1 /****************************************************************************
2 * Copyright 2019,2020 Thomas E. Dickey *
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28 ****************************************************************************/
30 /****************************************************************************
31 * Author: Thomas E. Dickey 1998-on *
32 ****************************************************************************/
37 ** Add keycode/string to tries-tree.
41 #include <curses.priv.h>
43 MODULE_ID("$Id: add_tries.c,v 1.12 2020/02/02 23:34:34 tom Exp $")
45 #define SET_TRY(dst,src) if ((dst->ch = *src++) == 128) dst->ch = '\0'
46 #define CMP_TRY(a,b) ((a)? (a == b) : (b == 128))
49 _nc_add_to_try(TRIES ** tree, const char *str, unsigned code)
51 TRIES *ptr, *savedptr;
52 unsigned const char *txt = (unsigned const char *) str;
54 T((T_CALLED("_nc_add_to_try(%p, %s, %u)"),
55 (void *) *tree, _nc_visbuf(str), code));
56 if (txt == 0 || *txt == '\0' || code == 0)
60 ptr = savedptr = (*tree);
63 unsigned char cmp = *txt;
65 while (!CMP_TRY(ptr->ch, cmp)
69 if (CMP_TRY(ptr->ch, cmp)) {
70 if (*(++txt) == '\0') {
71 ptr->value = (unsigned short) code;
79 if ((ptr->sibling = typeCalloc(TRIES, 1)) == 0) {
83 savedptr = ptr = ptr->sibling;
90 } else { /* (*tree) == 0 :: First sequence to be added */
91 savedptr = ptr = (*tree) = typeCalloc(TRIES, 1);
101 /* at this point, we are adding to the try. ptr->child == 0 */
104 ptr->child = typeCalloc(TRIES, 1);
109 while ((ptr = savedptr) != 0) {
110 savedptr = ptr->child;
121 ptr->value = (unsigned short) code;