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 #include <google/protobuf/compiler/cpp/cpp_generator.h>
36
37 #include <vector>
38 #include <utility>
39
40 #include <google/protobuf/compiler/cpp/cpp_file.h>
41 #include <google/protobuf/compiler/cpp/cpp_helpers.h>
42 #include <google/protobuf/io/printer.h>
43 #include <google/protobuf/io/zero_copy_stream.h>
44 #include <google/protobuf/descriptor.pb.h>
45
46 namespace google {
47 namespace protobuf {
48 namespace compiler {
49 namespace cpp {
50
CppGenerator()51 CppGenerator::CppGenerator() {}
~CppGenerator()52 CppGenerator::~CppGenerator() {}
53
Generate(const FileDescriptor * file,const string & parameter,OutputDirectory * output_directory,string * error) const54 bool CppGenerator::Generate(const FileDescriptor* file,
55 const string& parameter,
56 OutputDirectory* output_directory,
57 string* error) const {
58 vector<pair<string, string> > options;
59 ParseGeneratorParameter(parameter, &options);
60
61 // -----------------------------------------------------------------
62 // parse generator options
63
64 // TODO(kenton): If we ever have more options, we may want to create a
65 // class that encapsulates them which we can pass down to all the
66 // generator classes. Currently we pass dllexport_decl down to all of
67 // them via the constructors, but we don't want to have to add another
68 // constructor parameter for every option.
69
70 // If the dllexport_decl option is passed to the compiler, we need to write
71 // it in front of every symbol that should be exported if this .proto is
72 // compiled into a Windows DLL. E.g., if the user invokes the protocol
73 // compiler as:
74 // protoc --cpp_out=dllexport_decl=FOO_EXPORT:outdir foo.proto
75 // then we'll define classes like this:
76 // class FOO_EXPORT Foo {
77 // ...
78 // }
79 // FOO_EXPORT is a macro which should expand to __declspec(dllexport) or
80 // __declspec(dllimport) depending on what is being compiled.
81 string dllexport_decl;
82
83 for (int i = 0; i < options.size(); i++) {
84 if (options[i].first == "dllexport_decl") {
85 dllexport_decl = options[i].second;
86 } else {
87 *error = "Unknown generator option: " + options[i].first;
88 return false;
89 }
90 }
91
92 // -----------------------------------------------------------------
93
94
95 string basename = StripProto(file->name());
96 basename.append(".pb");
97
98 FileGenerator file_generator(file, dllexport_decl);
99
100 // Generate header.
101 {
102 scoped_ptr<io::ZeroCopyOutputStream> output(
103 output_directory->Open(basename + ".h"));
104 io::Printer printer(output.get(), '$');
105 file_generator.GenerateHeader(&printer);
106 }
107
108 // Generate cc file.
109 {
110 scoped_ptr<io::ZeroCopyOutputStream> output(
111 output_directory->Open(basename + ".cc"));
112 io::Printer printer(output.get(), '$');
113 file_generator.GenerateSource(&printer);
114 }
115
116 return true;
117 }
118
119 } // namespace cpp
120 } // namespace compiler
121 } // namespace protobuf
122 } // namespace google
123