1 /* $OpenBSD: v_at.c,v 1.11 2016/05/27 09:18:12 martijn Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7 * Keith Bostic. All rights reserved.
8 *
9 * See the LICENSE file for redistribution information.
10 */
11
12 #include "config.h"
13
14 #include <sys/types.h>
15 #include <sys/queue.h>
16 #include <sys/time.h>
17
18 #include <bitstring.h>
19 #include <ctype.h>
20 #include <limits.h>
21 #include <stdio.h>
22
23 #include "../common/common.h"
24 #include "vi.h"
25
26 /*
27 * v_at -- @
28 * Execute a buffer.
29 *
30 * PUBLIC: int v_at(SCR *, VICMD *);
31 */
32 int
v_at(SCR * sp,VICMD * vp)33 v_at(SCR *sp, VICMD *vp)
34 {
35 CB *cbp;
36 CHAR_T name;
37 TEXT *tp;
38 size_t len;
39 char nbuf[20];
40
41 /*
42 * !!!
43 * Historically, [@*]<carriage-return> and [@*][@*] executed the most
44 * recently executed buffer in ex mode. In vi mode, only @@ repeated
45 * the last buffer. We change historic practice and make @* work from
46 * vi mode as well, it's simpler and more consistent.
47 *
48 * My intent is that *[buffer] will, in the future, pass the buffer to
49 * whatever interpreter is loaded.
50 */
51 name = F_ISSET(vp, VC_BUFFER) ? vp->buffer : '@';
52 if (name == '@' || name == '*') {
53 if (!F_ISSET(sp, SC_AT_SET)) {
54 ex_emsg(sp, NULL, EXM_NOPREVBUF);
55 return (1);
56 }
57 name = sp->at_lbuf;
58 }
59 F_SET(sp, SC_AT_SET);
60
61 CBNAME(sp, cbp, name);
62 if (cbp == NULL) {
63 ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF);
64 return (1);
65 }
66
67 /* Save for reuse. */
68 sp->at_lbuf = name;
69
70 /*
71 * The buffer is executed in vi mode, while in vi mode, so simply
72 * push it onto the terminal queue and continue.
73 *
74 * !!!
75 * Historic practice is that if the buffer was cut in line mode,
76 * <newlines> were appended to each line as it was pushed onto
77 * the stack. If the buffer was cut in character mode, <newlines>
78 * were appended to all lines but the last one.
79 *
80 * XXX
81 * Historic practice is that execution of an @ buffer could be
82 * undone by a single 'u' command, i.e. the changes were grouped
83 * together. We don't get this right; I'm waiting for the new DB
84 * logging code to be available.
85 */
86 TAILQ_FOREACH_REVERSE(tp, &cbp->textq, _texth, q)
87 if (((F_ISSET(cbp, CB_LMODE) || TAILQ_NEXT(tp, q)) &&
88 v_event_push(sp, NULL, "\n", 1, 0)) ||
89 v_event_push(sp, NULL, tp->lb, tp->len, 0))
90 return (1);
91
92 /*
93 * !!!
94 * If any count was supplied, it applies to the first command in the
95 * at buffer.
96 */
97 if (F_ISSET(vp, VC_C1SET)) {
98 len = snprintf(nbuf, sizeof(nbuf), "%lu", vp->count);
99 if (len >= sizeof(nbuf))
100 len = sizeof(nbuf) - 1;
101 if (v_event_push(sp, NULL, nbuf, len, 0))
102 return (1);
103 }
104 return (0);
105 }
106