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@@ -1,5 +1,7 @@
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unit crc;
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unit crc;
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+{$mode objfpc}
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+
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{
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{
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crc32.c -- compute the CRC-32 of a data stream
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crc32.c -- compute the CRC-32 of a data stream
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Copyright (C) 1995-1998 Mark Adler
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Copyright (C) 1995-1998 Mark Adler
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@@ -7,11 +9,25 @@ unit crc;
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Pascal tranlastion
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Pascal tranlastion
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Copyright (C) 1998 by Jacques Nomssi Nzali
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Copyright (C) 1998 by Jacques Nomssi Nzali
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For conditions of distribution and use, see copyright notice in readme.txt
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For conditions of distribution and use, see copyright notice in readme.txt
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+
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+
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+ crc64.c -- compute the CRC-64 of a data stream
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+ By David T. Jones ([email protected]) - September 28th 2002
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+
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+ Pascal tranlastion
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+ Copyright (C) 2009 by Ivo Steinmann
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}
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}
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+{.$DEFINE DYNAMIC_CRC_TABLE}
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+
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interface
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interface
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-function crc32(crc : cardinal; buf : Pbyte; len : cardinal) : cardinal;
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+
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+(******************************************************************************
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+ * CRC32
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+ ******************************************************************************)
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+
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+function crc32(crc: cardinal; buf: Pbyte; len: cardinal): cardinal;
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{ Update a running crc with the bytes buf[0..len-1] and return the updated
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{ Update a running crc with the bytes buf[0..len-1] and return the updated
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crc. If buf is NULL, this function returns the required initial value
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crc. If buf is NULL, this function returns the required initial value
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@@ -32,19 +48,33 @@ function crc32(crc : cardinal; buf : Pbyte; len : cardinal) : cardinal;
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}
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}
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-function get_crc_table : Pcardinal; { can be used by asm versions of crc32() }
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+function get_crc32_table: Pcardinal; { can be used by asm versions of crc32() }
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+
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+(******************************************************************************
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+ * CRC64
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+ ******************************************************************************)
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+
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+function crc64(crc: qword; buf: Pbyte; len: cardinal) : qword;
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+
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+function get_crc64_table: PQword; { can be used by asm versions of crc64() }
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+
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implementation
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implementation
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+
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+(******************************************************************************
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+ * CRC32
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+ ******************************************************************************)
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+
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{$IFDEF DYNAMIC_CRC_TABLE}
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{$IFDEF DYNAMIC_CRC_TABLE}
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{local}
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{local}
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const
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const
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- crc_table_empty : boolean = TRUE;
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+ crc32_table_empty : boolean = TRUE;
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{local}
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{local}
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var
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var
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- crc_table : array[0..256-1] of uLongf;
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+ crc32_table : array[Byte] of Longword;
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{
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{
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@@ -72,7 +102,7 @@ var
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combinations of CRC register values and incoming bytes.
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combinations of CRC register values and incoming bytes.
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}
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}
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{local}
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{local}
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-procedure make_crc_table;
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+procedure make_crc32_table;
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var
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var
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c : cardinal;
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c : cardinal;
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n,k : integer;
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n,k : integer;
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@@ -98,19 +128,19 @@ begin
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else
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else
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c := (c shr 1);
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c := (c shr 1);
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end;
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end;
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- crc_table[n] := c;
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+ crc32_table[n] := c;
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end;
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end;
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- crc_table_empty := FALSE;
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+ crc32_table_empty := FALSE;
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end;
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end;
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{$ELSE}
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{$ELSE}
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{ ========================================================================
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{ ========================================================================
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- Table of CRC-32's of all single-byte values (made by make_crc_table) }
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+ Table of CRC-32's of all single-byte values (made by make_crc32_table) }
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{local}
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{local}
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const
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const
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- crc_table : array[0..256-1] of cardinal = (
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+ crc32_table : array[Byte] of cardinal = (
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$00000000, $77073096, $ee0e612c, $990951ba, $076dc419,
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$00000000, $77073096, $ee0e612c, $990951ba, $076dc419,
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$706af48f, $e963a535, $9e6495a3, $0edb8832, $79dcb8a4,
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$706af48f, $e963a535, $9e6495a3, $0edb8832, $79dcb8a4,
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$e0d5e91e, $97d2d988, $09b64c2b, $7eb17cbd, $e7b82d07,
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$e0d5e91e, $97d2d988, $09b64c2b, $7eb17cbd, $e7b82d07,
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@@ -169,63 +199,224 @@ const
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{ =========================================================================
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{ =========================================================================
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This function can be used by asm versions of crc32() }
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This function can be used by asm versions of crc32() }
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-function get_crc_table : {const} Pcardinal;
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+function get_crc32_table : {const} Pcardinal;
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begin
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begin
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{$ifdef DYNAMIC_CRC_TABLE}
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{$ifdef DYNAMIC_CRC_TABLE}
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- if (crc_table_empty) then
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- make_crc_table;
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+ if (crc32_table_empty) then
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+ make_crc32_table;
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{$endif}
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{$endif}
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- get_crc_table := {const} Pcardinal(@crc_table);
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+ get_crc32_table := {const} Pcardinal(@crc32_table);
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end;
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end;
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{ ========================================================================= }
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{ ========================================================================= }
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function crc32 (crc : cardinal; buf : Pbyte; len : cardinal): cardinal;
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function crc32 (crc : cardinal; buf : Pbyte; len : cardinal): cardinal;
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begin
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begin
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- if (buf = nil) then
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- crc32 := 0
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- else
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- begin
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+ if buf = nil then
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+ exit(0);
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{$IFDEF DYNAMIC_CRC_TABLE}
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{$IFDEF DYNAMIC_CRC_TABLE}
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- if crc_table_empty then
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- make_crc_table;
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+ if crc32_table_empty then
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+ make_crc32_table;
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{$ENDIF}
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{$ENDIF}
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- crc := crc xor cardinal($ffffffff);
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- while (len >= 8) do
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+ crc := crc xor cardinal($ffffffff);
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+ while (len >= 8) do
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+ begin
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ dec(len, 8);
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+ end;
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+
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+ if (len <> 0) then
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+ repeat
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+ crc := crc32_table[(crc xor buf^) and $ff] xor (crc shr 8);
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+ inc(buf);
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+ dec(len);
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+ until (len = 0);
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+
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+ result := crc xor cardinal($ffffffff);
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+end;
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+
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+
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+
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+(******************************************************************************
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+ * CRC64
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+ ******************************************************************************)
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+
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+const
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+ POLY64REV = QWord($95AC9329AC4BC9B5);
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+ INITIALCRC = QWord($FFFFFFFFFFFFFFFF);
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+
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+{$IFDEF DYNAMIC_CRC_TABLE}
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+
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+{local}
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+const
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+ crc64_table_empty : boolean = TRUE;
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+{local}
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+var
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+ crc64_table : array[Byte] of QWord;
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+
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+{local}
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+procedure make_crc64_table;
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+var
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+ i,j: Integer;
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+ part: QWord;
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+begin
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+ for i := 0 to 255 do
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+ begin
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+ part := i;
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+ for j := 0 to 7 do
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begin
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begin
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- {DO8(buf)}
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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-
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- dec(len, 8);
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+ if part and $1 <> 0 then
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+ part := (part shr 1) xor POLY64REV
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+ else
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+ part := part shr 1;
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end;
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end;
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- if (len <> 0) then
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- repeat
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- {DO1(buf)}
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- crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
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- inc(buf);
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-
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- dec(len);
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- until (len = 0);
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- crc32 := crc xor cardinal($ffffffff);
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+ crc64_table[i] := part;
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end;
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end;
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+ crc64_table_empty := FALSE;
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+end;
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+
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+{$ELSE}
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+
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+{ ========================================================================
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+ Table of CRC-64's of all single-byte values (made by make_crc64_table) }
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+
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+{local}
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+const
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+ crc64_table : array[Byte] of QWord = (
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+ $0000000000000000,$7AD870C830358979,$F5B0E190606B12F2,$8F689158505E9B8B,$C038E5739841B68F,$BAE095BBA8743FF6,
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+ $358804E3F82AA47D,$4F50742BC81F2D04,$AB28ECB46814FE75,$D1F09C7C5821770C,$5E980D24087FEC87,$24407DEC384A65FE,
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+ $6B1009C7F05548FA,$11C8790FC060C183,$9EA0E857903E5A08,$E478989FA00BD371,$7D08FF3B88BE6F81,$07D08FF3B88BE6F8,
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+ $88B81EABE8D57D73,$F2606E63D8E0F40A,$BD301A4810FFD90E,$C7E86A8020CA5077,$4880FBD87094CBFC,$32588B1040A14285,
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+ $D620138FE0AA91F4,$ACF86347D09F188D,$2390F21F80C18306,$594882D7B0F40A7F,$1618F6FC78EB277B,$6CC0863448DEAE02,
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+ $E3A8176C18803589,$997067A428B5BCF0,$FA11FE77117CDF02,$80C98EBF2149567B,$0FA11FE77117CDF0,$75796F2F41224489,
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+ $3A291B04893D698D,$40F16BCCB908E0F4,$CF99FA94E9567B7F,$B5418A5CD963F206,$513912C379682177,$2BE1620B495DA80E,
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+ $A489F35319033385,$DE51839B2936BAFC,$9101F7B0E12997F8,$EBD98778D11C1E81,$64B116208142850A,$1E6966E8B1770C73,
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+ $8719014C99C2B083,$FDC17184A9F739FA,$72A9E0DCF9A9A271,$08719014C99C2B08,$4721E43F0183060C,$3DF994F731B68F75,
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+ $B29105AF61E814FE,$C849756751DD9D87,$2C31EDF8F1D64EF6,$56E99D30C1E3C78F,$D9810C6891BD5C04,$A3597CA0A188D57D,
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+ $EC09088B6997F879,$96D1784359A27100,$19B9E91B09FCEA8B,$636199D339C963F2,$DF7ADABD7A6E2D6F,$A5A2AA754A5BA416,
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+ $2ACA3B2D1A053F9D,$50124BE52A30B6E4,$1F423FCEE22F9BE0,$659A4F06D21A1299,$EAF2DE5E82448912,$902AAE96B271006B,
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+ $74523609127AD31A,$0E8A46C1224F5A63,$81E2D7997211C1E8,$FB3AA75142244891,$B46AD37A8A3B6595,$CEB2A3B2BA0EECEC,
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+ $41DA32EAEA507767,$3B024222DA65FE1E,$A2722586F2D042EE,$D8AA554EC2E5CB97,$57C2C41692BB501C,$2D1AB4DEA28ED965,
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+ $624AC0F56A91F461,$1892B03D5AA47D18,$97FA21650AFAE693,$ED2251AD3ACF6FEA,$095AC9329AC4BC9B,$7382B9FAAAF135E2,
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+ $FCEA28A2FAAFAE69,$8632586ACA9A2710,$C9622C4102850A14,$B3BA5C8932B0836D,$3CD2CDD162EE18E6,$460ABD1952DB919F,
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+ $256B24CA6B12F26D,$5FB354025B277B14,$D0DBC55A0B79E09F,$AA03B5923B4C69E6,$E553C1B9F35344E2,$9F8BB171C366CD9B,
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+ $10E3202993385610,$6A3B50E1A30DDF69,$8E43C87E03060C18,$F49BB8B633338561,$7BF329EE636D1EEA,$012B592653589793,
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+ $4E7B2D0D9B47BA97,$34A35DC5AB7233EE,$BBCBCC9DFB2CA865,$C113BC55CB19211C,$5863DBF1E3AC9DEC,$22BBAB39D3991495,
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+ $ADD33A6183C78F1E,$D70B4AA9B3F20667,$985B3E827BED2B63,$E2834E4A4BD8A21A,$6DEBDF121B863991,$1733AFDA2BB3B0E8,
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+ $F34B37458BB86399,$8993478DBB8DEAE0,$06FBD6D5EBD3716B,$7C23A61DDBE6F812,$3373D23613F9D516,$49ABA2FE23CC5C6F,
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+ $C6C333A67392C7E4,$BC1B436E43A74E9D,$95AC9329AC4BC9B5,$EF74E3E19C7E40CC,$601C72B9CC20DB47,$1AC40271FC15523E,
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+ $5594765A340A7F3A,$2F4C0692043FF643,$A02497CA54616DC8,$DAFCE7026454E4B1,$3E847F9DC45F37C0,$445C0F55F46ABEB9,
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+ $CB349E0DA4342532,$B1ECEEC59401AC4B,$FEBC9AEE5C1E814F,$8464EA266C2B0836,$0B0C7B7E3C7593BD,$71D40BB60C401AC4,
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+ $E8A46C1224F5A634,$927C1CDA14C02F4D,$1D148D82449EB4C6,$67CCFD4A74AB3DBF,$289C8961BCB410BB,$5244F9A98C8199C2,
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+ $DD2C68F1DCDF0249,$A7F41839ECEA8B30,$438C80A64CE15841,$3954F06E7CD4D138,$B63C61362C8A4AB3,$CCE411FE1CBFC3CA,
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+ $83B465D5D4A0EECE,$F96C151DE49567B7,$76048445B4CBFC3C,$0CDCF48D84FE7545,$6FBD6D5EBD3716B7,$15651D968D029FCE,
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|
+ $9A0D8CCEDD5C0445,$E0D5FC06ED698D3C,$AF85882D2576A038,$D55DF8E515432941,$5A3569BD451DB2CA,$20ED197575283BB3,
|
|
|
|
+ $C49581EAD523E8C2,$BE4DF122E51661BB,$3125607AB548FA30,$4BFD10B2857D7349,$04AD64994D625E4D,$7E7514517D57D734,
|
|
|
|
+ $F11D85092D094CBF,$8BC5F5C11D3CC5C6,$12B5926535897936,$686DE2AD05BCF04F,$E70573F555E26BC4,$9DDD033D65D7E2BD,
|
|
|
|
+ $D28D7716ADC8CFB9,$A85507DE9DFD46C0,$273D9686CDA3DD4B,$5DE5E64EFD965432,$B99D7ED15D9D8743,$C3450E196DA80E3A,
|
|
|
|
+ $4C2D9F413DF695B1,$36F5EF890DC31CC8,$79A59BA2C5DC31CC,$037DEB6AF5E9B8B5,$8C157A32A5B7233E,$F6CD0AFA9582AA47,
|
|
|
|
+ $4AD64994D625E4DA,$300E395CE6106DA3,$BF66A804B64EF628,$C5BED8CC867B7F51,$8AEEACE74E645255,$F036DC2F7E51DB2C,
|
|
|
|
+ $7F5E4D772E0F40A7,$05863DBF1E3AC9DE,$E1FEA520BE311AAF,$9B26D5E88E0493D6,$144E44B0DE5A085D,$6E963478EE6F8124,
|
|
|
|
+ $21C640532670AC20,$5B1E309B16452559,$D476A1C3461BBED2,$AEAED10B762E37AB,$37DEB6AF5E9B8B5B,$4D06C6676EAE0222,
|
|
|
|
+ $C26E573F3EF099A9,$B8B627F70EC510D0,$F7E653DCC6DA3DD4,$8D3E2314F6EFB4AD,$0256B24CA6B12F26,$788EC2849684A65F,
|
|
|
|
+ $9CF65A1B368F752E,$E62E2AD306BAFC57,$6946BB8B56E467DC,$139ECB4366D1EEA5,$5CCEBF68AECEC3A1,$2616CFA09EFB4AD8,
|
|
|
|
+ $A97E5EF8CEA5D153,$D3A62E30FE90582A,$B0C7B7E3C7593BD8,$CA1FC72BF76CB2A1,$45775673A732292A,$3FAF26BB9707A053,
|
|
|
|
+ $70FF52905F188D57,$0A2722586F2D042E,$854FB3003F739FA5,$FF97C3C80F4616DC,$1BEF5B57AF4DC5AD,$61372B9F9F784CD4,
|
|
|
|
+ $EE5FBAC7CF26D75F,$9487CA0FFF135E26,$DBD7BE24370C7322,$A10FCEEC0739FA5B,$2E675FB4576761D0,$54BF2F7C6752E8A9,
|
|
|
|
+ $CDCF48D84FE75459,$B71738107FD2DD20,$387FA9482F8C46AB,$42A7D9801FB9CFD2,$0DF7ADABD7A6E2D6,$772FDD63E7936BAF,
|
|
|
|
+ $F8474C3BB7CDF024,$829F3CF387F8795D,$66E7A46C27F3AA2C,$1C3FD4A417C62355,$935745FC4798B8DE,$E98F353477AD31A7,
|
|
|
|
+ $A6DF411FBFB21CA3,$DC0731D78F8795DA,$536FA08FDFD90E51,$29B7D047EFEC8728
|
|
|
|
+ );
|
|
|
|
+
|
|
|
|
+{$ENDIF}
|
|
|
|
+
|
|
|
|
+function get_crc64_table : {const} PQWord;
|
|
|
|
+begin
|
|
|
|
+{$ifdef DYNAMIC_CRC_TABLE}
|
|
|
|
+ if (crc64_table_empty) then
|
|
|
|
+ make_crc64_table;
|
|
|
|
+{$endif}
|
|
|
|
+ get_crc64_table := {const} PQWord(@crc64_table);
|
|
|
|
+end;
|
|
|
|
+
|
|
|
|
+{void crc64(char *seq, char *res)
|
|
|
|
+
|
|
|
|
+ int i, j, low, high;
|
|
|
|
+ unsigned long long crc = INITIALCRC, part;
|
|
|
|
+ static int init = 0;
|
|
|
|
+ static unsigned long long CRCTable[256];
|
|
|
|
+
|
|
|
|
+
|
|
|
|
+ while (*seq)
|
|
|
|
+ crc = CRCTable[(crc ^ *seq++) & 0xff] ^ (crc >> 8);
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ The output is done in two parts to avoid problems with
|
|
|
|
+ architecture-dependent word order
|
|
|
|
+ */
|
|
|
|
+ low = crc & 0xffffffff;
|
|
|
|
+ high = (crc >> 32) & 0xffffffff;
|
|
|
|
+ sprintf (res, "%08X%08X", high, low);
|
|
|
|
+
|
|
|
|
+ return;
|
|
|
|
+}
|
|
|
|
+function crc64(crc: qword; buf: Pbyte; len: cardinal): qword;
|
|
|
|
+begin
|
|
|
|
+ if (buf = nil) then
|
|
|
|
+ exit(INITIALCRC);
|
|
|
|
+
|
|
|
|
+{$IFDEF DYNAMIC_CRC_TABLE}
|
|
|
|
+ if crc64_table_empty then
|
|
|
|
+ make_crc64_table;
|
|
|
|
+{$ENDIF}
|
|
|
|
+
|
|
|
|
+ while (len >= 8) do
|
|
|
|
+ begin
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ dec(len, 8);
|
|
|
|
+ end;
|
|
|
|
+
|
|
|
|
+ if (len <> 0) then
|
|
|
|
+ repeat
|
|
|
|
+ crc := crc64_table[(crc xor buf^) and $ff] xor (crc shr 8);
|
|
|
|
+ inc(buf);
|
|
|
|
+ dec(len);
|
|
|
|
+ until (len = 0);
|
|
|
|
+
|
|
|
|
+ result := crc;
|
|
end;
|
|
end;
|
|
|
|
|
|
|
|
|
|
-end.
|
|
|
|
|
|
+end.
|