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added meta_file_system to project

This commit is contained in:
ShizZy 2013-09-25 21:25:46 -04:00
parent 05d5113701
commit a7b06698ff
4 changed files with 637 additions and 0 deletions
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2
src/core/core.vcxproj
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@ -138,6 +138,7 @@
<ClCompile Include="src\arm\disassembler\arm_disasm.cpp" /> <ClCompile Include="src\arm\disassembler\arm_disasm.cpp" />
<ClCompile Include="src\core.cpp" /> <ClCompile Include="src\core.cpp" />
<ClCompile Include="src\file_sys\directory_file_system.cpp" /> <ClCompile Include="src\file_sys\directory_file_system.cpp" />
<ClCompile Include="src\file_sys\meta_file_system.cpp" />
<ClCompile Include="src\loader.cpp" /> <ClCompile Include="src\loader.cpp" />
<ClCompile Include="src\mem_map.cpp" /> <ClCompile Include="src\mem_map.cpp" />
<ClCompile Include="src\mem_map_funcs.cpp" /> <ClCompile Include="src\mem_map_funcs.cpp" />
@ -159,6 +160,7 @@
<ClInclude Include="src\core.h" /> <ClInclude Include="src\core.h" />
<ClInclude Include="src\file_sys\directory_file_system.h" /> <ClInclude Include="src\file_sys\directory_file_system.h" />
<ClInclude Include="src\file_sys\file_sys.h" /> <ClInclude Include="src\file_sys\file_sys.h" />
<ClInclude Include="src\file_sys\meta_file_system.h" />
<ClInclude Include="src\loader.h" /> <ClInclude Include="src\loader.h" />
<ClInclude Include="src\mem_map.h" /> <ClInclude Include="src\mem_map.h" />
</ItemGroup> </ItemGroup>

6
src/core/core.vcxproj.filters
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@ -17,6 +17,9 @@
<ClCompile Include="src\file_sys\directory_file_system.cpp"> <ClCompile Include="src\file_sys\directory_file_system.cpp">
<Filter>file_sys</Filter> <Filter>file_sys</Filter>
</ClCompile> </ClCompile>
<ClCompile Include="src\file_sys\meta_file_system.cpp">
<Filter>file_sys</Filter>
</ClCompile>
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<Filter Include="arm"> <Filter Include="arm">
@ -81,6 +84,9 @@
<ClInclude Include="src\file_sys\directory_file_system.h"> <ClInclude Include="src\file_sys\directory_file_system.h">
<Filter>file_sys</Filter> <Filter>file_sys</Filter>
</ClInclude> </ClInclude>
<ClInclude Include="src\file_sys\meta_file_system.h">
<Filter>file_sys</Filter>
</ClInclude>
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<None Include="CMakeLists.txt" /> <None Include="CMakeLists.txt" />

520
src/core/src/file_sys/meta_file_system.cpp Normal file
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@ -0,0 +1,520 @@
// 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/.
#include <set>
#include <algorithm>
#include "string_util.h"
#include "file_sys/meta_file_system.h"
//#include "Core/HLE/sceKernelThread.h"
//#include "Core/Reporting.h"
static bool ApplyPathStringToComponentsVector(std::vector<std::string> &vector, const std::string &pathString)
{
size_t len = pathString.length();
size_t start = 0;
while (start < len)
{
size_t i = pathString.find('/', start);
if (i == std::string::npos)
i = len;
if (i > start)
{
std::string component = pathString.substr(start, i - start);
if (component != ".")
{
if (component == "..")
{
if (vector.size() != 0)
{
vector.pop_back();
}
else
{
// The PSP silently ignores attempts to .. to parent of root directory
WARN_LOG(FILESYS, "RealPath: ignoring .. beyond root - root directory is its own parent: \"%s\"", pathString.c_str());
}
}
else
{
vector.push_back(component);
}
}
}
start = i + 1;
}
return true;
}
/*
* Changes relative paths to absolute, removes ".", "..", and trailing "/"
* "drive:./blah" is absolute (ignore the dot) and "/blah" is relative (because it's missing "drive:")
* babel (and possibly other games) use "/directoryThatDoesNotExist/../directoryThatExists/filename"
*/
static bool RealPath(const std::string &currentDirectory, const std::string &inPath, std::string &outPath)
{
size_t inLen = inPath.length();
if (inLen == 0)
{
WARN_LOG(FILESYS, "RealPath: inPath is empty");
outPath = currentDirectory;
return true;
}
size_t inColon = inPath.find(':');
if (inColon + 1 == inLen)
{
// There's nothing after the colon, e.g. umd0: - this is perfectly valid.
outPath = inPath;
return true;
}
bool relative = (inColon == std::string::npos);
std::string prefix, inAfterColon;
std::vector<std::string> cmpnts; // path components
size_t outPathCapacityGuess = inPath.length();
if (relative)
{
size_t curDirLen = currentDirectory.length();
if (curDirLen == 0)
{
ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory is empty", inPath.c_str());
return false;
}
size_t curDirColon = currentDirectory.find(':');
if (curDirColon == std::string::npos)
{
ERROR_LOG(FILESYS, "RealPath: inPath \"%s\" is relative, but current directory \"%s\" has no prefix", inPath.c_str(), currentDirectory.c_str());
return false;
}
if (curDirColon + 1 == curDirLen)
{
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());
}
else
{
const std::string curDirAfter = currentDirectory.substr(curDirColon + 1);
if (! ApplyPathStringToComponentsVector(cmpnts, curDirAfter) )
{
ERROR_LOG(FILESYS,"RealPath: currentDirectory is not a valid path: \"%s\"", currentDirectory.c_str());
return false;
}
outPathCapacityGuess += curDirLen;
}
prefix = currentDirectory.substr(0, curDirColon + 1);
inAfterColon = inPath;
}
else
{
prefix = inPath.substr(0, inColon + 1);
inAfterColon = inPath.substr(inColon + 1);
}
// Special case: "disc0:" is different from "disc0:/", so keep track of the single slash.
if (inAfterColon == "/")
{
outPath = prefix + inAfterColon;
return true;
}
if (! ApplyPathStringToComponentsVector(cmpnts, inAfterColon) )
{
WARN_LOG(FILESYS, "RealPath: inPath is not a valid path: \"%s\"", inPath.c_str());
return false;
}
outPath.clear();
outPath.reserve(outPathCapacityGuess);
outPath.append(prefix);
size_t numCmpnts = cmpnts.size();
for (size_t i = 0; i < numCmpnts; i++)
{
outPath.append(1, '/');
outPath.append(cmpnts[i]);
}
return true;
}
IFileSystem *MetaFileSystem::GetHandleOwner(u32 handle)
{
std::lock_guard<std::mutex> guard(lock);
for (size_t i = 0; i < fileSystems.size(); i++)
{
if (fileSystems[i].system->OwnsHandle(handle))
return fileSystems[i].system; //got it!
}
//none found?
return 0;
}
bool MetaFileSystem::MapFilePath(const std::string &_inpath, std::string &outpath, MountPoint **system)
{
std::lock_guard<std::mutex> guard(lock);
std::string realpath;
// Special handling: host0:command.txt (as seen in Super Monkey Ball Adventures, for example)
// appears to mean the current directory on the UMD. Let's just assume the current directory.
std::string inpath = _inpath;
if (strncasecmp(inpath.c_str(), "host0:", strlen("host0:")) == 0) {
INFO_LOG(FILESYS, "Host0 path detected, stripping: %s", inpath.c_str());
inpath = inpath.substr(strlen("host0:"));
}
const std::string *currentDirectory = &startingDirectory;
_assert_msg_(FILESYS, false, "must implement equiv of __KernelGetCurThread");
int currentThread = 0;//__KernelGetCurThread();
currentDir_t::iterator it = currentDir.find(currentThread);
if (it == currentDir.end())
{
//Attempt to emulate SCE_KERNEL_ERROR_NOCWD / 8002032C: may break things requiring fixes elsewhere
if (inpath.find(':') == std::string::npos /* means path is relative */)
{
lastOpenError = -1;//SCE_KERNEL_ERROR_NOCWD;
WARN_LOG(FILESYS, "Path is relative, but current directory not set for thread %i. returning 8002032C(SCE_KERNEL_ERROR_NOCWD) instead.", currentThread);
}
}
else
{
currentDirectory = &(it->second);
}
if ( RealPath(*currentDirectory, inpath, realpath) )
{
for (size_t i = 0; i < fileSystems.size(); i++)
{
size_t prefLen = fileSystems[i].prefix.size();
if (strncasecmp(fileSystems[i].prefix.c_str(), realpath.c_str(), prefLen) == 0)
{
outpath = realpath.substr(prefLen);
*system = &(fileSystems[i]);
INFO_LOG(FILESYS, "MapFilePath: mapped \"%s\" to prefix: \"%s\", path: \"%s\"", inpath.c_str(), fileSystems[i].prefix.c_str(), outpath.c_str());
return true;
}
}
}
DEBUG_LOG(FILESYS, "MapFilePath: failed mapping \"%s\", returning false", inpath.c_str());
return false;
}
void MetaFileSystem::Mount(std::string prefix, IFileSystem *system)
{
std::lock_guard<std::mutex> guard(lock);
MountPoint x;
x.prefix = prefix;
x.system = system;
fileSystems.push_back(x);
}
void MetaFileSystem::Unmount(std::string prefix, IFileSystem *system)
{
std::lock_guard<std::mutex> guard(lock);
MountPoint x;
x.prefix = prefix;
x.system = system;
fileSystems.erase(std::remove(fileSystems.begin(), fileSystems.end(), x), fileSystems.end());
}
void MetaFileSystem::Shutdown()
{
std::lock_guard<std::mutex> guard(lock);
current = 6;
// Ownership is a bit convoluted. Let's just delete everything once.
std::set<IFileSystem *> toDelete;
for (size_t i = 0; i < fileSystems.size(); i++) {
toDelete.insert(fileSystems[i].system);
}
for (auto iter = toDelete.begin(); iter != toDelete.end(); ++iter)
{
delete *iter;
}
fileSystems.clear();
currentDir.clear();
startingDirectory = "";
}
u32 MetaFileSystem::OpenWithError(int &error, std::string filename, FileAccess access, const char *devicename)
{
std::lock_guard<std::mutex> guard(lock);
u32 h = OpenFile(filename, access, devicename);
error = lastOpenError;
return h;
}
u32 MetaFileSystem::OpenFile(std::string filename, FileAccess access, const char *devicename)
{
std::lock_guard<std::mutex> guard(lock);
lastOpenError = 0;
std::string of;
MountPoint *mount;
if (MapFilePath(filename, of, &mount))
{
return mount->system->OpenFile(of, access, mount->prefix.c_str());
}
else
{
return 0;
}
}
FileInfo MetaFileSystem::GetFileInfo(std::string filename)
{
std::lock_guard<std::mutex> guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(filename, of, &system))
{
return system->GetFileInfo(of);
}
else
{
FileInfo bogus; // TODO
return bogus;
}
}
bool MetaFileSystem::GetHostPath(const std::string &inpath, std::string &outpath)
{
std::lock_guard<std::mutex> guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(inpath, of, &system)) {
return system->GetHostPath(of, outpath);
} else {
return false;
}
}
std::vector<FileInfo> MetaFileSystem::GetDirListing(std::string path)
{
std::lock_guard<std::mutex> guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(path, of, &system))
{
return system->GetDirListing(of);
}
else
{
std::vector<FileInfo> empty;
return empty;
}
}
void MetaFileSystem::ThreadEnded(int threadID)
{
std::lock_guard<std::mutex> guard(lock);
currentDir.erase(threadID);
}
int MetaFileSystem::ChDir(const std::string &dir)
{
std::lock_guard<std::mutex> guard(lock);
// Retain the old path and fail if the arg is 1023 bytes or longer.
if (dir.size() >= 1023)
return -1;//SCE_KERNEL_ERROR_NAMETOOLONG;
_assert_msg_(FILESYS, false, "must implement equiv of __KernelGetCurThread");
int curThread = 0; //__KernelGetCurThread();
std::string of;
MountPoint *mountPoint;
if (MapFilePath(dir, of, &mountPoint))
{
currentDir[curThread] = mountPoint->prefix + of;
return 0;
}
else
{
for (size_t i = 0; i < fileSystems.size(); i++)
{
const std::string &prefix = fileSystems[i].prefix;
if (strncasecmp(prefix.c_str(), dir.c_str(), prefix.size()) == 0)
{
// The PSP is completely happy with invalid current dirs as long as they have a valid device.
WARN_LOG(FILESYS, "ChDir failed to map path \"%s\", saving as current directory anyway", dir.c_str());
currentDir[curThread] = dir;
return 0;
}
}
WARN_LOG(FILESYS, "ChDir failed to map device for \"%s\", failing", dir.c_str());
return -1;//SCE_KERNEL_ERROR_NODEV;
}
}
bool MetaFileSystem::MkDir(const std::string &dirname)
{
std::lock_guard<std::mutex> guard(lock);
std::string of;
IFileSystem *system;
if (MapFilePath(dirname, of, &system))
{
return system->MkDir(of);
}
else
{
return false;
}
}
bool MetaFileSystem::RmDir(const std::string &dirname)
{
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);
}

109
src/core/src/file_sys/meta_file_system.h Normal file
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@ -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;
}
};