gzdoom/src/resourcefiles/file_7z.cpp

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/*
** file_7z.cpp
**
**---------------------------------------------------------------------------
** Copyright 2009 Randy Heit
** Copyright 2009 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 "cmdlib.h"
#include "templates.h"
#include "v_text.h"
#include "w_zip.h"
#include "i_system.h"
#include "w_wad.h"
extern "C" {
#include "Archive/7z/7zHeader.h"
#include "Archive/7z/7zExtract.h"
#include "Archive/7z/7zIn.h"
#include "7zCrc.h"
}
//-----------------------------------------------------------------------
//
// Interface classes to 7z library
//
//-----------------------------------------------------------------------
extern ISzAlloc g_Alloc;
struct CZDFileInStream
{
ISeekInStream s;
FileReader *File;
CZDFileInStream(FileReader *_file)
{
s.Read = Read;
s.Seek = Seek;
File = _file;
}
static SRes Read(void *pp, void *buf, size_t *size)
{
CZDFileInStream *p = (CZDFileInStream *)pp;
long numread = p->File->Read(buf, (long)*size);
if (numread < 0)
{
*size = 0;
return SZ_ERROR_READ;
}
*size = numread;
return SZ_OK;
}
static SRes Seek(void *pp, Int64 *pos, ESzSeek origin)
{
CZDFileInStream *p = (CZDFileInStream *)pp;
int move_method;
int res;
if (origin == SZ_SEEK_SET)
{
move_method = SEEK_SET;
}
else if (origin == SZ_SEEK_CUR)
{
move_method = SEEK_CUR;
}
else if (origin == SZ_SEEK_END)
{
move_method = SEEK_END;
}
else
{
return 1;
}
res = p->File->Seek((long)*pos, move_method);
*pos = p->File->Tell();
return res;
}
};
struct C7zArchive
{
CSzArEx DB;
CZDFileInStream ArchiveStream;
CLookToRead LookStream;
UInt32 BlockIndex;
Byte *OutBuffer;
size_t OutBufferSize;
C7zArchive(FileReader *file) : ArchiveStream(file)
{
if (g_CrcTable[1] == 0)
{
CrcGenerateTable();
}
file->Seek(0, SEEK_SET);
LookToRead_CreateVTable(&LookStream, false);
LookStream.realStream = &ArchiveStream.s;
LookToRead_Init(&LookStream);
SzArEx_Init(&DB);
BlockIndex = 0xFFFFFFFF;
OutBuffer = NULL;
OutBufferSize = 0;
}
~C7zArchive()
{
if (OutBuffer != NULL)
{
IAlloc_Free(&g_Alloc, OutBuffer);
}
SzArEx_Free(&DB, &g_Alloc);
}
SRes Open()
{
return SzArEx_Open(&DB, &LookStream.s, &g_Alloc, &g_Alloc);
}
SRes Extract(UInt32 file_index, char *buffer)
{
size_t offset, out_size_processed;
SRes res = SzAr_Extract(&DB, &LookStream.s, file_index,
&BlockIndex, &OutBuffer, &OutBufferSize,
&offset, &out_size_processed,
&g_Alloc, &g_Alloc);
if (res == SZ_OK)
{
memcpy(buffer, OutBuffer + offset, out_size_processed);
}
return res;
}
};
//==========================================================================
//
// Zip Lump
//
//==========================================================================
struct F7ZLump : public FResourceLump
{
int Position;
virtual int FillCache();
};
//==========================================================================
//
// Zip file
//
//==========================================================================
class F7ZFile : public FResourceFile
{
friend struct F7ZLump;
F7ZLump *Lumps;
C7zArchive *Archive;
static int STACK_ARGS lumpcmp(const void * a, const void * b);
public:
F7ZFile(const char * filename, FileReader *filer);
bool Open(bool quiet);
virtual ~F7ZFile();
virtual FResourceLump *GetLump(int no) { return ((unsigned)no < NumLumps)? &Lumps[no] : NULL; }
};
int STACK_ARGS F7ZFile::lumpcmp(const void * a, const void * b)
{
F7ZLump * rec1 = (F7ZLump *)a;
F7ZLump * rec2 = (F7ZLump *)b;
return stricmp(rec1->FullName, rec2->FullName);
}
//==========================================================================
//
// 7Z file
//
//==========================================================================
F7ZFile::F7ZFile(const char * filename, FileReader *filer)
: FResourceFile(filename, filer)
{
Lumps = NULL;
Archive = NULL;
}
//==========================================================================
//
// Open it
//
//==========================================================================
bool F7ZFile::Open(bool quiet)
{
Archive = new C7zArchive(Reader);
int skipped = 0;
SRes res;
res = Archive->Open();
if (res != SZ_OK)
{
delete Archive;
Archive = NULL;
if (!quiet)
{
Printf("\n"TEXTCOLOR_RED"%s: ", Filename);
if (res == SZ_ERROR_UNSUPPORTED)
{
Printf("Decoder does not support this archive\n");
}
else if (res == SZ_ERROR_MEM)
{
Printf("Cannot allocate memory\n");
}
else if (res == SZ_ERROR_CRC)
{
Printf("CRC error\n");
}
else
{
Printf("error #%d\n", res);
}
}
return false;
}
NumLumps = Archive->DB.db.NumFiles;
Lumps = new F7ZLump[NumLumps];
F7ZLump *lump_p = Lumps;
for (DWORD i = 0; i < NumLumps; ++i)
{
CSzFileItem *file = &Archive->DB.db.Files[i];
char name[256];
// skip Directories
if (file->IsDir)
{
skipped++;
continue;
}
strncpy(name, file->Name, countof(name)-1);
name[countof(name)-1] = 0;
FixPathSeperator(name);
strlwr(name);
lump_p->LumpNameSetup(name);
lump_p->LumpSize = int(file->Size);
lump_p->Owner = this;
lump_p->Flags = LUMPF_ZIPFILE;
lump_p->Position = i;
lump_p->CheckEmbedded();
lump_p++;
}
// Resize the lump record array to its actual size
NumLumps -= skipped;
if (!quiet) Printf(", %d lumps\n", NumLumps);
// Entries in archives are sorted alphabetically
qsort(&Lumps[0], NumLumps, sizeof(F7ZLump), lumpcmp);
return true;
}
//==========================================================================
//
//
//
//==========================================================================
F7ZFile::~F7ZFile()
{
if (Lumps != NULL)
{
delete[] Lumps;
}
if (Archive != NULL)
{
delete Archive;
}
}
//==========================================================================
//
// Fills the lump cache and performs decompression
//
//==========================================================================
int F7ZLump::FillCache()
{
Cache = new char[LumpSize];
static_cast<F7ZFile*>(Owner)->Archive->Extract(Position, Cache);
RefCount = 1;
return 1;
}
//==========================================================================
//
// File open
//
//==========================================================================
FResourceFile *Check7Z(const char *filename, FileReader *file, bool quiet)
{
char head[k7zSignatureSize];
if (file->GetLength() >= k7zSignatureSize)
{
file->Seek(0, SEEK_SET);
file->Read(&head, k7zSignatureSize);
file->Seek(0, SEEK_SET);
if (!memcmp(head, k7zSignature, k7zSignatureSize))
{
FResourceFile *rf = new F7ZFile(filename, file);
if (rf->Open(quiet)) return rf;
delete rf;
}
}
return NULL;
}