include/boost/url/grammar/impl/dec_octet_rule.hpp

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include/boost/url/grammar/impl/dec_octet_rule.hpp
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1 //
2 // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
3 // Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com)
4 //
5 // Distributed under the Boost Software License, Version 1.0. (See accompanying
6 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7 //
8 // Official repository: https://github.com/boostorg/url
9 //
10
11 #ifndef BOOST_URL_GRAMMAR_IMPL_DEC_OCTET_RULE_HPP
12 #define BOOST_URL_GRAMMAR_IMPL_DEC_OCTET_RULE_HPP
13
14 #include <boost/url/detail/config.hpp>
15 #include <boost/url/grammar/charset.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 namespace implementation_defined {
23
24 inline BOOST_URL_CXX20_CONSTEXPR
25 auto
26 2477 dec_octet_rule_t::
27 parse(
28 char const*& it,
29 char const* const end
30 ) const noexcept ->
31 system::result<value_type>
32 {
33
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2477 if(it == end)
34 {
35 14 BOOST_URL_CONSTEXPR_RETURN_EC(
36 error::mismatch);
37 }
38
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2463 if(! digit_chars(*it))
39 {
40 1817 BOOST_URL_CONSTEXPR_RETURN_EC(
41 error::mismatch);
42 }
43 646 unsigned v = *it - '0';
44 646 ++it;
45
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1223 if( it == end ||
46
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577 ! digit_chars(*it))
47 {
48 433 return static_cast<
49 433 value_type>(v);
50 }
51
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213 if(v == 0)
52 {
53 11 BOOST_URL_CONSTEXPR_RETURN_EC(
54 error::invalid);
55 }
56 202 v = (10 * v) + *it - '0';
57 202 ++it;
58
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400 if( it == end ||
59
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198 ! digit_chars(*it))
60 {
61 23 return static_cast<
62 23 value_type>(v);
63 }
64
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179 if(v > 25)
65 {
66 13 BOOST_URL_CONSTEXPR_RETURN_EC(
67 error::invalid);
68 }
69 166 v = (10 * v) + *it - '0';
70
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166 if(v > 255)
71 {
72 17 BOOST_URL_CONSTEXPR_RETURN_EC(
73 error::invalid);
74 }
75 149 ++it;
76
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286 if( it != end &&
77 137 digit_chars(*it))
78 {
79 7 BOOST_URL_CONSTEXPR_RETURN_EC(
80 error::invalid);
81 }
82 142 return static_cast<
83 142 value_type>(v);
84 }
85
86 } // implementation_defined
87 } // grammar
88 } // urls
89 } // boost
90
91 #endif
92