1 /* $OpenBSD: keyok.c,v 1.5 2010/01/12 23:22:05 nicm Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998-2000,2006 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 1997-on * 33 ****************************************************************************/ 34 35 #include <curses.priv.h> 36 37 MODULE_ID("$Id: keyok.c,v 1.5 2010/01/12 23:22:05 nicm Exp $") 38 39 /* 40 * Enable (or disable) ncurses' interpretation of a keycode by adding (or 41 * removing) the corresponding 'tries' entry. 42 * 43 * Do this by storing a second tree of tries, which records the disabled keys. 44 * The simplest way to copy is to make a function that returns the string (with 45 * nulls set to 0200), then use that to reinsert the string into the 46 * corresponding tree. 47 */ 48 49 NCURSES_EXPORT(int) 50 keyok(int c, bool flag) 51 { 52 int code = ERR; 53 int count = 0; 54 char *s; 55 56 T((T_CALLED("keyok(%d,%d)"), c, flag)); 57 if (c >= 0) { 58 unsigned ch = (unsigned) c; 59 if (flag) { 60 while ((s = _nc_expand_try(SP->_key_ok, ch, &count, 0)) != 0 61 && _nc_remove_key(&(SP->_key_ok), ch)) { 62 code = _nc_add_to_try(&(SP->_keytry), s, ch); 63 free(s); 64 count = 0; 65 if (code != OK) 66 break; 67 } 68 } else { 69 while ((s = _nc_expand_try(SP->_keytry, ch, &count, 0)) != 0 70 && _nc_remove_key(&(SP->_keytry), ch)) { 71 code = _nc_add_to_try(&(SP->_key_ok), s, ch); 72 free(s); 73 count = 0; 74 if (code != OK) 75 break; 76 } 77 } 78 } 79 returnCode(code); 80 } 81