /* just one */ {
 pr->app = strdup("Goto");
 if (!mother_exten)
 pr->appargs = strdup(p->u1.list->u1.str);
 else { /* for the case of simple within-extension gotos in case/pattern/default statement blocks: */
 snprintf(buf1, BUF_SIZE, "%s,%s", mother_exten->name, p->u1.list->u1.str);
 pr->appargs = strdup(buf1);
 }

 } else if (p->u1.list->next && !p->u1.list->next->next) /* two */ {
 snprintf(buf1, BUF_SIZE, "%s,%s", p->u1.list->u1.str, p->u1.list->next->u1.str);
 pr->app = strdup("Goto");
 pr->appargs = strdup(buf1);
 } else if (p->u1.list->next && p->u1.list->next->next) {
 snprintf(buf1, BUF_SIZE, "%s,%s,%s", p->u1.list->u1.str,
 p->u1.list->next->u1.str,
 p->u1.list->next->next->u1.str);
 pr->app = strdup("Goto");
 pr->appargs = strdup(buf1);
 }
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_LABEL:
 pr = new_prio();
 pr->type = AEL_LABEL;
 pr->origin = p;
 p->u3.compiled_label = exten;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_FOR:
 control_statement_count++;
 loop_break_save = exten->loop_break; /* save them, then restore before leaving */
 loop_continue_save = exten->loop_continue;
 snprintf(new_label, BUF_SIZE, "for_%s_%d", label, control_statement_count);
 for_init = new_prio();
 for_inc = new_prio();
 for_test = new_prio();
 for_loop = new_prio();
 for_end = new_prio();
 for_init->type = AEL_APPCALL;
 for_inc->type = AEL_APPCALL;
 for_test->type = AEL_FOR_CONTROL;
 for_test->goto_false = for_end;
 for_loop->type = AEL_CONTROL1; /* simple goto */
 for_end->type = AEL_APPCALL;
 for_init->app = strdup("MSet");

 strcpy(buf2,p->u1.for_init);
 remove_spaces_before_equals(buf2);
 strp = strchr(buf2, '=');
 if (strp) {
 strp2 = strchr(p->u1.for_init, '=');
 *(strp+1) = 0;
 strcat(buf2,"$[");
 strncat(buf2,strp2+1, BUF_SIZE-strlen(strp2+1)-2);
 strcat(buf2,"]");
 for_init->appargs = strdup(buf2);
 } else {
 strp2 = p->u1.for_init;
 while (*strp2 && isspace(*strp2))
 strp2++;
 if (*strp2 == '&') { /* itsa macro call */
 char *strp3 = strp2+1;
 while (*strp3 && isspace(*strp3))
 strp3++;
 strcpy(buf2, strp3);
 strp3 = strchr(buf2,'(');
 if (strp3) {
 *strp3 = ',';
 }
 strp3 = strrchr(buf2, ')');
 if (strp3)
 *strp3 = 0; /* remove the closing paren */
 for_init->appargs = strdup(buf2);
 free(for_init->app);
 for_init->app = strdup("Gosub");
 } else { /* must be a regular app call */
 char *strp3;
 strcpy(buf2, strp2);
 strp3 = strchr(buf2,'(');
 if (strp3) {
 *strp3 = 0;
 free(for_init->app);
 for_init->app = strdup(buf2);
 for_init->appargs = strdup(strp3+1);
 strp3 = strrchr(for_init->appargs, ')');
 if (strp3)
 *strp3 = 0; /* remove the closing paren */
 }
 }
 }

 strcpy(buf2,p->u3.for_inc);
 remove_spaces_before_equals(buf2);
 strp = strchr(buf2, '=');
 if (strp) { /* there's an = in this part; that means an assignment. set it up */
 strp2 = strchr(p->u3.for_inc, '=');
 *(strp+1) = 0;
 strcat(buf2,"$[");
 strncat(buf2,strp2+1, BUF_SIZE-strlen(strp2+1)-2);
 strcat(buf2,"]");
 for_inc->appargs = strdup(buf2);
 for_inc->app = strdup("MSet");
 } else {
 strp2 = p->u3.for_inc;
 while (*strp2 && isspace(*strp2))
 strp2++;
 if (*strp2 == '&') { /* itsa macro call */
 char *strp3 = strp2+1;
 while (*strp3 && isspace(*strp3))
 strp3++;
 strcpy(buf2, strp3);
 strp3 = strchr(buf2,'(');
 if (strp3) {
 *strp3 = ',';
 }
 strp3 = strrchr(buf2, ')');
 if (strp3)
 *strp3 = 0; /* remove the closing paren */

 for_inc->appargs = strdup(buf2);

 for_inc->app = strdup("Gosub");
 } else { /* must be a regular app call */
 char *strp3;
 strcpy(buf2, strp2);
 strp3 = strchr(buf2,'(');
 if (strp3) {
 *strp3 = 0;
 for_inc->app = strdup(buf2);
 for_inc->appargs = strdup(strp3+1);
 strp3 = strrchr(for_inc->appargs, ')');
 if (strp3)
 *strp3 = 0; /* remove the closing paren */
 }
 }
 }
 snprintf(buf1, BUF_SIZE, "$[%s]",p->u2.for_test);
 for_test->app = 0;
 for_test->appargs = strdup(buf1);
 for_loop->goto_true = for_test;
 snprintf(buf1, BUF_SIZE, "Finish for_%s_%d", label, control_statement_count);
 for_end->app = strdup("NoOp");
 for_end->appargs = strdup(buf1);
 /* link & load! */
 linkprio(exten, for_init, mother_exten);
 linkprio(exten, for_test, mother_exten);

 /* now, put the body of the for loop here */
 exten->loop_break = for_end;
 exten->loop_continue = for_inc;

 if (gen_prios(exten, new_label, p->u4.for_statements, mother_exten, this_context)) { /* this will link in all the statements here */
 return -1;
 }

 linkprio(exten, for_inc, mother_exten);
 linkprio(exten, for_loop, mother_exten);
 linkprio(exten, for_end, mother_exten);


 exten->loop_break = loop_break_save;
 exten->loop_continue = loop_continue_save;
 for_loop->origin = p;
 break;

 case PV_WHILE:
 control_statement_count++;
 loop_break_save = exten->loop_break; /* save them, then restore before leaving */
 loop_continue_save = exten->loop_continue;
 snprintf(new_label, BUF_SIZE, "while_%s_%d", label, control_statement_count);
 while_test = new_prio();
 while_loop = new_prio();
 while_end = new_prio();
 while_test->type = AEL_FOR_CONTROL;
 while_test->goto_false = while_end;
 while_loop->type = AEL_CONTROL1; /* simple goto */
 while_end->type = AEL_APPCALL;
 snprintf(buf1, BUF_SIZE, "$[%s]",p->u1.str);
 while_test->app = 0;
 while_test->appargs = strdup(buf1);
 while_loop->goto_true = while_test;
 snprintf(buf1, BUF_SIZE, "Finish while_%s_%d", label, control_statement_count);
 while_end->app = strdup("NoOp");
 while_end->appargs = strdup(buf1);

 linkprio(exten, while_test, mother_exten);

 /* now, put the body of the for loop here */
 exten->loop_break = while_end;
 exten->loop_continue = while_test;

 if (gen_prios(exten, new_label, p->u2.statements, mother_exten, this_context)) { /* this will link in all the while body statements here */
 return -1;
 }

 linkprio(exten, while_loop, mother_exten);
 linkprio(exten, while_end, mother_exten);


 exten->loop_break = loop_break_save;
 exten->loop_continue = loop_continue_save;
 while_loop->origin = p;
 break;

 case PV_SWITCH:
 control_statement_count++;
 local_control_statement_count = control_statement_count;
 loop_break_save = exten->loop_break; /* save them, then restore before leaving */
 loop_continue_save = exten->loop_continue;
 snprintf(new_label, BUF_SIZE, "sw_%s_%d", label, control_statement_count);
 switch_test = new_prio();
 switch_end = new_prio();
 switch_test->type = AEL_APPCALL;
 switch_end->type = AEL_APPCALL;
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", control_statement_count, p->u1.str);
 switch_test->app = strdup("Goto");
 switch_test->appargs = strdup(buf1);
 snprintf(buf1, BUF_SIZE, "Finish switch_%s_%d", label, control_statement_count);
 switch_end->app = strdup("NoOp");
 switch_end->appargs = strdup(buf1);
 switch_end->origin = p;
 switch_end->exten = exten;

 linkprio(exten, switch_test, mother_exten);
 linkprio(exten, switch_end, mother_exten);

 exten->loop_break = switch_end;
 exten->loop_continue = 0;
 default_exists = 0;

 for (p2=p->u2.statements; p2; p2=p2->next) {
 /* now, for each case/default put the body of the for loop here */
 if (p2->type == PV_CASE) {
 /* ok, generate a extension and link it in */
 switch_case = new_exten();
 if (mother_exten && mother_exten->checked_switch) {
 switch_case->has_switch = mother_exten->has_switch;
 switch_case->checked_switch = mother_exten->checked_switch;
 }
 if (exten && exten->checked_switch) {
 switch_case->has_switch = exten->has_switch;
 switch_case->checked_switch = exten->checked_switch;
 }
 switch_case->context = this_context;
 switch_case->is_switch = 1;
 /* the break/continue locations are inherited from parent */
 switch_case->loop_break = exten->loop_break;
 switch_case->loop_continue = exten->loop_continue;

 linkexten(exten,switch_case);
 snprintf(buf1, BUF_SIZE, "sw_%d_%s", local_control_statement_count, p2->u1.str);
 switch_case->name = strdup(buf1);
 snprintf(new_label, BUF_SIZE, "sw_%s_%s_%d", label, p2->u1.str, local_control_statement_count);

 if (gen_prios(switch_case, new_label, p2->u2.statements, exten, this_context)) { /* this will link in all the case body statements here */
 return -1;
 }

 /* here is where we write code to "fall thru" to the next case... if there is one... */
 for (p3=p2->u2.statements; p3; p3=p3->next) {
 if (!p3->next)
 break;
 }
 /* p3 now points the last statement... */
 if (!p3 || ( p3->type != PV_GOTO && p3->type != PV_BREAK && p3->type != PV_RETURN) ) {
 /* is there a following CASE/PATTERN/DEFAULT? */
 if (p2->next && p2->next->type == PV_CASE) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", local_control_statement_count, p2->next->u1.str);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (p2->next && p2->next->type == PV_PATTERN) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 gen_match_to_pattern(p2->next->u1.str, buf2);
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", local_control_statement_count, buf2);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (p2->next && p2->next->type == PV_DEFAULT) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 snprintf(buf1, BUF_SIZE, "sw_%d_.,10", local_control_statement_count);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (!p2->next) {
 fall_thru = new_prio();
 fall_thru->type = AEL_CONTROL1;
 fall_thru->goto_true = switch_end;
 fall_thru->app = strdup("Goto");
 linkprio(switch_case, fall_thru, mother_exten);
 }
 }
 if (switch_case->return_needed) { /* returns don't generate a goto eoe (end of extension) any more, just a Return() app call) */
 char buf[2000];
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf, BUF_SIZE, "End of Extension %s", switch_case->name);
 np2->appargs = strdup(buf);
 linkprio(switch_case, np2, mother_exten);
 switch_case-> return_target = np2;
 }
 } else if (p2->type == PV_PATTERN) {
 /* ok, generate a extension and link it in */
 switch_case = new_exten();
 if (mother_exten && mother_exten->checked_switch) {
 switch_case->has_switch = mother_exten->has_switch;
 switch_case->checked_switch = mother_exten->checked_switch;
 }
 if (exten && exten->checked_switch) {
 switch_case->has_switch = exten->has_switch;
 switch_case->checked_switch = exten->checked_switch;
 }
 switch_case->context = this_context;
 switch_case->is_switch = 1;
 /* the break/continue locations are inherited from parent */
 switch_case->loop_break = exten->loop_break;
 switch_case->loop_continue = exten->loop_continue;

 linkexten(exten,switch_case);
 snprintf(buf1, BUF_SIZE, "_sw_%d_%s", local_control_statement_count, p2->u1.str);
 switch_case->name = strdup(buf1);
 snprintf(new_label, BUF_SIZE, "sw_%s_%s_%d", label, p2->u1.str, local_control_statement_count);

 if (gen_prios(switch_case, new_label, p2->u2.statements, exten, this_context)) { /* this will link in all the while body statements here */
 return -1;
 }
 /* here is where we write code to "fall thru" to the next case... if there is one... */
 for (p3=p2->u2.statements; p3; p3=p3->next) {
 if (!p3->next)
 break;
 }
 /* p3 now points the last statement... */
 if (!p3 || ( p3->type != PV_GOTO && p3->type != PV_BREAK && p3->type != PV_RETURN)) {
 /* is there a following CASE/PATTERN/DEFAULT? */
 if (p2->next && p2->next->type == PV_CASE) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", local_control_statement_count, p2->next->u1.str);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (p2->next && p2->next->type == PV_PATTERN) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 gen_match_to_pattern(p2->next->u1.str, buf2);
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", local_control_statement_count, buf2);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (p2->next && p2->next->type == PV_DEFAULT) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 snprintf(buf1, BUF_SIZE, "sw_%d_.,10", local_control_statement_count);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (!p2->next) {
 fall_thru = new_prio();
 fall_thru->type = AEL_CONTROL1;
 fall_thru->goto_true = switch_end;
 fall_thru->app = strdup("Goto");
 linkprio(switch_case, fall_thru, mother_exten);
 }
 }
 if (switch_case->return_needed) { /* returns don't generate a goto eoe (end of extension) any more, just a Return() app call) */
 char buf[2000];
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf,sizeof(buf),"End of Extension %s", switch_case->name);
 np2->appargs = strdup(buf);
 linkprio(switch_case, np2, mother_exten);
 switch_case-> return_target = np2;
 }
 } else if (p2->type == PV_DEFAULT) {
 /* ok, generate a extension and link it in */
 switch_case = new_exten();
 if (mother_exten && mother_exten->checked_switch) {
 switch_case->has_switch = mother_exten->has_switch;
 switch_case->checked_switch = mother_exten->checked_switch;
 }
 if (exten && exten->checked_switch) {
 switch_case->has_switch = exten->has_switch;
 switch_case->checked_switch = exten->checked_switch;
 }
 switch_case->context = this_context;
 switch_case->is_switch = 1;

 /* new: the default case intros a pattern with ., which covers ALMOST everything.
 but it doesn't cover a NULL pattern. So, we'll define a null extension to match
 that goto's the default extension. */

 default_exists++;
 switch_null = new_exten();
 if (mother_exten && mother_exten->checked_switch) {
 switch_null->has_switch = mother_exten->has_switch;
 switch_null->checked_switch = mother_exten->checked_switch;
 }
 if (exten && exten->checked_switch) {
 switch_null->has_switch = exten->has_switch;
 switch_null->checked_switch = exten->checked_switch;
 }
 switch_null->context = this_context;
 switch_null->is_switch = 1;
 switch_empty = new_prio();
 snprintf(buf1, BUF_SIZE, "sw_%d_.,10", local_control_statement_count);
 switch_empty->app = strdup("Goto");
 switch_empty->appargs = strdup(buf1);
 linkprio(switch_null, switch_empty, mother_exten);
 snprintf(buf1, BUF_SIZE, "sw_%d_", local_control_statement_count);
 switch_null->name = strdup(buf1);
 switch_null->loop_break = exten->loop_break;
 switch_null->loop_continue = exten->loop_continue;
 linkexten(exten,switch_null);

 /* the break/continue locations are inherited from parent */
 switch_case->loop_break = exten->loop_break;
 switch_case->loop_continue = exten->loop_continue;
 linkexten(exten,switch_case);
 snprintf(buf1, BUF_SIZE, "_sw_%d_.", local_control_statement_count);
 switch_case->name = strdup(buf1);

 snprintf(new_label, BUF_SIZE, "sw_%s_default_%d", label, local_control_statement_count);

 if (gen_prios(switch_case, new_label, p2->u2.statements, exten, this_context)) { /* this will link in all the default: body statements here */
 return -1;
 }

 /* here is where we write code to "fall thru" to the next case... if there is one... */
 for (p3=p2->u2.statements; p3; p3=p3->next) {
 if (!p3->next)
 break;
 }
 /* p3 now points the last statement... */
 if (!p3 || (p3->type != PV_GOTO && p3->type != PV_BREAK && p3->type != PV_RETURN)) {
 /* is there a following CASE/PATTERN/DEFAULT? */
 if (p2->next && p2->next->type == PV_CASE) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", local_control_statement_count, p2->next->u1.str);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (p2->next && p2->next->type == PV_PATTERN) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 gen_match_to_pattern(p2->next->u1.str, buf2);
 snprintf(buf1, BUF_SIZE, "sw_%d_%s,10", local_control_statement_count, buf2);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (p2->next && p2->next->type == PV_DEFAULT) {
 fall_thru = new_prio();
 fall_thru->type = AEL_APPCALL;
 fall_thru->app = strdup("Goto");
 snprintf(buf1, BUF_SIZE, "sw_%d_.,10", local_control_statement_count);
 fall_thru->appargs = strdup(buf1);
 linkprio(switch_case, fall_thru, mother_exten);
 } else if (!p2->next) {
 fall_thru = new_prio();
 fall_thru->type = AEL_CONTROL1;
 fall_thru->goto_true = switch_end;
 fall_thru->app = strdup("Goto");
 linkprio(switch_case, fall_thru, mother_exten);
 }
 }
 if (switch_case->return_needed) { /* returns don't generate a goto eoe (end of extension) any more, just a Return() app call) */
 char buf[2000];
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf,sizeof(buf),"End of Extension %s", switch_case->name);
 np2->appargs = strdup(buf);
 linkprio(switch_case, np2, mother_exten);
 switch_case-> return_target = np2;
 }
 } else {
 /* what could it be??? */
 }
 }

 exten->loop_break = loop_break_save;
 exten->loop_continue = loop_continue_save;
 switch_test->origin = p;
 switch_end->origin = p;
 break;

 case PV_MACRO_CALL:
 pr = new_prio();
 pr->type = AEL_APPCALL;
 snprintf(buf1, BUF_SIZE, "%s,~~s~~,1", p->u1.str);
 first = 1;
 for (p2 = p->u2.arglist; p2; p2 = p2->next) {
 if (first)
 {
 strcat(buf1,"(");
 first = 0;
 }
 else
 strcat(buf1,",");
 strcat(buf1,p2->u1.str);
 }
 if (!first)
 strcat(buf1,")");

 pr->app = strdup("Gosub");
 pr->appargs = strdup(buf1);
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_APPLICATION_CALL:
 pr = new_prio();
 pr->type = AEL_APPCALL;
 buf1[0] = 0;
 for (p2 = p->u2.arglist; p2; p2 = p2->next) {
 if (p2 != p->u2.arglist )
 strcat(buf1,",");
 strcat(buf1,p2->u1.str);
 }
 pr->app = strdup(p->u1.str);
 pr->appargs = strdup(buf1);
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_BREAK:
 pr = new_prio();
 pr->type = AEL_CONTROL1; /* simple goto */
 pr->goto_true = exten->loop_break;
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_RETURN: /* hmmmm */
 pr = new_prio();
 pr->type = AEL_RETURN; /* simple Return */
 /* exten->return_needed++; */
 pr->app = strdup("Return");
 pr->appargs = strdup("");
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_CONTINUE:
 pr = new_prio();
 pr->type = AEL_CONTROL1; /* simple goto */
 pr->goto_true = exten->loop_continue;
 pr->origin = p;
 linkprio(exten, pr, mother_exten);
 break;

 case PV_IFTIME:
 control_statement_count++;
 snprintf(new_label, BUF_SIZE, "iftime_%s_%d", label, control_statement_count);

 if_test = new_prio();
 if_test->type = AEL_IFTIME_CONTROL;
 snprintf(buf1, BUF_SIZE, "%s,%s,%s,%s",
 p->u1.list->u1.str,
 p->u1.list->next->u1.str,
 p->u1.list->next->next->u1.str,
 p->u1.list->next->next->next->u1.str);
 if_test->app = 0;
 if_test->appargs = strdup(buf1);
 if_test->origin = p;

 if_end = new_prio();
 if_end->type = AEL_APPCALL;
 snprintf(buf1, BUF_SIZE, "Finish iftime_%s_%d", label, control_statement_count);
 if_end->app = strdup("NoOp");
 if_end->appargs = strdup(buf1);

 if (p->u3.else_statements) {
 if_skip = new_prio();
 if_skip->type = AEL_CONTROL1; /* simple goto */
 if_skip->goto_true = if_end;
 if_skip->origin = p;

 } else {
 if_skip = 0;

 if_test->goto_false = if_end;
 }

 if_false = new_prio();
 if_false->type = AEL_CONTROL1;
 if (p->u3.else_statements) {
 if_false->goto_true = if_skip; /* +1 */
 } else {
 if_false->goto_true = if_end;
 }

 /* link & load! */
 linkprio(exten, if_test, mother_exten);
 linkprio(exten, if_false, mother_exten);

 /* now, put the body of the if here */

 if (gen_prios(exten, new_label, p->u2.statements, mother_exten, this_context)) { /* this will link in all the statements here */
 return -1;
 }

 if (p->u3.else_statements) {
 linkprio(exten, if_skip, mother_exten);
 if (gen_prios(exten, new_label, p->u3.else_statements, mother_exten, this_context)) { /* this will link in all the statements here */
 return -1;
 }
 }

 linkprio(exten, if_end, mother_exten);

 break;

 case PV_RANDOM:
 case PV_IF:
 control_statement_count++;
 snprintf(new_label, BUF_SIZE, "if_%s_%d", label, control_statement_count);

 if_test = new_prio();
 if_end = new_prio();
 if_test->type = AEL_IF_CONTROL;
 if_end->type = AEL_APPCALL;
 if ( p->type == PV_RANDOM )
 snprintf(buf1, BUF_SIZE, "$[${RAND(0,99)} < (%s)]", p->u1.str);
 else
 snprintf(buf1, BUF_SIZE, "$[%s]", p->u1.str);
 if_test->app = 0;
 if_test->appargs = strdup(buf1);
 snprintf(buf1, BUF_SIZE, "Finish if_%s_%d", label, control_statement_count);
 if_end->app = strdup("NoOp");
 if_end->appargs = strdup(buf1);
 if_test->origin = p;

 if (p->u3.else_statements) {
 if_skip = new_prio();
 if_skip->type = AEL_CONTROL1; /* simple goto */
 if_skip->goto_true = if_end;
 if_test->goto_false = if_skip;;
 } else {
 if_skip = 0;
 if_test->goto_false = if_end;;
 }

 /* link & load! */
 linkprio(exten, if_test, mother_exten);

 /* now, put the body of the if here */

 if (gen_prios(exten, new_label, p->u2.statements, mother_exten, this_context)) { /* this will link in all the statements here */
 return -1;
 }

 if (p->u3.else_statements) {
 linkprio(exten, if_skip, mother_exten);
 if (gen_prios(exten, new_label, p->u3.else_statements, mother_exten, this_context)) { /* this will link in all the statements here */
 return -1;
 }
 }

 linkprio(exten, if_end, mother_exten);

 break;

 case PV_STATEMENTBLOCK:
 if (gen_prios(exten, label, p->u1.list, mother_exten, this_context)) { /* recurse into the block */
 return -1;
 }
 break;

 case PV_CATCH:
 control_statement_count++;
 /* generate an extension with name of catch, put all catch stats
 into this exten! */
 switch_case = new_exten();
 if (mother_exten && mother_exten->checked_switch) {
 switch_case->has_switch = mother_exten->has_switch;
 switch_case->checked_switch = mother_exten->checked_switch;
 }
 if (exten && exten->checked_switch) {
 switch_case->has_switch = exten->has_switch;
 switch_case->checked_switch = exten->checked_switch;
 }

 switch_case->context = this_context;
 linkexten(exten,switch_case);
 switch_case->name = strdup(p->u1.str);
 snprintf(new_label, BUF_SIZE, "catch_%s_%d",p->u1.str, control_statement_count);

 if (gen_prios(switch_case, new_label, p->u2.statements, mother_exten,this_context)) { /* this will link in all the catch body statements here */
 return -1;
 }
 if (switch_case->return_needed) { /* returns now generate a Return() app call, no longer a goto to the end of the exten */
 char buf[2000];
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf,sizeof(buf),"End of Extension %s", switch_case->name);
 np2->appargs = strdup(buf);
 linkprio(switch_case, np2, mother_exten);
 switch_case-> return_target = np2;
 }

 break;
 default:
 break;
 }
 }
 return 0;
}

void set_priorities(struct ael_extension *exten)
{
 int i;
 struct ael_priority *pr;
 do {
 if (exten->is_switch)
 i = 10;
 else if (exten->regexten)
 i=2;
 else
 i=1;

 for (pr=exten->plist; pr; pr=pr->next) {
 pr->priority_num = i;

 if (!pr->origin || (pr->origin && pr->origin->type != PV_LABEL) ) /* Labels don't show up in the dialplan,
 but we want them to point to the right
 priority, which would be the next line
 after the label; */
 i++;
 }

 exten = exten->next_exten;
 } while ( exten );
}

void add_extensions(struct ael_extension *exten)
{
 struct ael_priority *pr;
 char *label=0;
 char realext[AST_MAX_EXTENSION];
 if (!exten) {
 ast_log(LOG_WARNING, "This file is Empty!\n" );
 return;
 }
 do {
 struct ael_priority *last = 0;

 pbx_substitute_variables_helper(NULL, exten->name, realext, sizeof(realext) - 1);
 if (exten->hints) {
 if (ast_add_extension2(exten->context, 0 /*no replace*/, realext, PRIORITY_HINT, NULL, exten->cidmatch,
 exten->hints, NULL, ast_free_ptr, registrar, NULL, 0)) {
 ast_log(LOG_WARNING, "Unable to add step at priority 'hint' of extension '%s'\n",
 exten->name);
 }
 }

 for (pr=exten->plist; pr; pr=pr->next) {
 char app[2000];
 char appargs[2000];

 /* before we can add the extension, we need to prep the app/appargs;
 the CONTROL types need to be done after the priority numbers are calculated.
 */
 if (pr->type == AEL_LABEL) /* don't try to put labels in the dialplan! */ {
 last = pr;
 continue;
 }

 if (pr->app)
 strcpy(app, pr->app);
 else
 app[0] = 0;
 if (pr->appargs )
 strcpy(appargs, pr->appargs);
 else
 appargs[0] = 0;
 switch( pr->type ) {
 case AEL_APPCALL:
 /* easy case. Everything is all set up */
 break;

 case AEL_CONTROL1: /* FOR loop, WHILE loop, BREAK, CONTINUE, IF, IFTIME */
 /* simple, unconditional goto. */
 strcpy(app,"Goto");
 if (pr->goto_true->origin && pr->goto_true->origin->type == PV_SWITCH ) {
 snprintf(appargs,sizeof(appargs),"%s,%d", pr->goto_true->exten->name, pr->goto_true->priority_num);
 } else if (pr->goto_true->origin && pr->goto_true->origin->type == PV_IFTIME && pr->goto_true->origin->u3.else_statements ) {
 snprintf(appargs,sizeof(appargs),"%d", pr->goto_true->priority_num+1);
 } else
 snprintf(appargs,sizeof(appargs),"%d", pr->goto_true->priority_num);
 break;

 case AEL_FOR_CONTROL: /* WHILE loop test, FOR loop test */
 strcpy(app,"GotoIf");
 snprintf(appargs,sizeof(appargs),"%s?%d:%d", pr->appargs, pr->priority_num+1, pr->goto_false->priority_num);
 break;

 case AEL_IF_CONTROL:
 strcpy(app,"GotoIf");
 if (pr->origin->u3.else_statements )
 snprintf(appargs,sizeof(appargs),"%s?%d:%d", pr->appargs, pr->priority_num+1, pr->goto_false->priority_num+1);
 else
 snprintf(appargs,sizeof(appargs),"%s?%d:%d", pr->appargs, pr->priority_num+1, pr->goto_false->priority_num);
 break;

 case AEL_RAND_CONTROL:
 strcpy(app,"Random");
 snprintf(appargs,sizeof(appargs),"%s:%d", pr->appargs, pr->goto_true->priority_num+1);
 break;

 case AEL_IFTIME_CONTROL:
 strcpy(app,"GotoIfTime");
 snprintf(appargs,sizeof(appargs),"%s?%d", pr->appargs, pr->priority_num+2);
 break;

 case AEL_RETURN:
 strcpy(app,"Return");
 appargs[0] = 0;
 break;

 default:
 break;
 }
 if (last && last->type == AEL_LABEL ) {
 label = last->origin->u1.str;
 }
 else
 label = 0;

 if (ast_add_extension2(exten->context, 0 /*no replace*/, realext, pr->priority_num, (label?label:NULL), exten->cidmatch,
 app, strdup(appargs), ast_free_ptr, registrar, NULL, 0)) {
 ast_log(LOG_WARNING, "Unable to add step at priority '%d' of extension '%s'\n", pr->priority_num,
 exten->name);
 }
 last = pr;
 }
 exten = exten->next_exten;
 } while ( exten );
}

static void attach_exten(struct ael_extension **list, struct ael_extension *newmem)
{
 /* travel to the end of the list... */
 struct ael_extension *lptr;
 if( !*list ) {
 *list = newmem;
 return;
 }
 lptr = *list;

 while( lptr->next_exten ) {
 lptr = lptr->next_exten;
 }
 /* lptr should now pointing to the last element in the list; it has a null next_exten pointer */
 lptr->next_exten = newmem;
}

static pval *get_extension_or_contxt(pval *p)
{
 while( p && p->type != PV_EXTENSION && p->type != PV_CONTEXT && p->type != PV_MACRO ) {

 p = p->dad;
 }

 return p;
}

static pval *get_contxt(pval *p)
{
 while( p && p->type != PV_CONTEXT && p->type != PV_MACRO ) {

 p = p->dad;
 }

 return p;
}

static void fix_gotos_in_extensions(struct ael_extension *exten)
{
 struct ael_extension *e;
 for(e=exten;e;e=e->next_exten) {

 struct ael_priority *p;
 for(p=e->plist;p;p=p->next) {

 if( p->origin && p->origin->type == PV_GOTO && p->origin->u3.goto_target_in_case ) {

 /* fix the extension of the goto target to the actual extension in the post-compiled dialplan */

 pval *target = p->origin->u2.goto_target;
 struct ael_extension *z = target->u3.compiled_label;
 pval *pv2 = p->origin;
 char buf1[500];
 char *apparg_save = p->appargs;

 p->appargs = 0;
 if (!pv2->u1.list->next) /* just one -- it won't hurt to repeat the extension */ {
 snprintf(buf1,sizeof(buf1),"%s,%s", z->name, pv2->u1.list->u1.str);
 p->appargs = strdup(buf1);

 } else if (pv2->u1.list->next && !pv2->u1.list->next->next) /* two */ {
 snprintf(buf1,sizeof(buf1),"%s,%s", z->name, pv2->u1.list->next->u1.str);
 p->appargs = strdup(buf1);
 } else if (pv2->u1.list->next && pv2->u1.list->next->next) {
 snprintf(buf1,sizeof(buf1),"%s,%s,%s", pv2->u1.list->u1.str,
 z->name,
 pv2->u1.list->next->next->u1.str);
 p->appargs = strdup(buf1);
 }
 else
 printf("WHAT? The goto doesn't fall into one of three cases for GOTO????\n");

 if( apparg_save ) {
 free(apparg_save);
 }
 }
 }
 }
}

static int context_used(struct ael_extension *exten_list, struct ast_context *context)
{
 struct ael_extension *exten;
 /* Check the simple elements first */
 if (ast_walk_context_extensions(context, NULL) || ast_context_includes_count(context) || ast_context_ignorepats_count(context) || ast_context_switches_count(context)) {
 return 1;
 }
 for (exten = exten_list; exten; exten = exten->next_exten) {
 if (exten->context == context) {
 return 1;
 }
 }
 return 0;
}

int ast_compile_ael2(struct ast_context **local_contexts, struct ast_hashtab *local_table, struct pval *root)
{
 pval *p,*p2;
 struct ast_context *context;
 char buf[2000];
 struct ael_extension *exten;
 struct ael_extension *exten_list = 0;

 /* Reset the counter so that we get consistent labels between reloads */
 control_statement_count = 0;

 for (p=root; p; p=p->next ) { /* do the globals first, so they'll be there
 when we try to eval them */
 switch (p->type) {
 case PV_GLOBALS:
 /* just VARDEC elements */
 for (p2=p->u1.list; p2; p2=p2->next) {
 char buf2[2000];
 snprintf(buf2,sizeof(buf2),"%s=%s", p2->u1.str, p2->u2.val);
 pbx_builtin_setvar(NULL, buf2);
 }
 break;
 default:
 break;
 }
 }

 for (p=root; p; p=p->next ) {
 pval *lp;
 int argc;

 switch (p->type) {
 case PV_MACRO:

 context = ast_context_find_or_create(local_contexts, local_table, p->u1.str, registrar);

 exten = new_exten();
 exten->context = context;
 exten->name = strdup("~~s~~");
 argc = 1;
 for (lp=p->u2.arglist; lp; lp=lp->next) {
 /* for each arg, set up a "Set" command */
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("MSet");
 snprintf(buf,sizeof(buf),"LOCAL(%s)=${ARG%d}", lp->u1.str, argc++);
 remove_spaces_before_equals(buf);
 np2->appargs = strdup(buf);
 linkprio(exten, np2, NULL);
 }

 /* CONTAINS APPCALLS, CATCH, just like extensions... */
 if (gen_prios(exten, p->u1.str, p->u3.macro_statements, 0, context)) {
 return -1;
 }
 if (exten->return_needed) { /* most likely, this will go away */
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf,sizeof(buf),"End of Macro %s-%s",p->u1.str, exten->name);
 np2->appargs = strdup(buf);
 linkprio(exten, np2, NULL);
 exten-> return_target = np2;
 }

 set_priorities(exten);
 attach_exten(&exten_list, exten);
 break;

 case PV_GLOBALS:
 /* already done */
 break;

 case PV_CONTEXT:
 context = ast_context_find_or_create(local_contexts, local_table, p->u1.str, registrar);

 /* contexts contain: ignorepat, includes, switches, eswitches, extensions, */
 for (p2=p->u2.statements; p2; p2=p2->next) {
 pval *p3;
 char *s3;

 switch (p2->type) {
 case PV_EXTENSION:
 exten = new_exten();
 exten->name = strdup(p2->u1.str);
 exten->context = context;

 if( (s3=strchr(exten->name, '/') ) != 0 )
 {
 *s3 = 0;
 exten->cidmatch = s3+1;
 }

 if ( p2->u3.hints )
 exten->hints = strdup(p2->u3.hints);
 exten->regexten = p2->u4.regexten;
 if (gen_prios(exten, p->u1.str, p2->u2.statements, 0, context)) {
 return -1;
 }
 if (exten->return_needed) { /* returns don't generate a goto eoe (end of extension) any more, just a Return() app call) */
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf,sizeof(buf),"End of Extension %s", exten->name);
 np2->appargs = strdup(buf);
 linkprio(exten, np2, NULL);
 exten-> return_target = np2;
 }
 /* is the last priority in the extension a label? Then add a trailing no-op */
 if ( exten->plist_last && exten->plist_last->type == AEL_LABEL ) {
 struct ael_priority *np2 = new_prio();
 np2->type = AEL_APPCALL;
 np2->app = strdup("NoOp");
 snprintf(buf,sizeof(buf),"A NoOp to follow a trailing label %s", exten->plist_last->origin->u1.str);
 np2->appargs = strdup(buf);
 linkprio(exten, np2, NULL);
 }

 set_priorities(exten);
 attach_exten(&exten_list, exten);
 break;

 case PV_IGNOREPAT:
 ast_context_add_ignorepat2(context, p2->u1.str, registrar);
 break;

 case PV_INCLUDES:
 for (p3 = p2->u1.list; p3 ;p3=p3->next) {
 if ( p3->u2.arglist ) {
 snprintf(buf,sizeof(buf), "%s,%s,%s,%s,%s",
 p3->u1.str,
 p3->u2.arglist->u1.str,
 p3->u2.arglist->next->u1.str,
 p3->u2.arglist->next->next->u1.str,
 p3->u2.arglist->next->next->next->u1.str);
 ast_context_add_include2(context, buf, registrar);
 } else
 ast_context_add_include2(context, p3->u1.str, registrar);
 }
 break;

 case PV_SWITCHES:
 for (p3 = p2->u1.list; p3 ;p3=p3->next) {
 char *c = strchr(p3->u1.str, '/');
 if (c) {
 *c = '\0';
 c++;
 } else
 c = "";

 ast_context_add_switch2(context, p3->u1.str, c, 0, registrar);
 }
 break;

 case PV_ESWITCHES:
 for (p3 = p2->u1.list; p3 ;p3=p3->next) {
 char *c = strchr(p3->u1.str, '/');
 if (c) {
 *c = '\0';
 c++;
 } else
 c = "";

 ast_context_add_switch2(context, p3->u1.str, c, 1, registrar);
 }
 break;
 default:
 break;
 }
 }

 break;

 default:
 /* huh? what? */
 break;

 }
 }

 /* Create default "h" bubble context */
 if (ast_custom_function_find("DIALPLAN_EXISTS") && ast_custom_function_find("STACK_PEEK")) {
 int i;
 const char *h_context = "ael-builtin-h-bubble";
 struct ael_priority *np;
 struct {
 int priority;
 const char *app;
 const char *arg;
 } steps[] = {
 /* Start high, to avoid conflict with existing h extensions */
 { 1, "Goto", "9991" },
 /* Save the context, because after the StackPop, it disappears */
 { 9991, "Set", "~~parentcxt~~=${STACK_PEEK(1,c,1)}" },
 /* If we're not in a Gosub frame, exit */
 { 9992, "GotoIf", "$[\"${~~parentcxt~~}\"=\"\"]?9996" },
 /* Check for an "h" extension in that context */
 { 9993, "GotoIf", "${DIALPLAN_EXISTS(${~~parentcxt~~},h,1)}?9994:9996" },
 /* Pop off the stack frame to prevent an infinite loop */
 { 9994, "StackPop", "" },
 /* Finally, go there. */
 { 9995, "Goto", "${~~parentcxt~~},h,1" },
 /* Just an empty priority for jumping out early */
 { 9996, "NoOp", "" }
 };
 context = ast_context_find_or_create(local_contexts, local_table, h_context, registrar);
 if (context_used(exten_list, context)) {
 int found = 0;
 while (!found) {
 /* Pick a new context name that is not used. */
 char h_context_template[] = "/tmp/ael-builtin-h-bubble-XXXXXX";
 int fd = mkstemp(h_context_template);
 unlink(h_context_template);
 close(fd);
 context = ast_context_find_or_create(local_contexts, local_table, h_context_template + 5, registrar);
 found = !context_used(exten_list, context);
 }
 h_context = ast_get_context_name(context);
 }
 exten = new_exten();
 exten->context = context;
 exten->name = strdup("h");

 for (i = 0; i < ARRAY_LEN(steps); i++) {
 np = new_prio();
 np->type = AEL_APPCALL;
 np->priority_num = steps[i].priority;
 np->app = strdup(steps[i].app);
 np->appargs = strdup(steps[i].arg);
 linkprio(exten, np, NULL);
 }
 attach_exten(&exten_list, exten);

 /* Include the default "h" bubble context in each macro context */
 for (exten = exten_list; exten; exten = exten->next_exten) {
 /* All macros contain a "~~s~~" extension, and it's the first created. If
 * we perchance get a non-macro context, it's no big deal; the logic is
 * designed to exit out smoothly if not called from within a Gosub. */
 if (!strcmp(exten->name, "~~s~~")) {
 ast_context_add_include2(exten->context, h_context, registrar);
 }
 }
 }

 /* moved these from being done after a macro or extension were processed,
 to after all processing is done, for the sake of fixing gotos to labels inside cases... */
 /* I guess this would be considered 2nd pass of compiler now... */
 fix_gotos_in_extensions(exten_list); /* find and fix extension ref in gotos to labels that are in case statements */
 add_extensions(exten_list); /* actually makes calls to create priorities in ast_contexts -- feeds dialplan to asterisk */
 destroy_extensions(exten_list); /* all that remains is an empty husk, discard of it as is proper */

 return 0;
}


/* DESTROY the PVAL tree ============================================================================ */



void destroy_pval_item(pval *item)
{
 if (item == NULL) {
 ast_log(LOG_WARNING, "null item\n");
 return;
 }

 if (item->filename)
 free(item->filename);

 switch (item->type) {
 case PV_WORD:
 /* fields: item->u1.str == string associated with this (word). */
 if (item->u1.str )
 free(item->u1.str);
 if ( item->u2.arglist )
 destroy_pval(item->u2.arglist);
 break;

 case PV_MACRO:
 /* fields: item->u1.str == name of macro
 item->u2.arglist == pval list of PV_WORD arguments of macro, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg

 item->u3.macro_statements == pval list of statements in macro body.
 */
 destroy_pval(item->u2.arglist);
 if (item->u1.str )
 free(item->u1.str);
 destroy_pval(item->u3.macro_statements);
 break;

 case PV_CONTEXT:
 /* fields: item->u1.str == name of context
 item->u2.statements == pval list of statements in context body
 item->u3.abstract == int 1 if an abstract keyword were present
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.statements);
 break;

 case PV_MACRO_CALL:
 /* fields: item->u1.str == name of macro to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.arglist);
 break;

 case PV_APPLICATION_CALL:
 /* fields: item->u1.str == name of application to call
 item->u2.arglist == pval list of PV_WORD arguments of macro call, as given by user
 item->u2.arglist->u1.str == argument
 item->u2.arglist->next == next arg
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.arglist);
 break;

 case PV_CASE:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.statements);
 break;

 case PV_PATTERN:
 /* fields: item->u1.str == value of case
 item->u2.statements == pval list of statements under the case
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.statements);
 break;

 case PV_DEFAULT:
 /* fields:
 item->u2.statements == pval list of statements under the case
 */
 destroy_pval(item->u2.statements);
 break;

 case PV_CATCH:
 /* fields: item->u1.str == name of extension to catch
 item->u2.statements == pval list of statements in context body
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.statements);
 break;

 case PV_SWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 destroy_pval(item->u1.list);
 break;

 case PV_ESWITCHES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 */
 destroy_pval(item->u1.list);
 break;

 case PV_INCLUDES:
 /* fields: item->u1.list == pval list of PV_WORD elements, one per entry in the list
 item->u2.arglist == pval list of 4 PV_WORD elements for time values
 */
 destroy_pval(item->u1.list);
 break;

 case PV_STATEMENTBLOCK:
 /* fields: item->u1.list == pval list of statements in block, one per entry in the list
 */
 destroy_pval(item->u1.list);
 break;

 case PV_LOCALVARDEC:
 case PV_VARDEC:
 /* fields: item->u1.str == variable name
 item->u2.val == variable value to assign
 */
 if (item->u1.str)
 free(item->u1.str);
 if (item->u2.val)
 free(item->u2.val);
 break;

 case PV_GOTO:
 /* fields: item->u1.list == pval list of PV_WORD target names, up to 3, in order as given by user.
 item->u1.list->u1.str == where the data on a PV_WORD will always be.
 */

 destroy_pval(item->u1.list);
 break;

 case PV_LABEL:
 /* fields: item->u1.str == label name
 */
 if (item->u1.str)
 free(item->u1.str);
 break;

 case PV_FOR:
 /* fields: item->u1.for_init == a string containing the initalizer
 item->u2.for_test == a string containing the loop test
 item->u3.for_inc == a string containing the loop increment

 item->u4.for_statements == a pval list of statements in the for ()
 */
 if (item->u1.for_init)
 free(item->u1.for_init);
 if (item->u2.for_test)
 free(item->u2.for_test);
 if (item->u3.for_inc)
 free(item->u3.for_inc);
 destroy_pval(item->u4.for_statements);
 break;

 case PV_WHILE:
 /* fields: item->u1.str == the while conditional, as supplied by user

 item->u2.statements == a pval list of statements in the while ()
 */
 if (item->u1.str)
 free(item->u1.str);
 destroy_pval(item->u2.statements);
 break;