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#include <string.h>
#include "wv_vec.h"
void wv_vec_init(struct wv_vec *v, size_t unit_size)
{
v->data = NULL;
v->len = 0;
v->cap = 0;
v->unit_size = unit_size;
}
void wv_vec_push(struct wv_vec *v, const void *item)
{
if (v->len >= v->cap) {
v->cap = (v->cap == 0) ? 8 : v->cap * 2;
v->data = realloc(v->data, v->cap * v->unit_size);
}
void *target = (char *)v->data + (v->len * v->unit_size);
memcpy(target, item, v->unit_size);
v->len++;
}
void *wv_vec_pop(struct wv_vec *v)
{
if (v->len == 0)
return NULL;
v->len--;
return (char *)v->data + (v->len * v->unit_size);
}
void *wv_vec_last(struct wv_vec *v)
{
if (v->len == 0)
return NULL;
return (char *)v->data + ((v->len - 1) * v->unit_size);
}
void wv_vec_free(struct wv_vec *v)
{
free(v->data);
v->data = NULL;
v->len = v->cap = 0;
}
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