minix/external/bsd/nvi/dist/ex/ex_at.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

128 lines
3.5 KiB
C

/* $NetBSD: ex_at.c,v 1.4 2013/11/27 21:13:16 christos 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"
#ifndef lint
static const char sccsid[] = "Id: ex_at.c,v 10.16 2001/06/25 15:19:14 skimo Exp (Berkeley) Date: 2001/06/25 15:19:14 ";
#endif /* not lint */
#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 __P((SCR *, EXCMD *));
*/
int
ex_at(SCR *sp, EXCMD *cmdp)
{
CB *cbp;
ARG_CHAR_T name;
EXCMD *ecp;
RANGE *rp;
TEXT *tp;
size_t len;
CHAR_T *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, (char *)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, EXCMD *, 1, sizeof(EXCMD));
TAILQ_INIT(&ecp->rq);
CALLOC_RET(sp, rp, RANGE *, 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.
*/
for (len = 0, tp = TAILQ_LAST(&cbp->textq, _texth);
tp != NULL; tp = TAILQ_PREV(tp, _texth, q))
len += tp->len + 1;
MALLOC_GOTO(sp, ecp->cp, CHAR_T *, len * 2 * sizeof(CHAR_T));
ecp->o_cp = ecp->cp;
ecp->o_clen = len;
ecp->cp[len] = '\0';
/* Copy the buffer into the command space. */
for (p = ecp->cp + len, tp = TAILQ_LAST(&cbp->textq, _texth);
tp != NULL; tp = TAILQ_PREV(tp, _texth, q)) {
MEMCPYW(p, tp->lb, tp->len);
p += tp->len;
*p++ = '\n';
}
LIST_INSERT_HEAD(&sp->wp->ecq, ecp, q);
return (0);
alloc_err:
free(ecp);
return 1;
}