add_tries.c revision 225736
11590Srgrimes/**************************************************************************** 21590Srgrimes * Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. * 31590Srgrimes * * 41590Srgrimes * Permission is hereby granted, free of charge, to any person obtaining a * 51590Srgrimes * copy of this software and associated documentation files (the * 61590Srgrimes * "Software"), to deal in the Software without restriction, including * 71590Srgrimes * without limitation the rights to use, copy, modify, merge, publish, * 81590Srgrimes * distribute, distribute with modifications, sublicense, and/or sell * 91590Srgrimes * copies of the Software, and to permit persons to whom the Software is * 101590Srgrimes * furnished to do so, subject to the following conditions: * 111590Srgrimes * * 121590Srgrimes * The above copyright notice and this permission notice shall be included * 131590Srgrimes * in all copies or substantial portions of the Software. * 141590Srgrimes * * 151590Srgrimes * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 161590Srgrimes * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 171590Srgrimes * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 181590Srgrimes * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 191590Srgrimes * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 201590Srgrimes * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 211590Srgrimes * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 221590Srgrimes * * 231590Srgrimes * Except as contained in this notice, the name(s) of the above copyright * 241590Srgrimes * holders shall not be used in advertising or otherwise to promote the * 251590Srgrimes * sale, use or other dealings in this Software without prior written * 261590Srgrimes * authorization. * 271590Srgrimes ****************************************************************************/ 281590Srgrimes 291590Srgrimes/**************************************************************************** 301590Srgrimes * Author: Thomas E. Dickey 1998-on * 311590Srgrimes ****************************************************************************/ 321590Srgrimes 331590Srgrimes/* 341590Srgrimes** add_tries.c 351590Srgrimes** 361590Srgrimes** Add keycode/string to tries-tree. 371590Srgrimes** 381590Srgrimes*/ 391590Srgrimes 401590Srgrimes#include <curses.priv.h> 411590Srgrimes 421590SrgrimesMODULE_ID("$Id: add_tries.c,v 1.8 2006/12/30 23:15:26 tom Exp $") 431590Srgrimes 441590Srgrimes#define SET_TRY(dst,src) if ((dst->ch = *src++) == 128) dst->ch = '\0' 451590Srgrimes#define CMP_TRY(a,b) ((a)? (a == b) : (b == 128)) 461590Srgrimes 471590SrgrimesNCURSES_EXPORT(int) 481590Srgrimes_nc_add_to_try(TRIES ** tree, const char *str, unsigned code) 491590Srgrimes{ 501590Srgrimes TRIES *ptr, *savedptr; 511590Srgrimes unsigned const char *txt = (unsigned const char *) str; 521590Srgrimes 531590Srgrimes T((T_CALLED("_nc_add_to_try(%p, %s, %u)"), *tree, _nc_visbuf(str), code)); 541590Srgrimes if (txt == 0 || *txt == '\0' || code == 0) 551590Srgrimes returnCode(ERR); 561590Srgrimes 571590Srgrimes if ((*tree) != 0) { 581590Srgrimes ptr = savedptr = (*tree); 591590Srgrimes 601590Srgrimes for (;;) { 611590Srgrimes unsigned char cmp = *txt; 621590Srgrimes 631590Srgrimes while (!CMP_TRY(ptr->ch, cmp) 641590Srgrimes && ptr->sibling != 0) 651590Srgrimes ptr = ptr->sibling; 661590Srgrimes 671590Srgrimes if (CMP_TRY(ptr->ch, cmp)) { 681590Srgrimes if (*(++txt) == '\0') { 691590Srgrimes ptr->value = code; 701590Srgrimes returnCode(OK); 711590Srgrimes } 721590Srgrimes if (ptr->child != 0) 731590Srgrimes ptr = ptr->child; 741590Srgrimes else 751590Srgrimes break; 761590Srgrimes } else { 771590Srgrimes if ((ptr->sibling = typeCalloc(TRIES, 1)) == 0) { 781590Srgrimes returnCode(ERR); 791590Srgrimes } 801590Srgrimes 811590Srgrimes savedptr = ptr = ptr->sibling; 8218730Ssteve SET_TRY(ptr, txt); 835814Sjkh ptr->value = 0; 8418730Ssteve 8518730Ssteve break; 861590Srgrimes } 871590Srgrimes } /* end for (;;) */ 881590Srgrimes } else { /* (*tree) == 0 :: First sequence to be added */ 891590Srgrimes savedptr = ptr = (*tree) = typeCalloc(TRIES, 1); 901590Srgrimes 911590Srgrimes if (ptr == 0) { 921590Srgrimes returnCode(ERR); 931590Srgrimes } 941590Srgrimes 951590Srgrimes SET_TRY(ptr, txt); 961590Srgrimes ptr->value = 0; 971590Srgrimes } 981590Srgrimes 991590Srgrimes /* at this point, we are adding to the try. ptr->child == 0 */ 1001590Srgrimes 1011590Srgrimes while (*txt) { 10218730Ssteve ptr->child = typeCalloc(TRIES, 1); 1031590Srgrimes 1041590Srgrimes ptr = ptr->child; 1051590Srgrimes 1061590Srgrimes if (ptr == 0) { 1071590Srgrimes while ((ptr = savedptr) != 0) { 1081590Srgrimes savedptr = ptr->child; 1091590Srgrimes free(ptr); 1101590Srgrimes } 1111590Srgrimes returnCode(ERR); 1121590Srgrimes } 11317193Sbde 11417193Sbde SET_TRY(ptr, txt); 11518730Ssteve ptr->value = 0; 1161590Srgrimes } 1171590Srgrimes 1181590Srgrimes ptr->value = code; 1191590Srgrimes returnCode(OK); 1201590Srgrimes} 1211590Srgrimes