mirror of
https://github.com/ZDoom/gzdoom-gles.git
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2effc9b803
reading the WAD directory directly. As a side effect it should now be possible to use Zip and 7z for IWADs, too. SVN r1621 (trunk)
155 lines
4.3 KiB
C++
155 lines
4.3 KiB
C++
/*
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** file_grp.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2009 Randy Heit
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** Copyright 2005-2009 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 GrpInfo
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{
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DWORD Magic[3];
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DWORD NumLumps;
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};
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struct GrpLump
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{
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union
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{
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struct
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{
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char Name[12];
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DWORD Size;
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};
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char NameWithZero[13];
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};
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};
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//==========================================================================
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//
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// Build GRP file
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//
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//==========================================================================
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class FGrpFile : public FUncompressedFile
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{
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public:
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FGrpFile(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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// Initializes a Build GRP file
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//
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//==========================================================================
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FGrpFile::FGrpFile(const char *filename, FileReader *file)
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: 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 FGrpFile::Open(bool quiet)
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{
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GrpInfo header;
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Reader->Read(&header, sizeof(header));
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NumLumps = LittleLong(header.NumLumps);
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GrpLump *fileinfo = new GrpLump[NumLumps];
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Reader->Read (fileinfo, NumLumps * sizeof(GrpLump));
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Lumps = new FUncompressedLump[NumLumps];
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int Position = sizeof(GrpInfo) + NumLumps * sizeof(GrpLump);
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for(DWORD i = 0; i < NumLumps; i++)
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{
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Lumps[i].Owner = this;
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Lumps[i].Position = Position;
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Lumps[i].LumpSize = LittleLong(fileinfo[i].Size);
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Position += fileinfo[i].Size;
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Lumps[i].Namespace = ns_global;
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Lumps[i].Flags = 0;
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fileinfo[i].NameWithZero[12] = '\0'; // Be sure filename is null-terminated
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Lumps[i].LumpNameSetup(fileinfo[i].NameWithZero);
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}
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if (!quiet) Printf(", %d lumps\n", NumLumps);
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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 *CheckGRP(const char *filename, FileReader *file, bool quiet)
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{
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char head[12];
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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, 12);
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file->Seek(0, SEEK_SET);
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if (!memcmp(head, "KenSilverman", 12))
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{
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FResourceFile *rf = new FGrpFile(filename, file);
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if (rf->Open(quiet)) return rf;
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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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