libc/src/ctype/isxdigit.cpp

   1 //===-- Implementation of isxdigit-----------------------------------------===//
   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/isxdigit.h"
  10 #include "src/__support/ctype_utils.h"
  11
  12 #include "src/__support/common.h"
  13
  14 namespace LIBC_NAMESPACE {
  15
  16 // TODO: Currently restricted to default locale.
  17 // These should be extended using locale information.
  18 LLVM_LIBC_FUNCTION(int, isxdigit, (int c)) {
  19   const unsigned ch = static_cast<unsigned>(c);
  20   return static_cast<int>(internal::isdigit(ch) || (ch | 32) - 'a' < 6);
  21 }
  22
  23 } // namespace LIBC_NAMESPACE