Add 'third_party/abseil_cpp/' from commit '768eb2ca28'

git-subtree-dir: third_party/abseil_cpp
git-subtree-mainline: ffb2ae54be
git-subtree-split: 768eb2ca28

third_party/abseil_cpp/absl/strings/match.cc

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+// Copyright 2017 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/strings/match.h"
+
+#include "absl/strings/internal/memutil.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2) {
+  return (piece1.size() == piece2.size() &&
+          0 == absl::strings_internal::memcasecmp(piece1.data(), piece2.data(),
+                                                  piece1.size()));
+  // memcasecmp uses absl::ascii_tolower().
+}
+
+bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix) {
+  return (text.size() >= prefix.size()) &&
+         EqualsIgnoreCase(text.substr(0, prefix.size()), prefix);
+}
+
+bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix) {
+  return (text.size() >= suffix.size()) &&
+         EqualsIgnoreCase(text.substr(text.size() - suffix.size()), suffix);
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl