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 #include "src/__support/macros/config.h"
  14
  15 namespace LIBC_NAMESPACE_DECL {
  16
  17 LLVM_LIBC_FUNCTION(int, toupper, (int c)) {
  18   if (internal::islower(c))
  19     return c - ('a' - 'A');
  20   return c;
  21 }
  22
  23 } // namespace LIBC_NAMESPACE_DECL