function sub(x, offset, len) {
  var result = new Array(len);
  var j = 0;
  var i = offset;
  while(j < len) {
    result[j] = x[i];
    j = j + 1 | 0;
    i = i + 1 | 0;
  };
  return result;
}

function len(_acc, _l) {
  while(true) {
    var l = _l;
    var acc = _acc;
    if (!l) {
      return acc;
    }
    _l = l.tl;
    _acc = l.hd.length + acc | 0;
    continue ;
  };
}

function fill(arr, _i, _l) {
  while(true) {
    var l = _l;
    var i = _i;
    if (!l) {
      return ;
    }
    var x = l.hd;
    var l$1 = x.length;
    var k = i;
    var j = 0;
    while(j < l$1) {
      arr[k] = x[j];
      k = k + 1 | 0;
      j = j + 1 | 0;
    };
    _l = l.tl;
    _i = k;
    continue ;
  };
}

function concat(l) {
  var v = len(0, l);
  var result = new Array(v);
  fill(result, 0, l);
  return result;
}

function set(xs, index, newval) {
  if (index < 0 || index >= xs.length) {
    throw {
          RE_EXN_ID: "Invalid_argument",
          _1: "index out of bounds",
          Error: new Error()
        };
  }
  xs[index] = newval;
}

function get(xs, index) {
  if (index < 0 || index >= xs.length) {
    throw {
          RE_EXN_ID: "Invalid_argument",
          _1: "index out of bounds",
          Error: new Error()
        };
  }
  return xs[index];
}

function make(len, init) {
  var b = new Array(len);
  for(var i = 0; i < len; ++i){
    b[i] = init;
  }
  return b;
}

function make_float(len) {
  var b = new Array(len);
  for(var i = 0; i < len; ++i){
    b[i] = 0;
  }
  return b;
}

function blit(a1, i1, a2, i2, len) {
  if (i2 <= i1) {
    for(var j = 0; j < len; ++j){
      a2[j + i2 | 0] = a1[j + i1 | 0];
    }
    return ;
  }
  for(var j$1 = len - 1 | 0; j$1 >= 0; --j$1){
    a2[j$1 + i2 | 0] = a1[j$1 + i1 | 0];
  }
}

function dup(prim) {
  return prim.slice(0);
}

export {
  dup ,
  sub ,
  concat ,
  make ,
  make_float ,
  blit ,
  get ,
  set ,
}
/* No side effect */