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3fa89b4e9f
Instance of FileReader is no longer destructed when header of data file is valid but complete loading of file fails Loading of truncated .zip file is the simplest test case
149 lines
4.2 KiB
C++
149 lines
4.2 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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#include "cmdlib.h"
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#include "v_text.h"
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#include "w_wad.h"
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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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int filepos, filelen;
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} ;
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struct dpackheader_t
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{
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int ident; // == IDPAKHEADER
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int dirofs;
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int dirlen;
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} ;
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//==========================================================================
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//
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// Wad file
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//
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//==========================================================================
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class FPakFile : public FUncompressedFile
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{
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public:
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FPakFile(const char * filename, FileReader *file);
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bool Open(bool quiet);
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};
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//==========================================================================
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//
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// FWadFile::FWadFile
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//
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// Initializes a WAD file
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//
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//==========================================================================
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FPakFile::FPakFile(const char *filename, FileReader *file) : FUncompressedFile(filename, file)
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{
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Lumps = NULL;
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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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bool FPakFile::Open(bool quiet)
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{
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dpackheader_t header;
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Reader->Read(&header, sizeof(header));
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NumLumps = LittleLong(header.dirlen) / sizeof(dpackfile_t);
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header.dirofs = LittleLong(header.dirofs);
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dpackfile_t *fileinfo = new dpackfile_t[NumLumps];
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Reader->Seek (header.dirofs, SEEK_SET);
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Reader->Read (fileinfo, NumLumps * sizeof(dpackfile_t));
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Lumps = new FUncompressedLump[NumLumps];
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if (!quiet) Printf(", %d lumps\n", NumLumps);
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for(DWORD i = 0; i < NumLumps; i++)
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{
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Lumps[i].LumpNameSetup(fileinfo[i].name);
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Lumps[i].Owner = this;
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Lumps[i].Position = LittleLong(fileinfo[i].filepos);
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Lumps[i].LumpSize = LittleLong(fileinfo[i].filelen);
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Lumps[i].CheckEmbedded();
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}
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delete [] fileinfo;
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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, bool quiet)
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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, SEEK_SET);
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file->Read(&head, 4);
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file->Seek(0, SEEK_SET);
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if (!memcmp(head, "PACK", 4))
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{
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FResourceFile *rf = new FPakFile(filename, file);
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if (rf->Open(quiet)) return rf;
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rf->Reader = NULL; // to avoid destruction of reader
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delete rf;
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}
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}
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return NULL;
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}
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