github.com/johnnyeven/libtools@v0.0.0-20191126065708-61829c1adf46/third_party/mlir/lib/Support/FileUtilities.cpp (about)

     1  //===- FileUtilities.cpp - utilities for working with files ---------------===//
     2  //
     3  // Copyright 2019 The MLIR Authors.
     4  //
     5  // Licensed under the Apache License, Version 2.0 (the "License");
     6  // you may not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //   http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing, software
    12  // distributed under the License is distributed on an "AS IS" BASIS,
    13  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  // See the License for the specific language governing permissions and
    15  // limitations under the License.
    16  // =============================================================================
    17  //
    18  // Definitions of common utilities for working with files.
    19  //
    20  //===----------------------------------------------------------------------===//
    21  
    22  #include "mlir/Support/FileUtilities.h"
    23  #include "mlir/Support/LLVM.h"
    24  #include "llvm/Support/FileUtilities.h"
    25  #include "llvm/Support/MemoryBuffer.h"
    26  #include "llvm/Support/ToolOutputFile.h"
    27  
    28  using namespace mlir;
    29  
    30  std::unique_ptr<llvm::MemoryBuffer>
    31  mlir::openInputFile(StringRef inputFilename, std::string *errorMessage) {
    32    auto fileOrErr = llvm::MemoryBuffer::getFileOrSTDIN(inputFilename);
    33    if (std::error_code error = fileOrErr.getError()) {
    34      if (errorMessage)
    35        *errorMessage = "cannot open input file '" + inputFilename.str() +
    36                        "': " + error.message();
    37      return nullptr;
    38    }
    39  
    40    return std::move(*fileOrErr);
    41  }
    42  
    43  std::unique_ptr<llvm::ToolOutputFile>
    44  mlir::openOutputFile(StringRef outputFilename, std::string *errorMessage) {
    45    std::error_code error;
    46    auto result = std::make_unique<llvm::ToolOutputFile>(outputFilename, error,
    47                                                         llvm::sys::fs::F_None);
    48    if (error) {
    49      if (errorMessage)
    50        *errorMessage = "cannot open output file '" + outputFilename.str() +
    51                        "': " + error.message();
    52      return nullptr;
    53    }
    54  
    55    return result;
    56  }