/* BEGIN_ICS_COPYRIGHT7 ****************************************

Copyright (c) 2015, Intel Corporation

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      this list of conditions and the following disclaimer.

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** END_ICS_COPYRIGHT7   ****************************************/

/* [ICS VERSION STRING: unknown] */

#include <stdio.h>

#include <stdlib.h>

#include <stdarg.h>

#include <unistd.h>

#include <fnmatch.h>

#include <ctype.h>

#define _GNU_SOURCE

#include <ixml.h>

/* example of simple non-predefined parser */

/* for an example of a predefined parser, see opareport/topology.c */

static void *FieldXmlParserStart(IXmlParserState_t *state, void *parent, const char **attr);

static void FieldXmlParserEnd(IXmlParserState_t *state, const IXML_FIELD *field, void *object, void *parent, XML_Char *content, unsigned len, boolean valid);

static IXML_FIELD Fields[] = {

	{ tag:"*", format:'w', subfields:Fields, start_func:FieldXmlParserStart, end_func:FieldXmlParserEnd }, // wildcard to traverse xml tree, keep all whitespace

	{ NULL }

};

static IXML_FIELD StrField = 

	{ tag:"*", format:'s', start_func:FieldXmlParserStart, end_func:FieldXmlParserEnd }; // keep all whitespace

static IXML_FIELD OtherField = 

	{ tag:"*", format:'k', start_func:FieldXmlParserStart, end_func:FieldXmlParserEnd }; // trim leading/trailing whitespace

static void *FieldXmlParserStart(IXmlParserState_t *state, void *parent, const char **attr)

{

	int i;

	const char *tag=IXmlParserGetCurrentTag(state);

	const char *parent_tag=IXmlParserGetParentTag(state);	// can be NULL at top level tag

	const char *full_tag = IXmlParserGetCurrentFullTag(state);

	if (!tag) {

		fprintf(stderr, "tag pointer is null.\n");

		return NULL;

	}

	// process attributes as needed

	printf("Start %s in %s", full_tag?full_tag:"NONE", parent_tag?parent_tag:"NONE");

	for (i = 0; attr[i]; i += 2) {

		printf(" %s='%s'", attr[i], attr[i+1]);

	}

	printf("\n");

	if (strcmp("NodeGUID", tag) == 0) {

		// example of changing parsing format

		// here is a tag we want lead/trail whitespace trimmed for

		IXmlParserSetField(state, &OtherField);

	} else if (strcmp("NodeDesc", tag) == 0) {

		// example of changing parsing format

		// here is a tag we want to keep lead/trail whitespace

		IXmlParserSetField(state, &StrField);

	} else {

		// all other tags processed via Fields which uses 'w' format

		// and hence will keep lead/trail whitespace or permit a container

	}

	return NULL;	// pointer returned here will be passed as object to ParserEnd function below

}

static void FieldXmlParserEnd(IXmlParserState_t *state, const IXML_FIELD *field, void *object, void *parent, XML_Char *content, unsigned len, boolean valid)

{

	const char *full_tag = IXmlParserGetCurrentFullTag(state);

	if (! valid) {

		// syntax error during tag (or its children tags), cleanup

		printf("Cleanup %s", full_tag?full_tag:"<nil>");

	} else {

		// depending on tag and information from Start (object), process content

		printf("End %s: '%s'\n", full_tag?full_tag:"<nil>", content?content:"<nil>");

	}

}

FSTATUS Xml2ParseInputFile(const char *input_file)

{

	if (strcmp(input_file, "-") == 0) {

		printf("Parsing stdin...\n");

		if (FSUCCESS != IXmlParseFile(stdin, "stdin", IXML_PARSER_FLAG_NONE, Fields, NULL, NULL, NULL, NULL, NULL, NULL)) {

			return FERROR;

		}

	} else {

		printf("Parsing %s...\n", input_file);

		if (FSUCCESS != IXmlParseInputFile(input_file, IXML_PARSER_FLAG_NONE, Fields, NULL, NULL, NULL, NULL, NULL, NULL)) {

			return FERROR;

		}

	}

	return FSUCCESS;

}

void Usage(void)

{

	fprintf(stderr, "Usage: xml_sample input_file\n");

	exit(2);

}

int main(int argc, char **argv)

{

	char *filename;

	if (argc != 2)

		Usage();

	filename = argv[1];

	if (!filename) {

		fprintf(stderr, "Error: null input filename\n");

		exit(2);

	}

	if (FSUCCESS == Xml2ParseInputFile(filename))

		exit(0);

	else

		exit(1);

}