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/*
 * Copyright (c) 2000-2001 Silicon Graphics, Inc.  All Rights Reserved.
 * 
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * 
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 * 
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 * 
 * http://www.sgi.com 
 * 
 * For further information regarding this notice, see: 
 * 
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */
#ifndef DLOG_H
#define DLOG_H

/* dlog.[hc] - operator dialog abstraction
 *
 * abstracts dialogs with the operator
 */

extern bool_t dlog_init( int argc, char *argv[ ] );


/* tells if dialogs are allowed;
 * will be false if invoked to right of unnamed pipe,
 * or if pipe to left breaks.
 */
extern bool_t dlog_allowed( void );


/* allows signal handler to notify dlog of broken write pipe
 */
extern void dlog_desist( void );

/* returns the dialog tty file descriptor. returns -1 if none
 */
extern intgen_t dlog_fd( void );


/* bracket a dialog session
 */
extern void dlog_begin( char *preamblestr[ ], size_t preamblecnt );
extern void dlog_end( char *postamblestr[ ], size_t postamblecnt );


/* multiple choice question abstraction. if any exception event index
 * set to IXMAX, that event will be ignored. returns index of selected
 * choice, or exception index if exception occured.
 */
extern ix_t dlog_multi_query( char *querystr[ ],	/* pre-choices output */
			      size_t querycnt,		/* length of above */
			      char *choicestr[ ],	/* choices */
			      size_t choicecnt,		/* length of above */
			      char *hilitestr,		/* to distinguish */
			      ix_t hiliteix,		/* highlighted choice */
			      char *defaultstr,		/* to distinguish */
			      ix_t defaultix,		/* return if cr */
			      time32_t timeout,		/* secs b4 giving up */
			      ix_t timeoutix,		/* return if timeout */
			      ix_t sigintix,		/* return if SIGINT */
			      ix_t sighupix,		/* return if SIGHUP */
			      ix_t sigquitix );		/* return if SIGQUIT */
extern void dlog_multi_ack( char *ackstr[ ], size_t ackcnt );

/* call the caller's callback to display whatever, using provided print
 * function, then prompt for and return an arbitrary string. two types
 * defined: pointer to the caller's function to print, and pointer to
 * function used by that function to do output. returns okix if successful,
 * timeoutix if times out, sigintix if SIGINT recieved, sighupix if SIGHUP
 * received, sigquitix if SIGQUIT received. if any of the exception indices
 * are set to IXMAX by the caller, those events will be ignored.
 */
typedef void ( * dlog_pcbp_t )( void *pctxp, char *s, ... );
typedef void ( * dlog_ucbp_t )( void *uctxp, dlog_pcbp_t pcb, void *pctxp );
extern ix_t dlog_string_query( dlog_ucbp_t ucb, /* user's print func */
			       void *uctxp,	/* user's context for above */
			       char *bufp,	/* typed string returned in */
			       size_t bufsz,	/* buffer size */
			       time32_t timeout,  /* secs b4 giving up */
			       ix_t timeoutix,  /* return if timeout */
			       ix_t sigintix,	/* return if SIGINT */
			       ix_t sighupix,	/* return if SIGHUP */
			       ix_t sigquitix,  /* return if SIGQUIT */
			       ix_t okix );     /* return if successful */
extern void dlog_string_ack( char *ackstr[ ], size_t ackcnt );

#endif /* DLOG_H */