1 /*
2  * BEGIN illumos section
3  *   This is an unstable interface; changes may be made
4  *   without notice.
5  * END illumos section
6  */
7 /***********************************************************************
8 *                                                                      *
9 *               This software is part of the ast package               *
10 *          Copyright (c) 1982-2011 AT&T Intellectual Property          *
11 *                      and is licensed under the                       *
12 *                 Eclipse Public License, Version 1.0                  *
13 *                    by AT&T Intellectual Property                     *
14 *                                                                      *
15 *                A copy of the License is available at                 *
16 *          http://www.eclipse.org/org/documents/epl-v10.html           *
17 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
18 *                                                                      *
19 *              Information and Software Systems Research               *
20 *                            AT&T Research                             *
21 *                           Florham Park NJ                            *
22 *                                                                      *
23 *                  David Korn <dgk@research.att.com>                   *
24 *                                                                      *
25 ***********************************************************************/
26 #pragma prototyped
27 #ifndef HIST_VERSION
28 /*
29  *	Interface for history mechanism
30  *	written by David Korn
31  *
32  */
33 
34 #include	<ast.h>
35 
36 #define HIST_CHAR	'!'
37 #define HIST_VERSION	1		/* history file format version no. */
38 
39 typedef struct
40 {
41 	Sfdisc_t	histdisc;	/* discipline for history */
42 	Sfio_t		*histfp;	/* history file stream pointer */
43 	char		*histname;	/* name of history file */
44 	int32_t		histind;	/* current command number index */
45 	int		histsize;	/* number of accessible history lines */
46 #ifdef _HIST_PRIVATE
47 	_HIST_PRIVATE
48 #endif /* _HIST_PRIVATE */
49 } History_t;
50 
51 typedef struct
52 {
53 	int hist_command;
54 	int hist_line;
55 	int hist_char;
56 } Histloc_t;
57 
58 /* the following are readonly */
59 extern const char	hist_fname[];
60 
61 extern int _Hist;
62 #define	hist_min(hp)	((_Hist=((int)((hp)->histind-(hp)->histsize)))>=0?_Hist:0)
63 #define	hist_max(hp)	((int)((hp)->histind))
64 /* these are the history interface routines */
65 extern int		sh_histinit(void *);
66 extern void 		hist_cancel(History_t*);
67 extern void 		hist_close(History_t*);
68 extern int		hist_copy(char*, int, int, int);
69 extern void 		hist_eof(History_t*);
70 extern Histloc_t	hist_find(History_t*,char*,int, int, int);
71 extern void 		hist_flush(History_t*);
72 extern void 		hist_list(History_t*,Sfio_t*, off_t, int, char*);
73 extern int		hist_match(History_t*,off_t, char*, int*);
74 extern off_t		hist_tell(History_t*,int);
75 extern off_t		hist_seek(History_t*,int);
76 extern char 		*hist_word(char*, int, int);
77 #if SHOPT_ESH
78     extern Histloc_t	hist_locate(History_t*,int, int, int);
79 #endif	/* SHOPT_ESH */
80 
81 #endif /* HIST_VERSION */
82