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###################################################
# Ethereal parser generator for IDL structures
# Copyright tpot@samba.org 2001
# Copyright tridge@samba.org 2000
# released under the GNU GPL
package IdlParser;
use Data::Dumper;
my($res);
#####################################################################
# parse a properties list
sub ParseProperties($)
{
my($props) = shift;
foreach my $d (@{$props}) {
if (ref($d) ne "HASH") {
$res .= "[$d] ";
} else {
foreach my $k (keys %{$d}) {
$res .= "[$k($d->{$k})] ";
}
}
}
}
#####################################################################
# parse an array - called in buffers context
sub ParseArray($)
{
my($elt) = shift;
$res .= "\tfor (i = 0; i < count; i++) {\n";
if (util::is_scalar_type($elt)) {
$res .= "\t\toffset = prs_$elt->{TYPE}(tvb, offset, pinfo, tree, NULL, \"$elt->{NAME});\n";
$res .= "\t}\n\n";
} else {
$res .= "\t\toffset = prs_$elt->{TYPE}(tvb, offset, pinfo, tree, \"PARSE_SCALARS\", \"$elt->{NAME}\");\n";
$res .= "\t}\n\n";
$res .= "\tfor (i = 0; i < count; i++) {\n";
$res .= "\t\toffset = prs_$elt->{TYPE}(tvb, offset, pinfo, tree, \"PARSE_BUFFERS\", \"$elt->{NAME}\");\n";
$res .= "\t}\n\n";
}
}
#####################################################################
# parse scalars in a structure element
sub ParseElementScalars($$)
{
my($elt) = shift;
my($var_prefix) = shift;
if (defined $elt->{VALUE}) {
$res .= "\tNDR_CHECK(ndr_push_$elt->{TYPE}(ndr, $elt->{VALUE}));\n";
} elsif ($elt->{POINTERS} &&
!util::has_property($elt->{PROPERTIES}, "ref")) {
$res .= "\tNDR_CHECK(ndr_push_ptr(ndr, $var_prefix$elt->{NAME}));\n";
} else {
$res .= "\tNDR_CHECK(ndr_push_$elt->{TYPE}(ndr, $var_prefix$elt->{NAME}));\n";
}
}
#####################################################################
# parse buffers in a structure element
sub ParseElementBuffers($$)
{
my($elt) = shift;
my($var_prefix) = shift;
if (util::has_property($elt->{PROPERTIES}, "ref")) {
return;
}
if (util::is_scalar_type($elt->{TYPE}) && !$elt->{POINTERS}) {
return;
}
if ($elt->{POINTERS}) {
$res .= "\tif ($var_prefix$elt->{NAME}) {\n\t";
}
if (util::has_property($elt->{PROPERTIES}, "size_is")) {
ParseArray($elt);
} else {
if (util::is_scalar_type($elt->{TYPE})) {
$res .= "\tNDR_CHECK(ndr_push_$elt->{TYPE}(ndr, *$var_prefix$elt->{NAME}));\n";
} else {
$res .= "\tNDR_CHECK(ndr_push_$elt->{TYPE}(ndr, $var_prefix$elt->{NAME}));\n";
}
}
if ($elt->{POINTERS}) {
$res .= "\t}\n";
}
}
#####################################################################
# parse a struct
sub ParseStruct($)
{
my($struct) = shift;
my($struct_len);
if (! defined $struct->{ELEMENTS}) {
return;
}
# see if we have a structure length
foreach my $e (@{$struct->{ELEMENTS}}) {
if (util::has_property($e->{PROPERTIES}, "struct_len")) {
$struct_len = $e;
$e->{VALUE} = "0";
}
}
if (defined $struct_len) {
$res .= "\tstruct ndr_push_save len_save1, len_save2, len_save3;\n";
$res .= "\tndr_push_save(ndr, &len_save1);\n";
}
foreach my $e (@{$struct->{ELEMENTS}}) {
if ($e == $struct_len) {
$res .= "\tNDR_CHECK(ndr_push_align_$e->{TYPE}(ndr));\n";
$res .= "\tndr_push_save(ndr, &len_save2);\n";
}
ParseElementScalars($e, "r->");
}
foreach my $e (@{$struct->{ELEMENTS}}) {
ParseElementBuffers($e, "r->");
}
if (defined $struct_len) {
$res .= "\tndr_push_save(ndr, &len_save3);\n";
$res .= "\tndr_push_restore(ndr, &len_save2);\n";
$struct_len->{VALUE} = "len_save3.offset - len_save1.offset";
ParseElementScalars($struct_len, "r->");
$res .= "\tndr_push_restore(ndr, &len_save3);\n";
}
}
#####################################################################
# parse a union element
sub ParseUnionElement($)
{
my($element) = shift;
$res .= "\tcase $element->{DATA}->{NAME}: \n";
$res .= "\t\toffset = prs_$element->{DATA}->{TYPE}(tvb, offset, pinfo, tree, \"$element->{DATA}->{NAME}\");\n\t\tbreak;\n";
}
#####################################################################
# parse a union
sub ParseUnion($)
{
my($union) = shift;
$res .= "\tswitch (level) {\n";
(defined $union->{PROPERTIES}) && ParseProperties($union->{PROPERTIES});
foreach my $e (@{$union->{DATA}}) {
ParseUnionElement($e);
}
$res .= "\t}\n";
}
#####################################################################
# parse a type
sub ParseType($)
{
my($data) = shift;
if (ref($data) eq "HASH") {
($data->{TYPE} eq "STRUCT") &&
ParseStruct($data);
($data->{TYPE} eq "UNION") &&
ParseUnion($data);
} else {
$res .= "$data";
}
}
#####################################################################
# parse a typedef
sub ParseTypedef($)
{
my($typedef) = shift;
$res .= "static NTSTATUS ndr_push_$typedef->{NAME}(struct ndr_push *ndr, struct $typedef->{NAME} *r)";
$res .= "\n{\n";
ParseType($typedef->{DATA});
$res .= "\treturn NT_STATUS_OK;\n";
$res .= "}\n\n";
}
#####################################################################
# parse a function
sub ParseFunctionArg($$)
{
my($arg) = shift;
my($io) = shift; # "in" or "out"
if (!util::has_property($arg->{PROPERTIES}, $io)) {
return;
}
ParseElementScalars($arg, "r->in.");
ParseElementBuffers($arg, "r->in.");
}
#####################################################################
# parse a function
sub ParseFunctionPush($)
{
my($function) = shift;
# Input function
$res .= "NTSTATUS ndr_push_$function->{NAME}(struct ndr_push *ndr, struct $function->{NAME} *r)\n{\n";
foreach my $arg (@{$function->{DATA}}) {
ParseFunctionArg($arg, "in");
}
$res .= "\n\treturn NT_STATUS_OK;\n}\n\n";
}
#####################################################################
# parse a function
sub ParseFunctionPull($)
{
}
#####################################################################
# parse a function
sub ParseFunction($)
{
my $i = shift;
ParseFunctionPush($i);
ParseFunctionPull($i);
}
#####################################################################
# parse the interface definitions
sub ParseInterface($)
{
my($interface) = shift;
my($data) = $interface->{DATA};
foreach my $d (@{$data}) {
($d->{TYPE} eq "TYPEDEF") &&
ParseTypedef($d);
($d->{TYPE} eq "FUNCTION") &&
ParseFunction($d);
}
}
#####################################################################
# parse a parsed IDL structure back into an IDL file
sub Parse($)
{
my($idl) = shift;
$res = "/* parser auto-generated by pidl */\n\n";
foreach my $x (@{$idl}) {
($x->{TYPE} eq "INTERFACE") &&
ParseInterface($x);
}
return $res;
}
1;
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