mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-12-13 16:45:46 +00:00
530 lines
12 KiB
C++
530 lines
12 KiB
C++
// 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 "Globals.h"
|
|
#include "Log.h"
|
|
#include "ISOFileSystem.h"
|
|
#include <cstring>
|
|
#include <cstdio>
|
|
|
|
const int sectorSize = 2048;
|
|
|
|
static bool parseLBN(std::string filename, u32 *sectorStart, u32 *readSize)
|
|
{
|
|
if (filename.substr(0, 8) != "/sce_lbn")
|
|
return false;
|
|
std::string yo = filename;
|
|
filename.erase(0, 10);
|
|
sscanf(filename.c_str(), "%08x", sectorStart);
|
|
filename.erase(0, filename.find("_size") + 7);
|
|
sscanf(filename.c_str(), "%08x", readSize);
|
|
return true;
|
|
}
|
|
|
|
#pragma pack(push)
|
|
#pragma pack(1)
|
|
struct DirectoryEntry
|
|
{
|
|
u8 size;
|
|
u8 sectorsInExtendedRecord;
|
|
u32 firstDataSectorLE; // LBA
|
|
u32 firstDataSectorBE;
|
|
u32 dataLengthLE; // Size
|
|
u32 dataLengthBE;
|
|
u8 years;
|
|
u8 month;
|
|
u8 day;
|
|
u8 hour;
|
|
u8 minute;
|
|
u8 second;
|
|
u8 offsetFromGMT;
|
|
u8 flags; // 2 = directory
|
|
u8 fileUnitSize;
|
|
u8 interleaveGap;
|
|
u16 volSeqNumberLE;
|
|
u16 volSeqNumberBE;
|
|
u8 identifierLength; //identifier comes right after
|
|
u8 firstIdChar;
|
|
};
|
|
struct DirectorySector
|
|
{
|
|
DirectoryEntry entry;
|
|
char space[2048-sizeof(DirectoryEntry)];
|
|
};
|
|
|
|
struct VolDescriptor
|
|
{
|
|
char type;
|
|
char cd001[6];
|
|
char version;
|
|
char sysid[32];
|
|
char volid[32];
|
|
char zeros[8];
|
|
u32 numSectorsLE;
|
|
u32 numSectoreBE;
|
|
char morezeros[32];
|
|
u16 volSetSizeLE;
|
|
u16 volSetSizeBE;
|
|
u16 volSeqNumLE;
|
|
u16 volSeqNumBE;
|
|
u16 sectorSizeLE;
|
|
u16 sectorSizeBE;
|
|
u32 pathTableLengthLE;
|
|
u32 pathTableLengthBE;
|
|
u16 firstLETableSectorLE;
|
|
u16 firstLETableSectorBE;
|
|
u16 secondLETableSectorLE;
|
|
u16 secondLETableSectorBE;
|
|
u16 firstBETableSectorLE;
|
|
u16 firstBETableSectorBE;
|
|
u16 secondBETableSectorLE;
|
|
u16 secondBETableSectorBE;
|
|
DirectoryEntry root;
|
|
char volumeSetIdentifier[128];
|
|
char publisherIdentifier[128];
|
|
char dataPreparerIdentifier[128];
|
|
char applicationIdentifier[128];
|
|
char copyrightFileIdentifier[37];
|
|
char abstractFileIdentifier[37];
|
|
char bibliographicalFileIdentifier[37];
|
|
char volCreationDateTime[17];
|
|
char mreModDateTime[17];
|
|
char volExpireDateTime[17];
|
|
char volEffectiveDateTime[17];
|
|
char one;
|
|
char zero;
|
|
char reserved[512];
|
|
char zeroos[653];
|
|
};
|
|
|
|
#pragma pack(pop)
|
|
|
|
ISOFileSystem::ISOFileSystem(IHandleAllocator *_hAlloc, BlockDevice *_blockDevice)
|
|
{
|
|
blockDevice = _blockDevice;
|
|
hAlloc = _hAlloc;
|
|
|
|
VolDescriptor desc;
|
|
blockDevice->ReadBlock(16, (u8*)&desc);
|
|
|
|
entireISO.name = "";
|
|
entireISO.isDirectory = false;
|
|
entireISO.startingPosition = 0;
|
|
entireISO.size = _blockDevice->GetNumBlocks() * _blockDevice->GetBlockSize();
|
|
entireISO.isBlockSectorMode = true;
|
|
entireISO.flags = 0;
|
|
|
|
if (!memcmp(desc.cd001, "CD001", 5))
|
|
{
|
|
INFO_LOG(FILESYS, "Looks like a valid ISO!");
|
|
}
|
|
else
|
|
{
|
|
ERROR_LOG(FILESYS, "ISO looks bogus? trying anyway...");
|
|
}
|
|
|
|
treeroot = new TreeEntry;
|
|
|
|
u32 rootSector = desc.root.firstDataSectorLE;
|
|
u32 rootSize = desc.root.dataLengthLE;
|
|
|
|
ReadDirectory(rootSector, rootSize, treeroot);
|
|
}
|
|
|
|
ISOFileSystem::~ISOFileSystem()
|
|
{
|
|
delete blockDevice;
|
|
}
|
|
|
|
void ISOFileSystem::ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root)
|
|
{
|
|
u8 buffer[2048];
|
|
int offset = 0;
|
|
u32 secnum = startsector;
|
|
|
|
u8 theSector[2048];
|
|
blockDevice->ReadBlock(secnum, theSector);
|
|
|
|
while (secnum < (dirsize/2048 + startsector))
|
|
{
|
|
DirectoryEntry &dir = *((DirectoryEntry *)buffer);
|
|
u8 sz = theSector[offset];
|
|
if (sz == 0) // NOT the correct way
|
|
goto nextblock; //done
|
|
|
|
memcpy(&dir, theSector + offset, sz);
|
|
|
|
buffer[2047]=0;
|
|
offset += dir.size;
|
|
if (offset >= 2048)
|
|
{
|
|
nextblock:
|
|
offset=0;
|
|
secnum++;
|
|
blockDevice->ReadBlock(secnum, theSector);
|
|
memcpy(&dir, theSector + offset, sz);
|
|
}
|
|
bool isFile = (dir.flags & 2) ? false : true;
|
|
|
|
int fnLength = dir.identifierLength;
|
|
|
|
char name[256];
|
|
for (int i = 0; i < fnLength; i++)
|
|
name[i] = buffer[33+i] ? buffer[33+i] : '.';
|
|
name[fnLength] = '\0';
|
|
|
|
bool relative = false;
|
|
|
|
if (!strcmp(name, ".")) // "." record
|
|
{
|
|
relative = true;
|
|
}
|
|
|
|
if (strlen(name) == 1 && name[0] == '\x01') // ".." record
|
|
{
|
|
strcpy(name,"..");
|
|
relative=true;
|
|
}
|
|
|
|
TreeEntry *e = new TreeEntry;
|
|
e->name = name;
|
|
e->size = dir.dataLengthLE;
|
|
e->startingPosition = dir.firstDataSectorLE * 2048;
|
|
e->isDirectory = !isFile;
|
|
e->flags = dir.flags;
|
|
e->isBlockSectorMode = false;
|
|
|
|
// Let's not excessively spam the log - I commented this line out.
|
|
// DEBUG_LOG(FILESYS, "%s: %s %08x %08x %i", e->isDirectory?"D":"F", name, dir.firstDataSectorLE, e->startingPosition, e->startingPosition);
|
|
|
|
if (e->isDirectory && !relative)
|
|
{
|
|
if (dir.firstDataSectorLE == startsector)
|
|
{
|
|
ERROR_LOG(FILESYS, "WARNING: Appear to have a recursive file system, breaking recursion");
|
|
}
|
|
else
|
|
{
|
|
ReadDirectory(dir.firstDataSectorLE, dir.dataLengthLE, e);
|
|
}
|
|
}
|
|
root->children.push_back(e);
|
|
}
|
|
|
|
}
|
|
|
|
ISOFileSystem::TreeEntry *ISOFileSystem::GetFromPath(std::string path)
|
|
{
|
|
if (path.length() == 0)
|
|
{
|
|
//Ah, the device! "umd0:"
|
|
return &entireISO;
|
|
}
|
|
|
|
if (path.substr(0,2) == "./")
|
|
path.erase(0,2);
|
|
|
|
if (path[0] == '/')
|
|
path.erase(0,1);
|
|
|
|
TreeEntry *e = treeroot;
|
|
if (path.length() == 0)
|
|
return e;
|
|
|
|
while (true)
|
|
{
|
|
TreeEntry *ne = 0;
|
|
std::string name = "";
|
|
if (path.length()>0)
|
|
{
|
|
for (size_t i=0; i<e->children.size(); i++)
|
|
{
|
|
std::string n = e->children[i]->name;
|
|
std::string curPath = path.substr(0, path.find_first_of('/'));
|
|
if (curPath == n)
|
|
{
|
|
//yay we got it
|
|
ne = e->children[i];
|
|
name = n;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (ne)
|
|
{
|
|
e = ne;
|
|
size_t l = name.length();
|
|
path.erase(0, l);
|
|
if (path.length() == 0 || (path.length()==1 && path[0] == '/'))
|
|
return e;
|
|
path.erase(0, 1);
|
|
while (path[0] == '/')
|
|
path.erase(0, 1);
|
|
}
|
|
else
|
|
{
|
|
ERROR_LOG(FILESYS,"File %s not found", path.c_str());
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
u32 ISOFileSystem::OpenFile(std::string filename, FileAccess access)
|
|
{
|
|
// LBN unittest
|
|
/*
|
|
u32 a, b;
|
|
if (parseLBN("/sce_lbn0x307aa_size0xefffe000", &a, &b)) {
|
|
ERROR_LOG(FILESYS, "lbn: %08x %08x", a, b);
|
|
} else {
|
|
ERROR_LOG(FILESYS, "faillbn: %08x %08x", a, b);
|
|
}*/
|
|
|
|
|
|
OpenFileEntry entry;
|
|
if (filename.compare(0,8,"/sce_lbn") == 0)
|
|
{
|
|
u32 sectorStart = 0xFFFFFFFF, readSize = 0xFFFFFFFF;
|
|
parseLBN(filename, §orStart, &readSize);
|
|
INFO_LOG(FILESYS, "Got a raw sector open: %s, sector %08x, size %08x", filename.c_str(), sectorStart, readSize);
|
|
u32 newHandle = hAlloc->GetNewHandle();
|
|
entry.seekPos = 0;
|
|
entry.file = 0;
|
|
entry.isRawSector = true;
|
|
entry.sectorStart = sectorStart;
|
|
entry.openSize = readSize;
|
|
entries[newHandle] = entry;
|
|
return newHandle;
|
|
}
|
|
|
|
entry.isRawSector = false;
|
|
|
|
if (access & FILEACCESS_WRITE)
|
|
{
|
|
ERROR_LOG(FILESYS, "Can't open file %s with write access on an ISO partition", filename.c_str());
|
|
return 0;
|
|
}
|
|
|
|
// May return entireISO for "umd0:"
|
|
entry.file = GetFromPath(filename);
|
|
if (!entry.file)
|
|
return 0;
|
|
|
|
entry.seekPos = 0;
|
|
|
|
u32 newHandle = hAlloc->GetNewHandle();
|
|
entries[newHandle] = entry;
|
|
return newHandle;
|
|
}
|
|
|
|
void ISOFileSystem::CloseFile(u32 handle)
|
|
{
|
|
EntryMap::iterator iter = entries.find(handle);
|
|
if (iter != entries.end())
|
|
{
|
|
//CloseHandle((*iter).second.hFile);
|
|
hAlloc->FreeHandle(handle);
|
|
entries.erase(iter);
|
|
}
|
|
else
|
|
{
|
|
//This shouldn't happen...
|
|
ERROR_LOG(HLE,"Hey, what are you doing? Closing non-open files?");
|
|
}
|
|
}
|
|
|
|
bool ISOFileSystem::OwnsHandle(u32 handle)
|
|
{
|
|
EntryMap::iterator iter = entries.find(handle);
|
|
return (iter != entries.end());
|
|
}
|
|
|
|
size_t ISOFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size)
|
|
{
|
|
EntryMap::iterator iter = entries.find(handle);
|
|
if (iter != entries.end())
|
|
{
|
|
OpenFileEntry &e = iter->second;
|
|
|
|
if (e.file != 0 && e.file->isBlockSectorMode)
|
|
{
|
|
// Whole sectors! Shortcut to this simple code.
|
|
for (int i = 0; i < size; i++)
|
|
{
|
|
blockDevice->ReadBlock(e.seekPos, pointer + i * 2048);
|
|
e.seekPos++;
|
|
}
|
|
return (size_t)size;
|
|
}
|
|
|
|
u32 positionOnIso;
|
|
if (e.isRawSector)
|
|
{
|
|
// TODO: this seems bogus
|
|
positionOnIso = e.sectorStart * 2048;
|
|
|
|
if (e.seekPos + size > e.openSize)
|
|
{
|
|
size = e.openSize - e.seekPos;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//clamp read length
|
|
if ((s64)e.seekPos > e.file->size - (s64)size)
|
|
{
|
|
size = e.file->size - (s64)e.seekPos;
|
|
}
|
|
|
|
positionOnIso = e.file->startingPosition + e.seekPos;
|
|
}
|
|
//okay, we have size and position, let's rock
|
|
|
|
u32 totalRead = 0;
|
|
int secNum = positionOnIso / 2048;
|
|
int posInSector = positionOnIso & 2047;
|
|
s64 remain = size;
|
|
|
|
u8 theSector[2048];
|
|
|
|
while (remain > 0)
|
|
{
|
|
blockDevice->ReadBlock(secNum, theSector);
|
|
size_t bytesToCopy = 2048 - posInSector;
|
|
if ((s64)bytesToCopy > remain)
|
|
bytesToCopy = (size_t)remain;
|
|
|
|
memcpy(pointer, theSector + posInSector, bytesToCopy);
|
|
totalRead += (u32)bytesToCopy;
|
|
pointer += bytesToCopy;
|
|
remain -= bytesToCopy;
|
|
posInSector = 0;
|
|
secNum++;
|
|
}
|
|
e.seekPos += (unsigned int)size;
|
|
return totalRead;
|
|
}
|
|
else
|
|
{
|
|
//This shouldn't happen...
|
|
ERROR_LOG(HLE,"Hey, what are you doing? Reading non-open files?");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
size_t ISOFileSystem::WriteFile(u32 handle, const u8 *pointer, s64 size)
|
|
{
|
|
ERROR_LOG(HLE,"Hey, what are you doing? You can't write to an ISO!");
|
|
return 0;
|
|
}
|
|
|
|
size_t ISOFileSystem::SeekFile(u32 handle, s32 position, FileMove type)
|
|
{
|
|
EntryMap::iterator iter = entries.find(handle);
|
|
if (iter != entries.end())
|
|
{
|
|
OpenFileEntry &e = iter->second;
|
|
switch (type)
|
|
{
|
|
case FILEMOVE_BEGIN:
|
|
e.seekPos = position;
|
|
break;
|
|
case FILEMOVE_CURRENT:
|
|
e.seekPos += position;
|
|
break;
|
|
case FILEMOVE_END:
|
|
if (e.isRawSector)
|
|
e.seekPos = e.openSize;
|
|
else
|
|
e.seekPos = (unsigned int)(e.file->size + position);
|
|
break;
|
|
}
|
|
return (size_t)e.seekPos;
|
|
}
|
|
else
|
|
{
|
|
//This shouldn't happen...
|
|
ERROR_LOG(HLE,"Hey, what are you doing? Seeking in non-open files?");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
PSPFileInfo ISOFileSystem::GetFileInfo(std::string filename)
|
|
{
|
|
if (filename.compare(0,8,"/sce_lbn") == 0)
|
|
{
|
|
u32 sectorStart = 0xFFFFFFFF, readSize = 0xFFFFFFFF;
|
|
parseLBN(filename, §orStart, &readSize);
|
|
|
|
PSPFileInfo fileInfo;
|
|
fileInfo.name = filename;
|
|
fileInfo.exists = true;
|
|
fileInfo.size = readSize;
|
|
fileInfo.startSector = sectorStart;
|
|
fileInfo.isOnSectorSystem = true;
|
|
fileInfo.numSectors = (readSize + sectorSize - 1) / sectorSize;
|
|
return fileInfo;
|
|
}
|
|
|
|
TreeEntry *entry = GetFromPath(filename);
|
|
PSPFileInfo x;
|
|
if (!entry)
|
|
{
|
|
x.size = 0;
|
|
x.exists = false;
|
|
}
|
|
else
|
|
{
|
|
x.name = entry->name;
|
|
x.access = FILEACCESS_READ;
|
|
x.size = entry->size;
|
|
x.exists = true;
|
|
x.type = entry->isDirectory ? FILETYPE_DIRECTORY : FILETYPE_NORMAL;
|
|
x.isOnSectorSystem = true;
|
|
x.startSector = entry->startingPosition/2048;
|
|
}
|
|
return x;
|
|
}
|
|
|
|
std::vector<PSPFileInfo> ISOFileSystem::GetDirListing(std::string path)
|
|
{
|
|
std::vector<PSPFileInfo> myVector;
|
|
TreeEntry *entry = GetFromPath(path);
|
|
if (!entry)
|
|
{
|
|
return myVector;
|
|
}
|
|
|
|
for (size_t i=0; i<entry->children.size(); i++)
|
|
{
|
|
TreeEntry *e = entry->children[i];
|
|
|
|
if(!strcmp(e->name.c_str(), ".") || !strcmp(e->name.c_str(), "..")) // do not include the relative entries in the list
|
|
continue;
|
|
|
|
PSPFileInfo x;
|
|
x.name = e->name;
|
|
x.access = FILEACCESS_READ;
|
|
x.size = e->size;
|
|
x.type = e->isDirectory ? FILETYPE_DIRECTORY : FILETYPE_NORMAL;
|
|
x.isOnSectorSystem = true;
|
|
x.startSector = entry->startingPosition/2048;
|
|
myVector.push_back(x);
|
|
}
|
|
return myVector;
|
|
}
|