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 }
57