1 /*
2 * Copyright (c) 2021-2022 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 "truncate.h"
17
18 #include <cstring>
19 #include <tuple>
20 #include <unistd.h>
21
22 namespace OHOS {
23 namespace DistributedFS {
24 namespace ModuleFileIO {
25 using namespace std;
26
Sync(napi_env env,napi_callback_info info)27 napi_value Truncate::Sync(napi_env env, napi_callback_info info)
28 {
29 NFuncArg funcArg(env, info);
30 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::TWO)) {
31 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
32 return nullptr;
33 }
34
35 auto [resGetFirstArg, path, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8String();
36 if (!resGetFirstArg) {
37 UniError(EINVAL).ThrowErr(env, "Invalid path");
38 return nullptr;
39 }
40
41 int ret = -1;
42 if (funcArg.GetArgc() == NARG_CNT::ONE) {
43 ret = truncate(path.get(), 0);
44 } else {
45 auto [resGetSecondArg, len] = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32();
46 if (!resGetSecondArg) {
47 UniError(EINVAL).ThrowErr(env, "Invalid len");
48 }
49 ret = truncate(path.get(), len);
50 }
51
52 if (ret == -1) {
53 UniError(errno).ThrowErr(env);
54 return nullptr;
55 }
56
57 return NVal::CreateUndefined(env).val_;
58 }
59
Async(napi_env env,napi_callback_info info)60 napi_value Truncate::Async(napi_env env, napi_callback_info info)
61 {
62 NFuncArg funcArg(env, info);
63 if (!funcArg.InitArgs(NARG_CNT::ONE, NARG_CNT::THREE)) {
64 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
65 return nullptr;
66 }
67
68 auto [resGetFirstArg, path, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8String();
69 if (!resGetFirstArg) {
70 UniError(EINVAL).ThrowErr(env, "Invalid path");
71 return nullptr;
72 }
73
74 int len = 0;
75 size_t argc = funcArg.GetArgc();
76 if (argc > NARG_CNT::ONE) {
77 auto [resGetSecondArg, length] = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32();
78 if (!resGetSecondArg) {
79 UniError(EINVAL).ThrowErr(env, "Invalid len");
80 return nullptr;
81 }
82 len = length;
83 }
84
85 auto cbExec = [path = string(path.get()), len](napi_env env) -> UniError {
86 int ret = truncate(path.c_str(), len);
87 if (ret == -1) {
88 return UniError(errno);
89 } else {
90 return UniError(ERRNO_NOERR);
91 }
92 };
93
94 auto cbCompl = [](napi_env env, UniError err) -> NVal {
95 if (err) {
96 return { env, err.GetNapiErr(env) };
97 } else {
98 return NVal::CreateUndefined(env);
99 }
100 };
101
102 NVal thisVar(env, funcArg.GetThisVar());
103 const string procedureName = "FileIOTruncate";
104 if (argc == NARG_CNT::ONE || (argc == NARG_CNT::TWO && NVal(env, funcArg[NARG_POS::SECOND]).TypeIs(napi_number))) {
105 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbCompl).val_;
106 } else {
107 NVal cb(env, funcArg[NARG_POS::THIRD]);
108 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbCompl).val_;
109 }
110 }
111 } // namespace ModuleFileIO
112 } // namespace DistributedFS
113 } // namespace OHOS
114