73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* Copyright (C) 2015 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_POINTER_HXX
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#define STRING_POINTER_HXX
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/**
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* Simple OO wrapper for a const string pointer.
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*/
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template<typename T=char>
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class StringPointer {
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public:
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typedef T value_type;
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typedef T &reference_type;
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typedef const T &const_reference_type;
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typedef T *pointer_type;
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typedef const T *const_pointer_type;
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static constexpr value_type SENTINEL = '\0';
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private:
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const_pointer_type value;
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public:
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StringPointer() = default;
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constexpr StringPointer(const_pointer_type _value)
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:value(_value) {}
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/**
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* Check if this is a "nulled" instance. A "nulled" instance
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* must not be used.
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*/
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constexpr bool IsNull() const {
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return value == nullptr;
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}
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constexpr const_pointer_type c_str() const {
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return value;
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}
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bool empty() const {
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return *value == SENTINEL;
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}
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};
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#endif
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