1   
//
1   
//
2   
// Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com)
2   
// Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com)
3   
//
3   
//
4   
// Distributed under the Boost Software License, Version 1.0. (See accompanying
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)
5   
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6   
//
6   
//
7   
// Official repository: https://github.com/boostorg/url
7   
// Official repository: https://github.com/boostorg/url
8   
//
8   
//
9  
9  
10  
10  
11   
#include <boost/url/detail/config.hpp>
11   
#include <boost/url/detail/config.hpp>
12   
#include <boost/url/decode_view.hpp>
12   
#include <boost/url/decode_view.hpp>
13   
#include <boost/url/grammar/hexdig_chars.hpp>
13   
#include <boost/url/grammar/hexdig_chars.hpp>
14   
#include <ostream>
14   
#include <ostream>
15  
15  
16   
namespace boost {
16   
namespace boost {
17   
namespace urls {
17   
namespace urls {
18  
18  
19   
//------------------------------------------------
19   
//------------------------------------------------
20  
20  
21   
auto
21   
auto
22   
decode_view::
22   
decode_view::
23   
iterator::
23   
iterator::
24   
operator*() const noexcept ->
24   
operator*() const noexcept ->
25   
    reference
25   
    reference
26   
{
26   
{
27   
    if (space_as_plus_ &&
27   
    if (space_as_plus_ &&
28   
        *pos_ == '+')
28   
        *pos_ == '+')
29   
        return ' ';
29   
        return ' ';
30   
    if (*pos_ != '%')
30   
    if (*pos_ != '%')
31   
        return *pos_;
31   
        return *pos_;
32   
    auto d0 = grammar::hexdig_value(pos_[1]);
32   
    auto d0 = grammar::hexdig_value(pos_[1]);
33   
    auto d1 = grammar::hexdig_value(pos_[2]);
33   
    auto d1 = grammar::hexdig_value(pos_[2]);
34   
    return static_cast<char>(
34   
    return static_cast<char>(
35   
        ((static_cast<
35   
        ((static_cast<
36   
              unsigned char>(d0) << 4) +
36   
              unsigned char>(d0) << 4) +
37   
         (static_cast<
37   
         (static_cast<
38   
             unsigned char>(d1))));
38   
             unsigned char>(d1))));
39   
}
39   
}
40  
40  
41   
void
41   
void
42   
decode_view::
42   
decode_view::
43   
write(std::ostream& os) const
43   
write(std::ostream& os) const
44   
{
44   
{
45   
    auto it = begin();
45   
    auto it = begin();
46   
    auto const end_ = end();
46   
    auto const end_ = end();
47   
    while(it != end_)
47   
    while(it != end_)
48   
        os.put(*it++);
48   
        os.put(*it++);
49   
}
49   
}
50  
50  
51   
void
51   
void
52   
decode_view::
52   
decode_view::
53   
remove_prefix( size_type n )
53   
remove_prefix( size_type n )
54   
{
54   
{
55   
    BOOST_ASSERT(n <= dn_);
55   
    BOOST_ASSERT(n <= dn_);
56   
    auto it = begin();
56   
    auto it = begin();
57   
    auto n0 = n;
57   
    auto n0 = n;
58   
    while (n)
58   
    while (n)
59   
    {
59   
    {
60   
        ++it;
60   
        ++it;
61   
        --n;
61   
        --n;
62   
    }
62   
    }
63   
    n_ -= (it.base() - begin().base());
63   
    n_ -= (it.base() - begin().base());
64   
    dn_ -= n0;
64   
    dn_ -= n0;
65   
    p_ = it.base();
65   
    p_ = it.base();
66   
}
66   
}
67  
67  
68   
void
68   
void
69   
decode_view::
69   
decode_view::
70   
remove_suffix( size_type n )
70   
remove_suffix( size_type n )
71   
{
71   
{
72   
    BOOST_ASSERT(n <= dn_);
72   
    BOOST_ASSERT(n <= dn_);
73   
    auto it = end();
73   
    auto it = end();
74   
    auto n0 = n;
74   
    auto n0 = n;
75   
    while (n)
75   
    while (n)
76   
    {
76   
    {
77   
        --it;
77   
        --it;
78   
        --n;
78   
        --n;
79   
    }
79   
    }
80   
    n_ -= (end().base() - it.base());
80   
    n_ -= (end().base() - it.base());
81   
    dn_ -= n0;
81   
    dn_ -= n0;
82   
}
82   
}
83  
83  
84   
bool
84   
bool
85   
decode_view::
85   
decode_view::
86   
starts_with( core::string_view s ) const noexcept
86   
starts_with( core::string_view s ) const noexcept
87   
{
87   
{
88   
    if (s.size() > size())
88   
    if (s.size() > size())
89   
        return false;
89   
        return false;
90   
    auto it0 = begin();
90   
    auto it0 = begin();
91   
    auto it1 = s.begin();
91   
    auto it1 = s.begin();
92   
    std::size_t n = s.size();
92   
    std::size_t n = s.size();
93   
    while (n)
93   
    while (n)
94   
    {
94   
    {
95   
        if (*it0 != *it1)
95   
        if (*it0 != *it1)
96   
            return false;
96   
            return false;
97   
        ++it0;
97   
        ++it0;
98   
        ++it1;
98   
        ++it1;
99   
        --n;
99   
        --n;
100   
    }
100   
    }
101   
    return true;
101   
    return true;
102   
}
102   
}
103  
103  
104   
bool
104   
bool
105   
decode_view::
105   
decode_view::
106   
ends_with( core::string_view s ) const noexcept
106   
ends_with( core::string_view s ) const noexcept
107   
{
107   
{
108   
    if (s.size() > size())
108   
    if (s.size() > size())
109   
        return false;
109   
        return false;
110   
    auto it0 = end();
110   
    auto it0 = end();
111   
    auto it1 = s.end();
111   
    auto it1 = s.end();
112   
    std::size_t n = s.size();
112   
    std::size_t n = s.size();
113   
    --it0;
113   
    --it0;
114   
    --it1;
114   
    --it1;
115   
    while (n - 1)
115   
    while (n - 1)
116   
    {
116   
    {
117   
        if (*it0 != *it1)
117   
        if (*it0 != *it1)
118   
            return false;
118   
            return false;
119   
        --it0;
119   
        --it0;
120   
        --it1;
120   
        --it1;
121   
        --n;
121   
        --n;
122   
    }
122   
    }
123   
    return *it0 == *it1;
123   
    return *it0 == *it1;
124   
}
124   
}
125  
125  
126   
bool
126   
bool
127   
decode_view::
127   
decode_view::
128   
starts_with( char ch ) const noexcept
128   
starts_with( char ch ) const noexcept
129   
{
129   
{
130   
    return
130   
    return
131   
        !empty() &&
131   
        !empty() &&
132   
        front() == ch;
132   
        front() == ch;
133   
}
133   
}
134  
134  
135   
bool
135   
bool
136   
decode_view::
136   
decode_view::
137   
ends_with( char ch ) const noexcept
137   
ends_with( char ch ) const noexcept
138   
{
138   
{
139   
    return
139   
    return
140   
        !empty() &&
140   
        !empty() &&
141   
        back() == ch;
141   
        back() == ch;
142   
}
142   
}
143  
143  
144   
decode_view::const_iterator
144   
decode_view::const_iterator
145   
decode_view::
145   
decode_view::
146   
find( char ch ) const noexcept
146   
find( char ch ) const noexcept
147   
{
147   
{
148   
    auto it = begin();
148   
    auto it = begin();
149   
    auto end = this->end();
149   
    auto end = this->end();
150   
    while (it != end)
150   
    while (it != end)
151   
    {
151   
    {
152   
        if (*it == ch)
152   
        if (*it == ch)
153   
            return it;
153   
            return it;
154   
        ++it;
154   
        ++it;
155   
    }
155   
    }
156   
    return it;
156   
    return it;
157   
}
157   
}
158  
158  
159   
decode_view::const_iterator
159   
decode_view::const_iterator
160   
decode_view::
160   
decode_view::
161   
rfind( char ch ) const noexcept
161   
rfind( char ch ) const noexcept
162   
{
162   
{
163   
    if (empty())
163   
    if (empty())
164   
        return end();
164   
        return end();
165   
    auto it = end();
165   
    auto it = end();
166   
    auto begin = this->begin();
166   
    auto begin = this->begin();
167   
    --it;
167   
    --it;
168   
    while (it != begin)
168   
    while (it != begin)
169   
    {
169   
    {
170   
        if (*it == ch)
170   
        if (*it == ch)
171   
            return it;
171   
            return it;
172   
        --it;
172   
        --it;
173   
    }
173   
    }
174   
    if (*it == ch)
174   
    if (*it == ch)
175   
        return it;
175   
        return it;
176   
    return end();
176   
    return end();
177   
}
177   
}
178  
178  
179   
} // urls
179   
} // urls
180   
} // boost
180   
} // boost
181  
181