1 //===-- Implementation of strlcat -----------------------------------------===// 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/strlcat.h" 10 #include "src/__support/macros/config.h" 11 #include "src/string/string_utils.h" 12 13 #include "src/__support/common.h" 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 LLVM_LIBC_FUNCTION(size_t, strlcat, 18 (char *__restrict dst, const char *__restrict src, 19 size_t size)) { 20 char *new_dst = reinterpret_cast<char *>(internal::find_first_character( 21 reinterpret_cast<unsigned char *>(dst), 0, size)); 22 if (!new_dst) 23 return size + internal::string_length(src); 24 size_t first_len = new_dst - dst; 25 return first_len + internal::strlcpy(new_dst, src, size - first_len); 26 } 27 28 } // namespace LIBC_NAMESPACE_DECL 29