minix/dist/nvi/vi/v_at.c

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/* $NetBSD: v_at.c,v 1.4 2011/11/23 19:25:28 tnozaki 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: v_at.c,v 10.11 2001/06/25 15:19:30 skimo Exp (Berkeley) Date: 2001/06/25 15:19:30";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "../common/common.h"
#include "vi.h"
/*
* v_at -- @
* Execute a buffer.
*
* PUBLIC: int v_at __P((SCR *, VICMD *));
*/
int
v_at(SCR *sp, VICMD *vp)
{
CB *cbp;
ARG_CHAR_T name;
TEXT *tp;
size_t len;
char nbuf[20];
CHAR_T wbuf[20];
const CHAR_T *wp;
size_t wlen;
/*
* !!!
* Historically, [@*]<carriage-return> and [@*][@*] executed the most
* recently executed buffer in ex mode. In vi mode, only @@ repeated
* the last buffer. We change historic practice and make @* work from
* vi mode as well, it's simpler and more consistent.
*
* My intent is that *[buffer] will, in the future, pass the buffer to
* whatever interpreter is loaded.
*/
name = F_ISSET(vp, VC_BUFFER) ? vp->buffer : '@';
if (name == '@' || name == '*') {
if (!F_ISSET(sp, SC_AT_SET)) {
ex_emsg(sp, NULL, EXM_NOPREVBUF);
return (1);
}
name = sp->at_lbuf;
}
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);
}
/* Save for reuse. */
sp->at_lbuf = name;
/*
* The buffer is executed in vi mode, while in vi mode, so simply
* push it onto the terminal queue and continue.
*
* !!!
* Historic practice is that if the buffer was cut in line mode,
* <newlines> were appended to each line as it was pushed onto
* the stack. If the buffer was cut in character mode, <newlines>
* were appended to all lines but the last one.
*
* XXX
* Historic practice is that execution of an @ buffer could be
* undone by a single 'u' command, i.e. the changes were grouped
* together. We don't get this right; I'm waiting for the new DB
* logging code to be available.
*/
for (tp = cbp->textq.cqh_last;
tp != (void *)&cbp->textq; tp = tp->q.cqe_prev) {
static CHAR_T nl[] = { '\n', 0 };
if (((F_ISSET(cbp, CB_LMODE) ||
tp->q.cqe_next != (void *)&cbp->textq) &&
v_event_push(sp, NULL, nl, 1, 0)) ||
v_event_push(sp, NULL, tp->lb, tp->len, 0))
return (1);
}
/*
* !!!
* If any count was supplied, it applies to the first command in the
* at buffer.
*/
if (F_ISSET(vp, VC_C1SET)) {
len = snprintf(nbuf, sizeof(nbuf), "%lu", vp->count);
CHAR2INT(sp, nbuf, len, wp, wlen);
MEMCPYW(wbuf, wp, wlen);
if (v_event_push(sp, NULL, wp, wlen, 0))
return (1);
}
return (0);
}