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/*
This file is part of ct.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with ct. If not, see <https://www.gnu.org/licenses/>.
*/
#include "tt_llcht.h"
// ===================================================================
// Variables
// ===================================================================
static tt_entry_t *table[TT_LLCHT_SIZE+1];
// ===================================================================
// Helper declarations
// ===================================================================
tt_entry_t * new_ll_node(const uint64_t key, const enum TT_FLAG flag,
const uint8_t depth, const float value,
const action_t action);
// ===================================================================
// Exported functions
// ===================================================================
int tt_init(void) {
for (uint32_t k=0; k<=TT_LLCHT_SIZE; k++)
table[k] = NULL;
return EXIT_SUCCESS;
}
void tt_free(void) {
tt_entry_t *n, *nn;
for (uint32_t k=0; k<=TT_LLCHT_SIZE; k++) {
n = table[k];
while (n) {
nn = n->next;
free(n);
n = nn;
}
}
}
tt_entry_t *tt_seek(const uint64_t key) {
tt_entry_t *lookup = table[key & TT_LLCHT_SIZE];
while (lookup && lookup->key != key)
lookup = lookup->next;
return lookup;
}
int tt_insert(const uint64_t key, const enum TT_FLAG flag,
const uint8_t depth, const float value,
const action_t action) {
tt_entry_t *new = new_ll_node(key, flag, depth, value, action), *n;
// TODO: trap
const uint32_t idx = key & TT_LLCHT_SIZE;
if ((n = table[idx]) != NULL) {
for (; n->next != NULL; n = n->next);
n->next = new;
} else {
table[idx] = new;
}
return EXIT_SUCCESS;
}
// ===================================================================
// Helper function implementations
// ===================================================================
tt_entry_t * new_ll_node(const uint64_t key, const enum TT_FLAG flag,
const uint8_t depth, const float value,
const action_t action) {
tt_entry_t *new = malloc(sizeof(struct tt_node_s));
// TODO: trap errno
new->key = key;
new->next = NULL;
new->flag = flag;
new->depth = depth;
new->value = value;
new->action = action;
return new;
}
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