1/* $OpenBSD: lib_cur_term.c,v 1.7 2023/10/17 09:52:09 nicm Exp $ */
2
3/****************************************************************************
4,* Copyright 2020-2021,2022 Thomas E. Dickey                                *
5 * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
6 *                                                                          *
7 * Permission is hereby granted, free of charge, to any person obtaining a  *
8 * copy of this software and associated documentation files (the            *
9 * "Software"), to deal in the Software without restriction, including      *
10 * without limitation the rights to use, copy, modify, merge, publish,      *
11 * distribute, distribute with modifications, sublicense, and/or sell       *
12 * copies of the Software, and to permit persons to whom the Software is    *
13 * furnished to do so, subject to the following conditions:                 *
14 *                                                                          *
15 * The above copyright notice and this permission notice shall be included  *
16 * in all copies or substantial portions of the Software.                   *
17 *                                                                          *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
25 *                                                                          *
26 * Except as contained in this notice, the name(s) of the above copyright   *
27 * holders shall not be used in advertising or otherwise to promote the     *
28 * sale, use or other dealings in this Software without prior written       *
29 * authorization.                                                           *
30 ****************************************************************************/
31
32/****************************************************************************
33 *  Author: Thomas E. Dickey <dickey@clark.net> 1997                        *
34 ****************************************************************************/
35/*
36 * Module that "owns" the 'cur_term' variable:
37 *
38 *	TERMINAL *set_curterm(TERMINAL *)
39 *	int del_curterm(TERMINAL *)
40 */
41
42#include <curses.priv.h>
43#include <termcap.h>		/* ospeed */
44#include <tic.h>		/* VALID_STRING */
45
46MODULE_ID("$Id: lib_cur_term.c,v 1.7 2023/10/17 09:52:09 nicm Exp $")
47
48#undef CUR
49#define CUR TerminalType(termp).
50
51#if USE_REENTRANT
52
53NCURSES_EXPORT(TERMINAL *)
54NCURSES_SP_NAME(_nc_get_cur_term) (NCURSES_SP_DCL0)
55{
56    return ((0 != TerminalOf(SP_PARM)) ? TerminalOf(SP_PARM) : CurTerm);
57}
58
59#if NCURSES_SP_FUNCS
60
61NCURSES_EXPORT(TERMINAL *)
62_nc_get_cur_term(void)
63{
64    return NCURSES_SP_NAME(_nc_get_cur_term) (CURRENT_SCREEN);
65}
66#endif
67
68NCURSES_EXPORT(TERMINAL *)
69NCURSES_PUBLIC_VAR(cur_term) (void)
70{
71#if NCURSES_SP_FUNCS
72    return NCURSES_SP_NAME(_nc_get_cur_term) (CURRENT_SCREEN);
73#else
74    return NCURSES_SP_NAME(_nc_get_cur_term) (NCURSES_SP_ARG);
75#endif
76}
77
78#else
79NCURSES_EXPORT_VAR(TERMINAL *) cur_term = 0;
80#endif
81
82NCURSES_EXPORT(TERMINAL *)
83NCURSES_SP_NAME(set_curterm) (NCURSES_SP_DCLx TERMINAL *termp)
84{
85    TERMINAL *oldterm;
86
87    T((T_CALLED("set_curterm(%p)"), (void *) termp));
88
89    _nc_lock_global(curses);
90    oldterm = cur_term;
91    if (SP_PARM)
92	SP_PARM->_term = termp;
93#if USE_REENTRANT
94    CurTerm = termp;
95#else
96    cur_term = termp;
97#endif
98    if (termp != 0) {
99#ifdef USE_TERM_DRIVER
100	TERMINAL_CONTROL_BLOCK *TCB = (TERMINAL_CONTROL_BLOCK *) termp;
101	ospeed = (NCURSES_OSPEED) _nc_ospeed(termp->_baudrate);
102	if (TCB->drv &&
103	    TCB->drv->isTerminfo &&
104	    TerminalType(termp).Strings) {
105	    PC = (char) (VALID_STRING(pad_char) ? pad_char[0] : 0);
106	}
107	TCB->csp = SP_PARM;
108#else
109	ospeed = (NCURSES_OSPEED) _nc_ospeed(termp->_baudrate);
110	if (TerminalType(termp).Strings) {
111	    PC = (char) (VALID_STRING(pad_char) ? pad_char[0] : 0);
112	}
113#endif
114#if !USE_REENTRANT
115	save_ttytype(termp);
116#endif
117    }
118    _nc_unlock_global(curses);
119
120    T((T_RETURN("%p"), (void *) oldterm));
121    return (oldterm);
122}
123
124#if NCURSES_SP_FUNCS
125NCURSES_EXPORT(TERMINAL *)
126set_curterm(TERMINAL *termp)
127{
128    return NCURSES_SP_NAME(set_curterm) (CURRENT_SCREEN, termp);
129}
130#endif
131
132NCURSES_EXPORT(int)
133NCURSES_SP_NAME(del_curterm) (NCURSES_SP_DCLx TERMINAL *termp)
134{
135    int rc = ERR;
136
137    T((T_CALLED("del_curterm(%p, %p)"), (void *) SP_PARM, (void *) termp));
138
139    if (termp != 0) {
140#ifdef USE_TERM_DRIVER
141	TERMINAL_CONTROL_BLOCK *TCB = (TERMINAL_CONTROL_BLOCK *) termp;
142#endif
143	TERMINAL *cur = (
144#if USE_REENTRANT
145			    NCURSES_SP_NAME(_nc_get_cur_term) (NCURSES_SP_ARG)
146#else
147			    cur_term
148#endif
149	);
150
151#if NCURSES_EXT_NUMBERS
152#if NCURSES_EXT_COLORS
153	_nc_free_termtype1(&termp->type);
154#else
155	_nc_free_termtype2(&termp->type);
156#endif
157#endif
158	_nc_free_termtype2(&TerminalType(termp));
159	if (termp == cur)
160	    NCURSES_SP_NAME(set_curterm) (NCURSES_SP_ARGx 0);
161
162	FreeIfNeeded(termp->_termname);
163#if USE_HOME_TERMINFO
164	if (_nc_globals.home_terminfo != 0) {
165	    FreeAndNull(_nc_globals.home_terminfo);
166	}
167#endif
168#ifdef USE_TERM_DRIVER
169	if (TCB->drv)
170	    TCB->drv->td_release(TCB);
171#endif
172#if NO_LEAKS
173	/* discard memory used in tgetent's cache for this terminal */
174	_nc_tgetent_leak(termp);
175#endif
176	if (--_nc_globals.terminal_count == 0) {
177	    _nc_free_tparm(termp);
178	}
179
180	free(termp->tparm_state.fmt_buff);
181	free(termp->tparm_state.out_buff);
182	free(termp);
183
184	rc = OK;
185    }
186
187    returnCode(rc);
188}
189
190#if NCURSES_SP_FUNCS
191NCURSES_EXPORT(int)
192del_curterm(TERMINAL *termp)
193{
194    int rc;
195
196    _nc_lock_global(curses);
197    rc = NCURSES_SP_NAME(del_curterm) (CURRENT_SCREEN, termp);
198    _nc_unlock_global(curses);
199
200    return (rc);
201}
202#endif
203