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more work on mps reader; follow include files renaming
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,122 @@ | ||
| // Copyright 2010-2022 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. | ||
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| #include "ortools/lp_data/mps_reader_template.h" | ||
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| #include <algorithm> | ||
| #include <cmath> | ||
| #include <cstdint> | ||
| #include <limits> | ||
| #include <string> | ||
| #include <vector> | ||
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| #include "absl/log/check.h" | ||
| #include "absl/status/status.h" | ||
| #include "absl/status/statusor.h" | ||
| #include "absl/strings/match.h" | ||
| #include "absl/strings/numbers.h" | ||
| #include "absl/strings/str_cat.h" | ||
| #include "absl/strings/str_split.h" | ||
| #include "absl/strings/string_view.h" | ||
| #include "absl/strings/strip.h" | ||
| #include "ortools/base/logging.h" | ||
| #include "ortools/base/status_macros.h" | ||
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| namespace operations_research::internal { | ||
| namespace { | ||
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| // Starting positions of each of the fields for fixed format. | ||
| static constexpr int kFieldStartPos[kNumMpsFields] = {1, 4, 14, 24, 39, 49}; | ||
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| // Lengths of each of the fields for fixed format. | ||
| static constexpr int kFieldLength[kNumMpsFields] = {2, 8, 8, 12, 8, 12}; | ||
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| // Positions where there should be spaces for fixed format. | ||
| static constexpr int kSpacePos[12] = {12, 13, 22, 23, 36, 37, | ||
| 38, 47, 48, 61, 62, 63}; | ||
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| } // namespace | ||
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| bool MPSLineInfo::IsFixedFormat() const { | ||
| constexpr int kMaxLineSize = | ||
| kFieldStartPos[kNumMpsFields - 1] + kFieldLength[kNumMpsFields - 1]; | ||
| // Note that `line_` already has been stripped of trailing white spaces. | ||
| const int line_size = line_.size(); | ||
| if (line_size > kMaxLineSize) return false; | ||
| for (const int i : kSpacePos) { | ||
| if (i >= line_size) break; | ||
| if (line_[i] != ' ') return false; | ||
| } | ||
| return true; | ||
| } | ||
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| absl::Status MPSLineInfo::SplitLineIntoFields(const MPSSectionId section) { | ||
| if (free_form_) { | ||
| absl::string_view remaining_line = absl::StripLeadingAsciiWhitespace(line_); | ||
| // Although using `fields_ = StrSplit(line, ByAnyChar(" \t))` is shorter to | ||
| // write, this explicit loop, and checking the `kNumMpsFields` is | ||
| // significantly faster. | ||
| while (!remaining_line.empty()) { | ||
| if (fields_.size() == kNumMpsFields) { | ||
| return InvalidArgumentError("Found too many fields."); | ||
| } | ||
| // find_first_of() returns npos for "not found". substr() interprets | ||
| // len==npos as end of string. | ||
| const int pos = remaining_line.find_first_of(" \t"); | ||
| fields_.push_back(remaining_line.substr(0, pos)); | ||
| if (pos == absl::string_view::npos) { | ||
| // substr() will throw an exception if the start is npos. | ||
| break; | ||
| } | ||
| remaining_line = | ||
| absl::StripLeadingAsciiWhitespace(remaining_line.substr(pos)); | ||
| } | ||
| } else { | ||
| // Note: the name should also comply with the fixed format guidelines | ||
| // (maximum 8 characters) but in practice there are many problem files in | ||
| // the netlib archive that are in fixed format and have a long name. We | ||
| // choose to ignore these cases and treat them as fixed format anyway. | ||
| if (section != MPSSectionId::kName && !IsFixedFormat()) { | ||
| return InvalidArgumentError("Line is not in fixed format."); | ||
| } | ||
| const int line_size = line_.size(); | ||
| for (int i = 0; i < kNumMpsFields; ++i) { | ||
| if (kFieldStartPos[i] >= line_size) break; | ||
| fields_.push_back(absl::StripTrailingAsciiWhitespace( | ||
| line_.substr(kFieldStartPos[i], kFieldLength[i]))); | ||
| } | ||
| } | ||
| return absl::OkStatus(); | ||
| } | ||
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| absl::string_view MPSLineInfo::GetFirstWord() const { | ||
| return line_.substr(0, line_.find(' ')); | ||
| } | ||
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| bool MPSLineInfo::IsCommentOrBlank() const { | ||
| // Trailing whitespace has already been trimmed, so a blank line has become | ||
| // empty. | ||
| return (line_.empty() || line_[0] == '*'); | ||
| } | ||
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| absl::Status MPSLineInfo::InvalidArgumentError( | ||
| absl::string_view error_message) const { | ||
| return AppendLineToError(absl::InvalidArgumentError(error_message)); | ||
| } | ||
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| absl::Status MPSLineInfo::AppendLineToError(const absl::Status& status) const { | ||
| return util::StatusBuilder(status).SetAppend() | ||
| << " Line " << line_num_ << ": \"" << line_ << "\"."; | ||
| } | ||
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| } // namespace operations_research::internal |
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