dialog.c

来自「Gcomm is a serial communications program」· C语言 代码 · 共 137 行

#ifndef lint
static const char rcsid[] = "$Id: dialog.c,v 1.1.1.1 2001/03/08 00:01:47 efalk Exp $" ;
#endif

/*
 * Copyright (c) 1995 by Edward A. Falk
 */


/**********
 *
 *
 *	@@@@    @@@    @@@   @       @@@    @@@@  
 *	@   @    @    @   @  @      @   @  @      
 *	@   @    @    @@@@@  @      @   @  @ @@@  
 *	@   @    @    @   @  @      @   @  @   @  
 *	@@@@    @@@   @   @  @@@@@   @@@    @@@@  
 *
 *	DIALOG - Manage interactive dialogs.
 *
 *	Note: this code is non-reentrant.  That is, only one dialog can
 *	be managed at any time.
 *
 *	Routines provided here:
 *
 *
 *	void
 *	DialogStart( pats, npats, timeout, callback )
 *		Pattern	*pats ;
 *		int	npats ;
 *		int	timeout ;	(seconds)
 *		void	(*callback)() ;
 *
 *		Start dialog.  Callback function is called when any pattern is
 *		matched or timeout occurs.  Callback is called with -1 for
 *		timeout, or index of pattern that matched (0-based)
 *
 *		void
 *		callback(int which)
 *
 *	void
 *	DialogChars()
 *		Called when inputBuf has data.
 *
 *	void
 *	DialogTimeout()
 *		Called when timeout occurs.
 *
 *
 *	TODO: Convert to use standard regex() functions.
 *	TODO: Throw this away entirely and use expect.
 *
 *
 *	Edward A. Falk
 *	Sun Microsystems
 *
 *	January, 1995
 *
 *
 *
 **********/

#include <stdio.h>
#include <sys/types.h>

#include "gcomm.h"
#include "buffers.h"
#include "pattern.h"
#include "dialog.h"

/****
 *
 * Constants,  typedefs, externals, globals, statics, macros, block data
 *
 ****/




static	Pattern	*patterns ;
static	int	npats ;
static	void	(*callback)() ;

static	bool	DialogTimeout() ;



void
DialogStart(Pattern *pats, int np, int timeout, void (*cb)(int))
{
	dialogActive = 1 ;
	dialogTimeout = timeout ;
	InstallDialogTimeout(timeout*1000, DialogTimeout) ;
	patterns = pats ;
	npats = np ;
	callback = cb ;

	while( --np >= 0 )
	  PatInit(pats++) ;

	SelectTermBuf() ;
}



void
DialogChars()
{
	int	j ;
	int	c ;

	while( (c = get_buffer(&inputBuf)) != -1 )
	{
	  if( debugEcho )
	    PutTerm1(c) ;
	  for(j=0; j<npats; ++j) {
	    if( PatChar(&patterns[j], c) ) {
	      dialogActive = 0 ;
	      RemoveDialogTimeout() ;
	      SelectTermBuf() ;
	      callback(j) ;
	      return ;
	    }
	  }
	}
}


static	bool
DialogTimeout()
{
	dialogActive = 0 ;
	SelectTermBuf() ;
	callback(-1) ;
	return False ;
}