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[] = "@(#)ex_at.c 10.12 (Berkeley) 9/15/96";
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);