1//===-- Implementation of wcspbrk -----------------------------------------===//
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/wchar/wcspbrk.h"
10
11#include "hdr/types/wchar_t.h"
12#include "src/__support/common.h"
13#include "src/__support/macros/null_check.h"
14
15namespace LIBC_NAMESPACE_DECL {
16
17bool contains_char(const wchar_t *str, wchar_t target) {
18 for (; *str != L'\0'; str++)
19 if (*str == target)
20 return true;
21
22 return false;
23}
24
25LLVM_LIBC_FUNCTION(const wchar_t *, wcspbrk,
26 (const wchar_t *src, const wchar_t *breakset)) {
27 LIBC_CRASH_ON_NULLPTR(src);
28 LIBC_CRASH_ON_NULLPTR(breakset);
29
30 // currently O(n * m), can be further optimized to O(n + m) with a hash set
31 for (int src_idx = 0; src[src_idx] != 0; src_idx++)
32 if (contains_char(breakset, src[src_idx]))
33 return src + src_idx;
34
35 return nullptr;
36}
37
38} // namespace LIBC_NAMESPACE_DECL
39

source code of libc/src/wchar/wcspbrk.cpp