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1 | // ---------------------------------------------------------------------------- | |
2 | // Copyright (C) 2002-2006 Marcin Kalicinski | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. | |
5 | // (See accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | // | |
8 | // For more information, see www.boost.org | |
9 | // ---------------------------------------------------------------------------- | |
10 | #ifndef BOOST_PROPERTY_TREE_DETAIL_XML_PARSER_UTILS_HPP_INCLUDED | |
11 | #define BOOST_PROPERTY_TREE_DETAIL_XML_PARSER_UTILS_HPP_INCLUDED | |
12 | ||
13 | #include <boost/property_tree/detail/ptree_utils.hpp> | |
14 | #include <boost/property_tree/detail/xml_parser_error.hpp> | |
15 | #include <boost/property_tree/detail/xml_parser_writer_settings.hpp> | |
16 | #include <string> | |
17 | #include <algorithm> | |
18 | #include <locale> | |
19 | ||
20 | namespace boost { namespace property_tree { namespace xml_parser | |
21 | { | |
22 | ||
23 | template<class Str> | |
24 | Str condense(const Str &s) | |
25 | { | |
26 | typedef typename Str::value_type Ch; | |
27 | Str r; | |
28 | std::locale loc; | |
29 | bool space = false; | |
30 | typename Str::const_iterator end = s.end(); | |
31 | for (typename Str::const_iterator it = s.begin(); | |
32 | it != end; ++it) | |
33 | { | |
34 | if (isspace(*it, loc) || *it == Ch('\n')) | |
35 | { | |
36 | if (!space) | |
37 | r += Ch(' '), space = true; | |
38 | } | |
39 | else | |
40 | r += *it, space = false; | |
41 | } | |
42 | return r; | |
43 | } | |
44 | ||
45 | ||
46 | template<class Str> | |
47 | Str encode_char_entities(const Str &s) | |
48 | { | |
49 | // Don't do anything for empty strings. | |
50 | if(s.empty()) return s; | |
51 | ||
52 | typedef typename Str::value_type Ch; | |
53 | ||
54 | Str r; | |
55 | // To properly round-trip spaces and not uglify the XML beyond | |
56 | // recognition, we have to encode them IF the text contains only spaces. | |
57 | Str sp(1, Ch(' ')); | |
58 | if(s.find_first_not_of(sp) == Str::npos) { | |
59 | // The first will suffice. | |
60 | r = detail::widen<Str>(" "); | |
61 | r += Str(s.size() - 1, Ch(' ')); | |
62 | } else { | |
63 | typename Str::const_iterator end = s.end(); | |
64 | for (typename Str::const_iterator it = s.begin(); it != end; ++it) | |
65 | { | |
66 | switch (*it) | |
67 | { | |
68 | case Ch('<'): r += detail::widen<Str>("<"); break; | |
69 | case Ch('>'): r += detail::widen<Str>(">"); break; | |
70 | case Ch('&'): r += detail::widen<Str>("&"); break; | |
71 | case Ch('"'): r += detail::widen<Str>("""); break; | |
72 | case Ch('\''): r += detail::widen<Str>("'"); break; | |
73 | default: r += *it; break; | |
74 | } | |
75 | } | |
76 | } | |
77 | return r; | |
78 | } | |
79 | ||
80 | template<class Str> | |
81 | Str decode_char_entities(const Str &s) | |
82 | { | |
83 | typedef typename Str::value_type Ch; | |
84 | Str r; | |
85 | typename Str::const_iterator end = s.end(); | |
86 | for (typename Str::const_iterator it = s.begin(); it != end; ++it) | |
87 | { | |
88 | if (*it == Ch('&')) | |
89 | { | |
90 | typename Str::const_iterator semicolon = std::find(it + 1, end, Ch(';')); | |
91 | if (semicolon == end) | |
92 | BOOST_PROPERTY_TREE_THROW(xml_parser_error("invalid character entity", "", 0)); | |
93 | Str ent(it + 1, semicolon); | |
94 | if (ent == detail::widen<Str>("lt")) r += Ch('<'); | |
95 | else if (ent == detail::widen<Str>("gt")) r += Ch('>'); | |
96 | else if (ent == detail::widen<Str>("amp")) r += Ch('&'); | |
97 | else if (ent == detail::widen<Str>("quot")) r += Ch('"'); | |
98 | else if (ent == detail::widen<Str>("apos")) r += Ch('\''); | |
99 | else | |
100 | BOOST_PROPERTY_TREE_THROW(xml_parser_error("invalid character entity", "", 0)); | |
101 | it = semicolon; | |
102 | } | |
103 | else | |
104 | r += *it; | |
105 | } | |
106 | return r; | |
107 | } | |
108 | ||
109 | template<class Str> | |
110 | const Str &xmldecl() | |
111 | { | |
112 | static Str s = detail::widen<Str>("<?xml>"); | |
113 | return s; | |
114 | } | |
115 | ||
116 | template<class Str> | |
117 | const Str &xmlattr() | |
118 | { | |
119 | static Str s = detail::widen<Str>("<xmlattr>"); | |
120 | return s; | |
121 | } | |
122 | ||
123 | template<class Str> | |
124 | const Str &xmlcomment() | |
125 | { | |
126 | static Str s = detail::widen<Str>("<xmlcomment>"); | |
127 | return s; | |
128 | } | |
129 | ||
130 | template<class Str> | |
131 | const Str &xmltext() | |
132 | { | |
133 | static Str s = detail::widen<Str>("<xmltext>"); | |
134 | return s; | |
135 | } | |
136 | ||
137 | } } } | |
138 | ||
139 | #endif |