//===- Error.cpp - system_error extensions for Object -----------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// This defines a new error_category for the Object library.

//

//===----------------------------------------------------------------------===//

#include "llvm/Object/Error.h"

#include "llvm/ADT/Twine.h"

#include "llvm/Support/ErrorHandling.h"

using namespace llvm;

using namespace object;

namespace {

// FIXME: This class is only here to support the transition to llvm::Error. It

// will be removed once this transition is complete. Clients should prefer to

// deal with the Error value directly, rather than converting to error_code.

class _object_error_category : public std::error_category {

public:

  const char* name() const noexcept override;

  std::string message(int ev) const override;

};

}

const char *_object_error_category::name() const noexcept {

  return "llvm.object";

}

std::string _object_error_category::message(int EV) const {

  object_error E = static_cast<object_error>(EV);

  switch (E) {

  case object_error::arch_not_found:

    return "No object file for requested architecture";

  case object_error::invalid_file_type:

    return "The file was not recognized as a valid object file";

  case object_error::parse_failed:

    return "Invalid data was encountered while parsing the file";

  case object_error::unexpected_eof:

    return "The end of the file was unexpectedly encountered";

  case object_error::string_table_non_null_end:

    return "String table must end with a null terminator";

  case object_error::invalid_section_index:

    return "Invalid section index";

  case object_error::bitcode_section_not_found:

    return "Bitcode section not found in object file";

  case object_error::invalid_symbol_index:

    return "Invalid symbol index";

  case object_error::section_stripped:

    return "Section has been stripped from the object file";

  }

  llvm_unreachable("An enumerator of object_error does not have a message "

                   "defined.");

}

void BinaryError::anchor() {}

char BinaryError::ID = 0;

char GenericBinaryError::ID = 0;

GenericBinaryError::GenericBinaryError(const Twine &Msg) : Msg(Msg.str()) {}

GenericBinaryError::GenericBinaryError(const Twine &Msg,

                                       object_error ECOverride)

    : Msg(Msg.str()) {

  setErrorCode(make_error_code(ECOverride));

}

void GenericBinaryError::log(raw_ostream &OS) const {

  OS << Msg;

}

const std::error_category &object::object_category() {

  static _object_error_category error_category;

  return error_category;

}

llvm::Error llvm::object::isNotObjectErrorInvalidFileType(llvm::Error Err) {

  return handleErrors(std::move(Err), [](std::unique_ptr<ECError> M) -> Error {

    // Try to handle 'M'. If successful, return a success value from

    // the handler.

    if (M->convertToErrorCode() == object_error::invalid_file_type)

      return Error::success();

    // We failed to handle 'M' - return it from the handler.

    // This value will be passed back from catchErrors and

    // wind up in Err2, where it will be returned from this function.

    return Error(std::move(M));

  });

}