genesis-3d_engine/Engine/foundation/io/archfs/archivefilesystembase.cc

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/****************************************************************************
Copyright (c) 2009, Radon Labs GmbH
Copyright (c) 2011-2013,WebJet Business Division,CYOU
http://www.genesis-3d.com.cn
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "stdneb.h"
#include "io/archfs/archivefilesystembase.h"
#include "io/archfs/archive.h"
#include "io/assignregistry.h"
namespace IO
{
__ImplementClass(IO::ArchiveFileSystemBase, 'AFSB', Core::RefCounted);
__ImplementImageSingleton(IO::ArchiveFileSystemBase);
using namespace Util;
//------------------------------------------------------------------------------
/**
*/
ArchiveFileSystemBase::ArchiveFileSystemBase() :
isValid(false)
{
__ConstructImageSingleton;
}
//------------------------------------------------------------------------------
/**
*/
ArchiveFileSystemBase::~ArchiveFileSystemBase()
{
if (this->IsValid())
{
// make sure that derived method is called
this->Discard();
}
__DestructImageSingleton;
}
//------------------------------------------------------------------------------
/**
Setup the archive file system. Subclasses may register their
archive stream classes with the SchemeRegistry here.
*/
void
ArchiveFileSystemBase::Setup()
{
n_assert(!this->IsValid());
this->isValid = true;
}
//------------------------------------------------------------------------------
/**
Discard the archive file system.
*/
void
ArchiveFileSystemBase::Discard()
{
n_assert(this->IsValid());
// unmount all mounted filesystems
while (!this->archives.IsEmpty())
{
// make sure that derived method is called
this->Unmount(this->archives.ValueAtIndex(0));
}
this->isValid = false;
}
//------------------------------------------------------------------------------
/**
This "mounts" an archive file by creating a new Archive object
and adding it to the archive dictionary. If mounting fails, an invalid
pointer will be returned!
*/
GPtr<Archive>
ArchiveFileSystemBase::Mount(const URI& uri)
{
n_assert(!this->IsMounted(uri));
String path = AssignRegistry::Instance()->ResolveAssigns(uri).LocalPath();
GPtr<Archive> newArchive = Archive::Create();
if (newArchive->Setup(uri))
{
this->critSect.Enter();
this->archives.Add(path, newArchive);
this->critSect.Leave();
}
else
{
newArchive = 0;
}
return newArchive;
}
//------------------------------------------------------------------------------
/**
Unmount a zip archive, this will remove the archive from the internal
archive registry, and call the Discard() method on it.
*/
void
ArchiveFileSystemBase::Unmount(const GPtr<Archive>& archive)
{
n_assert(this->IsMounted(archive->GetURI()));
archive->Discard();
String path = AssignRegistry::Instance()->ResolveAssigns(archive->GetURI()).LocalPath();
this->critSect.Enter();
this->archives.Erase(path);
this->critSect.Leave();
}
//------------------------------------------------------------------------------
/**
Unmount an archive by the archive's URI.
*/
void
ArchiveFileSystemBase::Unmount(const URI& uri)
{
n_assert(this->IsMounted(uri));
String path = AssignRegistry::Instance()->ResolveAssigns(uri).LocalPath();
GPtr<Archive> archive = this->archives[path];
archive->Discard();
this->critSect.Enter();
this->archives.Erase(path);
this->critSect.Leave();
}
//------------------------------------------------------------------------------
/**
Return all currently mounted archives.
*/
Array<GPtr<Archive> >
ArchiveFileSystemBase::GetMountedArchives() const
{
this->critSect.Enter();
Array<GPtr<Archive> > archiveArray = this->archives.ValuesAsArray();
this->critSect.Leave();
return archiveArray;
}
//------------------------------------------------------------------------------
/**
Resolve an archive path into an Archive pointer. Returns 0
if no archive with that name exists. The filename will be resolved into
an absolute path internally before the lookup happens.
*/
GPtr<Archive>
ArchiveFileSystemBase::FindArchive(const URI& uri) const
{
String path = AssignRegistry::Instance()->ResolveAssigns(uri).LocalPath();
GPtr<Archive> result;
this->critSect.Enter();
IndexT index = this->archives.FindIndex(path);
if (InvalidIndex != index)
{
result = this->archives.ValueAtIndex(index);
}
this->critSect.Leave();
return result;
}
//------------------------------------------------------------------------------
/**
*/
bool
ArchiveFileSystemBase::IsMounted(const URI& uri) const
{
String path = AssignRegistry::Instance()->ResolveAssigns(uri).LocalPath();
this->critSect.Enter();
bool result = this->archives.Contains(path);
this->critSect.Leave();
return result;
}
//------------------------------------------------------------------------------
/**
This method should return the archive which contains the provided
file URI. Override this method in a derived class!
*/
GPtr<Archive>
ArchiveFileSystemBase::FindArchiveWithFile(const URI& uri) const
{
return GPtr<Archive>();
}
//------------------------------------------------------------------------------
/**
This method should return the archive which contains the
provided directory URI. Override this method in a derived class!
*/
GPtr<Archive>
ArchiveFileSystemBase::FindArchiveWithDir(const URI& uri) const
{
return GPtr<Archive>();
}
//------------------------------------------------------------------------------
/**
This method should check if the provided URI is located in any
of the mounted archives, and if yes, return a converted the URI
which describes how the file in the archive is accessed.
This method must be overriden in a subclass, the base class implementation
will always return the original URI!
*/
URI
ArchiveFileSystemBase::ConvertFileToArchiveURIIfExists(const URI& uri) const
{
if (uri.Scheme() == "file")
{
// make sure that derived method is called
GPtr<Archive> archive = this->FindArchiveWithFile(uri);
if (archive.isvalid())
{
return archive->ConvertToArchiveURI(uri);
}
}
// fallthrough: no match, return original uri
return uri;
}
//------------------------------------------------------------------------------
/**
This method is the directory version of ConvertFileToArchiveURIIfExists().
*/
URI
ArchiveFileSystemBase::ConvertDirToArchiveURIIfExists(const URI& uri) const
{
if (uri.Scheme() == "file")
{
GPtr<Archive> archive = this->FindArchiveWithDir(uri);
if (archive.isvalid())
{
return archive->ConvertToArchiveURI(uri);
}
}
// fallthrough: no match, return original uri
return uri;
}
} // namespace IO