mirror of https://github.com/vitalif/zbackup
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
// Copyright (c) 2012-2014 Konstantin Isakov <ikm@zbackup.org> and ZBackup contributors, see CONTRIBUTORS
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// Part of ZBackup. Licensed under GNU GPLv2 or later + OpenSSL, see LICENSE
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#include "chunk_id.hh"
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#include <string.h>
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#include "endian.hh"
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#include "check.hh"
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string ChunkId::toBlob() const
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{
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string out( BlobSize, 0 );
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toBlob( &out[ 0 ] );
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return out;
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}
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void ChunkId::toBlob( void * outPtr ) const
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{
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char * out = ( char * ) outPtr;
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RollingHash::Digest v = toLittleEndian( rollingHash );
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memcpy( out, cryptoHash, sizeof( cryptoHash ) );
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memcpy( out + sizeof( cryptoHash ), &v, sizeof( v ) );
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}
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void ChunkId::setFromBlob( void const * data )
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{
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char const * blob = ( char const * ) data;
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RollingHash::Digest v;
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memcpy( cryptoHash, blob, sizeof( cryptoHash ) );
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memcpy( &v, blob + sizeof( cryptoHash ), sizeof( v ) );
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rollingHash = fromLittleEndian( v );
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}
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bool operator <( const ChunkId &lhs, const ChunkId &rhs )
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{
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int r = memcmp( &lhs.cryptoHash, &rhs.cryptoHash, sizeof( lhs.cryptoHash ) );
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if ( r != 0 )
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return r < 0;
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return memcmp( &lhs.rollingHash, &rhs.rollingHash, sizeof( lhs.rollingHash ) ) < 0;
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}
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ChunkId::ChunkId( string const & blob )
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{
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CHECK( blob.size() == BlobSize, "incorrect blob size: %zu", blob.size() );
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setFromBlob( blob.data() );
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}
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