1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
// ----------------------------------------------------------------------------
// Copyright (C) 2002-2006 Marcin Kalicinski
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// For more information, see www.boost.org
// ----------------------------------------------------------------------------
#ifndef BOOST_PROPERTY_TREE_DETAIL_INFO_PARSER_WRITE_HPP_INCLUDED
#define BOOST_PROPERTY_TREE_DETAIL_INFO_PARSER_WRITE_HPP_INCLUDED
#include "boost/property_tree/ptree.hpp"
#include "boost/property_tree/detail/info_parser_utils.hpp"
#include <string>
namespace boost { namespace property_tree { namespace info_parser
{
template<class Ch>
void write_info_indent(std::basic_ostream<Ch> &stream,
int indent,
const info_writer_settings<Ch> &settings
)
{
stream << std::basic_string<Ch>(indent * settings.indent_count, settings.indent_char);
}
// Create necessary escape sequences from illegal characters
template<class Ch>
std::basic_string<Ch> create_escapes(const std::basic_string<Ch> &s)
{
std::basic_string<Ch> result;
typename std::basic_string<Ch>::const_iterator b = s.begin();
typename std::basic_string<Ch>::const_iterator e = s.end();
while (b != e)
{
if (*b == Ch('\0')) result += Ch('\\'), result += Ch('0');
else if (*b == Ch('\a')) result += Ch('\\'), result += Ch('a');
else if (*b == Ch('\b')) result += Ch('\\'), result += Ch('b');
else if (*b == Ch('\f')) result += Ch('\\'), result += Ch('f');
else if (*b == Ch('\n')) result += Ch('\\'), result += Ch('n');
else if (*b == Ch('\r')) result += Ch('\\'), result += Ch('r');
else if (*b == Ch('\v')) result += Ch('\\'), result += Ch('v');
else if (*b == Ch('"')) result += Ch('\\'), result += Ch('"');
else if (*b == Ch('\\')) result += Ch('\\'), result += Ch('\\');
else
result += *b;
++b;
}
return result;
}
template<class Ch>
bool is_simple_key(const std::basic_string<Ch> &key)
{
const static std::basic_string<Ch> chars = convert_chtype<Ch, char>(" \t{};\n\"");
return !key.empty() && key.find_first_of(chars) == key.npos;
}
template<class Ch>
bool is_simple_data(const std::basic_string<Ch> &data)
{
const static std::basic_string<Ch> chars = convert_chtype<Ch, char>(" \t{};\n\"");
return !data.empty() && data.find_first_of(chars) == data.npos;
}
template<class Ptree>
void write_info_helper(std::basic_ostream<typename Ptree::key_type::value_type> &stream,
const Ptree &pt,
int indent,
const info_writer_settings<typename Ptree::key_type::value_type> &settings)
{
// Character type
typedef typename Ptree::key_type::value_type Ch;
// Write data
if (indent >= 0)
{
if (!pt.data().empty())
{
std::basic_string<Ch> data = create_escapes(pt.template get_value<std::basic_string<Ch> >());
if (is_simple_data(data))
stream << Ch(' ') << data << Ch('\n');
else
stream << Ch(' ') << Ch('\"') << data << Ch('\"') << Ch('\n');
}
else if (pt.empty())
stream << Ch(' ') << Ch('\"') << Ch('\"') << Ch('\n');
else
stream << Ch('\n');
}
// Write keys
if (!pt.empty())
{
// Open brace
if (indent >= 0)
{
write_info_indent( stream, indent, settings);
stream << Ch('{') << Ch('\n');
}
// Write keys
typename Ptree::const_iterator it = pt.begin();
for (; it != pt.end(); ++it)
{
// Output key
std::basic_string<Ch> key = create_escapes(it->first);
write_info_indent( stream, indent+1, settings);
if (is_simple_key(key))
stream << key;
else
stream << Ch('\"') << key << Ch('\"');
// Output data and children
write_info_helper(stream, it->second, indent + 1, settings);
}
// Close brace
if (indent >= 0)
{
write_info_indent( stream, indent, settings);
stream << Ch('}') << Ch('\n');
}
}
}
// Write ptree to info stream
template<class Ptree>
void write_info_internal(std::basic_ostream<typename Ptree::key_type::value_type> &stream,
const Ptree &pt,
const std::string &filename,
const info_writer_settings<typename Ptree::key_type::value_type> &settings)
{
write_info_helper(stream, pt, -1, settings);
if (!stream.good())
BOOST_PROPERTY_TREE_THROW(info_parser_error("write error", filename, 0));
}
} } }
#endif
|
