mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2013 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_CWCHAR_WMEMCHR_HPP
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#define SPROUT_CWCHAR_WMEMCHR_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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#include <sprout/iterator/ptr_index_iterator.hpp>
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#include <sprout/algorithm/find.hpp>
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namespace sprout {
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namespace detail {
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inline SPROUT_CONSTEXPR wchar_t const*
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wmemchr_impl(wchar_t const* found, wchar_t const* last) {
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return found == last ? nullptr
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: found
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;
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}
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inline SPROUT_CONSTEXPR wchar_t*
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wmemchr_impl(wchar_t* found, wchar_t* last) {
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return found == last ? nullptr
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: found
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;
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}
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} // namespace detail
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//
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// wmemchr
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//
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// recursion depth:
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// O(log N)
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//
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inline SPROUT_CONSTEXPR wchar_t const*
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wmemchr(wchar_t const* s, wchar_t c, size_t n) {
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return sprout::detail::wmemchr_impl(
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sprout::ptr_unindex(
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sprout::find(
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sprout::ptr_index(s), sprout::ptr_index(s, n),
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c
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)
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),
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s + n
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);
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}
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inline SPROUT_CONSTEXPR wchar_t*
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wmemchr(wchar_t* s, wchar_t c, size_t n) {
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return sprout::detail::wmemchr_impl(
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sprout::ptr_unindex(
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sprout::find(
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sprout::ptr_index(s), sprout::ptr_index(s, n),
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c
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)
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),
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s + n
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);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_CWCHAR_WMEMCHR_HPP
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