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 * Copyright (c) 2000-2003 Intel Corporation 
 * All rights reserved. 
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 * modification, are permitted provided that the following conditions are met: 
 *
 * - Redistributions of source code must retain the above copyright notice, 
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#ifndef SAMPLE_UTIL_H
#define SAMPLE_UTIL_H

/*!
 * \file
 */

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include "ithread.h"
#include "ixml.h" /* for IXML_Document, IXML_Element */
#include "upnp.h" /* for Upnp_EventType */
#include "upnptools.h"

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

#ifdef SAMPLE_UTIL_C
	/*! Service types for tv services. */
	const char *TvServiceType[] = {
		"urn:schemas-upnp-org:service:tvcontrol:1",
		"urn:schemas-upnp-org:service:tvpicture:1"
	};
#else /* SAMPLE_UTIL_C */
	extern const char *TvServiceType[];
#endif /* SAMPLE_UTIL_C */

/* mutex to control displaying of events */
extern ithread_mutex_t display_mutex;

typedef enum {
	STATE_UPDATE = 0,
	DEVICE_ADDED = 1,
	DEVICE_REMOVED = 2,
	GET_VAR_COMPLETE = 3
} eventType;

/*!
 * \brief Given a DOM node such as <Channel>11</Channel>, this routine
 * extracts the value (e.g., 11) from the node and returns it as 
 * a string. The string must be freed by the caller using free.
 *
 * \return The DOM node as a string.
 */
char *SampleUtil_GetElementValue(
	/*! [in] The DOM node from which to extract the value. */
	IXML_Element *element);

/*!
 * \brief Given a DOM node representing a UPnP Device Description Document,
 * this routine parses the document and finds the first service list
 * (i.e., the service list for the root device).  The service list
 * is returned as a DOM node list. The NodeList must be freed using
 * NodeList_free.
 *
 * \return The service list is returned as a DOM node list.
 */
IXML_NodeList *SampleUtil_GetFirstServiceList(
	/*! [in] The DOM node from which to extract the service list. */
	IXML_Document *doc); 

/*!
 * \brief Given a document node, this routine searches for the first element
 * named by the input string item, and returns its value as a string.
 * String must be freed by caller using free.
 */
char *SampleUtil_GetFirstDocumentItem(
	/*! [in] The DOM document from which to extract the value. */
	IXML_Document *doc,
	/*! [in] The item to search for. */
	const char *item); 

/*!
 * \brief Given a DOM element, this routine searches for the first element
 * named by the input string item, and returns its value as a string.
 * The string must be freed using free.
 */
char *SampleUtil_GetFirstElementItem(
	/*! [in] The DOM element from which to extract the value. */
	IXML_Element *element,
	/*! [in] The item to search for. */
	const char *item); 

/*!
 * \brief Prints a callback event type as a string.
 */
void SampleUtil_PrintEventType(
	/*! [in] The callback event. */
	Upnp_EventType S);

/*!
 * \brief Prints callback event structure details.
 */
int SampleUtil_PrintEvent(
	/*! [in] The type of callback event. */
	Upnp_EventType EventType, 
	/*! [in] The callback event structure. */
	const void *Event);

/*!
 * \brief This routine finds the first occurance of a service in a DOM
 * representation of a description document and parses it.  Note that this
 * function currently assumes that the eventURL and controlURL values in
 * the service definitions are full URLs.  Relative URLs are not handled here.
 */
int SampleUtil_FindAndParseService (
	/*! [in] The DOM description document. */
	IXML_Document *DescDoc,
	/*! [in] The location of the description document. */
	const char *location, 
	/*! [in] The type of service to search for. */
	const char *serviceType,
	/*! [out] The service ID. */
	char **serviceId, 
	/*! [out] The event URL for the service. */
	char **eventURL,
	/*! [out] The control URL for the service. */
	char **controlURL);

/*!
 * \brief Prototype for displaying strings. All printing done by the device,
 * control point, and sample util, ultimately use this to display strings 
 * to the user.
 */
typedef void (*print_string)(
	/*! [in] Format. */
	const char *string,
	/*! [in] Arguments. */
	...)
#if (__GNUC__ >= 3)
	/* This enables printf like format checking by the compiler */
	__attribute__((format (__printf__, 1, 2)))
#endif
;

/*! global print function used by sample util */
extern print_string gPrintFun;

/*!
 * \brief Prototype for passing back state changes.
 */
typedef void (*state_update)(
	/*! [in] . */
	const char *varName,
	/*! [in] . */
	const char *varValue,
	/*! [in] . */
	const char *UDN,
	/*! [in] . */
	eventType type);

/*! global state update function used by smaple util */
extern state_update gStateUpdateFun;

/*!
 * \brief Initializes the sample util. Must be called before any sample util
 * functions. May be called multiple times.
 */
int SampleUtil_Initialize(
	/*! [in] Print function to use in SampleUtil_Print. */
	print_string print_function);

/*!
 * \brief Releases Resources held by sample util.
 */
int SampleUtil_Finish();

/*!
 * \brief Function emulating printf that ultimately calls the registered print
 * function with the formatted string.
 *
 * Provides platform-specific print functionality.  This function should be
 * called when you want to print content suitable for console output (i.e.,
 * in a large text box or on a screen).  If your device/operating system is 
 * not supported here, you should add a port.
 *
 * \return The same as printf.
 */
int SampleUtil_Print(
	/*! [in] Format (see printf). */
	const char *fmt,
	/*! [in] Format data. */
	...)
#if (__GNUC__ >= 3)
	/* This enables printf like format checking by the compiler */
	__attribute__((format (__printf__, 1, 2)))
#endif
;

/*!
 * \brief
 */
int SampleUtil_RegisterUpdateFunction(
	/*! [in] . */
	state_update update_function);

/*!
 * \brief
 */
void SampleUtil_StateUpdate(
	/*! [in] . */
	const char *varName,
	/*! [in] . */
	const char *varValue,
	/*! [in] . */
	const char *UDN,
	/*! [in] . */
	eventType type);

/*!
 * \brief Prints a string to standard out.
 */
void linux_print(const char *format, ...)
#if (__GNUC__ >= 3)
	/* This enables printf like format checking by the compiler */
	__attribute__((format (__printf__, 1, 2)))
#endif
;

#ifdef __cplusplus
};
#endif /* __cplusplus */

#ifdef WIN32
	#define snprintf	_snprintf
	#define strcasecmp	stricmp
#endif

#endif /* SAMPLE_UTIL_H */

