| //===------------------------- typeinfo.cpp -------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "typeinfo" |
| |
| #if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_ABI_VCRUNTIME) |
| #include <string.h> |
| |
| int std::type_info::__compare(const type_info &__rhs) const noexcept { |
| if (&__data == &__rhs.__data) |
| return 0; |
| return strcmp(&__data.__decorated_name[1], &__rhs.__data.__decorated_name[1]); |
| } |
| |
| const char *std::type_info::name() const noexcept { |
| // TODO(compnerd) cache demangled &__data.__decorated_name[1] |
| return &__data.__decorated_name[1]; |
| } |
| |
| size_t std::type_info::hash_code() const noexcept { |
| #if defined(_WIN64) |
| constexpr size_t fnv_offset_basis = 14695981039346656037ull; |
| constexpr size_t fnv_prime = 10995116282110ull; |
| #else |
| constexpr size_t fnv_offset_basis = 2166136261ull; |
| constexpr size_t fnv_prime = 16777619ull; |
| #endif |
| |
| size_t value = fnv_offset_basis; |
| for (const char* c = &__data.__decorated_name[1]; *c; ++c) { |
| value ^= static_cast<size_t>(static_cast<unsigned char>(*c)); |
| value *= fnv_prime; |
| } |
| |
| #if defined(_WIN64) |
| value ^= value >> 32; |
| #endif |
| |
| return value; |
| } |
| #endif // _LIBCPP_ABI_MICROSOFT |
| |
| // FIXME: Remove the _LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY configuration. |
| #if (!defined(LIBCXX_BUILDING_LIBCXXABI) && \ |
| !defined(LIBCXXRT) && \ |
| !defined(__GLIBCXX__) && \ |
| !defined(_LIBCPP_ABI_VCRUNTIME)) || \ |
| defined(_LIBCPP_BUILDING_HAS_NO_ABI_LIBRARY) |
| std::type_info::~type_info() |
| { |
| } |
| #endif |