NetBSD/usr.bin/vi/ex/ex_init.c

203 lines
4.5 KiB
C

/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)ex_init.c 8.18 (Berkeley) 8/17/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include "compat.h"
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "excmd.h"
#include "tag.h"
/*
* ex_screen_copy --
* Copy ex screen.
*/
int
ex_screen_copy(orig, sp)
SCR *orig, *sp;
{
EX_PRIVATE *oexp, *nexp;
/* Create the private ex structure. */
CALLOC_RET(orig, nexp, EX_PRIVATE *, 1, sizeof(EX_PRIVATE));
sp->ex_private = nexp;
/* Initialize queues. */
TAILQ_INIT(&nexp->tagq);
TAILQ_INIT(&nexp->tagfq);
TAILQ_INIT(&nexp->cdq);
CIRCLEQ_INIT(&nexp->rangeq);
if (orig == NULL) {
nexp->at_lbuf_set = 0;
} else {
oexp = EXP(orig);
nexp->at_lbuf = oexp->at_lbuf;
nexp->at_lbuf_set = oexp->at_lbuf_set;
if (oexp->lastbcomm != NULL &&
(nexp->lastbcomm = strdup(oexp->lastbcomm)) == NULL) {
msgq(sp, M_SYSERR, NULL);
return(1);
}
if (ex_tagcopy(orig, sp))
return (1);
}
return (0);
}
/*
* ex_screen_end --
* End a vi screen.
*/
int
ex_screen_end(sp)
SCR *sp;
{
EX_PRIVATE *exp;
int rval;
rval = 0;
exp = EXP(sp);
if (argv_free(sp))
rval = 1;
if (exp->ibp != NULL)
FREE(exp->ibp, exp->ibp_len);
if (exp->lastbcomm != NULL)
FREE(exp->lastbcomm, strlen(exp->lastbcomm) + 1);
if (ex_tagfree(sp))
rval = 1;
if (ex_cdfree(sp))
rval = 1;
/* Free private memory. */
FREE(exp, sizeof(EX_PRIVATE));
sp->ex_private = NULL;
return (rval);
}
/*
* ex_init --
* Initialize ex.
*/
int
ex_init(sp, ep)
SCR *sp;
EXF *ep;
{
size_t len;
/*
* The default address is the last line of the file. If the address
* set bit is on for this file, load the address, ensuring that it
* exists.
*/
if (F_ISSET(sp->frp, FR_CURSORSET)) {
sp->lno = sp->frp->lno;
sp->cno = sp->frp->cno;
if (file_gline(sp, ep, sp->lno, &len) == NULL) {
if (file_lline(sp, ep, &sp->lno))
return (1);
if (sp->lno == 0)
sp->lno = 1;
sp->cno = 0;
} else if (sp->cno >= len)
sp->cno = 0;
} else {
if (file_lline(sp, ep, &sp->lno))
return (1);
if (sp->lno == 0)
sp->lno = 1;
sp->cno = 0;
}
/* Display the status line. */
return (msg_status(sp, ep, sp->lno, 0));
}
/*
* ex_end --
* End ex session.
*/
int
ex_end(sp)
SCR *sp;
{
return (0);
}
/*
* ex_optchange --
* Handle change of options for vi.
*/
int
ex_optchange(sp, opt)
SCR *sp;
int opt;
{
switch (opt) {
case O_CDPATH:
return (ex_cdalloc(sp, O_STR(sp, O_CDPATH)));
case O_TAGS:
return (ex_tagalloc(sp, O_STR(sp, O_TAGS)));
}
return (0);
}