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1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc.  All rights reserved.
3 // http://code.google.com/p/protobuf/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 //     * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 //     * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
14 // distribution.
15 //     * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 
31 // Author: kenton@google.com (Kenton Varda)
32 //  Based on original Protocol Buffers design by
33 //  Sanjay Ghemawat, Jeff Dean, and others.
34 
35 #ifndef GOOGLE_PROTOBUF_COMPILER_CPP_HELPERS_H__
36 #define GOOGLE_PROTOBUF_COMPILER_CPP_HELPERS_H__
37 
38 #include <string>
39 #include <google/protobuf/descriptor.h>
40 #include <google/protobuf/descriptor.pb.h>
41 
42 namespace google {
43 namespace protobuf {
44 namespace compiler {
45 namespace cpp {
46 
47 // Commonly-used separator comments.  Thick is a line of '=', thin is a line
48 // of '-'.
49 extern const char kThickSeparator[];
50 extern const char kThinSeparator[];
51 
52 // Returns the non-nested type name for the given type.  If "qualified" is
53 // true, prefix the type with the full namespace.  For example, if you had:
54 //   package foo.bar;
55 //   message Baz { message Qux {} }
56 // Then the qualified ClassName for Qux would be:
57 //   ::foo::bar::Baz_Qux
58 // While the non-qualified version would be:
59 //   Baz_Qux
60 string ClassName(const Descriptor* descriptor, bool qualified);
61 string ClassName(const EnumDescriptor* enum_descriptor, bool qualified);
62 
63 string SuperClassName(const Descriptor* descriptor);
64 
65 // Get the (unqualified) name that should be used for this field in C++ code.
66 // The name is coerced to lower-case to emulate proto1 behavior.  People
67 // should be using lowercase-with-underscores style for proto field names
68 // anyway, so normally this just returns field->name().
69 string FieldName(const FieldDescriptor* field);
70 
71 // Get the unqualified name that should be used for a field's field
72 // number constant.
73 string FieldConstantName(const FieldDescriptor *field);
74 
75 // Returns the scope where the field was defined (for extensions, this is
76 // different from the message type to which the field applies).
FieldScope(const FieldDescriptor * field)77 inline const Descriptor* FieldScope(const FieldDescriptor* field) {
78   return field->is_extension() ?
79     field->extension_scope() : field->containing_type();
80 }
81 
82 // Returns the fully-qualified type name field->message_type().  Usually this
83 // is just ClassName(field->message_type(), true);
84 string FieldMessageTypeName(const FieldDescriptor* field);
85 
86 // Strips ".proto" or ".protodevel" from the end of a filename.
87 string StripProto(const string& filename);
88 
89 // Get the C++ type name for a primitive type (e.g. "double", "::google::protobuf::int32", etc.).
90 // Note:  non-built-in type names will be qualified, meaning they will start
91 // with a ::.  If you are using the type as a template parameter, you will
92 // need to insure there is a space between the < and the ::, because the
93 // ridiculous C++ standard defines "<:" to be a synonym for "[".
94 const char* PrimitiveTypeName(FieldDescriptor::CppType type);
95 
96 // Get the declared type name in CamelCase format, as is used e.g. for the
97 // methods of WireFormat.  For example, TYPE_INT32 becomes "Int32".
98 const char* DeclaredTypeMethodName(FieldDescriptor::Type type);
99 
100 // Get code that evaluates to the field's default value.
101 string DefaultValue(const FieldDescriptor* field);
102 
103 // Convert a file name into a valid identifier.
104 string FilenameIdentifier(const string& filename);
105 
106 // Return the name of the AddDescriptors() function for a given file.
107 string GlobalAddDescriptorsName(const string& filename);
108 
109 // Return the name of the AssignDescriptors() function for a given file.
110 string GlobalAssignDescriptorsName(const string& filename);
111 
112 // Return the name of the ShutdownFile() function for a given file.
113 string GlobalShutdownFileName(const string& filename);
114 
115 // Do message classes in this file keep track of unknown fields?
HasUnknownFields(const FileDescriptor * file)116 inline bool HasUnknownFields(const FileDescriptor *file) {
117   return file->options().optimize_for() != FileOptions::LITE_RUNTIME;
118 }
119 
120 // Does this file have generated parsing, serialization, and other
121 // standard methods for which reflection-based fallback implementations exist?
HasGeneratedMethods(const FileDescriptor * file)122 inline bool HasGeneratedMethods(const FileDescriptor *file) {
123   return file->options().optimize_for() != FileOptions::CODE_SIZE;
124 }
125 
126 // Do message classes in this file have descriptor and refelction methods?
HasDescriptorMethods(const FileDescriptor * file)127 inline bool HasDescriptorMethods(const FileDescriptor *file) {
128   return file->options().optimize_for() != FileOptions::LITE_RUNTIME;
129 }
130 
131 // Should we generate generic services for this file?
HasGenericServices(const FileDescriptor * file)132 inline bool HasGenericServices(const FileDescriptor *file) {
133   return file->service_count() > 0 &&
134          file->options().optimize_for() != FileOptions::LITE_RUNTIME &&
135          file->options().cc_generic_services();
136 }
137 
138 // Should string fields in this file verify that their contents are UTF-8?
HasUtf8Verification(const FileDescriptor * file)139 inline bool HasUtf8Verification(const FileDescriptor* file) {
140   return file->options().optimize_for() != FileOptions::LITE_RUNTIME;
141 }
142 
143 // Should we generate a separate, super-optimized code path for serializing to
144 // flat arrays?  We don't do this in Lite mode because we'd rather reduce code
145 // size.
HasFastArraySerialization(const FileDescriptor * file)146 inline bool HasFastArraySerialization(const FileDescriptor* file) {
147   return file->options().optimize_for() == FileOptions::SPEED;
148 }
149 
150 
151 }  // namespace cpp
152 }  // namespace compiler
153 }  // namespace protobuf
154 
155 }  // namespace google
156 #endif  // GOOGLE_PROTOBUF_COMPILER_CPP_HELPERS_H__
157