blob: a00ba9979a489be112a8396260e9355c2a48fbc0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
//===-- Implementation of wcspbrk -----------------------------------------===//
//
// 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/wcspbrk.h"
#include "hdr/types/wchar_t.h"
#include "src/__support/common.h"
#include "src/__support/macros/null_check.h"
namespace LIBC_NAMESPACE_DECL {
bool contains_char(const wchar_t *str, wchar_t target) {
for (; *str != L'\0'; str++)
if (*str == target)
return true;
return false;
}
LLVM_LIBC_FUNCTION(const wchar_t *, wcspbrk,
(const wchar_t *src, const wchar_t *breakset)) {
LIBC_CRASH_ON_NULLPTR(src);
LIBC_CRASH_ON_NULLPTR(breakset);
// currently O(n * m), can be further optimized to O(n + m) with a hash set
for (int src_idx = 0; src[src_idx] != 0; src_idx++)
if (contains_char(breakset, src[src_idx]))
return src + src_idx;
return nullptr;
}
} // namespace LIBC_NAMESPACE_DECL
|
