OR-Tools  8.1
parser_main.cc
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1 // Copyright 2010-2018 Google LLC
2 // Licensed under the Apache License, Version 2.0 (the "License");
3 // you may not use this file except in compliance with the License.
4 // You may obtain a copy of the License at
5 //
6 // http://www.apache.org/licenses/LICENSE-2.0
7 //
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
13 
14 // This binary reads an input file in the flatzinc format (see
15 // http://www.minizinc.org/), parses it, and spits out the model it
16 // has built.
17 
18 #include <string>
19 
20 #include "absl/flags/flag.h"
22 #include "ortools/base/timer.h"
24 #include "ortools/flatzinc/model.h"
27 
28 ABSL_FLAG(std::string, file, "", "Input file in the flatzinc format.");
29 ABSL_FLAG(bool, print, false, "Print model.");
30 ABSL_FLAG(bool, presolve, false, "Presolve loaded file.");
31 ABSL_FLAG(bool, statistics, false, "Print model statistics");
32 
33 namespace operations_research {
34 namespace fz {
35 void ParseFile(const std::string& filename, bool presolve) {
36  WallTimer timer;
37  timer.Start();
38 
39  FZLOG << "Loading " << filename << FZENDL;
40 
41  std::string problem_name = filename;
42  // Remove the .fzn extension.
43  CHECK(absl::EndsWith(problem_name, ".fzn"));
44  problem_name.resize(problem_name.size() - 4);
45  // Remove the leading path if present.
46  const size_t found = problem_name.find_last_of("/\\");
47  if (found != std::string::npos) {
48  problem_name = problem_name.substr(found + 1);
49  }
50  FZLOG << " - parsed in " << timer.GetInMs() << " ms" << FZENDL;
51 
52  Model model(problem_name);
53  CHECK(ParseFlatzincFile(filename, &model));
54  if (presolve) {
55  FZLOG << "Presolve model" << FZENDL;
56  timer.Reset();
57  timer.Start();
58  Presolver presolve;
59  presolve.Run(&model);
60  FZLOG << " - done in " << timer.GetInMs() << " ms" << FZENDL;
61  }
62  if (absl::GetFlag(FLAGS_statistics)) {
63  ModelStatistics stats(model);
64  stats.BuildStatistics();
65  stats.PrintStatistics();
66  }
67  if (absl::GetFlag(FLAGS_print)) {
68  FZLOG << model.DebugString() << FZENDL;
69  }
70 }
71 } // namespace fz
72 } // namespace operations_research
73 
74 int main(int argc, char** argv) {
75  const char kUsage[] =
76  "Parses a flatzinc .fzn file, optionally presolve it, and prints it in "
77  "human-readable format";
78  absl::SetFlag(&FLAGS_log_prefix, false);
79  absl::SetFlag(&FLAGS_logtostderr, true);
80  absl::SetProgramUsageMessage(kUsage);
81  absl::ParseCommandLine(argc, argv);
83  operations_research::fz::ParseFile(absl::GetFlag(FLAGS_file),
84  absl::GetFlag(FLAGS_presolve));
85  return 0;
86 }
operations_research::fz::ParseFile
void ParseFile(const std::string &filename, bool presolve)
Definition: parser_main.cc:35
FZENDL
#define FZENDL
Definition: flatzinc/logging.h:31
model.h
operations_research::fz::Model
Definition: flatzinc/model.h:315
operations_research
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operations_research::fz::Presolver::Run
void Run(Model *model)
Definition: presolve.cc:450
logging.h
FZLOG
#define FZLOG
Definition: flatzinc/logging.h:32
ABSL_FLAG
ABSL_FLAG(std::string, file, "", "Input file in the flatzinc format.")
WallTimer::Start
void Start()
Definition: timer.h:31
timer.h
WallTimer
Definition: timer.h:23
presolve.h
WallTimer::Reset
void Reset()
Definition: timer.h:26
model
GRBmodel * model
Definition: gurobi_interface.cc:269
WallTimer::GetInMs
int64 GetInMs() const
Definition: timer.h:46
parser.h
operations_research::fz::ModelStatistics::PrintStatistics
void PrintStatistics() const
Definition: model.cc:920
operations_research::fz::ModelStatistics::BuildStatistics
void BuildStatistics()
Definition: model.cc:933
file
Definition: file.cc:141
main
int main(int argc, char **argv)
Definition: parser_main.cc:74
operations_research::fz::ParseFlatzincFile
bool ParseFlatzincFile(const std::string &filename, Model *model)
Definition: parser.cc:38
operations_research::fz::Presolver
Definition: presolve.h:34
CHECK
#define CHECK(condition)
Definition: base/logging.h:495
commandlineflags.h
google::InitGoogleLogging
void InitGoogleLogging(const char *argv0)
Definition: base/logging.cc:1867
operations_research::fz::ModelStatistics
Definition: flatzinc/model.h:390