28 lines · cpp
1//===-- Implementation of swab --------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/unistd/swab.h"10 11#include "src/__support/common.h"12#include "src/__support/macros/config.h"13 14namespace LIBC_NAMESPACE_DECL {15 16LLVM_LIBC_FUNCTION(void, swab,17 (const void *__restrict from, void *__restrict to,18 ssize_t n)) {19 const unsigned char *f = static_cast<const unsigned char *>(from);20 unsigned char *t = static_cast<unsigned char *>(to);21 for (ssize_t i = 1; i < n; i += 2) {22 t[i - 1] = f[i];23 t[i] = f[i - 1];24 }25}26 27} // namespace LIBC_NAMESPACE_DECL28