128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
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* Keith Bostic. All rights reserved.
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*
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* See the LICENSE file for redistribution information.
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*/
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#include "config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)ex_at.c 10.10 (Berkeley) 4/27/96";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <bitstring.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../common/common.h"
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/*
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* ex_at -- :@[@ | buffer]
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* :*[* | buffer]
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*
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* Execute the contents of the buffer.
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*
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* PUBLIC: int ex_at __P((SCR *, EXCMD *));
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*/
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int
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ex_at(sp, cmdp)
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SCR *sp;
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EXCMD *cmdp;
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{
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CB *cbp;
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CHAR_T name;
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EXCMD *ecp;
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RANGE *rp;
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TEXT *tp;
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size_t len;
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char *p;
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/*
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* !!!
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* Historically, [@*]<carriage-return> and [@*][@*] executed the most
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* recently executed buffer in ex mode.
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*/
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name = FL_ISSET(cmdp->iflags, E_C_BUFFER) ? cmdp->buffer : '@';
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if (name == '@' || name == '*') {
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if (!F_ISSET(sp, SC_AT_SET)) {
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ex_emsg(sp, NULL, EXM_NOPREVBUF);
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return (1);
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}
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name = sp->at_lbuf;
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}
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sp->at_lbuf = name;
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F_SET(sp, SC_AT_SET);
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CBNAME(sp, cbp, name);
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if (cbp == NULL) {
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ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF);
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return (1);
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}
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/*
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* !!!
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* Historically the @ command took a range of lines, and the @ buffer
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* was executed once per line. The historic vi could be trashed by
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* this because it didn't notice if the underlying file changed, or,
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* for that matter, if there were no more lines on which to operate.
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* For example, take a 10 line file, load "%delete" into a buffer,
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* and enter :8,10@<buffer>.
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*
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* The solution is a bit tricky. If the user specifies a range, take
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* the same approach as for global commands, and discard the command
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* if exit or switch to a new file/screen. If the user doesn't specify
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* the range, continue to execute after a file/screen switch, which
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* means @ buffers are still useful in a multi-screen environment.
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*/
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CALLOC_RET(sp, ecp, EXCMD *, 1, sizeof(EXCMD));
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CIRCLEQ_INIT(&ecp->rq);
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CALLOC_RET(sp, rp, RANGE *, 1, sizeof(RANGE));
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rp->start = cmdp->addr1.lno;
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if (F_ISSET(cmdp, E_ADDR_DEF)) {
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rp->stop = rp->start;
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FL_SET(ecp->agv_flags, AGV_AT_NORANGE);
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} else {
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rp->stop = cmdp->addr2.lno;
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FL_SET(ecp->agv_flags, AGV_AT);
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}
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CIRCLEQ_INSERT_HEAD(&ecp->rq, rp, q);
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/*
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* Buffers executed in ex mode or from the colon command line in vi
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* were ex commands. We can't push it on the terminal queue, since
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* it has to be executed immediately, and we may be in the middle of
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* an ex command already. Push the command on the ex command stack.
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* Build two copies of the command. We need two copies because the
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* ex parser may step on the command string when it's parsing it.
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*/
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for (len = 0, tp = cbp->textq.cqh_last;
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tp != (void *)&cbp->textq; tp = tp->q.cqe_prev)
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len += tp->len + 1;
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/* See ex.h for a discussion of SEARCH_TERMINATION. */
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MALLOC_RET(sp, ecp->cp, char *, len * 2 + SEARCH_TERMINATION);
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ecp->o_cp = ecp->cp;
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ecp->o_clen = len;
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ecp->cp[len] = '\0';
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/* Copy the buffer into the command space. */
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for (p = ecp->cp + len + SEARCH_TERMINATION, tp = cbp->textq.cqh_last;
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tp != (void *)&cbp->textq; tp = tp->q.cqe_prev) {
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memmove(p, tp->lb, tp->len);
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p += tp->len;
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*p++ = '\n';
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}
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LIST_INSERT_HEAD(&sp->gp->ecq, ecp, q);
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return (0);
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}
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