67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
/*
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* Copyright (C) 2014-2017 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 CONCAT_STRING_HXX
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#define CONCAT_STRING_HXX
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#include <algorithm>
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#include <string.h>
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template<typename... Args>
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size_t
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FillLengths(size_t *lengths, const char *a, Args&&... args)
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{
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return FillLengths(lengths, a) + FillLengths(lengths + 1, args...);
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}
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template<>
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size_t
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FillLengths(size_t *lengths, const char *a)
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{
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return *lengths = strlen(a);
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}
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template<typename... Args>
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char *
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StringCat(char *p, const size_t *lengths, const char *a, Args&&... args)
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{
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return StringCat(StringCat(p, lengths, a),
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lengths + 1, args...);
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}
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template<>
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char *
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StringCat(char *p, const size_t *lengths, const char *a)
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{
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return std::copy_n(a, *lengths, p);
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}
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#endif
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