// Copyright 2016 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <fbl/intrusive_container_utils.h>
#include <fbl/tests/intrusive_containers/objects.h>
#include <zxtest/zxtest.h>

namespace fbl {
namespace tests {
namespace intrusive_containers {

size_t TestObjBase::live_obj_count_ = 0;

template <typename T>
void swap_test(const T initial_a, const T initial_b) {
  // Starting A and B need to be different in order for us to know that swap
  // worked.
  EXPECT_NE(::memcmp(&initial_a, &initial_b, sizeof(T)), 0);

  T a = initial_a;
  T b = initial_b;
  ::fbl::internal::Swap(a, b);

  EXPECT_EQ(::memcmp(&a, &initial_b, sizeof(T)), 0);
  EXPECT_EQ(::memcmp(&b, &initial_a, sizeof(T)), 0);
}

TEST(IntrusiveContainerUtilsTest, Swap) {
  struct SimpleSmallStruct {
    uint8_t a, b;
  };
  struct SimpleBigStruct {
    uint32_t a, b;
  };
  struct SimpleHugeStruct {
    uint64_t a, b;
  };

  swap_test<char>('a', 'b');
  swap_test<int8_t>(-5, 10);
  swap_test<uint8_t>(5, 10);
  swap_test<int16_t>(-12345, 12345);
  swap_test<uint16_t>(12345, 54321);
  swap_test<int32_t>(-1234567890, 123456789);
  swap_test<uint32_t>(1234567890, 987654321);
  swap_test<int64_t>(-12345678901234567, 12345678901234567);
  swap_test<uint64_t>(12345678901234567, 98765432109876543);
  swap_test<float>(-0.1234567f, 0.7654321f);
  swap_test<double>(-0.12345678901234567890, 0.98765432109876543210);
  swap_test<SimpleSmallStruct>({5, 4}, {2, 9});
  swap_test<SimpleBigStruct>({5, 4}, {2, 9});
#if TEST_WILL_NOT_COMPILE || 0
  swap_test<SimpleHugeStruct>({5, 4}, {2, 9});
#endif

  SimpleBigStruct a = {};
  SimpleBigStruct b = {};
  swap_test<void*>(&a, &b);
  swap_test<SimpleBigStruct*>(&a, &b);
}

}  // namespace intrusive_containers
}  // namespace tests
}  // namespace fbl