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.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid
[] = "$Id: ex_at.c,v 10.12 1996/09/15 15:59:00 bostic Exp $ (Berkeley) $Date: 1996/09/15 15:59:00 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
19 #include <bitstring.h>
26 #include "../common/common.h"
29 * ex_at -- :@[@ | buffer]
32 * Execute the contents of the buffer.
34 * PUBLIC: int ex_at __P((SCR *, EXCMD *));
51 * Historically, [@*]<carriage-return> and [@*][@*] executed the most
52 * recently executed buffer in ex mode.
54 name
= FL_ISSET(cmdp
->iflags
, E_C_BUFFER
) ? cmdp
->buffer
: '@';
55 if (name
== '@' || name
== '*') {
56 if (!F_ISSET(sp
, SC_AT_SET
)) {
57 ex_emsg(sp
, NULL
, EXM_NOPREVBUF
);
65 CBNAME(sp
, cbp
, name
);
67 ex_emsg(sp
, KEY_NAME(sp
, name
), EXM_EMPTYBUF
);
73 * Historically the @ command took a range of lines, and the @ buffer
74 * was executed once per line. The historic vi could be trashed by
75 * this because it didn't notice if the underlying file changed, or,
76 * for that matter, if there were no more lines on which to operate.
77 * For example, take a 10 line file, load "%delete" into a buffer,
78 * and enter :8,10@<buffer>.
80 * The solution is a bit tricky. If the user specifies a range, take
81 * the same approach as for global commands, and discard the command
82 * if exit or switch to a new file/screen. If the user doesn't specify
83 * the range, continue to execute after a file/screen switch, which
84 * means @ buffers are still useful in a multi-screen environment.
86 CALLOC_RET(sp
, ecp
, EXCMD
*, 1, sizeof(EXCMD
));
87 CIRCLEQ_INIT(&ecp
->rq
);
88 CALLOC_RET(sp
, rp
, RANGE
*, 1, sizeof(RANGE
));
89 rp
->start
= cmdp
->addr1
.lno
;
90 if (F_ISSET(cmdp
, E_ADDR_DEF
)) {
92 FL_SET(ecp
->agv_flags
, AGV_AT_NORANGE
);
94 rp
->stop
= cmdp
->addr2
.lno
;
95 FL_SET(ecp
->agv_flags
, AGV_AT
);
97 CIRCLEQ_INSERT_HEAD(&ecp
->rq
, rp
, q
);
100 * Buffers executed in ex mode or from the colon command line in vi
101 * were ex commands. We can't push it on the terminal queue, since
102 * it has to be executed immediately, and we may be in the middle of
103 * an ex command already. Push the command on the ex command stack.
104 * Build two copies of the command. We need two copies because the
105 * ex parser may step on the command string when it's parsing it.
107 for (len
= 0, tp
= cbp
->textq
.cqh_last
;
108 tp
!= (void *)&cbp
->textq
; tp
= tp
->q
.cqe_prev
)
111 MALLOC_RET(sp
, ecp
->cp
, char *, len
* 2);
116 /* Copy the buffer into the command space. */
117 for (p
= ecp
->cp
+ len
, tp
= cbp
->textq
.cqh_last
;
118 tp
!= (void *)&cbp
->textq
; tp
= tp
->q
.cqe_prev
) {
119 memcpy(p
, tp
->lb
, tp
->len
);
124 LIST_INSERT_HEAD(&sp
->gp
->ecq
, ecp
, q
);