111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
/*
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* Copyright 2010-2018 Max Kellermann <max.kellermann@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef STRING_BUFFER_HXX
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#define STRING_BUFFER_HXX
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#include <array>
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/**
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* A statically allocated string buffer.
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*/
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template<typename T, std::size_t CAPACITY>
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class BasicStringBuffer {
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public:
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typedef T value_type;
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using reference = T &;
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using pointer = T *;
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using const_pointer = const T *;
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using size_type = std::size_t;
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static constexpr value_type SENTINEL = '\0';
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protected:
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using Array = std::array<value_type, CAPACITY>;
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Array the_data;
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public:
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using const_iterator = typename Array::const_iterator;
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constexpr size_type capacity() const noexcept {
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return CAPACITY;
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}
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constexpr bool empty() const noexcept {
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return front() == SENTINEL;
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}
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void clear() noexcept {
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the_data[0] = SENTINEL;
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}
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constexpr const_pointer c_str() const noexcept {
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return &the_data.front();
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}
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pointer data() noexcept {
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return &the_data.front();
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}
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constexpr value_type front() const noexcept {
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return the_data.front();
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}
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/**
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* Returns one character. No bounds checking.
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*/
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value_type operator[](size_type i) const noexcept {
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return the_data[i];
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}
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/**
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* Returns one writable character. No bounds checking.
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*/
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reference operator[](size_type i) noexcept {
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return the_data[i];
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}
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constexpr const_iterator begin() const noexcept {
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return the_data.begin();
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}
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constexpr const_iterator end() const noexcept {
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return the_data.end();
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}
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constexpr operator const_pointer() const noexcept {
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return c_str();
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}
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};
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template<std::size_t CAPACITY>
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class StringBuffer : public BasicStringBuffer<char, CAPACITY> {};
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#endif
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