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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_INFO_PARSER_WRITE_HPP_INCLUDED | |
11 | #define BOOST_PROPERTY_TREE_DETAIL_INFO_PARSER_WRITE_HPP_INCLUDED | |
12 | ||
13 | #include "boost/property_tree/ptree.hpp" | |
14 | #include "boost/property_tree/detail/info_parser_utils.hpp" | |
15 | #include <string> | |
16 | ||
17 | namespace boost { namespace property_tree { namespace info_parser | |
18 | { | |
19 | template<class Ch> | |
20 | void write_info_indent(std::basic_ostream<Ch> &stream, | |
21 | int indent, | |
22 | const info_writer_settings<Ch> &settings | |
23 | ) | |
24 | { | |
25 | stream << std::basic_string<Ch>(indent * settings.indent_count, settings.indent_char); | |
26 | } | |
27 | ||
28 | // Create necessary escape sequences from illegal characters | |
29 | template<class Ch> | |
30 | std::basic_string<Ch> create_escapes(const std::basic_string<Ch> &s) | |
31 | { | |
32 | std::basic_string<Ch> result; | |
33 | typename std::basic_string<Ch>::const_iterator b = s.begin(); | |
34 | typename std::basic_string<Ch>::const_iterator e = s.end(); | |
35 | while (b != e) | |
36 | { | |
37 | if (*b == Ch('\0')) result += Ch('\\'), result += Ch('0'); | |
38 | else if (*b == Ch('\a')) result += Ch('\\'), result += Ch('a'); | |
39 | else if (*b == Ch('\b')) result += Ch('\\'), result += Ch('b'); | |
40 | else if (*b == Ch('\f')) result += Ch('\\'), result += Ch('f'); | |
41 | else if (*b == Ch('\n')) result += Ch('\\'), result += Ch('n'); | |
42 | else if (*b == Ch('\r')) result += Ch('\\'), result += Ch('r'); | |
43 | else if (*b == Ch('\v')) result += Ch('\\'), result += Ch('v'); | |
44 | else if (*b == Ch('"')) result += Ch('\\'), result += Ch('"'); | |
45 | else if (*b == Ch('\\')) result += Ch('\\'), result += Ch('\\'); | |
46 | else | |
47 | result += *b; | |
48 | ++b; | |
49 | } | |
50 | return result; | |
51 | } | |
52 | ||
53 | template<class Ch> | |
54 | bool is_simple_key(const std::basic_string<Ch> &key) | |
55 | { | |
56 | const static std::basic_string<Ch> chars = convert_chtype<Ch, char>(" \t{};\n\""); | |
57 | return !key.empty() && key.find_first_of(chars) == key.npos; | |
58 | } | |
59 | ||
60 | template<class Ch> | |
61 | bool is_simple_data(const std::basic_string<Ch> &data) | |
62 | { | |
63 | const static std::basic_string<Ch> chars = convert_chtype<Ch, char>(" \t{};\n\""); | |
64 | return !data.empty() && data.find_first_of(chars) == data.npos; | |
65 | } | |
66 | ||
67 | template<class Ptree> | |
68 | void write_info_helper(std::basic_ostream<typename Ptree::key_type::value_type> &stream, | |
69 | const Ptree &pt, | |
70 | int indent, | |
71 | const info_writer_settings<typename Ptree::key_type::value_type> &settings) | |
72 | { | |
73 | ||
74 | // Character type | |
75 | typedef typename Ptree::key_type::value_type Ch; | |
76 | ||
77 | // Write data | |
78 | if (indent >= 0) | |
79 | { | |
80 | if (!pt.data().empty()) | |
81 | { | |
82 | std::basic_string<Ch> data = create_escapes(pt.template get_value<std::basic_string<Ch> >()); | |
83 | if (is_simple_data(data)) | |
84 | stream << Ch(' ') << data << Ch('\n'); | |
85 | else | |
86 | stream << Ch(' ') << Ch('\"') << data << Ch('\"') << Ch('\n'); | |
87 | } | |
88 | else if (pt.empty()) | |
89 | stream << Ch(' ') << Ch('\"') << Ch('\"') << Ch('\n'); | |
90 | else | |
91 | stream << Ch('\n'); | |
92 | } | |
93 | ||
94 | // Write keys | |
95 | if (!pt.empty()) | |
96 | { | |
97 | ||
98 | // Open brace | |
99 | if (indent >= 0) | |
100 | { | |
101 | write_info_indent( stream, indent, settings); | |
102 | stream << Ch('{') << Ch('\n'); | |
103 | } | |
104 | ||
105 | // Write keys | |
106 | typename Ptree::const_iterator it = pt.begin(); | |
107 | for (; it != pt.end(); ++it) | |
108 | { | |
109 | ||
110 | // Output key | |
111 | std::basic_string<Ch> key = create_escapes(it->first); | |
112 | write_info_indent( stream, indent+1, settings); | |
113 | if (is_simple_key(key)) | |
114 | stream << key; | |
115 | else | |
116 | stream << Ch('\"') << key << Ch('\"'); | |
117 | ||
118 | // Output data and children | |
119 | write_info_helper(stream, it->second, indent + 1, settings); | |
120 | ||
121 | } | |
122 | ||
123 | // Close brace | |
124 | if (indent >= 0) | |
125 | { | |
126 | write_info_indent( stream, indent, settings); | |
127 | stream << Ch('}') << Ch('\n'); | |
128 | } | |
129 | ||
130 | } | |
131 | } | |
132 | ||
133 | // Write ptree to info stream | |
134 | template<class Ptree> | |
135 | void write_info_internal(std::basic_ostream<typename Ptree::key_type::value_type> &stream, | |
136 | const Ptree &pt, | |
137 | const std::string &filename, | |
138 | const info_writer_settings<typename Ptree::key_type::value_type> &settings) | |
139 | { | |
140 | write_info_helper(stream, pt, -1, settings); | |
141 | if (!stream.good()) | |
142 | BOOST_PROPERTY_TREE_THROW(info_parser_error("write error", filename, 0)); | |
143 | } | |
144 | ||
145 | } } } | |
146 | ||
147 | #endif |