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#ifndef TYPE
#error "Set TYPE before including self file"
#else
#include <stdarg.h>
#include "err.h"
#include "macro.h"
INIT_F ( TRIE(TYPE) ) {
NEW(TRIE_NODE(TYPE), t, '\0');
self->root = t;
return 0;
}
INIT_F (TRIE_NODE(TYPE), char c) {
self->c = c;
self->value = NULL;
self->next = NULL;
self->child = NULL;
return 0;
}
INIT_F (TRIE_NODE(TYPE),
char c,
TRIE_NODE(TYPE)* next,
TRIE_NODE(TYPE)* child )
{
self->c = c;
self->next = next;
self->child = child;
return 0;
}
int PUSH(TRIE(TYPE)) ( TRIE(TYPE)* trie, char* key, TYPE* val ) {
TRIE_NODE(TYPE) *cur, *last;
last = trie->root;
cur = last->child;
char* subkey = key;
while (1) {
if (cur == NULL) {
/* Build direct LL for remaining subkey */
for (char* c = subkey; c[0] != '\0'; c++) {
NEW(TRIE_NODE(TYPE), t, *c);
last->child = t;
last = t;
}
last->value = RESOLVE(TYPE)(last->value, val);
return 0;
} else if (cur->c == subkey[0]) {
/* This node belongs to the key,
* Decend further */
last = cur;
cur = cur->child;
subkey++;
} else if (subkey[0] == '\0') {
/* Key finished */
last->value = RESOLVE(TYPE)(last->value, val);
return 0;
} else if (cur->next != NULL) {
/* This node was not part of the set, but it's sibling might */
cur = cur->next;
/* `last` not set since we aren't moving down */
} else {
/* No node on self level was part of the set, create a new__
* sibling and follow down that parse */
NEW(TRIE_NODE(TYPE), t, *subkey);
cur->next = t;
last = cur;
cur = t;
}
}
return 0;
}
/*
* TODO what happens when I give an invalid key?
*/
TYPE* GET(TRIE(TYPE)) ( TRIE(TYPE)* trie, char* key ) {
TRIE_NODE(TYPE)* n = trie->root->child;
char* subkey = key;
while (n != NULL) {
if (subkey[1] == '\0') {
return n->value;
} else if (subkey[0] == n->c) {
n = n->child;
subkey++;
} else {
n = n->next;
}
}
ERR("Position not found");
return 0;
}
FREE_F(TRIE_NODE(TYPE)) {
if (self == NULL) return 0;
if (self->value != NULL) FFREE(TYPE, self->value);
if (self->next != NULL) FREE(TRIE_NODE(TYPE))(self->next);
if (self->child != NULL) FREE(TRIE_NODE(TYPE))(self->child);
free (self);
return 0;
}
FREE_F(TRIE(TYPE)) {
if (self->root->c != '\0') {
// ERR("Invalid trie");
return 1;
}
return FREE(TRIE_NODE(TYPE))(self->root);
}
int EMPTY(TRIE(TYPE))(TRIE(TYPE)* self) {
return self->root->child == NULL;
}
FMT_F(TRIE_NODE(TYPE)) {
va_list ap;
va_start(ap, buf);
int argc = va_arg(ap, int);
int depth = argc >= 1
? va_arg(ap, int)
: 0;
va_end(ap);
int seek = 0;
TRIE_NODE(TYPE)* n = self;
if (n == NULL) { fmtf("\n"); }
while (n != NULL) {
fmtf("|");
// FOR(int, i, depth) fmtf(" ");
for (int i = 0; i < depth; i++) fmtf(" ");
fmtf("%c ", n->c == '\0' ? '0' : n->c);
if (n->value != NULL) {
seek += FMT(TYPE)(n->value, buf + seek);
fmtf("\n");
}
if (n->child != NULL) {
fmtf("\n");
seek += FMT(TRIE_NODE(TYPE))(n->child, buf + seek, depth + 1);
}
n = n->next;
}
return seek;
}
FMT_F(TRIE(TYPE)) {
int seek = 0;
fmtf("Trie: %p: {\n", self);
seek += FMT(TRIE_NODE(TYPE))(self->root->child, buf + seek);
fmtf("}");
return seek;
}
#endif /* TYPE */
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