reader.h

// Copyright 2024 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
 
#pragma once
 
#include <cstring>
#include <memory>
#include <optional>
#include <string_view>
#include <variant>
#include <vector>
 
#include "pw_bytes/span.h"
#include "pw_elf/internal/reader_impl.h"
#include "pw_result/result.h"
#include "pw_status/status.h"
#include "pw_status/try.h"
#include "pw_stream/stream.h"
 
namespace pw::elf {
 
class ElfReader {
 public:
  static Result<ElfReader> FromStream(stream::SeekableReader& stream);
 
  stream::SeekableReader& stream() const {
    return std::visit([](auto&& impl) -> auto& { return impl.stream(); },
                      impl_);
  }
 
  StatusWithSize SeekToSection(std::string_view name) {
    return std::visit([name](auto&& impl) { return impl.SeekToSection(name); },
                      impl_);
  }
 
  Result<std::vector<std::byte>> ReadSection(std::string_view name);
 
 private:
  internal::ElfReaderImpls impl_;
 
  ElfReader(internal::ElfReaderImpls&& impl) : impl_(std::move(impl)) {}
};
 
}  // namespace pw::elf