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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_IMPL_GRAMMAR_DEC_OCTET_RULE_IPP | ||
| 11 | #define BOOST_URL_IMPL_GRAMMAR_DEC_OCTET_RULE_IPP | ||
| 12 | |||
| 13 | #include <boost/url/detail/config.hpp> | ||
| 14 | #include <boost/url/grammar/charset.hpp> | ||
| 15 | #include <boost/url/grammar/dec_octet_rule.hpp> | ||
| 16 | #include <boost/url/grammar/digit_chars.hpp> | ||
| 17 | #include <boost/url/grammar/error.hpp> | ||
| 18 | |||
| 19 | namespace boost { | ||
| 20 | namespace urls { | ||
| 21 | namespace grammar { | ||
| 22 | |||
| 23 | auto | ||
| 24 | 2276 | dec_octet_rule_t:: | |
| 25 | parse( | ||
| 26 | char const*& it, | ||
| 27 | char const* const end | ||
| 28 | ) const noexcept -> | ||
| 29 | system::result<value_type> | ||
| 30 | { | ||
| 31 |
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2276 | if(it == end) |
| 32 | { | ||
| 33 | // end | ||
| 34 | 14 | BOOST_URL_RETURN_EC( | |
| 35 | error::mismatch); | ||
| 36 | } | ||
| 37 |
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2262 | if(! digit_chars(*it)) |
| 38 | { | ||
| 39 | // expected DIGIT | ||
| 40 | 1632 | BOOST_URL_RETURN_EC( | |
| 41 | error::mismatch); | ||
| 42 | } | ||
| 43 | 630 | unsigned v = *it - '0'; | |
| 44 | 630 | ++it; | |
| 45 |
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1194 | if( it == end || |
| 46 |
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564 | ! digit_chars(*it)) |
| 47 | { | ||
| 48 | 424 | return static_cast< | |
| 49 | 424 | value_type>(v); | |
| 50 | } | ||
| 51 |
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206 | if(v == 0) |
| 52 | { | ||
| 53 | // leading '0' | ||
| 54 | 11 | BOOST_URL_RETURN_EC( | |
| 55 | error::invalid); | ||
| 56 | } | ||
| 57 | 195 | v = (10 * v) + *it - '0'; | |
| 58 | 195 | ++it; | |
| 59 |
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386 | if( it == end || |
| 60 |
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191 | ! digit_chars(*it)) |
| 61 | { | ||
| 62 | 23 | return static_cast< | |
| 63 | 23 | value_type>(v); | |
| 64 | } | ||
| 65 |
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172 | if(v > 25) |
| 66 | { | ||
| 67 | // integer overflow | ||
| 68 | 13 | BOOST_URL_RETURN_EC( | |
| 69 | error::invalid); | ||
| 70 | } | ||
| 71 | 159 | v = (10 * v) + *it - '0'; | |
| 72 |
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159 | if(v > 255) |
| 73 | { | ||
| 74 | // integer overflow | ||
| 75 | 17 | BOOST_URL_RETURN_EC( | |
| 76 | error::invalid); | ||
| 77 | } | ||
| 78 | 142 | ++it; | |
| 79 |
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272 | if( it != end && |
| 80 | 130 | digit_chars(*it)) | |
| 81 | { | ||
| 82 | // integer overflow | ||
| 83 | 7 | BOOST_URL_RETURN_EC( | |
| 84 | error::invalid); | ||
| 85 | } | ||
| 86 | 135 | return static_cast< | |
| 87 | 135 | value_type>(v); | |
| 88 | } | ||
| 89 | |||
| 90 | } // grammar | ||
| 91 | } // urls | ||
| 92 | } // boost | ||
| 93 | |||
| 94 | #endif | ||
| 95 |