#if 0
    INDI
    Copyright (C) 2003 Elwood C. Downey

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#endif

#ifndef INDI_API_H
#define INDI_API_H

/** \mainpage Instrument Neutral Distributed Interface INDI
    \section Introduction
    
    INDI is a simple XML-like communications protocol described for interactive and automated remote control of diverse instrumentation.\n
 
 INDI is small, easy to parse, and stateless. In the INDI paradigm each Device poses all command and status functions in terms of settings and getting Properties. Each Property is a vector of one or more names members. Each property has a current value vector; a target value vector; provides information about how it should be sequenced with respect to other Properties to accomplish one coordinated unit of observation; and provides hints as to how it might be displayed for interactive manipulation in a GUI.\n
 
 Clients learn the Properties of a particular Device at runtime using introspection. This decouples Client and Device implementation histories. Devices have a complete authority over whether to accept commands from Clients. INDI accommpdates intermediate servers, broadcasting, and connection topologies ranging from one-to-one on a single system to many-to-many between systems of different genre.\n
 
 The INDI protocol can be nested within other XML elements such as constraints for automatic scheduling and execution.\n
 
 For a complete review on the INDI protocol, please refer to the INDI <a href="http://www.clearskyinstitute.com/INDI/INDI">white paper</a>. 
 
\section Audience Intended Audience 

INDI is intended for developers who seek a scalable and mature API for device control and automation. Hardware drivers written under INDI can be used under any INDI-compatible client. INDI serves as a backend only, you need frontend clients to control devices. Current clients include <a href="http://edu.kde.org/kstars">KStars</a> and <a href="http://www.clearyskyinstitute.com/xephem">Xephem</a>. 

\section Development Developing under INDI

Please refere to the <a href="http://indi.sf.net">INDI Developers Manual</a> for a complete guide on INDI's driver developemnt framework. 

\section Help 

You can find information on INDI development in the <a href="http://indi.sf.net">INDI sourceforge</a> site. Furthermore, you can discuss INDI related issues on the <a href="http://sourceforge.net/mail/?group_id=90275">INDI development mailing list</a>. 

\author Elwood Downey
\author Jasem Mutlaq
*/

/** \file indiapi.h
    \brief Constants and Data structure definitions for the interface to the reference INDI C API implementation.
    \author Elwood C. Downey
*/

/*******************************************************************************
 * INDI wire protocol version implemented by this API.
 * N.B. this is indepedent of the API itself.
 */

#define	INDIV	1.2

/*******************************************************************************
 * Manifest constants
 */

/** \typedef ISState
    \brief Switch state.
*/
typedef enum {
    ISS_OFF, ISS_ON
} ISState;				/* switch state */

/** \typedef IPState
    \brief Property state.
*/
typedef enum {
    IPS_IDLE, IPS_OK, IPS_BUSY, IPS_ALERT
} IPState;				/* property state */

/** \typedef ISRule
    \brief Switch vector rule hint.
*/
typedef enum {
    ISR_1OFMANY, ISR_ATMOST1, ISR_NOFMANY
} ISRule;				/* switch vector rule hint */

/** \typedef IPerm
    \brief Permission hint, with respect to client.
*/
typedef enum {
    IP_RO, IP_WO, IP_RW
} IPerm;				/* permission hint, WRT client */

/* The XML strings for these attributes may be any length but implementations
 * are only obligued to support these lengths for the various string attributes.
 */
#define	MAXINDINAME	32
#define	MAXINDILABEL	32
#define	MAXINDIDEVICE	32
#define	MAXINDIGROUP	32
#define	MAXINDIFORMAT	32

/*******************************************************************************
 * Typedefs for each INDI Property type.
 *
 * INumber.format may be any printf-style appropriate for double
 * or style "m" to create sexigesimal using the form "%<w>.<f>m" where
 *   <w> is the total field width.
 *   <f> is the width of the fraction. valid values are:
 *      9  ->  :mm:ss.ss
 *      8  ->  :mm:ss.s
 *      6  ->  :mm:ss
 *      5  ->  :mm.m
 *      3  ->  :mm
 *
 * examples:
 *
 *   to produce     use
 *
 *    "-123:45"    %7.3m
 *  "  0:01:02"    %9.6m
 */

/** \struct IText
    \brief One text descriptor.
*/
typedef struct {		
    /** index name */	
    char name[MAXINDINAME];	
    /** short description */
    char label[MAXINDILABEL];		
    /** malloced text string */
    char *text;				
    /** pointer to parent */
    struct _ITextVectorProperty *tvp;	
    /** handy place to hang helper info */
    void *aux0;   			
    /** handy place to hang helper info */
    void *aux1;				
} IText;

/** \struct _ITextVectorProperty
    \brief Text vector property descriptor.
*/
typedef struct _ITextVectorProperty {
    /** device name */
    char device[MAXINDIDEVICE];		
    /** property name */
    char name[MAXINDINAME];		
    /** short description */
    char label[MAXINDILABEL];		
    /** GUI grouping hint */
    char group[MAXINDIGROUP];		
    /** client accessibility hint */
    IPerm p;				
    /** current max time to change, secs */
    double timeout;			
    /** current property state */
    IPState s;				
    /** texts comprising this vector */
    IText *tp;				
    /** dimension of tp[] */
    int ntp;				
    /** secs since 1/1/1970 UTC, else 0 */
    double timestamp;			
    /** handy place to hang helper info */
    void *aux;				
} ITextVectorProperty;

/** \struct INumber
    \brief One number descriptor.
*/
typedef struct {
    char name[MAXINDINAME];		/** index name */
    char label[MAXINDILABEL];		/** short description */
    char format[MAXINDIFORMAT];		/** GUI display format, see above */
    double min, max;			/** range, ignore if min == max */
    double step;			/** step size, ignore if step == 0 */
    double value;			/** current value */
    struct _INumberVectorProperty *nvp;	/** pointer to parent */
    void *aux0, *aux1;			/** handy place to hang helper info */
} INumber;

/** \struct _INumberVectorProperty
    \brief Number vector property descriptor.
    
    INumber.format may be any printf-style appropriate for double or style "m" to create sexigesimal using the form "%\<w\>.\<f\>m" where:\n
    \<w\> is the total field width.\n
    \<f\> is the width of the fraction. valid values are:\n
        9  ->  \<w\>:mm:ss.ss \n
        8  ->  \<w\>:mm:ss.s \n
        6  ->  \<w\>:mm:ss \n
        5  ->  \<w\>:mm.m \n
        3  ->  \<w\>:mm \n
	
   examples:\n 
 
   To produce "-123:45", use \%7.3m \n
   To produce "  0:01:02", use \%9.6m 
*/
typedef struct _INumberVectorProperty {
    /** device name */
    char device[MAXINDIDEVICE];		
    /** property name */
    char name[MAXINDINAME];		
    /** short description */
    char label[MAXINDILABEL];		
    /** GUI grouping hint */
    char group[MAXINDIGROUP];		
    /** client accessibility hint */
    IPerm p;				
    /** current max time to change, secs */
    double timeout;			
    /** current property state */
    IPState s;				
    /** numbers comprising this vector */
    INumber *np;			
    /** dimension of np[] */
    int nnp;				
    /** secs since 1/1/1970 UTC, else 0 */
    double timestamp;			
    /** handy place to hang helper info */
    void *aux;				
} INumberVectorProperty;

/** \struct ISwitch
    \brief One switch descriptor.
*/
typedef struct {			
    char name[MAXINDINAME];		/** index name */
    char label[MAXINDILABEL];		/** this switch's label */
    ISState s;				/** this switch's state */
    struct _ISwitchVectorProperty *svp;	/** pointer to parent */
    void *aux;				/** handy place to hang helper info */
} ISwitch;

/** \struct _ISwitchVectorProperty
    \brief Switch vector property descriptor.
*/
typedef struct _ISwitchVectorProperty {
    /** device name */
    char device[MAXINDIDEVICE];		
    /** property name */
    char name[MAXINDINAME];		
    /** short description */
    char label[MAXINDILABEL];		
    /** GUI grouping hint */
    char group[MAXINDIGROUP];		
    /** client accessibility hint */
    IPerm p;				
    /** switch behavior hint */
    ISRule r;				
    /** current max time to change, secs */
    double timeout;			
    /** current property state */
    IPState s;				
    /** switches comprising this vector */
    ISwitch *sp;			
    /** dimension of sp[] */
    int nsp;				
    /** secs since 1/1/1970 UTC, else 0 */
    double timestamp;			
    /** handy place to hang helper info */
    void *aux;				
} ISwitchVectorProperty;

/** \struct ILight
    \brief One light descriptor.
*/
typedef struct {			
    char name[MAXINDINAME];		/** index name */
    char label[MAXINDILABEL];		/** this lights's label */
    IPState s;				/** this lights's state */
    struct _ILightVectorProperty *lvp;	/** pointer to parent */
    void *aux;				/** handy place to hang helper info */
} ILight;

/** \struct _ILightVectorProperty
    \brief Light vector property descriptor.
*/
typedef struct _ILightVectorProperty {	
    /** device name */
    char device[MAXINDIDEVICE];		
    /** property name */
    char name[MAXINDINAME];		
    /** short description */
    char label[MAXINDILABEL];		
    /** GUI grouping hint */
    char group[MAXINDIGROUP];		
    /** current property state */
    IPState s;				
    /** lights comprising this vector */
    ILight *lp;				
    /** dimension of lp[] */
    int nlp;				
    /** secs since 1/1/1970 UTC, else 0 */
    double timestamp;			
    /** handy place to hang helper info */
    void *aux;				
} ILightVectorProperty;

/** \brief Handy macro to find the number of elements in array a[]. Must be used with actual array, not pointer.
*/
#define NARRAY(a)       (sizeof(a)/sizeof(a[0]))

#endif
