1//===------------------------- typeinfo.cpp -------------------------------===//
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#include <string.h>
13
14int std::type_info::__compare(const type_info &__rhs) const _NOEXCEPT {
15  if (&__data == &__rhs.__data)
16    return 0;
17  return strcmp(&__data.__decorated_name[1], &__rhs.__data.__decorated_name[1]);
18}
19
20const char *std::type_info::name() const _NOEXCEPT {
21  // TODO(compnerd) cache demangled &__data.__decorated_name[1]
22  return &__data.__decorated_name[1];
23}
24
25size_t std::type_info::hash_code() const _NOEXCEPT {
26#if defined(_WIN64)
27  constexpr size_t fnv_offset_basis = 14695981039346656037ull;
28  constexpr size_t fnv_prime = 10995116282110ull;
29#else
30  constexpr size_t fnv_offset_basis = 2166136261ull;
31  constexpr size_t fnv_prime = 16777619ull;
32#endif
33
34  size_t value = fnv_offset_basis;
35  for (const char* c = &__data.__decorated_name[1]; *c; ++c) {
36    value ^= static_cast<size_t>(static_cast<unsigned char>(*c));
37    value *= fnv_prime;
38  }
39
40#if defined(_WIN64)
41  value ^= value >> 32;
42#endif
43
44  return value;
45}
46#endif // _LIBCPP_ABI_MICROSOFT
47
48// FIXME: Remove the _LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY configuration.
49#if (!defined(LIBCXX_BUILDING_LIBCXXABI) &&               \
50     !defined(LIBCXXRT) &&                                \
51     !defined(__GLIBCXX__) &&                             \
52     !defined(_LIBCPP_ABI_VCRUNTIME)) ||                  \
53    defined(_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY)
54std::type_info::~type_info()
55{
56}
57#endif
58