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// This file is part of par2cmdline (a PAR 2.0 compatible file verification and
// repair tool). See http://parchive.sourceforge.net for details of PAR 2.0.
//
// Copyright (c) 2003 Peter Brian Clements
//
// par2cmdline 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.
//
// par2cmdline 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 "par2cmdline.h"
#ifdef _MSC_VER
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
#endif
// Create a packet large enough for the specified number of blocks
bool VerificationPacket::Create(u32 _blockcount)
{
blockcount = _blockcount;
// Allocate a packet large enough to hold the required number of verification entries.
FILEVERIFICATIONPACKET *packet = (FILEVERIFICATIONPACKET*)AllocatePacket(sizeof(FILEVERIFICATIONPACKET) + blockcount * sizeof(FILEVERIFICATIONENTRY));
// Record everything we know in the packet.
packet->header.magic = packet_magic;
packet->header.length = packetlength;
//packet->header.hash; // Not known yet
//packet->header.setid; // Not known yet
packet->header.type = fileverificationpacket_type;
//packet->fileid; // Not known yet
//packet->entries; // Not known yet
return true;
}
void VerificationPacket::FileId(const MD5Hash &fileid)
{
assert(packetdata != 0);
// Store the fileid in the packet.
((FILEVERIFICATIONPACKET*)packetdata)->fileid = fileid;
}
void VerificationPacket::SetBlockHashAndCRC(u32 blocknumber, const MD5Hash &hash, u32 crc)
{
assert(packetdata != 0);
assert(blocknumber < blockcount);
// Store the block hash and block crc in the packet.
FILEVERIFICATIONENTRY &entry = ((FILEVERIFICATIONPACKET*)packetdata)->entries[blocknumber];
entry.hash = hash;
entry.crc = crc;
}
bool VerificationPacket::Load(DiskFile *diskfile, u64 offset, PACKET_HEADER &header)
{
// Is the packet large enough
if (header.length <= sizeof(FILEVERIFICATIONPACKET))
{
return false;
}
// Does the packet have a whole number of verification records
if (0 < ((header.length - sizeof(FILEVERIFICATIONPACKET)) % sizeof(FILEVERIFICATIONENTRY)))
{
return false;
}
// Is the packet too large
if (header.length > sizeof(FILEVERIFICATIONPACKET) + 32768 * sizeof(FILEVERIFICATIONENTRY))
{
return false;
}
// Allocate the packet
FILEVERIFICATIONPACKET *packet = (FILEVERIFICATIONPACKET*)AllocatePacket((size_t)header.length);
packet->header = header;
// How many blocks are there
blockcount = (u32)((((FILEVERIFICATIONPACKET*)packetdata)->header.length - sizeof(FILEVERIFICATIONPACKET)) / sizeof(FILEVERIFICATIONENTRY));
// Read the rest of the packet
return diskfile->Read(offset + sizeof(PACKET_HEADER),
&packet->fileid,
(size_t)packet->header.length - sizeof(PACKET_HEADER));
}
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