1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
###################################################
# Samba4 NDR info tree generator
# Copyright tridge@samba.org 2000-2003
# Copyright tpot@samba.org 2001
# Copyright jelmer@samba.org 2004-2005
# released under the GNU GPL
package Ndr;
use strict;
#####################################################################
# return a table describing the order in which the parts of an element
# should be parsed
sub GetElementLevelTable($)
{
my $e = shift;
return ($e->{NDR_ORDER_TABLE}) if (defined $e->{NDR_ORDER_TABLE});
my $order = [];
my $is_deferred = 0;
# First, all the pointers
foreach my $i (1..need_wire_pointer($e)) {
push (@$order, {
TYPE => "POINTER",
# for now, there can only be one pointer type per element
POINTER_TYPE => pointer_type($e),
IS_DEFERRED => "$is_deferred"
});
# everything that follows will be deferred
$is_deferred = 1;
}
if (defined($e->{ARRAY_LEN})) {
push (@$order, {
TYPE => "ARRAY",
ARRAY_TYPE => array_type($e),
SIZE_IS => util::has_property($e, "size_is"),
LENGTH_IS => util::has_property($e, "length_is"),
IS_DEFERRED => "$is_deferred"
});
}
if (my $sub_size = util::has_property($e, "subcontext")) {
push (@$order, {
TYPE => "SUBCONTEXT",
SUBCONTEXT_SIZE => $sub_size,
IS_DEFERRED => $is_deferred
});
}
if (my $switch = util::has_property($e, "switch_is")) {
push (@$order, {
TYPE => "SWITCH",
SWITCH_IS => $switch,
IS_DEFERRED => $is_deferred
});
}
push (@$order, {
TYPE => "DATA",
NAME => $e->{NAME},
IS_DEFERRED => $is_deferred,
CONTAINS_DEFERRED => can_contain_deferred($e)
});
$e->{NDR_ORDER_TABLE} = $order;
return $order;
}
#####################################################################
# see if a type contains any deferred data
sub can_contain_deferred
{
my $e = shift;
return 1 if ($e->{POINTERS});
return 0 if (is_scalar_type($e->{TYPE}));
return 0 if (util::has_property($e, "subcontext"));
return 1 unless (typelist::hasType($e->{TYPE})); # assume the worst
my $type = typelist::getType($e->{TYPE});
foreach my $x (@{$type->{DATA}->{ELEMENTS}}) {
return 1 if (can_contain_deferred ($x));
}
return 0;
}
sub is_scalar_type($)
{
my $type = shift;
return 0 unless typelist::hasType($type);
if (my $dt = typelist::getType($type)->{DATA}->{TYPE}) {
return 1 if ($dt eq "SCALAR" or $dt eq "ENUM" or $dt eq "BITMAP");
}
return 0;
}
sub pointer_type($)
{
my $e = shift;
return undef unless $e->{POINTERS};
return "ref" if (util::has_property($e, "ref"));
return "ptr" if (util::has_property($e, "ptr"));
return "unique" if (util::has_property($e, "unique"));
return "relative" if (util::has_property($e, "relative"));
return "ignore" if (util::has_property($e, "ignore"));
return undef;
}
# return 1 if this is a fixed array
sub is_fixed_array($)
{
my $e = shift;
my $len = $e->{"ARRAY_LEN"};
return 1 if (defined $len && util::is_constant($len));
return 0;
}
# return 1 if this is a conformant array
sub is_conformant_array($)
{
my $e = shift;
return 1 if (util::has_property($e, "size_is"));
return 0;
}
# return 1 if this is a inline array
sub is_inline_array($)
{
my $e = shift;
my $len = $e->{"ARRAY_LEN"};
if (is_fixed_array($e) ||
defined $len && $len ne "*") {
return 1;
}
return 0;
}
# return 1 if this is a varying array
sub is_varying_array($)
{
my $e = shift;
return util::has_property($e, "length_is");
}
# return 1 if this is a surrounding array (sometimes
# referred to as an embedded array). Can only occur as
# the last element in a struct and can not contain any pointers.
sub is_surrounding_array($)
{
my $e = shift;
return ($e->{POINTERS} == 0
and defined $e->{ARRAY_LEN}
and $e->{ARRAY_LEN} eq "*"
and $e == $e->{PARENT}->{ELEMENTS}[-1]
and $e->{PARENT}->{TYPE} ne "FUNCTION");
}
sub array_type($)
{
my $e = shift;
return "conformant-varying" if (is_varying_array($e) and is_conformant_array($e));
return "conformant" if (is_varying_array($e));
return "varying" if (is_varying_array($e));
return "inline" if (is_inline_array($e));
return "fixed" if (is_fixed_array($e));
return undef;
}
# determine if an element needs a reference pointer on the wire
# in its NDR representation
sub need_wire_pointer($)
{
my $e = shift;
my $n = $e->{POINTERS};
my $pt = pointer_type($e);
# Top level "ref" pointers do not have a referrent identifier
if ( defined($pt)
and $pt eq "ref"
and $e->{PARENT}->{TYPE} eq "FUNCTION")
{
$n--;
}
return $n;
}
1;
|
