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
|
#include "pugixml.hpp"
#include <fstream>
#include <iomanip>
#include <iostream>
void print_doc(const char* message, const pugi::xml_document& doc, const pugi::xml_parse_result& result)
{
std::cout
<< message
<< "\t: load result '" << result.description() << "'"
<< ", first character of root name: U+" << std::hex << std::uppercase << std::setw(4) << std::setfill('0') << pugi::as_wide(doc.first_child().name())[0]
<< ", year: " << doc.first_child().first_child().first_child().child_value()
<< std::endl;
}
bool try_imbue(std::wistream& stream, const char* name)
{
try
{
stream.imbue(std::locale(name));
return true;
}
catch (const std::exception&)
{
return false;
}
}
int main()
{
pugi::xml_document doc;
{
//[code_load_stream
std::ifstream stream("weekly-utf-8.xml");
pugi::xml_parse_result result = doc.load(stream);
//]
// first character of root name: U+9031, year: 1997
print_doc("UTF8 file from narrow stream", doc, result);
}
{
std::ifstream stream("weekly-utf-16.xml");
pugi::xml_parse_result result = doc.load(stream);
// first character of root name: U+9031, year: 1997
print_doc("UTF16 file from narrow stream", doc, result);
}
{
// Since wide streams are treated as UTF-16/32 ones, you can't load the UTF-8 file from a wide stream
// directly if you have localized characters; you'll have to provide a UTF8 locale (there is no
// standard one; you can use utf8_codecvt_facet from Boost or codecvt_utf8 from C++0x)
std::wifstream stream("weekly-utf-8.xml");
if (try_imbue(stream, "en_US.UTF-8")) // try Linux encoding
{
pugi::xml_parse_result result = doc.load(stream);
// first character of root name: U+00E9, year: 1997
print_doc("UTF8 file from wide stream", doc, result);
}
else
{
std::cout << "UTF-8 locale is not available\n";
}
}
{
// Since wide streams are treated as UTF-16/32 ones, you can't load the UTF-16 file from a wide stream without
// using custom codecvt; you can use codecvt_utf16 from C++0x
}
{
// Since encoding names are non-standard, you can't load the Shift-JIS (or any other non-ASCII) file
// from a wide stream portably
std::wifstream stream("weekly-shift_jis.xml");
if (try_imbue(stream, ".932") || // try Microsoft encoding
try_imbue(stream, "ja_JP.SJIS")) // try Linux encoding; run "localedef -i ja_JP -c -f SHIFT_JIS /usr/lib/locale/ja_JP.SJIS" to get it
{
pugi::xml_parse_result result = doc.load(stream);
// first character of root name: U+9031, year: 1997
print_doc("Shift-JIS file from wide stream", doc, result);
}
else
{
std::cout << "Shift-JIS locale is not available\n";
}
}
}
|
