1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 1998-2016,2017 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 <dickey@clark.net> 1997                        *
32 ****************************************************************************/
33/*
34 * Module that "owns" the 'cur_term' variable:
35 *
36 *	TERMINAL *set_curterm(TERMINAL *)
37 *	int del_curterm(TERMINAL *)
38 */
39
40#include <curses.priv.h>
41#include <termcap.h>		/* ospeed */
42
43MODULE_ID("$Id: lib_cur_term.c,v 1.42 2020/02/02 23:34:34 tom Exp $")
44
45#undef CUR
46#define CUR TerminalType(termp).
47
48#if USE_REENTRANT
49
50NCURSES_EXPORT(TERMINAL *)
51NCURSES_SP_NAME(_nc_get_cur_term) (NCURSES_SP_DCL0)
52{
53    return ((0 != TerminalOf(SP_PARM)) ? TerminalOf(SP_PARM) : CurTerm);
54}
55
56#if NCURSES_SP_FUNCS
57
58NCURSES_EXPORT(TERMINAL *)
59_nc_get_cur_term(void)
60{
61    return NCURSES_SP_NAME(_nc_get_cur_term) (CURRENT_SCREEN);
62}
63#endif
64
65NCURSES_EXPORT(TERMINAL *)
66NCURSES_PUBLIC_VAR(cur_term) (void)
67{
68#if NCURSES_SP_FUNCS
69    return NCURSES_SP_NAME(_nc_get_cur_term) (CURRENT_SCREEN);
70#else
71    return NCURSES_SP_NAME(_nc_get_cur_term) (NCURSES_SP_ARG);
72#endif
73}
74
75#else
76NCURSES_EXPORT_VAR(TERMINAL *) cur_term = 0;
77#endif
78
79NCURSES_EXPORT(TERMINAL *)
80NCURSES_SP_NAME(set_curterm) (NCURSES_SP_DCLx TERMINAL *termp)
81{
82    TERMINAL *oldterm;
83
84    T((T_CALLED("set_curterm(%p)"), (void *) termp));
85
86    _nc_lock_global(curses);
87    oldterm = cur_term;
88    if (SP_PARM)
89	SP_PARM->_term = termp;
90#if USE_REENTRANT
91    CurTerm = termp;
92#else
93    cur_term = termp;
94#endif
95    if (termp != 0) {
96#ifdef USE_TERM_DRIVER
97	TERMINAL_CONTROL_BLOCK *TCB = (TERMINAL_CONTROL_BLOCK *) termp;
98	ospeed = (NCURSES_OSPEED) _nc_ospeed(termp->_baudrate);
99	if (TCB->drv &&
100	    TCB->drv->isTerminfo &&
101	    TerminalType(termp).Strings) {
102	    PC = (char) ((pad_char != NULL) ? pad_char[0] : 0);
103	}
104	TCB->csp = SP_PARM;
105#else
106	ospeed = (NCURSES_OSPEED) _nc_ospeed(termp->_baudrate);
107	if (TerminalType(termp).Strings) {
108	    PC = (char) ((pad_char != NULL) ? pad_char[0] : 0);
109	}
110#endif
111#if !USE_REENTRANT
112	save_ttytype(termp);
113#endif
114    }
115    _nc_unlock_global(curses);
116
117    T((T_RETURN("%p"), (void *) oldterm));
118    return (oldterm);
119}
120
121#if NCURSES_SP_FUNCS
122NCURSES_EXPORT(TERMINAL *)
123set_curterm(TERMINAL *termp)
124{
125    return NCURSES_SP_NAME(set_curterm) (CURRENT_SCREEN, termp);
126}
127#endif
128
129NCURSES_EXPORT(int)
130NCURSES_SP_NAME(del_curterm) (NCURSES_SP_DCLx TERMINAL *termp)
131{
132    int rc = ERR;
133
134    T((T_CALLED("del_curterm(%p, %p)"), (void *) SP_PARM, (void *) termp));
135
136    if (termp != 0) {
137#ifdef USE_TERM_DRIVER
138	TERMINAL_CONTROL_BLOCK *TCB = (TERMINAL_CONTROL_BLOCK *) termp;
139#endif
140	TERMINAL *cur = (
141#if USE_REENTRANT
142			    NCURSES_SP_NAME(_nc_get_cur_term) (NCURSES_SP_ARG)
143#else
144			    cur_term
145#endif
146	);
147
148#if NCURSES_EXT_NUMBERS
149	_nc_free_termtype(&termp->type);
150#endif
151	_nc_free_termtype2(&TerminalType(termp));
152	if (termp == cur)
153	    NCURSES_SP_NAME(set_curterm) (NCURSES_SP_ARGx 0);
154
155	FreeIfNeeded(termp->_termname);
156#if USE_HOME_TERMINFO
157	if (_nc_globals.home_terminfo != 0) {
158	    FreeAndNull(_nc_globals.home_terminfo);
159	}
160#endif
161#ifdef USE_TERM_DRIVER
162	if (TCB->drv)
163	    TCB->drv->td_release(TCB);
164#endif
165#if NO_LEAKS
166	/* discard memory used in tgetent's cache for this terminal */
167	_nc_tgetent_leak(termp);
168#endif
169	free(termp);
170
171	rc = OK;
172    }
173    returnCode(rc);
174}
175
176#if NCURSES_SP_FUNCS
177NCURSES_EXPORT(int)
178del_curterm(TERMINAL *termp)
179{
180    int rc;
181
182    _nc_lock_global(curses);
183    rc = NCURSES_SP_NAME(del_curterm) (CURRENT_SCREEN, termp);
184    _nc_unlock_global(curses);
185
186    return (rc);
187}
188#endif
189