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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 | #include <boost/url/detail/config.hpp> | ||
| 11 | #include "h16_rule.hpp" | ||
| 12 | #include <boost/url/grammar/charset.hpp> | ||
| 13 | #include <boost/url/grammar/error.hpp> | ||
| 14 | #include <boost/url/grammar/hexdig_chars.hpp> | ||
| 15 | #include <boost/assert.hpp> | ||
| 16 | |||
| 17 | namespace boost { | ||
| 18 | namespace urls { | ||
| 19 | namespace detail { | ||
| 20 | |||
| 21 | auto | ||
| 22 | 932 | h16_rule_t:: | |
| 23 | parse( | ||
| 24 | char const*& it, | ||
| 25 | char const* end | ||
| 26 | ) const noexcept -> | ||
| 27 | system::result<value_type> | ||
| 28 | { | ||
| 29 | // VFALCO it might be impossible for | ||
| 30 | // this condition to be true (coverage) | ||
| 31 |
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932 | if(it == end) |
| 32 | { | ||
| 33 | // end | ||
| 34 | ✗ | BOOST_URL_RETURN_EC( | |
| 35 | grammar::error::invalid); | ||
| 36 | } | ||
| 37 | |||
| 38 | std::uint16_t v; | ||
| 39 | for(;;) | ||
| 40 | { | ||
| 41 | 932 | auto d = grammar::hexdig_value(*it); | |
| 42 |
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932 | if(d < 0) |
| 43 | { | ||
| 44 | // expected HEXDIG | ||
| 45 | 25 | BOOST_URL_RETURN_EC( | |
| 46 | grammar::error::invalid); | ||
| 47 | } | ||
| 48 | 907 | v = d; | |
| 49 | 907 | ++it; | |
| 50 |
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907 | if(it == end) |
| 51 | 75 | break; | |
| 52 | 832 | d = grammar::hexdig_value(*it); | |
| 53 |
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832 | if(d < 0) |
| 54 | 556 | break; | |
| 55 | 276 | v = (16 * v) + d; | |
| 56 | 276 | ++it; | |
| 57 |
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276 | if(it == end) |
| 58 | 4 | break; | |
| 59 | 272 | d = grammar::hexdig_value(*it); | |
| 60 |
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272 | if(d < 0) |
| 61 | 4 | break; | |
| 62 | 268 | v = (16 * v) + d; | |
| 63 | 268 | ++it; | |
| 64 |
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268 | if(it == end) |
| 65 | 4 | break; | |
| 66 | 264 | d = grammar::hexdig_value(*it); | |
| 67 |
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264 | if(d < 0) |
| 68 | 51 | break; | |
| 69 | 213 | v = (16 * v) + d; | |
| 70 | 213 | ++it; | |
| 71 | 213 | break; | |
| 72 | } | ||
| 73 | 907 | return value_type{ | |
| 74 | static_cast< | ||
| 75 | 907 | unsigned char>(v / 256), | |
| 76 | static_cast< | ||
| 77 | 907 | unsigned char>(v % 256)}; | |
| 78 | } | ||
| 79 | |||
| 80 | } // detail | ||
| 81 | } // urls | ||
| 82 | } // boost | ||
| 83 | |||
| 84 |