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[] = "$Id: ex_abbrev.c,v 10.10 2001/12/16 18:18:54 skimo Exp $";
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(SCR *sp, EXCMD *cmdp)
38{
39	CHAR_T *p;
40	size_t len;
41
42	switch (cmdp->argc) {
43	case 0:
44		if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
45			msgq(sp, M_INFO, "105|No abbreviations to display");
46		return (0);
47	case 2:
48		break;
49	default:
50		abort();
51	}
52
53	/*
54	 * Check for illegal characters.
55	 *
56	 * !!!
57	 * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
58	 * details.  The bottom line is that all abbreviations have to end
59	 * with a "word" character, because it's the transition from word to
60	 * non-word characters that triggers the test for an abbreviation.  In
61	 * addition, because of the way the test is done, there can't be any
62	 * transitions from word to non-word character (or vice-versa) other
63	 * than between the next-to-last and last characters of the string,
64	 * and there can't be any <blank> characters.  Warn the user.
65	 */
66	if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
67		msgq(sp, M_ERR,
68		    "106|Abbreviations must end with a \"word\" character");
69			return (1);
70	}
71	for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
72		if (ISBLANK(p[0])) {
73			msgq(sp, M_ERR,
74			    "107|Abbreviations may not contain tabs or spaces");
75			return (1);
76		}
77	if (cmdp->argv[0]->len > 2)
78		for (p = cmdp->argv[0]->bp,
79		    len = cmdp->argv[0]->len - 2; len; --len, ++p)
80			if (inword(p[0]) != inword(p[1])) {
81				msgq(sp, M_ERR,
82"108|Abbreviations may not mix word/non-word characters, except at the end");
83				return (1);
84			}
85
86	if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
87	    cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
88		return (1);
89
90	F_SET(sp->gp, G_ABBREV);
91	return (0);
92}
93
94/*
95 * ex_unabbr -- :unabbreviate key
96 *      Delete an abbreviation.
97 *
98 * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
99 */
100int
101ex_unabbr(SCR *sp, EXCMD *cmdp)
102{
103	ARGS *ap;
104
105	ap = cmdp->argv[0];
106	if (!F_ISSET(sp->gp, G_ABBREV) ||
107	    seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
108		msgq_wstr(sp, M_ERR, ap->bp,
109		    "109|\"%s\" is not an abbreviation");
110		return (1);
111	}
112	return (0);
113}
114