diff -r 92e482410453 -r d345541018fa src/map.c --- a/src/map.c Mon Dec 30 09:54:10 2019 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,402 +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 -#include - -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 const *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 const *map, copy_func fnc, void *data) { - return ucx_map_clone_a(ucx_default_allocator(), map, fnc, data); -} - -UcxMap *ucx_map_clone_a(UcxAllocator *allocator, - UcxMap const *map, copy_func fnc, void *data) { - size_t bs = (map->count * 5) >> 1; - UcxMap *newmap = ucx_map_new_a(allocator, 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 const *map, UcxKey key) { - return ucx_map_get_and_remove((UcxMap *)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 const *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; -} - -UcxMap* ucx_map_union(const UcxMap *first, const UcxMap *second, - copy_func cpfnc, void* cpdata) { - return ucx_map_union_a(ucx_default_allocator(), - first, second, cpfnc, cpdata); -} - -UcxMap* ucx_map_union_a(UcxAllocator *allocator, - const UcxMap *first, const UcxMap *second, - copy_func cpfnc, void* cpdata) { - UcxMap* result = ucx_map_clone_a(allocator, first, cpfnc, cpdata); - ucx_map_copy(second, result, cpfnc, cpdata); - return result; -} - -UcxMap* ucx_map_intersection(const UcxMap *first, const UcxMap *second, - copy_func cpfnc, void* cpdata) { - return ucx_map_intersection_a(ucx_default_allocator(), - first, second, cpfnc, cpdata); -} - -UcxMap* ucx_map_intersection_a(UcxAllocator *allocator, - const UcxMap *first, const UcxMap *second, - copy_func cpfnc, void* cpdata) { - UcxMap *result = ucx_map_new_a(allocator, first->size < second->size ? - first->size : second->size); - - UcxMapIterator iter = ucx_map_iterator(first); - void* value; - UCX_MAP_FOREACH(key, value, iter) { - if (ucx_map_get(second, key)) { - ucx_map_put(result, key, cpfnc ? cpfnc(value, cpdata) : value); - } - } - - return result; -} - -UcxMap* ucx_map_difference(const UcxMap *first, const UcxMap *second, - copy_func cpfnc, void* cpdata) { - return ucx_map_difference_a(ucx_default_allocator(), - first, second, cpfnc, cpdata); -} - -UcxMap* ucx_map_difference_a(UcxAllocator *allocator, - const UcxMap *first, const UcxMap *second, - copy_func cpfnc, void* cpdata) { - - UcxMap *result = ucx_map_new_a(allocator, first->size - second->count); - - UcxMapIterator iter = ucx_map_iterator(first); - void* value; - UCX_MAP_FOREACH(key, value, iter) { - if (!ucx_map_get(second, key)) { - ucx_map_put(result, key, cpfnc ? cpfnc(value, cpdata) : value); - } - } - - ucx_map_rehash(result); - return result; -} \ No newline at end of file