a0b65a7bcd
Summary: The new macro also inserts the C alias for the C++ implementations without needing an objcopy based post processing step. The CMake rules have been updated to reflect this. More CMake cleanup can be taken up in future rounds and appropriate TODOs have been added for them. Reviewers: mcgrathr, sivachandra Subscribers:
28 lines
1007 B
C++
28 lines
1007 B
C++
//===-- Implementation of memcmp ------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "src/string/memcmp.h"
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#include "src/__support/common.h"
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#include <stddef.h> // size_t
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namespace __llvm_libc {
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// TODO: It is a simple implementation, an optimized version is preparing.
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LLVM_LIBC_FUNCTION(int, memcmp,
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(const void *lhs, const void *rhs, size_t count)) {
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const unsigned char *_lhs = reinterpret_cast<const unsigned char *>(lhs);
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const unsigned char *_rhs = reinterpret_cast<const unsigned char *>(rhs);
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for (size_t i = 0; i < count; ++i)
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if (_lhs[i] != _rhs[i])
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return _lhs[i] - _rhs[i];
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// count is 0 or _lhs and _rhs are the same.
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return 0;
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}
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} // namespace __llvm_libc
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