1 //===-- Implementation of putchar -----------------------------------------===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/stdio/putchar.h" 10 #include "src/__support/File/file.h" 11 12 #include "hdr/types/FILE.h" 13 #include "src/__support/macros/config.h" 14 #include "src/errno/libc_errno.h" 15 #include <stddef.h> 16 17 namespace LIBC_NAMESPACE_DECL { 18 19 LLVM_LIBC_FUNCTION(int, putchar, (int c)) { 20 unsigned char uc = static_cast<unsigned char>(c); 21 22 auto result = LIBC_NAMESPACE::stdout->write(&uc, 1); 23 if (result.has_error()) 24 libc_errno = result.error; 25 size_t written = result.value; 26 27 if (1 != written) { 28 // The stream should be in an error state in this case. 29 return EOF; 30 } 31 return 0; 32 } 33 34 } // namespace LIBC_NAMESPACE_DECL 35