1 // Copyright 2017 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "absl/strings/match.h"
16
17 #include "absl/strings/internal/memutil.h"
18
19 namespace absl {
20 ABSL_NAMESPACE_BEGIN
21
EqualsIgnoreCase(absl::string_view piece1,absl::string_view piece2)22 bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2) {
23 return (piece1.size() == piece2.size() &&
24 0 == absl::strings_internal::memcasecmp(piece1.data(), piece2.data(),
25 piece1.size()));
26 // memcasecmp uses absl::ascii_tolower().
27 }
28
StartsWithIgnoreCase(absl::string_view text,absl::string_view prefix)29 bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix) {
30 return (text.size() >= prefix.size()) &&
31 EqualsIgnoreCase(text.substr(0, prefix.size()), prefix);
32 }
33
EndsWithIgnoreCase(absl::string_view text,absl::string_view suffix)34 bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix) {
35 return (text.size() >= suffix.size()) &&
36 EqualsIgnoreCase(text.substr(text.size() - suffix.size()), suffix);
37 }
38
39 ABSL_NAMESPACE_END
40 } // namespace absl
41