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/** @name Optional Tool APIs
 *  The Linux SDK for UPnP Devices contains some additional, optional 
 *  utility APIs that can be helpful in writing applications using the 
 *  SDK. These additional APIs can be compiled out in order to save code 
 *  size in the SDK. Refer to the README for details.
 */

//@{

#ifndef UPNP_TOOLS_H
#define UPNP_TOOLS_H

#include "upnp.h"


#ifdef __cplusplus
extern "C" {
#endif

/** {\bf UpnpResolveURL} combines a base URL and a relative URL into
 *  a single absolute URL.  The memory for {\bf AbsURL} needs to be
 *  allocated by the caller and must be large enough to hold the
 *  {\bf BaseURL} and {\bf RelURL} combined.
 *
 *  @return [int] An integer representing one of the following:
 *    \begin{itemize}
 *      \item {\tt UPNP_E_SUCCESS}: The operation completed successfully.
 *      \item {\tt UPNP_E_INVALID_PARAM}: {\bf RelURL} is {\tt NULL}.
 *      \item {\tt UPNP_E_INVALID_URL}: The {\bf BaseURL} / {\bf RelURL} 
 *              combination does not form a valid URL.
 *      \item {\tt UPNP_E_OUTOF_MEMORY}: Insufficient resources exist to 
 *              complete this operation.
 *    \end{itemize}
 */

EXPORT_SPEC int UpnpResolveURL(
    IN char * BaseURL,  /** The base URL to combine. */
    IN char * RelURL,   /** The relative URL to {\bf BaseURL}. */
    OUT char * AbsURL   /** A pointer to a buffer to store the 
                            absolute URL. */
    );

/** {\bf UpnpMakeAction} creates an action request packet based on its input 
 *  parameters (status variable name and value pair). Any number of input 
 *  parameters can be passed to this function but every input variable name 
 *  should have a matching value argument. 
 *   
 *  @return [IXML_Document*] The action node of {\bf Upnp_Document} type or 
 *                      {\tt NULL} if the operation failed.
 */

EXPORT_SPEC IXML_Document* UpnpMakeAction(
    IN char * ActionName,  /** The action name. */
    IN char * ServType,    /** The service type.  */
    IN int NumArg,         /** Number of argument pairs to be passed. */  
    IN char * Arg,         /** Status variable name and value pair. */
    IN ...                 /*  Other status variable name and value pairs. */
    );

/** {\bf UpnpAddToAction} creates an action request packet based on its input 
 *  parameters (status variable name and value pair). This API is specially 
 *  suitable inside a loop to add any number input parameters into an existing
 *  action. If no action document exists in the beginning then a 
 *  {\bf Upnp_Document} variable initialized with {\tt NULL} should be passed 
 *  as a parameter.
 *
 *  @return [int] An integer representing one of the following:
 *    \begin{itemize}
 *      \item {\tt UPNP_E_SUCCESS}: The operation completed successfully.
 *      \item {\tt UPNP_E_INVALID_PARAM}: One or more of the parameters 
 *                                        are invalid.
 *      \item {\tt UPNP_E_OUTOF_MEMORY}: Insufficient resources exist to 
 *              complete this operation.
 *    \end{itemize}
 */

EXPORT_SPEC int UpnpAddToAction(
        IN OUT IXML_Document ** ActionDoc, 
	                              /** A pointer to store the action 
				          document node. */
        IN char * ActionName,         /** The action name. */
        IN char * ServType,           /** The service type.  */
        IN char * ArgName,            /** The status variable name. */
        IN char * ArgVal              /** The status variable value.  */
        );

/** {\bf UpnpMakeActionResponse} creates an action response packet based 
 *  on its output parameters (status variable name and value pair). Any  
 *  number of input parameters can be passed to this function but every output
 *  variable name should have a matching value argument. 
 *   
 *  @return [IXML_Document*] The action node of {\bf Upnp_Document} type or 
 *                           {\tt NULL} if the operation failed.
 */

EXPORT_SPEC IXML_Document* UpnpMakeActionResponse(
    IN char * ActionName,  /** The action name. */
    IN char * ServType,    /** The service type.  */
    IN int NumArg,         /** The number of argument pairs passed. */  
    IN char * Arg,         /** The status variable name and value pair. */
    IN ...                 /*  Other status variable name and value pairs. */
    );

/** {\bf UpnpAddToActionResponse} creates an action response
 *  packet based on its output parameters (status variable name
 *  and value pair). This API is especially suitable inside
 *  a loop to add any number of input parameters into an existing action 
 *  response. If no action document exists in the beginning, a 
 *  {\bf Upnp_Document} variable initialized with {\tt NULL} should be passed 
 *  as a parameter.
 *
 *  @return [int] An integer representing one of the following:
 *    \begin{itemize}
 *      \item {\tt UPNP_E_SUCCESS}: The operation completed successfully.
 *      \item {\tt UPNP_E_INVALID_PARAM}: One or more of the parameters 
 *                                        are invalid.
 *      \item {\tt UPNP_E_OUTOF_MEMORY}: Insufficient resources exist to 
 *              complete this operation.
 *    \end{itemize}
 */

EXPORT_SPEC int UpnpAddToActionResponse(
        IN OUT IXML_Document ** ActionResponse, 
	                                   /** Pointer to a document to 
					       store the action document 
					       node. */
        IN char * ActionName,              /** The action name. */
        IN char * ServType,                /** The service type.  */
        IN char * ArgName,                 /** The status variable name. */
        IN char * ArgVal                   /** The status variable value.  */
        );

/** {\bf UpnpAddToPropertySet} can be used when an application needs to 
 *  transfer the status of many variables at once. It can be used 
 *  (inside a loop) to add some extra status variables into an existing
 *  property set. If the application does not already have a property
 *  set document, the application should create a variable initialized 
 *  with {\tt NULL} and pass that as the first parameter.
 *  
 *  @return [int] An integer representing one of the following:
 *    \begin{itemize}
 *      \item {\tt UPNP_E_SUCCESS}: The operation completed successfully.
 *      \item {\tt UPNP_E_INVALID_PARAM}: One or more of the parameters 
 *                                        are invalid.
 *      \item {\tt UPNP_E_OUTOF_MEMORY}: Insufficient resources exist to 
 *              complete this operation.
 *    \end{itemize}
 *
 */

EXPORT_SPEC int UpnpAddToPropertySet(
    IN OUT IXML_Document **PropSet,    
                                  /** A pointer to the document containing 
				      the property set document node. */
    IN char * ArgName,            /** The status variable name. */  
    IN char * ArgVal              /** The status variable value.  */
    );

/** {\bf UpnpCreatePropertySet} creates a property set  
 *  message packet. Any number of input parameters can be passed  
 *  to this function but every input variable name should have 
 *  a matching value input argument.
 *  
 *  @return [IXML_Document*] {\tt NULL} on failure, or the property-set 
 *                           document node.
 *
 */

EXPORT_SPEC IXML_Document* UpnpCreatePropertySet(
    IN int NumArg,  /** The number of argument pairs passed. */
    IN char* Arg,   /** The status variable name and value pair. */
    IN ...
    );

/** {\bf UpnpGetErrorMessage} converts an SDK error code into a 
 *  string error message suitable for display.  The memory returned
 *  from this function should NOT be freed.
 *
 *  @return [char*] An ASCII text string representation of the error message 
 *                  associated with the error code. 
 */

EXPORT_SPEC const char * UpnpGetErrorMessage(
        int errorcode  /** The SDK error code to convert. */
        );

//@}

#ifdef __cplusplus
}
#endif
#endif
