mlir/lib/Support/FileUtilities.cpp

   1 //===- FileUtilities.cpp - utilities for working with files ---------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Definitions of common utilities for working with files.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "mlir/Support/FileUtilities.h"
  14 #include "mlir/Support/LLVM.h"
  15 #include "llvm/Support/Alignment.h"
  16 #include "llvm/Support/FileUtilities.h"
  17 #include "llvm/Support/MemoryBuffer.h"
  18 #include "llvm/Support/ToolOutputFile.h"
  19
  20 using namespace mlir;
  21
  22 static std::unique_ptr<llvm::MemoryBuffer>
  23 openInputFileImpl(StringRef inputFilename, std::string *errorMessage,
  24                   std::optional<llvm::Align> alignment) {
  25   auto fileOrErr = llvm::MemoryBuffer::getFileOrSTDIN(
  26       inputFilename, /*IsText=*/false, /*RequiresNullTerminator=*/true,
  27       alignment);
  28   if (std::error_code error = fileOrErr.getError()) {
  29     if (errorMessage)
  30       *errorMessage = "cannot open input file '" + inputFilename.str() +
  31                       "': " + error.message();
  32     return nullptr;
  33   }
  34
  35   return std::move(*fileOrErr);
  36 }
  37 std::unique_ptr<llvm::MemoryBuffer>
  38 mlir::openInputFile(StringRef inputFilename, std::string *errorMessage) {
  39   return openInputFileImpl(inputFilename, errorMessage,
  40                            /*alignment=*/std::nullopt);
  41 }
  42 std::unique_ptr<llvm::MemoryBuffer>
  43 mlir::openInputFile(llvm::StringRef inputFilename, llvm::Align alignment,
  44                     std::string *errorMessage) {
  45   return openInputFileImpl(inputFilename, errorMessage, alignment);
  46 }
  47
  48 std::unique_ptr<llvm::ToolOutputFile>
  49 mlir::openOutputFile(StringRef outputFilename, std::string *errorMessage) {
  50   std::error_code error;
  51   auto result = std::make_unique<llvm::ToolOutputFile>(outputFilename, error,
  52                                                        llvm::sys::fs::OF_None);
  53   if (error) {
  54     if (errorMessage)
  55       *errorMessage = "cannot open output file '" + outputFilename.str() +
  56                       "': " + error.message();
  57     return nullptr;
  58   }
  59
  60   return result;
  61 }