32 lines · cpp
1//===-- Implementation of wcsncat -----------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/wchar/wcsncat.h"10 11#include "hdr/types/size_t.h"12#include "hdr/types/wchar_t.h"13#include "src/__support/common.h"14#include "src/__support/macros/config.h"15#include "src/string/string_utils.h"16 17namespace LIBC_NAMESPACE_DECL {18 19LLVM_LIBC_FUNCTION(wchar_t *, wcsncat,20 (wchar_t *__restrict s1, const wchar_t *__restrict s2,21 size_t n)) {22 size_t size = internal::string_length(s1);23 size_t i = 0;24 for (; s2[i] && i < n; ++i)25 s1[size + i] = s2[i];26 // Appending null character to the end of the result.27 s1[size + i] = L'\0';28 return s1;29}30 31} // namespace LIBC_NAMESPACE_DECL32