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A simple STL based XML parser

, 16 May 2000
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This is a small non-validating XML parser based purely on STL
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  • This is a small XML parser, based purely on STL. There are two main classes XmlStream and XmlParser. XmlParser.h contains most of the parsing code. It has several state variable, which can be split up into two categories:

    1. Buffer state - Shows where we are parsing from
    2. Parsing state - Shows what we have found
    XmlParser makes extensive use of offsets to keep track of its state. This is done by design. In order to maximize speed it does not do any string copies.

    To start parsing declare an instance of the class XmlStream and setup the buffer that you want to parse. An example is included in Parser.cpp. Call parse in XmlStream, passing in a pointer to the buffer and the buffers length. You will see screen output showing what has been found. This is simple debug output and can be turned off.

    XmlNotify is used as an interface class to notify a subscriber of nodes and elements being found. There is a pointer to a subscriber in the XmlStream class. The subscriber can be set using setSubscriber.

    Notice that no XML document declaration is included nor is a schema included. If those exist in your buffer don't send them to the parser. Later, the ability to remove these, will added in the code to step through these. so this is a non-validating parser. There is one bug in the parser. When an empty node is encountered it will be reported as an element this will be fixed later. An example of this is included in the sample code.

    If you have any suggestions or improvements let me know.


    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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    About the Author

    David Hubbard

    United States United States
    No Biography provided

    Comments and Discussions

    QuestionHow to parse XML file PinmemberRajiv_cn15-Jul-08 0:05 
    Hi to Everyone,

    First Thank a lot for this code. Now I am a beginner in this XML parsing area. I want to parse an XML file so what i need to do ?

    I am looking forward from you.

    Thanks & Regards,

    GeneralHi. I want your help, David. PinmemberChoi so-dam23-Apr-08 15:38 
    NewsHere with Standard C++ only... Pinmemberpietrom14-Dec-06 6:28 
    GeneralCompiling using MinGW PinmemberEmili___3-Mar-06 3:50 
    Questionvc2005 compatibility? PinmemberBryanWilkins19-Dec-05 11:42 
    AnswerRe: vc2005 compatibility? PinmemberJeff_rowa22-Nov-06 2:24 
    GeneralW3C compliance PinmemberUmut Alev25-Jul-05 22:04 
    QuestionHow do you I get attribute value ? Pinmemberkhmerkidnow29-Jul-04 15:07 
    AnswerRe: How do you I get attribute value ? Pinmemberdbpradeep19-Mar-09 1:29 
    Generalmultiple entries of the same name Pinmemberburnettb31714-Jul-03 12:58 
    GeneralRe: multiple entries of the same name Pinmembermikeguz14-Oct-05 18:47 
    GeneralNodes have the same name BUG PinmemberKen Lee9-Apr-03 21:43 
    GeneralRe: Nodes have the same name BUG PinmemberKen Lee9-Apr-03 21:52 
    Generalpretty print of stream Pinmemberfazer777-Feb-03 19:00 
    Generalattributes Pinmemberfazer777-Feb-03 18:56 
    GeneralBug fix for null nodes PinmemberBenJeremy2-Jan-03 11:06 
    GeneralRe: Bug fix for null nodes PinmemberBenJeremy6-Jan-03 6:04 
    GeneralAnoying bug for an xml parser Pinmemberyarp21-Nov-02 21:42 
    GeneralRe: Anoying bug for an xml parser Pinmemberyarp21-Nov-02 22:17 
    GeneralSearch PinmemberDavid Frame7-Feb-02 6:18 
    GeneralRe: Search Pinmemberifgarcia20-Apr-05 22:55 
    Generalanother bug in XmlParser.h PinmemberPika28-Jul-01 0:47 
    Questionnotify on end-of-node? PinmemberChris Losinger28-Mar-01 18:44 
    AnswerRe: notify on end-of-node? Pinmembergok17-Feb-03 18:11 
    GeneralRe: notify on end-of-node? Pinmemberkhmerkidnow29-Jul-04 14:50 

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