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+/****************************************************************************
+ * Copyright (c) 1998-2007,2008 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 *
+ ****************************************************************************/
+
+/*
+** lib_newterm.c
+**
+** The newterm() function.
+**
+*/
+
+#include <curses.priv.h>
+
+#if SVR4_TERMIO && !defined(_POSIX_SOURCE)
+#define _POSIX_SOURCE
+#endif
+
+#include <term.h> /* clear_screen, cup & friends, cur_term */
+#include <tic.h>
+
+MODULE_ID("$Id: lib_newterm.c,v 1.69 2008/04/12 18:15:04 tom Exp $")
+
+#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(void)
+{
+ int result = ERR;
+
+ /* for extended XPG4 conformance requires cbreak() at this point */
+ /* (SVr4 curses does this anyway) */
+ if (cbreak() == OK) {
+ TTY buf;
+
+ buf = cur_term->Nttyb;
+#ifdef TERMIOS
+ buf.c_lflag &= ~(ECHO | ECHONL);
+ buf.c_iflag &= ~(ICRNL | INLCR | IGNCR);
+ buf.c_oflag &= ~(ONLCR);
+#elif HAVE_SGTTY_H
+ buf.sg_flags &= ~(ECHO | CRMOD);
+#else
+ memset(&buf, 0, sizeof(buf));
+#endif
+ if ((result = _nc_set_tty_mode(&buf)) == OK)
+ cur_term->Nttyb = buf;
+ }
+ return 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)
+filter(void)
+{
+ START_TRACE();
+ T((T_CALLED("filter")));
+ _nc_prescreen.filter_mode = TRUE;
+ returnVoid;
+}
+
+#if NCURSES_EXT_FUNCS
+/*
+ * An extension, allowing the application to open a new screen without
+ * requiring it to also be filtered.
+ */
+NCURSES_EXPORT(void)
+nofilter(void)
+{
+ START_TRACE();
+ T((T_CALLED("nofilter")));
+ _nc_prescreen.filter_mode = FALSE;
+ returnVoid;
+}
+#endif
+
+NCURSES_EXPORT(SCREEN *)
+newterm(NCURSES_CONST char *name, FILE *ofp, FILE *ifp)
+{
+ int value;
+ int errret;
+ SCREEN *current;
+ SCREEN *result = 0;
+
+ START_TRACE();
+ T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp));
+
+ _nc_lock_global(set_SP);
+ /* this loads the capability entry, then sets LINES and COLS */
+ if (setupterm(name, fileno(ofp), &errret) != ERR) {
+ int slk_format = _nc_globals.slk_format;
+
+ /*
+ * This actually allocates the screen structure, and saves the original
+ * terminal settings.
+ */
+ current = SP;
+ _nc_set_screen(0);
+
+ /* allow user to set maximum escape delay from the environment */
+ if ((value = _nc_getenv_num("ESCDELAY")) >= 0) {
+ set_escdelay(value);
+ }
+
+ if (_nc_setupscreen(LINES,
+ COLS,
+ ofp,
+ _nc_prescreen.filter_mode,
+ slk_format) == ERR) {
+ _nc_set_screen(current);
+ result = 0;
+ } else {
+ /* if the terminal type has real soft labels, set those up */
+ if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format))
+ _nc_slk_initialize(stdscr, COLS);
+
+ SP->_ifd = fileno(ifp);
+ typeahead(fileno(ifp));
+#ifdef TERMIOS
+ SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 &&
+ !(cur_term->Ottyb.c_iflag & ISTRIP));
+#else
+ SP->_use_meta = FALSE;
+#endif
+ SP->_endwin = FALSE;
+
+ /*
+ * 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->_scrolling = ((scroll_forward && scroll_reverse) ||
+ ((parm_rindex ||
+ parm_insert_line ||
+ insert_line) &&
+ (parm_index ||
+ parm_delete_line ||
+ delete_line)));
+
+ baudrate(); /* sets a field in the SP structure */
+
+ SP->_keytry = 0;
+
+ /*
+ * 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->_use_rmso = SGR0_TEST(exit_standout_mode);
+ SP->_use_rmul = SGR0_TEST(exit_underline_mode);
+
+ /* compute movement costs so we can do better move optimization */
+ _nc_mvcur_init();
+
+ /* initialize terminal to a sane state */
+ _nc_screen_init();
+
+ /* Initialize the terminal line settings. */
+ _nc_initscr();
+
+ _nc_signal_handler(TRUE);
+
+ result = SP;
+ }
+ }
+ _nc_unlock_global(set_SP);
+ returnSP(result);
+}