mirror of
https://github.com/bolero-MURAKAMI/Sprout
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34 lines
946 B
C++
34 lines
946 B
C++
#ifndef SPROUT_CSTRING_MEMCHR_HPP
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#define SPROUT_CSTRING_MEMCHR_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 void const*
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memchr_impl(unsigned char const* s, unsigned char c, std::size_t n) {
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return !n ? 0
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: *s == c ? s
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: sprout::detail::memchr_impl(s + 1, c, n - 1)
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;
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}
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} // namespace detail
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// 7.21.5.1 memchr ŠÖ<C5A0>”
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inline SPROUT_CONSTEXPR void const*
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memchr(void const* s, int c, size_t n) {
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return sprout::detail::memchr_impl(static_cast<unsigned char const*>(s), static_cast<unsigned char>(c), n);
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}
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inline SPROUT_CONSTEXPR void*
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memchr(void* s, int c, size_t n) {
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return const_cast<void*>(
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sprout::detail::memchr_impl(static_cast<unsigned char*>(s), static_cast<unsigned char>(c), n)
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);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_CSTRING_MEMCHR_HPP
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