| /* |
| * |
| * Copyright 2015-2016, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #ifndef GRPCXX_IMPL_CODEGEN_STRING_REF_H |
| #define GRPCXX_IMPL_CODEGEN_STRING_REF_H |
| |
| #include <iterator> |
| #include <iosfwd> |
| |
| #include <grpc++/impl/codegen/config.h> |
| |
| namespace grpc { |
| |
| /// This class is a non owning reference to a string. |
| /// |
| /// It should be a strict subset of the upcoming std::string_ref. |
| /// |
| /// \see http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3442.html |
| /// |
| /// The constexpr is dropped or replaced with const for legacy compiler |
| /// compatibility. |
| class string_ref { |
| public: |
| // types |
| typedef const char* const_iterator; |
| typedef std::reverse_iterator<const_iterator> const_reverse_iterator; |
| |
| // constants |
| const static size_t npos; |
| |
| // construct/copy. |
| string_ref() : data_(nullptr), length_(0) {} |
| string_ref(const string_ref& other) |
| : data_(other.data_), length_(other.length_) {} |
| string_ref& operator=(const string_ref& rhs); |
| string_ref(const char* s); |
| string_ref(const char* s, size_t l) : data_(s), length_(l) {} |
| string_ref(const grpc::string& s) : data_(s.data()), length_(s.length()) {} |
| |
| // iterators |
| const_iterator begin() const { return data_; } |
| const_iterator end() const { return data_ + length_; } |
| const_iterator cbegin() const { return data_; } |
| const_iterator cend() const { return data_ + length_; } |
| const_reverse_iterator rbegin() const { |
| return const_reverse_iterator(end()); |
| } |
| const_reverse_iterator rend() const { |
| return const_reverse_iterator(begin()); |
| } |
| const_reverse_iterator crbegin() const { |
| return const_reverse_iterator(end()); |
| } |
| const_reverse_iterator crend() const { |
| return const_reverse_iterator(begin()); |
| } |
| |
| // capacity |
| size_t size() const { return length_; } |
| size_t length() const { return length_; } |
| size_t max_size() const { return length_; } |
| bool empty() const { return length_ == 0; } |
| |
| // element access |
| const char* data() const { return data_; } |
| |
| // string operations |
| int compare(string_ref x) const; |
| bool starts_with(string_ref x) const; |
| bool ends_with(string_ref x) const; |
| size_t find(string_ref s) const; |
| size_t find(char c) const; |
| |
| string_ref substr(size_t pos, size_t n = npos) const; |
| |
| private: |
| const char* data_; |
| size_t length_; |
| }; |
| |
| // Comparison operators |
| bool operator==(string_ref x, string_ref y); |
| bool operator!=(string_ref x, string_ref y); |
| bool operator<(string_ref x, string_ref y); |
| bool operator>(string_ref x, string_ref y); |
| bool operator<=(string_ref x, string_ref y); |
| bool operator>=(string_ref x, string_ref y); |
| |
| std::ostream& operator<<(std::ostream& stream, const string_ref& string); |
| |
| } // namespace grpc |
| |
| #endif // GRPCXX_IMPL_CODEGEN_STRING_REF_H |