mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
265 lines
9.3 KiB
C++
265 lines
9.3 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 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_STRING_CHAR_TRAITS_HPP
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#define SPROUT_STRING_CHAR_TRAITS_HPP
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#include <cstddef>
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#include <cstdio>
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#include <string>
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#include <sprout/config.hpp>
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#include <sprout/functional/bind2nd.hpp>
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#include <sprout/iterator/ptr_index_iterator.hpp>
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#include <sprout/algorithm/find_if.hpp>
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#include <sprout/algorithm/tristate_lexicographical_compare.hpp>
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#include <sprout/algorithm/cxx14/copy.hpp>
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#include <sprout/algorithm/cxx14/copy_backward.hpp>
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#include <sprout/algorithm/cxx14/fill.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/cstring/strlen.hpp>
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namespace sprout {
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namespace detail {
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template<typename Traits>
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class char_traits_eq {
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public:
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typedef Traits traits_type;
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typedef typename traits_type::char_type char_type;
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typedef bool result_type;
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typedef char_type first_argument_type;
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typedef char_type second_argument_type;
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public:
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SPROUT_CONSTEXPR bool operator()(char_type c1, char_type c2) const SPROUT_NOEXCEPT {
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return traits_type::eq(c1, c2);
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}
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};
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template<typename Traits>
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class char_traits_lt {
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public:
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typedef Traits traits_type;
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typedef typename traits_type::char_type char_type;
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typedef bool result_type;
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typedef char_type first_argument_type;
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typedef char_type second_argument_type;
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public:
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SPROUT_CONSTEXPR bool operator()(char_type c1, char_type c2) const SPROUT_NOEXCEPT {
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return traits_type::lt(c1, c2);
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}
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};
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} // namespace detail
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//
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// char_traits
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//
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template<typename Char>
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class char_traits {
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private:
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typedef std::char_traits<Char> impl_type;
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public:
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typedef typename impl_type::char_type char_type;
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typedef typename impl_type::int_type int_type;
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typedef typename impl_type::off_type off_type;
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typedef typename impl_type::pos_type pos_type;
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typedef typename impl_type::state_type state_type;
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private:
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static SPROUT_CONSTEXPR char_type const* find_impl(char_type const* found, char_type 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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public:
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static SPROUT_CXX14_CONSTEXPR void assign(char_type& c1, char_type const& c2) SPROUT_NOEXCEPT {
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c1 = c2;
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}
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#ifdef SPROUT_NO_CXX11_CHAR_TRAITS
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static SPROUT_CONSTEXPR bool eq(char_type c1, char_type c2) SPROUT_NOEXCEPT {
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return c1 == c2;
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}
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static SPROUT_CONSTEXPR bool lt(char_type c1, char_type c2) SPROUT_NOEXCEPT {
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return c1 < c2;
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}
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#else
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static SPROUT_CONSTEXPR bool eq(char_type c1, char_type c2) SPROUT_NOEXCEPT {
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return impl_type::eq(c1, c2);
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}
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static SPROUT_CONSTEXPR bool lt(char_type c1, char_type c2) SPROUT_NOEXCEPT {
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return impl_type::lt(c1, c2);
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}
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#endif
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static SPROUT_CONSTEXPR int compare(char_type const* s1, char_type const* s2, std::size_t n) {
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return sprout::tristate_lexicographical_compare(
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sprout::ptr_index(s1), sprout::ptr_index(s1, n), char_type(),
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sprout::ptr_index(s2), sprout::ptr_index(s2, n), char_type(),
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sprout::detail::char_traits_lt<char_traits>()
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);
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}
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static SPROUT_CONSTEXPR std::size_t length(char_type const* s) {
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return sprout::strlen(s);
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}
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static SPROUT_CONSTEXPR char_type const* find(char_type const* s, std::size_t n, char_type const& a) {
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return find_impl(
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sprout::ptr_unindex(
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sprout::find_if(
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sprout::ptr_index(s), sprout::ptr_index(s, n),
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sprout::bind2nd(sprout::detail::char_traits_eq<char_traits>(), a)
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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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static SPROUT_CXX14_CONSTEXPR char_type* move(char_type* s1, char_type const* s2, std::size_t n) {
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sprout::copy_backward(s2, s2 + n, s1);
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return s1;
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}
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static SPROUT_CXX14_CONSTEXPR char_type* copy(char_type* s1, char_type const* s2, std::size_t n) {
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sprout::copy(s2, s2 + n, s1);
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return s1;
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}
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static SPROUT_CXX14_CONSTEXPR char_type* assign(char_type* s, std::size_t n, char_type a) {
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sprout::fill(s, s + n, a);
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return s;
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}
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#ifdef SPROUT_NO_CXX11_CHAR_TRAITS
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static SPROUT_CONSTEXPR int_type not_eof(int_type c) SPROUT_NOEXCEPT {
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return eq_int_type(c, eof()) ? int_type()
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: c
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;
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}
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static SPROUT_CONSTEXPR char_type to_char_type(int_type c) SPROUT_NOEXCEPT {
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return static_cast<char_type>(c);
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}
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static SPROUT_CONSTEXPR int_type to_int_type(char_type c) SPROUT_NOEXCEPT {
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return static_cast<int_type>(c);
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}
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static SPROUT_CONSTEXPR bool eq_int_type(int_type c1, int_type c2) SPROUT_NOEXCEPT {
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return c1 == c2;
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}
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static SPROUT_CONSTEXPR int_type eof() SPROUT_NOEXCEPT {
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return static_cast<int_type>(EOF);
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}
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#else
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static SPROUT_CONSTEXPR int_type not_eof(int_type c) SPROUT_NOEXCEPT {
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return impl_type::not_eof(c);
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}
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static SPROUT_CONSTEXPR char_type to_char_type(int_type c) SPROUT_NOEXCEPT {
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return impl_type::to_char_type(c);
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}
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static SPROUT_CONSTEXPR int_type to_int_type(char_type c) SPROUT_NOEXCEPT {
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return impl_type::to_int_type(c);
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}
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static SPROUT_CONSTEXPR bool eq_int_type(int_type c1, int_type c2) SPROUT_NOEXCEPT {
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return impl_type::eq_int_type(c1, c2);
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}
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static SPROUT_CONSTEXPR int_type eof() SPROUT_NOEXCEPT {
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return impl_type::eof();
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}
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#endif
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#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR int compare(char_type const* s1, ConstInputIterator s2, std::size_t n) {
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return sprout::tristate_lexicographical_compare(
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sprout::ptr_index(s1), sprout::ptr_index(s1, n), char_type(),
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s2, s2 + n, char_type(),
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sprout::detail::char_traits_lt<char_traits>()
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);
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}
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR int compare(ConstInputIterator s1, char_type const* s2, std::size_t n) {
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return sprout::tristate_lexicographical_compare(
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s1, s1 + n, char_type(),
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sprout::ptr_index(s2), sprout::ptr_index(s2, n), char_type(),
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sprout::detail::char_traits_lt<char_traits>()
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);
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}
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template<typename ConstInputIterator1, typename ConstInputIterator2>
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static SPROUT_CONSTEXPR int compare(ConstInputIterator1 s1, ConstInputIterator2 s2, std::size_t n) {
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return sprout::tristate_lexicographical_compare(
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s1, s1 + n, char_type(),
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s2, s2 + n, char_type(),
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sprout::detail::char_traits_lt<char_traits>()
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);
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}
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR std::size_t length(ConstInputIterator s) {
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return sprout::detail::strlen(s);
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}
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR ConstInputIterator find(ConstInputIterator s, std::size_t n, char_type const& a) {
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return sprout::ptr_unindex(
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sprout::find_if(
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s, s + n,
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sprout::bind2nd(sprout::detail::char_traits_eq<char_traits>(), a)
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)
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);
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}
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template<typename OutputIterator, typename ConstInputIterator>
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static SPROUT_CXX14_CONSTEXPR OutputIterator move(OutputIterator s1, ConstInputIterator s2, std::size_t n) {
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sprout::copy_backward(s2, s2 + n, s1);
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return s1;
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}
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template<typename OutputIterator, typename ConstInputIterator>
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static SPROUT_CXX14_CONSTEXPR OutputIterator copy(OutputIterator s1, ConstInputIterator s2, std::size_t n) {
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sprout::copy(s2, s2 + n, s1);
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return s1;
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}
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template<typename OutputIterator>
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static SPROUT_CXX14_CONSTEXPR OutputIterator assign(OutputIterator s, std::size_t n, char_type a) {
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sprout::fill(s, s + n, a);
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return s;
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}
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#endif
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};
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//
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// char_traits_helper
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//
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template<typename Traits>
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class char_traits_helper {
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public:
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typedef Traits traits_type;
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typedef typename traits_type::char_type char_type;
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typedef typename traits_type::int_type int_type;
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typedef typename traits_type::off_type off_type;
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typedef typename traits_type::pos_type pos_type;
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typedef typename traits_type::state_type state_type;
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public:
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static SPROUT_CONSTEXPR std::size_t length(char_type const* s, std::size_t n) {
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return sprout::strlen(s, n);
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}
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static SPROUT_CONSTEXPR char_type const* find(char_type const* s, std::size_t n, char_type const& a) {
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return sprout::ptr_unindex(
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sprout::find_if(
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sprout::ptr_index(s), sprout::ptr_index(s, n),
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sprout::bind2nd(sprout::detail::char_traits_eq<traits_type>(), a)
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)
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);
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}
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static SPROUT_CONSTEXPR bool is_found(char_type const* found, char_type const* last) {
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return found != last;
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}
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#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR std::size_t length(ConstInputIterator s, std::size_t n) {
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return sprout::detail::strlen(s, n);
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}
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR ConstInputIterator find(ConstInputIterator s, std::size_t n, char_type const& a) {
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return sprout::find_if(
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s, s + n,
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sprout::bind2nd(sprout::detail::char_traits_eq<traits_type>(), a)
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);
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}
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template<typename ConstInputIterator>
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static SPROUT_CONSTEXPR bool is_found(ConstInputIterator found, ConstInputIterator last) {
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return found != last;
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}
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#endif
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};
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} // namespace sprout
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#endif // #ifndef SPROUT_STRING_CHAR_TRAITS_HPP
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