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 15 int 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 21 const char* std::type_info::name() const noexcept { 22 // TODO(compnerd) cache demangled &__data.__decorated_name[1] 23 return &__data.__decorated_name[1]; 24 } 25 26 size_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) 53 std::type_info::~type_info() {} 54 #endif 55