#include "standards.h"
#include <string.h>
#include <errno.h>

#include "vec.h"

type_status vec_cutn(size_t typesize, vec_type* v, size_t i, void* d,
                     size_t n) {
  size_t it=i*typesize, nt=n*typesize, nit=it+nt;
  if (it/typesize!=i || nt/typesize!=n || nit<it || nit>v->len)
    return (errno=EINVAL, -1);
  if (d!=NULL) memcpy(d, v->s+it, nt);
  memmove(v->s+it, v->s+nit, v->len-nit);
  v->len-=nt;
  return 0;
}