1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 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[] = "@(#)screen.c 10.15 (Berkeley) 9/15/96";
#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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "../vi/vi.h"
/*
* screen_init --
* Do the default initialization of an SCR structure.
*
* PUBLIC: int screen_init __P((GS *, SCR *, SCR **));
*/
int
screen_init(gp, orig, spp)
GS *gp;
SCR *orig, **spp;
{
SCR *sp;
size_t len;
*spp = NULL;
CALLOC_RET(orig, sp, SCR *, 1, sizeof(SCR));
*spp = sp;
/* INITIALIZED AT SCREEN CREATE. */
sp->id = ++gp->id;
sp->refcnt = 1;
sp->gp = gp; /* All ref the GS structure. */
sp->ccnt = 2; /* Anything > 1 */
/*
* XXX
* sp->defscroll is initialized by the opts_init() code because
* we don't have the option information yet.
*/
CIRCLEQ_INIT(&sp->tiq);
/* PARTIALLY OR COMPLETELY COPIED FROM PREVIOUS SCREEN. */
if (orig == NULL) {
sp->searchdir = NOTSET;
} else {
/* Alternate file name. */
if (orig->alt_name != NULL &&
(sp->alt_name = strdup(orig->alt_name)) == NULL)
goto mem;
/* Last executed at buffer. */
if (F_ISSET(orig, SC_AT_SET)) {
F_SET(sp, SC_AT_SET);
sp->at_lbuf = orig->at_lbuf;
}
/* Retain searching/substitution information. */
sp->searchdir = orig->searchdir == NOTSET ? NOTSET : FORWARD;
if (orig->re != NULL && (sp->re =
v_strdup(sp, orig->re, orig->re_len)) == NULL)
goto mem;
sp->re_len = orig->re_len;
if (orig->subre != NULL && (sp->subre =
v_strdup(sp, orig->subre, orig->subre_len)) == NULL)
goto mem;
sp->subre_len = orig->subre_len;
if (orig->repl != NULL && (sp->repl =
v_strdup(sp, orig->repl, orig->repl_len)) == NULL)
goto mem;
sp->repl_len = orig->repl_len;
if (orig->newl_len) {
len = orig->newl_len * sizeof(size_t);
MALLOC(sp, sp->newl, size_t *, len);
if (sp->newl == NULL) {
mem: msgq(orig, M_SYSERR, NULL);
goto err;
}
sp->newl_len = orig->newl_len;
sp->newl_cnt = orig->newl_cnt;
memcpy(sp->newl, orig->newl, len);
}
if (opts_copy(orig, sp))
goto err;
F_SET(sp, F_ISSET(orig, SC_EX | SC_VI));
}
if (ex_screen_copy(orig, sp)) /* Ex. */
goto err;
if (v_screen_copy(orig, sp)) /* Vi. */
goto err;
*spp = sp;
return (0);
err: screen_end(sp);
return (1);
}
/*
* screen_end --
* Release a screen, no matter what had (and had not) been
* initialized.
*
* PUBLIC: int screen_end __P((SCR *));
*/
int
screen_end(sp)
SCR *sp;
{
int rval;
/* If multiply referenced, just decrement the count and return. */
if (--sp->refcnt != 0)
return (0);
/*
* Remove the screen from the displayed queue.
*
* If a created screen failed during initialization, it may not
* be linked into the chain.
*/
if (sp->q.cqe_next != NULL)
CIRCLEQ_REMOVE(&sp->gp->dq, sp, q);
/* The screen is no longer real. */
F_CLR(sp, SC_SCR_EX | SC_SCR_VI);
rval = 0;
#ifdef HAVE_PERL_INTERP
if (perl_screen_end(sp)) /* End perl. */
rval = 1;
#endif
if (v_screen_end(sp)) /* End vi. */
rval = 1;
if (ex_screen_end(sp)) /* End ex. */
rval = 1;
/* Free file names. */
{ char **ap;
if (!F_ISSET(sp, SC_ARGNOFREE) && sp->argv != NULL) {
for (ap = sp->argv; *ap != NULL; ++ap)
free(*ap);
free(sp->argv);
}
}
/* Free any text input. */
if (sp->tiq.cqh_first != NULL)
text_lfree(&sp->tiq);
/* Free alternate file name. */
if (sp->alt_name != NULL)
free(sp->alt_name);
/* Free up search information. */
if (sp->re != NULL)
free(sp->re);
if (F_ISSET(sp, SC_RE_SEARCH))
regfree(&sp->re_c);
if (sp->subre != NULL)
free(sp->subre);
if (F_ISSET(sp, SC_RE_SUBST))
regfree(&sp->subre_c);
if (sp->repl != NULL)
free(sp->repl);
if (sp->newl != NULL)
free(sp->newl);
/* Free all the options */
opts_free(sp);
/* Free the screen itself. */
free(sp);
return (rval);
}
/*
* screen_next --
* Return the next screen in the queue.
*
* PUBLIC: SCR *screen_next __P((SCR *));
*/
SCR *
screen_next(sp)
SCR *sp;
{
GS *gp;
SCR *next;
/* Try the display queue, without returning the current screen. */
gp = sp->gp;
for (next = gp->dq.cqh_first;
next != (void *)&gp->dq; next = next->q.cqe_next)
if (next != sp)
break;
if (next != (void *)&gp->dq)
return (next);
/* Try the hidden queue; if found, move screen to the display queue. */
if (gp->hq.cqh_first != (void *)&gp->hq) {
next = gp->hq.cqh_first;
CIRCLEQ_REMOVE(&gp->hq, next, q);
CIRCLEQ_INSERT_HEAD(&gp->dq, next, q);
return (next);
}
return (NULL);
}
|
