1//===----------------------------------------------------------------------===//
 2//
 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4// See https://llvm.org/LICENSE.txt for license information.
 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6//
 7//===----------------------------------------------------------------------===//
 8
 9#include <typeinfo>
10
11#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_ABI_VCRUNTIME)
12
13#  include <string.h>
14
15int std::type_info::__compare(const type_info& __rhs) const noexcept {
16  if (&__data == &__rhs.__data)
17    return 0;
18  return strcmp(&__data.__decorated_name[1], &__rhs.__data.__decorated_name[1]);
19}
20
21const char* std::type_info::name() const noexcept {
22  // TODO(compnerd) cache demangled &__data.__decorated_name[1]
23  return &__data.__decorated_name[1];
24}
25
26size_t std::type_info::hash_code() const noexcept {
27#  if defined(_WIN64)
28  constexpr size_t fnv_offset_basis = 14695981039346656037ull;
29  constexpr size_t fnv_prime        = 10995116282110ull;
30#  else
31  constexpr size_t fnv_offset_basis = 2166136261ull;
32  constexpr size_t fnv_prime        = 16777619ull;
33#  endif
34
35  size_t value = fnv_offset_basis;
36  for (const char* c = &__data.__decorated_name[1]; *c; ++c) {
37    value ^= static_cast<size_t>(static_cast<unsigned char>(*c));
38    value *= fnv_prime;
39  }
40
41#  if defined(_WIN64)
42  value ^= value >> 32;
43#  endif
44
45  return value;
46}
47#endif // _LIBCPP_ABI_MICROSOFT
48
49// FIXME: Remove the _LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY configuration.
50#if (!defined(LIBCXX_BUILDING_LIBCXXABI) && !defined(LIBCXXRT) && !defined(__GLIBCXX__) &&                             \
51     !defined(_LIBCPP_ABI_VCRUNTIME)) ||                                                                               \
52    defined(_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY)
53std::type_info::~type_info() {}
54#endif