Method: Snow::Mat4Array#resize!

Defined in:

ext/snow-math/snow-math.c

#resize!(sm_new_length) ⇒ Object

Resizes the array to new_length and returns self.

If resizing to a length smaller than the previous length, excess array elements are discarded and the array is truncated. Otherwise, when resizing the array to a greater length than previous, new elements in the array will contain garbage values.

If new_length is equal to self.length, the call does nothing to the array.

Attempting to resize an array to a new length of zero or less will raise a RangeError. Do not try to resize arrays to zero or less. Do not be that person.

call-seq:

resize!(new_length) -> self

# File 'ext/snow-math/snow-math.c', line 1391

static VALUE sm_mat4_array_resize(VALUE sm_self, VALUE sm_new_length)
{
  size_t new_length;
  size_t old_length;

  rb_check_frozen(sm_self);

  old_length = NUM2SIZET(sm_mathtype_array_length(sm_self));
  new_length = NUM2SIZET(sm_new_length);

  if (old_length == new_length) {
    /* No change, done */
    return sm_self;
  } else if (new_length < 1) {
    /* Someone decided to be that person. */
    rb_raise(rb_eRangeError,
      "Cannot resize array to length less than or equal to 0.");
    return sm_self;
  }

  REALLOC_N(RDATA(sm_self)->data, mat4_t, new_length);
  rb_ivar_set(sm_self, kRB_IVAR_MATHARRAY_LENGTH, sm_new_length);
  rb_ary_clear(rb_ivar_get(sm_self, kRB_IVAR_MATHARRAY_CACHE));

  return sm_self;
}