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1//===-- Implementation of strncpy -----------------------------------------===//
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/strncpy.h"
10
11#include "src/__support/common.h"
12#include <stddef.h> // For size_t.
13
14namespace LIBC_NAMESPACE {
15
16LLVM_LIBC_FUNCTION(char *, strncpy,
17(char *__restrict dest, const char *__restrict src,
18size_t n)) {
19size_t i = 0;
20// Copy up until \0 is found.
21for (; i < n && src[i] != '\0'; ++i)
22dest[i] = src[i];
23// When n>strlen(src), n-strlen(src) \0 are appended.
24for (; i < n; ++i)
25dest[i] = '\0';
26return dest;
27}
28
29} // namespace LIBC_NAMESPACE
30