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hist.h revision 1.1.1.1 
      1 /*-
      2  * Copyright (c) 1992, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Christos Zoulas of Cornell University.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)hist.h	8.1 (Berkeley) 6/4/93
     37  */
     38 
     39 /*
     40  * el.hist.c: History functions
     41  */
     42 #ifndef _h_el_hist
     43 #define _h_el_hist
     44 
     45 #include "histedit.h"
     46 
     47 typedef const HistEvent *	(*hist_fun_t) __P((ptr_t, int, ...));
     48 
     49 typedef struct el_history_t {
     50     char *buf;				/* The history buffer		*/
     51     char *last;				/* The last character		*/
     52     int eventno;			/* Event we are looking for	*/
     53     ptr_t ref;				/* Argument for history fcns	*/
     54     hist_fun_t fun;			/* Event access			*/
     55     const HistEvent *ev;		/* Event cookie			*/
     56 } el_history_t;
     57 
     58 #define HIST_FUN(el, fn, arg)	\
     59     ((((el)->el_history.ev = \
     60        (*(el)->el_history.fun)((el)->el_history.ref, fn, arg)) == NULL) ? \
     61      NULL : (el)->el_history.ev->str)
     62 
     63 #define	HIST_NEXT(el)		HIST_FUN(el, H_NEXT, NULL)
     64 #define	HIST_FIRST(el)		HIST_FUN(el, H_FIRST, NULL)
     65 #define	HIST_LAST(el)		HIST_FUN(el, H_LAST, NULL)
     66 #define	HIST_PREV(el)		HIST_FUN(el, H_PREV, NULL)
     67 #define	HIST_EVENT(el, num)	HIST_FUN(el, H_EVENT, num)
     68 
     69 protected int 		hist_init	__P((EditLine *));
     70 protected void 		hist_end	__P((EditLine *));
     71 protected el_action_t	hist_get	__P((EditLine *));
     72 protected int		hist_set	__P((EditLine *, hist_fun_t, ptr_t));
     73 protected int		hist_list	__P((EditLine *, int, char **));
     74 
     75 #endif /* _h_el_hist */
     76