DWARF/CompilationUnit.hpp

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/* Copyright 2022 - 2024 R. Thomas
 *
 * 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
 *
 *     http://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.
 */
#ifndef LIEF_DWARF_COMPILATION_UNIT_H
#define LIEF_DWARF_COMPILATION_UNIT_H
#include <memory>
#include <string>
#include <vector>
 
#include "LIEF/visibility.h"
#include "LIEF/range.hpp"
#include "LIEF/iterators.hpp"
#include "LIEF/DWARF/Function.hpp"
#include "LIEF/DWARF/Type.hpp"
 
namespace LIEF {
namespace dwarf {
 
namespace details {
class CompilationUnit;
class CompilationUnitIt;
}
class LIEF_API CompilationUnit {
  public:
  class LIEF_API Iterator {
    public:
    using iterator_category = std::bidirectional_iterator_tag;
    using value_type = std::unique_ptr<CompilationUnit>;
    using difference_type = std::ptrdiff_t;
    using pointer = CompilationUnit*;
    using reference = std::unique_ptr<CompilationUnit>&;
    using implementation = details::CompilationUnitIt;
 
    class LIEF_API PointerProxy {
      // Inspired from LLVM's iterator_facade_base
      friend class Iterator;
      public:
      pointer operator->() const { return R.get(); }
 
      private:
      value_type R;
 
      template <typename RefT>
      PointerProxy(RefT &&R) : R(std::forward<RefT>(R)) {} // NOLINT(bugprone-forwarding-reference-overload)
    };
 
    Iterator(const Iterator&);
    Iterator(Iterator&&) noexcept;
    Iterator(std::unique_ptr<details::CompilationUnitIt> impl);
    ~Iterator();
 
    friend LIEF_API bool operator==(const Iterator& LHS, const Iterator& RHS);
    friend LIEF_API bool operator!=(const Iterator& LHS, const Iterator& RHS) {
      return !(LHS == RHS);
    }
 
    Iterator& operator++();
    Iterator& operator--();
 
    Iterator operator--(int) {
      Iterator tmp = *static_cast<Iterator*>(this);
      --*static_cast<Iterator *>(this);
      return tmp;
    }
 
    Iterator operator++(int) {
      Iterator tmp = *static_cast<Iterator*>(this);
      ++*static_cast<Iterator *>(this);
      return tmp;
    }
 
    std::unique_ptr<CompilationUnit> operator*() const;
 
    PointerProxy operator->() const {
      return static_cast<const Iterator*>(this)->operator*();
    }
 
    private:
    std::unique_ptr<details::CompilationUnitIt> impl_;
  };
  using functions_it = iterator_range<Function::Iterator>;
  using types_it = iterator_range<Type::Iterator>;
  using vars_it = iterator_range<Variable::Iterator>;
  class Language {
    public:
    enum LANG : uint32_t {
      UNKNOWN = 0,
      C,
      CPP,
      RUST,
      DART,
      MODULA,
      FORTRAN,
      SWIFT,
      D,
      JAVA,
      COBOL,
    };
    LANG lang = UNKNOWN;
    uint32_t version = 0;
 
    Language() = default;
    Language(LANG lang, uint32_t version) :
      lang(lang), version(version)
    {}
    Language(LANG lang) :
      Language(lang, 0)
    {}
 
    Language(const Language&) = default;
    Language& operator=(const Language&) = default;
    Language(Language&&) = default;
    Language& operator=(Language&&) = default;
    ~Language() = default;
  };
  CompilationUnit(std::unique_ptr<details::CompilationUnit> impl);
  ~CompilationUnit();
  std::string name() const;
  std::string producer() const;
  std::string compilation_dir() const;
  Language language() const;
  uint64_t low_address() const;
  uint64_t high_address() const;
  uint64_t size() const;
  std::vector<range_t> ranges() const;
  std::unique_ptr<Function> find_function(const std::string& name) const;
  std::unique_ptr<Function> find_function(uint64_t addr) const;
  std::unique_ptr<Variable> find_variable(uint64_t addr) const;
  std::unique_ptr<Variable> find_variable(const std::string& name) const;
  functions_it functions() const;
  functions_it imported_functions() const;
  types_it types() const;
 
  vars_it variables() const;
 
  private:
  std::unique_ptr<details::CompilationUnit> impl_;
};

}