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 __compare(const type_info & __rhs) const14int 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 name() const20const char *std::type_info::name() const noexcept { 21 // TODO(compnerd) cache demangled &__data.__decorated_name[1] 22 return &__data.__decorated_name[1]; 23 } 24 hash_code() const25size_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) ~type_info()54std::type_info::~type_info() 55 { 56 } 57 #endif 58