1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "fdopen_stream.h"
17
18 #include "../../common/napi/n_class.h"
19 #include "../../common/napi/n_func_arg.h"
20 #include "../../common/uni_error.h"
21
22 #include "../class_stream/stream_entity.h"
23 #include "../class_stream/stream_n_exporter.h"
24
25 namespace OHOS {
26 namespace DistributedFS {
27 namespace ModuleFileIO {
28 using namespace std;
29
InstantiateStream(napi_env env,unique_ptr<FILE,decltype(& fclose) > fp)30 static NVal InstantiateStream(napi_env env, unique_ptr<FILE, decltype(&fclose)> fp)
31 {
32 napi_value objStream = NClass::InstantiateClass(env, StreamNExporter::className_, {});
33 if (!objStream) {
34 UniError(EIO).ThrowErr(env, "INNER BUG. Cannot instantiate stream");
35 return NVal();
36 }
37
38 auto streamEntity = NClass::GetEntityOf<StreamEntity>(env, objStream);
39 if (!streamEntity) {
40 UniError(EIO).ThrowErr(env, "Cannot instantiate stream because of void entity");
41 return NVal();
42 }
43
44 streamEntity->fp.swap(fp);
45 return {env, objStream};
46 }
47
Sync(napi_env env,napi_callback_info info)48 napi_value FdopenStream::Sync(napi_env env, napi_callback_info info)
49 {
50 NFuncArg funcArg(env, info);
51
52 if (!funcArg.InitArgs(NARG_CNT::TWO)) {
53 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
54 return nullptr;
55 }
56
57 bool succ = false;
58
59 int fd;
60 tie(succ, fd) = NVal(env, funcArg[NARG_POS::FIRST]).ToInt32();
61 if (!succ) {
62 UniError(EINVAL).ThrowErr(env, "Arg fd is required to be type integer");
63 return nullptr;
64 }
65
66 unique_ptr<char[]> mode;
67 tie(succ, mode, ignore) = NVal(env, funcArg[NARG_POS::SECOND]).ToUTF8String();
68 if (!succ) {
69 UniError(EINVAL).ThrowErr(env, "Arg mode is required to be type string");
70 return nullptr;
71 }
72
73 unique_ptr<FILE, decltype(&fclose)> fp = {fdopen(fd, mode.get()), fclose};
74 if (!fp) {
75 UniError(errno).ThrowErr(env);
76 return nullptr;
77 }
78
79 return InstantiateStream(env, move(fp)).val_;
80 }
81 } // namespace ModuleFileIO
82 } // namespace DistributedFS
83 } // namespace OHOS