GCC Code Coverage Report


Directory: libs/url/
File: boost/url/grammar/impl/unsigned_rule.hpp
Date: 2024-03-15 19:37:09
Exec Total Coverage
Lines: 34 34 100.0%
Functions: 2 2 100.0%
Branches: 36 38 94.7%

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1 //
2 // Copyright (c) 2022 Alan de Freitas (alandefreitas 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_GRAMMAR_IMPL_UNSIGNED_RULE_HPP
11 #define BOOST_URL_GRAMMAR_IMPL_UNSIGNED_RULE_HPP
12
13 #include <boost/url/grammar/error.hpp>
14 #include <boost/url/grammar/digit_chars.hpp>
15 #include <algorithm> // VFALCO grr..
16
17 namespace boost {
18 namespace urls {
19 namespace grammar {
20
21 template<class U>
22 auto
23 1693 unsigned_rule<U>::
24 parse(
25 char const*& it,
26 char const* end
27 ) const noexcept ->
28 system::result<value_type>
29 {
30
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1693 if(it == end)
31 {
32 // end
33 371 BOOST_URL_RETURN_EC(
34 error::mismatch);
35 }
36
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1322 if(*it == '0')
37 {
38 49 ++it;
39
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73 if( it == end ||
40
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24 ! digit_chars(*it))
41 {
42 43 return U(0);
43 }
44 // bad leading zero
45 6 BOOST_URL_RETURN_EC(
46 error::invalid);
47 }
48
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1273 if(! digit_chars(*it))
49 {
50 // expected digit
51 871 BOOST_URL_RETURN_EC(
52 error::mismatch);
53 }
54 static constexpr U Digits10 =
55 std::numeric_limits<
56 U>::digits10;
57 static constexpr U ten = 10;
58 char const* safe_end;
59 402 if(static_cast<std::size_t>(
60
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402 end - it) >= Digits10)
61 186 safe_end = it + Digits10;
62 else
63 216 safe_end = end;
64 402 U u = *it - '0';
65 402 ++it;
66
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1630 while(it != safe_end &&
67 700 digit_chars(*it))
68 {
69 528 char const dig = *it - '0';
70 528 u = u * ten + dig;
71 528 ++it;
72 }
73
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653 if( it != end &&
74 251 digit_chars(*it))
75 {
76 static constexpr U Max = (
77 std::numeric_limits<
78 U>::max)();
79 static constexpr
80 auto div = (Max / ten);
81 static constexpr
82 char rem = (Max % ten);
83 44 char const dig = *it - '0';
84
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44 if( u > div || (
85
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31 u == div && dig > rem))
86 {
87 // integer overflow
88 23 BOOST_URL_RETURN_EC(
89 error::invalid);
90 }
91 21 u = u * ten + dig;
92 21 ++it;
93
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28 if( it < end &&
94 7 digit_chars(*it))
95 {
96 // integer overflow
97 6 BOOST_URL_RETURN_EC(
98 error::invalid);
99 }
100 }
101
102 373 return u;
103 }
104
105 } // grammar
106 } // urls
107 } // boost
108
109 #endif
110