453 lines
12 KiB
C++
453 lines
12 KiB
C++
#define ARRAY_ALLOCATOR_TYPE Allocator
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#define ARRAY_ASSERT assert
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#define ARRAY_ALLOCATE(allocator, size) allocate_size(allocator, size)
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#define ARRAY_DEALLOCATE(allocator, p) deallocate(allocator, p)
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#include "core/array.hpp"
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//-----------------------------------------------------------------------------
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// Map
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//-----------------------------------------------------------------------------
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struct Map_Key_Value {
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int occupied;
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U64 key;
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void *value;
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};
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struct Map {
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Allocator *allocator;
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Map_Key_Value *data;
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S64 len;
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S64 cap;
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};
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CORE_Static void map_insert(Map *map, U64 key, void *val);
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CORE_Static void
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map_grow(Map *map, S64 new_size) {
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new_size = max((S64)16, new_size);
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assert(new_size > map->cap);
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assert(is_pow2(new_size));
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assert(map->allocator);
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Map new_map = {};
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new_map.data = allocate_array(map->allocator, Map_Key_Value, new_size);
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new_map.cap = new_size;
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new_map.allocator = map->allocator;
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for (S64 i = 0; i < map->cap; i++) {
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if (map->data[i].occupied) {
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map_insert(&new_map, map->data[i].key, map->data[i].value);
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}
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}
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if (map->data) deallocate(map->allocator, map->data);
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*map = new_map;
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}
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CORE_Static Map
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map_make(Allocator *a, S64 size) {
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Map result = {a};
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map_grow(&result, size);
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return result;
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}
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CORE_Static void
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map_insert(Map *map, U64 key, void *val) {
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assert(val);
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assert(key);
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// if(key == 0) key+=1;
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if ((2 * map->len) + 1 > map->cap) {
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map_grow(map, 2 * map->cap);
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}
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U64 hash = hash_u64(key);
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U64 index = wrap_around_pow2(hash, map->cap);
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U64 i = index;
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for (;;) {
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if (map->data[i].occupied == false) {
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map->len++;
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map->data[i].occupied = true;
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map->data[i].key = key;
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map->data[i].value = val;
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return;
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}
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else if (map->data[i].key == key) {
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map->data[i].value = val;
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return;
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}
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i = wrap_around_pow2(i + 1, map->cap);
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if (i == map->cap) {
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return;
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}
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}
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}
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CORE_Static Map_Key_Value *
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map_base_get(Map *map, U64 key) {
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if (map->len == 0) return 0;
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assert(key);
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U64 hash = hash_u64(key);
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U64 index = wrap_around_pow2(hash, map->cap);
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U64 i = index;
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for (;;) {
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if (map->data[i].key == key) {
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return map->data + i;
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}
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else if (map->data[i].key == 0) {
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return 0;
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}
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i = wrap_around_pow2(i + 1, map->cap);
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if (i == map->cap) {
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return 0;
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}
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}
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}
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CORE_Static void *
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map_get(Map *map, U64 key) {
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Map_Key_Value *result = map_base_get(map, key);
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if (result && result->occupied) return result->value;
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return 0;
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}
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CORE_Static void *
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map_remove(Map *map, U64 key) {
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Map_Key_Value *kv = map_base_get(map, key);
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if (kv) {
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kv->occupied = false;
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return kv->value;
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}
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return 0;
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}
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CORE_Static void *
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map_get(Map *map, void *pointer) {
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return map_get(map, (U64)pointer);
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}
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CORE_Static void *
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map_get(Map *map, Intern_String string) {
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return map_get(map, hash_string(string.s));
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}
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CORE_Static void
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map_insert(Map *map, void *key, void *value) {
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map_insert(map, (U64)key, value);
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}
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CORE_Static void
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map_insert(Map *map, Intern_String key, void *value) {
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map_insert(map, hash_string(key.s), value);
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}
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//-----------------------------------------------------------------------------
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// String intern
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//-----------------------------------------------------------------------------
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struct Intern_Table {
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Allocator *string_allocator;
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Map map;
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U8 *first_keyword;
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U8 *last_keyword;
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};
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CORE_Static Intern_Table
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intern_table_make(Allocator *string_allocator, Allocator *map_allocator, S64 initial_size = 32) {
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Intern_Table result = {};
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result.map = map_make(map_allocator, initial_size);
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result.string_allocator = string_allocator;
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return result;
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}
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CORE_Static Intern_String
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intern_string(Intern_Table *t, String string) {
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assert(t->string_allocator);
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U64 hash = hash_string(string);
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U8 *slot = (U8 *)map_get(&t->map, hash);
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if (slot) {
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// @todo: Is this a cast bug: *(slot-sizeof(S64))? slot is u8 so truncates?
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Intern_String result = {
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{slot, *(slot - sizeof(S64))}
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};
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return result;
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}
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S64 *len_address = (S64 *)allocate_size(t->string_allocator, string.len + 1 + sizeof(S64), false);
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*len_address = string.len;
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U8 *string_address = (U8 *)(len_address + 1);
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memory_copy(string_address, string.str, string.len);
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string_address[string.len] = 0;
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map_insert(&t->map, hash, string_address);
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Intern_String result = {
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{string_address, *len_address}
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};
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return result;
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}
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//-----------------------------------------------------------------------------
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// Array List
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//-----------------------------------------------------------------------------
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const int LIST_DEFAULT_BLOCK_SIZE = 16;
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const int LIST_DEFAULT_ALLOCATION_MUL = 2;
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template <class T>
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struct List_Node {
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List_Node<T> *next;
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List_Node<T> *prev;
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int cap;
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int len;
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T data[];
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};
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template <class T>
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struct List {
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int block_size = 0;
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int allocation_multiplier = 0;
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List_Node<T> *first = 0;
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List_Node<T> *last = 0;
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List_Node<T> *first_free = 0;
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struct Iter {
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T *item;
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List_Node<T> *node;
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int node_index;
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T &operator*() { return *item; }
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Iter &operator++() {
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if (node) {
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if (node_index + 1 >= node->len) {
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node = node->next;
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node_index = -1;
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item = 0;
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}
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if (node) {
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node_index += 1;
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item = node->data + node_index;
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}
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}
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return *this;
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}
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};
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Iter begin() {
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Iter result = {};
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result.node = first;
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result.node_index = -1;
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return ++result;
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}
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Iter end() { return {}; }
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friend bool operator!=(Iter &a, Iter &b) { return a.item != b.item; }
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};
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template <class T>
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List_Node<T> *list_allocate_node(Allocator *arena, int size) {
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auto node = (List_Node<T> *)allocate_size(arena, sizeof(List_Node<T>) + size * sizeof(T), false);
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node->cap = size;
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node->len = 0;
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node->next = 0;
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node->prev = 0;
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return node;
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}
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template <class T>
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void list_allocate_free_node(Allocator *arena, List<T> *list, int size) {
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List_Node<T> *node = list_allocate_node<T>(arena, size);
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DLL_STACK_ADD(list->first_free, node);
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}
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template <class T>
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void list_make_sure_there_is_room_for_item_count(Allocator *arena, List<T> *list, int item_count) {
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if (list->last == 0 || list->last->len + item_count > list->last->cap) {
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// Not enough space we need to get a new block
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List_Node<T> *node = 0;
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// Iterate the free list to check if we have a block of required size there
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For_Linked_List(list->first_free) {
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if (it->cap >= item_count) {
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DLL_STACK_REMOVE(list->first_free, it);
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node = it;
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node->len = 0;
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break;
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}
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}
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// We don't have a block on the free list need to allocate
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if (!node) {
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// Set default values if not initialized
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if (!list->allocation_multiplier) list->allocation_multiplier = LIST_DEFAULT_ALLOCATION_MUL;
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if (!list->block_size) list->block_size = LIST_DEFAULT_BLOCK_SIZE;
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if (item_count > list->block_size)
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list->block_size = item_count * 2;
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node = list_allocate_node<T>(arena, list->block_size);
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list->block_size *= list->allocation_multiplier;
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}
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assert(node);
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DLL_QUEUE_ADD_LAST(list->first, list->last, node);
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}
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}
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template <class T>
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T *list_get(List<T> *list, int index, List_Node<T> **node = 0, int *in_block_index = 0) {
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if (list) {
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int i = 0;
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For_Linked_List(list->first) {
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int lookup_i = index - i;
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if (lookup_i < it->len) {
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if (node) *node = it;
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if (in_block_index) *in_block_index = lookup_i;
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return it->data + lookup_i;
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}
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i += it->len;
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}
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}
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return 0;
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}
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template <class T>
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T *getp(List<T> *list, int index) {
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return list_get(list, index);
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}
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template <class T>
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T get(List<T> *list, int index) {
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return *list_get(list, index);
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}
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template <class T>
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void add(Allocator *arena, List<T> *list, T item) {
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list_make_sure_there_is_room_for_item_count(arena, list, 1);
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list->last->data[list->last->len++] = item;
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}
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template <class T>
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T *add_size(Allocator *arena, List<T> *list, int count = 1, int zero_memory = 0) {
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list_make_sure_there_is_room_for_item_count(arena, list, count);
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T *result = list->last->data + list->last->len;
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list->last->len += count;
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if (zero_memory) {
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memory_zero(result, sizeof(T) * count);
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}
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return result;
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}
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template <class T>
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void list_free_node(List<T> *list, List_Node<T> *node) {
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#if 1
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// Make sure it's actually in list list
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bool found = false;
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For_Linked_List(list->first) {
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if (it == node) {
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found = true;
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break;
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}
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}
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assert(found);
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#endif
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DLL_QUEUE_REMOVE(list->first, list->last, node);
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DLL_STACK_ADD(list->first_free, node);
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}
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template <class T>
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int length(List<T> *list) {
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int result = 0;
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For_Linked_List(list->first) {
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result += it->len;
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}
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return result;
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}
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template <class T>
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void free_all_nodes(List<T> *list) {
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if (list->first == 0) return;
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assert(!list->last->next);
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assert(!list->first->prev);
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list->last->next = list->first_free;
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if (list->first_free) list->first_free->prev = list->last;
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list->first_free = list->first;
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list->last = list->first = 0;
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}
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template <class T>
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T ordered_remove(List<T> *list, int index) {
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List_Node<T> *node;
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int in_block_index;
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T *data = list_get(list, index, &node, &in_block_index);
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assert_message(data, "Trying to unordered_remove element that's outside of the List");
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if (!data)
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return {};
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T result = *data;
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// Check if we need to deallocate the block
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if (node->len == 1) {
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list_free_node(list, node);
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return result;
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}
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// We need to move part of the block to fill the new empty spot
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int right_count = (--node->len) - in_block_index;
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memory_copy(data, data + 1, sizeof(T) * right_count);
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return result;
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}
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template <class T>
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T unordered_remove(List<T> *list, int index) {
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List_Node<T> *node;
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T *data = list_get(list, index, &node);
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assert_message(data, "Trying to unordered_remove element that's outside of the List");
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if (!data)
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return {};
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assert(node->len);
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assert(node->cap);
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// Swap
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T result = *data;
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*data = node->data[node->len - 1];
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node->len -= 1;
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if (node->len == 0) {
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list_free_node(list, node);
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}
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return result;
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}
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template <class T>
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T pop(List<T> *list) {
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assert(list->last != 0);
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assert(list->last->len > 0);
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T result = list->last->data[--list->last->len];
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if (list->last->len == 0) {
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list_free_node(list, list->last);
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}
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return result;
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}
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template <class T>
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T *merge(Allocator *arena, List<T> *list) {
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int len = length(list);
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T *result = allocate_size(arena, T, len, false);
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int i = 0;
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For_Linked_List(list->first) {
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memory_copy(result + i, it->data, it->len * sizeof(T));
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i += it->len;
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}
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return result;
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}
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