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###################################################
# check that a parsed IDL file is valid
# Copyright tridge@samba.org 2003
# released under the GNU GPL
package IdlValidator;
use Data::Dumper;
use strict;
#####################################################################
# signal a fatal validation error
sub fatal($)
{
my $s = shift;
print "$s\n";
die "IDL is not valid\n";
}
sub el_name($)
{
my $e = shift;
if ($e->{PARENT} && $e->{PARENT}->{NAME}) {
return "$e->{PARENT}->{NAME}.$e->{NAME}";
}
if ($e->{PARENT} && $e->{PARENT}->{PARENT}->{NAME}) {
return "$e->{PARENT}->{PARENT}->{NAME}.$e->{NAME}";
}
if ($e->{PARENT}) {
return "$e->{PARENT}->{NAME}.$e->{NAME}";
}
return $e->{NAME};
}
#####################################################################
# parse a struct
sub ValidElement($)
{
my $e = shift;
if ($e->{POINTERS} && $e->{POINTERS} > 1) {
fatal(el_name($e) . " : pidl cannot handle multiple pointer levels. Use a sub-structure containing a pointer instead\n");
}
if ($e->{POINTERS} && $e->{ARRAY_LEN}) {
fatal(el_name($e) . " : pidl cannot handle pointers to arrays. Use a substructure instead\n");
}
}
#####################################################################
# parse a struct
sub ValidStruct($)
{
my($struct) = shift;
foreach my $e (@{$struct->{ELEMENTS}}) {
$e->{PARENT} = $struct;
ValidElement($e);
}
}
#####################################################################
# parse a union
sub ValidUnion($)
{
my($union) = shift;
foreach my $e (@{$union->{ELEMENTS}}) {
$e->{PARENT} = $union;
if (defined($e->{PROPERTIES}->{default}) and
defined($e->{PROPERTIES}->{case})) {
fatal "Union member $e->{NAME} can not have both default and case properties!\n";
}
unless (defined ($e->{PROPERTIES}->{default}) or
defined ($e->{PROPERTIES}->{case})) {
fatal "Union member $e->{NAME} must have default or case property\n";
}
ValidElement($e);
}
}
#####################################################################
# parse a typedef
sub ValidTypedef($)
{
my($typedef) = shift;
my $data = $typedef->{DATA};
$data->{PARENT} = $typedef;
if (ref($data) eq "HASH") {
if ($data->{TYPE} eq "STRUCT") {
ValidStruct($data);
}
if ($data->{TYPE} eq "UNION") {
ValidUnion($data);
}
}
}
#####################################################################
# parse a function
sub ValidFunction($)
{
my($fn) = shift;
foreach my $e (@{$fn->{ELEMENTS}}) {
$e->{PARENT} = $fn;
if (util::has_property($e, "ref") && !$e->{POINTERS}) {
fatal "[ref] variables must be pointers ($fn->{NAME}/$e->{NAME})\n";
}
ValidElement($e);
}
}
#####################################################################
# parse the interface definitions
sub ValidInterface($)
{
my($interface) = shift;
my($data) = $interface->{DATA};
if (util::has_property($interface, "object")) {
if(util::has_property($interface, "version") &&
$interface->{PROPERTIES}->{version} != 0) {
fatal "Object interfaces must have version 0.0 ($interface->{NAME})\n";
}
if(!defined($interface->{BASE}) &&
not ($interface->{NAME} eq "IUnknown")) {
fatal "Object interfaces must all derive from IUnknown ($interface->{NAME})\n";
}
}
foreach my $d (@{$data}) {
($d->{TYPE} eq "TYPEDEF") &&
ValidTypedef($d);
($d->{TYPE} eq "FUNCTION") &&
ValidFunction($d);
}
}
#####################################################################
# parse a parsed IDL into a C header
sub Validate($)
{
my($idl) = shift;
foreach my $x (@{$idl}) {
($x->{TYPE} eq "INTERFACE") &&
ValidInterface($x);
}
}
1;
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