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#include <stddef.h>
#include <string.h>
#include "vec.h"
#include "alloc.h"
static LEO_Vec_Error LEO_Vec_grow(LEO_Vec *vec)
{
size_t new_capacity = vec->capacity
* LEO_Vec_GROWTH_FACTOR_NUMER
/ LEO_Vec_GROWTH_FACTOR_DENOM;
if (new_capacity <= vec->capacity)
return LEO_Vec_TOO_BIG;
vec->capacity = new_capacity;
vec->data = vec->allocator.realloc(vec->data,
vec->capacity * vec->item_size);
if (vec->data == NULL)
return LEO_Vec_ALLOCATION_FAILURE;
return LEO_Vec_OK;
}
LEO_Vec_Error LEO_Vec_init(LEO_Vec *vec, size_t item_size,
LEO_Allocator allocator)
{
if (vec == NULL)
return LEO_Vec_NULL_VEC_POINTER;
if (item_size == 0)
return LEO_Vec_INVALID_ITEM_SIZE;
vec->allocator = allocator;
vec->item_size = item_size;
vec->length = 0;
vec->capacity = LEO_Vec_DEFAULT_CAPACITY;
vec->data = vec->allocator.alloc(vec->capacity * vec->item_size);
if (!vec->data)
return LEO_Vec_ALLOCATION_FAILURE;
return LEO_Vec_OK;
}
void LEO_Vec_free(LEO_Vec *vec)
{
if (vec == NULL)
return;
vec->allocator.free(vec->data);
vec->data = NULL;
}
LEO_Vec_Error LEO_Vec_push(LEO_Vec *vec, const void *item)
{
if (vec == NULL)
return LEO_Vec_NULL_VEC_POINTER;
if (item == NULL)
return LEO_Vec_NULL_ITEM_POINTER;
if (vec->length >= vec->capacity) {
LEO_Vec_Error result = LEO_Vec_grow(vec);
if (result != LEO_Vec_OK)
return result;
}
unsigned char *dest = (unsigned char *)vec->data + (vec->length++) * vec->item_size;
memcpy(dest, item, vec->item_size);
return LEO_Vec_OK;
}
LEO_Vec_Error LEO_Vec_pop(LEO_Vec *vec, void *item)
{
if (vec == NULL)
return LEO_Vec_NULL_VEC_POINTER;
if (vec->length == 0)
return LEO_Vec_OUT_OF_BOUNDS;
void *src = vec->data + (vec->length--) * vec->item_size;
memcpy(item, src, vec->item_size);
return LEO_Vec_OK;
}
LEO_Vec_Error LEO_Vec_get(LEO_Vec *vec, size_t i, void *item)
{
if (vec == NULL)
return LEO_Vec_NULL_VEC_POINTER;
if (i >= vec->length)
return LEO_Vec_OUT_OF_BOUNDS;
unsigned char *src = (unsigned char *) vec->data + i * vec->item_size;
memcpy(item, src, vec->item_size);
return LEO_Vec_OK;
}
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