1 /****************************************************************************
2 * Copyright (c) 1998-2016,2017 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 * and: Juergen Pfeifer *
35 * some of the code in here was contributed by: *
36 * Magnus Bengtsson, d6mbeng@dtek.chalmers.se (Nov'93) *
37 * (but it has changed a lot) *
38 ****************************************************************************/
40 #define __INTERNAL_CAPS_VISIBLE
41 #include <curses.priv.h>
48 #define CUR SP_TERMTYPE
51 MODULE_ID("$Id: lib_termcap.c,v 1.84 2017/04/11 01:15:11 tom Exp $")
53 NCURSES_EXPORT_VAR(char *) UP = 0;
54 NCURSES_EXPORT_VAR(char *) BC = 0;
56 #define MyCache _nc_globals.tgetent_cache
57 #define CacheInx _nc_globals.tgetent_index
58 #define CacheSeq _nc_globals.tgetent_sequence
60 #define FIX_SGR0 MyCache[CacheInx].fix_sgr0
61 #define LAST_TRM MyCache[CacheInx].last_term
62 #define LAST_BUF MyCache[CacheInx].last_bufp
63 #define LAST_USE MyCache[CacheInx].last_used
64 #define LAST_SEQ MyCache[CacheInx].sequence
67 * Termcap names are matched only using the first two bytes.
68 * Ignore any extended names longer than two bytes, to avoid problems
69 * with legacy code which passes in parameters whose use is long forgotten.
71 #define ValidCap(cap) (((cap)[0] != '\0') && ((cap)[1] != '\0'))
72 #define SameCap(a,b) (((a)[0] == (b)[0]) && ((a)[1] == (b)[1]))
73 #define ValidExt(ext) (ValidCap(ext) && (ext)[2] == '\0')
75 /***************************************************************************
79 * In termcap, this function reads in the entry for terminal `term' into the
80 * buffer pointed to by bufp. It must be called before any of the functions
82 * In this terminfo emulation, tgetent() simply calls setupterm() (which
83 * does a bit more than tgetent() in termcap does), and returns its return
84 * value (1 if successful, 0 if no terminal with the given name could be
85 * found, or -1 if no terminal descriptions have been installed on the
86 * system). The bufp argument is ignored.
88 ***************************************************************************/
91 NCURSES_SP_NAME(tgetent) (NCURSES_SP_DCLx char *bufp, const char *name)
95 bool found_cache = FALSE;
96 #ifdef USE_TERM_DRIVER
101 T((T_CALLED("tgetent()")));
103 TINFO_SETUP_TERM(&termp, (NCURSES_CONST char *) name,
104 STDOUT_FILENO, &rc, TRUE);
106 #ifdef USE_TERM_DRIVER
108 !((TERMINAL_CONTROL_BLOCK *) termp)->drv->isTerminfo)
113 * In general we cannot tell if the fixed sgr0 is still used by the
114 * caller, but if tgetent() is called with the same buffer, that is
115 * good enough, since the previous data would be invalidated by the
118 * bufp may be a null pointer, e.g., GNU termcap. That allocates data,
119 * which is good until the next tgetent() call. The conventional termcap
120 * is inconvenient because of the fixed buffer size, but because it uses
121 * caller-supplied buffers, can have multiple terminal descriptions in
122 * use at a given time.
124 for (n = 0; n < TGETENT_MAX; ++n) {
125 bool same_result = (MyCache[n].last_used && MyCache[n].last_bufp == bufp);
129 FreeAndNull(FIX_SGR0);
132 * Also free the terminfo data that we loaded (much bigger leak).
134 if (LAST_TRM != 0 && LAST_TRM != TerminalOf(SP_PARM)) {
135 TERMINAL *trm = LAST_TRM;
136 NCURSES_SP_NAME(del_curterm) (NCURSES_SP_ARGx LAST_TRM);
137 for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx)
149 for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx) {
150 if (LAST_SEQ < MyCache[best].sequence) {
156 LAST_TRM = TerminalOf(SP_PARM);
157 LAST_SEQ = ++CacheSeq;
162 FIX_SGR0 = 0; /* don't free it - application may still use */
167 if ((backspaces_with_bs = (char) !strcmp(cursor_left, "\b")) == 0)
168 backspace_if_not_bs = cursor_left;
170 /* we're required to export these */
171 if (pad_char != NULL)
173 if (cursor_up != NULL)
175 if (backspace_if_not_bs != NULL)
176 BC = backspace_if_not_bs;
178 if ((FIX_SGR0 = _nc_trim_sgr0(&TerminalType(TerminalOf(SP_PARM))))
180 if (!strcmp(FIX_SGR0, exit_attribute_mode)) {
181 if (FIX_SGR0 != exit_attribute_mode) {
190 SetNoPadding(SP_PARM);
191 (void) NCURSES_SP_NAME(baudrate) (NCURSES_SP_ARG); /* sets ospeed as a side-effect */
195 #include <capdefaults.c>
205 tgetent(char *bufp, const char *name)
207 return NCURSES_SP_NAME(tgetent) (CURRENT_SCREEN, bufp, name);
213 same_tcname(const char *a, const char *b)
215 bool code = SameCap(a, b);
216 fprintf(stderr, "compare(%s,%s) %s\n", a, b, code ? "same" : "diff");
221 #define same_tcname(a,b) SameCap(a,b)
224 /***************************************************************************
228 * Look up boolean termcap capability str and return its value (TRUE=1 if
229 * present, FALSE=0 if not).
231 ***************************************************************************/
234 NCURSES_SP_NAME(tgetflag) (NCURSES_SP_DCLx NCURSES_CONST char *id)
236 int result = 0; /* Solaris returns zero for missing flag */
238 T((T_CALLED("tgetflag(%p, %s)"), (void *) SP_PARM, id));
239 if (HasTInfoTerminal(SP_PARM) && ValidCap(id)) {
240 TERMTYPE2 *tp = &TerminalType(TerminalOf(SP_PARM));
241 struct name_table_entry const *entry_ptr;
244 entry_ptr = _nc_find_type_entry(id, BOOLEAN, TRUE);
245 if (entry_ptr != 0) {
246 j = entry_ptr->nte_index;
251 for_each_ext_boolean(i, tp) {
252 const char *capname = ExtBoolname(tp, i, boolcodes);
253 if (same_tcname(id, capname) && ValidExt(capname)) {
261 /* note: setupterm forces invalid booleans to false */
262 result = tp->Booleans[j];
270 tgetflag(NCURSES_CONST char *id)
272 return NCURSES_SP_NAME(tgetflag) (CURRENT_SCREEN, id);
276 /***************************************************************************
280 * Look up numeric termcap capability str and return its value, or -1 if
283 ***************************************************************************/
286 NCURSES_SP_NAME(tgetnum) (NCURSES_SP_DCLx NCURSES_CONST char *id)
288 int result = ABSENT_NUMERIC;
290 T((T_CALLED("tgetnum(%p, %s)"), (void *) SP_PARM, id));
291 if (HasTInfoTerminal(SP_PARM) && ValidCap(id)) {
292 TERMTYPE2 *tp = &TerminalType(TerminalOf(SP_PARM));
293 struct name_table_entry const *entry_ptr;
296 entry_ptr = _nc_find_type_entry(id, NUMBER, TRUE);
297 if (entry_ptr != 0) {
298 j = entry_ptr->nte_index;
303 for_each_ext_number(i, tp) {
304 const char *capname = ExtNumname(tp, i, numcodes);
305 if (same_tcname(id, capname) && ValidExt(capname)) {
313 if (VALID_NUMERIC(tp->Numbers[j]))
314 result = tp->Numbers[j];
322 tgetnum(NCURSES_CONST char *id)
324 return NCURSES_SP_NAME(tgetnum) (CURRENT_SCREEN, id);
328 /***************************************************************************
332 * Look up string termcap capability str and return a pointer to its value,
333 * or NULL if not given.
335 ***************************************************************************/
337 NCURSES_EXPORT(char *)
338 NCURSES_SP_NAME(tgetstr) (NCURSES_SP_DCLx NCURSES_CONST char *id, char **area)
342 T((T_CALLED("tgetstr(%s,%p)"), id, (void *) area));
343 if (HasTInfoTerminal(SP_PARM) && ValidCap(id)) {
344 TERMTYPE2 *tp = &TerminalType(TerminalOf(SP_PARM));
345 struct name_table_entry const *entry_ptr;
348 entry_ptr = _nc_find_type_entry(id, STRING, TRUE);
349 if (entry_ptr != 0) {
350 j = entry_ptr->nte_index;
355 for_each_ext_string(i, tp) {
356 const char *capname = ExtStrname(tp, i, strcodes);
357 if (same_tcname(id, capname) && ValidExt(capname)) {
365 result = tp->Strings[j];
366 TR(TRACE_DATABASE, ("found match %d: %s", j, _nc_visbuf(result)));
367 /* setupterm forces canceled strings to null */
368 if (VALID_STRING(result)) {
369 if (result == exit_attribute_mode
372 TR(TRACE_DATABASE, ("altered to : %s", _nc_visbuf(result)));
376 _nc_STRCPY(*area, result, 1024);
378 *area += strlen(*area) + 1;
387 NCURSES_EXPORT(char *)
388 tgetstr(NCURSES_CONST char *id, char **area)
390 return NCURSES_SP_NAME(tgetstr) (CURRENT_SCREEN, id, area);
398 _nc_tgetent_leak(TERMINAL *termp)
402 for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx) {
403 if (LAST_TRM == termp) {
404 FreeIfNeeded(FIX_SGR0);
415 _nc_tgetent_leaks(void)
418 for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx) {
420 del_curterm(LAST_TRM);
421 _nc_tgetent_leak(LAST_TRM);