1/*
2 * Copyright 2015-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <folly/detail/RangeCommon.h>
18
19#include <bitset>
20
21#include <folly/container/SparseByteSet.h>
22
23namespace folly {
24
25namespace detail {
26
27size_t qfind_first_byte_of_bitset(
28 const StringPieceLite haystack,
29 const StringPieceLite needles) {
30 std::bitset<256> s;
31 for (auto needle : needles) {
32 s[(uint8_t)needle] = true;
33 }
34 for (size_t index = 0; index < haystack.size(); ++index) {
35 if (s[(uint8_t)haystack[index]]) {
36 return index;
37 }
38 }
39 return std::string::npos;
40}
41
42size_t qfind_first_byte_of_byteset(
43 const StringPieceLite haystack,
44 const StringPieceLite needles) {
45 SparseByteSet s;
46 for (auto needle : needles) {
47 s.add(uint8_t(needle));
48 }
49 for (size_t index = 0; index < haystack.size(); ++index) {
50 if (s.contains(uint8_t(haystack[index]))) {
51 return index;
52 }
53 }
54 return std::string::npos;
55}
56} // namespace detail
57} // namespace folly
58