Adam Lesinski | 16c4d15 | 2014-01-24 13:27:13 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | // |
| 18 | // Access a chunk of the asset hierarchy as if it were a single directory. |
| 19 | // |
| 20 | #ifndef __LIBS_ASSETDIR_H |
| 21 | #define __LIBS_ASSETDIR_H |
| 22 | |
| 23 | #include <androidfw/misc.h> |
| 24 | #include <utils/String8.h> |
| 25 | #include <utils/Vector.h> |
| 26 | #include <utils/SortedVector.h> |
| 27 | #include <sys/types.h> |
| 28 | |
| 29 | namespace android { |
| 30 | |
| 31 | /* |
| 32 | * This provides vector-style access to a directory. We do this rather |
| 33 | * than modeling opendir/readdir access because it's simpler and the |
| 34 | * nature of the operation requires us to have all data on hand anyway. |
| 35 | * |
| 36 | * The list of files will be sorted in ascending order by ASCII value. |
| 37 | * |
| 38 | * The contents are populated by our friend, the AssetManager. |
| 39 | */ |
| 40 | class AssetDir { |
| 41 | public: |
| 42 | AssetDir(void) |
| 43 | : mFileInfo(NULL) |
| 44 | {} |
| 45 | virtual ~AssetDir(void) { |
| 46 | delete mFileInfo; |
| 47 | } |
| 48 | |
| 49 | /* |
| 50 | * Vector-style access. |
| 51 | */ |
| 52 | size_t getFileCount(void) { return mFileInfo->size(); } |
| 53 | const String8& getFileName(int idx) { |
| 54 | return mFileInfo->itemAt(idx).getFileName(); |
| 55 | } |
| 56 | const String8& getSourceName(int idx) { |
| 57 | return mFileInfo->itemAt(idx).getSourceName(); |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Get the type of a file (usually regular or directory). |
| 62 | */ |
| 63 | FileType getFileType(int idx) { |
| 64 | return mFileInfo->itemAt(idx).getFileType(); |
| 65 | } |
| 66 | |
| 67 | private: |
| 68 | /* these operations are not implemented */ |
| 69 | AssetDir(const AssetDir& src); |
| 70 | const AssetDir& operator=(const AssetDir& src); |
| 71 | |
| 72 | friend class AssetManager; |
| 73 | |
| 74 | /* |
| 75 | * This holds information about files in the asset hierarchy. |
| 76 | */ |
| 77 | class FileInfo { |
| 78 | public: |
| 79 | FileInfo(void) {} |
| 80 | FileInfo(const String8& path) // useful for e.g. svect.indexOf |
| 81 | : mFileName(path), mFileType(kFileTypeUnknown) |
| 82 | {} |
| 83 | ~FileInfo(void) {} |
| 84 | FileInfo(const FileInfo& src) { |
| 85 | copyMembers(src); |
| 86 | } |
| 87 | const FileInfo& operator= (const FileInfo& src) { |
| 88 | if (this != &src) |
| 89 | copyMembers(src); |
| 90 | return *this; |
| 91 | } |
| 92 | |
| 93 | void copyMembers(const FileInfo& src) { |
| 94 | mFileName = src.mFileName; |
| 95 | mFileType = src.mFileType; |
| 96 | mSourceName = src.mSourceName; |
| 97 | } |
| 98 | |
| 99 | /* need this for SortedVector; must compare only on file name */ |
| 100 | bool operator< (const FileInfo& rhs) const { |
| 101 | return mFileName < rhs.mFileName; |
| 102 | } |
| 103 | |
| 104 | /* used by AssetManager */ |
| 105 | bool operator== (const FileInfo& rhs) const { |
| 106 | return mFileName == rhs.mFileName; |
| 107 | } |
| 108 | |
| 109 | void set(const String8& path, FileType type) { |
| 110 | mFileName = path; |
| 111 | mFileType = type; |
| 112 | } |
| 113 | |
| 114 | const String8& getFileName(void) const { return mFileName; } |
| 115 | void setFileName(const String8& path) { mFileName = path; } |
| 116 | |
| 117 | FileType getFileType(void) const { return mFileType; } |
| 118 | void setFileType(FileType type) { mFileType = type; } |
| 119 | |
| 120 | const String8& getSourceName(void) const { return mSourceName; } |
| 121 | void setSourceName(const String8& path) { mSourceName = path; } |
| 122 | |
| 123 | /* |
| 124 | * Handy utility for finding an entry in a sorted vector of FileInfo. |
| 125 | * Returns the index of the matching entry, or -1 if none found. |
| 126 | */ |
| 127 | static int findEntry(const SortedVector<FileInfo>* pVector, |
| 128 | const String8& fileName); |
| 129 | |
| 130 | private: |
| 131 | String8 mFileName; // filename only |
| 132 | FileType mFileType; // regular, directory, etc |
| 133 | |
| 134 | String8 mSourceName; // currently debug-only |
| 135 | }; |
| 136 | |
| 137 | /* AssetManager uses this to initialize us */ |
| 138 | void setFileList(SortedVector<FileInfo>* list) { mFileInfo = list; } |
| 139 | |
| 140 | SortedVector<FileInfo>* mFileInfo; |
| 141 | }; |
| 142 | |
| 143 | }; // namespace android |
| 144 | |
| 145 | #endif // __LIBS_ASSETDIR_H |