1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 2003-2006,2009 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Thomas E. Dickey, 2003 * 32 ****************************************************************************/ 33 34 #include <curses.priv.h> 35 36 MODULE_ID("$Id: key_defined.c,v 1.10 2020/02/02 23:34:34 tom Exp $") 37 38 static int 39 find_definition(TRIES * tree, const char *str) 40 { 41 TRIES *ptr; 42 int result = OK; 43 44 if (str != 0 && *str != '\0') { 45 for (ptr = tree; ptr != 0; ptr = ptr->sibling) { 46 if (UChar(*str) == UChar(ptr->ch)) { 47 if (str[1] == '\0' && ptr->child != 0) { 48 result = ERR; 49 } else if ((result = find_definition(ptr->child, str + 1)) 50 == OK) { 51 result = ptr->value; 52 } else if (str[1] == '\0') { 53 result = ERR; 54 } 55 } 56 if (result != OK) 57 break; 58 } 59 } 60 return (result); 61 } 62 63 /* 64 * Returns the keycode associated with the given string. If none is found, 65 * return OK. If the string is only a prefix to other strings, return ERR. 66 * Otherwise, return the keycode's value (neither OK/ERR). 67 */ 68 NCURSES_EXPORT(int) 69 NCURSES_SP_NAME(key_defined) (NCURSES_SP_DCLx const char *str) 70 { 71 int code = ERR; 72 73 T((T_CALLED("key_defined(%p, %s)"), (void *) SP_PARM, _nc_visbuf(str))); 74 if (SP_PARM != 0 && str != 0) { 75 code = find_definition(SP_PARM->_keytry, str); 76 } 77 78 returnCode(code); 79 } 80 81 #if NCURSES_SP_FUNCS 82 NCURSES_EXPORT(int) 83 key_defined(const char *str) 84 { 85 return NCURSES_SP_NAME(key_defined) (CURRENT_SCREEN, str); 86 } 87 #endif 88