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//
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10// notice, this list of conditions and the following disclaimer.
11//     * Redistributions in binary form must reproduce the above
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13// in the documentation and/or other materials provided with the
14// distribution.
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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,
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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
46namespace google {
47namespace protobuf {
48namespace compiler {
49namespace cpp {
50
51CppGenerator::CppGenerator() {}
52CppGenerator::~CppGenerator() {}
53
54bool 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