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wireshark/tools/pidl/lib/Parse/Pidl/NDR.pm

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###################################################
# Samba4 NDR info tree generator
# Copyright tridge@samba.org 2000-2003
# Copyright tpot@samba.org 2001
# Copyright jelmer@samba.org 2004-2006
# released under the GNU GPL
=pod
=head1 NAME
Parse::Pidl::NDR - NDR parsing information generator
=head1 DESCRIPTION
Return a table describing the order in which the parts of an element
should be parsed
Possible level types:
- POINTER
- ARRAY
- SUBCONTEXT
- SWITCH
- DATA
=head1 AUTHOR
Jelmer Vernooij <jelmer@samba.org>
=cut
package Parse::Pidl::NDR;
require Exporter;
use vars qw($VERSION);
$VERSION = '0.01';
@ISA = qw(Exporter);
@EXPORT = qw(GetPrevLevel GetNextLevel ContainsDeferred ContainsString);
@EXPORT_OK = qw(GetElementLevelTable ParseElement ValidElement align_type mapToScalar ParseType can_contain_deferred is_charset_array);
use strict;
use Parse::Pidl qw(warning fatal);
use Parse::Pidl::Typelist qw(hasType getType expandAlias);
use Parse::Pidl::Util qw(has_property property_matches);
# Alignment of the built-in scalar types
my $scalar_alignment = {
'void' => 0,
'char' => 1,
'int8' => 1,
'uint8' => 1,
'int16' => 2,
'uint16' => 2,
'int1632' => 3,
'uint1632' => 3,
'int32' => 4,
'uint32' => 4,
'int3264' => 5,
'uint3264' => 5,
'hyper' => 8,
'double' => 8,
'pointer' => 8,
'dlong' => 4,
'udlong' => 4,
'udlongr' => 4,
'DATA_BLOB' => 4,
'string' => 4,
'string_array' => 4, #???
'time_t' => 4,
'NTTIME' => 4,
'NTTIME_1sec' => 4,
'NTTIME_hyper' => 8,
'WERROR' => 4,
'NTSTATUS' => 4,
'COMRESULT' => 4,
'nbt_string' => 4,
'wrepl_nbt_name' => 4,
'ipv4address' => 4
};
sub GetElementLevelTable($$)
{
my ($e, $pointer_default) = @_;
my $order = [];
my $is_deferred = 0;
my @bracket_array = ();
my @length_is = ();
my @size_is = ();
my $pointer_idx = 0;
if (has_property($e, "size_is")) {
@size_is = split /,/, has_property($e, "size_is");
}
if (has_property($e, "length_is")) {
@length_is = split /,/, has_property($e, "length_is");
}
if (defined($e->{ARRAY_LEN})) {
@bracket_array = @{$e->{ARRAY_LEN}};
}
if (has_property($e, "out")) {
my $needptrs = 1;
if (has_property($e, "string")) { $needptrs++; }
if ($#bracket_array >= 0) { $needptrs = 0; }
warning($e, "[out] argument `$e->{NAME}' not a pointer") if ($needptrs > $e->{POINTERS});
}
# Parse the [][][][] style array stuff
for my $i (0 .. $#bracket_array) {
my $d = $bracket_array[$#bracket_array - $i];
my $size = $d;
my $length = $d;
my $is_surrounding = 0;
my $is_varying = 0;
my $is_conformant = 0;
my $is_string = 0;
my $is_fixed = 0;
my $is_inline = 0;
if ($d eq "*") {
$is_conformant = 1;
if ($size = shift @size_is) {
} elsif ((scalar(@size_is) == 0) and has_property($e, "string")) {
$is_string = 1;
delete($e->{PROPERTIES}->{string});
} else {
fatal($e, "Must specify size_is() for conformant array!")
}
if (($length = shift @length_is) or $is_string) {
$is_varying = 1;
} else {
$length = $size;
}
if ($e == $e->{PARENT}->{ELEMENTS}[-1]
and $e->{PARENT}->{TYPE} ne "FUNCTION") {
$is_surrounding = 1;
}
}
$is_fixed = 1 if (not $is_conformant and Parse::Pidl::Util::is_constant($size));
$is_inline = 1 if (not $is_conformant and not Parse::Pidl::Util::is_constant($size));
if ($i == 0 and $is_fixed and has_property($e, "string")) {
$is_fixed = 0;
$is_varying = 1;
$is_string = 1;
delete($e->{PROPERTIES}->{string});
}
push (@$order, {
TYPE => "ARRAY",
SIZE_IS => $size,
LENGTH_IS => $length,
IS_DEFERRED => $is_deferred,
IS_SURROUNDING => $is_surrounding,
IS_ZERO_TERMINATED => $is_string,
IS_VARYING => $is_varying,
IS_CONFORMANT => $is_conformant,
IS_FIXED => $is_fixed,
IS_INLINE => $is_inline
});
}
# Next, all the pointers
foreach my $i (1..$e->{POINTERS}) {
my $level = "EMBEDDED";
# Top level "ref" pointers do not have a referrent identifier
$level = "TOP" if ($i == 1 and $e->{PARENT}->{TYPE} eq "FUNCTION");
my $pt;
#
# Only the first level gets the pointer type from the
# pointer property, the others get them from
# the pointer_default() interface property
#
# see http://msdn2.microsoft.com/en-us/library/aa378984(VS.85).aspx
# (Here they talk about the rightmost pointer, but testing shows
# they mean the leftmost pointer.)
#
# --metze
#
$pt = pointer_type($e);
if ($i > 1) {
$is_deferred = 1 if ($pt ne "ref" and $e->{PARENT}->{TYPE} eq "FUNCTION");
$pt = $pointer_default;
}
push (@$order, {
TYPE => "POINTER",
POINTER_TYPE => $pt,
POINTER_INDEX => $pointer_idx,
IS_DEFERRED => "$is_deferred",
LEVEL => $level
});
warning($e, "top-level \[out\] pointer `$e->{NAME}' is not a \[ref\] pointer")
if ($i == 1 and $pt ne "ref" and
$e->{PARENT}->{TYPE} eq "FUNCTION" and
not has_property($e, "in"));
$pointer_idx++;
# everything that follows will be deferred
$is_deferred = 1 if ($level ne "TOP");
my $array_size = shift @size_is;
my $array_length;
my $is_varying;
my $is_conformant;
my $is_string = 0;
if ($array_size) {
$is_conformant = 1;
if ($array_length = shift @length_is) {
$is_varying = 1;
} else {
$array_length = $array_size;
$is_varying =0;
}
}
if (scalar(@size_is) == 0 and has_property($e, "string") and
$i == $e->{POINTERS}) {
$is_string = 1;
$is_varying = $is_conformant = has_property($e, "noheader")?0:1;
delete($e->{PROPERTIES}->{string});
}
if ($array_size or $is_string) {
push (@$order, {
TYPE => "ARRAY",
SIZE_IS => $array_size,
LENGTH_IS => $array_length,
IS_DEFERRED => $is_deferred,
IS_SURROUNDING => 0,
IS_ZERO_TERMINATED => $is_string,
IS_VARYING => $is_varying,
IS_CONFORMANT => $is_conformant,
IS_FIXED => 0,
IS_INLINE => 0
});
$is_deferred = 0;
}
}
if (defined(has_property($e, "subcontext"))) {
my $hdr_size = has_property($e, "subcontext");
my $subsize = has_property($e, "subcontext_size");
if (not defined($subsize)) {
$subsize = -1;
}
push (@$order, {
TYPE => "SUBCONTEXT",
HEADER_SIZE => $hdr_size,
SUBCONTEXT_SIZE => $subsize,
IS_DEFERRED => $is_deferred,
COMPRESSION => has_property($e, "compression"),
});
}
if (my $switch = has_property($e, "switch_is")) {
push (@$order, {
TYPE => "SWITCH",
SWITCH_IS => $switch,
IS_DEFERRED => $is_deferred
});
}
if (scalar(@size_is) > 0) {
fatal($e, "size_is() on non-array element");
}
if (scalar(@length_is) > 0) {
fatal($e, "length_is() on non-array element");
}
if (has_property($e, "string")) {
fatal($e, "string() attribute on non-array element");
}
push (@$order, {
TYPE => "DATA",
DATA_TYPE => $e->{TYPE},
IS_DEFERRED => $is_deferred,
CONTAINS_DEFERRED => can_contain_deferred($e->{TYPE}),
IS_SURROUNDING => 0 #FIXME
});
my $i = 0;
foreach (@$order) { $_->{LEVEL_INDEX} = $i; $i+=1; }
return $order;
}
sub GetTypedefLevelTable($$$)
{
my ($e, $data, $pointer_default) = @_;
my $order = [];
push (@$order, {
TYPE => "TYPEDEF"
});
my $i = 0;
foreach (@$order) { $_->{LEVEL_INDEX} = $i; $i+=1; }
return $order;
}
#####################################################################
# see if a type contains any deferred data
sub can_contain_deferred($)
{
sub can_contain_deferred($);
my ($type) = @_;
return 1 unless (hasType($type)); # assume the worst
$type = getType($type);
return 0 if (Parse::Pidl::Typelist::is_scalar($type));
return can_contain_deferred($type->{DATA}) if ($type->{TYPE} eq "TYPEDEF");
return 0 unless defined($type->{ELEMENTS});
foreach (@{$type->{ELEMENTS}}) {
return 1 if ($_->{POINTERS});
return 1 if (can_contain_deferred ($_->{TYPE}));
}
return 0;
}
sub pointer_type($)
{
my $e = shift;
return undef unless $e->{POINTERS};
return "ref" if (has_property($e, "ref"));
return "full" if (has_property($e, "ptr"));
return "sptr" if (has_property($e, "sptr"));
return "unique" if (has_property($e, "unique"));
return "relative" if (has_property($e, "relative"));
return "ignore" if (has_property($e, "ignore"));
return undef;
}
#####################################################################
# work out the correct alignment for a structure or union
sub find_largest_alignment($)
{
my $s = shift;
my $align = 1;
for my $e (@{$s->{ELEMENTS}}) {
my $a = 1;
if ($e->{POINTERS}) {
# this is a hack for NDR64
# the NDR layer translates this into
# an alignment of 4 for NDR and 8 for NDR64
$a = 5;
} elsif (has_property($e, "subcontext")) {
$a = 1;
} elsif (has_property($e, "transmit_as")) {
$a = align_type($e->{PROPERTIES}->{transmit_as});
} else {
$a = align_type($e->{TYPE});
}
$align = $a if ($align < $a);
}
return $align;
}
#####################################################################
# align a type
sub align_type($)
{
sub align_type($);
my ($e) = @_;
if (ref($e) eq "HASH" and $e->{TYPE} eq "SCALAR") {
return $scalar_alignment->{$e->{NAME}};
}
return 0 if ($e eq "EMPTY");
unless (hasType($e)) {
# it must be an external type - all we can do is guess
# warning($e, "assuming alignment of unknown type '$e' is 4");
return 4;
}
my $dt = getType($e);
if ($dt->{TYPE} eq "TYPEDEF") {
return align_type($dt->{DATA});
} elsif ($dt->{TYPE} eq "CONFORMANCE") {
return $dt->{DATA}->{ALIGN};
} elsif ($dt->{TYPE} eq "ENUM") {
return align_type(Parse::Pidl::Typelist::enum_type_fn($dt));
} elsif ($dt->{TYPE} eq "BITMAP") {
return align_type(Parse::Pidl::Typelist::bitmap_type_fn($dt));
} elsif (($dt->{TYPE} eq "STRUCT") or ($dt->{TYPE} eq "UNION")) {
# Struct/union without body: assume 4
return 4 unless (defined($dt->{ELEMENTS}));
return find_largest_alignment($dt);
}
die("Unknown data type type $dt->{TYPE}");
}
sub ParseElement($$)
{
my ($e, $pointer_default) = @_;
$e->{TYPE} = expandAlias($e->{TYPE});
if (ref($e->{TYPE}) eq "HASH") {
$e->{TYPE} = ParseType($e->{TYPE}, $pointer_default);
}
return {
NAME => $e->{NAME},
TYPE => $e->{TYPE},
PROPERTIES => $e->{PROPERTIES},
LEVELS => GetElementLevelTable($e, $pointer_default),
REPRESENTATION_TYPE => ($e->{PROPERTIES}->{represent_as} or $e->{TYPE}),
ALIGN => align_type($e->{TYPE}),
ORIGINAL => $e
};
}
sub ParseStruct($$)
{
my ($struct, $pointer_default) = @_;
my @elements = ();
my $surrounding = undef;
return {
TYPE => "STRUCT",
NAME => $struct->{NAME},
SURROUNDING_ELEMENT => undef,
ELEMENTS => undef,
PROPERTIES => $struct->{PROPERTIES},
ORIGINAL => $struct,
ALIGN => undef
} unless defined($struct->{ELEMENTS});
CheckPointerTypes($struct, $pointer_default);
foreach my $x (@{$struct->{ELEMENTS}})
{
my $e = ParseElement($x, $pointer_default);
if ($x != $struct->{ELEMENTS}[-1] and
$e->{LEVELS}[0]->{IS_SURROUNDING}) {
fatal($x, "conformant member not at end of struct");
}
push @elements, $e;
}
my $e = $elements[-1];
if (defined($e) and defined($e->{LEVELS}[0]->{IS_SURROUNDING}) and
$e->{LEVELS}[0]->{IS_SURROUNDING}) {
$surrounding = $e;
}
if (defined $e->{TYPE} && $e->{TYPE} eq "string"
&& property_matches($e, "flag", ".*LIBNDR_FLAG_STR_CONFORMANT.*")) {
$surrounding = $struct->{ELEMENTS}[-1];
}
my $align = undef;
if ($struct->{NAME}) {
$align = align_type($struct->{NAME});
}
return {
TYPE => "STRUCT",
NAME => $struct->{NAME},
SURROUNDING_ELEMENT => $surrounding,
ELEMENTS => \@elements,
PROPERTIES => $struct->{PROPERTIES},
ORIGINAL => $struct,
ALIGN => $align
};
}
sub ParseUnion($$)
{
my ($e, $pointer_default) = @_;
my @elements = ();
my $hasdefault = 0;
my $switch_type = has_property($e, "switch_type");
unless (defined($switch_type)) { $switch_type = "uint32"; }
if (has_property($e, "nodiscriminant")) { $switch_type = undef; }
return {
TYPE => "UNION",
NAME => $e->{NAME},
SWITCH_TYPE => $switch_type,
ELEMENTS => undef,
PROPERTIES => $e->{PROPERTIES},
HAS_DEFAULT => $hasdefault,
ORIGINAL => $e,
ALIGN => undef
} unless defined($e->{ELEMENTS});
CheckPointerTypes($e, $pointer_default);
foreach my $x (@{$e->{ELEMENTS}})
{
my $t;
if ($x->{TYPE} eq "EMPTY") {
$t = { TYPE => "EMPTY" };
} else {
$t = ParseElement($x, $pointer_default);
}
if (has_property($x, "default")) {
$t->{CASE} = "default";
$hasdefault = 1;
} elsif (defined($x->{PROPERTIES}->{case})) {
$t->{CASE} = "case $x->{PROPERTIES}->{case}";
} else {
die("Union element $x->{NAME} has neither default nor case property");
}
push @elements, $t;
}
my $align = undef;
if ($e->{NAME}) {
$align = align_type($e->{NAME});
}
return {
TYPE => "UNION",
NAME => $e->{NAME},
SWITCH_TYPE => $switch_type,
ELEMENTS => \@elements,
PROPERTIES => $e->{PROPERTIES},
HAS_DEFAULT => $hasdefault,
ORIGINAL => $e,
ALIGN => $align
};
}
sub ParseEnum($$)
{
my ($e, $pointer_default) = @_;
return {
TYPE => "ENUM",
NAME => $e->{NAME},
BASE_TYPE => Parse::Pidl::Typelist::enum_type_fn($e),
ELEMENTS => $e->{ELEMENTS},
PROPERTIES => $e->{PROPERTIES},
ORIGINAL => $e
};
}
sub ParseBitmap($$)
{
my ($e, $pointer_default) = @_;
return {
TYPE => "BITMAP",
NAME => $e->{NAME},
BASE_TYPE => Parse::Pidl::Typelist::bitmap_type_fn($e),
ELEMENTS => $e->{ELEMENTS},
PROPERTIES => $e->{PROPERTIES},
ORIGINAL => $e
};
}
sub ParseType($$)
{
my ($d, $pointer_default) = @_;
my $data = {
STRUCT => \&ParseStruct,
UNION => \&ParseUnion,
ENUM => \&ParseEnum,
BITMAP => \&ParseBitmap,
TYPEDEF => \&ParseTypedef,
}->{$d->{TYPE}}->($d, $pointer_default);
return $data;
}
sub ParseTypedef($$)
{
my ($d, $pointer_default) = @_;
if (defined($d->{DATA}->{PROPERTIES}) && !defined($d->{PROPERTIES})) {
$d->{PROPERTIES} = $d->{DATA}->{PROPERTIES};
}
my $data = ParseType($d->{DATA}, $pointer_default);
$data->{ALIGN} = align_type($d->{NAME});
return {
NAME => $d->{NAME},
TYPE => $d->{TYPE},
PROPERTIES => $d->{PROPERTIES},
LEVELS => GetTypedefLevelTable($d, $data, $pointer_default),
DATA => $data,
ORIGINAL => $d
};
}
sub ParseConst($$)
{
my ($ndr,$d) = @_;
return $d;
}
sub ParseFunction($$$)
{
my ($ndr,$d,$opnum) = @_;
my @elements = ();
my $rettype = undef;
my $thisopnum = undef;
CheckPointerTypes($d, "ref");
if (not defined($d->{PROPERTIES}{noopnum})) {
$thisopnum = ${$opnum};
${$opnum}++;
}
foreach my $x (@{$d->{ELEMENTS}}) {
my $e = ParseElement($x, $ndr->{PROPERTIES}->{pointer_default});
push (@{$e->{DIRECTION}}, "in") if (has_property($x, "in"));
push (@{$e->{DIRECTION}}, "out") if (has_property($x, "out"));
push (@elements, $e);
}
if ($d->{RETURN_TYPE} ne "void") {
$rettype = expandAlias($d->{RETURN_TYPE});
}
my $async = 0;
if (has_property($d, "async")) { $async = 1; }
return {
NAME => $d->{NAME},
TYPE => "FUNCTION",
OPNUM => $thisopnum,
ASYNC => $async,
RETURN_TYPE => $rettype,
PROPERTIES => $d->{PROPERTIES},
ELEMENTS => \@elements,
ORIGINAL => $d
};
}
sub CheckPointerTypes($$)
{
my ($s,$default) = @_;
return unless defined($s->{ELEMENTS});
foreach my $e (@{$s->{ELEMENTS}}) {
if ($e->{POINTERS} and not defined(pointer_type($e))) {
$e->{PROPERTIES}->{$default} = '1';
}
}
}
sub FindNestedTypes($$)
{
sub FindNestedTypes($$);
my ($l, $t) = @_;
return unless defined($t->{ELEMENTS});
return if ($t->{TYPE} eq "ENUM");
return if ($t->{TYPE} eq "BITMAP");
foreach (@{$t->{ELEMENTS}}) {
if (ref($_->{TYPE}) eq "HASH") {
push (@$l, $_->{TYPE}) if (defined($_->{TYPE}->{NAME}));
FindNestedTypes($l, $_->{TYPE});
}
}
}
sub ParseInterface($)
{
my $idl = shift;
my @types = ();
my @consts = ();
my @functions = ();
my @endpoints;
my $opnum = 0;
my $version;
if (not has_property($idl, "pointer_default")) {
# MIDL defaults to "ptr" in DCE compatible mode (/osf)
# and "unique" in Microsoft Extensions mode (default)
$idl->{PROPERTIES}->{pointer_default} = "unique";
}
foreach my $d (@{$idl->{DATA}}) {
if ($d->{TYPE} eq "FUNCTION") {
push (@functions, ParseFunction($idl, $d, \$opnum));
} elsif ($d->{TYPE} eq "CONST") {
push (@consts, ParseConst($idl, $d));
} else {
push (@types, ParseType($d, $idl->{PROPERTIES}->{pointer_default}));
FindNestedTypes(\@types, $d);
}
}
$version = "0.0";
if(defined $idl->{PROPERTIES}->{version}) {
my @if_version = split(/\./, $idl->{PROPERTIES}->{version});
if ($if_version[0] == $idl->{PROPERTIES}->{version}) {
$version = $idl->{PROPERTIES}->{version};
} else {
$version = $if_version[1] << 16 | $if_version[0];
}
}
# If no endpoint is set, default to the interface name as a named pipe
if (!defined $idl->{PROPERTIES}->{endpoint}) {
push @endpoints, "\"ncacn_np:[\\\\pipe\\\\" . $idl->{NAME} . "]\"";
} else {
@endpoints = split /,/, $idl->{PROPERTIES}->{endpoint};
}
return {
NAME => $idl->{NAME},
UUID => lc(has_property($idl, "uuid")),
VERSION => $version,
TYPE => "INTERFACE",
PROPERTIES => $idl->{PROPERTIES},
FUNCTIONS => \@functions,
CONSTS => \@consts,
TYPES => \@types,
ENDPOINTS => \@endpoints
};
}
# Convert a IDL tree to a NDR tree
# Gives a result tree describing all that's necessary for easily generating
# NDR parsers / generators
sub Parse($)
{
my $idl = shift;
return undef unless (defined($idl));
Parse::Pidl::NDR::Validate($idl);
my @ndr = ();
foreach (@{$idl}) {
($_->{TYPE} eq "CPP_QUOTE") && push(@ndr, $_);
($_->{TYPE} eq "INTERFACE") && push(@ndr, ParseInterface($_));
($_->{TYPE} eq "IMPORT") && push(@ndr, $_);
}
return \@ndr;
}
sub GetNextLevel($$)
{
my $e = shift;
my $fl = shift;
my $seen = 0;
foreach my $l (@{$e->{LEVELS}}) {
return $l if ($seen);
($seen = 1) if ($l == $fl);
}
return undef;
}
sub GetPrevLevel($$)
{
my ($e,$fl) = @_;
my $prev = undef;
foreach my $l (@{$e->{LEVELS}}) {
(return $prev) if ($l == $fl);
$prev = $l;
}
return undef;
}
sub ContainsString($)
{
my ($e) = @_;
foreach my $l (@{$e->{LEVELS}}) {
return 1 if ($l->{TYPE} eq "ARRAY" and $l->{IS_ZERO_TERMINATED});
}
return 0;
}
sub ContainsDeferred($$)
{
my ($e,$l) = @_;
return 1 if ($l->{CONTAINS_DEFERRED});
while ($l = GetNextLevel($e,$l))
{
return 1 if ($l->{IS_DEFERRED});
return 1 if ($l->{CONTAINS_DEFERRED});
}
return 0;
}
sub el_name($)
{
my $e = shift;
my $name = "<ANONYMOUS>";
$name = $e->{NAME} if defined($e->{NAME});
if (defined($e->{PARENT}) and defined($e->{PARENT}->{NAME})) {
return "$e->{PARENT}->{NAME}.$name";
}
if (defined($e->{PARENT}) and
defined($e->{PARENT}->{PARENT}) and
defined($e->{PARENT}->{PARENT}->{NAME})) {
return "$e->{PARENT}->{PARENT}->{NAME}.$name";
}
return $name;
}
###################################
# find a sibling var in a structure
sub find_sibling($$)
{
my($e,$name) = @_;
my($fn) = $e->{PARENT};
if ($name =~ /\*(.*)/) {
$name = $1;
}
for my $e2 (@{$fn->{ELEMENTS}}) {
return $e2 if ($e2->{NAME} eq $name);
}
return undef;
}
my %property_list = (
# interface
"helpstring" => ["INTERFACE", "FUNCTION"],
"version" => ["INTERFACE"],
"uuid" => ["INTERFACE"],
"endpoint" => ["INTERFACE"],
"pointer_default" => ["INTERFACE"],
"helper" => ["INTERFACE"],
"pyhelper" => ["INTERFACE"],
"authservice" => ["INTERFACE"],
"restricted" => ["INTERFACE"],
# dcom
"object" => ["INTERFACE"],
"local" => ["INTERFACE", "FUNCTION"],
"iid_is" => ["ELEMENT"],
"call_as" => ["FUNCTION"],
"idempotent" => ["FUNCTION"],
# function
"noopnum" => ["FUNCTION"],
"in" => ["ELEMENT"],
"out" => ["ELEMENT"],
"async" => ["FUNCTION"],
# pointer
"ref" => ["ELEMENT"],
"ptr" => ["ELEMENT"],
"unique" => ["ELEMENT"],
"ignore" => ["ELEMENT"],
"relative" => ["ELEMENT"],
"null_is_ffffffff" => ["ELEMENT"],
"relative_base" => ["TYPEDEF", "STRUCT", "UNION"],
"gensize" => ["TYPEDEF", "STRUCT", "UNION"],
"value" => ["ELEMENT"],
"flag" => ["ELEMENT", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
# generic
"public" => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
"nopush" => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
"nopull" => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
"nosize" => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP"],
"noprint" => ["FUNCTION", "TYPEDEF", "STRUCT", "UNION", "ENUM", "BITMAP", "ELEMENT"],
"todo" => ["FUNCTION"],
# union
"switch_is" => ["ELEMENT"],
"switch_type" => ["ELEMENT", "UNION"],
"nodiscriminant" => ["UNION"],
"case" => ["ELEMENT"],
"default" => ["ELEMENT"],
"represent_as" => ["ELEMENT"],
"transmit_as" => ["ELEMENT"],
# subcontext
"subcontext" => ["ELEMENT"],
"subcontext_size" => ["ELEMENT"],
"compression" => ["ELEMENT"],
# enum
"enum8bit" => ["ENUM"],
"enum16bit" => ["ENUM"],
"v1_enum" => ["ENUM"],
# bitmap
"bitmap8bit" => ["BITMAP"],
"bitmap16bit" => ["BITMAP"],
"bitmap32bit" => ["BITMAP"],
"bitmap64bit" => ["BITMAP"],
# array
"range" => ["ELEMENT", "PIPE"],
"size_is" => ["ELEMENT"],
"string" => ["ELEMENT"],
"noheader" => ["ELEMENT"],
"charset" => ["ELEMENT"],
"length_is" => ["ELEMENT"],
);
#####################################################################
# check for unknown properties
sub ValidProperties($$)
{
my ($e,$t) = @_;
return unless defined $e->{PROPERTIES};
foreach my $key (keys %{$e->{PROPERTIES}}) {
warning($e, el_name($e) . ": unknown property '$key'")
unless defined($property_list{$key});
fatal($e, el_name($e) . ": property '$key' not allowed on '$t'")
unless grep(/^$t$/, @{$property_list{$key}});
}
}
sub mapToScalar($)
{
sub mapToScalar($);
my $t = shift;
return $t->{NAME} if (ref($t) eq "HASH" and $t->{TYPE} eq "SCALAR");
my $ti = getType($t);
if (not defined ($ti)) {
return undef;
} elsif ($ti->{TYPE} eq "TYPEDEF") {
return mapToScalar($ti->{DATA});
} elsif ($ti->{TYPE} eq "ENUM") {
return Parse::Pidl::Typelist::enum_type_fn($ti);
} elsif ($ti->{TYPE} eq "BITMAP") {
return Parse::Pidl::Typelist::bitmap_type_fn($ti);
}
return undef;
}
#####################################################################
# validate an element
sub ValidElement($)
{
my $e = shift;
ValidProperties($e,"ELEMENT");
# Check whether switches are used correctly.
if (my $switch = has_property($e, "switch_is")) {
my $e2 = find_sibling($e, $switch);
my $type = getType($e->{TYPE});
if (defined($type) and $type->{DATA}->{TYPE} ne "UNION") {
fatal($e, el_name($e) . ": switch_is() used on non-union type $e->{TYPE} which is a $type->{DATA}->{TYPE}");
}
if (not has_property($type->{DATA}, "nodiscriminant") and defined($e2)) {
my $discriminator_type = has_property($type->{DATA}, "switch_type");
$discriminator_type = "uint32" unless defined ($discriminator_type);
my $t1 = mapToScalar($discriminator_type);
if (not defined($t1)) {
fatal($e, el_name($e) . ": unable to map discriminator type '$discriminator_type' to scalar");
}
my $t2 = mapToScalar($e2->{TYPE});
if (not defined($t2)) {
fatal($e, el_name($e) . ": unable to map variable used for switch_is() to scalar");
}
if ($t1 ne $t2) {
warning($e, el_name($e) . ": switch_is() is of type $e2->{TYPE} ($t2), while discriminator type for union $type->{NAME} is $discriminator_type ($t1)");
}
}
}
if (has_property($e, "subcontext") and has_property($e, "represent_as")) {
fatal($e, el_name($e) . " : subcontext() and represent_as() can not be used on the same element");
}
if (has_property($e, "subcontext") and has_property($e, "transmit_as")) {
fatal($e, el_name($e) . " : subcontext() and transmit_as() can not be used on the same element");
}
if (has_property($e, "represent_as") and has_property($e, "transmit_as")) {
fatal($e, el_name($e) . " : represent_as() and transmit_as() can not be used on the same element");
}
if (has_property($e, "represent_as") and has_property($e, "value")) {
fatal($e, el_name($e) . " : represent_as() and value() can not be used on the same element");
}
if (has_property($e, "subcontext")) {
warning($e, "subcontext() is deprecated. Use represent_as() or transmit_as() instead");
}
if (defined (has_property($e, "subcontext_size")) and not defined(has_property($e, "subcontext"))) {
fatal($e, el_name($e) . " : subcontext_size() on non-subcontext element");
}
if (defined (has_property($e, "compression")) and not defined(has_property($e, "subcontext"))) {
fatal($e, el_name($e) . " : compression() on non-subcontext element");
}
if (!$e->{POINTERS} && (
has_property($e, "ptr") or
has_property($e, "unique") or
has_property($e, "relative") or
has_property($e, "ref"))) {
fatal($e, el_name($e) . " : pointer properties on non-pointer element\n");
}
}
#####################################################################
# validate an enum
sub ValidEnum($)
{
my ($enum) = @_;
ValidProperties($enum, "ENUM");
}
#####################################################################
# validate a bitmap
sub ValidBitmap($)
{
my ($bitmap) = @_;
ValidProperties($bitmap, "BITMAP");
}
#####################################################################
# validate a struct
sub ValidStruct($)
{
my($struct) = shift;
ValidProperties($struct, "STRUCT");
return unless defined($struct->{ELEMENTS});
foreach my $e (@{$struct->{ELEMENTS}}) {
$e->{PARENT} = $struct;
ValidElement($e);
}
}
#####################################################################
# parse a union
sub ValidUnion($)
{
my($union) = shift;
ValidProperties($union,"UNION");
if (has_property($union->{PARENT}, "nodiscriminant") and
has_property($union->{PARENT}, "switch_type")) {
fatal($union->{PARENT}, $union->{PARENT}->{NAME} . ": switch_type(" . $union->{PARENT}->{PROPERTIES}->{switch_type} . ") on union without discriminant");
}
return unless defined($union->{ELEMENTS});
foreach my $e (@{$union->{ELEMENTS}}) {
$e->{PARENT} = $union;
if (defined($e->{PROPERTIES}->{default}) and
defined($e->{PROPERTIES}->{case})) {
fatal($e, "Union member $e->{NAME} can not have both default and case properties!");
}
unless (defined ($e->{PROPERTIES}->{default}) or
defined ($e->{PROPERTIES}->{case})) {
fatal($e, "Union member $e->{NAME} must have default or case property");
}
if (has_property($e, "ref")) {
fatal($e, el_name($e) . ": embedded ref pointers are not supported yet\n");
}
ValidElement($e);
}
}
#####################################################################
# validate a pipe
sub ValidPipe($)
{
my ($pipe) = @_;
my $data = $pipe->{DATA};
ValidProperties($pipe, "PIPE");
fatal($pipe, $pipe->{NAME} . ": 'pipe' is not yet supported by pidl");
}
#####################################################################
# parse a typedef
sub ValidTypedef($)
{
my($typedef) = shift;
my $data = $typedef->{DATA};
ValidProperties($typedef, "TYPEDEF");
$data->{PARENT} = $typedef;
$data->{FILE} = $typedef->{FILE} unless defined($data->{FILE});
$data->{LINE} = $typedef->{LINE} unless defined($data->{LINE});
ValidType($data) if (ref($data) eq "HASH");
}
#####################################################################
# validate a function
sub ValidFunction($)
{
my($fn) = shift;
ValidProperties($fn,"FUNCTION");
foreach my $e (@{$fn->{ELEMENTS}}) {
$e->{PARENT} = $fn;
if (has_property($e, "ref") && !$e->{POINTERS}) {
fatal($e, "[ref] variables must be pointers ($fn->{NAME}/$e->{NAME})");
}
ValidElement($e);
}
}
#####################################################################
# validate a type
sub ValidType($)
{
my ($t) = @_;
{
TYPEDEF => \&ValidTypedef,
STRUCT => \&ValidStruct,
UNION => \&ValidUnion,
ENUM => \&ValidEnum,
BITMAP => \&ValidBitmap,
PIPE => \&ValidPipe
}->{$t->{TYPE}}->($t);
}
#####################################################################
# parse the interface definitions
sub ValidInterface($)
{
my($interface) = shift;
my($data) = $interface->{DATA};
if (has_property($interface, "helper")) {
warning($interface, "helper() is pidl-specific and deprecated. Use `include' instead");
}
ValidProperties($interface,"INTERFACE");
if (has_property($interface, "pointer_default")) {
if (not grep (/$interface->{PROPERTIES}->{pointer_default}/,
("ref", "unique", "ptr"))) {
fatal($interface, "Unknown default pointer type `$interface->{PROPERTIES}->{pointer_default}'");
}
}
if (has_property($interface, "object")) {
if (has_property($interface, "version") &&
$interface->{PROPERTIES}->{version} != 0) {
fatal($interface, "Object interfaces must have version 0.0 ($interface->{NAME})");
}
if (!defined($interface->{BASE}) &&
not ($interface->{NAME} eq "IUnknown")) {
fatal($interface, "Object interfaces must all derive from IUnknown ($interface->{NAME})");
}
}
foreach my $d (@{$data}) {
($d->{TYPE} eq "FUNCTION") && ValidFunction($d);
($d->{TYPE} eq "TYPEDEF" or
$d->{TYPE} eq "STRUCT" or
$d->{TYPE} eq "UNION" or
$d->{TYPE} eq "ENUM" or
$d->{TYPE} eq "BITMAP" or
$d->{TYPE} eq "PIPE") && ValidType($d);
}
}
#####################################################################
# Validate an IDL structure
sub Validate($)
{
my($idl) = shift;
foreach my $x (@{$idl}) {
($x->{TYPE} eq "INTERFACE") &&
ValidInterface($x);
($x->{TYPE} eq "IMPORTLIB") &&
fatal($x, "importlib() not supported");
}
}
sub is_charset_array($$)
{
my ($e,$l) = @_;
return 0 if ($l->{TYPE} ne "ARRAY");
my $nl = GetNextLevel($e,$l);
return 0 unless ($nl->{TYPE} eq "DATA");
return has_property($e, "charset");
}
1;
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