| % Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| % use this file except in compliance with the License. You may obtain a copy of |
| % the License at |
| % |
| % http://www.apache.org/licenses/LICENSE-2.0 |
| % |
| % Unless required by applicable law or agreed to in writing, software |
| % distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| % WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| % License for the specific language governing permissions and limitations under |
| % the License. |
| |
| -module(b64url). |
| -on_load(init/0). |
| |
| -export([ |
| encode/1, |
| decode/1 |
| ]). |
| |
| % Internal sanity checks |
| -export([ |
| check_tables/0 |
| ]). |
| |
| -define(NOT_LOADED, not_loaded(?LINE)). |
| |
| -spec encode(iodata()) -> binary(). |
| encode(IoData) -> |
| case encode_init(IoData) of |
| {ok, Bin} -> |
| Bin; |
| {partial, St} -> |
| encode_loop(IoData, St) |
| end. |
| |
| -spec decode(iodata()) -> binary() | {error, any()}. |
| decode(IoData) -> |
| case decode_init(IoData) of |
| {ok, Bin} -> |
| Bin; |
| {error, _} = Ret -> |
| Ret; |
| {partial, St} -> |
| decode_loop(IoData, St) |
| end. |
| |
| -spec check_tables() -> ok | {error, non_neg_integer()}. |
| check_tables() -> |
| ?NOT_LOADED. |
| |
| init() -> |
| PrivDir = |
| case code:priv_dir(?MODULE) of |
| {error, _} -> |
| EbinDir = filename:dirname(code:which(?MODULE)), |
| AppPath = filename:dirname(EbinDir), |
| filename:join(AppPath, "priv"); |
| Path -> |
| Path |
| end, |
| erlang:load_nif(filename:join(PrivDir, "b64url"), 0). |
| |
| encode_loop(IoData, St) -> |
| case encode_cont(IoData, St) of |
| {ok, Bin} -> |
| Bin; |
| {partial, St} -> |
| encode_loop(IoData, St) |
| end. |
| |
| decode_loop(IoData, St) -> |
| case decode_cont(IoData, St) of |
| {ok, Bin} -> |
| Bin; |
| {error, _} = Ret -> |
| Ret; |
| {partial, St} -> |
| decode_loop(IoData, St) |
| end. |
| |
| encode_init(_) -> ?NOT_LOADED. |
| encode_cont(_, _) -> ?NOT_LOADED. |
| decode_init(_) -> ?NOT_LOADED. |
| decode_cont(_, _) -> ?NOT_LOADED. |
| |
| not_loaded(Line) -> |
| erlang:nif_error({not_loaded, [{module, ?MODULE}, {line, Line}]}). |