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// Copyright 2023 The Abseil Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/log/internal/fnmatch.h"
#include "absl/base/config.h"
#include "absl/strings/string_view.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace log_internal {
bool FNMatch(absl::string_view pattern, absl::string_view str) {
while (true) {
if (pattern.empty()) {
// `pattern` is exhausted; succeed if all of `str` was consumed matching
// it.
return str.empty();
}
if (str.empty()) {
// `str` is exhausted; succeed if `pattern` is empty or all '*'s.
return pattern.find_first_not_of('*') == pattern.npos;
}
if (pattern.front() == '*') {
pattern.remove_prefix(1);
if (pattern.empty()) return true;
do {
if (FNMatch(pattern, str)) return true;
str.remove_prefix(1);
} while (!str.empty());
return false;
}
if (pattern.front() == '?' || pattern.front() == str.front()) {
pattern.remove_prefix(1);
str.remove_prefix(1);
continue;
}
return false;
}
}
} // namespace log_internal
ABSL_NAMESPACE_END
} // namespace absl
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