summaryrefslogtreecommitdiff
path: root/source4/build/pidl/util.pm
blob: bb5de2a8eded7caec0f782eebed18d0a2795bcda (plain)
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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
###################################################
# utility functions to support pidl
# Copyright tridge@samba.org 2000
# released under the GNU GPL
package util;

#####################################################################
# load a data structure from a file (as saved with SaveStructure)
sub LoadStructure($)
{
	my $f = shift;
	my $contents = FileLoad($f);
	defined $contents || return undef;
	return eval "$contents";
}

use strict;

#####################################################################
# flatten an array of arrays into a single array
sub FlattenArray2($) 
{ 
    my $a = shift;
    my @b;
    for my $d (@{$a}) {
	for my $d1 (@{$d}) {
	    push(@b, $d1);
	}
    }
    return \@b;
}

#####################################################################
# flatten an array of arrays into a single array
sub FlattenArray($) 
{ 
    my $a = shift;
    my @b;
    for my $d (@{$a}) {
	for my $d1 (@{$d}) {
	    push(@b, $d1);
	}
    }
    return \@b;
}

#####################################################################
# flatten an array of hashes into a single hash
sub FlattenHash($) 
{ 
    my $a = shift;
    my %b;
    for my $d (@{$a}) {
	for my $k (keys %{$d}) {
	    $b{$k} = $d->{$k};
	}
    }
    return \%b;
}


#####################################################################
# traverse a perl data structure removing any empty arrays or
# hashes and any hash elements that map to undef
sub CleanData($)
{
    sub CleanData($);
    my($v) = shift;
    if (ref($v) eq "ARRAY") {
	foreach my $i (0 .. $#{$v}) {
	    CleanData($v->[$i]);
	    if (ref($v->[$i]) eq "ARRAY" && $#{$v->[$i]}==-1) { 
		    $v->[$i] = undef; 
		    next; 
	    }
	}
	# this removes any undefined elements from the array
	@{$v} = grep { defined $_ } @{$v};
    } elsif (ref($v) eq "HASH") {
	foreach my $x (keys %{$v}) {
	    CleanData($v->{$x});
	    if (!defined $v->{$x}) { delete($v->{$x}); next; }
	    if (ref($v->{$x}) eq "ARRAY" && $#{$v->{$x}}==-1) { delete($v->{$x}); next; }
	}
    }
}


#####################################################################
# return the modification time of a file
sub FileModtime($)
{
    my($filename) = shift;
    return (stat($filename))[9];
}


#####################################################################
# read a file into a string
sub FileLoad($)
{
    my($filename) = shift;
    local(*INPUTFILE);
    open(INPUTFILE, $filename) || return undef;
    my($saved_delim) = $/;
    undef $/;
    my($data) = <INPUTFILE>;
    close(INPUTFILE);
    $/ = $saved_delim;
    return $data;
}

#####################################################################
# write a string into a file
sub FileSave($$)
{
    my($filename) = shift;
    my($v) = shift;
    local(*FILE);
    open(FILE, ">$filename") || die "can't open $filename";    
    print FILE $v;
    close(FILE);
}

#####################################################################
# return a filename with a changed extension
sub ChangeExtension($$)
{
    my($fname) = shift;
    my($ext) = shift;
    if ($fname =~ /^(.*)\.(.*?)$/) {
	return "$1$ext";
    }
    return "$fname$ext";
}

#####################################################################
# a dumper wrapper to prevent dependence on the Data::Dumper module
# unless we actually need it
sub MyDumper($)
{
	require Data::Dumper;
	my $s = shift;
	return Data::Dumper::Dumper($s);
}

#####################################################################
# save a data structure into a file
sub SaveStructure($$)
{
	my($filename) = shift;
	my($v) = shift;
	FileSave($filename, MyDumper($v));
}

#####################################################################
# find an interface in an array of interfaces
sub get_interface($$)
{
	my($if) = shift;
	my($n) = shift;

	foreach(@{$if}) {
		if($_->{NAME} eq $n) { return $_; }
	}
	
	return 0;
}

#####################################################################
# see if a pidl property list contains a give property
sub has_property($$)
{
	my($e) = shift;
	my($p) = shift;

	if (!defined $e->{PROPERTIES}) {
		return undef;
	}

	return $e->{PROPERTIES}->{$p};
}

#####################################################################
# see if a pidl property matches a value
sub property_matches($$$)
{
	my($e) = shift;
	my($p) = shift;
	my($v) = shift;

	if (!defined has_property($e, $p)) {
		return undef;
	}

	if ($e->{PROPERTIES}->{$p} =~ /$v/) {
		return 1;
	}

	return undef;
}

my %enum_list;

sub register_enum($$)
{
	my $enum = shift;
	my $name = shift;
	$enum_list{$name} = $enum;
}

sub is_enum($)
{
	my $name = shift;
	return defined $enum_list{$name}
}

sub get_enum($)
{
	my $name = shift;
	return $enum_list{$name};
}

sub enum_type_decl($)
{
	my $enum = shift;
	return "enum $enum->{TYPE}";
}

sub enum_type_fn($)
{
	my $enum = shift;
	if (util::has_property($enum->{PARENT}, "enum8bit")) {
		return "uint8";
	} elsif (util::has_property($enum->{PARENT}, "v1_enum")) {
		return "uint32";
	}
	return "uint16";
}

my %bitmap_list;

sub register_bitmap($$)
{
	my $bitmap = shift;
	my $name = shift;
	$bitmap_list{$name} = $bitmap;
}

sub is_bitmap($)
{
	my $name = shift;
	return defined $bitmap_list{$name};
}

sub get_bitmap($)
{
	my $name = shift;
	return $bitmap_list{$name};
}

sub bitmap_type_fn($)
{
	my $bitmap = shift;

	if (util::has_property($bitmap->{PARENT}, "bitmap8bit")) {
		return "uint8";
	} elsif (util::has_property($bitmap->{PARENT}, "bitmap16bit")) {
		return "uint16";
	} elsif (util::has_property($bitmap->{PARENT}, "bitmap64bit")) {
		return "uint64";
	}
	return "uint32";
}

sub bitmap_type_decl($)
{
	my $bitmap = shift;
	return map_type(bitmap_type_fn($bitmap));
}


my %type_alignments = 
    (
     "char"           => 1,
     "int8"           => 1,
     "uint8"          => 1,
     "short"          => 2,
     "wchar_t"        => 2,
     "int16"          => 2,
     "uint16"         => 2,
     "long"           => 4,
     "int32"          => 4,
     "uint32"         => 4,
     "dlong"          => 4,
     "udlong"         => 4,
     "NTTIME"         => 4,
     "NTTIME_1sec"    => 4,
     "time_t"         => 4,
     "DATA_BLOB"      => 4,
     "error_status_t" => 4,
     "WERROR"         => 4,
     "boolean32"      => 4,
     "unsigned32"     => 4,
     "ipv4address"    => 4,
     "hyper"          => 8,
     "NTTIME_hyper"   => 8
     );

sub is_scalar_type($)
{
    my $type = shift;

    if (defined $type_alignments{$type}) {
	    return 1;
    }
    if (is_enum($type)) {
	    return 1;
    }
    if (is_bitmap($type)) {
	    return 1;
    }

    return 0;
}

# return the NDR alignment for a type
sub type_align($)
{
    my($e) = shift;
    my $type = $e->{TYPE};

    if (need_wire_pointer($e)) {
	    return 4;
    }

    if (is_enum($type)) {
	    $type = enum_type_fn(get_enum($type));
    }

    if (my $ret = $type_alignments{$type}) {
	    return $ret;
    }

    # it must be an external type - all we can do is guess 
    return 4;
}

# determine if an element needs a reference pointer on the wire
# in its NDR representation
sub need_wire_pointer($)
{
	my $e = shift;
	if ($e->{POINTERS} && 
	    !has_property($e, "ref")) {
		return $e->{POINTERS};
	}
	return undef;
}

# determine if an element is a pass-by-reference structure
sub is_ref_struct($)
{
	my $e = shift;
	if (!is_scalar_type($e->{TYPE}) &&
	    has_property($e, "ref")) {
		return 1;
	}
	return 0;
}

# determine if an element is a pure scalar. pure scalars do not
# have a "buffers" section in NDR
sub is_pure_scalar($)
{
	my $e = shift;
	if (has_property($e, "ref")) {
		return 1;
	}
	if (is_scalar_type($e->{TYPE}) && 
	    !$e->{POINTERS} && 
	    !array_size($e)) {
		return 1;
	}
	return 0;
}

# determine the array size (size_is() or ARRAY_LEN)
sub array_size($)
{
	my $e = shift;
	my $size = has_property($e, "size_is");
	if ($size) {
		return $size;
	}
	$size = $e->{ARRAY_LEN};
	if ($size) {
		return $size;
	}
	return undef;
}

# see if a variable needs to be allocated by the NDR subsystem on pull
sub need_alloc($)
{
	my $e = shift;

	if (has_property($e, "ref")) {
		return 0;
	}

	if ($e->{POINTERS} || array_size($e)) {
		return 1;
	}

	return 0;
}

# determine the C prefix used to refer to a variable when passing to a push
# function. This will be '*' for pointers to scalar types, '' for scalar
# types and normal pointers and '&' for pass-by-reference structures
sub c_push_prefix($)
{
	my $e = shift;

	if ($e->{TYPE} =~ "string") {
		return "";
	}

	if (is_scalar_type($e->{TYPE}) &&
	    $e->{POINTERS}) {
		return "*";
	}
	if (!is_scalar_type($e->{TYPE}) &&
	    !$e->{POINTERS} &&
	    !array_size($e)) {
		return "&";
	}
	return "";
}


# determine the C prefix used to refer to a variable when passing to a pull
# return '&' or ''
sub c_pull_prefix($)
{
	my $e = shift;

	if (!$e->{POINTERS} && !array_size($e)) {
		return "&";
	}

	if ($e->{TYPE} =~ "string") {
		return "&";
	}

	return "";
}

# determine if an element has a direct buffers component
sub has_direct_buffers($)
{
	my $e = shift;
	if ($e->{POINTERS} || array_size($e)) {
		return 1;
	}
	return 0;
}

# return 1 if the string is a C constant
sub is_constant($)
{
	my $s = shift;
	if (defined $s && $s =~ /^\d/) {
		return 1;
	}
	return 0;
}

# return 1 if this is a fixed array
sub is_fixed_array($)
{
	my $e = shift;
	my $len = $e->{"ARRAY_LEN"};
	if (defined $len && is_constant($len)) {
		return 1;
	}
	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 a "" quoted string, unless already quoted
sub make_str($)
{
	my $str = shift;
	if (substr($str, 0, 1) eq "\"") {
		return $str;
	}
	return "\"" . $str . "\"";
}


# provide mappings between IDL base types and types in our headers
my %type_mappings = 
    (
     "int8"         => "int8_t",
     "uint8"        => "uint8_t",
     "short"        => "int16_t",
     "wchar_t"      => "uint16_t",
     "int16"        => "int16_t",
     "uint16"       => "uint16_t",
     "int32"        => "int32_t",
     "uint32"       => "uint32_t",
     "int64"        => "int64_t",
     "uint64"       => "uint64_t",
     "dlong"        => "int64_t",
     "udlong"       => "uint64_t",
     "hyper"        => "uint64_t",
     "NTTIME_1sec"  => "NTTIME",
     "NTTIME_hyper" => "NTTIME",
     "ipv4address"  => "const char *"
     );

# map from a IDL type to a C header type
sub map_type($)
{
	my $name = shift;
	if (my $ret = $type_mappings{$name}) {
		return $ret;
	}
	return $name;
}

1;