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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_VCL_INC_CHECKSUM_HXX
#define INCLUDED_VCL_INC_CHECKSUM_HXX
#include <sal/config.h>
#include <sal/types.h>
#include <vcl/dllapi.h>
#define BITMAP_CHECKSUM_SIZE 8
typedef sal_uInt64 BitmapChecksum;
typedef sal_uInt8 BitmapChecksumOctetArray[BITMAP_CHECKSUM_SIZE];
template< sal_uInt8 N = 0 >
inline void BCToBCOA( BitmapChecksum n, BitmapChecksumOctetArray p )
{
p[N] = static_cast<sal_uInt8>(n >> ( 8 * N ));
return BCToBCOA< N + 1 >( n, p );
}
template<>
inline void BCToBCOA< BITMAP_CHECKSUM_SIZE >( BitmapChecksum, BitmapChecksumOctetArray )
{
return;
}
extern "C" {
/*========================================================================
*
* vcl_crc64 interface.
*
*======================================================================*/
/** Evaluate CRC64 over given data.
This function evaluates the CRC polynomial 0xEDB88320.
@param Crc [in] CRC64 over previous data or zero.
@param Data [in] data buffer.
@param DatLen [in] data buffer length.
@return new CRC64 value.
*/
VCL_DLLPUBLIC sal_uInt64 vcl_crc64 (
sal_uInt64 Crc,
const void *Data, sal_uInt32 DatLen
) SAL_THROW_EXTERN_C();
const sal_uInt64* vcl_get_crc64_table();
}
inline BitmapChecksum vcl_get_checksum (
BitmapChecksum Checksum,
const void *Data,
sal_uInt32 DatLen
)
{
return static_cast<BitmapChecksum>(vcl_crc64( Checksum, Data, DatLen ));
}
#endif // INCLUDED_VCL_INC_CHECKSUM_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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