1   
//
1   
//
2   
// Copyright (c) 2021 Vinnie Falco (vinnie dot falco at gmail dot com)
2   
// Copyright (c) 2021 Vinnie Falco (vinnie dot falco at gmail dot com)
3   
//
3   
//
4   
// Distributed under the Boost Software License, Version 1.0. (See accompanying
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)
5   
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6   
//
6   
//
7   
// Official repository: https://github.com/boostorg/url
7   
// Official repository: https://github.com/boostorg/url
8   
//
8   
//
9  
9  
10   
#ifndef BOOST_URL_GRAMMAR_ALNUM_CHARS_HPP
10   
#ifndef BOOST_URL_GRAMMAR_ALNUM_CHARS_HPP
11   
#define BOOST_URL_GRAMMAR_ALNUM_CHARS_HPP
11   
#define BOOST_URL_GRAMMAR_ALNUM_CHARS_HPP
12  
12  
13   
#include <boost/url/detail/config.hpp>
13   
#include <boost/url/detail/config.hpp>
14   
#include <boost/url/grammar/detail/charset.hpp>
14   
#include <boost/url/grammar/detail/charset.hpp>
15  
15  
16   
namespace boost {
16   
namespace boost {
17   
namespace urls {
17   
namespace urls {
18   
namespace grammar {
18   
namespace grammar {
19   
namespace implementation_defined {
19   
namespace implementation_defined {
20   
struct alnum_chars_t
20   
struct alnum_chars_t
21   
{
21   
{
22   
    constexpr
22   
    constexpr
23   
    bool
23   
    bool
24   
    operator()(char c) const noexcept
24   
    operator()(char c) const noexcept
25   
    {
25   
    {
26   
        return
26   
        return
27   
            (c >= '0' && c <= '9') ||
27   
            (c >= '0' && c <= '9') ||
28   
            (c >= 'A' && c <= 'Z') ||
28   
            (c >= 'A' && c <= 'Z') ||
29   
            (c >= 'a' && c <= 'z');
29   
            (c >= 'a' && c <= 'z');
30   
    }
30   
    }
31  
31  
32   
#ifdef BOOST_URL_USE_SSE2
32   
#ifdef BOOST_URL_USE_SSE2
33   
    char const*
33   
    char const*
34   
    find_if(
34   
    find_if(
35   
        char const* first,
35   
        char const* first,
36   
        char const* last) const noexcept
36   
        char const* last) const noexcept
37   
    {
37   
    {
38   
        return detail::find_if_pred(
38   
        return detail::find_if_pred(
39   
            *this, first, last);
39   
            *this, first, last);
40   
    }
40   
    }
41  
41  
42   
    char const*
42   
    char const*
43   
    find_if_not(
43   
    find_if_not(
44   
        char const* first,
44   
        char const* first,
45   
        char const* last) const noexcept
45   
        char const* last) const noexcept
46   
    {
46   
    {
47   
        return detail::find_if_not_pred(
47   
        return detail::find_if_not_pred(
48   
            *this, first, last);
48   
            *this, first, last);
49   
    }
49   
    }
50   
#endif
50   
#endif
51   
};
51   
};
52   
} // implementation_defined
52   
} // implementation_defined
53  
53  
54   
/** The set of letters and digits
54   
/** The set of letters and digits
55  
55  
56   
    @par Example
56   
    @par Example
57   
    Character sets are used with rules and the
57   
    Character sets are used with rules and the
58   
    functions @ref find_if and @ref find_if_not.
58   
    functions @ref find_if and @ref find_if_not.
59   
    @code
59   
    @code
60   
    system::result< core::string_view > = parse( "Johnny42", token_rule( alnumchars ) );
60   
    system::result< core::string_view > = parse( "Johnny42", token_rule( alnumchars ) );
61   
    @endcode
61   
    @endcode
62  
62  
63   
    @par BNF
63   
    @par BNF
64   
    @code
64   
    @code
65   
    ALNUM       = ALPHA / DIGIT
65   
    ALNUM       = ALPHA / DIGIT
66  
66  
67   
    ALPHA       = %x41-5A / %x61-7A
67   
    ALPHA       = %x41-5A / %x61-7A
68   
                ; A-Z / a-z
68   
                ; A-Z / a-z
69  
69  
70   
    DIGIT       = %x30-39
70   
    DIGIT       = %x30-39
71   
                ; 0-9
71   
                ; 0-9
72   
    @endcode
72   
    @endcode
73  
73  
74   
    @par Specification
74   
    @par Specification
75   
    @li <a href="https://datatracker.ietf.org/doc/html/rfc5234#appendix-B.1"
75   
    @li <a href="https://datatracker.ietf.org/doc/html/rfc5234#appendix-B.1"
76   
        >B.1. Core Rules (rfc5234)</a>
76   
        >B.1. Core Rules (rfc5234)</a>
77  
77  
78   
    @see
78   
    @see
79   
        @ref find_if,
79   
        @ref find_if,
80   
        @ref find_if_not,
80   
        @ref find_if_not,
81   
        @ref parse,
81   
        @ref parse,
82   
        @ref token_rule.
82   
        @ref token_rule.
83   
*/
83   
*/
84   
constexpr implementation_defined::alnum_chars_t alnum_chars{};
84   
constexpr implementation_defined::alnum_chars_t alnum_chars{};
85  
85  
86   
} // grammar
86   
} // grammar
87   
} // urls
87   
} // urls
88   
} // boost
88   
} // boost
89  
89  
90   
#endif
90   
#endif