OR-Tools  8.2
mps_reader.h
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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 // A reader for files in the MPS format.
15 // see http://lpsolve.sourceforge.net/5.5/mps-format.htm
16 // and http://www.ici.ro/camo/language/ml11.htm.
17 //
18 // MPS stands for Mathematical Programming System.
19 //
20 // The format was invented by IBM in the 60's, and has become the de facto
21 // standard. We developed this reader to be able to read benchmark data files.
22 // Using the MPS file format for new models is discouraged.
23 
24 #ifndef OR_TOOLS_LP_DATA_MPS_READER_H_
25 #define OR_TOOLS_LP_DATA_MPS_READER_H_
26 
27 #include <limits>
28 #include <memory>
29 #include <string>
30 #include <vector>
31 
32 #include "absl/container/flat_hash_map.h"
33 #include "absl/container/flat_hash_set.h"
34 #include "absl/container/node_hash_set.h"
35 #include "absl/flags/declare.h"
36 #include "absl/status/status.h"
37 #include "absl/status/statusor.h"
38 #include "absl/strings/numbers.h"
40 #include "ortools/base/hash.h"
41 #include "ortools/base/int_type.h"
42 #include "ortools/base/logging.h"
43 #include "ortools/base/macros.h" // for DISALLOW_COPY_AND_ASSIGN, NULL
44 #include "ortools/base/map_util.h"
47 #include "ortools/linear_solver/linear_solver.pb.h"
50 
51 namespace operations_research {
52 namespace glop {
53 
54 // Reads a linear program in the mps format.
55 //
56 // All Parse() methods clear the previously parsed instance and store the result
57 // in the given Data class.
58 
59 class MPSReader {
60  public:
61  enum Form { AUTO_DETECT, FREE, FIXED };
62 
63  // Parses instance from a file.
64  absl::Status ParseFile(const std::string& file_name, LinearProgram* data,
65  Form form = AUTO_DETECT);
66 
67  absl::Status ParseFile(const std::string& file_name, MPModelProto* data,
68  Form form = AUTO_DETECT);
69 };
70 
71 } // namespace glop
72 } // namespace operations_research
73 
74 #endif // OR_TOOLS_LP_DATA_MPS_READER_H_
absl::Status ParseFile(const std::string &file_name, LinearProgram *data, Form form=AUTO_DETECT)
Definition: mps_reader.cc:1038
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