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https://github.com/bolero-MURAKAMI/Sprout.git
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29 lines
785 B
C++
29 lines
785 B
C++
#ifndef SPROUT_CSTRING_MEMCMP_HPP
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#define SPROUT_CSTRING_MEMCMP_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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namespace sprout {
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// Copyright (C) 2011 RiSK (sscrisk)
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namespace detail {
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inline SPROUT_CONSTEXPR int memcmp_impl(unsigned char const* s1, unsigned char const* s2, std::size_t n) {
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return !n ? 0
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: *s1 == *s2 ? sprout::detail::memcmp_impl(s1 + 1, s2 + 1, n - 1)
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: *s1 - *s2
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;
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}
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} // namespace detail
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// 7.21.4.1 memcmp ŠÖ<C5A0>”
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inline SPROUT_CONSTEXPR int memcmp(void const* s1, void const* s2, std::size_t n) {
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return sprout::detail::memcmp_impl(
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static_cast<unsigned char const*>(s1),
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static_cast<unsigned char const*>(s2),
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n
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);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_CSTRING_MEMCMP_HPP
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