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Add a way to restrict ISO reading to a single path.

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This is for GameInfoCache.
This commit is contained in:
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2013-03-31 21:36:12 -07:00
parent 20bb55e1cb
commit d11a5debcb
3 changed files with 32 additions and 8 deletions
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Core/FileSystems/ISOFileSystem.cpp
+25 -5
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@@ -133,8 +133,21 @@ struct VolDescriptor
std::list<ISOFileSystem::TreeEntry *> ISOFileSystem::entryFreeList;
ISOFileSystem::ISOFileSystem(IHandleAllocator *_hAlloc, BlockDevice *_blockDevice)
ISOFileSystem::ISOFileSystem(IHandleAllocator *_hAlloc, BlockDevice *_blockDevice, std::string _restrictPath)
{
if (!_restrictPath.empty())
{
size_t pos = _restrictPath.find_first_not_of('/');
while (!_restrictPath.empty())
{
size_t endPos = _restrictPath.find_first_of('/', pos);
if (pos != endPos)
restrictTree.push_back(_restrictPath.substr(pos, endPos));
pos = _restrictPath.find_first_not_of('/', endPos);
_restrictPath.erase(0, pos);
}
}
blockDevice = _blockDevice;
hAlloc = _hAlloc;
@@ -169,7 +182,7 @@ ISOFileSystem::ISOFileSystem(IHandleAllocator *_hAlloc, BlockDevice *_blockDevic
u32 rootSector = desc.root.firstDataSectorLE;
u32 rootSize = desc.root.dataLengthLE;
ReadDirectory(rootSector, rootSize, treeroot);
ReadDirectory(rootSector, rootSize, treeroot, 0);
}
ISOFileSystem::~ISOFileSystem()
@@ -178,7 +191,7 @@ ISOFileSystem::~ISOFileSystem()
ReleaseTreeEntry(treeroot);
}
void ISOFileSystem::ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root)
void ISOFileSystem::ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root, size_t level)
{
for (u32 secnum = startsector, endsector = dirsize/2048 + startsector; secnum < endsector; ++secnum)
{
@@ -198,7 +211,7 @@ void ISOFileSystem::ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root)
if (offset + IDENTIFIER_OFFSET + dir.identifierLength > 2048)
{
ERROR_LOG(FILESYS, "Directory entry crosses sectors, corrupt iso?");
break;
return;
}
offset += dir.size;
@@ -241,7 +254,14 @@ void ISOFileSystem::ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root)
}
else
{
ReadDirectory(dir.firstDataSectorLE, dir.dataLengthLE, e);
bool doRecurse = true;
if (!restrictTree.empty())
doRecurse = level < restrictTree.size() && restrictTree[level] == e->name;
if (doRecurse)
ReadDirectory(dir.firstDataSectorLE, dir.dataLengthLE, e, level + 1);
else
continue;
}
}
root->children.push_back(e);