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/__support/macros/config.h" 11 #include "src/string/string_utils.h" 12 13 #include "src/__support/common.h" 14 #include <stddef.h> 15 16 namespace LIBC_NAMESPACE_DECL { 17 18 LLVM_LIBC_FUNCTION(size_t, strnlen, (const char *src, size_t n)) { 19 const void *temp = internal::find_first_character( 20 reinterpret_cast<const unsigned char *>(src), '\0', n); 21 return temp ? reinterpret_cast<const char *>(temp) - src : n; 22 } 23 24 } // namespace LIBC_NAMESPACE_DECL 25