[unix-history] / usr.bin / vi / nex / ex_args.c

/*-
 * 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
static char sccsid[] = "@(#)ex_args.c	8.13 (Berkeley) 12/20/93";
#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);
}
Commit	Line	Data
18ae9d6b AS	1	/*-
	2	* Copyright (c) 1991, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	static char sccsid[] = "@(#)ex_args.c 8.13 (Berkeley) 12/20/93";
	36	#endif /* not lint */
	37
	38	#include <sys/types.h>
	39
	40	#include <errno.h>
	41	#include <stdlib.h>
	42	#include <string.h>
	43
	44	#include "vi.h"
	45	#include "excmd.h"
	46
	47	/*
	48	* ex_next -- :next [files]
	49	* Edit the next file, optionally setting the list of files.
	50	*
	51	* !!!
	52	* The :next command behaved differently from the :rewind command in
	53	* historic vi. See nvi/docs/autowrite for details, but the basic
	54	* idea was that it ignored the force flag if the autowrite flag was
	55	* set. This implementation handles them all identically.
	56	*/
	57	int
	58	ex_next(sp, ep, cmdp)
	59	SCR *sp;
	60	EXF *ep;
	61	EXCMDARG *cmdp;
	62	{
	63	ARGS **argv;
	64	FREF *frp;
65	char *name;
66
67	MODIFY_CHECK(sp, ep, F_ISSET(cmdp, E_FORCE));
68
69	if (cmdp->argc) {
70	/* Mark all the current files as ignored. */
71	for (frp = sp->frefq.cqh_first;
72	frp != (FREF *)&sp->frefq; frp = frp->q.cqe_next)
73	F_SET(frp, FR_IGNORE);
74
75	/* Add the new files into the file list. */
76	for (argv = cmdp->argv; argv[0]->len != 0; ++argv)
77	if (file_add(sp, NULL, argv[0]->bp, 0) == NULL)
78	return (1);
79
80	if ((frp = file_first(sp)) == NULL)
81	return (1);
82	} else if ((frp = file_next(sp, sp->a_frp)) == NULL) {
83	msgq(sp, M_ERR, "No more files to edit.");
84	return (1);
85	}
86
87	/*
88	* There's a tricky sequence, where the user edits two files, e.g.
89	* "x" and "y". While in "x", they do ":e y\|:f foo", which changes
90	* the name of that FRP entry. Then, the :n command finds the file
91	* "y" with a name change. If the file name has been changed, get
92	* a new FREF for the original file name, and make it be the one that
93	* is displayed in the argument list, not the one with the name change.
94	*/
95	if (frp->cname != NULL) {
96	F_SET(frp, FR_IGNORE);
97	name = frp->name == NULL ? frp->tname : frp->name;
98	if ((frp = file_add(sp, sp->a_frp, name, 0)) == NULL)
99	return (1);
100	}
101	if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
102	return (1);
103	sp->a_frp = frp;
104	F_SET(sp, S_FSWITCH);
105	return (0);
106	}
107
108	/*
109	* ex_prev -- :prev
110	* Edit the previous file.
111	*/
112	int
113	ex_prev(sp, ep, cmdp)
114	SCR *sp;
115	EXF *ep;
116	EXCMDARG *cmdp;
117	{
118	FREF *frp;
119	char *name;
120
121	MODIFY_CHECK(sp, ep, F_ISSET(cmdp, E_FORCE));
122
123	if ((frp = file_prev(sp, sp->a_frp)) == NULL) {
124	msgq(sp, M_ERR, "No previous files to edit.");
125	return (1);
126	}
127
128	/* See comment in ex_next(). */
129	if (frp->cname != NULL) {
130	F_SET(frp, FR_IGNORE);
131	name = frp->name == NULL ? frp->tname : frp->name;
132	if ((frp = file_add(sp, frp, name, 0)) == NULL)
133	return (1);
134	}
135	if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
136	return (1);
137	sp->a_frp = frp;
138	F_SET(sp, S_FSWITCH);
139	return (0);
140	}
141
142	/*
143	* ex_rew -- :rew
144	* Re-edit the list of files.
145	*/
146	int
147	ex_rew(sp, ep, cmdp)
148	SCR *sp;
149	EXF *ep;
150	EXCMDARG *cmdp;
151	{
152	FREF frp, tfrp;
153
154	/*
155	* !!!
156	* Historic practice -- you can rewind to the current file.
157	*/
158	if ((frp = file_first(sp)) == NULL) {
159	msgq(sp, M_ERR, "No previous files to rewind.");
160	return (1);
161	}
162
163	MODIFY_CHECK(sp, ep, F_ISSET(cmdp, E_FORCE));
164
165	/*
166	* !!!
167	* Historic practice, turn off the edited bit. The :next and :prev
168	* code will discard any name changes, so ignore them here. Start
169	* at the beginning of the file, too.
170	*/
171	for (tfrp = sp->frefq.cqh_first;
172	tfrp != (FREF *)&sp->frefq; tfrp = tfrp->q.cqe_next)
173	F_CLR(tfrp, FR_CHANGEWRITE \| FR_CURSORSET \| FR_EDITED);
174
175	if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE)))
176	return (1);
177	sp->a_frp = frp;
178	F_SET(sp, S_FSWITCH);
179	return (0);
180	}
181
182	/*
183	* ex_args -- :args
184	* Display the list of files.
185	*/
186	int
187	ex_args(sp, ep, cmdp)
188	SCR *sp;
189	EXF *ep;
190	EXCMDARG *cmdp;
191	{
192	FREF *frp;
193	int cnt, col, iscur, len, nlen, sep;
194	char *name;
195
196	/*
197	* !!!
198	* Ignore files that aren't in the "argument" list unless they are the
199	* one we're currently editing. I'm not sure this is right, but the
200	* historic vi behavior of not showing the current file if it was the
201	* result of a ":e" command, or if the file name was changed was wrong.
202	* This is actually pretty tricky, don't modify it without thinking it
203	* through. There have been a lot of problems in here.
204	*
205	* Also, historic practice was to display the original name of the file
206	* even if the user had used a file command to change the file name.
207	* Confusing, at best. We show both names: the original as that's what
208	* the user will get in a next, prev or rewind, and the new one since
209	* that's what the user is actually editing now.
210	*
211	* When we find the "argument" FREF, i.e. the current location in the
212	* user's argument list, if it's not the same as the current FREF, we
213	* display the current FREF as following the argument in the list.
214	* This means that if the user edits three files, "x", "y" and "z", and
215	* then does a :e command in the file "x" to edit "z", "z" will appear
216	* in the list twice.
217	*/
218	col = len = sep = 0;
219	for (cnt = 1, frp = sp->frefq.cqh_first;
220	frp != (FREF *)&sp->frefq; frp = frp->q.cqe_next) {
221	iscur = 0;
222	/*
223	* If the last argument FREF structure, and we're editing
224	* it, set the current bit. Otherwise, we'll display it,
225	* then the file we're editing, and the latter will have
226	* the current bit set.
227	*/
228	if (frp == sp->a_frp) {
229	if (frp == sp->frp && frp->cname == NULL)
230	iscur = 1;
231	} else if (F_ISSET(frp, FR_IGNORE))
232	continue;
233	name = frp->name == NULL ? frp->tname : frp->name;
234	/*
235	* Mistake. The user edited a temporary file (vi /tmp), then
236	* switched to another file (:e file). The argument FREF is
237	* pointing to the temporary file, but it doesn't have a name.
238	* Gracefully recover through the creative use of goto's.
239	*/
240	if (name == NULL)
241	goto testcur;
242	extra: nlen = strlen(name);
243	col += len = nlen + sep + (iscur ? 2 : 0);
244	if (col >= sp->cols - 1) {
245	col = len;
246	sep = 0;
247	(void)ex_printf(EXCOOKIE, "\n");
248	} else if (cnt != 1) {
249	sep = 1;
250	(void)ex_printf(EXCOOKIE, " ");
251	}
252	++cnt;
253
254	if (iscur)
255	(void)ex_printf(EXCOOKIE, "[%s]", name);
256	else {
257	(void)ex_printf(EXCOOKIE, "%s", name);
258	testcur: if (frp == sp->a_frp) {
259	if (frp != sp->frp)
260	name = FILENAME(sp->frp);
261	else
262	name = frp->cname;
263	iscur = 1;
264	goto extra;
265	}
266	}
267	}
268	/* This should never happen; left in because it's been known to. */
269	if (cnt == 1)
270	(void)ex_printf(EXCOOKIE, "No files.\n");
271	else
272	(void)ex_printf(EXCOOKIE, "\n");
273	return (0);
274	}