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#include "dynamic_array.h"
#include <assert.h>
#include <string.h>
void kit_da_init(kit_da_void_t *array, ptrdiff_t element_size,
ptrdiff_t size, kit_allocator_t alloc) {
assert(array != NULL);
assert(element_size > 0);
assert(size >= 0);
assert(alloc.allocate != NULL);
assert(alloc.deallocate != NULL);
memset(array, 0, sizeof(kit_da_void_t));
if (size > 0)
array->values = alloc.allocate(alloc.state, element_size * size);
if (array->values != NULL) {
array->capacity = size;
array->size = size;
}
array->alloc = alloc;
}
static ptrdiff_t eval_capacity(ptrdiff_t current_cap,
ptrdiff_t required_cap) {
if (current_cap == 0)
return required_cap;
ptrdiff_t cap = current_cap;
while (cap < required_cap) cap *= 2;
return cap;
}
void kit_da_resize(kit_da_void_t *array, ptrdiff_t element_size,
ptrdiff_t size) {
assert(array != NULL);
assert(element_size > 0);
assert(size >= 0);
if (size <= array->capacity) {
array->size = size;
} else {
ptrdiff_t capacity = eval_capacity(array->capacity, size);
assert(array->alloc.allocate != NULL);
assert(array->alloc.deallocate != NULL);
void *bytes = array->alloc.allocate(array->alloc.state,
element_size * capacity);
if (bytes != NULL) {
if (array->size > 0)
memcpy(bytes, array->values, element_size * array->size);
if (array->values != NULL)
array->alloc.deallocate(array->alloc.state, array->values);
array->capacity = capacity;
array->size = size;
array->values = bytes;
}
}
}
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