typeinfo.cpp
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//===------------------------- 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