1 //===-- Implementation of strnlen------------------------------------------===//
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/string/strnlen.h"
10 #include "src/string/string_utils.h"
11 
12 #include "src/__support/common.h"
13 #include <stddef.h>
14 
15 namespace __llvm_libc {
16 
LLVM_LIBC_ENTRYPOINT(strnlen)17 size_t LLVM_LIBC_ENTRYPOINT(strnlen)(const char *src, size_t n) {
18   const void *temp = internal::find_first_character(
19       reinterpret_cast<const unsigned char *>(src), '\0', n);
20   return temp ? reinterpret_cast<const char *>(temp) - src : n;
21 }
22 
23 } // namespace __llvm_libc
24