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/* $OpenBSD: ex_at.c,v 1.14 2016/05/27 09:18:12 martijn Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/queue.h>
#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../common/common.h"
/*
* ex_at -- :@[@ | buffer]
* :*[* | buffer]
*
* Execute the contents of the buffer.
*
* PUBLIC: int ex_at(SCR *, EXCMD *);
*/
int
ex_at(SCR *sp, EXCMD *cmdp)
{
CB *cbp;
CHAR_T name;
EXCMD *ecp;
RANGE *rp;
TEXT *tp;
size_t len;
char *p;
/*
* !!!
* Historically, [@*]<carriage-return> and [@*][@*] executed the most
* recently executed buffer in ex mode.
*/
name = FL_ISSET(cmdp->iflags, E_C_BUFFER) ? cmdp->buffer : '@';
if (name == '@' || name == '*') {
if (!F_ISSET(sp, SC_AT_SET)) {
ex_emsg(sp, NULL, EXM_NOPREVBUF);
return (1);
}
name = sp->at_lbuf;
}
sp->at_lbuf = name;
F_SET(sp, SC_AT_SET);
CBNAME(sp, cbp, name);
if (cbp == NULL) {
ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF);
return (1);
}
/*
* !!!
* Historically the @ command took a range of lines, and the @ buffer
* was executed once per line. The historic vi could be trashed by
* this because it didn't notice if the underlying file changed, or,
* for that matter, if there were no more lines on which to operate.
* For example, take a 10 line file, load "%delete" into a buffer,
* and enter :8,10@<buffer>.
*
* The solution is a bit tricky. If the user specifies a range, take
* the same approach as for global commands, and discard the command
* if exit or switch to a new file/screen. If the user doesn't specify
* the range, continue to execute after a file/screen switch, which
* means @ buffers are still useful in a multi-screen environment.
*/
CALLOC_RET(sp, ecp, 1, sizeof(EXCMD));
TAILQ_INIT(&ecp->rq);
CALLOC_RET(sp, rp, 1, sizeof(RANGE));
rp->start = cmdp->addr1.lno;
if (F_ISSET(cmdp, E_ADDR_DEF)) {
rp->stop = rp->start;
FL_SET(ecp->agv_flags, AGV_AT_NORANGE);
} else {
rp->stop = cmdp->addr2.lno;
FL_SET(ecp->agv_flags, AGV_AT);
}
TAILQ_INSERT_HEAD(&ecp->rq, rp, q);
/*
* Buffers executed in ex mode or from the colon command line in vi
* were ex commands. We can't push it on the terminal queue, since
* it has to be executed immediately, and we may be in the middle of
* an ex command already. Push the command on the ex command stack.
* Build two copies of the command. We need two copies because the
* ex parser may step on the command string when it's parsing it.
*/
len = 0;
TAILQ_FOREACH_REVERSE(tp, &cbp->textq, _texth, q) {
len += tp->len + 1;
}
MALLOC_RET(sp, ecp->cp, len * 2);
ecp->o_cp = ecp->cp;
ecp->o_clen = len;
ecp->cp[len] = '\0';
/* Copy the buffer into the command space. */
p = ecp->cp + len;
TAILQ_FOREACH_REVERSE(tp, &cbp->textq, _texth, q) {
memcpy(p, tp->lb, tp->len);
p += tp->len;
*p++ = '\n';
}
LIST_INSERT_HEAD(&sp->gp->ecq, ecp, q);
return (0);
}
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