1 //===-- Implementation of iscntrl------------------------------------------===// 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/ctype/iscntrl.h" 10 11 #include "src/__support/common.h" 12 13 namespace LIBC_NAMESPACE { 14 15 // TODO: Currently restricted to default locale. 16 // These should be extended using locale information. 17 LLVM_LIBC_FUNCTION(int, iscntrl, (int c)) { 18 const unsigned ch = static_cast<unsigned>(c); 19 return static_cast<int>(ch < 0x20 || ch == 0x7f); 20 } 21 22 } // namespace LIBC_NAMESPACE 23