195ca2e2cSCaslyn Tonelli //===-- Implementation of swab --------------------------------------------===// 295ca2e2cSCaslyn Tonelli // 395ca2e2cSCaslyn Tonelli // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 495ca2e2cSCaslyn Tonelli // See https://llvm.org/LICENSE.txt for license information. 595ca2e2cSCaslyn Tonelli // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 695ca2e2cSCaslyn Tonelli // 795ca2e2cSCaslyn Tonelli //===----------------------------------------------------------------------===// 895ca2e2cSCaslyn Tonelli 995ca2e2cSCaslyn Tonelli #include "src/unistd/swab.h" 1095ca2e2cSCaslyn Tonelli 1195ca2e2cSCaslyn Tonelli #include "src/__support/common.h" 12*5ff3ff33SPetr Hosek #include "src/__support/macros/config.h" 1395ca2e2cSCaslyn Tonelli 14*5ff3ff33SPetr Hosek namespace LIBC_NAMESPACE_DECL { 1595ca2e2cSCaslyn Tonelli 1695ca2e2cSCaslyn Tonelli LLVM_LIBC_FUNCTION(void, swab, 1795ca2e2cSCaslyn Tonelli (const void *__restrict from, void *__restrict to, 1895ca2e2cSCaslyn Tonelli ssize_t n)) { 1995ca2e2cSCaslyn Tonelli const unsigned char *f = static_cast<const unsigned char *>(from); 2095ca2e2cSCaslyn Tonelli unsigned char *t = static_cast<unsigned char *>(to); 2195ca2e2cSCaslyn Tonelli for (ssize_t i = 1; i < n; i += 2) { 2295ca2e2cSCaslyn Tonelli t[i - 1] = f[i]; 2395ca2e2cSCaslyn Tonelli t[i] = f[i - 1]; 2495ca2e2cSCaslyn Tonelli } 2595ca2e2cSCaslyn Tonelli } 2695ca2e2cSCaslyn Tonelli 27*5ff3ff33SPetr Hosek } // namespace LIBC_NAMESPACE_DECL 28