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/*
Copyright 2013 Michael Pavone
This file is part of BlastEm.
BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
*/
#include "tern.h"
#include <stddef.h>
#include <stdlib.h>
tern_node * tern_insert(tern_node * head, char * key, tern_val value)
{
tern_node ** cur = &head;
while(*key)
{
if (*cur) {
while(*cur && (*cur)->el != *key)
{
if (*key < (*cur)->el) {
cur = &(*cur)->left;
} else {
cur = &(*cur)->right;
}
}
}
if (!*cur) {
*cur = malloc(sizeof(tern_node));
(*cur)->left = NULL;
(*cur)->right = NULL;
(*cur)->straight.next = NULL;
(*cur)->el = *key;
}
cur = &((*cur)->straight.next);
key++;
}
while(*cur && (*cur)->el)
{
cur = &(*cur)->left;
}
if (!*cur) {
*cur = malloc(sizeof(tern_node));
(*cur)->left = NULL;
(*cur)->right = NULL;
(*cur)->el = 0;
}
(*cur)->straight.value = value;
return head;
}
int tern_find(tern_node * head, char * key, tern_val *ret)
{
tern_node * cur = head;
while (cur)
{
if (cur->el == *key) {
if (*key) {
cur = cur->straight.next;
key++;
} else {
*ret = cur->straight.value;
return 1;
}
} else if (*key < cur->el) {
cur = cur->left;
} else {
cur = cur->right;
}
}
return 0;
}
tern_node * tern_find_prefix(tern_node * head, char * key)
{
tern_node * cur = head;
while (cur && *key)
{
if (cur->el == *key) {
cur = cur->straight.next;
key++;
} else if (*key < cur->el) {
cur = cur->left;
} else {
cur = cur->right;
}
}
return cur;
}
intptr_t tern_find_int(tern_node * head, char * key, intptr_t def)
{
tern_val ret;
if (tern_find(head, key, &ret)) {
return ret.intval;
}
return def;
}
tern_node * tern_insert_int(tern_node * head, char * key, intptr_t value)
{
tern_val val;
val.intval = value;
return tern_insert(head, key, val);
}
void * tern_find_ptr_default(tern_node * head, char * key, void * def)
{
tern_val ret;
if (tern_find(head, key, &ret)) {
return ret.ptrval;
}
return def;
}
void * tern_find_ptr(tern_node * head, char * key)
{
return tern_find_ptr_default(head, key, NULL);
}
tern_node * tern_insert_ptr(tern_node * head, char * key, void * value)
{
tern_val val;
val.ptrval = value;
return tern_insert(head, key, val);
}
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