1 /* $OpenBSD: keyok.c,v 1.4 2006/05/14 09:01:06 espie Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Thomas E. Dickey <dickey@clark.net> 1997 * 33 ****************************************************************************/ 34 35 #include <curses.priv.h> 36 #include <limits.h> 37 38 MODULE_ID("$From: keyok.c,v 1.5 2000/12/10 02:43:26 tom Exp $") 39 40 /* 41 * Enable (or disable) ncurses' interpretation of a keycode by adding (or 42 * removing) the corresponding 'tries' entry. 43 * 44 * Do this by storing a second tree of tries, which records the disabled keys. 45 * The simplest way to copy is to make a function that returns the string (with 46 * nulls set to 0200), then use that to reinsert the string into the 47 * corresponding tree. 48 */ 49 50 NCURSES_EXPORT(int) 51 keyok(int c, bool flag) 52 { 53 int code = ERR; 54 int count = 0; 55 char *s; 56 57 T((T_CALLED("keyok(%d,%d)"), c, flag)); 58 if (c >= 0 && c <= (int)USHRT_MAX) { 59 unsigned short k = (unsigned short) c; 60 if (flag) { 61 while ((s = _nc_expand_try(SP->_key_ok, k, &count, 0)) != 0 62 && _nc_remove_key(&(SP->_key_ok), k)) { 63 _nc_add_to_try(&(SP->_keytry), s, k); 64 free(s); 65 code = OK; 66 count = 0; 67 } 68 } else { 69 while ((s = _nc_expand_try(SP->_keytry, k, &count, 0)) != 0 70 && _nc_remove_key(&(SP->_keytry), k)) { 71 _nc_add_to_try(&(SP->_key_ok), s, k); 72 free(s); 73 code = OK; 74 count = 0; 75 } 76 } 77 } 78 returnCode(code); 79 } 80