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

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/*-
* Copyright (c) 1991, 1993
* 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
/* from: static char sccsid[] = "@(#)ex_args.c 8.13 (Berkeley) 12/20/93"; */
static char *rcsid = "$Id: ex_args.c,v 1.2 1994/01/24 06:40:06 cgd Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "vi.h"
#include "excmd.h"
/*
* ex_next -- :next [files]
* Edit the next file, optionally setting the list of files.
*
* !!!
* The :next command behaved differently from the :rewind command in
* historic vi. See nvi/docs/autowrite for details, but the basic
* idea was that it ignored the force flag if the autowrite flag was
* set. This implementation handles them all identically.
*/
int
ex_next(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
ARGS **argv;
FREF *frp;
char *name;
MODIFY_CHECK(sp, ep, F_ISSET(cmdp, E_FORCE));
if (cmdp->argc) {
/* Mark all the current files as ignored. */
for (frp = sp->frefq.cqh_first;
frp != (FREF *)&sp->frefq; frp = frp->q.cqe_next)
F_SET(frp, FR_IGNORE);
/* Add the new files into the file list. */
for (argv = cmdp->argv; argv[0]->len != 0; ++argv)
if (file_add(sp, NULL, argv[0]->bp, 0) == NULL)
return (1);
if ((frp = file_first(sp)) == NULL)
return (1);
} else if ((frp = file_next(sp, sp->a_frp)) == NULL) {
msgq(sp, M_ERR, "No more files to edit.");
return (1);
}
/*
* There's a tricky sequence, where the user edits two files, e.g.
* "x" and "y". While in "x", they do ":e y|:f foo", which changes
* the name of that FRP entry. Then, the :n command finds the file
* "y" with a name change. If the file name has been changed, get
* a new FREF for the original file name, and make it be the one that
* is displayed in the argument list, not the one with the name change.
*/
if (frp->cname != NULL) {
F_SET(frp, FR_IGNORE);
name = frp->name == NULL ? frp->tname : frp->name;
if ((frp = file_add(sp, sp->a_frp, name, 0)) == NULL)
return (1);
}
if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
return (1);
sp->a_frp = frp;
F_SET(sp, S_FSWITCH);
return (0);
}
/*
* ex_prev -- :prev
* Edit the previous file.
*/
int
ex_prev(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
FREF *frp;
char *name;
MODIFY_CHECK(sp, ep, F_ISSET(cmdp, E_FORCE));
if ((frp = file_prev(sp, sp->a_frp)) == NULL) {
msgq(sp, M_ERR, "No previous files to edit.");
return (1);
}
/* See comment in ex_next(). */
if (frp->cname != NULL) {
F_SET(frp, FR_IGNORE);
name = frp->name == NULL ? frp->tname : frp->name;
if ((frp = file_add(sp, frp, name, 0)) == NULL)
return (1);
}
if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
return (1);
sp->a_frp = frp;
F_SET(sp, S_FSWITCH);
return (0);
}
/*
* ex_rew -- :rew
* Re-edit the list of files.
*/
int
ex_rew(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
FREF *frp, *tfrp;
/*
* !!!
* Historic practice -- you can rewind to the current file.
*/
if ((frp = file_first(sp)) == NULL) {
msgq(sp, M_ERR, "No previous files to rewind.");
return (1);
}
MODIFY_CHECK(sp, ep, F_ISSET(cmdp, E_FORCE));
/*
* !!!
* Historic practice, turn off the edited bit. The :next and :prev
* code will discard any name changes, so ignore them here. Start
* at the beginning of the file, too.
*/
for (tfrp = sp->frefq.cqh_first;
tfrp != (FREF *)&sp->frefq; tfrp = tfrp->q.cqe_next)
F_CLR(tfrp, FR_CHANGEWRITE | FR_CURSORSET | FR_EDITED);
if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
return (1);
sp->a_frp = frp;
F_SET(sp, S_FSWITCH);
return (0);
}
/*
* ex_args -- :args
* Display the list of files.
*/
int
ex_args(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
FREF *frp;
int cnt, col, iscur, len, nlen, sep;
char *name;
/*
* !!!
* Ignore files that aren't in the "argument" list unless they are the
* one we're currently editing. I'm not sure this is right, but the
* historic vi behavior of not showing the current file if it was the
* result of a ":e" command, or if the file name was changed was wrong.
* This is actually pretty tricky, don't modify it without thinking it
* through. There have been a lot of problems in here.
*
* Also, historic practice was to display the original name of the file
* even if the user had used a file command to change the file name.
* Confusing, at best. We show both names: the original as that's what
* the user will get in a next, prev or rewind, and the new one since
* that's what the user is actually editing now.
*
* When we find the "argument" FREF, i.e. the current location in the
* user's argument list, if it's not the same as the current FREF, we
* display the current FREF as following the argument in the list.
* This means that if the user edits three files, "x", "y" and "z", and
* then does a :e command in the file "x" to edit "z", "z" will appear
* in the list twice.
*/
col = len = sep = 0;
for (cnt = 1, frp = sp->frefq.cqh_first;
frp != (FREF *)&sp->frefq; frp = frp->q.cqe_next) {
iscur = 0;
/*
* If the last argument FREF structure, and we're editing
* it, set the current bit. Otherwise, we'll display it,
* then the file we're editing, and the latter will have
* the current bit set.
*/
if (frp == sp->a_frp) {
if (frp == sp->frp && frp->cname == NULL)
iscur = 1;
} else if (F_ISSET(frp, FR_IGNORE))
continue;
name = frp->name == NULL ? frp->tname : frp->name;
/*
* Mistake. The user edited a temporary file (vi /tmp), then
* switched to another file (:e file). The argument FREF is
* pointing to the temporary file, but it doesn't have a name.
* Gracefully recover through the creative use of goto's.
*/
if (name == NULL)
goto testcur;
extra: nlen = strlen(name);
col += len = nlen + sep + (iscur ? 2 : 0);
if (col >= sp->cols - 1) {
col = len;
sep = 0;
(void)ex_printf(EXCOOKIE, "\n");
} else if (cnt != 1) {
sep = 1;
(void)ex_printf(EXCOOKIE, " ");
}
++cnt;
if (iscur)
(void)ex_printf(EXCOOKIE, "[%s]", name);
else {
(void)ex_printf(EXCOOKIE, "%s", name);
testcur: if (frp == sp->a_frp) {
if (frp != sp->frp)
name = FILENAME(sp->frp);
else
name = frp->cname;
iscur = 1;
goto extra;
}
}
}
/* This should never happen; left in because it's been known to. */
if (cnt == 1)
(void)ex_printf(EXCOOKIE, "No files.\n");
else
(void)ex_printf(EXCOOKIE, "\n");
return (0);
}
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