1*71db0c75SAndroid Build Coastguard Worker //===-- Baremetal implementation of getchar -------------------------------===// 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/stdio/getchar.h" 10*71db0c75SAndroid Build Coastguard Worker #include "src/__support/OSUtil/io.h" 11*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/config.h" 12*71db0c75SAndroid Build Coastguard Worker 13*71db0c75SAndroid Build Coastguard Worker #include "hdr/stdio_macros.h" // for EOF. 14*71db0c75SAndroid Build Coastguard Worker 15*71db0c75SAndroid Build Coastguard Worker namespace LIBC_NAMESPACE_DECL { 16*71db0c75SAndroid Build Coastguard Worker 17*71db0c75SAndroid Build Coastguard Worker LLVM_LIBC_FUNCTION(int, getchar, ()) { 18*71db0c75SAndroid Build Coastguard Worker char buf[1]; 19*71db0c75SAndroid Build Coastguard Worker auto result = read_from_stdin(buf, sizeof(buf)); 20*71db0c75SAndroid Build Coastguard Worker if (result < 0) 21*71db0c75SAndroid Build Coastguard Worker return EOF; 22*71db0c75SAndroid Build Coastguard Worker return buf[0]; 23*71db0c75SAndroid Build Coastguard Worker } 24*71db0c75SAndroid Build Coastguard Worker 25*71db0c75SAndroid Build Coastguard Worker } // namespace LIBC_NAMESPACE_DECL 26