#include <stdlib.h>
#include <string.h>

#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/debugXML.h>
#include <libxml/xmlversion.h>
#include <libxml/xmlmemory.h>
#include <libxml/xpath.h>
#include <libxml/valid.h>
#include <libxml/catalog.h>
#include <libxml/HTMLparser.h>
#include <libxml/xmlreader.h>


static void structured_error_callback(void *ctx, xmlErrorPtr xerror)
{
	printf("SEC: %p\n", ctx);
}

static void structuredErrorFunc(void *userData, xmlErrorPtr xerror)
{
	printf("SEF: %p\n", userData);
}

xmlSAXHandler sax_handler = {
  0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0,
  XML_SAX2_MAGIC,
  0, 0, 0, 0
};

int main(int argc, char *argv[])
{
	char a[] = "true";

	if (argc != 4) {
		printf("usage: %s XML SET_ERR_FUNC SET_CONTEXT_ERR_FUNC\n", argv[0]);
		exit(1);
	}

	xmlParserCtxtPtr ctxt = xmlCreateMemoryParserCtxt(argv[1], strlen(argv[1]));

	if (!strcmp(argv[2], a)) {
		printf("Setting xmlSetStructuredErrorFunc()\n");	
		xmlSetStructuredErrorFunc((void *)0xbadf00d, structuredErrorFunc);
	}

	ctxt->sax2 = 1;
	ctxt->userData = (void*)0xdeadbeef;

	if (ctxt->sax && ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler)
		xmlFree(ctxt->sax);

	ctxt->sax = (xmlSAXHandlerPtr) xmlMalloc(sizeof(sax_handler));
	if (ctxt->sax == NULL) {
		printf("ENOMEM\n");
		exit(1);
	}

	memcpy(ctxt->sax, &sax_handler, sizeof(sax_handler));

	if (!strcmp(argv[3], a)) {
		printf("Setting ctxt->sax->serror\n");
		ctxt->sax->serror = (xmlStructuredErrorFunc) structured_error_callback;
	}

	xmlParseDocument(ctxt);

	if (ctxt->myDoc)
		xmlFreeDoc(ctxt->myDoc);

	xmlFreeParserCtxt(ctxt);

	exit(0);
}