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###################################################
# create C header files for an IDL structure
# Copyright tridge@samba.org 2000
# released under the GNU GPL
package IdlHeader;
use Data::Dumper;
my($res);
my($tab_depth);
sub tabs()
{
for (my($i)=0; $i < $tab_depth; $i++) {
$res .= "\t";
}
}
#####################################################################
# dump a properties list
sub DumpProperties($)
{
my($props) = shift;
return;
foreach my $d (@{$props}) {
if (ref($d) ne "HASH") {
$res .= "/* [$d] */ ";
} else {
foreach my $k (keys %{$d}) {
$res .= "/* [$k($d->{$k})] */ ";
}
}
}
}
#####################################################################
# dump a structure element
sub DumpElement($)
{
my($element) = shift;
if (util::has_property($element->{PROPERTIES}, "struct_len")) {
# a struct_len is an internal artifact - it is put on the
# wire but not exposed via the api, which means it does
# not appear in the header file
return;
}
(defined $element->{PROPERTIES}) && DumpProperties($element->{PROPERTIES});
$res .= tabs();
DumpType($element->{TYPE}, "");
$res .= " ";
if ($element->{POINTERS}) {
my($n) = $element->{POINTERS};
if (util::is_scalar_type($element->{TYPE}) &&
util::has_property($element->{PROPERTIES}, "ref")) {
$n--;
}
for (my($i)=$n; $i > 0; $i--) {
$res .= "*";
}
}
$res .= "$element->{NAME}";
(defined $element->{ARRAY_LEN}) && ($res .= "[$element->{ARRAY_LEN}]");
$res .= ";\n";
}
#####################################################################
# dump a struct
sub DumpStruct($$)
{
my($struct) = shift;
my($name) = shift;
$res .= "struct $name {\n";
$tab_depth++;
if (defined $struct->{ELEMENTS}) {
foreach my $e (@{$struct->{ELEMENTS}}) {
DumpElement($e);
}
}
$tab_depth--;
$res .= "}";
}
#####################################################################
# dump a union element
sub DumpUnionElement($)
{
my($element) = shift;
$res .= "/* [case($element->{CASE})] */ ";
DumpElement($element->{DATA});
}
#####################################################################
# dump a union
sub DumpUnion($$)
{
my($union) = shift;
my($name) = shift;
(defined $union->{PROPERTIES}) && DumpProperties($union->{PROPERTIES});
$res .= "union $name {\n";
foreach my $e (@{$union->{DATA}}) {
DumpUnionElement($e);
}
$res .= "}";
}
#####################################################################
# dump a type
sub DumpType($$)
{
my($data) = shift;
my($name) = shift;
if (ref($data) eq "HASH") {
($data->{TYPE} eq "STRUCT") &&
DumpStruct($data, $name);
($data->{TYPE} eq "UNION") &&
DumpUnion($data, $name);
return;
}
if ($data =~ "unistr") {
$res .= "const char";
} elsif (util::is_scalar_type($data)) {
$res .= "$data";
} else {
$res .= "struct $data";
}
}
#####################################################################
# dump a typedef
sub DumpTypedef($)
{
my($typedef) = shift;
DumpType($typedef->{DATA}, $typedef->{NAME});
$res .= ";\n\n";
}
#####################################################################
# dump a function
sub DumpFunctionInOut($$)
{
my($fn) = shift;
my($prop) = shift;
foreach my $e (@{$fn->{DATA}}) {
if (util::has_property($e->{PROPERTIES}, $prop)) {
DumpElement($e);
}
}
}
#####################################################################
# dump a function
sub DumpFunction($)
{
my($fn) = shift;
$res .= "struct $fn->{NAME} {\n";
$tab_depth++;
tabs();
$res .= "struct {\n";
$tab_depth++;
DumpFunctionInOut($fn, "in");
$tab_depth--;
tabs();
$res .= "} in;\n\n";
tabs();
$res .= "struct {\n";
$tab_depth++;
DumpFunctionInOut($fn, "out");
if ($fn->{RETURN_TYPE}) {
tabs();
$res .= "$fn->{RETURN_TYPE} result;\n";
}
$tab_depth--;
tabs();
$res .= "} out;\n\n";
$tab_depth--;
$res .= "};\n\n";
}
#####################################################################
# dump the interface definitions
sub DumpInterface($)
{
my($interface) = shift;
my($data) = $interface->{DATA};
foreach my $d (@{$data}) {
($d->{TYPE} eq "TYPEDEF") &&
DumpTypedef($d);
($d->{TYPE} eq "FUNCTION") &&
DumpFunction($d);
}
}
#####################################################################
# dump a parsed IDL structure back into an IDL file
sub Dump($)
{
my($idl) = shift;
$tab_depth = 0;
$res = "/* header auto-generated by pidl */\n\n";
foreach my $x (@{$idl}) {
($x->{TYPE} eq "INTERFACE") &&
DumpInterface($x);
}
return $res;
}
1;
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