[libc-commits] [libc] [libc] wcsncat implementation (PR #142431)

[Michael Jones via libc-commits]

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@@ -0,0 +1,32 @@
+//===-- Implementation of wcsncat -----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/wchar/wcsncat.h"
+
+#include "hdr/types/size_t.h"
+#include "hdr/types/wchar_t.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+#include "src/string/string_utils.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(wchar_t *, wcsncat,
+                   (wchar_t *__restrict s1, const wchar_t *__restrict s2,
+                    size_t n)) {
+  size_t size = internal::string_length(s1);
+  size_t i = 0;
+  for (; s2[i] && i < n; ++i) {
+    s1[size + i] = s2[i];
+  }
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michaelrj-google wrote:

nit: this loop doesn't need braces

https://github.com/llvm/llvm-project/pull/142431