Add ncurses 6.4

third_party/ncurses/keyok.c

@@ -0,0 +1,103 @@
+/****************************************************************************
+ * Copyright 2019-2020,2021 Thomas E. Dickey                                *
+ * Copyright 1998-2012,2014 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: Thomas E. Dickey                        1997-on                 *
+ *     and: Juergen Pfeifer                         2009                    *
+ ****************************************************************************/
+
+#include "curses.priv.h"
+
+MODULE_ID("$Id: keyok.c,v 1.17 2021/06/17 21:26:02 tom Exp $")
+
+/*
+ * Enable (or disable) ncurses' interpretation of a keycode by adding (or
+ * removing) the corresponding 'tries' entry.
+ *
+ * Do this by storing a second tree of tries, which records the disabled keys.
+ * The simplest way to copy is to make a function that returns the string (with
+ * nulls set to 0200), then use that to reinsert the string into the
+ * corresponding tree.
+ */
+
+NCURSES_EXPORT(int)
+NCURSES_SP_NAME(keyok) (NCURSES_SP_DCLx int c, bool flag)
+{
+    int code = ERR;
+
+    if (HasTerminal(SP_PARM)) {
+	T((T_CALLED("keyok(%p, %d,%d)"), (void *) SP_PARM, c, flag));
+#ifdef USE_TERM_DRIVER
+	code = CallDriver_2(sp, td_kyOk, c, flag);
+#else
+	if (c >= 0) {
+	    int count = 0;
+	    char *s;
+	    unsigned ch = (unsigned) c;
+
+	    if (flag) {
+		while ((s = _nc_expand_try(SP_PARM->_key_ok,
+					   ch, &count, (size_t) 0)) != 0) {
+		    if (_nc_remove_key(&(SP_PARM->_key_ok), ch)) {
+			code = _nc_add_to_try(&(SP_PARM->_keytry), s, ch);
+			free(s);
+			count = 0;
+			if (code != OK)
+			    break;
+		    } else {
+			free(s);
+		    }
+		}
+	    } else {
+		while ((s = _nc_expand_try(SP_PARM->_keytry,
+					   ch, &count, (size_t) 0)) != 0) {
+		    if (_nc_remove_key(&(SP_PARM->_keytry), ch)) {
+			code = _nc_add_to_try(&(SP_PARM->_key_ok), s, ch);
+			free(s);
+			count = 0;
+			if (code != OK)
+			    break;
+		    } else {
+			free(s);
+		    }
+		}
+	    }
+	}
+#endif
+    }
+    returnCode(code);
+}
+
+#if NCURSES_SP_FUNCS
+NCURSES_EXPORT(int)
+keyok(int c, bool flag)
+{
+    return NCURSES_SP_NAME(keyok) (CURRENT_SCREEN, c, flag);
+}
+#endif