/*
Copyright (c) 2012, Broadcom Europe Ltd
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the copyright holder nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

// General command service API

#ifndef GENCMD_H
#define GENCMD_H

#include "vchost_platform_config.h"
#include "interface/vchi/vchi.h"

VCHPRE_ void VCHPOST_ vc_vchi_gencmd_init(VCHI_INSTANCE_T initialise_instance, VCHI_CONNECTION_T **connections, uint32_t num_connections );


/* Initialise general command service. Returns it's interface number. This initialises
   the host side of the interface, it does not send anything to VideoCore. */

VCHPRE_ int VCHPOST_ vc_gencmd_init(void);

/* Stop the service from being used. */

VCHPRE_ void VCHPOST_ vc_gencmd_stop(void);

/* Return the service number (-1 if not running). */
VCHPRE_ int VCHPOST_ vc_gencmd_inum(void);

/******************************************************************************
Send commands to VideoCore.
These all return 0 for success. They return VC_MSGFIFO_FIFO_FULL if there is
insufficient space for the whole message in the fifo, and none of the message is
sent.
******************************************************************************/

/*  send command to general command service */
VCHPRE_ int VCHPOST_ vc_gencmd_send( const char *format, ... );

/*  get response from general command service */
VCHPRE_ int VCHPOST_ vc_gencmd_read_response(char *response, int maxlen);

/* convenience function to send command and receive the response */
VCHPRE_ int VCHPOST_ vc_gencmd(char *response, int maxlen, const char *format, ...);

/* read part of a response from the general command service */
VCHPRE_ int VCHPOST_ vc_gencmd_read_response_partial(char *response, int nbytes);

/* if reading with vc_gencmd_read_response_partial end response reads with this */
VCHPRE_ int VCHPOST_ vc_gencmd_close_response_partial(void);

/* get state of reading of response */
VCHPRE_ int VCHPOST_ vc_gencmd_read_partial_state(void);

/******************************************************************************
Utilities to help interpret the responses.
******************************************************************************/

/* Read the value of a property=value type pair from a string (typically VideoCore's
   response to a general command). Return non-zero if found. */
VCHPRE_ int VCHPOST_ vc_gencmd_string_property(char *text, const char *property, char **value, int *length);

/* Read the numeric value of a property=number field from a response string. Return
   non-zero if found. */
VCHPRE_ int VCHPOST_ vc_gencmd_number_property(char *text, const char *property, int *number);

/* Send a command until the desired response is received, the error message is detected, or the timeout */
VCHPRE_ int VCHPOST_ vc_gencmd_until( char        *cmd,
                                      const char  *property,
                                      char        *value,
                                      const char  *error_string,
                                      int         timeout);

#endif
