--- a/ucx/map.c Sun Apr 16 14:12:24 2023 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,337 +0,0 @@
-/*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "ucx/map.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-UcxMap *ucx_map_new(size_t size) {
- return ucx_map_new_a(NULL, size);
-}
-
-UcxMap *ucx_map_new_a(UcxAllocator *allocator, size_t size) {
- if(size == 0) {
- size = 16;
- }
-
- if(!allocator) {
- allocator = ucx_default_allocator();
- }
-
- UcxMap *map = (UcxMap*)almalloc(allocator, sizeof(UcxMap));
- if (!map) {
- return NULL;
- }
-
- map->allocator = allocator;
- map->map = (UcxMapElement**)alcalloc(
- allocator, size, sizeof(UcxMapElement*));
- if(map->map == NULL) {
- alfree(allocator, map);
- return NULL;
- }
- map->size = size;
- map->count = 0;
-
- return map;
-}
-
-static void ucx_map_free_elmlist_contents(UcxMap *map) {
- for (size_t n = 0 ; n < map->size ; n++) {
- UcxMapElement *elem = map->map[n];
- if (elem != NULL) {
- do {
- UcxMapElement *next = elem->next;
- alfree(map->allocator, elem->key.data);
- alfree(map->allocator, elem);
- elem = next;
- } while (elem != NULL);
- }
- }
-}
-
-void ucx_map_free(UcxMap *map) {
- ucx_map_free_elmlist_contents(map);
- alfree(map->allocator, map->map);
- alfree(map->allocator, map);
-}
-
-void ucx_map_free_content(UcxMap *map, ucx_destructor destr) {
- UcxMapIterator iter = ucx_map_iterator(map);
- void *val;
- UCX_MAP_FOREACH(key, val, iter) {
- if (destr) {
- destr(val);
- } else {
- alfree(map->allocator, val);
- }
- }
-}
-
-void ucx_map_clear(UcxMap *map) {
- if (map->count == 0) {
- return; // nothing to do
- }
- ucx_map_free_elmlist_contents(map);
- memset(map->map, 0, map->size*sizeof(UcxMapElement*));
- map->count = 0;
-}
-
-int ucx_map_copy(UcxMap *from, UcxMap *to, copy_func fnc, void *data) {
- UcxMapIterator i = ucx_map_iterator(from);
- void *value;
- UCX_MAP_FOREACH(key, value, i) {
- if (ucx_map_put(to, key, fnc ? fnc(value, data) : value)) {
- return 1;
- }
- }
- return 0;
-}
-
-UcxMap *ucx_map_clone(UcxMap *map, copy_func fnc, void *data) {
- size_t bs = (map->count * 5) >> 1;
- UcxMap *newmap = ucx_map_new(bs > map->size ? bs : map->size);
- if (!newmap) {
- return NULL;
- }
- ucx_map_copy(map, newmap, fnc, data);
- return newmap;
-}
-
-int ucx_map_rehash(UcxMap *map) {
- size_t load = (map->size * 3) >> 2;
- if (map->count > load) {
- UcxMap oldmap;
- oldmap.map = map->map;
- oldmap.size = map->size;
- oldmap.count = map->count;
- oldmap.allocator = map->allocator;
-
- map->size = (map->count * 5) >> 1;
- map->map = (UcxMapElement**)alcalloc(
- map->allocator, map->size, sizeof(UcxMapElement*));
- if (!map->map) {
- *map = oldmap;
- return 1;
- }
- map->count = 0;
- ucx_map_copy(&oldmap, map, NULL, NULL);
-
- /* free the UcxMapElement list of oldmap */
- ucx_map_free_elmlist_contents(&oldmap);
- alfree(map->allocator, oldmap.map);
- }
- return 0;
-}
-
-int ucx_map_put(UcxMap *map, UcxKey key, void *data) {
- UcxAllocator *allocator = map->allocator;
-
- if (key.hash == 0) {
- key.hash = ucx_hash((const char*)key.data, key.len);
- }
-
- struct UcxMapKey mapkey;
- mapkey.hash = key.hash;
-
- size_t slot = mapkey.hash%map->size;
- UcxMapElement *elm = map->map[slot];
- UcxMapElement *prev = NULL;
-
- while (elm && elm->key.hash < mapkey.hash) {
- prev = elm;
- elm = elm->next;
- }
-
- if (!elm || elm->key.hash != mapkey.hash) {
- UcxMapElement *e = (UcxMapElement*)almalloc(
- allocator, sizeof(UcxMapElement));
- if (!e) {
- return -1;
- }
- e->key.data = NULL;
- if (prev) {
- prev->next = e;
- } else {
- map->map[slot] = e;
- }
- e->next = elm;
- elm = e;
- }
-
- if (!elm->key.data) {
- void *kd = almalloc(allocator, key.len);
- if (!kd) {
- return -1;
- }
- memcpy(kd, key.data, key.len);
- mapkey.data = kd;
- mapkey.len = key.len;
- elm->key = mapkey;
- map->count++;
- }
- elm->data = data;
-
- return 0;
-}
-
-static void* ucx_map_get_and_remove(UcxMap *map, UcxKey key, int remove) {
- if(key.hash == 0) {
- key.hash = ucx_hash((const char*)key.data, key.len);
- }
-
- size_t slot = key.hash%map->size;
- UcxMapElement *elm = map->map[slot];
- UcxMapElement *pelm = NULL;
- while (elm && elm->key.hash <= key.hash) {
- if(elm->key.hash == key.hash) {
- int n = (key.len > elm->key.len) ? elm->key.len : key.len;
- if (memcmp(elm->key.data, key.data, n) == 0) {
- void *data = elm->data;
- if (remove) {
- if (pelm) {
- pelm->next = elm->next;
- } else {
- map->map[slot] = elm->next;
- }
- alfree(map->allocator, elm->key.data);
- alfree(map->allocator, elm);
- map->count--;
- }
-
- return data;
- }
- }
- pelm = elm;
- elm = pelm->next;
- }
-
- return NULL;
-}
-
-void *ucx_map_get(UcxMap *map, UcxKey key) {
- return ucx_map_get_and_remove(map, key, 0);
-}
-
-void *ucx_map_remove(UcxMap *map, UcxKey key) {
- return ucx_map_get_and_remove(map, key, 1);
-}
-
-UcxKey ucx_key(const void *data, size_t len) {
- UcxKey key;
- key.data = data;
- key.len = len;
- key.hash = ucx_hash((const char*)data, len);
- return key;
-}
-
-
-int ucx_hash(const char *data, size_t len) {
- /* murmur hash 2 */
-
- int m = 0x5bd1e995;
- int r = 24;
-
- int h = 25 ^ len;
-
- int i = 0;
- while (len >= 4) {
- int k = data[i + 0] & 0xFF;
- k |= (data[i + 1] & 0xFF) << 8;
- k |= (data[i + 2] & 0xFF) << 16;
- k |= (data[i + 3] & 0xFF) << 24;
-
- k *= m;
- k ^= k >> r;
- k *= m;
-
- h *= m;
- h ^= k;
-
- i += 4;
- len -= 4;
- }
-
- switch (len) {
- case 3: h ^= (data[i + 2] & 0xFF) << 16;
- /* no break */
- case 2: h ^= (data[i + 1] & 0xFF) << 8;
- /* no break */
- case 1: h ^= (data[i + 0] & 0xFF); h *= m;
- /* no break */
- }
-
- h ^= h >> 13;
- h *= m;
- h ^= h >> 15;
-
- return h;
-}
-
-UcxMapIterator ucx_map_iterator(UcxMap *map) {
- UcxMapIterator i;
- i.map = map;
- i.cur = NULL;
- i.index = 0;
- return i;
-}
-
-int ucx_map_iter_next(UcxMapIterator *i, UcxKey *key, void **elm) {
- UcxMapElement *e = i->cur;
-
- if (e) {
- e = e->next;
- } else {
- e = i->map->map[0];
- }
-
- while (i->index < i->map->size) {
- if (e) {
- if (e->data) {
- i->cur = e;
- *elm = e->data;
- key->data = e->key.data;
- key->hash = e->key.hash;
- key->len = e->key.len;
- return 1;
- }
-
- e = e->next;
- } else {
- i->index++;
-
- if (i->index < i->map->size) {
- e = i->map->map[i->index];
- }
- }
- }
-
- return 0;
-}
-