/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * XSEC
 *
 * c14n := tool to dump a XML file to the console after canonacalising it thru
 *			c14n
 *
 * $Id: c14n.cpp 351394 2005-07-22 09:55:31Z blautenb $
 *
 */

//XSEC includes



//#include <Include/PlatformDefinitions.hpp>
//#include <cassert>

#include <memory.h>
#include <string.h>
#include <iostream>
#include <stdlib.h>

#include <xercesc/util/PlatformUtils.hpp>
#include <xercesc/util/XMLString.hpp>
#include <xercesc/dom/DOM.hpp>
#include <xercesc/parsers/XercesDOMParser.hpp>
#include <xercesc/util/XMLException.hpp>

// XSEC

#include <xsec/canon/XSECC14n20010315.hpp>
#include <xsec/utils/XSECNameSpaceExpander.hpp>
#include <xsec/utils/XSECPlatformUtils.hpp>

XERCES_CPP_NAMESPACE_USE

using std::endl;
using std::cout;
using std::cerr;

void printUsage(void) {

	cerr << "\nUsage: c14n [-n] <input file name>\n";
	cerr << "       -n = No comments\n\n";

}

int main(int argc, char **argv) {

	bool printComments = true;		// By default print comments

	// Check arguments

	if (argc < 2) {

		printUsage();
		exit (1);
	}

	if (argc > 2) {

		for (int i = 1; i < argc - 1; ++i) {

			if (!strcmp(argv[i], "-n") || !strcmp(argv[i], "-N"))
				printComments = false;
			else {
				cerr << "Unknown option %s\n\n";
				printUsage();
				exit (1);
			}
		}
	}

				

	// Initialise the XML system

	try {

		XMLPlatformUtils::Initialize();
		XSECPlatformUtils::Initialise();

	}
	catch (const XMLException &e) {

		cerr << "Error during initialisation of Xerces" << endl;
		cerr << "Error Message = : "
		     << e.getMessage() << endl;

	}

	// Create and set up the parser

	XercesDOMParser * parser = new XercesDOMParser;
	parser->setDoNamespaces(true);
	parser->setValidationScheme(XercesDOMParser::Val_Never);
	parser->setDoSchema(false);
	parser->setCreateEntityReferenceNodes(false);

	// Now parse out file

	bool errorsOccured = false;
	int errorCount = 0;
    try
    {
    	parser->parse(argv[argc-1]);
        errorCount = parser->getErrorCount();
        if (errorCount > 0)
            errorsOccured = true;
    }

    catch (const XMLException& e)
    {
        cerr << "An error occured during parsing\n   Message: "
             << e.getMessage() << endl;
        errorsOccured = true;
    }


    catch (const DOMException& e)
    {
       cerr << "A DOM error occured during parsing\n   DOMException code: "
             << e.code << endl;
        errorsOccured = true;
    }

	if (errorsOccured) {

		cout << "Errors during parse" << endl;
		exit (1);

	}

	/*

		Now that we have the parsed file, get the DOM document and start looking at it

	*/
	
	DOMNode *doc;		// The document that we parsed

	doc = parser->getDocument();
	DOMDocument *theDOM = parser->getDocument();

	// Creat the canonicalizer

	XSECC14n20010315 canon(theDOM);
	canon.setCommentsProcessing(printComments);
	canon.setUseNamespaceStack(true);

	// canon.XPathSelectNodes("(/descendant-or-self::node() | /descendant-or-self::node()/attribute::* | /descendant-or-self::node()/namespace::*)[ self::ietf:e1 or (parent::ietf:e1 and not(self::text() or self::e2)) or count (id(\"E3\") | ancestor-or-self::node()) = count (ancestor-or-self::node())]");

	char buffer[512];
	int res = canon.outputBuffer((unsigned char *) buffer, 128);


	while (res != 0) {
		buffer[res] = '\0';
		cout << buffer;
		res = canon.outputBuffer((unsigned char *) buffer, 128);
	}

	cout << endl;
	
	return 0;
}