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annotate dep/pugixml/docs/samples/load_stream.cpp @ 337:a7d4e5107531

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dep/animone: REFACTOR ALL THE THINGS 1: animone now has its own syntax divergent from anisthesia, making different platforms actually have their own sections 2: process names in animone are now called `comm' (this will probably break things). this is what its called in bsd/linux so I'm just going to use it everywhere 3: the X11 code now checks for the existence of a UTF-8 window title and passes it if available 4: ANYTHING THATS NOT LINUX IS 100% UNTESTED AND CAN AND WILL BREAK! I still actually need to test the bsd code. to be honest I'm probably going to move all of the bsds into separate files because they're all essentially different operating systems at this point
author Paper <paper@paper.us.eu.org>
date Wed, 19 Jun 2024 12:51:15 -0400
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55
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1 #include "pugixml.hpp"
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2
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3 #include <fstream>
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4 #include <iomanip>
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5 #include <iostream>
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6
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7 void print_doc(const char* message, const pugi::xml_document& doc, const pugi::xml_parse_result& result)
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8 {
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9 std::cout
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10 << message
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11 << "\t: load result '" << result.description() << "'"
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12 << ", first character of root name: U+" << std::hex << std::uppercase << std::setw(4) << std::setfill('0') << pugi::as_wide(doc.first_child().name())[0]
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13 << ", year: " << doc.first_child().first_child().first_child().child_value()
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14 << std::endl;
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15 }
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16
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17 bool try_imbue(std::wistream& stream, const char* name)
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18 {
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19 try
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20 {
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21 stream.imbue(std::locale(name));
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22
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23 return true;
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24 }
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25 catch (const std::exception&)
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26 {
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27 return false;
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28 }
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29 }
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30
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31 int main()
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32 {
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33 pugi::xml_document doc;
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34
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35 {
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36 // tag::code[]
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37 std::ifstream stream("weekly-utf-8.xml");
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38 pugi::xml_parse_result result = doc.load(stream);
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39 // end::code[]
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40
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41 // first character of root name: U+9031, year: 1997
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42 print_doc("UTF8 file from narrow stream", doc, result);
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43 }
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44
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45 {
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46 std::ifstream stream("weekly-utf-16.xml");
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47 pugi::xml_parse_result result = doc.load(stream);
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48
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49 // first character of root name: U+9031, year: 1997
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50 print_doc("UTF16 file from narrow stream", doc, result);
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51 }
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52
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53 {
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54 // Since wide streams are treated as UTF-16/32 ones, you can't load the UTF-8 file from a wide stream
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55 // directly if you have localized characters; you'll have to provide a UTF8 locale (there is no
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56 // standard one; you can use utf8_codecvt_facet from Boost or codecvt_utf8 from C++0x)
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57 std::wifstream stream("weekly-utf-8.xml");
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58
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59 if (try_imbue(stream, "en_US.UTF-8")) // try Linux encoding
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60 {
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61 pugi::xml_parse_result result = doc.load(stream);
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62
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63 // first character of root name: U+00E9, year: 1997
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64 print_doc("UTF8 file from wide stream", doc, result);
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65 }
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66 else
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67 {
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68 std::cout << "UTF-8 locale is not available\n";
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69 }
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70 }
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71
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72 {
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73 // Since wide streams are treated as UTF-16/32 ones, you can't load the UTF-16 file from a wide stream without
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74 // using custom codecvt; you can use codecvt_utf16 from C++0x
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75 }
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76
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77 {
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78 // Since encoding names are non-standard, you can't load the Shift-JIS (or any other non-ASCII) file
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79 // from a wide stream portably
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80 std::wifstream stream("weekly-shift_jis.xml");
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81
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82 if (try_imbue(stream, ".932") || // try Microsoft encoding
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83 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
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84 {
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85 pugi::xml_parse_result result = doc.load(stream);
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86
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87 // first character of root name: U+9031, year: 1997
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88 print_doc("Shift-JIS file from wide stream", doc, result);
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89 }
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90 else
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91 {
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92 std::cout << "Shift-JIS locale is not available\n";
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93 }
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94 }
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95 }
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96
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97 // vim:et