1*71db0c75SAndroid Build Coastguard Worker //===-- Implementation of swab --------------------------------------------===// 2*71db0c75SAndroid Build Coastguard Worker // 3*71db0c75SAndroid Build Coastguard Worker // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*71db0c75SAndroid Build Coastguard Worker // See https://llvm.org/LICENSE.txt for license information. 5*71db0c75SAndroid Build Coastguard Worker // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*71db0c75SAndroid Build Coastguard Worker // 7*71db0c75SAndroid Build Coastguard Worker //===----------------------------------------------------------------------===// 8*71db0c75SAndroid Build Coastguard Worker 9*71db0c75SAndroid Build Coastguard Worker #include "src/unistd/swab.h" 10*71db0c75SAndroid Build Coastguard Worker 11*71db0c75SAndroid Build Coastguard Worker #include "src/__support/common.h" 12*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/config.h" 13*71db0c75SAndroid Build Coastguard Worker 14*71db0c75SAndroid Build Coastguard Worker namespace LIBC_NAMESPACE_DECL { 15*71db0c75SAndroid Build Coastguard Worker 16*71db0c75SAndroid Build Coastguard Worker LLVM_LIBC_FUNCTION(void, swab, 17*71db0c75SAndroid Build Coastguard Worker (const void *__restrict from, void *__restrict to, 18*71db0c75SAndroid Build Coastguard Worker ssize_t n)) { 19*71db0c75SAndroid Build Coastguard Worker const unsigned char *f = static_cast<const unsigned char *>(from); 20*71db0c75SAndroid Build Coastguard Worker unsigned char *t = static_cast<unsigned char *>(to); 21*71db0c75SAndroid Build Coastguard Worker for (ssize_t i = 1; i < n; i += 2) { 22*71db0c75SAndroid Build Coastguard Worker t[i - 1] = f[i]; 23*71db0c75SAndroid Build Coastguard Worker t[i] = f[i - 1]; 24*71db0c75SAndroid Build Coastguard Worker } 25*71db0c75SAndroid Build Coastguard Worker } 26*71db0c75SAndroid Build Coastguard Worker 27*71db0c75SAndroid Build Coastguard Worker } // namespace LIBC_NAMESPACE_DECL 28