146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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// Access a chunk of the asset hierarchy as if it were a single directory.
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//
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#ifndef __LIBS_ASSETDIR_H
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#define __LIBS_ASSETDIR_H
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#include <utils/String8.h>
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#include <utils/Vector.h>
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#include <utils/SortedVector.h>
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#include <utils/misc.h>
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#include <sys/types.h>
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namespace android {
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/*
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* This provides vector-style access to a directory. We do this rather
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* than modeling opendir/readdir access because it's simpler and the
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* nature of the operation requires us to have all data on hand anyway.
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*
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* The list of files will be sorted in ascending order by ASCII value.
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*
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* The contents are populated by our friend, the AssetManager.
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*/
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class AssetDir {
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public:
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AssetDir(void)
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: mFileInfo(NULL)
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{}
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virtual ~AssetDir(void) {
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delete mFileInfo;
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}
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/*
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* Vector-style access.
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*/
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size_t getFileCount(void) { return mFileInfo->size(); }
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const String8& getFileName(int idx) {
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return mFileInfo->itemAt(idx).getFileName();
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}
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const String8& getSourceName(int idx) {
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return mFileInfo->itemAt(idx).getSourceName();
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}
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/*
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* Get the type of a file (usually regular or directory).
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*/
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FileType getFileType(int idx) {
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return mFileInfo->itemAt(idx).getFileType();
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}
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private:
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/* these operations are not implemented */
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AssetDir(const AssetDir& src);
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const AssetDir& operator=(const AssetDir& src);
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friend class AssetManager;
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/*
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* This holds information about files in the asset hierarchy.
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*/
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class FileInfo {
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public:
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FileInfo(void) {}
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FileInfo(const String8& path) // useful for e.g. svect.indexOf
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: mFileName(path), mFileType(kFileTypeUnknown)
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{}
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~FileInfo(void) {}
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FileInfo(const FileInfo& src) {
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copyMembers(src);
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}
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const FileInfo& operator= (const FileInfo& src) {
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if (this != &src)
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copyMembers(src);
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return *this;
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}
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void copyMembers(const FileInfo& src) {
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mFileName = src.mFileName;
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mFileType = src.mFileType;
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mSourceName = src.mSourceName;
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}
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/* need this for SortedVector; must compare only on file name */
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bool operator< (const FileInfo& rhs) const {
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return mFileName < rhs.mFileName;
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}
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/* used by AssetManager */
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bool operator== (const FileInfo& rhs) const {
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return mFileName == rhs.mFileName;
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}
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void set(const String8& path, FileType type) {
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mFileName = path;
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mFileType = type;
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}
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const String8& getFileName(void) const { return mFileName; }
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void setFileName(const String8& path) { mFileName = path; }
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FileType getFileType(void) const { return mFileType; }
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void setFileType(FileType type) { mFileType = type; }
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const String8& getSourceName(void) const { return mSourceName; }
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void setSourceName(const String8& path) { mSourceName = path; }
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/*
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* Handy utility for finding an entry in a sorted vector of FileInfo.
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* Returns the index of the matching entry, or -1 if none found.
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*/
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static int findEntry(const SortedVector<FileInfo>* pVector,
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const String8& fileName);
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private:
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String8 mFileName; // filename only
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FileType mFileType; // regular, directory, etc
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String8 mSourceName; // currently debug-only
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};
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/* AssetManager uses this to initialize us */
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void setFileList(SortedVector<FileInfo>* list) { mFileInfo = list; }
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SortedVector<FileInfo>* mFileInfo;
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};
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}; // namespace android
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#endif // __LIBS_ASSETDIR_H
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