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 #include "lstat.h"
16
17 #include <memory>
18 #include <tuple>
19
20 #include "../../common/napi/n_async/n_async_work_callback.h"
21 #include "../../common/napi/n_async/n_async_work_promise.h"
22 #include "../../common/napi/n_class.h"
23 #include "../../common/napi/n_func_arg.h"
24 #include "../../common/napi/n_val.h"
25 #include "../../common/uni_error.h"
26
27 #include "../class_stat/stat_entity.h"
28 #include "../class_stat/stat_n_exporter.h"
29
30 namespace OHOS {
31 namespace DistributedFS {
32 namespace ModuleFileIO {
33 using namespace std;
34
Sync(napi_env env,napi_callback_info info)35 napi_value Lstat::Sync(napi_env env, napi_callback_info info)
36 {
37 NFuncArg funcArg(env, info);
38 if (!funcArg.InitArgs(NARG_CNT::ONE)) {
39 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
40 return nullptr;
41 }
42
43 bool succ = false;
44 unique_ptr<char[]> pathPtr;
45 tie(succ, pathPtr, ignore) = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8String();
46 if (!succ) {
47 UniError(EINVAL).ThrowErr(env, "The first argument requires type string");
48 return nullptr;
49 }
50
51 struct stat buf;
52 int ret = lstat(pathPtr.get(), &buf);
53 if (ret == -1) {
54 UniError(errno).ThrowErr(env);
55 return nullptr;
56 }
57
58 napi_value objStat = NClass::InstantiateClass(env, StatNExporter::className_, {});
59 if (!objStat) {
60 return nullptr;
61 }
62
63 auto statEntity = NClass::GetEntityOf<StatEntity>(env, objStat);
64 if (!statEntity) {
65 return nullptr;
66 }
67
68 statEntity->stat_ = buf;
69 return objStat;
70 }
71
72 struct AsyncStatArg {
73 struct stat stat_;
74 };
75
Async(napi_env env,napi_callback_info info)76 napi_value Lstat::Async(napi_env env, napi_callback_info info)
77 {
78 NFuncArg funcArg(env, info);
79 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::TWO)) {
80 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
81 return nullptr;
82 }
83 string path;
84 unique_ptr<char[]> tmp;
85 bool succ = false;
86 tie(succ, tmp, ignore) = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8String();
87 if (!succ) {
88 UniError(EINVAL).ThrowErr(env, "Invalid path");
89 return nullptr;
90 }
91 path = tmp.get();
92
93 auto arg = make_shared<AsyncStatArg>();
94 auto cbExec = [arg, path](napi_env env) -> UniError {
95 if (lstat(path.c_str(), &arg->stat_)) {
96 return UniError(errno);
97 } else {
98 return UniError(ERRNO_NOERR);
99 }
100 };
101 auto cbCompl = [arg](napi_env env, UniError err) -> NVal {
102 if (err) {
103 return { env, err.GetNapiErr(env) };
104 }
105 napi_value objStat = NClass::InstantiateClass(env, StatNExporter::className_, {});
106 if (!objStat) {
107 return { env, UniError(EIO).GetNapiErr(env) };
108 }
109 auto statEntity = NClass::GetEntityOf<StatEntity>(env, objStat);
110 if (!statEntity) {
111 return { env, UniError(EIO).GetNapiErr(env) };
112 }
113 statEntity->stat_ = arg->stat_;
114 return { env, objStat };
115 };
116 NVal thisVar(env, funcArg.GetThisVar());
117 string procedureName = "fileIOLstat";
118 if (funcArg.GetArgc() == NARG_CNT::ONE) {
119 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbCompl).val_;
120 } else {
121 NVal cb(env, funcArg[NARG_POS::SECOND]);
122 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbCompl).val_;
123 }
124 }
125 } // namespace ModuleFileIO
126 } // namespace DistributedFS
127 } // namespace OHOS