/**
 * This file defines interfaces of a dummy library used to test various
 * features of the thunk generator.
 */
#pragma once

#include <cstdint>

extern "C" {

uint32_t GetDoubledValue(uint32_t);


/// Interfaces used to test opaque_type and assume_compatible_data_layout annotations

struct OpaqueType;

OpaqueType* MakeOpaqueType(uint32_t data);
uint32_t ReadOpaqueTypeData(OpaqueType*);
void DestroyOpaqueType(OpaqueType*);

union UnionType {
  uint32_t a;
  int32_t b;
  uint8_t c[4];
};

UnionType MakeUnionType(uint8_t a, uint8_t b, uint8_t c, uint8_t d);
uint32_t GetUnionTypeA(UnionType*);


/// Interfaces used to test automatic struct repacking

// A simple struct with data layout that differs between guest and host.
// The thunk generator should emit code that swaps the member data into
// correct position.
struct ReorderingType {
#if !defined(GUEST_THUNK_LIBRARY)
  uint32_t a;
  uint32_t b;
#else
  uint32_t b;
  uint32_t a;
#endif
};

ReorderingType MakeReorderingType(uint32_t a, uint32_t b);
uint32_t GetReorderingTypeMember(const ReorderingType*, int index);
void ModifyReorderingTypeMembers(ReorderingType* data);
uint32_t QueryOffsetOf(ReorderingType*, int index);

// Uses assume_compatible_data_layout to skip repacking
uint32_t GetReorderingTypeMemberWithoutRepacking(const ReorderingType*, int index);

/// Interfaces used to test assisted struct repacking

// We enable custom repacking on the "data" member, with repacking code that
// sets the first bit of "custom_repack_invoked" to 1 on entry.
struct CustomRepackedType {
  ReorderingType* data;
  int custom_repack_invoked;
};

// Should return true if the custom repacker set "custom_repack_invoked" to true
int RanCustomRepack(CustomRepackedType*);

/// Interface used to check that function arguments with different integer size
/// get forwarded correctly

#if !defined(GUEST_THUNK_LIBRARY)
enum DivType : uint8_t {};
#else
enum DivType : uint32_t {};
#endif
int FunctionWithDivergentSignature(DivType, DivType, DivType, DivType);
}