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
|
// 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.
#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_PARSE_FUNCTION_GENERATOR_H__
#define GOOGLE_PROTOBUF_COMPILER_CPP_PARSE_FUNCTION_GENERATOR_H__
#include <string>
#include <vector>
#include "google/protobuf/descriptor.h"
#include "y_absl/container/flat_hash_map.h"
#include "google/protobuf/compiler/cpp/helpers.h"
#include "google/protobuf/compiler/cpp/options.h"
#include "google/protobuf/generated_message_tctable_gen.h"
#include "google/protobuf/io/printer.h"
#include "google/protobuf/wire_format_lite.h"
namespace google {
namespace protobuf {
namespace compiler {
namespace cpp {
// ParseFunctionGenerator generates the _InternalParse function for a message
// (and any associated supporting members).
class ParseFunctionGenerator {
public:
ParseFunctionGenerator(
const Descriptor* descriptor, int max_has_bit_index,
const std::vector<int>& has_bit_indices,
const std::vector<int>& inlined_string_indices, const Options& options,
MessageSCCAnalyzer* scc_analyzer,
const y_absl::flat_hash_map<y_absl::string_view, TProtoStringType>& vars);
// Emits class-level method declarations to `printer`:
void GenerateMethodDecls(io::Printer* printer);
// Emits out-of-class method implementation definitions to `printer`:
void GenerateMethodImpls(io::Printer* printer);
// Emits class-level data member declarations to `printer`:
void GenerateDataDecls(io::Printer* printer);
// Emits out-of-class data member definitions to `printer`:
void GenerateDataDefinitions(io::Printer* printer);
private:
class GeneratedOptionProvider;
// Returns true if tailcall table code should be generated.
bool should_generate_tctable() const;
// Returns true if tailcall table code should be generated, but inside an
// #ifdef guard.
bool should_generate_guarded_tctable() const {
return should_generate_tctable() &&
options_.tctable_mode == Options::kTCTableGuarded;
}
// Generates a tail-calling `_InternalParse` function.
void GenerateTailcallParseFunction(Formatter& format);
// Generates a fallback function for tailcall table-based parsing.
void GenerateTailcallFallbackFunction(Formatter& format);
// Generates a looping `_InternalParse` function.
void GenerateLoopingParseFunction(Formatter& format);
// Generates the tail-call table definition.
void GenerateTailCallTable(Formatter& format);
void GenerateFastFieldEntries(Formatter& format);
void GenerateFieldEntries(Formatter& format);
void GenerateFieldNames(Formatter& format);
// Generates parsing code for an `ArenaString` field.
void GenerateArenaString(Formatter& format, const FieldDescriptor* field);
// Generates parsing code for a string-typed field.
void GenerateStrings(Formatter& format, const FieldDescriptor* field,
bool check_utf8);
// Generates parsing code for a length-delimited field (strings, messages,
// etc.).
void GenerateLengthDelim(Formatter& format, const FieldDescriptor* field);
// Generates the parsing code for a known field.
void GenerateFieldBody(Formatter& format,
google::protobuf::internal::WireFormatLite::WireType wiretype,
const FieldDescriptor* field);
// Generates code to parse the next field from the input stream.
void GenerateParseIterationBody(
Formatter& format, const Descriptor* descriptor,
const std::vector<const FieldDescriptor*>& fields);
// Generates a `switch` statement to parse each of `fields`.
void GenerateFieldSwitch(Formatter& format,
const std::vector<const FieldDescriptor*>& fields);
const Descriptor* descriptor_;
MessageSCCAnalyzer* scc_analyzer_;
const Options& options_;
y_absl::flat_hash_map<y_absl::string_view, TProtoStringType> variables_;
std::unique_ptr<internal::TailCallTableInfo> tc_table_info_;
std::vector<int> inlined_string_indices_;
const std::vector<const FieldDescriptor*> ordered_fields_;
int num_hasbits_;
};
} // namespace cpp
} // namespace compiler
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_COMPILER_CPP_PARSE_FUNCTION_GENERATOR_H__
|
