src/pct_string_view.cpp

100.0% Lines (33/33) 100.0% List of functions (3/3)
pct_string_view.cpp
f(x) Functions (3)
Line TLA Hits Source Code
1 //
2 // Copyright (c) 2022 Vinnie Falco (vinnie.falco@gmail.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
11 #include <boost/url/detail/config.hpp>
12 #include <boost/url/error.hpp>
13 #include <boost/url/pct_string_view.hpp>
14 #include <boost/url/detail/decode.hpp>
15 #include <boost/url/grammar/hexdig_chars.hpp>
16 #include <boost/url/detail/except.hpp>
17
18 namespace boost {
19 namespace urls {
20
21 void
22 21044x pct_string_view::
23 decode_impl(
24 string_token::arg& dest,
25 encoding_opts opt) const
26 {
27 21044x auto p = dest.prepare(dn_);
28 21044x if(dn_ > 0)
29 19224x detail::decode_unsafe(
30 19224x p, p + dn_, s_, opt);
31 21044x }
32
33 //------------------------------------------------
34
35 9298x pct_string_view::
36 pct_string_view(
37 9298x core::string_view s)
38 : pct_string_view(
39 9298x make_pct_string_view(s
40 9298x ).value(BOOST_URL_POS))
41 {
42 9061x }
43
44 //------------------------------------------------
45
46 system::result<pct_string_view>
47 9342x make_pct_string_view(
48 core::string_view s) noexcept
49 {
50 9342x auto p = s.begin();
51 9342x auto const end = s.end();
52 9342x std::size_t dn = 0;
53 9342x if(s.size() >= 3)
54 {
55 6258x auto const safe_end = end - 2;
56 1183757x while(p < safe_end)
57 {
58 1177596x if(*p != '%')
59 {
60 954602x ++p;
61 }
62 222994x else if(
63 445902x grammar::hexdig_value(p[1]) >= 0 &&
64 222908x grammar::hexdig_value(p[2]) >= 0)
65 {
66 // percent-escape
67 222897x p += 3;
68 }
69 else
70 {
71 // invalid encoding
72 97x BOOST_URL_RETURN_EC(
73 error::bad_pct_hexdig);
74 }
75 1177499x ++dn;
76 }
77 }
78 9245x auto const n = end - p;
79 9245x if( (n >= 1 && p[0] == '%') ||
80 5359x (n >= 2 && p[1] == '%'))
81 {
82 // invalid encoding
83 143x BOOST_URL_RETURN_EC(
84 error::incomplete_encoding);
85 }
86 9102x dn += n;
87 18204x return make_pct_string_view_unsafe(
88 9102x s.data(), s.size(), dn);
89 }
90
91 } // urls
92 } // boost
93
94