| 1 | //===-- Implementation of strncat -----------------------------------------===// |
|---|---|
| 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/strncat.h" |
| 10 | #include "src/string/string_utils.h" |
| 11 | #include "src/string/strncpy.h" |
| 12 | |
| 13 | #include "src/__support/common.h" |
| 14 | |
| 15 | namespace LIBC_NAMESPACE { |
| 16 | |
| 17 | LLVM_LIBC_FUNCTION(char *, strncat, |
| 18 | (char *__restrict dest, const char *__restrict src, |
| 19 | size_t count)) { |
| 20 | size_t src_length = internal::string_length(src); |
| 21 | size_t copy_amount = src_length > count ? count : src_length; |
| 22 | size_t dest_length = internal::string_length(src: dest); |
| 23 | LIBC_NAMESPACE::strncpy(dest: dest + dest_length, src, n: copy_amount); |
| 24 | dest[dest_length + copy_amount] = '\0'; |
| 25 | return dest; |
| 26 | } |
| 27 | |
| 28 | } // namespace LIBC_NAMESPACE |
| 29 |