mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-08-31 09:45:24 +02:00
Henrik Rydgård
e806192154
If there's demand for this feature, we'll bring it back and put it behind a developer option. Fixes vuln #7 from the recent collection
116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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// TODO: Remove the Windows-specific code, FILE is fine there too.
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#include <map>
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#include "Common/File/Path.h"
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#include "Core/FileSystems/FileSystem.h"
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#include "Core/FileSystems/DirectoryFileSystem.h"
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extern const std::string INDEX_FILENAME;
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class VirtualDiscFileSystem: public IFileSystem {
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public:
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VirtualDiscFileSystem(IHandleAllocator *_hAlloc, const Path &_basePath);
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~VirtualDiscFileSystem();
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void DoState(PointerWrap &p) override;
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int OpenFile(std::string filename, FileAccess access, const char *devicename = nullptr) override;
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size_t SeekFile(u32 handle, s32 position, FileMove type) override;
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size_t ReadFile(u32 handle, u8 *pointer, s64 size) override;
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size_t ReadFile(u32 handle, u8 *pointer, s64 size, int &usec) override;
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void CloseFile(u32 handle) override;
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PSPFileInfo GetFileInfo(std::string filename) override;
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PSPFileInfo GetFileInfoByHandle(u32 handle) override;
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bool OwnsHandle(u32 handle) override;
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int Ioctl(u32 handle, u32 cmd, u32 indataPtr, u32 inlen, u32 outdataPtr, u32 outlen, int &usec) override;
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PSPDevType DevType(u32 handle) override;
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std::vector<PSPFileInfo> GetDirListing(std::string_view path, bool *exists = nullptr) override;
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FileSystemFlags Flags() const override { return FileSystemFlags::UMD; }
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u64 FreeDiskSpace(const std::string &path) override { return 0; }
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// unsupported operations
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size_t WriteFile(u32 handle, const u8 *pointer, s64 size) override;
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size_t WriteFile(u32 handle, const u8 *pointer, s64 size, int &usec) override;
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bool MkDir(const std::string &dirname) override;
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bool RmDir(const std::string &dirname) override;
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int RenameFile(const std::string &from, const std::string &to) override;
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bool RemoveFile(const std::string &filename) override;
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bool ComputeRecursiveDirSizeIfFast(const std::string &path, int64_t *size) override { return false; }
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void Describe(char *buf, size_t size) const override { snprintf(buf, size, "VirtualDisc: %s", basePath.ToVisualString().c_str()); } // TODO: Ask the fileLoader about the origins
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private:
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void LoadFileListIndex();
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// Warning: modifies input string.
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int getFileListIndex(std::string &fileName);
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int getFileListIndex(u32 accessBlock, u32 accessSize, bool blockMode = false) const;
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Path GetLocalPath(std::string_view localpath) const;
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typedef enum { VFILETYPE_NORMAL, VFILETYPE_LBN, VFILETYPE_ISO } VirtualFileType;
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struct OpenFileEntry {
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OpenFileEntry() {}
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OpenFileEntry(FileSystemFlags fileSystemFlags) {
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hFile = DirectoryFileHandle(DirectoryFileHandle::SKIP_REPLAY, fileSystemFlags);
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}
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DirectoryFileHandle hFile;
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VirtualFileType type = VFILETYPE_NORMAL;
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u32 fileIndex = 0;
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u64 curOffset = 0;
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u64 startOffset = 0; // only used by lbn files
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u64 size = 0; // only used by lbn files
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bool Open(const Path &basePath, std::string& fileName, FileAccess access) {
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// Ignored, we're read only.
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u32 err;
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return hFile.Open(basePath, fileName, access, err);
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}
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size_t Read(u8 *data, s64 size) {
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return hFile.Read(data, size);
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}
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size_t Seek(s32 position, FileMove type) {
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return hFile.Seek(position, type);
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}
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void Close() {
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return hFile.Close();
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}
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};
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typedef std::map<u32, OpenFileEntry> EntryMap;
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EntryMap entries;
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IHandleAllocator *hAlloc;
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Path basePath;
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struct FileListEntry {
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std::string fileName;
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u32 firstBlock;
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u32 totalSize;
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};
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std::vector<FileListEntry> fileList;
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u32 currentBlockIndex;
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u32 lastReadBlock_;
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};
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