| 1 | //===-- Implementation of strndup -----------------------------------------===// |
|---|---|
| 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/strndup.h" |
| 10 | #include "src/string/memory_utils/inline_memcpy.h" |
| 11 | #include "src/string/string_utils.h" |
| 12 | |
| 13 | #include "src/__support/CPP/new.h" |
| 14 | #include "src/__support/common.h" |
| 15 | |
| 16 | #include <stddef.h> |
| 17 | |
| 18 | namespace LIBC_NAMESPACE { |
| 19 | |
| 20 | LLVM_LIBC_FUNCTION(char *, strndup, (const char *src, size_t size)) { |
| 21 | if (src == nullptr) |
| 22 | return nullptr; |
| 23 | size_t len = internal::string_length(src); |
| 24 | if (len > size) |
| 25 | len = size; |
| 26 | AllocChecker ac; |
| 27 | char *dest = new (ac) char[len + 1]; |
| 28 | if (!ac) |
| 29 | return nullptr; |
| 30 | inline_memcpy(dst: dest, src, count: len + 1); |
| 31 | dest[len] = '\0'; |
| 32 | return dest; |
| 33 | } |
| 34 | |
| 35 | } // namespace LIBC_NAMESPACE |
| 36 |