1 //===-- Implementation of isupper------------------------------------------===//
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/isupper.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 int LLVM_LIBC_ENTRYPOINT(isupper)(int c) {
18   const unsigned ch = c;
19   return (ch - 'A') < 26;
20 }
21 
22 } // namespace __llvm_libc
23