2 * Copyright (c) 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid
[] = "$Id: screen.c,v 10.15 1996/09/15 15:57:50 bostic Exp $ (Berkeley) $Date: 1996/09/15 15:57:50 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
33 * Do the default initialization of an SCR structure.
35 * PUBLIC: int screen_init __P((GS *, SCR *, SCR **));
38 screen_init(gp
, orig
, spp
)
46 CALLOC_RET(orig
, sp
, SCR
*, 1, sizeof(SCR
));
49 /* INITIALIZED AT SCREEN CREATE. */
53 sp
->gp
= gp
; /* All ref the GS structure. */
55 sp
->ccnt
= 2; /* Anything > 1 */
59 * sp->defscroll is initialized by the opts_init() code because
60 * we don't have the option information yet.
63 CIRCLEQ_INIT(&sp
->tiq
);
65 /* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */
67 sp
->searchdir
= NOTSET
;
69 /* Alternate file name. */
70 if (orig
->alt_name
!= NULL
&&
71 (sp
->alt_name
= strdup(orig
->alt_name
)) == NULL
)
74 /* Last executed at buffer. */
75 if (F_ISSET(orig
, SC_AT_SET
)) {
77 sp
->at_lbuf
= orig
->at_lbuf
;
80 /* Retain searching/substitution information. */
81 sp
->searchdir
= orig
->searchdir
== NOTSET
? NOTSET
: FORWARD
;
82 if (orig
->re
!= NULL
&& (sp
->re
=
83 v_strdup(sp
, orig
->re
, orig
->re_len
)) == NULL
)
85 sp
->re_len
= orig
->re_len
;
86 if (orig
->subre
!= NULL
&& (sp
->subre
=
87 v_strdup(sp
, orig
->subre
, orig
->subre_len
)) == NULL
)
89 sp
->subre_len
= orig
->subre_len
;
90 if (orig
->repl
!= NULL
&& (sp
->repl
=
91 v_strdup(sp
, orig
->repl
, orig
->repl_len
)) == NULL
)
93 sp
->repl_len
= orig
->repl_len
;
95 len
= orig
->newl_len
* sizeof(size_t);
96 MALLOC(sp
, sp
->newl
, size_t *, len
);
97 if (sp
->newl
== NULL
) {
98 mem
: msgq(orig
, M_SYSERR
, NULL
);
101 sp
->newl_len
= orig
->newl_len
;
102 sp
->newl_cnt
= orig
->newl_cnt
;
103 memcpy(sp
->newl
, orig
->newl
, len
);
106 if (opts_copy(orig
, sp
))
109 F_SET(sp
, F_ISSET(orig
, SC_EX
| SC_VI
));
112 if (ex_screen_copy(orig
, sp
)) /* Ex. */
114 if (v_screen_copy(orig
, sp
)) /* Vi. */
126 * Release a screen, no matter what had (and had not) been
129 * PUBLIC: int screen_end __P((SCR *));
137 /* If multiply referenced, just decrement the count and return. */
138 if (--sp
->refcnt
!= 0)
142 * Remove the screen from the displayed queue.
144 * If a created screen failed during initialization, it may not
145 * be linked into the chain.
147 if (sp
->q
.cqe_next
!= NULL
)
148 CIRCLEQ_REMOVE(&sp
->gp
->dq
, sp
, q
);
150 /* The screen is no longer real. */
151 F_CLR(sp
, SC_SCR_EX
| SC_SCR_VI
);
154 #ifdef HAVE_PERL_INTERP
155 if (perl_screen_end(sp
)) /* End perl. */
158 if (v_screen_end(sp
)) /* End vi. */
160 if (ex_screen_end(sp
)) /* End ex. */
163 /* Free file names. */
165 if (!F_ISSET(sp
, SC_ARGNOFREE
) && sp
->argv
!= NULL
) {
166 for (ap
= sp
->argv
; *ap
!= NULL
; ++ap
)
172 /* Free any text input. */
173 if (sp
->tiq
.cqh_first
!= NULL
)
174 text_lfree(&sp
->tiq
);
176 /* Free alternate file name. */
177 if (sp
->alt_name
!= NULL
)
180 /* Free up search information. */
183 if (F_ISSET(sp
, SC_RE_SEARCH
))
185 if (sp
->subre
!= NULL
)
187 if (F_ISSET(sp
, SC_RE_SUBST
))
188 regfree(&sp
->subre_c
);
189 if (sp
->repl
!= NULL
)
191 if (sp
->newl
!= NULL
)
194 /* Free all the options */
197 /* Free the screen itself. */
205 * Return the next screen in the queue.
207 * PUBLIC: SCR *screen_next __P((SCR *));
216 /* Try the display queue, without returning the current screen. */
218 for (next
= gp
->dq
.cqh_first
;
219 next
!= (void *)&gp
->dq
; next
= next
->q
.cqe_next
)
222 if (next
!= (void *)&gp
->dq
)
225 /* Try the hidden queue; if found, move screen to the display queue. */
226 if (gp
->hq
.cqh_first
!= (void *)&gp
->hq
) {
227 next
= gp
->hq
.cqh_first
;
228 CIRCLEQ_REMOVE(&gp
->hq
, next
, q
);
229 CIRCLEQ_INSERT_HEAD(&gp
->dq
, next
, q
);