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third_party/llvm/libc/src/string/memcmp.cpp
27 строк
1007 B
Constantine Tarasenkov
python3 utils/fetch_sources.py
04 сен 2021, 14:35
04 сен 2021, 14:35
4a0ab4c
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//===-- Implementation of memcmp ------------------------------------------===// // // 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 "src/string/memcmp.h" #include "src/__support/common.h" #include <stddef.h> // size_t namespace __llvm_libc { // TODO: It is a simple implementation, an optimized version is preparing. LLVM_LIBC_FUNCTION(int, memcmp, (const void *lhs, const void *rhs, size_t count)) { const unsigned char *_lhs = reinterpret_cast<const unsigned char *>(lhs); const unsigned char *_rhs = reinterpret_cast<const unsigned char *>(rhs); for (size_t i = 0; i < count; ++i) if (_lhs[i] != _rhs[i]) return _lhs[i] - _rhs[i]; // count is 0 or _lhs and _rhs are the same. return 0; } } // namespace __llvm_libc