1 files changed, 97 insertions, 0 deletions
diff --git a/docs/samples/load_stream.cpp b/docs/samples/load_stream.cpp
new file mode 100644
index 0000000..f982a83
--- /dev/null
+++ b/docs/samples/load_stream.cpp
@@ -0,0 +1,97 @@
+#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;
+
+    {
+    // tag::code[]
+        std::ifstream stream("weekly-utf-8.xml");
+        pugi::xml_parse_result result = doc.load(stream);
+    // end::code[]
+
+        // 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";
+        }
+    }
+}
+
+// vim:et