/* Copyright and license information is at the end of the file */

#ifndef XMLRPC_XMLPARSER_H_INCLUDED
#define XMLRPC_XMLPARSER_H_INCLUDED

/*=========================================================================
**  Abstract XML Parser Interface
**=========================================================================
**  This file provides an abstract interface to the XML parser. For now,
**  this interface is implemented by expat, but feel free to change it
**  if necessary.
*/


/*=========================================================================
**  xml_element
**=========================================================================
**  This data structure represents an XML element. We provide no more API
**  than we'll need in xmlrpc_parse.c.
**
**  The pointers returned by the various accessor methods belong to the
**  xml_element structure. Do not free them, and do not use them after
**  the xml_element has been destroyed.
*/

/* You'll need to finish defining struct _xml_element elsewhere. */
typedef struct _xml_element xml_element;

/* Destroy an xml_element. */
void xml_element_free (xml_element * const elem);

/* Return a pointer to the element's name. Do not free this pointer!
** This pointer should point to standard ASCII or UTF-8 data. */
const char *
xml_element_name(const xml_element * const elemP);

/* Return the xml_element's CDATA. Do not free this pointer!
** This pointer should point to standard ASCII or UTF-8 data.
** The implementation is allowed to concatenate all the CDATA in the
** element regardless of child elements. Alternatively, if there are
** any child elements, the implementation is allowed to dispose
** of whitespace characters.
** The value returned by xml_element_cdata should be '\0'-terminated
** (although it may contain other '\0' characters internally).
** xml_element_cdata_size should not include the final '\0'. */
size_t xml_element_cdata_size (xml_element *elem);
char *xml_element_cdata (xml_element *elem);

/* Return the xml_element's child elements. Do not free this pointer! */
size_t
xml_element_children_size(const xml_element * const elemP);

xml_element **
xml_element_children(const xml_element * const elemP);


/*=========================================================================
**  xml_parse
**=========================================================================
**  Parse a chunk of XML data and return the top-level element. If this
**  routine fails, it will return NULL and set up the env appropriately.
**  You are responsible for calling xml_element_free on the returned pointer.
*/

void
xml_parse(xmlrpc_env *   const envP,
          const char *   const xmlData,
          size_t         const xmlDataLen,
          xml_element ** const resultPP);

/* Initialize and terminate static global parser state.  This should be done
   once per run of a program, and while the program is just one thread.
*/
void
xml_init(xmlrpc_env * const envP);

void
xml_term(void);


/* Copyright (C) 2001 by First Peer, Inc. All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
** 1. Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in the
**    documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
**    derived from this software without specific prior written permission. 
**  
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
** SUCH DAMAGE. */

#endif
