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#include "dynamic_array.h"
#include <assert.h>
void kit_da_init(kit_da_void_t *array, i64 element_size, i64 size,
kit_allocator_t *alloc) {
assert(array != NULL);
assert(element_size > 0);
assert(size >= 0);
memset(array, 0, sizeof(kit_da_void_t));
if (size > 0)
array->values = kit_alloc_dispatch(alloc, KIT_ALLOCATE,
element_size * size, 0, NULL);
if (array->values != NULL) {
array->capacity = size;
array->size = size;
}
array->alloc = alloc;
}
static i64 eval_capacity(i64 current_cap, i64 required_cap) {
if (current_cap == 0)
return required_cap;
i64 cap = current_cap;
while (cap < required_cap) cap *= 2;
return cap;
}
void kit_da_resize(kit_da_void_t *array, i64 element_size, i64 size) {
assert(array != NULL);
assert(element_size > 0);
assert(size >= 0);
if (size <= array->capacity) {
array->size = size;
} else {
i64 capacity = eval_capacity(array->capacity, size);
void *bytes = kit_alloc_dispatch(
array->alloc, KIT_ALLOCATE, element_size * capacity, 0, NULL);
if (bytes != NULL) {
if (array->size > 0)
memcpy(bytes, array->values, element_size * array->size);
if (array->values != NULL)
kit_alloc_dispatch(array->alloc, KIT_DEALLOCATE, 0, 0,
array->values);
array->capacity = capacity;
array->size = size;
array->values = bytes;
}
}
}
void kit_da_resize_exact(kit_da_void_t *array, i64 element_size,
i64 capacity) {
assert(array != NULL);
assert(element_size > 0);
assert(capacity >= 0);
void *bytes = capacity <= 0
? NULL
: kit_alloc_dispatch(array->alloc, KIT_ALLOCATE,
element_size * capacity, 0,
NULL);
if (bytes != NULL || capacity == 0) {
if (array->size > 0 && capacity > 0)
memcpy(bytes, array->values, element_size * array->size);
if (array->values != NULL)
kit_alloc_dispatch(array->alloc, KIT_DEALLOCATE, 0, 0,
array->values);
array->capacity = capacity;
array->size = capacity;
array->values = bytes;
}
}
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