From 6d0f60a808f419d6acaf54f020b2d53a00d843ba Mon Sep 17 00:00:00 2001
From: "arseny.kapoulkine"
 <arseny.kapoulkine@99668b35-9821-0410-8761-19e4c4f06640>
Date: Thu, 8 Jul 2010 04:34:03 +0000
Subject: docs: Added document modification documentation

git-svn-id: http://pugixml.googlecode.com/svn/trunk@574 99668b35-9821-0410-8761-19e4c4f06640
---
 docs/samples/include.cpp | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 docs/samples/include.cpp

(limited to 'docs/samples/include.cpp')

diff --git a/docs/samples/include.cpp b/docs/samples/include.cpp
new file mode 100644
index 0000000..528d016
--- /dev/null
+++ b/docs/samples/include.cpp
@@ -0,0 +1,62 @@
+#include "pugixml.hpp"
+
+#include <string.h>
+#include <iostream>
+
+//[code_include
+bool load_preprocess(pugi::xml_document& doc, const char* path);
+
+bool preprocess(pugi::xml_node node)
+{
+	for (pugi::xml_node child = node.first_child(); child; )
+	{
+		if (child.type() == pugi::node_pi && strcmp(child.name(), "include") == 0)
+		{
+			pugi::xml_node include = child;
+
+			// load new preprocessed document (note: ideally this should handle relative paths)
+			const char* path = include.value();
+
+			pugi::xml_document doc;
+			if (!load_preprocess(doc, path)) return false;
+
+			// insert the comment marker above include directive
+			node.insert_child_before(pugi::node_comment, include).set_value(path);
+
+			// copy the document above the include directive (this retains the original order!)
+			for (pugi::xml_node ic = doc.first_child(); ic; ic = ic.next_sibling())
+			{
+				node.insert_copy_before(ic, include);
+			}
+
+			// remove the include node and move to the next child
+			child = child.next_sibling();
+
+			node.remove_child(include);
+		}
+		else
+		{
+			if (!preprocess(child)) return false;
+
+			child = child.next_sibling();
+		}
+	}
+
+	return true;
+}
+
+bool load_preprocess(pugi::xml_document& doc, const char* path)
+{
+	pugi::xml_parse_result result = doc.load_file(path, pugi::parse_default | pugi::parse_pi); // for <?include?>
+	
+	return result ? preprocess(doc) : false;
+}
+//]
+
+int main()
+{
+	pugi::xml_document doc;
+	if (!load_preprocess(doc, "character.xml")) return -1;
+
+	doc.print(std::cout);
+}
-- 
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