xml_lookup.cpp

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/* ------------------------------------------------------------------------- */
/* file xml_lookup.cpp                                                       */
/* ------------------------------------------------------------------------- */
/*   Copyright (C) 2011 Peter Milne, D-TACQ Solutions Ltd
 *                      <Peter dot Milne at D hyphen TACQ dot com>
 *  Created on: Sep 25, 2011
 *      Author: pgm

    http://www.d-tacq.com

    This program is free software; you can redistribute it and/or modify
    it under the terms of Version 2 of the GNU General Public License
    as published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                */
/* ------------------------------------------------------------------------- */

#include <stdio.h>
#include <string.h>
#include "xmlParser.h"

#define MAXPATH 20      /* HUGE */
#define DELIM   "/"

char **path_elems;


int xml_lookup(XMLNode current, char** path, int nelems)
{
        if (nelems == 1){
                if (path[0][0] == '@'){
                        const char* value = current.getAttribute(&path[0][1]);
                        printf("value=%s\n", value);
                        return 0;
                }else{
                        XMLNode leaf = current.getChildNode(path[0]);
                        printf("%s\n", leaf.getText());
                }
        }else{
                int nc = current.nChildNode(path[0]);
                for (int ic = 0; ic != nc; ++ic){
                        xml_lookup(current.getChildNode(path[0],ic), &path[1], nelems-1);
                }       
        }
}
int xml_lookup(const char *doc, int nelems)
{
        int ii;
        int ipath = 0;
        XMLNode root = XMLNode::openFileHelper(doc, path_elems[ipath]);
        XMLNode current = root;
        int nc;

        return xml_lookup(current, &path_elems[1], nelems -1);
}

int parse_path(const char* path)
{
        char *buf = new char[strlen(path)+1];
        strcpy(buf, path);
        int nelems = 0;
        
        path_elems = new char* [MAXPATH];
        for (char* tok = buf; (tok = strtok(tok, DELIM)); tok = 0, nelems++){
                path_elems[nelems] = tok;
        }
        return nelems;
}

int main(int argc, char* argv[])
{
        if (argc != 3){
                fprintf(stderr, "USAGE: xml_lookup doc path\n");
                return -1;
        }

        
        return xml_lookup(argv[1], parse_path(argv[2]));
}