lib: Move hashtable from lib to unicast

The hashtable is only used for forwarding tables in the unicast
IPCP. This moves the generic hashtable out of the library into the
unicast IPCP to prepare a more tailored implementation specific to
routing tables containing address lists.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

4 files changed, 0 insertions, 352 deletions

diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 8dbedcff..c5be9946 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -202,7 +202,6 @@ set(SOURCE_FILES_COMMON
   btree.c
   crc32.c
   hash.c
-  hashtable.c
   list.c
   lockfile.c
   logs.c
diff --git a/src/lib/hashtable.c b/src/lib/hashtable.c
deleted file mode 100644
index ffff1d73..00000000
--- a/src/lib/hashtable.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2020
- *
- * Hash table with separate chaining on collisions
- *
- *    Dimitri Staessens <dimitri.staessens@ugent.be>
- *    Sander Vrijders   <sander.vrijders@ugent.be>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * version 2.1 as published by the Free Software Foundation.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#if defined(__linux__) || defined(__CYGWIN__)
-#define _DEFAULT_SOURCE
-#endif
-
-#include <ouroboros/hashtable.h>
-#include <ouroboros/list.h>
-#include <ouroboros/errno.h>
-#include <ouroboros/hash.h>
-
-#include <assert.h>
-#include <string.h>
-
-struct htable_entry {
-        struct list_head next;
-        uint64_t         key;
-        void *           val;
-        size_t           len;
-};
-
-struct htable {
-        struct list_head * buckets;
-        bool               hash_key;
-        uint64_t           buckets_size;
-};
-
-struct htable * htable_create(uint64_t buckets,
-                              bool     hash_key)
-{
-        struct htable * tmp;
-        unsigned int i;
-
-        if (buckets == 0)
-                return NULL;
-
-        buckets--;
-        buckets |= buckets >> 1;
-        buckets |= buckets >> 2;
-        buckets |= buckets >> 4;
-        buckets |= buckets >> 8;
-        buckets |= buckets >> 16;
-        buckets |= buckets >> 32;
-        buckets++;
-
-        tmp = malloc(sizeof(*tmp));
-        if (tmp == NULL)
-                return NULL;
-
-        tmp->hash_key = hash_key;
-        tmp->buckets_size = buckets;
-
-        tmp->buckets = malloc(buckets * sizeof(*tmp->buckets));
-        if (tmp->buckets == NULL) {
-                free(tmp);
-                return NULL;
-        }
-
-        for (i = 0; i < buckets; i++)
-                list_head_init(&(tmp->buckets[i]));
-
-        return tmp;
-}
-
-void htable_destroy(struct htable * table)
-{
-        assert(table);
-        assert(table->buckets);
-
-        htable_flush(table);
-        free(table->buckets);
-        free(table);
-}
-
-void htable_flush(struct htable * table)
-{
-        unsigned int          i;
-        struct list_head *    pos = NULL;
-        struct list_head *    n = NULL;
-        struct htable_entry * entry;
-
-        assert(table);
-
-        for (i = 0; i < table->buckets_size; i++) {
-                list_for_each_safe(pos, n, &(table->buckets[i])) {
-                        entry = list_entry(pos, struct htable_entry, next);
-                        list_del(&entry->next);
-                        free(entry->val);
-                        free(entry);
-                }
-        }
-}
-
-static uint64_t hash(uint64_t key)
-{
-        void *   res;
-        uint64_t ret;
-        uint8_t  keys[4];
-
-        memcpy(keys, &key, 4);
-
-        mem_hash(HASH_MD5, &res, keys, 4);
-
-        ret = (* (uint64_t *) res);
-
-        free(res);
-
-        return ret;
-}
-
-static uint64_t calc_key(struct htable * table,
-                         uint64_t        key)
-{
-        if (table->hash_key)
-                key = hash(key);
-
-        return (key & (table->buckets_size - 1));
-}
-
-int htable_insert(struct htable * table,
-                  uint64_t        key,
-                  void *          val,
-                  size_t          len)
-{
-        struct htable_entry * entry;
-        uint64_t              lookup_key;
-        struct list_head *    pos = NULL;
-
-        assert(table);
-
-        lookup_key = calc_key(table, key);
-
-        list_for_each(pos, &(table->buckets[lookup_key])) {
-                entry = list_entry(pos, struct htable_entry, next);
-                if (entry->key == key)
-                        return -1;
-        }
-
-        entry = malloc(sizeof(*entry));
-        if (entry == NULL)
-                return -ENOMEM;
-
-        entry->key = key;
-        entry->val = val;
-        entry->len = len;
-        list_head_init(&entry->next);
-
-        list_add(&entry->next, &(table->buckets[lookup_key]));
-
-        return 0;
-}
-
-int htable_lookup(struct htable * table,
-                  uint64_t        key,
-                  void **         val,
-                  size_t *        len)
-{
-        struct htable_entry * entry;
-        struct list_head *    pos = NULL;
-        uint64_t              lookup_key;
-
-        assert(table);
-
-        lookup_key = calc_key(table, key);
-
-        list_for_each(pos, &(table->buckets[lookup_key])) {
-                entry = list_entry(pos, struct htable_entry, next);
-                if (entry->key == key) {
-                        *val = entry->val;
-                        *len = entry->len;
-                        return 0;
-                }
-        }
-
-        return -1;
-}
-
-int htable_delete(struct htable * table,
-                  uint64_t        key)
-{
-        struct htable_entry * entry;
-        uint64_t              lookup_key;
-        struct list_head *    pos = NULL;
-        struct list_head *    n = NULL;
-
-        assert(table);
-
-        lookup_key = calc_key(table, key);
-
-        list_for_each_safe(pos, n, &(table->buckets[lookup_key])) {
-                entry = list_entry(pos, struct htable_entry, next);
-                if (entry->key == key) {
-                        list_del(&entry->next);
-                        free(entry->val);
-                        free(entry);
-                        return 0;
-                }
-        }
-
-        return -1;
-}
diff --git a/src/lib/tests/CMakeLists.txt b/src/lib/tests/CMakeLists.txt
index c887626a..9e23b0ee 100644
--- a/src/lib/tests/CMakeLists.txt
+++ b/src/lib/tests/CMakeLists.txt
@@ -6,7 +6,6 @@ create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
   bitmap_test.c
   btree_test.c
   crc32_test.c
-  hashtable_test.c
   md5_test.c
   sha3_test.c
   shm_rbuff_test.c
diff --git a/src/lib/tests/hashtable_test.c b/src/lib/tests/hashtable_test.c
deleted file mode 100644
index f84fee63..00000000
--- a/src/lib/tests/hashtable_test.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2020
- *
- * Test of the hash table
- *
- *    Dimitri Staessens <dimitri.staessens@ugent.be>
- *    Sander Vrijders   <sander.vrijders@ugent.be>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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 this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#include "hashtable.c"
-
-#include <stdio.h>
-
-#define HASHTABLE_SIZE 256
-#define INT_TEST 4
-
-int hashtable_test(int argc, char ** argv)
-{
-        struct htable * table;
-        int             i;
-        int *           j;
-        void *          el;
-        size_t          len;
-
-        (void) argc;
-        (void) argv;
-
-        table = htable_create(HASHTABLE_SIZE, true);
-        if (table == NULL) {
-                printf("Failed to create.\n");
-                return -1;
-        }
-
-        htable_destroy(table);
-
-        table = htable_create(HASHTABLE_SIZE, false);
-        if (table == NULL) {
-                printf("Failed to create.\n");
-                return -1;
-        }
-
-        for (i = 0; i < HASHTABLE_SIZE + INT_TEST + 2; i++) {
-                j = malloc(sizeof(*j));
-                if (j == NULL) {
-                        printf("Failed to malloc.\n");
-                        htable_destroy(table);
-                        return -1;
-                }
-                *j = i;
-
-                if (htable_insert(table, i, (void *) j, 1)) {
-                        printf("Failed to insert.\n");
-                        htable_destroy(table);
-                        free(j);
-                        return -1;
-                }
-        }
-
-        if (htable_lookup(table, INT_TEST, &el, &len)) {
-                printf("Failed to lookup.\n");
-                htable_destroy(table);
-                return -1;
-        }
-
-        j = (int *) el;
-        if (*j != INT_TEST) {
-                printf("Lookup returned wrong value (%d != %d).\n",
-                       INT_TEST, *j);
-                htable_destroy(table);
-                return -1;
-        }
-
-        if (htable_lookup(table, HASHTABLE_SIZE + INT_TEST, &el, &len)) {
-                printf("Failed to lookup.\n");
-                htable_destroy(table);
-                return -1;
-        }
-
-        j = (int *) el;
-        if (*j != HASHTABLE_SIZE + INT_TEST) {
-                printf("Lookup returned wrong value (%d != %d).\n",
-                       INT_TEST, *j);
-                htable_destroy(table);
-                return -1;
-        }
-
-        if (htable_delete(table, INT_TEST)) {
-                printf("Failed to delete.\n");
-                htable_destroy(table);
-                return -1;
-        }
-
-        if (htable_lookup(table, INT_TEST, &el, &len) == 0) {
-                printf("Failed to delete properly.\n");
-                htable_destroy(table);
-                return -1;
-        }
-
-        if (htable_lookup(table, HASHTABLE_SIZE + INT_TEST, &el, &len)) {
-                printf("Failed to lookup after deletion.\n");
-                htable_destroy(table);
-                return -1;
-        }
-
-        j = (int *) el;
-        if (*j != HASHTABLE_SIZE + INT_TEST) {
-                printf("Lookup returned wrong value (%d != %d).\n",
-                       INT_TEST, *j);
-                htable_destroy(table);
-                return -1;
-        }
-
-        htable_destroy(table);
-
-        return 0;
-}