ShizZy
12 years ago
4 changed files with 637 additions and 0 deletions
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2src/core/core.vcxproj
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6src/core/core.vcxproj.filters
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520src/core/src/file_sys/meta_file_system.cpp
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109src/core/src/file_sys/meta_file_system.h
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// 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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#include <set>
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#include <algorithm>
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#include "string_util.h"
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#include "file_sys/meta_file_system.h"
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//#include "Core/HLE/sceKernelThread.h"
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//#include "Core/Reporting.h"
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static bool ApplyPathStringToComponentsVector(std::vector<std::string> &vector, const std::string &pathString) |
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{ |
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size_t len = pathString.length(); |
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size_t start = 0; |
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while (start < len) |
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{ |
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size_t i = pathString.find('/', start); |
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if (i == std::string::npos) |
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i = len; |
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if (i > start) |
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{ |
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std::string component = pathString.substr(start, i - start); |
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if (component != ".") |
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{ |
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if (component == "..") |
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{ |
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if (vector.size() != 0) |
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{ |
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vector.pop_back(); |
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} |
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else |
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{ |
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// The PSP silently ignores attempts to .. to parent of root directory
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WARN_LOG(FILESYS, "RealPath: ignoring .. beyond root - root directory is its own parent: \"%s\"", pathString.c_str()); |
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} |
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} |
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else |
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{ |
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vector.push_back(component); |
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} |
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} |
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} |
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start = i + 1; |
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} |
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return true; |
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} |
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/*
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* Changes relative paths to absolute, removes ".", "..", and trailing "/" |
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* "drive:./blah" is absolute (ignore the dot) and "/blah" is relative (because it's missing "drive:") |
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* babel (and possibly other games) use "/directoryThatDoesNotExist/../directoryThatExists/filename" |
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*/ |
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static bool RealPath(const std::string ¤tDirectory, const std::string &inPath, std::string &outPath) |
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{ |
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size_t inLen = inPath.length(); |
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if (inLen == 0) |
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{ |
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WARN_LOG(FILESYS, "RealPath: inPath is empty"); |
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outPath = currentDirectory; |
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return true; |
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} |
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size_t inColon = inPath.find(':'); |
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if (inColon + 1 == inLen) |
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{ |
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// There's nothing after the colon, e.g. umd0: - this is perfectly valid.
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outPath = inPath; |
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return true; |
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} |
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bool relative = (inColon == std::string::npos); |
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std::string prefix, inAfterColon; |
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std::vector<std::string> cmpnts; // path components
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size_t outPathCapacityGuess = inPath.length(); |
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if (relative) |
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{ |
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size_t curDirLen = currentDirectory.length(); |
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if (curDirLen == 0) |
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{ |
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ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory is empty", inPath.c_str()); |
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return false; |
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} |
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size_t curDirColon = currentDirectory.find(':'); |
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if (curDirColon == std::string::npos) |
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{ |
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ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" has no prefix", inPath.c_str(), currentDirectory.c_str()); |
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return false; |
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} |
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if (curDirColon + 1 == curDirLen) |
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{ |
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ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" is all prefix and no path. Using \"/\" as path for current directory.", inPath.c_str(), currentDirectory.c_str()); |
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} |
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else |
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{ |
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const std::string curDirAfter = currentDirectory.substr(curDirColon + 1); |
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if (! ApplyPathStringToComponentsVector(cmpnts, curDirAfter) ) |
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{ |
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ERROR_LOG(FILESYS,"RealPath: currentDirectory is not a valid path: \"%s\"", currentDirectory.c_str()); |
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return false; |
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} |
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outPathCapacityGuess += curDirLen; |
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} |
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prefix = currentDirectory.substr(0, curDirColon + 1); |
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inAfterColon = inPath; |
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} |
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else |
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{ |
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prefix = inPath.substr(0, inColon + 1); |
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inAfterColon = inPath.substr(inColon + 1); |
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} |
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// Special case: "disc0:" is different from "disc0:/", so keep track of the single slash.
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if (inAfterColon == "/") |
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{ |
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outPath = prefix + inAfterColon; |
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return true; |
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} |
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if (! ApplyPathStringToComponentsVector(cmpnts, inAfterColon) ) |
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{ |
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WARN_LOG(FILESYS, "RealPath: inPath is not a valid path: \"%s\"", inPath.c_str()); |
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return false; |
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} |
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outPath.clear(); |
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outPath.reserve(outPathCapacityGuess); |
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outPath.append(prefix); |
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size_t numCmpnts = cmpnts.size(); |
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for (size_t i = 0; i < numCmpnts; i++) |
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{ |
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outPath.append(1, '/'); |
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outPath.append(cmpnts[i]); |
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} |
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return true; |
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} |
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IFileSystem *MetaFileSystem::GetHandleOwner(u32 handle) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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for (size_t i = 0; i < fileSystems.size(); i++) |
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{ |
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if (fileSystems[i].system->OwnsHandle(handle)) |
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return fileSystems[i].system; //got it!
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} |
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//none found?
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return 0; |
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} |
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bool MetaFileSystem::MapFilePath(const std::string &_inpath, std::string &outpath, MountPoint **system) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string realpath; |
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// Special handling: host0:command.txt (as seen in Super Monkey Ball Adventures, for example)
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// appears to mean the current directory on the UMD. Let's just assume the current directory.
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std::string inpath = _inpath; |
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if (strncasecmp(inpath.c_str(), "host0:", strlen("host0:")) == 0) { |
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INFO_LOG(FILESYS, "Host0 path detected, stripping: %s", inpath.c_str()); |
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inpath = inpath.substr(strlen("host0:")); |
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} |
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const std::string *currentDirectory = &startingDirectory; |
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_assert_msg_(FILESYS, false, "must implement equiv of __KernelGetCurThread"); |
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int currentThread = 0;//__KernelGetCurThread();
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currentDir_t::iterator it = currentDir.find(currentThread); |
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if (it == currentDir.end()) |
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{ |
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//Attempt to emulate SCE_KERNEL_ERROR_NOCWD / 8002032C: may break things requiring fixes elsewhere
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if (inpath.find(':') == std::string::npos /* means path is relative */) |
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{ |
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lastOpenError = -1;//SCE_KERNEL_ERROR_NOCWD;
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WARN_LOG(FILESYS, "Path is relative, but current directory not set for thread %i. returning 8002032C(SCE_KERNEL_ERROR_NOCWD) instead.", currentThread); |
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} |
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} |
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else |
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{ |
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currentDirectory = &(it->second); |
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} |
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if ( RealPath(*currentDirectory, inpath, realpath) ) |
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{ |
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for (size_t i = 0; i < fileSystems.size(); i++) |
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{ |
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size_t prefLen = fileSystems[i].prefix.size(); |
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if (strncasecmp(fileSystems[i].prefix.c_str(), realpath.c_str(), prefLen) == 0) |
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{ |
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outpath = realpath.substr(prefLen); |
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*system = &(fileSystems[i]); |
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INFO_LOG(FILESYS, "MapFilePath: mapped \"%s\" to prefix: \"%s\", path: \"%s\"", inpath.c_str(), fileSystems[i].prefix.c_str(), outpath.c_str()); |
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return true; |
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} |
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} |
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} |
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DEBUG_LOG(FILESYS, "MapFilePath: failed mapping \"%s\", returning false", inpath.c_str()); |
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return false; |
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} |
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void MetaFileSystem::Mount(std::string prefix, IFileSystem *system) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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MountPoint x; |
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x.prefix = prefix; |
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x.system = system; |
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fileSystems.push_back(x); |
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} |
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void MetaFileSystem::Unmount(std::string prefix, IFileSystem *system) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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MountPoint x; |
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x.prefix = prefix; |
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x.system = system; |
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fileSystems.erase(std::remove(fileSystems.begin(), fileSystems.end(), x), fileSystems.end()); |
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} |
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void MetaFileSystem::Shutdown() |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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current = 6; |
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// Ownership is a bit convoluted. Let's just delete everything once.
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std::set<IFileSystem *> toDelete; |
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for (size_t i = 0; i < fileSystems.size(); i++) { |
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toDelete.insert(fileSystems[i].system); |
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} |
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for (auto iter = toDelete.begin(); iter != toDelete.end(); ++iter) |
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{ |
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delete *iter; |
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} |
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fileSystems.clear(); |
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currentDir.clear(); |
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startingDirectory = ""; |
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} |
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u32 MetaFileSystem::OpenWithError(int &error, std::string filename, FileAccess access, const char *devicename) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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u32 h = OpenFile(filename, access, devicename); |
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error = lastOpenError; |
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return h; |
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} |
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u32 MetaFileSystem::OpenFile(std::string filename, FileAccess access, const char *devicename) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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lastOpenError = 0; |
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std::string of; |
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MountPoint *mount; |
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if (MapFilePath(filename, of, &mount)) |
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{ |
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return mount->system->OpenFile(of, access, mount->prefix.c_str()); |
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} |
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else |
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{ |
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return 0; |
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} |
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} |
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FileInfo MetaFileSystem::GetFileInfo(std::string filename) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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IFileSystem *system; |
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if (MapFilePath(filename, of, &system)) |
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{ |
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return system->GetFileInfo(of); |
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} |
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else |
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{ |
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FileInfo bogus; // TODO
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return bogus; |
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} |
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} |
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bool MetaFileSystem::GetHostPath(const std::string &inpath, std::string &outpath) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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IFileSystem *system; |
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if (MapFilePath(inpath, of, &system)) { |
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return system->GetHostPath(of, outpath); |
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} else { |
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return false; |
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} |
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} |
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std::vector<FileInfo> MetaFileSystem::GetDirListing(std::string path) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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IFileSystem *system; |
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if (MapFilePath(path, of, &system)) |
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{ |
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return system->GetDirListing(of); |
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} |
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else |
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{ |
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std::vector<FileInfo> empty; |
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return empty; |
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} |
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} |
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void MetaFileSystem::ThreadEnded(int threadID) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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currentDir.erase(threadID); |
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} |
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int MetaFileSystem::ChDir(const std::string &dir) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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// Retain the old path and fail if the arg is 1023 bytes or longer.
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if (dir.size() >= 1023) |
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return -1;//SCE_KERNEL_ERROR_NAMETOOLONG;
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_assert_msg_(FILESYS, false, "must implement equiv of __KernelGetCurThread"); |
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int curThread = 0; //__KernelGetCurThread();
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std::string of; |
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MountPoint *mountPoint; |
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if (MapFilePath(dir, of, &mountPoint)) |
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{ |
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currentDir[curThread] = mountPoint->prefix + of; |
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return 0; |
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} |
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else |
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{ |
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for (size_t i = 0; i < fileSystems.size(); i++) |
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{ |
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const std::string &prefix = fileSystems[i].prefix; |
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if (strncasecmp(prefix.c_str(), dir.c_str(), prefix.size()) == 0) |
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{ |
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// The PSP is completely happy with invalid current dirs as long as they have a valid device.
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WARN_LOG(FILESYS, "ChDir failed to map path \"%s\", saving as current directory anyway", dir.c_str()); |
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currentDir[curThread] = dir; |
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return 0; |
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} |
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} |
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WARN_LOG(FILESYS, "ChDir failed to map device for \"%s\", failing", dir.c_str()); |
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return -1;//SCE_KERNEL_ERROR_NODEV;
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} |
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} |
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bool MetaFileSystem::MkDir(const std::string &dirname) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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IFileSystem *system; |
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if (MapFilePath(dirname, of, &system)) |
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{ |
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return system->MkDir(of); |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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bool MetaFileSystem::RmDir(const std::string &dirname) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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IFileSystem *system; |
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if (MapFilePath(dirname, of, &system)) |
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{ |
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return system->RmDir(of); |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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int MetaFileSystem::RenameFile(const std::string &from, const std::string &to) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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std::string rf; |
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IFileSystem *osystem; |
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IFileSystem *rsystem = NULL; |
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if (MapFilePath(from, of, &osystem)) |
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{ |
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// If it's a relative path, it seems to always use from's filesystem.
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if (to.find(":/") != to.npos) |
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{ |
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if (!MapFilePath(to, rf, &rsystem)) |
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return -1; |
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} |
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else |
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{ |
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rf = to; |
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rsystem = osystem; |
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} |
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if (osystem != rsystem) |
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return -1;//SCE_KERNEL_ERROR_XDEV;
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return osystem->RenameFile(of, rf); |
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} |
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else |
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{ |
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return -1; |
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} |
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} |
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bool MetaFileSystem::RemoveFile(const std::string &filename) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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std::string of; |
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IFileSystem *system; |
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if (MapFilePath(filename, of, &system)) |
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{ |
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return system->RemoveFile(of); |
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} |
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else |
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{ |
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return false; |
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} |
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} |
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void MetaFileSystem::CloseFile(u32 handle) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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IFileSystem *sys = GetHandleOwner(handle); |
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if (sys) |
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sys->CloseFile(handle); |
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} |
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size_t MetaFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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IFileSystem *sys = GetHandleOwner(handle); |
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if (sys) |
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return sys->ReadFile(handle,pointer,size); |
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else |
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return 0; |
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} |
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size_t MetaFileSystem::WriteFile(u32 handle, const u8 *pointer, s64 size) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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IFileSystem *sys = GetHandleOwner(handle); |
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if (sys) |
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return sys->WriteFile(handle,pointer,size); |
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else |
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return 0; |
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} |
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size_t MetaFileSystem::SeekFile(u32 handle, s32 position, FileMove type) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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IFileSystem *sys = GetHandleOwner(handle); |
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if (sys) |
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return sys->SeekFile(handle,position,type); |
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else |
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return 0; |
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} |
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void MetaFileSystem::DoState(PointerWrap &p) |
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{ |
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std::lock_guard<std::mutex> guard(lock); |
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auto s = p.Section("MetaFileSystem", 1); |
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if (!s) |
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return; |
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p.Do(current); |
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// Save/load per-thread current directory map
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p.Do(currentDir); |
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u32 n = (u32) fileSystems.size(); |
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p.Do(n); |
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if (n != (u32) fileSystems.size()) |
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{ |
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p.SetError(p.ERROR_FAILURE); |
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ERROR_LOG(FILESYS, "Savestate failure: number of filesystems doesn't match."); |
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return; |
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} |
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for (u32 i = 0; i < n; ++i) |
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fileSystems[i].system->DoState(p); |
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} |
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@ -0,0 +1,109 @@ |
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// 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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#include "std_mutex.h" |
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#include "file_sys.h" |
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class MetaFileSystem : public IHandleAllocator, public IFileSystem |
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{ |
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private: |
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u32 current; |
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struct MountPoint |
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{ |
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std::string prefix; |
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IFileSystem *system; |
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bool operator == (const MountPoint &other) const |
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{ |
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return prefix == other.prefix && system == other.system; |
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} |
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}; |
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std::vector<MountPoint> fileSystems; |
|||
|
|||
typedef std::map<int, std::string> currentDir_t; |
|||
currentDir_t currentDir; |
|||
|
|||
std::string startingDirectory; |
|||
int lastOpenError; |
|||
std::recursive_mutex lock; |
|||
|
|||
public: |
|||
MetaFileSystem() |
|||
{ |
|||
current = 6; // what? |
|||
} |
|||
|
|||
void Mount(std::string prefix, IFileSystem *system); |
|||
void Unmount(std::string prefix, IFileSystem *system); |
|||
|
|||
void ThreadEnded(int threadID); |
|||
|
|||
void Shutdown(); |
|||
|
|||
u32 GetNewHandle() {return current++;} |
|||
void FreeHandle(u32 handle) {} |
|||
|
|||
virtual void DoState(PointerWrap &p); |
|||
|
|||
IFileSystem *GetHandleOwner(u32 handle); |
|||
bool MapFilePath(const std::string &inpath, std::string &outpath, MountPoint **system); |
|||
|
|||
inline bool MapFilePath(const std::string &_inpath, std::string &outpath, IFileSystem **system) |
|||
{ |
|||
MountPoint *mountPoint; |
|||
if (MapFilePath(_inpath, outpath, &mountPoint)) |
|||
{ |
|||
*system = mountPoint->system; |
|||
return true; |
|||
} |
|||
|
|||
return false; |
|||
} |
|||
|
|||
// Only possible if a file system is a DirectoryFileSystem or similar. |
|||
bool GetHostPath(const std::string &inpath, std::string &outpath); |
|||
|
|||
std::vector<FileInfo> GetDirListing(std::string path); |
|||
u32 OpenFile(std::string filename, FileAccess access, const char *devicename = NULL); |
|||
u32 OpenWithError(int &error, std::string filename, FileAccess access, const char *devicename = NULL); |
|||
void CloseFile(u32 handle); |
|||
size_t ReadFile(u32 handle, u8 *pointer, s64 size); |
|||
size_t WriteFile(u32 handle, const u8 *pointer, s64 size); |
|||
size_t SeekFile(u32 handle, s32 position, FileMove type); |
|||
FileInfo GetFileInfo(std::string filename); |
|||
bool OwnsHandle(u32 handle) {return false;} |
|||
inline size_t GetSeekPos(u32 handle) |
|||
{ |
|||
return SeekFile(handle, 0, FILEMOVE_CURRENT); |
|||
} |
|||
|
|||
virtual int ChDir(const std::string &dir); |
|||
|
|||
virtual bool MkDir(const std::string &dirname); |
|||
virtual bool RmDir(const std::string &dirname); |
|||
virtual int RenameFile(const std::string &from, const std::string &to); |
|||
virtual bool RemoveFile(const std::string &filename); |
|||
|
|||
// TODO: void IoCtl(...) |
|||
|
|||
void SetStartingDirectory(const std::string &dir) { |
|||
std::lock_guard<std::mutex> guard(lock); |
|||
startingDirectory = dir; |
|||
} |
|||
}; |
|||
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