forked from protobufjs/protobuf.js
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ProtoBuf.js
3767 lines (3497 loc) · 170 KB
/
ProtoBuf.js
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
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
Copyright 2013 Daniel Wirtz <dcode@dcode.io>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @license ProtoBuf.js (c) 2013 Daniel Wirtz <dcode@dcode.io>
* Released under the Apache License, Version 2.0
* see: https://github.com/dcodeIO/ProtoBuf.js for details
*/
(function(global) {
"use strict";
function loadProtoBuf(ByteBuffer) {
/**
* The ProtoBuf namespace.
* @exports ProtoBuf
* @namespace
* @expose
*/
var ProtoBuf = {};
/**
* ProtoBuf.js version.
* @type {string}
* @const
* @expose
*/
ProtoBuf.VERSION = "2.0.5";
/**
* Wire types.
* @type {Object.<string,number>}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES = {};
/**
* Varint wire type.
* @type {number}
* @expose
*/
ProtoBuf.WIRE_TYPES.VARINT = 0;
/**
* Fixed 64 bits wire type.
* @type {number}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES.BITS64 = 1;
/**
* Length delimited wire type.
* @type {number}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES.LDELIM = 2;
/**
* Start group wire type.
* @type {number}
* @const
* @deprecated Not supported.
* @expose
*/
ProtoBuf.WIRE_TYPES.STARTGROUP = 3;
/**
* End group wire type.
* @type {number}
* @const
* @deprecated Not supported.
* @expose
*/
ProtoBuf.WIRE_TYPES.ENDGROUP = 4;
/**
* Fixed 32 bits wire type.
* @type {number}
* @const
* @expose
*/
ProtoBuf.WIRE_TYPES.BITS32 = 5;
/**
* Types.
* @dict
* @type {Object.<string,{name: string, wireType: number}>}
* @const
* @expose
*/
ProtoBuf.TYPES = {
// According to the protobuf spec.
"int32": {
name: "int32",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"uint32": {
name: "uint32",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"sint32": {
name: "sint32",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"int64": {
name: "int64",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"uint64": {
name: "uint64",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"sint64": {
name: "sint64",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"bool": {
name: "bool",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"double": {
name: "double",
wireType: ProtoBuf.WIRE_TYPES.BITS64
},
"string": {
name: "string",
wireType: ProtoBuf.WIRE_TYPES.LDELIM
},
"bytes": {
name: "bytes",
wireType: ProtoBuf.WIRE_TYPES.LDELIM
},
"fixed32": {
name: "fixed32",
wireType: ProtoBuf.WIRE_TYPES.BITS32
},
"sfixed32": {
name: "sfixed32",
wireType: ProtoBuf.WIRE_TYPES.BITS32
},
"fixed64": {
name: "fixed64",
wireType: ProtoBuf.WIRE_TYPES.BITS64
},
"sfixed64": {
name: "sfixed64",
wireType: ProtoBuf.WIRE_TYPES.BITS64
},
"float": {
name: "float",
wireType: ProtoBuf.WIRE_TYPES.BITS32
},
"enum": {
name: "enum",
wireType: ProtoBuf.WIRE_TYPES.VARINT
},
"message": {
name: "message",
wireType: ProtoBuf.WIRE_TYPES.LDELIM
}
};
/**
* @type {?Long}
*/
ProtoBuf.Long = ByteBuffer.Long;
/**
* If set to `true`, field names will be converted from underscore notation to camel case. Defaults to `false`.
* Must be set prior to parsing.
* @type {boolean}
* @expose
*/
ProtoBuf.convertFieldsToCamelCase = false;
/**
* @alias ProtoBuf.Util
* @expose
*/
ProtoBuf.Util = (function() {
"use strict";
// Object.create polyfill
// ref: https://developer.mozilla.org/de/docs/JavaScript/Reference/Global_Objects/Object/create
if (!Object.create) {
/** @expose */
Object.create = function (o) {
if (arguments.length > 1) {
throw new Error('Object.create implementation only accepts the first parameter.');
}
function F() {}
F.prototype = o;
return new F();
};
}
/**
* ProtoBuf utilities.
* @exports ProtoBuf.Util
* @namespace
*/
var Util = {};
/**
* Flag if running in node or not.
* @type {boolean}
* @const
* @expose
*/
Util.IS_NODE = (typeof window === 'undefined' || !window.window) && typeof require === 'function' && typeof process !== 'undefined' && typeof process["nextTick"] === 'function';
/**
* Constructs a XMLHttpRequest object.
* @return {XMLHttpRequest}
* @throws {Error} If XMLHttpRequest is not supported
* @expose
*/
Util.XHR = function() {
// No dependencies please, ref: http://www.quirksmode.org/js/xmlhttp.html
var XMLHttpFactories = [
function () {return new XMLHttpRequest()},
function () {return new ActiveXObject("Msxml2.XMLHTTP")},
function () {return new ActiveXObject("Msxml3.XMLHTTP")},
function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];
/** @type {?XMLHttpRequest} */
var xhr = null;
for (var i=0;i<XMLHttpFactories.length;i++) {
try { xhr = XMLHttpFactories[i](); }
catch (e) { continue; }
break;
}
if (!xhr) throw(new Error("XMLHttpRequest is not supported"));
return xhr;
};
/**
* Fetches a resource.
* @param {string} path Resource path
* @param {function(?string)=} callback Callback receiving the resource's contents. If omitted the resource will
* be fetched synchronously. If the request failed, contents will be null.
* @return {?string|undefined} Resource contents if callback is omitted (null if the request failed), else undefined.
* @expose
*/
Util.fetch = function(path, callback) {
if (callback && typeof callback != 'function') callback = null;
if (Util.IS_NODE) {
if (callback) {
require("fs").readFile(path, function(err, data) {
if (err) {
callback(null);
}
else callback(""+data);
});
} else {
try {
return require("fs").readFileSync(path);
} catch (e) {
return null;
}
}
} else {
var xhr = Util.XHR();
xhr.open('GET', path, callback ? true : false);
// xhr.setRequestHeader('User-Agent', 'XMLHTTP/1.0');
xhr.setRequestHeader('Accept', 'text/plain');
if (typeof xhr.overrideMimeType === 'function') xhr.overrideMimeType('text/plain');
if (callback) {
xhr.onreadystatechange = function() {
if (xhr.readyState != 4) return;
if (/* remote */ xhr.status == 200 || /* local */ (xhr.status == 0 && typeof xhr.responseText === 'string')) {
callback(xhr.responseText);
} else {
callback(null);
}
};
if (xhr.readyState == 4) return;
xhr.send(null);
} else {
xhr.send(null);
if (/* remote */ xhr.status == 200 || /* local */ (xhr.status == 0 && typeof xhr.responseText === 'string')) {
return xhr.responseText;
}
return null;
}
}
};
/**
* Tests if an object is an array.
* @param {*} obj Object to test
* @returns {boolean} true if it is an array, else false
* @expose
*/
Util.isArray = function(obj) {
if (!obj) return false;
if (obj instanceof Array) return true;
if (Array.isArray) return Array.isArray(obj);
return Object.prototype.toString.call(obj) === "[object Array]";
};
return Util;
})();
/**
* @alias ProtoBuf.Lang
* @expose
*/
ProtoBuf.Lang = (function() {
"use strict";
/**
* ProtoBuf Language.
* @exports ProtoBuf.Lang
* @type {Object.<string,string|RegExp>}
* @namespace
* @expose
*/
var Lang = { // Look, so cute!
OPEN: "{",
CLOSE: "}",
OPTOPEN: "[",
OPTCLOSE: "]",
OPTEND: ",",
EQUAL: "=",
END: ";",
STRINGOPEN: '"',
STRINGCLOSE: '"',
COPTOPEN: '(',
COPTCLOSE: ')',
DELIM: /[\s\{\}=;\[\],"\(\)]/g,
KEYWORD: /^(?:package|option|import|message|enum|extend|service|syntax|extensions)$/,
RULE: /^(?:required|optional|repeated)$/,
TYPE: /^(?:double|float|int32|uint32|sint32|int64|uint64|sint64|fixed32|sfixed32|fixed64|sfixed64|bool|string|bytes)$/,
NAME: /^[a-zA-Z][a-zA-Z_0-9]*$/,
OPTNAME: /^(?:[a-zA-Z][a-zA-Z_0-9]*|\([a-zA-Z][a-zA-Z_0-9]*\))$/,
TYPEDEF: /^[a-zA-Z][a-zA-Z_0-9]*$/,
TYPEREF: /^(?:\.?[a-zA-Z][a-zA-Z_0-9]*)+$/,
FQTYPEREF: /^(?:\.[a-zA-Z][a-zA-Z_0-9]*)+$/,
NUMBER: /^-?(?:[1-9][0-9]*|0|0x[0-9a-fA-F]+|0[0-7]+|[0-9]*\.[0-9]+)$/,
NUMBER_DEC: /^(?:[1-9][0-9]*|0)$/,
NUMBER_HEX: /^0x[0-9a-fA-F]+$/,
NUMBER_OCT: /^0[0-7]+$/,
NUMBER_FLT: /^[0-9]*\.[0-9]+$/,
ID: /^(?:[1-9][0-9]*|0|0x[0-9a-fA-F]+|0[0-7]+)$/,
NEGID: /^\-?(?:[1-9][0-9]*|0|0x[0-9a-fA-F]+|0[0-7]+)$/,
WHITESPACE: /\s/,
STRING: /"([^"\\]*(\\.[^"\\]*)*)"/g,
BOOL: /^(?:true|false)$/i,
ID_MIN: 1,
ID_MAX: 0x1FFFFFFF
};
return Lang;
})();
/**
* Utilities to parse .proto files.
* @namespace
* @expose
*/
ProtoBuf.DotProto = {}; // Not present in "noparse" builds
/**
* @alias ProtoBuf.DotProto.Tokenizer
* @expose
*/
ProtoBuf.DotProto.Tokenizer = (function(Lang) {
/**
* Constructs a new Tokenizer.
* @exports ProtoBuf.DotProto.Tokenizer
* @class A ProtoBuf .proto Tokenizer.
* @param {string} proto Proto to tokenize
* @constructor
*/
var Tokenizer = function(proto) {
/**
* Source to parse.
* @type {string}
* @expose
*/
this.source = ""+proto;
/**
* Current index.
* @type {number}
* @expose
*/
this.index = 0;
/**
* Current line.
* @type {number}
* @expose
*/
this.line = 1;
/**
* Stacked values.
* @type {Array}
* @expose
*/
this.stack = [];
/**
* Whether currently reading a string or not.
* @type {boolean}
* @expose
*/
this.readingString = false;
};
/**
* Reads a string beginning at the current index.
* @return {string} The string
* @throws {Error} If it's not a valid string
* @private
*/
Tokenizer.prototype._readString = function() {
Lang.STRING.lastIndex = this.index-1; // Include the open quote
var match;
if ((match = Lang.STRING.exec(this.source)) !== null) {
var s = match[1];
this.index = Lang.STRING.lastIndex;
this.stack.push(Lang.STRINGCLOSE);
return s;
}
throw(new Error("Illegal string value at line "+this.line+", index "+this.index));
};
/**
* Gets the next token and advances by one.
* @return {?string} Token or `null` on EOF
* @throws {Error} If it's not a valid proto file
* @expose
*/
Tokenizer.prototype.next = function() {
if (this.stack.length > 0) {
return this.stack.shift();
}
if (this.index >= this.source.length) {
return null; // No more tokens
}
if (this.readingString) {
this.readingString = false;
return this._readString();
}
var repeat, last;
do {
repeat = false;
// Strip white spaces
while (Lang.WHITESPACE.test(last = this.source.charAt(this.index))) {
this.index++;
if (last === "\n") this.line++;
if (this.index === this.source.length) return null;
}
// Strip comments
if (this.source.charAt(this.index) === '/') {
if (this.source.charAt(++this.index) === '/') { // Single line
while (this.source.charAt(this.index) !== "\n") {
this.index++;
if (this.index == this.source.length) return null;
}
this.index++;
this.line++;
repeat = true;
} else if (this.source.charAt(this.index) === '*') { /* Block */
last = '';
while (last+(last=this.source.charAt(this.index)) !== '*/') {
this.index++;
if (last === "\n") this.line++;
if (this.index === this.source.length) return null;
}
this.index++;
repeat = true;
} else {
throw(new Error("Invalid comment at line "+this.line+": /"+this.source.charAt(this.index)+" ('/' or '*' expected)"));
}
}
} while (repeat);
if (this.index === this.source.length) return null;
// Read the next token
var end = this.index;
Lang.DELIM.lastIndex = 0;
var delim = Lang.DELIM.test(this.source.charAt(end));
if (!delim) {
end++;
while(end < this.source.length && !Lang.DELIM.test(this.source.charAt(end))) {
end++;
}
} else {
end++;
}
var token = this.source.substring(this.index, this.index = end);
if (token === Lang.STRINGOPEN) {
this.readingString = true;
}
return token;
};
/**
* Peeks for the next token.
* @return {?string} Token or `null` on EOF
* @throws {Error} If it's not a valid proto file
* @expose
*/
Tokenizer.prototype.peek = function() {
if (this.stack.length == 0) {
var token = this.next();
if (token === null) return null;
this.stack.push(token);
}
return this.stack[0];
};
/**
* Returns a string representation of this object.
* @return {string} String representation as of "Tokenizer(index/length)"
* @expose
*/
Tokenizer.prototype.toString = function() {
return "Tokenizer("+this.index+"/"+this.source.length+" at line "+this.line+")";
};
return Tokenizer;
})(ProtoBuf.Lang);
/**
* @alias ProtoBuf.DotProto.Parser
* @expose
*/
ProtoBuf.DotProto.Parser = (function(ProtoBuf, Lang, Tokenizer) {
"use strict";
/**
* Constructs a new Parser.
* @exports ProtoBuf.DotProto.Parser
* @class A ProtoBuf .proto parser.
* @param {string} proto Protocol source
* @constructor
*/
var Parser = function(proto) {
/**
* Tokenizer.
* @type {ProtoBuf.DotProto.Tokenizer}
* @expose
*/
this.tn = new Tokenizer(proto);
};
/**
* Runs the parser.
* @return {{package: string|null, messages: Array.<object>, enums: Array.<object>, imports: Array.<string>, options: object<string,*>}}
* @throws {Error} If the source cannot be parsed
* @expose
*/
Parser.prototype.parse = function() {
var topLevel = {
"name": "[ROOT]", // temporary
"package": null,
"messages": [],
"enums": [],
"imports": [],
"options": {},
"services": []
};
var token, header = true;
do {
token = this.tn.next();
if (token == null) {
break; // No more messages
}
if (token == 'package') {
if (!header) {
throw(new Error("Illegal package definition at line "+this.tn.line+": Must be declared before the first message or enum"));
}
if (topLevel["package"] !== null) {
throw(new Error("Illegal package definition at line "+this.tn.line+": Package already declared"));
}
topLevel["package"] = this._parsePackage(token);
} else if (token == 'import') {
if (!header) {
throw(new Error("Illegal import definition at line "+this.tn.line+": Must be declared before the first message or enum"));
}
topLevel.imports.push(this._parseImport(token));
} else if (token === 'message') {
this._parseMessage(topLevel, token);
header = false;
} else if (token === 'enum') {
this._parseEnum(topLevel, token);
header = false;
} else if (token === 'option') {
if (!header) {
throw(new Error("Illegal option definition at line "+this.tn.line+": Must be declared before the first message or enum"));
}
this._parseOption(topLevel, token);
} else if (token === 'service') {
this._parseService(topLevel, token);
} else if (token === 'extend') {
this._parseExtend(topLevel, token);
} else if (token === 'syntax') {
this._parseIgnoredStatement(topLevel, token);
} else {
throw(new Error("Illegal top level declaration at line "+this.tn.line+": "+token));
}
} while (true);
delete topLevel["name"];
return topLevel;
};
/**
* Parses a number value.
* @param {string} val Number value to parse
* @return {number} Number
* @throws {Error} If the number value is invalid
* @private
*/
Parser.prototype._parseNumber = function(val) {
var sign = 1;
if (val.charAt(0) == '-') {
sign = -1; val = val.substring(1);
}
if (Lang.NUMBER_DEC.test(val)) {
return sign*parseInt(val, 10);
} else if (Lang.NUMBER_HEX.test(val)) {
return sign*parseInt(val.substring(2), 16);
} else if (Lang.NUMBER_OCT.test(val)) {
return sign*parseInt(val.substring(1), 8);
} else if (Lang.NUMBER_FLT.test(val)) {
return sign*parseFloat(val);
}
throw(new Error("Illegal number value at line "+this.tn.line+": "+(sign < 0 ? '-' : '')+val));
};
/**
* Parses an ID value.
* @param {string} val ID value to parse
* @param {boolean=} neg Whether the ID may be negative, defaults to `false`
* @returns {number} ID
* @throws {Error} If the ID value is invalid
* @private
*/
Parser.prototype._parseId = function(val, neg) {
var id = -1;
var sign = 1;
if (val.charAt(0) == '-') {
sign = -1; val = val.substring(1);
}
if (Lang.NUMBER_DEC.test(val)) {
id = parseInt(val);
} else if (Lang.NUMBER_HEX.test(val)) {
id = parseInt(val.substring(2), 16);
} else if (Lang.NUMBER_OCT.test(val)) {
id = parseInt(val.substring(1), 8);
} else {
throw(new Error("Illegal ID value at line "+this.tn.line+": "+(sign < 0 ? '-' : '')+val));
}
id = (sign*id)|0; // Force to 32bit
if (!neg && id < 0) {
throw(new Error("Illegal ID range at line "+this.tn.line+": "+(sign < 0 ? '-' : '')+val));
}
return id;
};
/**
* Parses the package definition.
* @param {string} token Initial token
* @return {string} Package name
* @throws {Error} If the package definition cannot be parsed
* @private
*/
Parser.prototype._parsePackage = function(token) {
token = this.tn.next();
if (!Lang.TYPEREF.test(token)) {
throw(new Error("Illegal package name at line "+this.tn.line+": "+token));
}
var pkg = token;
token = this.tn.next();
if (token != Lang.END) {
throw(new Error("Illegal end of package definition at line "+this.tn.line+": "+token+" ('"+Lang.END+"' expected)"));
}
return pkg;
};
/**
* Parses an import definition.
* @param {string} token Initial token
* @return {string} Import file name
* @throws {Error} If the import definition cannot be parsed
* @private
*/
Parser.prototype._parseImport = function(token) {
token = this.tn.next();
if (token === "public") {
token = this.tn.next();
}
if (token !== Lang.STRINGOPEN) {
throw(new Error("Illegal begin of import value at line "+this.tn.line+": "+token+" ('"+Lang.STRINGOPEN+"' expected)"));
}
var imported = this.tn.next();
token = this.tn.next();
if (token !== Lang.STRINGCLOSE) {
throw(new Error("Illegal end of import value at line "+this.tn.line+": "+token+" ('"+Lang.STRINGCLOSE+"' expected)"));
}
token = this.tn.next();
if (token !== Lang.END) {
throw(new Error("Illegal end of import definition at line "+this.tn.line+": "+token+" ('"+Lang.END+"' expected)"));
}
return imported;
};
/**
* Parses a namespace option.
* @param {Object} parent Parent definition
* @param {string} token Initial token
* @throws {Error} If the option cannot be parsed
* @private
*/
Parser.prototype._parseOption = function(parent, token) {
token = this.tn.next();
var custom = false;
if (token == Lang.COPTOPEN) {
custom = true;
token = this.tn.next();
}
if (!Lang.NAME.test(token)) {
// we can allow options of the form google.protobuf.* since they will just get ignored anyways
if (!/google\.protobuf\./.test(token)) {
throw(new Error("Illegal option name in message "+parent.name+" at line "+this.tn.line+": "+token));
}
}
var name = token;
token = this.tn.next();
if (custom) { // (my_method_option).foo, (my_method_option), some_method_option
if (token !== Lang.COPTCLOSE) {
throw(new Error("Illegal custom option name delimiter in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTCLOSE+"' expected)"));
}
name = '('+name+')';
token = this.tn.next();
if (Lang.FQTYPEREF.test(token)) {
name += token;
token = this.tn.next();
}
}
if (token !== Lang.EQUAL) {
throw(new Error("Illegal option operator in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.EQUAL+"' expected)"));
}
var value;
token = this.tn.next();
if (token === Lang.STRINGOPEN) {
value = this.tn.next();
token = this.tn.next();
if (token !== Lang.STRINGCLOSE) {
throw(new Error("Illegal end of option value in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.STRINGCLOSE+"' expected)"));
}
} else {
if (Lang.NUMBER.test(token)) {
value = this._parseNumber(token, true);
} else if (Lang.TYPEREF.test(token)) {
value = token;
} else {
throw(new Error("Illegal option value in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token));
}
}
token = this.tn.next();
if (token !== Lang.END) {
throw(new Error("Illegal end of option in message "+parent.name+", option "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.END+"' expected)"));
}
parent["options"][name] = value;
};
/**
* Parses an ignored block of the form ['keyword', 'typeref', '{' ... '}'].
* @param {Object} parent Parent definition
* @param {string} keyword Initial token
* @throws {Error} If the directive cannot be parsed
* @private
*/
Parser.prototype._parseIgnoredBlock = function(parent, keyword) {
var token = this.tn.next();
if (!Lang.TYPEREF.test(token)) {
throw(new Error("Illegal "+keyword+" type in "+parent.name+": "+token));
}
var name = token;
token = this.tn.next();
if (token !== Lang.OPEN) {
throw(new Error("Illegal OPEN in "+parent.name+" after "+keyword+" "+name+" at line "+this.tn.line+": "+token));
}
var depth = 1;
do {
token = this.tn.next();
if (token === null) {
throw(new Error("Unexpected EOF in "+parent.name+", "+keyword+" (ignored) at line "+this.tn.line+": "+name));
}
if (token === Lang.OPEN) {
depth++;
} else if (token === Lang.CLOSE) {
token = this.tn.peek();
if (token === Lang.END) this.tn.next();
depth--;
if (depth === 0) {
break;
}
}
} while(true);
};
/**
* Parses an ignored statement of the form ['keyword', ..., ';'].
* @param {Object} parent Parent definition
* @param {string} keyword Initial token
* @throws {Error} If the directive cannot be parsed
* @private
*/
Parser.prototype._parseIgnoredStatement = function(parent, keyword) {
var token;
do {
token = this.tn.next();
if (token === null) {
throw(new Error("Unexpected EOF in "+parent.name+", "+keyword+" (ignored) at line "+this.tn.line));
}
if (token === Lang.END) break;
} while (true);
};
/**
* Parses a service definition.
* @param {Object} parent Parent definition
* @param {string} keyword Initial token
* @throws {Error} If the service cannot be parsed
* @private
*/
Parser.prototype._parseService = function(parent, keyword) {
var token = this.tn.next();
if (!Lang.NAME.test(token)) {
throw(new Error("Illegal service name at line "+this.tn.line+": "+token));
}
var name = token;
var svc = {
"name": name,
"rpc": {},
"options": {}
};
token = this.tn.next();
if (token !== Lang.OPEN) {
throw(new Error("Illegal OPEN after service "+name+" at line "+this.tn.line+": "+token+" ('"+Lang.OPEN+"' expected)"));
}
do {
token = this.tn.next();
if (token === "option") {
this._parseOption(svc, token);
} else if (token === 'rpc') {
this._parseServiceRPC(svc, token);
} else if (token !== Lang.CLOSE) {
throw(new Error("Illegal type for service "+name+" at line "+this.tn.line+": "+token));
}
} while (token !== Lang.CLOSE);
parent["services"].push(svc);
};
/**
* Parses a RPC service definition of the form ['rpc', name, (request), 'returns', (response)].
* @param {Object} svc Parent definition
* @param {string} token Initial token
* @private
*/
Parser.prototype._parseServiceRPC = function(svc, token) {
var type = token;
token = this.tn.next();
if (!Lang.NAME.test(token)) {
throw(new Error("Illegal RPC method name in service "+svc["name"]+" at line "+this.tn.line+": "+token));
}
var name = token;
var method = {
"request": null,
"response": null,
"options": {}
};
token = this.tn.next();
if (token !== Lang.COPTOPEN) {
throw(new Error("Illegal start of request type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTOPEN+"' expected)"));
}
token = this.tn.next();
if (!Lang.TYPEREF.test(token)) {
throw(new Error("Illegal request type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token));
}
method["request"] = token;
token = this.tn.next();
if (token != Lang.COPTCLOSE) {
throw(new Error("Illegal end of request type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTCLOSE+"' expected)"))
}
token = this.tn.next();
if (token.toLowerCase() !== "returns") {
throw(new Error("Illegal request/response delimiter in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('returns' expected)"));
}
token = this.tn.next();
if (token != Lang.COPTOPEN) {
throw(new Error("Illegal start of response type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTOPEN+"' expected)"));
}
token = this.tn.next();
method["response"] = token;
token = this.tn.next();
if (token !== Lang.COPTCLOSE) {
throw(new Error("Illegal end of response type in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.COPTCLOSE+"' expected)"))
}
token = this.tn.next();
if (token === Lang.OPEN) {
do {
token = this.tn.next();
if (token === 'option') {
this._parseOption(method, token); // <- will fail for the custom-options example
} else if (token !== Lang.CLOSE) {
throw(new Error("Illegal start of option in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('option' expected)"));
}
} while (token !== Lang.CLOSE);
} else if (token !== Lang.END) {
throw(new Error("Illegal method delimiter in RPC service "+svc["name"]+"#"+name+" at line "+this.tn.line+": "+token+" ('"+Lang.END+"' or '"+Lang.OPEN+"' expected)"));
}
if (typeof svc[type] === 'undefined') svc[type] = {};
svc[type][name] = method;
};
/**
* Parses a message definition.
* @param {Object} parent Parent definition
* @param {string} token First token
* @return {Object}
* @throws {Error} If the message cannot be parsed
* @private
*/
Parser.prototype._parseMessage = function(parent, token) {
/** @dict */
var msg = {}; // Note: At some point we might want to exclude the parser, so we need a dict.
token = this.tn.next();
if (!Lang.NAME.test(token)) {
throw(new Error("Illegal message name"+(parent ? " in message "+parent["name"] : "")+" at line "+this.tn.line+": "+token));
}
msg["name"] = token;
token = this.tn.next();
if (token != Lang.OPEN) {
throw(new Error("Illegal OPEN after message "+msg.name+" at line "+this.tn.line+": "+token+" ('"+Lang.OPEN+"' expected)"));
}
msg["fields"] = []; // Note: Using arrays to support also browser that cannot preserve order of object keys.
msg["enums"] = [];
msg["messages"] = [];
msg["options"] = {};
// msg["extensions"] = undefined
do {
token = this.tn.next();
if (token === Lang.CLOSE) {
token = this.tn.peek();
if (token === Lang.END) this.tn.next();
break;
} else if (Lang.RULE.test(token)) {
this._parseMessageField(msg, token);
} else if (token === "enum") {
this._parseEnum(msg, token);
} else if (token === "message") {
this._parseMessage(msg, token);
} else if (token === "option") {
this._parseOption(msg, token);
} else if (token === "extensions") {
msg["extensions"] = this._parseExtensions(msg, token);
} else if (token === "extend") {
this._parseExtend(msg, token);
} else {
throw(new Error("Illegal token in message "+msg.name+" at line "+this.tn.line+": "+token+" (type or '"+Lang.CLOSE+"' expected)"));
}
} while (true);
parent["messages"].push(msg);
return msg;
};
/**
* Parses a message field.
* @param {Object} msg Message definition
* @param {string} token Initial token
* @throws {Error} If the message field cannot be parsed