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- moved file system implementation to 'common'.

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Christoph Oelckers 2020-04-11 13:36:23 +02:00
commit 05d8856fe0
177 changed files with 179 additions and 177 deletions
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src/common/filesystem/file_whres.cpp Normal file
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/*
** file_whres.cpp
**
** reads a Witchaven/TekWar sound resource file
**
**---------------------------------------------------------------------------
** Copyright 2009-2019 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**
*/
#include "resourcefile.h"
#include "printf.h"
#include "cmdlib.h"
//==========================================================================
//
//
//
//==========================================================================
struct whresentry
{
int filepospage, filelen, priority;
} ;
struct dpackheader_t
{
int ident; // == IDPAKHEADER
int dirofs;
int dirlen;
} ;
//==========================================================================
//
// Wad file
//
//==========================================================================
class FWHResFile : public FUncompressedFile
{
FString basename;
public:
FWHResFile(const char * filename, FileReader &file);
bool Open(bool quiet, LumpFilterInfo* filter);
};
//==========================================================================
//
// FWadFile::FWadFile
//
// Initializes a WAD file
//
//==========================================================================
FWHResFile::FWHResFile(const char *filename, FileReader &file)
: FUncompressedFile(filename, file)
{
basename = ExtractFileBase(filename, false);
}
//==========================================================================
//
// Open it
//
//==========================================================================
bool FWHResFile::Open(bool quiet, LumpFilterInfo*)
{
int directory[1024];
Reader.Seek(-4096, FileReader::SeekEnd);
Reader.Read(directory, 4096);
int nl =1024/3;
Lumps.Resize(nl);
int i = 0;
for(int k = 0; k < nl; k++)
{
int offset = LittleLong(directory[k*3]) * 4096;
int length = LittleLong(directory[k*3+1]);
if (length <= 0) break;
FStringf synthname("%s/%04d", basename.GetChars(), k);
Lumps[i].LumpNameSetup(synthname);
Lumps[i].Owner = this;
Lumps[i].Position = offset;
Lumps[i].LumpSize = length;
i++;
}
NumLumps = i;
Lumps.Clamp(NumLumps);
Lumps.ShrinkToFit();
return true;
}
//==========================================================================
//
// File open
//
//==========================================================================
FResourceFile *CheckWHRes(const char *filename, FileReader &file, bool quiet, LumpFilterInfo* filter)
{
if (file.GetLength() >= 8192) // needs to be at least 8192 to contain one file and the directory.
{
int directory[1024];
int nl =1024/3;
file.Seek(-4096, FileReader::SeekEnd);
file.Read(directory, 4096);
int checkpos = 0;
for(int k = 0; k < nl; k++)
{
int offset = LittleLong(directory[k*3]);
int length = LittleLong(directory[k*3+1]);
if (length <= 0 && offset == 0) break;
if (offset != checkpos || length <= 0) return nullptr;
checkpos += (length+4095) / 4096;
}
FResourceFile *rf = new FWHResFile(filename, file);
if (rf->Open(quiet, filter)) return rf;
file = std::move(rf->Reader); // to avoid destruction of reader
delete rf;
}
return NULL;
}