You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
269 lines
6.3 KiB
269 lines
6.3 KiB
/***************************************************************************
|
|
* Copyright (C) 2005 by Joris Guisson *
|
|
* joris.guisson@gmail.com *
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* This program is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* GNU General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU General Public License *
|
|
* along with this program; if not, write to the *
|
|
* Free Software Foundation, Inc., *
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
|
|
***************************************************************************/
|
|
#include <klocale.h>
|
|
#include <util/file.h>
|
|
#include <util/error.h>
|
|
#include <util/fileops.h>
|
|
#include <util/sha1hash.h>
|
|
#include "dndfile.h"
|
|
|
|
namespace bt
|
|
{
|
|
const Uint32 DND_FILE_HDR_MAGIC = 0xD1234567;
|
|
|
|
struct DNDFileHeader
|
|
{
|
|
Uint32 magic;
|
|
Uint32 first_size;
|
|
Uint32 last_size;
|
|
Uint8 data_sha1[20];
|
|
};
|
|
|
|
DNDFile::DNDFile(const QString & path) : path(path)
|
|
{}
|
|
|
|
|
|
DNDFile::~DNDFile()
|
|
{}
|
|
|
|
void DNDFile::changePath(const QString & npath)
|
|
{
|
|
path = npath;
|
|
}
|
|
|
|
void DNDFile::checkIntegrity()
|
|
{
|
|
File fptr;
|
|
if (!fptr.open(path,"rb"))
|
|
{
|
|
create();
|
|
return;
|
|
}
|
|
|
|
DNDFileHeader hdr;
|
|
if (fptr.read(&hdr,sizeof(DNDFileHeader)) != sizeof(DNDFileHeader))
|
|
{
|
|
create();
|
|
return;
|
|
}
|
|
|
|
if (hdr.magic != DND_FILE_HDR_MAGIC && bt::FileSize(path) != sizeof(DNDFileHeader) + hdr.first_size + hdr.last_size)
|
|
{
|
|
create();
|
|
return;
|
|
}
|
|
|
|
#if 0
|
|
if (hdr.first_size > 0 || hdr.last_size > 0)
|
|
{
|
|
// check hash
|
|
Uint32 data_size = hdr.first_size + hdr.last_size;
|
|
Uint8* buf = new Uint8[data_size];
|
|
if (fptr.read(buf,data_size) != data_size)
|
|
{
|
|
delete [] buf;
|
|
create();
|
|
return;
|
|
}
|
|
|
|
if (SHA1Hash::generate(buf,data_size) != SHA1Hash(hdr.data_sha1))
|
|
{
|
|
delete [] buf;
|
|
create();
|
|
return;
|
|
}
|
|
|
|
delete [] buf;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void DNDFile::create()
|
|
{
|
|
DNDFileHeader hdr;
|
|
hdr.magic = DND_FILE_HDR_MAGIC;
|
|
hdr.first_size = 0;
|
|
hdr.last_size = 0;
|
|
memset(hdr.data_sha1,0,20);
|
|
|
|
File fptr;
|
|
if (!fptr.open(path,"wb"))
|
|
throw Error(i18n("Cannot create file %1 : %2").arg(path).arg(fptr.errorString()));
|
|
|
|
fptr.write(&hdr,sizeof(DNDFileHeader));
|
|
fptr.close();
|
|
}
|
|
|
|
|
|
|
|
Uint32 DNDFile::readFirstChunk(Uint8* buf,Uint32 off,Uint32 buf_size)
|
|
{
|
|
File fptr;
|
|
if (!fptr.open(path,"rb"))
|
|
{
|
|
create();
|
|
return 0;
|
|
}
|
|
|
|
DNDFileHeader hdr;
|
|
if (fptr.read(&hdr,sizeof(DNDFileHeader)) != sizeof(DNDFileHeader))
|
|
{
|
|
create();
|
|
return 0;
|
|
}
|
|
|
|
if (hdr.first_size == 0)
|
|
return 0;
|
|
|
|
if (hdr.first_size + off > buf_size)
|
|
return 0;
|
|
|
|
return fptr.read(buf + off,hdr.first_size);
|
|
}
|
|
|
|
Uint32 DNDFile::readLastChunk(Uint8* buf,Uint32 off,Uint32 buf_size)
|
|
{
|
|
File fptr;
|
|
if (!fptr.open(path,"rb"))
|
|
{
|
|
create();
|
|
return 0;
|
|
}
|
|
|
|
DNDFileHeader hdr;
|
|
if (fptr.read(&hdr,sizeof(DNDFileHeader)) != sizeof(DNDFileHeader))
|
|
{
|
|
create();
|
|
return 0;
|
|
}
|
|
|
|
if (hdr.last_size == 0)
|
|
return 0;
|
|
|
|
if (hdr.last_size + off > buf_size)
|
|
return 0;
|
|
|
|
fptr.seek(File::BEGIN,sizeof(DNDFileHeader) + hdr.first_size);
|
|
return fptr.read(buf + off,hdr.last_size);
|
|
}
|
|
|
|
void DNDFile::writeFirstChunk(const Uint8* buf,Uint32 fc_size)
|
|
{
|
|
File fptr;
|
|
if (!fptr.open(path,"r+b"))
|
|
{
|
|
create();
|
|
if (!fptr.open(path,"r+b"))
|
|
{
|
|
throw Error(i18n("Failed to write first chunk to DND file : %1").arg(fptr.errorString()));
|
|
}
|
|
}
|
|
|
|
DNDFileHeader hdr;
|
|
fptr.read(&hdr,sizeof(DNDFileHeader));
|
|
if (hdr.last_size == 0)
|
|
{
|
|
hdr.first_size = fc_size;
|
|
fptr.seek(File::BEGIN,0);
|
|
// update hash first
|
|
// SHA1Hash h = SHA1Hash::generate(buf,fc_size);
|
|
// memcpy(hdr.data_sha1,h.getData(),20);
|
|
// write header
|
|
fptr.write(&hdr,sizeof(DNDFileHeader));
|
|
// write data
|
|
fptr.write(buf,fc_size);
|
|
}
|
|
else
|
|
{
|
|
hdr.first_size = fc_size;
|
|
Uint8* tmp = new Uint8[hdr.first_size + hdr.last_size];
|
|
try
|
|
{
|
|
|
|
// put everything in tmp buf
|
|
memcpy(tmp,buf,hdr.first_size);
|
|
fptr.seek(File::BEGIN,sizeof(DNDFileHeader) + hdr.first_size);
|
|
fptr.read(tmp + hdr.first_size,hdr.last_size);
|
|
|
|
// update the hash of the header
|
|
// SHA1Hash h = SHA1Hash::generate(tmp,hdr.first_size + hdr.last_size);
|
|
// memcpy(hdr.data_sha1,h.getData(),20);
|
|
|
|
// write header + data
|
|
fptr.seek(File::BEGIN,0);
|
|
fptr.write(&hdr,sizeof(DNDFileHeader));
|
|
fptr.write(tmp,hdr.first_size + hdr.last_size);
|
|
delete [] tmp;
|
|
|
|
}
|
|
catch (...)
|
|
{
|
|
delete [] tmp;
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void DNDFile::writeLastChunk(const Uint8* buf,Uint32 lc_size)
|
|
{
|
|
File fptr;
|
|
if (!fptr.open(path,"r+b"))
|
|
{
|
|
create();
|
|
if (!fptr.open(path,"r+b"))
|
|
{
|
|
throw Error(i18n("Failed to write last chunk to DND file : %1").arg(fptr.errorString()));
|
|
}
|
|
}
|
|
|
|
DNDFileHeader hdr;
|
|
fptr.read(&hdr,sizeof(DNDFileHeader));
|
|
hdr.last_size = lc_size;
|
|
Uint8* tmp = new Uint8[hdr.first_size + hdr.last_size];
|
|
try
|
|
{
|
|
// put everything in tmp buf
|
|
memcpy(tmp + hdr.first_size,buf,lc_size);
|
|
if (hdr.first_size > 0)
|
|
{
|
|
fptr.seek(File::BEGIN,sizeof(DNDFileHeader));
|
|
fptr.read(tmp,hdr.first_size);
|
|
}
|
|
|
|
// update the hash of the header
|
|
// SHA1Hash h = SHA1Hash::generate(tmp,hdr.first_size + hdr.last_size);
|
|
// memcpy(hdr.data_sha1,h.getData(),20);
|
|
|
|
// write header + data
|
|
fptr.seek(File::BEGIN,0);
|
|
fptr.write(&hdr,sizeof(DNDFileHeader));
|
|
fptr.write(tmp,hdr.first_size + hdr.last_size);
|
|
delete [] tmp;
|
|
}
|
|
catch (...)
|
|
{
|
|
delete [] tmp;
|
|
throw;
|
|
}
|
|
}
|
|
|
|
}
|