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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.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 | |||
| 11 | #include <boost/url/detail/config.hpp> | ||
| 12 | #include "boost/url/detail/replacement_field_rule.hpp" | ||
| 13 | #include <boost/url/grammar/alnum_chars.hpp> | ||
| 14 | #include <boost/url/grammar/alpha_chars.hpp> | ||
| 15 | #include <boost/url/grammar/delim_rule.hpp> | ||
| 16 | #include <boost/url/grammar/lut_chars.hpp> | ||
| 17 | #include <boost/url/grammar/optional_rule.hpp> | ||
| 18 | #include <boost/url/grammar/parse.hpp> | ||
| 19 | #include <boost/url/grammar/token_rule.hpp> | ||
| 20 | #include <boost/url/grammar/tuple_rule.hpp> | ||
| 21 | #include <boost/url/grammar/vchars.hpp> | ||
| 22 | |||
| 23 | namespace boost { | ||
| 24 | namespace urls { | ||
| 25 | namespace detail { | ||
| 26 | |||
| 27 | auto | ||
| 28 | 673 | replacement_field_rule_t:: | |
| 29 | parse( | ||
| 30 | char const*& it, | ||
| 31 | char const* const end) const noexcept -> | ||
| 32 | system::result<value_type> | ||
| 33 | { | ||
| 34 | static constexpr auto replacement_field_rules = | ||
| 35 | grammar::tuple_rule( | ||
| 36 | // open | ||
| 37 | grammar::squelch( | ||
| 38 | grammar::delim_rule('{')), | ||
| 39 | // id | ||
| 40 | grammar::optional_rule(arg_id_rule), | ||
| 41 | // format options | ||
| 42 | grammar::optional_rule( | ||
| 43 | grammar::tuple_rule( | ||
| 44 | grammar::squelch( | ||
| 45 | grammar::delim_rule(':')), | ||
| 46 | format_spec_rule)), | ||
| 47 | // close | ||
| 48 | grammar::squelch( | ||
| 49 | grammar::delim_rule('}'))); | ||
| 50 | 673 | auto it0 = it; | |
| 51 | 1346 | auto rv = grammar::parse(it, end, replacement_field_rules); | |
| 52 |
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673 | if (!rv) |
| 53 | { | ||
| 54 | 328 | BOOST_URL_RETURN_EC( | |
| 55 | grammar::error::mismatch); | ||
| 56 | } | ||
| 57 | 345 | return core::string_view(it0, it); | |
| 58 | } | ||
| 59 | |||
| 60 | auto | ||
| 61 | 720 | identifier_rule_t:: | |
| 62 | parse( | ||
| 63 | char const*& it, | ||
| 64 | char const* const end) const noexcept | ||
| 65 | -> system::result<value_type> | ||
| 66 | { | ||
| 67 | static constexpr auto identifier_rules = | ||
| 68 | grammar::tuple_rule( | ||
| 69 | grammar::delim_rule( | ||
| 70 | grammar::alpha_chars + | ||
| 71 | grammar::lut_chars('_')), | ||
| 72 | grammar::optional_rule( | ||
| 73 | grammar::token_rule( | ||
| 74 | grammar::alnum_chars + | ||
| 75 | grammar::lut_chars('_')))); | ||
| 76 | 720 | char const* it0 = it; | |
| 77 | 1440 | auto rv = grammar::parse(it, end, identifier_rules); | |
| 78 |
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720 | if (!rv) |
| 79 | { | ||
| 80 | 349 | BOOST_URL_RETURN_EC( | |
| 81 | grammar::error::mismatch); | ||
| 82 | } | ||
| 83 | 371 | return core::string_view(it0, it); | |
| 84 | } | ||
| 85 | |||
| 86 | auto | ||
| 87 | 86 | format_spec_rule_t:: | |
| 88 | parse( | ||
| 89 | char const*& it, | ||
| 90 | char const* const end) const noexcept | ||
| 91 | -> system::result<value_type> | ||
| 92 | { | ||
| 93 |
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86 | if (it == end) |
| 94 | 2 | return {}; | |
| 95 | |||
| 96 | // any tokens allowed in fmt specs | ||
| 97 | static constexpr auto fmt_specs_token_rule = | ||
| 98 | grammar::optional_rule( | ||
| 99 | grammar::token_rule( | ||
| 100 | grammar::vchars + | ||
| 101 | grammar::lut_chars(' ') | ||
| 102 | - "{}")); | ||
| 103 | |||
| 104 | // internal ids in the fmt specs | ||
| 105 | // "{" [arg_id] "}" | ||
| 106 | static constexpr auto internal_id_rule = | ||
| 107 | grammar::tuple_rule( | ||
| 108 | grammar::squelch( | ||
| 109 | grammar::delim_rule('{')), | ||
| 110 | grammar::optional_rule( | ||
| 111 | arg_id_rule), | ||
| 112 | grammar::squelch( | ||
| 113 | grammar::delim_rule('}'))); | ||
| 114 | |||
| 115 | 84 | auto start = it; | |
| 116 | // consume fmt_spec chars | ||
| 117 |
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112 | while (grammar::parse(it, end, fmt_specs_token_rule)) |
| 118 | { | ||
| 119 | 112 | auto it0 = it; | |
| 120 | // consume internal id | ||
| 121 |
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112 | if (!grammar::parse(it, end, internal_id_rule)) |
| 122 | { | ||
| 123 | // rewind | ||
| 124 | 84 | it = it0; | |
| 125 | 84 | break; | |
| 126 | } | ||
| 127 | } | ||
| 128 | |||
| 129 | 84 | return core::string_view(start, it); | |
| 130 | } | ||
| 131 | |||
| 132 | } // detail | ||
| 133 | } // urls | ||
| 134 | } // boost | ||
| 135 | |||
| 136 |