Small demo of TinyXml. TinyXml is a compact library that implements XML Parsing and Manipulation.

Dependencies:   mbed TINYXML

main.cpp

Committer:
wvd_vegt
Date:
2011-04-18
Revision:
0:091ca51848a0

File content as of revision 0:091ca51848a0:

#include "mbed.h"
#include "tinyxml.h"

#include <string>

//See http://www.grinninglizard.com/tinyxml/ for more information on how to use tinyxml.
//See TINYXML Library for license.
//
//TODO Document library and app in embed style.

DigitalOut myled(LED1);

int main() {

    //Setup Tx, Rx.
    Serial usb(USBTX, USBRX);
    usb.baud(115200);

    // Create the local filesystem under the name "local". 
    // DO NOT FORGET THIS CALL OR SAVING WON'T WORK!
    LocalFileSystem local("local");

    // Create some Xml to experiment on.
    const char* demoStart =
        "<?xml version=\"1.0\"  standalone='no' >\r\n"
        "<!-- Our to do list data -->\r\n"
        "<ToDo>\r\n"
        "<!-- Do I need a secure PDA? -->\r\n"
        "<Item priority=\"1\" distance='close'> Go to the <bold>Toy store!</bold></Item>\r\n"
        "<Item priority=\"2\" distance='none'> Do bills   </Item>\r\n"
        "<Item priority=\"2\" distance='far &amp; back'> Look for Evil Dinosaurs! </Item>\r\n"
        "</ToDo>\r\n";

    // Load Xml into a XmlDocument.
    TiXmlDocument doc("/local/demotest.xml");

    // Parse Xml.
    doc.Parse(demoStart);

    // Get the tagname of the Root Element (ToDo).
    // Note: doc.RootElement()->Value().c_str() is not compatible with printf! E153
    string tag = doc.RootElement()->Value();
    usb.printf("RootElement = <%s>\r\n\r\n", tag.c_str());

    // Iterate Elements with for loop.
    usb.printf("Enumerating Item Child Tags:\r\n");
    for (TiXmlNode* child = doc.RootElement()->FirstChild(); child; child = child->NextSibling() ) {
        if (child->Type()==TiXmlNode::TINYXML_ELEMENT) {
            tag = child->Value();
            usb.printf("  Child = <%s>\r\n", tag.c_str());
            usb.printf("  Text  = '%s'\r\n\r\n", child->ToElement()->GetText());
        }
    }

    //Walk Elements by FirstChildElement/NextSiblingElement.
    usb.printf("Walking Item Child Tags:\r\n");
    TiXmlElement* child = doc.RootElement()->FirstChildElement("Item");

    do {
        tag = child->Value();
        usb.printf("  Child = <%s>\r\n", tag.c_str());
        usb.printf("  Text  = '%s'\r\n\r\n", child->ToElement()->GetText());

        child = child->NextSiblingElement("Item");
    } while (child);

    //Save to a file on the /local/ filesystem on Usb.
    usb.printf("Saving with filename:\r\n");
    doc.SaveFile("/local/out_1.xml");

    //Save to a file on the /local/ filesystem on Usb.
    usb.printf("Saving with FILE:\r\n");
    FILE *fp = fopen("/local/out_2.xml", "w");
    doc.SaveFile(fp);
    fclose(fp);

    if ( doc.Error() ) {
        usb.printf( "Error in %s: %s\n", doc.Value(), doc.ErrorDesc() );

        exit( 1 );
    }

    //Print the Parsed Xml.
    usb.printf("Printing XML:\r\n");
    TiXmlPrinter printer;
    printer.SetLineBreak("\r\n"); //Default is "\n".
    doc.Accept(&printer);

    usb.printf("%s\r\n", printer.CStr());

    while (1) {
        //Wait...
    }
}