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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/boostorg/url | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_URL_GRAMMAR_DETAIL_CHARSET_HPP | ||
| 11 | #define BOOST_URL_GRAMMAR_DETAIL_CHARSET_HPP | ||
| 12 | |||
| 13 | #include <boost/core/bit.hpp> | ||
| 14 | #include <type_traits> | ||
| 15 | |||
| 16 | #ifdef BOOST_URL_USE_SSE2 | ||
| 17 | # include <emmintrin.h> | ||
| 18 | # include <xmmintrin.h> | ||
| 19 | # ifdef _MSC_VER | ||
| 20 | # include <intrin.h> | ||
| 21 | # endif | ||
| 22 | #endif | ||
| 23 | |||
| 24 | #ifdef _MSC_VER | ||
| 25 | #pragma warning(push) | ||
| 26 | #pragma warning(disable: 4127) // conditional expression is constant | ||
| 27 | #endif | ||
| 28 | |||
| 29 | namespace boost { | ||
| 30 | namespace urls { | ||
| 31 | namespace grammar { | ||
| 32 | namespace detail { | ||
| 33 | |||
| 34 | template<class T, class = void> | ||
| 35 | struct has_find_if : std::false_type {}; | ||
| 36 | |||
| 37 | template<class T> | ||
| 38 | struct has_find_if<T, void_t< | ||
| 39 | decltype( | ||
| 40 | std::declval<char const*&>() = | ||
| 41 | std::declval<T const&>().find_if( | ||
| 42 | std::declval<char const*>(), | ||
| 43 | std::declval<char const*>()) | ||
| 44 | )>> : std::true_type | ||
| 45 | { | ||
| 46 | }; | ||
| 47 | |||
| 48 | template<class T, class = void> | ||
| 49 | struct has_find_if_not : std::false_type {}; | ||
| 50 | |||
| 51 | template<class T> | ||
| 52 | struct has_find_if_not<T, void_t< | ||
| 53 | decltype( | ||
| 54 | std::declval<char const*&>() = | ||
| 55 | std::declval<T const&>().find_if_not( | ||
| 56 | std::declval<char const*>(), | ||
| 57 | std::declval<char const*>()) | ||
| 58 | )>> : std::true_type | ||
| 59 | { | ||
| 60 | }; | ||
| 61 | |||
| 62 | template<class Pred> | ||
| 63 | char const* | ||
| 64 | 9 | find_if( | |
| 65 | char const* first, | ||
| 66 | char const* const last, | ||
| 67 | Pred const& pred, | ||
| 68 | std::false_type) noexcept | ||
| 69 | { | ||
| 70 |
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9 | while(first != last) |
| 71 | { | ||
| 72 |
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9 | if(pred(*first)) |
| 73 | 1 | break; | |
| 74 | 8 | ++first; | |
| 75 | } | ||
| 76 | 1 | return first; | |
| 77 | } | ||
| 78 | |||
| 79 | template<class Pred> | ||
| 80 | char const* | ||
| 81 | 2883 | find_if( | |
| 82 | char const* first, | ||
| 83 | char const* const last, | ||
| 84 | Pred const& pred, | ||
| 85 | std::true_type) noexcept | ||
| 86 | { | ||
| 87 | return pred.find_if( | ||
| 88 | 2883 | first, last); | |
| 89 | } | ||
| 90 | |||
| 91 | template<class Pred> | ||
| 92 | char const* | ||
| 93 | 4 | find_if_not( | |
| 94 | char const* first, | ||
| 95 | char const* const last, | ||
| 96 | Pred const& pred, | ||
| 97 | std::false_type) noexcept | ||
| 98 | { | ||
| 99 |
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4 | while(first != last) |
| 100 | { | ||
| 101 |
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4 | if(! pred(*first)) |
| 102 | 1 | break; | |
| 103 | 3 | ++first; | |
| 104 | } | ||
| 105 | 1 | return first; | |
| 106 | } | ||
| 107 | |||
| 108 | template<class Pred> | ||
| 109 | char const* | ||
| 110 | 20257 | find_if_not( | |
| 111 | char const* first, | ||
| 112 | char const* const last, | ||
| 113 | Pred const& pred, | ||
| 114 | std::true_type) noexcept | ||
| 115 | { | ||
| 116 | return pred.find_if_not( | ||
| 117 | 20257 | first, last); | |
| 118 | } | ||
| 119 | |||
| 120 | #ifdef BOOST_URL_USE_SSE2 | ||
| 121 | |||
| 122 | // by Peter Dimov | ||
| 123 | template<class Pred> | ||
| 124 | char const* | ||
| 125 | 2936 | find_if_pred( | |
| 126 | Pred const& pred, | ||
| 127 | char const* first, | ||
| 128 | char const* last ) noexcept | ||
| 129 | { | ||
| 130 |
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2936 | while( last - first >= 16 ) |
| 131 | { | ||
| 132 | 642 | unsigned char r[ 16 ] = {}; | |
| 133 |
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10914 | for( int i = 0; i < 16; ++i ) |
| 134 |
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10272 | r[ i ] = pred( first[ i ] )? 0xFF: 0x00; |
| 135 | 642 | __m128i r2 = _mm_loadu_si128( (__m128i const*)r ); | |
| 136 | 642 | unsigned r3 = _mm_movemask_epi8( r2 ); | |
| 137 |
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642 | if( r3 ) |
| 138 | 333 | return first + boost::core::countr_zero( r3 ); | |
| 139 | 309 | first += 16; | |
| 140 | } | ||
| 141 | 2835 | while( | |
| 142 |
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8452 | first != last && |
| 143 |
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3323 | ! pred(*first)) |
| 144 | { | ||
| 145 | 2835 | ++first; | |
| 146 | } | ||
| 147 | 2294 | return first; | |
| 148 | } | ||
| 149 | |||
| 150 | // by Peter Dimov | ||
| 151 | template<class Pred> | ||
| 152 | char const* | ||
| 153 | 15384 | find_if_not_pred( | |
| 154 | Pred const& pred, | ||
| 155 | char const* first, | ||
| 156 | char const* last ) noexcept | ||
| 157 | { | ||
| 158 |
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15384 | while( last - first >= 16 ) |
| 159 | { | ||
| 160 | 3693 | unsigned char r[ 16 ] = {}; | |
| 161 |
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62781 | for( int i = 0; i < 16; ++i ) |
| 162 |
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59088 | r[ i ] = pred( first[ i ] )? 0x00: 0xFF; |
| 163 | 3693 | __m128i r2 = _mm_loadu_si128( (__m128i const*)r ); | |
| 164 | 3693 | unsigned r3 = _mm_movemask_epi8( r2 ); | |
| 165 |
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3693 | if( r3 ) |
| 166 | 3304 | return first + boost::core::countr_zero( r3 ); | |
| 167 | 389 | first += 16; | |
| 168 | } | ||
| 169 | 28943 | while( | |
| 170 |
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77908 | first != last && |
| 171 | 37274 | pred(*first)) | |
| 172 | { | ||
| 173 | 28943 | ++first; | |
| 174 | } | ||
| 175 | 11691 | return first; | |
| 176 | } | ||
| 177 | |||
| 178 | #endif | ||
| 179 | |||
| 180 | } // detail | ||
| 181 | } // grammar | ||
| 182 | } // urls | ||
| 183 | } // boost | ||
| 184 | |||
| 185 | #ifdef _MSC_VER | ||
| 186 | #pragma warning(pop) | ||
| 187 | #endif | ||
| 188 | |||
| 189 | #endif | ||
| 190 |