libc/src/ctype/toupper.cpp

   1 //===-- Implementation of toupper------------------------------------------===//
   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/toupper.h"
  10 #include "src/__support/ctype_utils.h"
  11
  12 #include "src/__support/common.h"
  13
  14 namespace __llvm_libc {
  15
  16 // TODO: Currently restricted to default locale.
  17 // These should be extended using locale information.
  18 LLVM_LIBC_FUNCTION(int, toupper, (int c)) {
  19   if (internal::islower(c))
  20     return c - ('a' - 'A');
  21   return c;
  22 }
  23
  24 } // namespace __llvm_libc