1 //===-- Implementation of strlcpy -----------------------------------------===//
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/strlcpy.h"
10 #include "src/string/bzero.h"
11 #include "src/string/memory_utils/memcpy_implementations.h"
12 #include "src/string/memory_utils/memset_implementations.h"
13 #include "src/string/string_utils.h"
14 
15 #include "src/__support/common.h"
16 
17 namespace __llvm_libc {
18 
19 LLVM_LIBC_FUNCTION(size_t, strlcpy,
20                    (char *__restrict dst, const char *__restrict src,
21                     size_t size)) {
22   size_t len = internal::string_length(src);
23   if (!size)
24     return len;
25   size_t n = len < size - 1 ? len : size - 1;
26   inline_memcpy(dst, src, n);
27   inline_memset(dst + n, 0, size - n);
28   return len;
29 }
30 
31 } // namespace __llvm_libc
32