libs/url/src/pct_string_view.cpp
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libs/url/src/pct_string_view.cpp
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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2022 Vinnie Falco (vinnie.falco@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/error.hpp> | ||
| 13 | #include <boost/url/pct_string_view.hpp> | ||
| 14 | #include <boost/url/detail/decode.hpp> | ||
| 15 | #include <boost/url/grammar/hexdig_chars.hpp> | ||
| 16 | #include <boost/url/detail/except.hpp> | ||
| 17 | |||
| 18 | namespace boost { | ||
| 19 | namespace urls { | ||
| 20 | |||
| 21 | void | ||
| 22 | 3561 | pct_string_view:: | |
| 23 | decode_impl( | ||
| 24 | string_token::arg& dest, | ||
| 25 | encoding_opts opt) const | ||
| 26 | { | ||
| 27 | 3561 | auto p = dest.prepare(dn_); | |
| 28 |
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3561 | if(dn_ > 0) |
| 29 | 2727 | detail::decode_unsafe( | |
| 30 | 2727 | p, p + dn_, s_, opt); | |
| 31 | 3561 | } | |
| 32 | |||
| 33 | //------------------------------------------------ | ||
| 34 | |||
| 35 | 6004 | pct_string_view:: | |
| 36 | pct_string_view( | ||
| 37 | 6004 | core::string_view s) | |
| 38 | : pct_string_view( | ||
| 39 | 6004 | make_pct_string_view(s | |
| 40 |
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6004 | ).value(BOOST_URL_POS)) |
| 41 | { | ||
| 42 | 5926 | } | |
| 43 | |||
| 44 | //------------------------------------------------ | ||
| 45 | |||
| 46 | system::result<pct_string_view> | ||
| 47 | 6048 | make_pct_string_view( | |
| 48 | core::string_view s) noexcept | ||
| 49 | { | ||
| 50 | 6048 | auto p = s.begin(); | |
| 51 | 6048 | auto const end = s.end(); | |
| 52 | 6048 | std::size_t dn = 0; | |
| 53 |
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6048 | if(s.size() >= 3) |
| 54 | { | ||
| 55 | 3173 | auto const safe_end = end - 2; | |
| 56 |
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25237 | while(p < safe_end) |
| 57 | { | ||
| 58 |
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22080 | if(*p != '%') |
| 59 | { | ||
| 60 | 21204 | ++p; | |
| 61 | } | ||
| 62 | 876 | else if( | |
| 63 |
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1747 | grammar::hexdig_value(p[1]) >= 0 && |
| 64 | 871 | grammar::hexdig_value(p[2]) >= 0) | |
| 65 | { | ||
| 66 | // percent-escape | ||
| 67 | 860 | p += 3; | |
| 68 | } | ||
| 69 | else | ||
| 70 | { | ||
| 71 | // invalid encoding | ||
| 72 | 16 | BOOST_URL_RETURN_EC( | |
| 73 | error::bad_pct_hexdig); | ||
| 74 | } | ||
| 75 | 22064 | ++dn; | |
| 76 | } | ||
| 77 | } | ||
| 78 | 6032 | auto const n = end - p; | |
| 79 |
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6032 | if( (n >= 1 && p[0] == '%') || |
| 80 |
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3522 | (n >= 2 && p[1] == '%')) |
| 81 | { | ||
| 82 | // invalid encoding | ||
| 83 | 65 | BOOST_URL_RETURN_EC( | |
| 84 | error::incomplete_encoding); | ||
| 85 | } | ||
| 86 | 5967 | dn += n; | |
| 87 | 11934 | return make_pct_string_view_unsafe( | |
| 88 | 5967 | s.data(), s.size(), dn); | |
| 89 | } | ||
| 90 | |||
| 91 | } // urls | ||
| 92 | } // boost | ||
| 93 | |||
| 94 |