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%% Copyright (c) 2023 Peter Morgan <peter.james.morgan@gmail.com> |
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%% |
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%% Licensed under the Apache License, Version 2.0 (the "License"); |
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%% you may not use this file except in compliance with the License. |
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%% You may obtain a copy of the License at |
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%% |
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%% http://www.apache.org/licenses/LICENSE-2.0 |
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%% |
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%% Unless required by applicable law or agreed to in writing, software |
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%% distributed under the License is distributed on an "AS IS" BASIS, |
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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%% See the License for the specific language governing permissions and |
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%% limitations under the License. |
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%% @doc Encoder combinators that write numbers into big or little |
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%% endian bytes. |
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-module(narcs_number). |
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-export([f/2]). |
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-export([i/2]). |
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-export([u/2]). |
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-export_type([endian/0]). |
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-type endian() :: big | little. |
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-spec i(endian(), pos_integer()) -> narcs:encoder(integer(), binary()). |
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%% @doc Write a signed integer into a little or big endian bits. |
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:-( |
i(Endianess, Size) -> int(Endianess, signed, Size). |
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-spec u(endian(), pos_integer()) -> narcs:encoder(non_neg_integer(), binary()). |
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%% @doc Write a unsigned integer into a little or big endian bits. |
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u(Endianess, Size) -> int(Endianess, unsigned, Size). |
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int(little, signed, Size) -> |
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:-( |
fun |
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(Input) -> |
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:-( |
<<Input:Size/little-signed>> |
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end; |
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int(little, unsigned, Size) -> |
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:-( |
fun |
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(Input) -> |
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<<Input:Size/little>> |
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end; |
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int(big, signed, Size) -> |
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:-( |
fun |
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(Input) -> |
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<<Input:Size/signed>> |
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end; |
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int(big, unsigned, Size) -> |
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fun |
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(Input) -> |
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<<Input:Size>> |
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end. |
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-spec f(endian(), pos_integer()) -> narcs:encoder(float(), binary()). |
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%% @doc Write a float into a little or big endian bits. |
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f(little, Size) -> |
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:-( |
fun |
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(Input) -> |
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:-( |
<<Input:Size/float-little>> |
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end; |
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f(big, Size) -> |
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:-( |
fun |
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(Input) -> |
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<<Input:Size/float>> |
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end. |