1 //===-- Implementation of fseek -------------------------------------------===// 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/fseek.h" 10 #include "src/__support/File/file.h" 11 12 #include "src/errno/libc_errno.h" 13 14 namespace LIBC_NAMESPACE { 15 16 LLVM_LIBC_FUNCTION(int, fseek, (::FILE * stream, long offset, int whence)) { 17 auto result = 18 reinterpret_cast<LIBC_NAMESPACE::File *>(stream)->seek(offset, whence); 19 if (!result.has_value()) { 20 libc_errno = result.error(); 21 return -1; 22 } 23 return 0; 24 } 25 26 } // namespace LIBC_NAMESPACE 27