Add ncurses 6.4

third_party/ncurses/lib_newterm.c

@@ -0,0 +1,375 @@
+/****************************************************************************
+ * Copyright 2018-2020,2022 Thomas E. Dickey                                *
+ * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
+ *     and: Juergen Pfeifer                         2009                    *
+ ****************************************************************************/
+
+/*
+**	lib_newterm.c
+**
+**	The newterm() function.
+**
+*/
+
+#include "curses.priv.h"
+
+#ifndef CUR
+#define CUR SP_TERMTYPE
+#endif
+
+#include "tic.h"
+
+MODULE_ID("$Id: lib_newterm.c,v 1.104 2022/07/09 18:58:58 tom Exp $")
+
+#ifdef USE_TERM_DRIVER
+#define NumLabels      InfoOf(SP_PARM).numlabels
+#else
+#define NumLabels      num_labels
+#endif
+
+#ifndef ONLCR			/* Allows compilation under the QNX 4.2 OS */
+#define ONLCR 0
+#endif
+
+/*
+ * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not
+ * restored during the curses session.  The library simulates echo in software.
+ * (The behavior is unspecified if the application enables hardware echo).
+ *
+ * The newterm function also initializes terminal settings, and since initscr
+ * is supposed to behave as if it calls newterm, we do it here.
+ */
+static NCURSES_INLINE int
+_nc_initscr(NCURSES_SP_DCL0)
+{
+    int result = ERR;
+    TERMINAL *term = TerminalOf(SP_PARM);
+
+    /* for extended XPG4 conformance requires cbreak() at this point */
+    /* (SVr4 curses does this anyway) */
+    T((T_CALLED("_nc_initscr(%p) ->term %p"), (void *) SP_PARM, (void *) term));
+    if (NCURSES_SP_NAME(cbreak) (NCURSES_SP_ARG) == OK) {
+	TTY buf;
+
+	buf = term->Nttyb;
+#ifdef TERMIOS
+	buf.c_lflag &= (unsigned) ~(ECHO | ECHONL);
+	buf.c_iflag &= (unsigned) ~(ICRNL | INLCR | IGNCR);
+	buf.c_oflag &= (unsigned) ~(ONLCR);
+#elif HAVE_SGTTY_H
+	buf.sg_flags &= ~(ECHO | CRMOD);
+#elif defined(EXP_WIN32_DRIVER)
+	buf.dwFlagIn = CONMODE_IN_DEFAULT;
+	buf.dwFlagOut = CONMODE_OUT_DEFAULT | VT_FLAG_OUT;
+	if (WINCONSOLE.isTermInfoConsole) {
+	    buf.dwFlagIn |= VT_FLAG_IN;
+	}
+#else
+	memset(&buf, 0, sizeof(buf));
+#endif
+	result = NCURSES_SP_NAME(_nc_set_tty_mode) (NCURSES_SP_ARGx &buf);
+	if (result == OK)
+	    term->Nttyb = buf;
+    }
+    returnCode(result);
+}
+
+/*
+ * filter() has to be called before either initscr() or newterm(), so there is
+ * apparently no way to make this flag apply to some terminals and not others,
+ * aside from possibly delaying a filter() call until some terminals have been
+ * initialized.
+ */
+NCURSES_EXPORT(void)
+NCURSES_SP_NAME(filter) (NCURSES_SP_DCL0)
+{
+    START_TRACE();
+    T((T_CALLED("filter(%p)"), (void *) SP_PARM));
+#if NCURSES_SP_FUNCS
+    if (IsPreScreen(SP_PARM)) {
+	SP_PARM->_filtered = TRUE;
+    }
+#else
+    _nc_prescreen.filter_mode = TRUE;
+#endif
+    returnVoid;
+}
+
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(void)
+filter(void)
+{
+    START_TRACE();
+    T((T_CALLED("filter()")));
+    _nc_prescreen.filter_mode = TRUE;
+    returnVoid;
+}
+#endif
+
+#if NCURSES_EXT_FUNCS
+/*
+ * An extension, allowing the application to open a new screen without
+ * requiring it to also be filtered.
+ */
+NCURSES_EXPORT(void)
+NCURSES_SP_NAME(nofilter) (NCURSES_SP_DCL0)
+{
+    START_TRACE();
+    T((T_CALLED("nofilter(%p)"), (void *) SP_PARM));
+#if NCURSES_SP_FUNCS
+    if (IsPreScreen(SP_PARM)) {
+	SP_PARM->_filtered = FALSE;
+    }
+#else
+    _nc_prescreen.filter_mode = FALSE;
+#endif
+    returnVoid;
+}
+
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(void)
+nofilter(void)
+{
+    START_TRACE();
+    T((T_CALLED("nofilter()")));
+    _nc_prescreen.filter_mode = FALSE;
+    returnVoid;
+}
+#endif
+#endif /* NCURSES_EXT_FUNCS */
+
+NCURSES_EXPORT(SCREEN *)
+NCURSES_SP_NAME(newterm) (NCURSES_SP_DCLx
+			  const char *name,
+			  FILE *ofp,
+			  FILE *ifp)
+{
+    int errret;
+    SCREEN *result = 0;
+    SCREEN *current;
+    TERMINAL *its_term;
+    FILE *_ofp = ofp ? ofp : stdout;
+    FILE *_ifp = ifp ? ifp : stdin;
+    TERMINAL *new_term = 0;
+
+    START_TRACE();
+    T((T_CALLED("newterm(%p, \"%s\", %p,%p)"),
+       (void *) SP_PARM,
+       (name ? name : ""),
+       (void *) ofp,
+       (void *) ifp));
+
+#if NCURSES_SP_FUNCS
+    assert(SP_PARM != 0);
+    if (SP_PARM == 0)
+	returnSP(SP_PARM);
+#endif
+
+    _nc_init_pthreads();
+    _nc_lock_global(curses);
+
+    current = CURRENT_SCREEN;
+    its_term = (current ? current->_term : 0);
+
+#if defined(EXP_WIN32_DRIVER)
+    _setmode(fileno(_ifp), _O_BINARY);
+    _setmode(fileno(_ofp), _O_BINARY);
+#endif
+
+    INIT_TERM_DRIVER();
+    /* this loads the capability entry, then sets LINES and COLS */
+    if (
+	   TINFO_SETUP_TERM(&new_term, name,
+			    fileno(_ofp), &errret, FALSE) != ERR) {
+	int slk_format;
+	int filter_mode;
+
+	_nc_set_screen(0);
+#ifdef USE_TERM_DRIVER
+	assert(new_term != 0);
+#endif
+
+#if NCURSES_SP_FUNCS
+	slk_format = SP_PARM->slk_format;
+	filter_mode = SP_PARM->_filtered;
+#else
+	slk_format = _nc_globals.slk_format;
+	filter_mode = _nc_prescreen.filter_mode;
+#endif
+
+	/*
+	 * This actually allocates the screen structure, and saves the original
+	 * terminal settings.
+	 */
+	if (NCURSES_SP_NAME(_nc_setupscreen) (
+#if NCURSES_SP_FUNCS
+						 &SP_PARM,
+#endif
+						 *(ptrLines(SP_PARM)),
+						 *(ptrCols(SP_PARM)),
+						 _ofp,
+						 filter_mode,
+						 slk_format) == ERR) {
+	    _nc_set_screen(current);
+	    result = 0;
+	} else {
+	    int value;
+	    int cols;
+
+#ifdef USE_TERM_DRIVER
+	    TERMINAL_CONTROL_BLOCK *TCB;
+#elif !NCURSES_SP_FUNCS
+	    _nc_set_screen(CURRENT_SCREEN);
+#endif
+	    assert(SP_PARM != 0);
+	    cols = *(ptrCols(SP_PARM));
+#ifdef USE_TERM_DRIVER
+	    _nc_set_screen(SP_PARM);
+	    TCB = (TERMINAL_CONTROL_BLOCK *) new_term;
+	    TCB->csp = SP_PARM;
+#endif
+	    /*
+	     * In setupterm() we did a set_curterm(), but it was before we set
+	     * CURRENT_SCREEN.  So the "current" screen's terminal pointer was
+	     * overwritten with a different terminal.  Later, in
+	     * _nc_setupscreen(), we set CURRENT_SCREEN and the terminal
+	     * pointer in the new screen.
+	     *
+	     * Restore the terminal-pointer for the pre-existing screen, if
+	     * any.
+	     */
+	    if (current)
+		current->_term = its_term;
+
+#ifdef USE_TERM_DRIVER
+	    SP_PARM->_term = new_term;
+#else
+	    new_term = SP_PARM->_term;
+#endif
+
+	    /* allow user to set maximum escape delay from the environment */
+	    if ((value = _nc_getenv_num("ESCDELAY")) >= 0) {
+#if NCURSES_EXT_FUNCS
+		NCURSES_SP_NAME(set_escdelay) (NCURSES_SP_ARGx value);
+#else
+		ESCDELAY = value;
+#endif
+	    }
+
+	    /* if the terminal type has real soft labels, set those up */
+	    if (slk_format && NumLabels > 0 && SLK_STDFMT(slk_format))
+		_nc_slk_initialize(StdScreen(SP_PARM), cols);
+
+	    SP_PARM->_ifd = fileno(_ifp);
+	    NCURSES_SP_NAME(typeahead) (NCURSES_SP_ARGx fileno(_ifp));
+#ifdef TERMIOS
+	    SP_PARM->_use_meta = ((new_term->Ottyb.c_cflag & CSIZE) == CS8 &&
+				  !(new_term->Ottyb.c_iflag & ISTRIP)) ||
+		USE_KLIBC_KBD;
+#else
+	    SP_PARM->_use_meta = FALSE;
+#endif
+	    SP_PARM->_endwin = ewInitial;
+#ifndef USE_TERM_DRIVER
+	    /*
+	     * Check whether we can optimize scrolling under dumb terminals in
+	     * case we do not have any of these capabilities, scrolling
+	     * optimization will be useless.
+	     */
+	    SP_PARM->_scrolling = ((scroll_forward && scroll_reverse) ||
+				   ((parm_rindex ||
+				     parm_insert_line ||
+				     insert_line) &&
+				    (parm_index ||
+				     parm_delete_line ||
+				     delete_line)));
+#endif
+
+	    NCURSES_SP_NAME(baudrate) (NCURSES_SP_ARG);		/* sets a field in the screen structure */
+
+	    SP_PARM->_keytry = 0;
+
+	    /* compute movement costs so we can do better move optimization */
+#ifdef USE_TERM_DRIVER
+	    TCBOf(SP_PARM)->drv->td_scinit(SP_PARM);
+#else /* ! USE_TERM_DRIVER */
+	    /*
+	     * Check for mismatched graphic-rendition capabilities.  Most SVr4
+	     * terminfo trees contain entries that have rmul or rmso equated to
+	     * sgr0 (Solaris curses copes with those entries).  We do this only
+	     * for curses, since many termcap applications assume that
+	     * smso/rmso and smul/rmul are paired, and will not function
+	     * properly if we remove rmso or rmul.  Curses applications
+	     * shouldn't be looking at this detail.
+	     */
+#define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode))
+	    SP_PARM->_use_rmso = SGR0_TEST(exit_standout_mode);
+	    SP_PARM->_use_rmul = SGR0_TEST(exit_underline_mode);
+#if USE_ITALIC
+	    SP_PARM->_use_ritm = SGR0_TEST(exit_italics_mode);
+#endif
+
+	    /* compute movement costs so we can do better move optimization */
+	    _nc_mvcur_init();
+
+	    /* initialize terminal to a sane state */
+	    _nc_screen_init();
+#endif /* USE_TERM_DRIVER */
+
+	    /* Initialize the terminal line settings. */
+	    _nc_initscr(NCURSES_SP_ARG);
+
+	    _nc_signal_handler(TRUE);
+	    result = SP_PARM;
+	}
+    }
+    _nc_unlock_global(curses);
+    returnSP(result);
+}
+
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(SCREEN *)
+newterm(const char *name, FILE *ofp, FILE *ifp)
+{
+    SCREEN *rc;
+
+    _nc_init_pthreads();
+    _nc_lock_global(prescreen);
+    START_TRACE();
+    rc = NCURSES_SP_NAME(newterm) (CURRENT_SCREEN_PRE, name, ofp, ifp);
+    _nc_forget_prescr();
+    _nc_unlock_global(prescreen);
+
+    return rc;
+}
+#endif