. /include/boost/url /grammar /impl /dec_octet_rule.hpp
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1   // 1   //
2   // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) 2   // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
3   // Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com) 3   // Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com)
4   // 4   //
5   // Distributed under the Boost Software License, Version 1.0. (See accompanying 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) 6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7   // 7   //
8   // Official repository: https://github.com/boostorg/url 8   // Official repository: https://github.com/boostorg/url
9   // 9   //
10   10  
11   #ifndef BOOST_URL_GRAMMAR_IMPL_DEC_OCTET_RULE_HPP 11   #ifndef BOOST_URL_GRAMMAR_IMPL_DEC_OCTET_RULE_HPP
12   #define BOOST_URL_GRAMMAR_IMPL_DEC_OCTET_RULE_HPP 12   #define BOOST_URL_GRAMMAR_IMPL_DEC_OCTET_RULE_HPP
13   13  
14   #include <boost/url/detail/config.hpp> 14   #include <boost/url/detail/config.hpp>
15   #include <boost/url/grammar/charset.hpp> 15   #include <boost/url/grammar/charset.hpp>
16   #include <boost/url/grammar/digit_chars.hpp> 16   #include <boost/url/grammar/digit_chars.hpp>
17   #include <boost/url/grammar/error.hpp> 17   #include <boost/url/grammar/error.hpp>
18   18  
19   namespace boost { 19   namespace boost {
20   namespace urls { 20   namespace urls {
21   namespace grammar { 21   namespace grammar {
22   namespace implementation_defined { 22   namespace implementation_defined {
23   23  
24   BOOST_URL_CXX20_CONSTEXPR_OR_INLINE 24   BOOST_URL_CXX20_CONSTEXPR_OR_INLINE
25   auto 25   auto
HITCBC 26   8214 dec_octet_rule_t:: 26   8214 dec_octet_rule_t::
27   parse( 27   parse(
28   char const*& it, 28   char const*& it,
29   char const* const end 29   char const* const end
30   ) const noexcept -> 30   ) const noexcept ->
31   system::result<value_type> 31   system::result<value_type>
32   { 32   {
HITCBC 33   8214 if(it == end) 33   8214 if(it == end)
34   { 34   {
35   // end 35   // end
HITCBC 36   14 BOOST_URL_CONSTEXPR_RETURN_EC( 36   14 BOOST_URL_CONSTEXPR_RETURN_EC(
37   error::mismatch); 37   error::mismatch);
38   } 38   }
HITCBC 39   8200 if(! digit_chars(*it)) 39   8200 if(! digit_chars(*it))
40   { 40   {
41   // expected DIGIT 41   // expected DIGIT
HITCBC 42   6483 BOOST_URL_CONSTEXPR_RETURN_EC( 42   6483 BOOST_URL_CONSTEXPR_RETURN_EC(
43   error::mismatch); 43   error::mismatch);
44   } 44   }
HITCBC 45   1717 unsigned v = *it - '0'; 45   1717 unsigned v = *it - '0';
HITCBC 46   1717 ++it; 46   1717 ++it;
HITCBC 47   3228 if( it == end || 47   3228 if( it == end ||
HITCBC 48   1511 ! digit_chars(*it)) 48   1511 ! digit_chars(*it))
49   { 49   {
HITCBC 50   1006 return static_cast< 50   1006 return static_cast<
HITCBC 51   1006 value_type>(v); 51   1006 value_type>(v);
52   } 52   }
HITCBC 53   711 if(v == 0) 53   711 if(v == 0)
54   { 54   {
55   // leading '0' 55   // leading '0'
HITCBC 56   11 BOOST_URL_CONSTEXPR_RETURN_EC( 56   11 BOOST_URL_CONSTEXPR_RETURN_EC(
57   error::invalid); 57   error::invalid);
58   } 58   }
HITCBC 59   700 v = (10 * v) + *it - '0'; 59   700 v = (10 * v) + *it - '0';
HITCBC 60   700 ++it; 60   700 ++it;
HITCBC 61   1380 if( it == end || 61   1380 if( it == end ||
HITCBC 62   680 ! digit_chars(*it)) 62   680 ! digit_chars(*it))
63   { 63   {
HITCBC 64   99 return static_cast< 64   99 return static_cast<
HITCBC 65   99 value_type>(v); 65   99 value_type>(v);
66   } 66   }
HITCBC 67   601 if(v > 25) 67   601 if(v > 25)
68   { 68   {
69   // integer overflow 69   // integer overflow
HITCBC 70   13 BOOST_URL_CONSTEXPR_RETURN_EC( 70   13 BOOST_URL_CONSTEXPR_RETURN_EC(
71   error::invalid); 71   error::invalid);
72   } 72   }
HITCBC 73   588 v = (10 * v) + *it - '0'; 73   588 v = (10 * v) + *it - '0';
HITCBC 74   588 if(v > 255) 74   588 if(v > 255)
75   { 75   {
76   // integer overflow 76   // integer overflow
HITCBC 77   17 BOOST_URL_CONSTEXPR_RETURN_EC( 77   17 BOOST_URL_CONSTEXPR_RETURN_EC(
78   error::invalid); 78   error::invalid);
79   } 79   }
HITCBC 80   571 ++it; 80   571 ++it;
HITCBC 81   1095 if( it != end && 81   1095 if( it != end &&
HITCBC 82   524 digit_chars(*it)) 82   524 digit_chars(*it))
83   { 83   {
84   // integer overflow 84   // integer overflow
HITCBC 85   7 BOOST_URL_CONSTEXPR_RETURN_EC( 85   7 BOOST_URL_CONSTEXPR_RETURN_EC(
86   error::invalid); 86   error::invalid);
87   } 87   }
HITCBC 88   564 return static_cast< 88   564 return static_cast<
HITCBC 89   564 value_type>(v); 89   564 value_type>(v);
90   } 90   }
91   91  
92   } // implementation_defined 92   } // implementation_defined
93   } // grammar 93   } // grammar
94   } // urls 94   } // urls
95   } // boost 95   } // boost
96   96  
97   #endif 97   #endif