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 #include "src/__support/macros/config.h"
  13
  14 namespace LIBC_NAMESPACE_DECL {
  15
  16 LLVM_LIBC_FUNCTION(int, iscntrl, (int c)) {
  17   const unsigned ch = static_cast<unsigned>(c);
  18   return static_cast<int>(ch < 0x20 || ch == 0x7f);
  19 }
  20
  21 } // namespace LIBC_NAMESPACE_DECL