25 lines · cpp
1//===-- Implementation of isalnum------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/ctype/isalnum.h"10 11#include "src/__support/CPP/limits.h"12#include "src/__support/common.h"13#include "src/__support/ctype_utils.h"14#include "src/__support/macros/config.h"15 16namespace LIBC_NAMESPACE_DECL {17 18LLVM_LIBC_FUNCTION(int, isalnum, (int c)) {19 if (c < 0 || c > cpp::numeric_limits<unsigned char>::max())20 return 0;21 return static_cast<int>(internal::isalnum(static_cast<char>(c)));22}23 24} // namespace LIBC_NAMESPACE_DECL25