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Add table tests

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This commit is contained in:
Krzosa Karol
2023-12-31 16:41:02 +01:00
parent b3f5ce3772
commit 0a81270278
6 changed files with 87 additions and 19 deletions
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28
table.hpp
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@@ -57,6 +57,7 @@ TABLE_PRIVATE_FUNCTION uint64_t TABLE__HashBytes(void *data, unsigned size) {
#endif
#define TABLE__WRAP_AROUND_POWER_OF_2(x, pow2) (((x) & ((pow2)-1llu)))
#define TABLE__IS_POW2(x) (((x) & ((x)-1)) == 0)
TABLE_PRIVATE_FUNCTION int TABLE_CStringLen(char *str) {
int i = 0;
@@ -79,11 +80,24 @@ struct Table {
size_t len, cap;
Entry *values;
static const size_t max_load_factor = 80;
static const size_t min_load_factor = 50;
static const size_t significant_distance = 8;
// load factor calculation was rearranged
// to get rid of division:
//> 100 * len / cap = load_factor
//> len * 100 = load_factor * cap
inline bool reached_load_factor(size_t lfactor) {
return (len + 1) * 100 >= lfactor * cap;
}
inline bool is_empty(Entry *entry) { return entry->hash == 0; }
inline bool is_occupied(Entry *entry) { return entry->hash != 0; }
void reserve(size_t size) {
TABLE_ASSERT(size > cap && "New size is smaller then original size");
TABLE_ASSERT(TABLE__IS_POW2(size));
TABLE_SET_DEFAULT_ALLOCATOR;
Entry *old_values = values;
@@ -132,14 +146,6 @@ struct Table {
TABLE_ASSERT(!"Invalid codepath");
}
// load factor calculation was rearranged
// to get rid of division:
//> 100 * len / cap = load_factor
//> len * 100 = load_factor * cap
inline bool reached_load_factor(size_t lfactor) {
return (len + 1) * 100 >= lfactor * cap;
}
void insert(uint64_t key, const Value &value) {
if (reached_load_factor(max_load_factor)) {
if (cap == 0) cap = 16; // 32 cause cap*2
@@ -189,6 +195,7 @@ struct Table {
Entry *entry = get_table_entry(key);
entry->hash = 0;
entry->distance = 0;
len -= 1;
}
Value *get(uint64_t key) {
@@ -218,12 +225,9 @@ struct Table {
}
void dealloc() {
COR_DEALLOCATE(allocator, values);
TABLE_DEALLOCATE(allocator, values);
len = 0;
cap = 0;
values = 0;
}
static const size_t max_load_factor = 80;
static const size_t min_load_factor = 50;
static const size_t significant_distance = 8;
};