// 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: kenton@google.com (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#include <google/protobuf/compiler/code_generator.h>

#include <google/protobuf/stubs/logging.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/stubs/strutil.h>

namespace google {
namespace protobuf {
namespace compiler {

CodeGenerator::~CodeGenerator() {}

bool CodeGenerator::GenerateAll(
    const vector<const FileDescriptor*>& files,
    const string& parameter,
    GeneratorContext* generator_context,
    string* error) const {
  // Default implemenation is just to call the per file method, and prefix any
  // error string with the file to provide context.
  bool succeeded = true;
  for (int i = 0; i < files.size(); i++) {
    const FileDescriptor* file = files[i];
    succeeded = Generate(file, parameter, generator_context, error);
    if (!succeeded && error && error->empty()) {
      *error = "Code generator returned false but provided no error "
               "description.";
    }
    if (error && !error->empty()) {
      *error = file->name() + ": " + *error;
      break;
    }
    if (!succeeded) {
      break;
    }
  }
  return succeeded;
}

GeneratorContext::~GeneratorContext() {}

io::ZeroCopyOutputStream*
GeneratorContext::OpenForAppend(const string& filename) {
  return NULL;
}

io::ZeroCopyOutputStream* GeneratorContext::OpenForInsert(
    const string& filename, const string& insertion_point) {
  GOOGLE_LOG(FATAL) << "This GeneratorContext does not support insertion.";
  return NULL;  // make compiler happy
}

void GeneratorContext::ListParsedFiles(
    vector<const FileDescriptor*>* output) {
  GOOGLE_LOG(FATAL) << "This GeneratorContext does not support ListParsedFiles";
}

// Parses a set of comma-delimited name/value pairs.
void ParseGeneratorParameter(const string& text,
                             vector<pair<string, string> >* output) {
  vector<string> parts = Split(text, ",", true);

  for (int i = 0; i < parts.size(); i++) {
    string::size_type equals_pos = parts[i].find_first_of('=');
    pair<string, string> value;
    if (equals_pos == string::npos) {
      value.first = parts[i];
      value.second = "";
    } else {
      value.first = parts[i].substr(0, equals_pos);
      value.second = parts[i].substr(equals_pos + 1);
    }
    output->push_back(value);
  }
}

}  // namespace compiler
}  // namespace protobuf
}  // namespace google
