libc/src/ctype/iscntrl.cpp

   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 __llvm_libc {
  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 char ch = static_cast<unsigned char>(c);
  19   return static_cast<int>(ch < 0x20 || ch == 0x7f);
  20 }
  21
  22 } // namespace __llvm_libc