include/vcl/checksum.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
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   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #ifndef INCLUDED_VCL_INC_CHECKSUM_HXX
  22 #define INCLUDED_VCL_INC_CHECKSUM_HXX
  23
  24 #include <sal/config.h>
  25 #include <sal/types.h>
  26 #include <tools/solar.h>
  27 #include <vcl/dllapi.h>
  28
  29 #include <boost/preprocessor/arithmetic/inc.hpp>
  30 #include <boost/preprocessor/arithmetic/mul.hpp>
  31 #include <boost/preprocessor/repetition/repeat_from_to.hpp>
  32
  33 #define BITMAP_CHECKSUM_SIZE 8
  34 #define BITMAP_CHECKSUM_BITS BOOST_PP_MUL(BITMAP_CHECKSUM_SIZE, 8)
  35
  36 typedef sal_uInt64   BitmapChecksum;
  37 typedef sal_uInt8   BitmapChecksumOctetArray[BITMAP_CHECKSUM_SIZE];
  38
  39 #define BITMAP_CHECKSUM_SET_OCTET(z, i, unused) \
  40 p[i] = (sal_uInt8)(n >> BOOST_PP_MUL(8, i));
  41
  42
  43 inline void BCToBCOA( BitmapChecksum n , BitmapChecksumOctetArray p )
  44 {
  45     BOOST_PP_REPEAT(BITMAP_CHECKSUM_SIZE , BITMAP_CHECKSUM_SET_OCTET, unused)
  46 }
  47
  48 #ifdef __cplusplus
  49 extern "C" {
  50 #endif
  51
  52 /*========================================================================
  53  *
  54  * vcl_crc64 interface.
  55  *
  56  *======================================================================*/
  57 /** Evaluate CRC64 over given data.
  58
  59     This function evaluates the CRC polynomial 0xEDB88320.
  60
  61     @param  Crc    [in] CRC64 over previous data or zero.
  62     @param  Data   [in] data buffer.
  63     @param  DatLen [in] data buffer length.
  64     @return new CRC64 value.
  65  */
  66 VCL_DLLPUBLIC sal_uInt64 SAL_CALL vcl_crc64 (
  67     sal_uInt64  Crc,
  68     const void *Data, sal_uInt32 DatLen
  69 )   SAL_THROW_EXTERN_C();
  70
  71
  72
  73 VCL_DLLPUBLIC const sal_uInt64* vcl_get_crc64_table();
  74
  75
  76 #ifdef __cplusplus
  77 }
  78 #endif
  79
  80 inline BitmapChecksum vcl_get_checksum (
  81     BitmapChecksum  Checksum,
  82     const void *Data,
  83     sal_uInt32 DatLen
  84 )
  85 {
  86     return (BitmapChecksum)(vcl_crc64( Checksum, Data, DatLen ));
  87 }
  88
  89
  90 #endif // INCLUDED_VCL_INC_CHECKSUM_HXX
  91
  92 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */