mirror of
https://github.com/ZDoom/Raze.git
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141 lines
No EOL
4.3 KiB
C++
141 lines
No EOL
4.3 KiB
C++
/*
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** file_whres.cpp
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**
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** reads a Witchaven/TekWar sound resource file
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**
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**---------------------------------------------------------------------------
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** Copyright 2009-2019 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 "fs_swap.h"
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using namespace fs_private;
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//==========================================================================
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//
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// WH resource file
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//
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//==========================================================================
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class FWHResFile : public FUncompressedFile
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{
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std::string basename;
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public:
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FWHResFile(const char * filename, FileReader &file);
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bool Open(LumpFilterInfo* filter);
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};
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//==========================================================================
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//
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//
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//
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//==========================================================================
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FWHResFile::FWHResFile(const char *filename, FileReader &file)
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: FUncompressedFile(filename, file)
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{
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basename = ExtractBaseName(filename, false);
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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 FWHResFile::Open(LumpFilterInfo*)
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{
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uint32_t directory[1024];
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Reader.Seek(-4096, FileReader::SeekEnd);
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Reader.Read(directory, 4096);
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int nl =1024/3;
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Lumps.Resize(nl);
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int i = 0;
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for(int k = 0; k < nl; k++)
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{
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uint32_t offset = LittleLong(directory[k*3]) * 4096;
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uint32_t length = LittleLong(directory[k*3+1]);
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if (length == 0) break;
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char num[5];
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snprintf(num, 5, "/%04d", k);
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std::string synthname = basename + num;
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Lumps[i].LumpNameSetup(synthname.c_str());
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Lumps[i].Owner = this;
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Lumps[i].Position = offset;
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Lumps[i].LumpSize = length;
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i++;
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}
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NumLumps = i;
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Lumps.Clamp(NumLumps);
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Lumps.ShrinkToFit();
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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 *CheckWHRes(const char *filename, FileReader &file, LumpFilterInfo* filter, FileSystemMessageFunc Printf)
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{
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if (file.GetLength() >= 8192) // needs to be at least 8192 to contain one file and the directory.
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{
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unsigned directory[1024];
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int nl =1024/3;
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file.Seek(-4096, FileReader::SeekEnd);
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file.Read(directory, 4096);
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auto size = file.GetLength();
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uint32_t checkpos = 0;
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for(int k = 0; k < nl; k++)
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{
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unsigned offset = LittleLong(directory[k*3]);
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unsigned length = LittleLong(directory[k*3+1]);
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if (length <= 0 && offset == 0) break;
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if (offset != checkpos || length == 0 || offset + length >= (size_t)size - 4096 ) return nullptr;
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checkpos += (length+4095) / 4096;
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}
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auto rf = new FWHResFile(filename, file);
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if (rf->Open(filter)) return rf;
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file = std::move(rf->Reader); // to avoid destruction of reader
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delete rf;
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}
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return NULL;
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}
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