1 //===-- Implementation of fgetc -------------------------------------------===// 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/fgetc.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, fgetc, (::FILE * stream)) { 20 unsigned char c; 21 auto result = reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->read(&c, 1); 22 size_t r = result.value; 23 if (result.has_error()) 24 libc_errno = result.error; 25 26 if (r != 1) 27 return EOF; 28 return c; 29 } 30 31 } // namespace LIBC_NAMESPACE_DECL 32