1 /****************************************************************************
2 * Copyright 2019-2022,2023 Thomas E. Dickey *
3 * Copyright 2006-2012,2017 Free Software Foundation, Inc. *
4 * *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
27 * authorization. *
28 ****************************************************************************/
29
30 /****************************************************************************
31 * Author: Thomas E. Dickey *
32 * and: Juergen Pfeifer *
33 ****************************************************************************/
34
35 #include <curses.priv.h>
36
37 #include <ctype.h>
38
39 #include <tic.h>
40
41 MODULE_ID("$Id: entries.c,v 1.35 2023/05/27 20:13:10 tom Exp $")
42
43 /****************************************************************************
44 *
45 * Entry queue handling
46 *
47 ****************************************************************************/
48 /*
49 * The entry list is a doubly linked list with NULLs terminating the lists:
50 *
51 * --------- --------- ---------
52 * | | | | | | offset
53 * |-------| |-------| |-------|
54 * | ----+-->| ----+-->| NULL | next
55 * |-------| |-------| |-------|
56 * | NULL |<--+---- |<--+---- | last
57 * --------- --------- ---------
58 * ^ ^
59 * | |
60 * | |
61 * _nc_head _nc_tail
62 */
63
64 NCURSES_EXPORT_VAR(ENTRY *) _nc_head = 0;
65 NCURSES_EXPORT_VAR(ENTRY *) _nc_tail = 0;
66
67 static ENTRY *
_nc_delink_entry(ENTRY * headp,const TERMTYPE2 * const tterm)68 _nc_delink_entry(ENTRY * headp, const TERMTYPE2 *const tterm)
69 /* delink the allocated storage for the given list entry */
70 {
71 ENTRY *ep, *last;
72
73 for (last = 0, ep = headp; ep != 0; last = ep, ep = ep->next) {
74 if (&(ep->tterm) == tterm) {
75 if (last != 0) {
76 last->next = ep->next;
77 }
78 if (ep->next != 0) {
79 ep->next->last = last;
80 }
81 if (ep == _nc_head) {
82 _nc_head = ep->next;
83 }
84 if (ep == _nc_tail) {
85 _nc_tail = last;
86 }
87 break;
88 }
89 }
90 return ep;
91 }
92
93 NCURSES_EXPORT(void)
_nc_free_entry(ENTRY * headp,TERMTYPE2 * tterm)94 _nc_free_entry(ENTRY * headp, TERMTYPE2 *tterm)
95 /* free the allocated storage consumed by the given list entry */
96 {
97 ENTRY *ep;
98
99 if ((ep = _nc_delink_entry(headp, tterm)) != 0) {
100 free(ep);
101 }
102 }
103
104 NCURSES_EXPORT(void)
_nc_free_entries(ENTRY * headp)105 _nc_free_entries(ENTRY * headp)
106 /* free the allocated storage consumed by list entries */
107 {
108 (void) headp; /* unused - _nc_head is altered here! */
109
110 while (_nc_head != 0) {
111 _nc_free_termtype2(&(_nc_head->tterm));
112 }
113 }
114
115 NCURSES_EXPORT(void)
_nc_leaks_tinfo(void)116 _nc_leaks_tinfo(void)
117 {
118 #if NO_LEAKS
119 char *s;
120 #endif
121
122 T((T_CALLED("_nc_leaks_tinfo()")));
123 #if NO_LEAKS
124 _nc_globals.leak_checking = TRUE;
125 _nc_free_tparm(cur_term);
126 _nc_tgetent_leaks();
127
128 #ifdef USE_PTHREADS
129 /*
130 * Discard any prescreen data which is not used for the current screen.
131 */
132 _nc_lock_global(screen);
133 {
134 PRESCREEN_LIST *p;
135 pthread_t id = GetThreadID();
136 for (p = _nc_prescreen.allocated; p != 0; p = p->next) {
137 if (p->id == id && p->sp != CURRENT_SCREEN) {
138 FreeAndNull(p->sp);
139 }
140 }
141 }
142 _nc_unlock_global(screen);
143 #endif
144 if (TerminalOf(CURRENT_SCREEN) != 0) {
145 del_curterm(TerminalOf(CURRENT_SCREEN));
146 }
147 _nc_forget_prescr();
148
149 _nc_comp_captab_leaks();
150 _nc_comp_userdefs_leaks();
151 _nc_free_entries(_nc_head);
152 _nc_get_type(0);
153 _nc_first_name(0);
154 _nc_db_iterator_leaks();
155 _nc_keyname_leaks();
156 #if BROKEN_LINKER || USE_REENTRANT
157 _nc_names_leaks();
158 _nc_codes_leaks();
159 FreeIfNeeded(_nc_prescreen.real_acs_map);
160 #endif
161 _nc_comp_error_leaks();
162
163 if ((s = _nc_home_terminfo()) != 0)
164 free(s);
165
166 #ifdef TRACE
167 T((T_RETURN("")));
168 curses_trace(0);
169 _nc_trace_buf(-1, (size_t) 0);
170 #endif
171
172 #endif /* NO_LEAKS */
173 returnVoid;
174 }
175
176 #if NO_LEAKS
177 NCURSES_EXPORT(void)
_nc_free_tinfo(int code)178 _nc_free_tinfo(int code)
179 {
180 T((T_CALLED("_nc_free_tinfo(%d)"), code));
181 _nc_leaks_tinfo();
182 exit(code);
183 }
184 #endif
185
186 NCURSES_EXPORT(void)
exit_terminfo(int code)187 exit_terminfo(int code)
188 {
189 T((T_CALLED("exit_terminfo(%d)"), code));
190 #if NO_LEAKS
191 _nc_leaks_tinfo();
192 #endif
193 exit(code);
194 }
195