tools/llvm-readobj/Error.cpp

   1 //===- Error.cpp - system_error extensions for llvm-readobj -----*- C++ -*-===//
   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 // This defines a new error_category for the llvm-readobj tool.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "Error.h"
  14 #include "llvm/Support/ErrorHandling.h"
  15
  16 using namespace llvm;
  17
  18 namespace {
  19 // FIXME: This class is only here to support the transition to llvm::Error. It
  20 // will be removed once this transition is complete. Clients should prefer to
  21 // deal with the Error value directly, rather than converting to error_code.
  22 class _readobj_error_category : public std::error_category {
  23 public:
  24   const char* name() const noexcept override;
  25   std::string message(int ev) const override;
  26 };
  27 } // namespace
  28
  29 const char *_readobj_error_category::name() const noexcept {
  30   return "llvm.readobj";
  31 }
  32
  33 std::string _readobj_error_category::message(int EV) const {
  34   switch (static_cast<readobj_error>(EV)) {
  35   case readobj_error::success: return "Success";
  36   case readobj_error::file_not_found:
  37     return "No such file.";
  38   case readobj_error::unsupported_file_format:
  39     return "The file was not recognized as a valid object file.";
  40   case readobj_error::unrecognized_file_format:
  41     return "Unrecognized file type.";
  42   case readobj_error::unsupported_obj_file_format:
  43     return "Unsupported object file format.";
  44   case readobj_error::unknown_symbol:
  45     return "Unknown symbol.";
  46   }
  47   llvm_unreachable("An enumerator of readobj_error does not have a message "
  48                    "defined.");
  49 }
  50
  51 namespace llvm {
  52 const std::error_category &readobj_category() {
  53   static _readobj_error_category o;
  54   return o;
  55 }
  56 } // namespace llvm