added meta_file_system to project
ShizZy
parent
05d5113701
commit
a7b06698ff
@ -0,0 +1,520 @@
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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);
|
||||||
|
std::string of;
|
||||||
|
IFileSystem *system;
|
||||||
|
if (MapFilePath(dirname, of, &system))
|
||||||
|
{
|
||||||
|
return system->RmDir(of);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int MetaFileSystem::RenameFile(const std::string &from, const std::string &to)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
std::string of;
|
||||||
|
std::string rf;
|
||||||
|
IFileSystem *osystem;
|
||||||
|
IFileSystem *rsystem = NULL;
|
||||||
|
if (MapFilePath(from, of, &osystem))
|
||||||
|
{
|
||||||
|
// If it's a relative path, it seems to always use from's filesystem.
|
||||||
|
if (to.find(":/") != to.npos)
|
||||||
|
{
|
||||||
|
if (!MapFilePath(to, rf, &rsystem))
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
rf = to;
|
||||||
|
rsystem = osystem;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (osystem != rsystem)
|
||||||
|
return -1;//SCE_KERNEL_ERROR_XDEV;
|
||||||
|
|
||||||
|
return osystem->RenameFile(of, rf);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
bool MetaFileSystem::RemoveFile(const std::string &filename)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
std::string of;
|
||||||
|
IFileSystem *system;
|
||||||
|
if (MapFilePath(filename, of, &system))
|
||||||
|
{
|
||||||
|
return system->RemoveFile(of);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void MetaFileSystem::CloseFile(u32 handle)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
IFileSystem *sys = GetHandleOwner(handle);
|
||||||
|
if (sys)
|
||||||
|
sys->CloseFile(handle);
|
||||||
|
}
|
||||||
|
|
||||||
|
size_t MetaFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
IFileSystem *sys = GetHandleOwner(handle);
|
||||||
|
if (sys)
|
||||||
|
return sys->ReadFile(handle,pointer,size);
|
||||||
|
else
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
size_t MetaFileSystem::WriteFile(u32 handle, const u8 *pointer, s64 size)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
IFileSystem *sys = GetHandleOwner(handle);
|
||||||
|
if (sys)
|
||||||
|
return sys->WriteFile(handle,pointer,size);
|
||||||
|
else
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
size_t MetaFileSystem::SeekFile(u32 handle, s32 position, FileMove type)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
IFileSystem *sys = GetHandleOwner(handle);
|
||||||
|
if (sys)
|
||||||
|
return sys->SeekFile(handle,position,type);
|
||||||
|
else
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void MetaFileSystem::DoState(PointerWrap &p)
|
||||||
|
{
|
||||||
|
std::lock_guard<std::mutex> guard(lock);
|
||||||
|
|
||||||
|
auto s = p.Section("MetaFileSystem", 1);
|
||||||
|
if (!s)
|
||||||
|
return;
|
||||||
|
|
||||||
|
p.Do(current);
|
||||||
|
|
||||||
|
// Save/load per-thread current directory map
|
||||||
|
p.Do(currentDir);
|
||||||
|
|
||||||
|
u32 n = (u32) fileSystems.size();
|
||||||
|
p.Do(n);
|
||||||
|
if (n != (u32) fileSystems.size())
|
||||||
|
{
|
||||||
|
p.SetError(p.ERROR_FAILURE);
|
||||||
|
ERROR_LOG(FILESYS, "Savestate failure: number of filesystems doesn't match.");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (u32 i = 0; i < n; ++i)
|
||||||
|
fileSystems[i].system->DoState(p);
|
||||||
|
}
|
||||||
|
|
||||||
@ -0,0 +1,109 @@
|
|||||||
|
// Copyright (c) 2012- PPSSPP Project.
|
||||||
|
|
||||||
|
// This program is free software: you can redistribute it and/or modify
|
||||||
|
// it under the terms of the GNU General Public License as published by
|
||||||
|
// the Free Software Foundation, version 2.0 or later versions.
|
||||||
|
|
||||||
|
// This program is distributed in the hope that it will be useful,
|
||||||
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
// GNU General Public License 2.0 for more details.
|
||||||
|
|
||||||
|
// A copy of the GPL 2.0 should have been included with the program.
|
||||||
|
// If not, see http://www.gnu.org/licenses/
|
||||||
|
|
||||||
|
// Official git repository and contact information can be found at
|
||||||
|
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include "std_mutex.h"
|
||||||
|
#include "file_sys.h"
|
||||||
|
|
||||||
|
class MetaFileSystem : public IHandleAllocator, public IFileSystem
|
||||||
|
{
|
||||||
|
private:
|
||||||
|
u32 current;
|
||||||
|
struct MountPoint
|
||||||
|
{
|
||||||
|
std::string prefix;
|
||||||
|
IFileSystem *system;
|
||||||
|
|
||||||
|
bool operator == (const MountPoint &other) const
|
||||||
|
{
|
||||||
|
return prefix == other.prefix && system == other.system;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
};
|
||||||
Loading…
Reference in New Issue