TypeFormat.h

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//===-- TypeFormat.h ----------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//
 
#ifndef LLDB_DATAFORMATTERS_TYPEFORMAT_H
#define LLDB_DATAFORMATTERS_TYPEFORMAT_H
 
#include <functional>
#include <string>
#include <unordered_map>
 
 
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-public.h"
 
#include "lldb/ValueObject/ValueObject.h"
 
namespace lldb_private {
class TypeFormatImpl {
public:
  class Flags {
  public:
    Flags() {}
 
    Flags(const Flags &other) : m_flags(other.m_flags) {}
 
    Flags(uint32_t value) : m_flags(value) {}
 
    Flags &operator=(const Flags &rhs) {
      if (&rhs != this)
        m_flags = rhs.m_flags;
 
      return *this;
    }
 
    Flags &operator=(const uint32_t &rhs) {
      m_flags = rhs;
      return *this;
    }
 
    Flags &Clear() {
      m_flags = 0;
      return *this;
    }
 
    bool GetCascades() const {
      return (m_flags & lldb::eTypeOptionCascade) == lldb::eTypeOptionCascade;
    }
 
    Flags &SetCascades(bool value = true) {
      if (value)
        m_flags |= lldb::eTypeOptionCascade;
      else
        m_flags &= ~lldb::eTypeOptionCascade;
      return *this;
    }
 
    bool GetSkipPointers() const {
      return (m_flags & lldb::eTypeOptionSkipPointers) ==
             lldb::eTypeOptionSkipPointers;
    }
 
    Flags &SetSkipPointers(bool value = true) {
      if (value)
        m_flags |= lldb::eTypeOptionSkipPointers;
      else
        m_flags &= ~lldb::eTypeOptionSkipPointers;
      return *this;
    }
 
    bool GetSkipReferences() const {
      return (m_flags & lldb::eTypeOptionSkipReferences) ==
             lldb::eTypeOptionSkipReferences;
    }
 
    Flags &SetSkipReferences(bool value = true) {
      if (value)
        m_flags |= lldb::eTypeOptionSkipReferences;
      else
        m_flags &= ~lldb::eTypeOptionSkipReferences;
      return *this;
    }
 
    bool GetNonCacheable() const {
      return (m_flags & lldb::eTypeOptionNonCacheable) ==
             lldb::eTypeOptionNonCacheable;
    }
 
    Flags &SetNonCacheable(bool value = true) {
      if (value)
        m_flags |= lldb::eTypeOptionNonCacheable;
      else
        m_flags &= ~lldb::eTypeOptionNonCacheable;
      return *this;
    }
 
    uint32_t GetValue() { return m_flags; }
 
    void SetValue(uint32_t value) { m_flags = value; }
 
  private:
    uint32_t m_flags = lldb::eTypeOptionCascade;
  };
 
  TypeFormatImpl(const Flags &flags = Flags());
 
  typedef std::shared_ptr<TypeFormatImpl> SharedPointer;
 
  virtual ~TypeFormatImpl();
 
  bool Cascades() const { return m_flags.GetCascades(); }
 
  bool SkipsPointers() const { return m_flags.GetSkipPointers(); }
 
  bool SkipsReferences() const { return m_flags.GetSkipReferences(); }
 
  bool NonCacheable() const { return m_flags.GetNonCacheable(); }
 
  void SetCascades(bool value) { m_flags.SetCascades(value); }
 
  void SetSkipsPointers(bool value) { m_flags.SetSkipPointers(value); }
 
  void SetSkipsReferences(bool value) { m_flags.SetSkipReferences(value); }
 
  void SetNonCacheable(bool value) { m_flags.SetNonCacheable(value); }
 
  uint32_t GetOptions() { return m_flags.GetValue(); }
 
  void SetOptions(uint32_t value) { m_flags.SetValue(value); }
 
  uint32_t &GetRevision() { return m_my_revision; }
 
  enum class Type { eTypeUnknown, eTypeFormat, eTypeEnum };
 
  virtual Type GetType() { return Type::eTypeUnknown; }
 
  // we are using a ValueObject* instead of a ValueObjectSP because we do not
  // need to hold on to this for extended periods of time and we trust the
  // ValueObject to stay around for as long as it is required for us to
  // generate its value
  virtual bool FormatObject(ValueObject *valobj, std::string &dest) const = 0;
 
  virtual std::string GetDescription() = 0;
 
protected:
  Flags m_flags;
  uint32_t m_my_revision = 0;
 
private:
  TypeFormatImpl(const TypeFormatImpl &) = delete;
  const TypeFormatImpl &operator=(const TypeFormatImpl &) = delete;
};
 
class TypeFormatImpl_Format : public TypeFormatImpl {
public:
  TypeFormatImpl_Format(lldb::Format f = lldb::eFormatInvalid,
                        const TypeFormatImpl::Flags &flags = Flags());
 
  typedef std::shared_ptr<TypeFormatImpl_Format> SharedPointer;
 
  ~TypeFormatImpl_Format() override;
 
  lldb::Format GetFormat() const { return m_format; }
 
  void SetFormat(lldb::Format fmt) { m_format = fmt; }
 
  TypeFormatImpl::Type GetType() override {
    return TypeFormatImpl::Type::eTypeFormat;
  }
 
  bool FormatObject(ValueObject *valobj, std::string &dest) const override;
 
  std::string GetDescription() override;
 
protected:
  lldb::Format m_format;
 
private:
  TypeFormatImpl_Format(const TypeFormatImpl_Format &) = delete;
  const TypeFormatImpl_Format &
  operator=(const TypeFormatImpl_Format &) = delete;
};
 
class TypeFormatImpl_EnumType : public TypeFormatImpl {
public:
  TypeFormatImpl_EnumType(ConstString type_name = ConstString(""),
                          const TypeFormatImpl::Flags &flags = Flags());
 
  typedef std::shared_ptr<TypeFormatImpl_EnumType> SharedPointer;
 
  ~TypeFormatImpl_EnumType() override;
 
  ConstString GetTypeName() { return m_enum_type; }
 
  void SetTypeName(ConstString enum_type) { m_enum_type = enum_type; }
 
  TypeFormatImpl::Type GetType() override {
    return TypeFormatImpl::Type::eTypeEnum;
  }
 
  bool FormatObject(ValueObject *valobj, std::string &dest) const override;
 
  std::string GetDescription() override;
 
protected:
  ConstString m_enum_type;
  mutable std::unordered_map<void *, CompilerType> m_types;
 
private:
  TypeFormatImpl_EnumType(const TypeFormatImpl_EnumType &) = delete;
  const TypeFormatImpl_EnumType &
  operator=(const TypeFormatImpl_EnumType &) = delete;
};
} // namespace lldb_private
 
#endif // LLDB_DATAFORMATTERS_TYPEFORMAT_H