106 lines
4.1 KiB
C++
106 lines
4.1 KiB
C++
// Copyright 2010-2017 Google
|
|
// 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.
|
|
|
|
#include "ortools/lp_data/model_reader.h"
|
|
|
|
#include "ortools/base/file.h"
|
|
#include "ortools/lp_data/mps_reader.h"
|
|
#include "ortools/lp_data/proto_utils.h"
|
|
#include "ortools/util/file_util.h"
|
|
|
|
namespace operations_research {
|
|
namespace glop {
|
|
|
|
bool LoadLinearProgramFromMps(const std::string& input_file_path,
|
|
const std::string& forced_mps_format,
|
|
LinearProgram* linear_program) {
|
|
LinearProgram linear_program_fixed;
|
|
LinearProgram linear_program_free;
|
|
MPSReader mps_reader;
|
|
mps_reader.set_log_errors(forced_mps_format == "free" ||
|
|
forced_mps_format == "fixed");
|
|
bool fixed_read = forced_mps_format != "free" &&
|
|
mps_reader.LoadFileWithMode(input_file_path, false,
|
|
&linear_program_fixed);
|
|
const bool free_read =
|
|
forced_mps_format != "fixed" &&
|
|
mps_reader.LoadFileWithMode(input_file_path, true, &linear_program_free);
|
|
if (!fixed_read && !free_read) {
|
|
LOG(ERROR) << "Error while parsing the mps file '" << input_file_path
|
|
<< "' Use the --forced_mps_format flags to see the errors.";
|
|
return false;
|
|
}
|
|
if (fixed_read && free_read) {
|
|
if (linear_program_fixed.name() != linear_program_free.name()) {
|
|
VLOG(1) << "Name of the model differs between fixed and free forms. "
|
|
<< "Fallbacking to free form.";
|
|
fixed_read = false;
|
|
}
|
|
}
|
|
if (!fixed_read) {
|
|
VLOG(1) << "Read file in free format.";
|
|
linear_program->PopulateFromLinearProgram(linear_program_free);
|
|
} else {
|
|
VLOG(1) << "Read file in fixed format.";
|
|
linear_program->PopulateFromLinearProgram(linear_program_fixed);
|
|
if (free_read) {
|
|
// TODO(user): Dump() take ages on large program, so we need an efficient
|
|
// comparison function between two linear programs. Using
|
|
// GetProblemStats() for now.
|
|
if (linear_program_free.GetProblemStats() !=
|
|
linear_program_fixed.GetProblemStats()) {
|
|
LOG(ERROR) << "Could not decide if '" << input_file_path
|
|
<< "' is in fixed or free format.";
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool LoadLinearProgramFromModelOrRequest(const std::string& input_file_path,
|
|
|
|
LinearProgram* linear_program) {
|
|
MPModelProto model_proto;
|
|
MPModelRequest request_proto;
|
|
ReadFileToProto(input_file_path, &model_proto);
|
|
ReadFileToProto(input_file_path, &request_proto);
|
|
// If the input proto is in binary format, both ReadFileToProto could return
|
|
// true. Instead use the actual number of variables found to test the
|
|
// correct format of the input.
|
|
const bool is_model_proto = model_proto.variable_size() > 0;
|
|
const bool is_request_proto = request_proto.model().variable_size() > 0;
|
|
if (!is_model_proto && !is_request_proto) {
|
|
LOG(ERROR) << "Failed to parse '" << input_file_path
|
|
<< "' as an MPModelProto or an MPModelRequest.";
|
|
return false;
|
|
} else {
|
|
if (is_model_proto && is_request_proto) {
|
|
LOG(ERROR) << input_file_path
|
|
<< " is parsing as both MPModelProto and MPModelRequest";
|
|
return false;
|
|
}
|
|
if (is_request_proto) {
|
|
VLOG(1) << "Read input proto as an MPModelRequest.";
|
|
model_proto.Swap(request_proto.mutable_model());
|
|
} else {
|
|
VLOG(1) << "Read input proto as an MPModelProto.";
|
|
}
|
|
}
|
|
MPModelProtoToLinearProgram(model_proto, linear_program);
|
|
return true;
|
|
}
|
|
|
|
} // namespace glop
|
|
} // namespace operations_research
|