1 /*
2 * Copyright (c) 2023 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 "ecmascript/base/path_helper.h"
16
17 namespace panda::ecmascript::base {
18 /*
19 * Before: ./xxx/../xxx/xxx/
20 * After: xxx/xxx
21 */
NormalizePath(const CString & fileName)22 CString PathHelper::NormalizePath(const CString &fileName)
23 {
24 if (fileName.find(DOUBLE_SLASH_TAG) == CString::npos &&
25 fileName.find(CURRENT_DIREATORY_TAG) == CString::npos &&
26 fileName[fileName.size() - 1] != SLASH_TAG) {
27 return fileName;
28 }
29 CString res = "";
30 size_t prev = 0;
31 size_t curr = fileName.find(SLASH_TAG);
32 CVector<CString> elems;
33 // eliminate parent directory path
34 while (curr != CString::npos) {
35 if (curr > prev) {
36 CString elem = fileName.substr(prev, curr - prev);
37 if (elem == DOUBLE_POINT_TAG && !elems.empty()) { // looking for xxx/../
38 elems.pop_back();
39 } else if (elem != POINT_STRING_TAG && elem != DOUBLE_POINT_TAG) { // remove ./ ../
40 elems.push_back(elem);
41 }
42 }
43 prev = curr + 1;
44 curr = fileName.find(SLASH_TAG, prev);
45 }
46 if (prev != fileName.size()) {
47 elems.push_back(fileName.substr(prev));
48 }
49 for (auto e : elems) {
50 if (res.size() == 0 && fileName.at(0) != SLASH_TAG) {
51 res.append(e);
52 continue;
53 }
54 res.append(1, SLASH_TAG).append(e);
55 }
56 return res;
57 }
58
59 /*
60 * Before: xxx/xxx
61 * After: xxx/
62 */
ResolveDirPath(JSThread * thread,CString fileName)63 JSHandle<EcmaString> PathHelper::ResolveDirPath(JSThread *thread, CString fileName)
64 {
65 ObjectFactory *factory = thread->GetEcmaVM()->GetFactory();
66 // find last '/', '\\'
67 int foundPos = static_cast<int>(fileName.find_last_of("/\\"));
68 if (foundPos == -1) {
69 return factory->NewFromUtf8("");
70 }
71 CString dirPathStr = fileName.substr(0, foundPos + 1);
72 return factory->NewFromUtf8(dirPathStr);
73 }
74 } // namespace panda::ecmascript::base