aboutsummaryrefslogtreecommitdiff
path: root/NorthstarDedicatedTest/include/protobuf/text_format.h
blob: 5b6f1d57b7fa6769d5a97a3199abf9b48843de1f (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
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
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Author: jschorr@google.com (Joseph Schorr)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.
//
// Utilities for printing and parsing protocol messages in a human-readable,
// text-based format.

#ifndef GOOGLE_PROTOBUF_TEXT_FORMAT_H__
#define GOOGLE_PROTOBUF_TEXT_FORMAT_H__

#include <map>
#include <memory>
#include <string>
#include <vector>

#include <stubs/common.h>
#include <descriptor.h>
#include <message.h>
#include <message_lite.h>
#include <port.h>

#include <port_def.inc>

#ifdef SWIG
#error "You cannot SWIG proto headers"
#endif

namespace google {
namespace protobuf {

namespace io {
class ErrorCollector;  // tokenizer.h
}

// This class implements protocol buffer text format, colloquially known as text
// proto.  Printing and parsing protocol messages in text format is useful for
// debugging and human editing of messages.
//
// This class is really a namespace that contains only static methods.
class PROTOBUF_EXPORT TextFormat {
 public:
  // Outputs a textual representation of the given message to the given
  // output stream. Returns false if printing fails.
  static bool Print(const Message& message, io::ZeroCopyOutputStream* output);

  // Print the fields in an UnknownFieldSet.  They are printed by tag number
  // only.  Embedded messages are heuristically identified by attempting to
  // parse them. Returns false if printing fails.
  static bool PrintUnknownFields(const UnknownFieldSet& unknown_fields,
                                 io::ZeroCopyOutputStream* output);

  // Like Print(), but outputs directly to a string.
  // Note: output will be cleared prior to printing, and will be left empty
  // even if printing fails. Returns false if printing fails.
  static bool PrintToString(const Message& message, std::string* output);

  // Like PrintUnknownFields(), but outputs directly to a string. Returns
  // false if printing fails.
  static bool PrintUnknownFieldsToString(const UnknownFieldSet& unknown_fields,
                                         std::string* output);

  // Outputs a textual representation of the value of the field supplied on
  // the message supplied. For non-repeated fields, an index of -1 must
  // be supplied. Note that this method will print the default value for a
  // field if it is not set.
  static void PrintFieldValueToString(const Message& message,
                                      const FieldDescriptor* field, int index,
                                      std::string* output);

  class PROTOBUF_EXPORT BaseTextGenerator {
   public:
    virtual ~BaseTextGenerator();

    virtual void Indent() {}
    virtual void Outdent() {}
    // Returns the current indentation size in characters.
    virtual size_t GetCurrentIndentationSize() const { return 0; }

    // Print text to the output stream.
    virtual void Print(const char* text, size_t size) = 0;

    void PrintString(const std::string& str) { Print(str.data(), str.size()); }

    template <size_t n>
    void PrintLiteral(const char (&text)[n]) {
      Print(text, n - 1);  // n includes the terminating zero character.
    }
  };

  // The default printer that converts scalar values from fields into their
  // string representation.
  // You can derive from this FastFieldValuePrinter if you want to have fields
  // to be printed in a different way and register it at the Printer.
  class PROTOBUF_EXPORT FastFieldValuePrinter {
   public:
    FastFieldValuePrinter();
    virtual ~FastFieldValuePrinter();
    virtual void PrintBool(bool val, BaseTextGenerator* generator) const;
    virtual void PrintInt32(int32_t val, BaseTextGenerator* generator) const;
    virtual void PrintUInt32(uint32_t val, BaseTextGenerator* generator) const;
    virtual void PrintInt64(int64_t val, BaseTextGenerator* generator) const;
    virtual void PrintUInt64(uint64_t val, BaseTextGenerator* generator) const;
    virtual void PrintFloat(float val, BaseTextGenerator* generator) const;
    virtual void PrintDouble(double val, BaseTextGenerator* generator) const;
    virtual void PrintString(const std::string& val,
                             BaseTextGenerator* generator) const;
    virtual void PrintBytes(const std::string& val,
                            BaseTextGenerator* generator) const;
    virtual void PrintEnum(int32_t val, const std::string& name,
                           BaseTextGenerator* generator) const;
    virtual void PrintFieldName(const Message& message, int field_index,
                                int field_count, const Reflection* reflection,
                                const FieldDescriptor* field,
                                BaseTextGenerator* generator) const;
    virtual void PrintFieldName(const Message& message,
                                const Reflection* reflection,
                                const FieldDescriptor* field,
                                BaseTextGenerator* generator) const;
    virtual void PrintMessageStart(const Message& message, int field_index,
                                   int field_count, bool single_line_mode,
                                   BaseTextGenerator* generator) const;
    // Allows to override the logic on how to print the content of a message.
    // Return false to use the default printing logic. Note that it is legal for
    // this function to print something and then return false to use the default
    // content printing (although at that point it would behave similarly to
    // PrintMessageStart).
    virtual bool PrintMessageContent(const Message& message, int field_index,
                                     int field_count, bool single_line_mode,
                                     BaseTextGenerator* generator) const;
    virtual void PrintMessageEnd(const Message& message, int field_index,
                                 int field_count, bool single_line_mode,
                                 BaseTextGenerator* generator) const;

   private:
    GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(FastFieldValuePrinter);
  };

  // Deprecated: please use FastFieldValuePrinter instead.
  class PROTOBUF_EXPORT FieldValuePrinter {
   public:
    FieldValuePrinter();
    virtual ~FieldValuePrinter();
    virtual std::string PrintBool(bool val) const;
    virtual std::string PrintInt32(int32_t val) const;
    virtual std::string PrintUInt32(uint32_t val) const;
    virtual std::string PrintInt64(int64_t val) const;
    virtual std::string PrintUInt64(uint64_t val) const;
    virtual std::string PrintFloat(float val) const;
    virtual std::string PrintDouble(double val) const;
    virtual std::string PrintString(const std::string& val) const;
    virtual std::string PrintBytes(const std::string& val) const;
    virtual std::string PrintEnum(int32_t val, const std::string& name) const;
    virtual std::string PrintFieldName(const Message& message,
                                       const Reflection* reflection,
                                       const FieldDescriptor* field) const;
    virtual std::string PrintMessageStart(const Message& message,
                                          int field_index, int field_count,
                                          bool single_line_mode) const;
    virtual std::string PrintMessageEnd(const Message& message, int field_index,
                                        int field_count,
                                        bool single_line_mode) const;

   private:
    FastFieldValuePrinter delegate_;
    GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(FieldValuePrinter);
  };

  class PROTOBUF_EXPORT MessagePrinter {
   public:
    MessagePrinter() {}
    virtual ~MessagePrinter() {}
    virtual void Print(const Message& message, bool single_line_mode,
                       BaseTextGenerator* generator) const = 0;

   private:
    GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MessagePrinter);
  };

  // Interface that Printers or Parsers can use to find extensions, or types
  // referenced in Any messages.
  class PROTOBUF_EXPORT Finder {
   public:
    virtual ~Finder();

    // Try to find an extension of *message by fully-qualified field
    // name.  Returns nullptr if no extension is known for this name or number.
    // The base implementation uses the extensions already known by the message.
    virtual const FieldDescriptor* FindExtension(Message* message,
                                                 const std::string& name) const;

    // Similar to FindExtension, but uses a Descriptor and the extension number
    // instead of using a Message and the name when doing the look up.
    virtual const FieldDescriptor* FindExtensionByNumber(
        const Descriptor* descriptor, int number) const;

    // Find the message type for an Any proto.
    // Returns nullptr if no message is known for this name.
    // The base implementation only accepts prefixes of type.googleprod.com/ or
    // type.googleapis.com/, and searches the DescriptorPool of the parent
    // message.
    virtual const Descriptor* FindAnyType(const Message& message,
                                          const std::string& prefix,
                                          const std::string& name) const;

    // Find the message factory for the given extension field. This can be used
    // to generalize the Parser to add extension fields to a message in the same
    // way as the "input" message for the Parser.
    virtual MessageFactory* FindExtensionFactory(
        const FieldDescriptor* field) const;
  };

  // Class for those users which require more fine-grained control over how
  // a protobuffer message is printed out.
  class PROTOBUF_EXPORT Printer {
   public:
    Printer();

    // Like TextFormat::Print
    bool Print(const Message& message, io::ZeroCopyOutputStream* output) const;
    // Like TextFormat::PrintUnknownFields
    bool PrintUnknownFields(const UnknownFieldSet& unknown_fields,
                            io::ZeroCopyOutputStream* output) const;
    // Like TextFormat::PrintToString
    bool PrintToString(const Message& message, std::string* output) const;
    // Like TextFormat::PrintUnknownFieldsToString
    bool PrintUnknownFieldsToString(const UnknownFieldSet& unknown_fields,
                                    std::string* output) const;
    // Like TextFormat::PrintFieldValueToString
    void PrintFieldValueToString(const Message& message,
                                 const FieldDescriptor* field, int index,
                                 std::string* output) const;

    // Adjust the initial indent level of all output.  Each indent level is
    // equal to two spaces.
    void SetInitialIndentLevel(int indent_level) {
      initial_indent_level_ = indent_level;
    }

    // If printing in single line mode, then the entire message will be output
    // on a single line with no line breaks.
    void SetSingleLineMode(bool single_line_mode) {
      single_line_mode_ = single_line_mode;
    }

    bool IsInSingleLineMode() const { return single_line_mode_; }

    // If use_field_number is true, uses field number instead of field name.
    void SetUseFieldNumber(bool use_field_number) {
      use_field_number_ = use_field_number;
    }

    // Set true to print repeated primitives in a format like:
    //   field_name: [1, 2, 3, 4]
    // instead of printing each value on its own line.  Short format applies
    // only to primitive values -- i.e. everything except strings and
    // sub-messages/groups.
    void SetUseShortRepeatedPrimitives(bool use_short_repeated_primitives) {
      use_short_repeated_primitives_ = use_short_repeated_primitives;
    }

    // Set true to output UTF-8 instead of ASCII.  The only difference
    // is that bytes >= 0x80 in string fields will not be escaped,
    // because they are assumed to be part of UTF-8 multi-byte
    // sequences. This will change the default FastFieldValuePrinter.
    void SetUseUtf8StringEscaping(bool as_utf8);

    // Set the default FastFieldValuePrinter that is used for all fields that
    // don't have a field-specific printer registered.
    // Takes ownership of the printer.
    void SetDefaultFieldValuePrinter(const FastFieldValuePrinter* printer);

    PROTOBUF_DEPRECATED_MSG("Please use FastFieldValuePrinter")
    void SetDefaultFieldValuePrinter(const FieldValuePrinter* printer);

    // Sets whether we want to hide unknown fields or not.
    // Usually unknown fields are printed in a generic way that includes the
    // tag number of the field instead of field name. However, sometimes it
    // is useful to be able to print the message without unknown fields (e.g.
    // for the python protobuf version to maintain consistency between its pure
    // python and c++ implementations).
    void SetHideUnknownFields(bool hide) { hide_unknown_fields_ = hide; }

    // If print_message_fields_in_index_order is true, fields of a proto message
    // will be printed using the order defined in source code instead of the
    // field number, extensions will be printed at the end of the message
    // and their relative order is determined by the extension number.
    // By default, use the field number order.
    void SetPrintMessageFieldsInIndexOrder(
        bool print_message_fields_in_index_order) {
      print_message_fields_in_index_order_ =
          print_message_fields_in_index_order;
    }

    // If expand==true, expand google.protobuf.Any payloads. The output
    // will be of form
    //    [type_url] { <value_printed_in_text> }
    //
    // If expand==false, print Any using the default printer. The output will
    // look like
    //    type_url: "<type_url>"  value: "serialized_content"
    void SetExpandAny(bool expand) { expand_any_ = expand; }

    // Set how parser finds message for Any payloads.
    void SetFinder(const Finder* finder) { finder_ = finder; }

    // If non-zero, we truncate all string fields that are  longer than
    // this threshold.  This is useful when the proto message has very long
    // strings, e.g., dump of encoded image file.
    //
    // NOTE(hfgong):  Setting a non-zero value breaks round-trip safe
    // property of TextFormat::Printer.  That is, from the printed message, we
    // cannot fully recover the original string field any more.
    void SetTruncateStringFieldLongerThan(
        const int64_t truncate_string_field_longer_than) {
      truncate_string_field_longer_than_ = truncate_string_field_longer_than;
    }

    // Register a custom field-specific FastFieldValuePrinter for fields
    // with a particular FieldDescriptor.
    // Returns "true" if the registration succeeded, or "false", if there is
    // already a printer for that FieldDescriptor.
    // Takes ownership of the printer on successful registration.
    bool RegisterFieldValuePrinter(const FieldDescriptor* field,
                                   const FastFieldValuePrinter* printer);

    PROTOBUF_DEPRECATED_MSG("Please use FastFieldValuePrinter")
    bool RegisterFieldValuePrinter(const FieldDescriptor* field,
                                   const FieldValuePrinter* printer);

    // Register a custom message-specific MessagePrinter for messages with a
    // particular Descriptor.
    // Returns "true" if the registration succeeded, or "false" if there is
    // already a printer for that Descriptor.
    bool RegisterMessagePrinter(const Descriptor* descriptor,
                                const MessagePrinter* printer);

   private:
    friend std::string Message::DebugString() const;
    friend std::string Message::ShortDebugString() const;
    friend std::string Message::Utf8DebugString() const;

    // Sets whether *DebugString should insert a silent marker.
    void SetInsertSilentMarker(bool v) { insert_silent_marker_ = v; }

    // Forward declaration of an internal class used to print the text
    // output to the OutputStream (see text_format.cc for implementation).
    class TextGenerator;

    // Forward declaration of an internal class used to print field values for
    // DebugString APIs (see text_format.cc for implementation).
    class DebugStringFieldValuePrinter;

    // Forward declaration of an internal class used to print UTF-8 escaped
    // strings (see text_format.cc for implementation).
    class FastFieldValuePrinterUtf8Escaping;

    static const char* const kDoNotParse;

    // Internal Print method, used for writing to the OutputStream via
    // the TextGenerator class.
    void Print(const Message& message, TextGenerator* generator) const;

    // Print a single field.
    void PrintField(const Message& message, const Reflection* reflection,
                    const FieldDescriptor* field,
                    TextGenerator* generator) const;

    // Print a repeated primitive field in short form.
    void PrintShortRepeatedField(const Message& message,
                                 const Reflection* reflection,
                                 const FieldDescriptor* field,
                                 TextGenerator* generator) const;

    // Print the name of a field -- i.e. everything that comes before the
    // ':' for a single name/value pair.
    void PrintFieldName(const Message& message, int field_index,
                        int field_count, const Reflection* reflection,
                        const FieldDescriptor* field,
                        TextGenerator* generator) const;

    // Outputs a textual representation of the value of the field supplied on
    // the message supplied or the default value if not set.
    void PrintFieldValue(const Message& message, const Reflection* reflection,
                         const FieldDescriptor* field, int index,
                         TextGenerator* generator) const;

    // Print the fields in an UnknownFieldSet.  They are printed by tag number
    // only.  Embedded messages are heuristically identified by attempting to
    // parse them (subject to the recursion budget).
    void PrintUnknownFields(const UnknownFieldSet& unknown_fields,
                            TextGenerator* generator,
                            int recursion_budget) const;

    bool PrintAny(const Message& message, TextGenerator* generator) const;

    const FastFieldValuePrinter* GetFieldPrinter(
        const FieldDescriptor* field) const {
      auto it = custom_printers_.find(field);
      return it == custom_printers_.end() ? default_field_value_printer_.get()
                                          : it->second.get();
    }

    int initial_indent_level_;
    bool single_line_mode_;
    bool use_field_number_;
    bool use_short_repeated_primitives_;
    bool insert_silent_marker_;
    bool hide_unknown_fields_;
    bool print_message_fields_in_index_order_;
    bool expand_any_;
    int64_t truncate_string_field_longer_than_;

    std::unique_ptr<const FastFieldValuePrinter> default_field_value_printer_;
    typedef std::map<const FieldDescriptor*,
                     std::unique_ptr<const FastFieldValuePrinter>>
        CustomPrinterMap;
    CustomPrinterMap custom_printers_;

    typedef std::map<const Descriptor*, std::unique_ptr<const MessagePrinter>>
        CustomMessagePrinterMap;
    CustomMessagePrinterMap custom_message_printers_;

    const Finder* finder_;
  };

  // Parses a text-format protocol message from the given input stream to
  // the given message object. This function parses the human-readable format
  // written by Print(). Returns true on success. The message is cleared first,
  // even if the function fails -- See Merge() to avoid this behavior.
  //
  // Example input: "user {\n id: 123 extra { gender: MALE language: 'en' }\n}"
  //
  // One use for this function is parsing handwritten strings in test code.
  // Another use is to parse the output from google::protobuf::Message::DebugString()
  // (or ShortDebugString()), because these functions output using
  // google::protobuf::TextFormat::Print().
  //
  // If you would like to read a protocol buffer serialized in the
  // (non-human-readable) binary wire format, see
  // google::protobuf::MessageLite::ParseFromString().
  static bool Parse(io::ZeroCopyInputStream* input, Message* output);
  // Like Parse(), but reads directly from a string.
  static bool ParseFromString(ConstStringParam input, Message* output);

  // Like Parse(), but the data is merged into the given message, as if
  // using Message::MergeFrom().
  static bool Merge(io::ZeroCopyInputStream* input, Message* output);
  // Like Merge(), but reads directly from a string.
  static bool MergeFromString(ConstStringParam input, Message* output);

  // Parse the given text as a single field value and store it into the
  // given field of the given message. If the field is a repeated field,
  // the new value will be added to the end
  static bool ParseFieldValueFromString(const std::string& input,
                                        const FieldDescriptor* field,
                                        Message* message);

  // A location in the parsed text.
  struct ParseLocation {
    int line;
    int column;

    ParseLocation() : line(-1), column(-1) {}
    ParseLocation(int line_param, int column_param)
        : line(line_param), column(column_param) {}
  };

  // A range of locations in the parsed text, including `start` and excluding
  // `end`.
  struct ParseLocationRange {
    ParseLocation start;
    ParseLocation end;
    ParseLocationRange() : start(), end() {}
    ParseLocationRange(ParseLocation start_param, ParseLocation end_param)
        : start(start_param), end(end_param) {}
  };

  // Data structure which is populated with the locations of each field
  // value parsed from the text.
  class PROTOBUF_EXPORT ParseInfoTree {
   public:
    ParseInfoTree() = default;
    ParseInfoTree(const ParseInfoTree&) = delete;
    ParseInfoTree& operator=(const ParseInfoTree&) = delete;

    // Returns the parse location range for index-th value of the field in
    // the parsed text. If none exists, returns a location with start and end
    // line -1. Index should be -1 for not-repeated fields.
    ParseLocationRange GetLocationRange(const FieldDescriptor* field,
                                        int index) const;

    // Returns the starting parse location for index-th value of the field in
    // the parsed text. If none exists, returns a location with line = -1. Index
    // should be -1 for not-repeated fields.
    ParseLocation GetLocation(const FieldDescriptor* field, int index) const {
      return GetLocationRange(field, index).start;
    }

    // Returns the parse info tree for the given field, which must be a message
    // type. The nested information tree is owned by the root tree and will be
    // deleted when it is deleted.
    ParseInfoTree* GetTreeForNested(const FieldDescriptor* field,
                                    int index) const;

   private:
    // Allow the text format parser to record information into the tree.
    friend class TextFormat;

    // Records the starting and ending locations of a single value for a field.
    void RecordLocation(const FieldDescriptor* field, ParseLocationRange range);

    // Create and records a nested tree for a nested message field.
    ParseInfoTree* CreateNested(const FieldDescriptor* field);

    // Defines the map from the index-th field descriptor to its parse location.
    typedef std::map<const FieldDescriptor*, std::vector<ParseLocationRange>>
        LocationMap;

    // Defines the map from the index-th field descriptor to the nested parse
    // info tree.
    typedef std::map<const FieldDescriptor*,
                     std::vector<std::unique_ptr<ParseInfoTree>>>
        NestedMap;

    LocationMap locations_;
    NestedMap nested_;
  };

  // For more control over parsing, use this class.
  class PROTOBUF_EXPORT Parser {
   public:
    Parser();
    ~Parser();

    // Like TextFormat::Parse().
    bool Parse(io::ZeroCopyInputStream* input, Message* output);
    // Like TextFormat::ParseFromString().
    bool ParseFromString(ConstStringParam input, Message* output);
    // Like TextFormat::Merge().
    bool Merge(io::ZeroCopyInputStream* input, Message* output);
    // Like TextFormat::MergeFromString().
    bool MergeFromString(ConstStringParam input, Message* output);

    // Set where to report parse errors.  If nullptr (the default), errors will
    // be printed to stderr.
    void RecordErrorsTo(io::ErrorCollector* error_collector) {
      error_collector_ = error_collector;
    }

    // Set how parser finds extensions.  If nullptr (the default), the
    // parser will use the standard Reflection object associated with
    // the message being parsed.
    void SetFinder(const Finder* finder) { finder_ = finder; }

    // Sets where location information about the parse will be written. If
    // nullptr
    // (the default), then no location will be written.
    void WriteLocationsTo(ParseInfoTree* tree) { parse_info_tree_ = tree; }

    // Normally parsing fails if, after parsing, output->IsInitialized()
    // returns false.  Call AllowPartialMessage(true) to skip this check.
    void AllowPartialMessage(bool allow) { allow_partial_ = allow; }

    // Allow field names to be matched case-insensitively.
    // This is not advisable if there are fields that only differ in case, or
    // if you want to enforce writing in the canonical form.
    // This is 'false' by default.
    void AllowCaseInsensitiveField(bool allow) {
      allow_case_insensitive_field_ = allow;
    }

    // Like TextFormat::ParseFieldValueFromString
    bool ParseFieldValueFromString(const std::string& input,
                                   const FieldDescriptor* field,
                                   Message* output);

    // When an unknown extension is met, parsing will fail if this option is
    // set to false (the default). If true, unknown extensions will be ignored
    // and a warning message will be generated.
    // Beware! Setting this option true may hide some errors (e.g. spelling
    // error on extension name).  This allows data loss; unlike binary format,
    // text format cannot preserve unknown extensions.  Avoid using this option
    // if possible.
    void AllowUnknownExtension(bool allow) { allow_unknown_extension_ = allow; }

    // When an unknown field is met, parsing will fail if this option is set
    // to false (the default). If true, unknown fields will be ignored and
    // a warning message will be generated.
    // Beware! Setting this option true may hide some errors (e.g. spelling
    // error on field name). This allows data loss; unlike binary format, text
    // format cannot preserve unknown fields.  Avoid using this option
    // if possible.
    void AllowUnknownField(bool allow) { allow_unknown_field_ = allow; }


    void AllowFieldNumber(bool allow) { allow_field_number_ = allow; }

    // Sets maximum recursion depth which parser can use. This is effectively
    // the maximum allowed nesting of proto messages.
    void SetRecursionLimit(int limit) { recursion_limit_ = limit; }

   private:
    // Forward declaration of an internal class used to parse text
    // representations (see text_format.cc for implementation).
    class ParserImpl;

    // Like TextFormat::Merge().  The provided implementation is used
    // to do the parsing.
    bool MergeUsingImpl(io::ZeroCopyInputStream* input, Message* output,
                        ParserImpl* parser_impl);

    io::ErrorCollector* error_collector_;
    const Finder* finder_;
    ParseInfoTree* parse_info_tree_;
    bool allow_partial_;
    bool allow_case_insensitive_field_;
    bool allow_unknown_field_;
    bool allow_unknown_extension_;
    bool allow_unknown_enum_;
    bool allow_field_number_;
    bool allow_relaxed_whitespace_;
    bool allow_singular_overwrites_;
    int recursion_limit_;
  };


 private:
  // Hack: ParseInfoTree declares TextFormat as a friend which should extend
  // the friendship to TextFormat::Parser::ParserImpl, but unfortunately some
  // old compilers (e.g. GCC 3.4.6) don't implement this correctly. We provide
  // helpers for ParserImpl to call methods of ParseInfoTree.
  static inline void RecordLocation(ParseInfoTree* info_tree,
                                    const FieldDescriptor* field,
                                    ParseLocationRange location);
  static inline ParseInfoTree* CreateNested(ParseInfoTree* info_tree,
                                            const FieldDescriptor* field);

  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(TextFormat);
};

inline void TextFormat::RecordLocation(ParseInfoTree* info_tree,
                                       const FieldDescriptor* field,
                                       ParseLocationRange location) {
  info_tree->RecordLocation(field, location);
}

inline TextFormat::ParseInfoTree* TextFormat::CreateNested(
    ParseInfoTree* info_tree, const FieldDescriptor* field) {
  return info_tree->CreateNested(field);
}

}  // namespace protobuf
}  // namespace google

#include <port_undef.inc>

#endif  // GOOGLE_PROTOBUF_TEXT_FORMAT_H__