Binary examples generated from tools/dsl/decls.json.
shift/1 copies the payload and adds 1 to each byte, wrapping at 255.
borrow_len/1 reads the size of the caller's binary and does not copy it.
The byte function lives in native/examples/bytes_user.mojo.
Summary
Functions
Returns the byte size of bin without copying the payload.
Loads priv/native/libdsl_bytes.so.
Returns a copy of bin with each byte increased by 1, modulo 256.
Functions
@spec borrow_len(binary()) :: {:ok, non_neg_integer()} | {:error, :not_binary}
Returns the byte size of bin without copying the payload.
Returns
{:ok, size}{:error, :not_binary}for a list or a bitstring that is not a binary
Examples
iex> Mojoler.Dsl.Bytes.borrow_len(<<1, 2, 3, 4>>)
{:ok, 4}
iex> Mojoler.Dsl.Bytes.borrow_len(<<1::7>>)
{:error, :not_binary}@spec load_nif() :: :ok | {:error, term()}
Loads priv/native/libdsl_bytes.so.
A second call returns {:error, {:reload, charlist}}.
Examples
iex> Mojoler.Dsl.Bytes.load_nif()
{:error, {:reload, ~c"NIF library already loaded (reload disallowed since OTP 20)."}}@spec shift(binary()) :: {:ok, binary(), non_neg_integer()} | {:error, :not_binary}
Returns a copy of bin with each byte increased by 1, modulo 256.
bin must be a binary. A bitstring that is not a binary is an error.
Returns
{:ok, shifted, nbytes}wherenbytesis the byte size{:error, :not_binary}
Examples
iex> Mojoler.Dsl.Bytes.shift(<<1, 2, 255>>)
{:ok, <<2, 3, 0>>, 3}
iex> Mojoler.Dsl.Bytes.shift(<<>>)
{:ok, <<>>, 0}
iex> Mojoler.Dsl.Bytes.shift([1, 2])
{:error, :not_binary}