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 10.16 2001/06/25 15:19:14 skimo Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
27 #include "../common/common.h"
30 * ex_at -- :@[@ | buffer]
33 * Execute the contents of the buffer.
35 * PUBLIC: int ex_at __P((SCR *, EXCMD *));
38 ex_at(SCR *sp, EXCMD *cmdp)
50 * Historically, [@*]<carriage-return> and [@*][@*] executed the most
51 * recently executed buffer in ex mode.
53 name = FL_ISSET(cmdp->iflags, E_C_BUFFER) ? cmdp->buffer : '@';
54 if (name == '@' || name == '*') {
55 if (!F_ISSET(sp, SC_AT_SET)) {
56 ex_emsg(sp, NULL, EXM_NOPREVBUF);
64 CBNAME(sp, cbp, name);
66 ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF);
72 * Historically the @ command took a range of lines, and the @ buffer
73 * was executed once per line. The historic vi could be trashed by
74 * this because it didn't notice if the underlying file changed, or,
75 * for that matter, if there were no more lines on which to operate.
76 * For example, take a 10 line file, load "%delete" into a buffer,
77 * and enter :8,10@<buffer>.
79 * The solution is a bit tricky. If the user specifies a range, take
80 * the same approach as for global commands, and discard the command
81 * if exit or switch to a new file/screen. If the user doesn't specify
82 * the range, continue to execute after a file/screen switch, which
83 * means @ buffers are still useful in a multi-screen environment.
85 CALLOC_RET(sp, ecp, EXCMD *, 1, sizeof(EXCMD));
87 CALLOC_RET(sp, rp, RANGE *, 1, sizeof(RANGE));
88 rp->start = cmdp->addr1.lno;
89 if (F_ISSET(cmdp, E_ADDR_DEF)) {
91 FL_SET(ecp->agv_flags, AGV_AT_NORANGE);
93 rp->stop = cmdp->addr2.lno;
94 FL_SET(ecp->agv_flags, AGV_AT);
96 TAILQ_INSERT_HEAD(ecp->rq, rp, q);
99 * Buffers executed in ex mode or from the colon command line in vi
100 * were ex commands. We can't push it on the terminal queue, since
101 * it has to be executed immediately, and we may be in the middle of
102 * an ex command already. Push the command on the ex command stack.
103 * Build two copies of the command. We need two copies because the
104 * ex parser may step on the command string when it's parsing it.
106 TAILQ_FOREACH_REVERSE(tp, cbp->textq, _texth, q)
109 MALLOC_RET(sp, ecp->cp, CHAR_T *, len * 2 * sizeof(CHAR_T));
114 /* Copy the buffer into the command space. */
116 TAILQ_FOREACH_REVERSE(tp, cbp->textq, _texth, q) {
117 MEMCPY(p, tp->lb, tp->len);
122 SLIST_INSERT_HEAD(sp->gp->ecq, ecp, q);