rcpsp_parser.h

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// Copyright 2010-2025 Google LLC
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
// A Project Scheduling Library parser.
// See: http://www.om-db.wi.tum.de/psplib/  # PSP-Lib homepage.
 
#ifndef ORTOOLS_SCHEDULING_RCPSP_PARSER_H_
#define ORTOOLS_SCHEDULING_RCPSP_PARSER_H_
 
#include <cstdint>
#include <string>
#include <vector>
 
#include "absl/strings/string_view.h"
#include "ortools/scheduling/rcpsp.pb.h"
 
namespace operations_research {
namespace scheduling {
namespace rcpsp {
 
// RCPSP parser.
// Parse a RCPSP problem and load it into a RcpspProblem proto.
// See description of the problem in ./rcpsp.proto
class RcpspParser {
 public:
  RcpspParser();
 
  // We keep the fully qualified name for swig.
  ::operations_research::scheduling::rcpsp::RcpspProblem problem() const {
    return rcpsp_;
  }
 
  // Returns false if an error occurred.
  bool ParseFile(const std::string& file_name);
 
 private:
  enum LoadStatus {
    NOT_STARTED,
    HEADER_SECTION,
    PROJECT_SECTION,
    INFO_SECTION,
    PRECEDENCE_SECTION,
    REQUEST_SECTION,
    RESOURCE_SECTION,
    RESOURCE_MIN_SECTION,
    PARSING_FINISHED,
    ERROR_FOUND
  };
 
  void ProcessRcpspLine(const std::string& line);
  void ProcessPattersonLine(const std::string& line);
  void ProcessRcpspMaxLine(const std::string& line);
  void ReportError(const std::string& line);
  // Sets the number of declared tasks, and initialize data structures
  // accordingly.
  void SetNumDeclaredTasks(int t);
  int strtoint32(absl::string_view word);
  int64_t strtoint64(absl::string_view word);
 
  std::string basedata_;
  int64_t seed_;
  LoadStatus load_status_;
  int num_declared_tasks_;
  int current_task_;
  std::vector<std::vector<int> > temp_delays_;
  std::vector<int> recipe_sizes_;
  int unreads_;
  RcpspProblem rcpsp_;
};
 
}  // namespace rcpsp
}  // namespace scheduling
}  // namespace operations_research
 
#endif  // ORTOOLS_SCHEDULING_RCPSP_PARSER_H_