1/*-
2 * Copyright (c) 1992, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 * Copyright (c) 1992, 1993, 1994, 1995, 1996
5 *	Keith Bostic.  All rights reserved.
6 *
7 * See the LICENSE file for redistribution information.
8 */
9
10#include "config.h"
11
12#ifndef lint
13static const char sccsid[] = "@(#)ex_abbrev.c	10.7 (Berkeley) 3/6/96";
14#endif /* not lint */
15
16#include <sys/types.h>
17#include <sys/queue.h>
18#include <sys/time.h>
19
20#include <bitstring.h>
21#include <ctype.h>
22#include <limits.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26
27#include "../common/common.h"
28#include "../vi/vi.h"
29
30/*
31 * ex_abbr -- :abbreviate [key replacement]
32 *	Create an abbreviation or display abbreviations.
33 *
34 * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
35 */
36int
37ex_abbr(sp, cmdp)
38	SCR *sp;
39	EXCMD *cmdp;
40{
41	CHAR_T *p;
42	size_t len;
43
44	switch (cmdp->argc) {
45	case 0:
46		if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
47			msgq(sp, M_INFO, "105|No abbreviations to display");
48		return (0);
49	case 2:
50		break;
51	default:
52		abort();
53	}
54
55	/*
56	 * Check for illegal characters.
57	 *
58	 * !!!
59	 * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
60	 * details.  The bottom line is that all abbreviations have to end
61	 * with a "word" character, because it's the transition from word to
62	 * non-word characters that triggers the test for an abbreviation.  In
63	 * addition, because of the way the test is done, there can't be any
64	 * transitions from word to non-word character (or vice-versa) other
65	 * than between the next-to-last and last characters of the string,
66	 * and there can't be any <blank> characters.  Warn the user.
67	 */
68	if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
69		msgq(sp, M_ERR,
70		    "106|Abbreviations must end with a \"word\" character");
71			return (1);
72	}
73	for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
74		if (isblank(p[0])) {
75			msgq(sp, M_ERR,
76			    "107|Abbreviations may not contain tabs or spaces");
77			return (1);
78		}
79	if (cmdp->argv[0]->len > 2)
80		for (p = cmdp->argv[0]->bp,
81		    len = cmdp->argv[0]->len - 2; len; --len, ++p)
82			if (inword(p[0]) != inword(p[1])) {
83				msgq(sp, M_ERR,
84"108|Abbreviations may not mix word/non-word characters, except at the end");
85				return (1);
86			}
87
88	if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
89	    cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
90		return (1);
91
92	F_SET(sp->gp, G_ABBREV);
93	return (0);
94}
95
96/*
97 * ex_unabbr -- :unabbreviate key
98 *      Delete an abbreviation.
99 *
100 * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
101 */
102int
103ex_unabbr(sp, cmdp)
104	SCR *sp;
105        EXCMD *cmdp;
106{
107	ARGS *ap;
108
109	ap = cmdp->argv[0];
110	if (!F_ISSET(sp->gp, G_ABBREV) ||
111	    seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
112		msgq_str(sp, M_ERR, ap->bp,
113		    "109|\"%s\" is not an abbreviation");
114		return (1);
115	}
116	return (0);
117}
118