1/*	$NetBSD: ex_abbrev.c,v 1.3 2014/01/26 21:43:45 christos Exp $ */
2/*-
3 * Copyright (c) 1992, 1993, 1994
4 *	The Regents of the University of California.  All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 *	Keith Bostic.  All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11#include "config.h"
12
13#include <sys/cdefs.h>
14#if 0
15#ifndef lint
16static const char sccsid[] = "Id: ex_abbrev.c,v 10.10 2001/12/16 18:18:54 skimo Exp  (Berkeley) Date: 2001/12/16 18:18:54 ";
17#endif /* not lint */
18#else
19__RCSID("$NetBSD: ex_abbrev.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
20#endif
21
22#include <sys/types.h>
23#include <sys/queue.h>
24#include <sys/time.h>
25
26#include <bitstring.h>
27#include <ctype.h>
28#include <limits.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32
33#include "../common/common.h"
34#include "../vi/vi.h"
35
36/*
37 * ex_abbr -- :abbreviate [key replacement]
38 *	Create an abbreviation or display abbreviations.
39 *
40 * PUBLIC: int ex_abbr __P((SCR *, EXCMD *));
41 */
42int
43ex_abbr(SCR *sp, EXCMD *cmdp)
44{
45	CHAR_T *p;
46	size_t len;
47
48	switch (cmdp->argc) {
49	case 0:
50		if (seq_dump(sp, SEQ_ABBREV, 0) == 0)
51			msgq(sp, M_INFO, "105|No abbreviations to display");
52		return (0);
53	case 2:
54		break;
55	default:
56		abort();
57	}
58
59	/*
60	 * Check for illegal characters.
61	 *
62	 * !!!
63	 * Another fun one, historically.  See vi/v_ntext.c:txt_abbrev() for
64	 * details.  The bottom line is that all abbreviations have to end
65	 * with a "word" character, because it's the transition from word to
66	 * non-word characters that triggers the test for an abbreviation.  In
67	 * addition, because of the way the test is done, there can't be any
68	 * transitions from word to non-word character (or vice-versa) other
69	 * than between the next-to-last and last characters of the string,
70	 * and there can't be any <blank> characters.  Warn the user.
71	 */
72	if (!inword(cmdp->argv[0]->bp[cmdp->argv[0]->len - 1])) {
73		msgq(sp, M_ERR,
74		    "106|Abbreviations must end with a \"word\" character");
75			return (1);
76	}
77	for (p = cmdp->argv[0]->bp; *p != '\0'; ++p)
78		if (ISBLANK((UCHAR_T)p[0])) {
79			msgq(sp, M_ERR,
80			    "107|Abbreviations may not contain tabs or spaces");
81			return (1);
82		}
83	if (cmdp->argv[0]->len > 2)
84		for (p = cmdp->argv[0]->bp,
85		    len = cmdp->argv[0]->len - 2; len; --len, ++p)
86			if (inword(p[0]) != inword(p[1])) {
87				msgq(sp, M_ERR,
88"108|Abbreviations may not mix word/non-word characters, except at the end");
89				return (1);
90			}
91
92	if (seq_set(sp, NULL, 0, cmdp->argv[0]->bp, cmdp->argv[0]->len,
93	    cmdp->argv[1]->bp, cmdp->argv[1]->len, SEQ_ABBREV, SEQ_USERDEF))
94		return (1);
95
96	F_SET(sp->gp, G_ABBREV);
97	return (0);
98}
99
100/*
101 * ex_unabbr -- :unabbreviate key
102 *      Delete an abbreviation.
103 *
104 * PUBLIC: int ex_unabbr __P((SCR *, EXCMD *));
105 */
106int
107ex_unabbr(SCR *sp, EXCMD *cmdp)
108{
109	ARGS *ap;
110
111	ap = cmdp->argv[0];
112	if (!F_ISSET(sp->gp, G_ABBREV) ||
113	    seq_delete(sp, ap->bp, ap->len, SEQ_ABBREV)) {
114		msgq_wstr(sp, M_ERR, ap->bp,
115		    "109|\"%s\" is not an abbreviation");
116		return (1);
117	}
118	return (0);
119}
120