OR-Tools  8.2
parser_main.cc
Go to the documentation of this file.
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"
21#include "absl/flags/parse.h"
22#include "absl/flags/usage.h"
24#include "ortools/base/timer.h"
29
30ABSL_FLAG(std::string, file, "", "Input file in the flatzinc format.");
31ABSL_FLAG(bool, print, false, "Print model.");
32ABSL_FLAG(bool, presolve, false, "Presolve loaded file.");
33ABSL_FLAG(bool, statistics, false, "Print model statistics");
34
35namespace operations_research {
36namespace fz {
37void ParseFile(const std::string& filename, bool presolve) {
38 WallTimer timer;
39 timer.Start();
40
41 FZLOG << "Loading " << filename << FZENDL;
42
43 std::string problem_name = filename;
44 // Remove the .fzn extension.
45 CHECK(absl::EndsWith(problem_name, ".fzn"));
46 problem_name.resize(problem_name.size() - 4);
47 // Remove the leading path if present.
48 const size_t found = problem_name.find_last_of("/\\");
49 if (found != std::string::npos) {
50 problem_name = problem_name.substr(found + 1);
51 }
52 FZLOG << " - parsed in " << timer.GetInMs() << " ms" << FZENDL;
53
54 Model model(problem_name);
55 CHECK(ParseFlatzincFile(filename, &model));
56 if (presolve) {
57 FZLOG << "Presolve model" << FZENDL;
58 timer.Reset();
59 timer.Start();
60 Presolver presolve;
61 presolve.Run(&model);
62 FZLOG << " - done in " << timer.GetInMs() << " ms" << FZENDL;
63 }
64 if (absl::GetFlag(FLAGS_statistics)) {
66 stats.BuildStatistics();
67 stats.PrintStatistics();
68 }
69 if (absl::GetFlag(FLAGS_print)) {
70 FZLOG << model.DebugString() << FZENDL;
71 }
72}
73} // namespace fz
74} // namespace operations_research
75
76int main(int argc, char** argv) {
77 const char kUsage[] =
78 "Parses a flatzinc .fzn file, optionally presolve it, and prints it in "
79 "human-readable format";
80 absl::SetFlag(&FLAGS_log_prefix, false);
81 absl::SetFlag(&FLAGS_logtostderr, true);
82 absl::SetProgramUsageMessage(kUsage);
83 absl::ParseCommandLine(argc, argv);
85 operations_research::fz::ParseFile(absl::GetFlag(FLAGS_file),
86 absl::GetFlag(FLAGS_presolve));
87 return 0;
88}
#define CHECK(condition)
Definition: base/logging.h:495
void Start()
Definition: timer.h:31
void Reset()
Definition: timer.h:26
int64 GetInMs() const
Definition: timer.h:46
#define FZLOG
#define FZENDL
GRBmodel * model
Definition: file.cc:141
void InitGoogleLogging(const char *argv0)
void ParseFile(const std::string &filename, bool presolve)
Definition: parser_main.cc:37
bool ParseFlatzincFile(const std::string &filename, Model *model)
Definition: parser.cc:38
The vehicle routing library lets one model and solve generic vehicle routing problems ranging from th...
int main(int argc, char **argv)
Definition: parser_main.cc:76
ABSL_FLAG(std::string, file, "", "Input file in the flatzinc format.")