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git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6000 dfc29bdd-3216-0410-991c-e03cc46cb475
197 lines
4.3 KiB
C++
197 lines
4.3 KiB
C++
// Copyright (C) 2002-2012 Nikolaus Gebhardt
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in irrlicht.h
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// Code contributed by skreamz
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#include "CPakReader.h"
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#ifdef __IRR_COMPILE_WITH_PAK_ARCHIVE_LOADER_
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#include "os.h"
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#include "coreutil.h"
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namespace irr
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{
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namespace io
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{
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namespace
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{
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inline bool isHeaderValid(const SPAKFileHeader& header)
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{
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const c8* tag = header.tag;
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return tag[0] == 'P' &&
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tag[1] == 'A' &&
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tag[2] == 'C' &&
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tag[3] == 'K';
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}
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} // end namespace
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//! Constructor
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CArchiveLoaderPAK::CArchiveLoaderPAK( io::IFileSystem* fs)
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: FileSystem(fs)
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{
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#ifdef _DEBUG
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setDebugName("CArchiveLoaderPAK");
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#endif
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}
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//! returns true if the file maybe is able to be loaded by this class
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bool CArchiveLoaderPAK::isALoadableFileFormat(const io::path& filename) const
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{
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return core::hasFileExtension(filename, "pak");
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}
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//! Check to see if the loader can create archives of this type.
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bool CArchiveLoaderPAK::isALoadableFileFormat(E_FILE_ARCHIVE_TYPE fileType) const
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{
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return fileType == EFAT_PAK;
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}
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//! Creates an archive from the filename
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/** \param file File handle to check.
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\return Pointer to newly created archive, or 0 upon error. */
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IFileArchive* CArchiveLoaderPAK::createArchive(const io::path& filename, bool ignoreCase, bool ignorePaths) const
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{
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IFileArchive *archive = 0;
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io::IReadFile* file = FileSystem->createAndOpenFile(filename);
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if (file)
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{
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archive = createArchive(file, ignoreCase, ignorePaths);
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file->drop ();
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}
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return archive;
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}
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//! creates/loads an archive from the file.
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//! \return Pointer to the created archive. Returns 0 if loading failed.
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IFileArchive* CArchiveLoaderPAK::createArchive(io::IReadFile* file, bool ignoreCase, bool ignorePaths) const
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{
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IFileArchive *archive = 0;
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if ( file )
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{
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file->seek ( 0 );
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archive = new CPakReader(file, ignoreCase, ignorePaths);
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}
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return archive;
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}
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//! Check if the file might be loaded by this class
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/** Check might look into the file.
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\param file File handle to check.
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\return True if file seems to be loadable. */
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bool CArchiveLoaderPAK::isALoadableFileFormat(io::IReadFile* file) const
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{
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SPAKFileHeader header;
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file->read(&header, sizeof(header));
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return isHeaderValid(header);
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}
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/*!
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PAK Reader
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*/
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CPakReader::CPakReader(IReadFile* file, bool ignoreCase, bool ignorePaths)
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: CFileList((file ? file->getFileName() : io::path("")), ignoreCase, ignorePaths), File(file)
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{
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#ifdef _DEBUG
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setDebugName("CPakReader");
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#endif
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if (File)
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{
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File->grab();
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scanLocalHeader();
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sort();
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}
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}
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CPakReader::~CPakReader()
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{
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if (File)
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File->drop();
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}
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const IFileList* CPakReader::getFileList() const
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{
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return this;
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}
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bool CPakReader::scanLocalHeader()
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{
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SPAKFileHeader header;
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// Read and validate the header
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File->read(&header, sizeof(header));
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if (!isHeaderValid(header))
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return false;
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// Seek to the table of contents
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#ifdef __BIG_ENDIAN__
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header.offset = os::Byteswap::byteswap(header.offset);
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header.length = os::Byteswap::byteswap(header.length);
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#endif
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File->seek(header.offset);
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const int numberOfFiles = header.length / sizeof(SPAKFileEntry);
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// Loop through each entry in the table of contents
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for(int i = 0; i < numberOfFiles; i++)
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{
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// read an entry
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SPAKFileEntry entry;
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File->read(&entry, sizeof(entry));
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#ifdef _DEBUG
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os::Printer::log(entry.name);
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#endif
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#ifdef __BIG_ENDIAN__
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entry.offset = os::Byteswap::byteswap(entry.offset);
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entry.length = os::Byteswap::byteswap(entry.length);
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#endif
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addItem(io::path(entry.name), entry.offset, entry.length, false );
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}
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return true;
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}
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//! opens a file by file name
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IReadFile* CPakReader::createAndOpenFile(const io::path& filename)
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{
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s32 index = findFile(filename, false);
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if (index != -1)
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return createAndOpenFile(index);
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return 0;
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}
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//! opens a file by index
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IReadFile* CPakReader::createAndOpenFile(u32 index)
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{
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if (index >= Files.size() )
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return 0;
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const SFileListEntry &entry = Files[index];
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return createLimitReadFile( entry.FullName, File, entry.Offset, entry.Size );
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}
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} // end namespace io
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} // end namespace irr
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#endif // __IRR_COMPILE_WITH_PAK_ARCHIVE_LOADER_
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