mirror of
https://github.com/matrix-construct/construct
synced 2024-12-11 08:02:59 +01:00
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_STRN_H
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// Vintage
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namespace ircd
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{
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struct strncpy;
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}
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/// This is a function. It works the same as the standard strncpy() but it has
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/// some useful modernizations and may be informally referred to as strncpy++.
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/// See ircd::strlcpy() documentation for reasoning details.
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///
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struct ircd::strncpy
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{
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mutable_buffer ret;
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public:
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operator string_view() const
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{
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return ret;
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}
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operator size_t() const
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{
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return size(ret);
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}
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strncpy(char *const &dst, const string_view &src, const size_t &max)
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:ret{[&]() -> mutable_buffer
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{
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const auto len(std::min(src.size(), max));
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buffer::copy(mutable_buffer(dst, len), src);
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return { dst, len };
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}()}
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{}
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#ifndef HAVE_STRNCPY
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strncpy(char *const &dst, const char *const &src, const size_t &max)
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:strncpy{dst, string_view{src, strnlen(src, max)}, max}
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{}
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#endif
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strncpy(const mutable_buffer &dst, const string_view &src)
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:strncpy{data(dst), src, size(dst)}
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{}
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};
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