81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
//
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// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// -----------------------------------------------------------------------------
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// File: match.h
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// -----------------------------------------------------------------------------
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//
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// This file contains simple utilities for performing std::string matching checks.
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// All of these function parameters are specified as `absl::string_view`,
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// meaning that these functions can accept `std::string`, `absl::string_view` or
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// nul-terminated C-style strings.
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//
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// Examples:
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// std::string s = "foo";
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// absl::string_view sv = "f";
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// EXPECT_TRUE(absl::StrContains(s, sv));
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//
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// Note: The order of parameters in these functions is designed to mimic the
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// order an equivalent member function would exhibit;
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// e.g. `s.Contains(x)` ==> `absl::StrContains(s, x).
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#ifndef ABSL_STRINGS_MATCH_H_
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#define ABSL_STRINGS_MATCH_H_
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#include <cstring>
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#include "absl/strings/string_view.h"
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namespace absl {
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// StrContains()
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//
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// Returns whether a given std::string `s` contains the substring `x`.
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inline bool StrContains(absl::string_view s, absl::string_view x) {
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return static_cast<absl::string_view::size_type>(s.find(x, 0)) != s.npos;
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}
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// StartsWith()
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//
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// Returns whether a given std::string `s` begins with `x`.
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inline bool StartsWith(absl::string_view s, absl::string_view x) {
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return x.empty() ||
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(s.size() >= x.size() && memcmp(s.data(), x.data(), x.size()) == 0);
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}
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// EndsWith()
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//
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// Returns whether a given std::string `s` ends `x`.
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inline bool EndsWith(absl::string_view s, absl::string_view x) {
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return x.empty() ||
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(s.size() >= x.size() &&
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memcmp(s.data() + (s.size() - x.size()), x.data(), x.size()) == 0);
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}
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// StartsWithIgnoreCase()
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//
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// Returns whether a given std::string `text` starts with `starts_with`, ignoring
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// case in the comparison.
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bool StartsWithIgnoreCase(absl::string_view text,
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absl::string_view starts_with);
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// EndsWithIgnoreCase()
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//
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// Returns whether a given std::string `text` ends with `ends_with`, ignoring case
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// in the comparison.
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bool EndsWithIgnoreCase(absl::string_view text, absl::string_view ends_with);
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} // namespace absl
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#endif // ABSL_STRINGS_MATCH_H_
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