Flute acoustics: measurement, modelling and design - School of ...

APPENDIX B. PROGRAM LISTINGS 287
Listing B.21: ParseXML.c
/*
ParseXML.c
By Paul Dickens, 2006
Based on ParseXML.c by Andrew Botros, 2003
ParseXML.c reads a woodwind definition file for Impedance.c
to use in its calculation.
Refer to ParseXML.h for interface details.
*/
#include
#include
#include
#include
#include
#include
#include "Vector.h"
#include "Woodwind.h"
#include "ParseXML.h"
int parseXMLFile(char* xml_filename, Woodwind* w) {
xmlDocPtr doc; /* the resulting document tree */
/* Read and validate XML file */
if(!parseAndValidateFile(xml_filename, &doc))
return 0;
/* Build instrument */
if(!parseWoodwind(doc, w))
return 0;
/* Free XML data structure */
xmlFreeDoc(doc);
}
return 1;
int parseAndValidateFile(char* xml_filename, xmlDocPtr* doc) {
xmlParserCtxtPtr ctxt; /* the parser context */
/* create a parser context */
ctxt = xmlNewParserCtxt();
if (ctxt == NULL) {
fprintf(stderr, "XML Error: Failed to allocate parser context\n");
return 0;
}
/* parse the file, activating the DTD validation option */
*doc = xmlCtxtReadFile(ctxt, xml_filename, NULL,
XML_PARSE_DTDVALID);
/* check if parsing succeeded */
if (*doc == NULL) {
fprintf(stderr, "XML Error: Failed to parse %s\n", xml_filename);
return 0;
}