1 /**************************************************************************** 2 * Copyright (c) 1998-2000,2006 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Thomas E. Dickey 1997-on * 31 ****************************************************************************/ 32 33 #include <curses.priv.h> 34 35 MODULE_ID("$Id: keyok.c,v 1.7 2006/12/30 16:22:33 tom Exp $") 36 37 /* 38 * Enable (or disable) ncurses' interpretation of a keycode by adding (or 39 * removing) the corresponding 'tries' entry. 40 * 41 * Do this by storing a second tree of tries, which records the disabled keys. 42 * The simplest way to copy is to make a function that returns the string (with 43 * nulls set to 0200), then use that to reinsert the string into the 44 * corresponding tree. 45 */ 46 47 NCURSES_EXPORT(int) 48 keyok(int c, bool flag) 49 { 50 int code = ERR; 51 int count = 0; 52 char *s; 53 54 T((T_CALLED("keyok(%d,%d)"), c, flag)); 55 if (c >= 0) { 56 unsigned ch = (unsigned) c; 57 if (flag) { 58 while ((s = _nc_expand_try(SP->_key_ok, ch, &count, 0)) != 0 59 && _nc_remove_key(&(SP->_key_ok), ch)) { 60 code = _nc_add_to_try(&(SP->_keytry), s, ch); 61 free(s); 62 count = 0; 63 if (code != OK) 64 break; 65 } 66 } else { 67 while ((s = _nc_expand_try(SP->_keytry, ch, &count, 0)) != 0 68 && _nc_remove_key(&(SP->_keytry), ch)) { 69 code = _nc_add_to_try(&(SP->_key_ok), s, ch); 70 free(s); 71 count = 0; 72 if (code != OK) 73 break; 74 } 75 } 76 } 77 returnCode(code); 78 } 79