121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/*
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** file_pak.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright 2009 Christoph Oelckers
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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#include "resourcefile.h"
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namespace FileSys {
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using namespace byteswap;
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//==========================================================================
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//
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//
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//
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//==========================================================================
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struct dpackfile_t
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{
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char name[56];
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uint32_t filepos, filelen;
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} ;
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struct dpackheader_t
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{
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uint32_t ident; // == IDPAKHEADER
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uint32_t dirofs;
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uint32_t dirlen;
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} ;
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//==========================================================================
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//
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// Open it
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//
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//==========================================================================
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static bool OpenPak(FResourceFile* file, LumpFilterInfo* filter)
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{
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dpackheader_t header;
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auto Reader = file->GetContainerReader();
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Reader->Read(&header, sizeof(header));
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uint32_t NumLumps = header.dirlen / sizeof(dpackfile_t);
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auto Entries = file->AllocateEntries(NumLumps);
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header.dirofs = LittleLong(header.dirofs);
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Reader->Seek (header.dirofs, FileReader::SeekSet);
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auto fd = Reader->Read (NumLumps * sizeof(dpackfile_t));
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auto fileinfo = (const dpackfile_t*)fd.data();
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for(uint32_t i = 0; i < NumLumps; i++)
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{
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Entries[i].Position = LittleLong(fileinfo[i].filepos);
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Entries[i].CompressedSize = Entries[i].Length = LittleLong(fileinfo[i].filelen);
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Entries[i].Flags = RESFF_FULLPATH;
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Entries[i].Namespace = ns_global;
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Entries[i].ResourceID = -1;
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Entries[i].Method = METHOD_STORED;
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Entries[i].FileName = file->NormalizeFileName(fileinfo[i].name);
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}
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file->GenerateHash();
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file->PostProcessArchive(filter);
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return true;
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}
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//==========================================================================
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//
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// File open
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//
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//==========================================================================
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FResourceFile *CheckPak(const char *filename, FileReader &file, LumpFilterInfo* filter, FileSystemMessageFunc Printf, StringPool* sp)
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{
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char head[4];
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if (file.GetLength() >= 12)
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{
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file.Seek(0, FileReader::SeekSet);
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file.Read(&head, 4);
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file.Seek(0, FileReader::SeekSet);
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if (!memcmp(head, "PACK", 4))
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{
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auto rf = new FResourceFile(filename, file, sp);
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if (OpenPak(rf, filter)) return rf;
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file = rf->Destroy();
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}
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}
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return NULL;
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}
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}
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