hedgewars/adler32.pas
author unc0rr
Sat, 01 Mar 2014 23:37:01 +0400
changeset 10168 a2bf14203883
parent 10015 4feced261c68
child 12758 49c31d8cc740
permissions -rw-r--r--
Fix "don't know how to make hwengine.pas" error
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     1
unit Adler32;
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     2
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     3
{ZLib - Adler32 checksum function}
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     4
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     5
interface
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     6
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     7
(*************************************************************************
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     8
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
     9
 DESCRIPTION     :  ZLib - Adler32 checksum function
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    10
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    11
 REQUIREMENTS    :  TP5-7, D1-D7/D9-D10/D12, FPC, VP
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    12
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    13
 EXTERNAL DATA   :  ---
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    14
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    15
 MEMORY USAGE    :  ---
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    16
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    17
 DISPLAY MODE    :  ---
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    18
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    19
 REFERENCES      :  RFC 1950 (http://tools.ietf.org/html/rfc1950)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    20
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    21
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    22
 Version  Date      Author      Modification
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    23
 -------  --------  -------     ------------------------------------------
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    24
 0.10     30.08.03  W.Ehrhardt  Initial version based on MD5 layout
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    25
 2.10     30.08.03  we          Common vers., XL versions for Win32
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    26
 2.20     27.09.03  we          FPC/go32v2
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    27
 2.30     05.10.03  we          STD.INC, TP5.0
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    28
 2.40     10.10.03  we          common version, english comments
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    29
 3.00     01.12.03  we          Common version 3.0
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    30
 3.01     22.05.05  we          Adler32UpdateXL (i,n: integer)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    31
 3.02     17.12.05  we          Force $I- in Adler32File
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    32
 3.03     07.08.06  we          $ifdef BIT32: (const fname: shortstring...)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    33
 3.04     10.02.07  we          Adler32File: no eof, XL and filemode via $ifdef
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    34
 3.05     04.07.07  we          BASM16: speed-up factor 15
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    35
 3.06     12.11.08  we          uses BTypes, Ptr2Inc and/or Str255
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    36
 3.07     25.04.09  we          updated RFC URL(s)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    37
 3.08     19.07.09  we          D12 fix: assign with typecast string(fname)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    38
**************************************************************************)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    39
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    40
(*-------------------------------------------------------------------------
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    41
 (C) Copyright 2002-2009 Wolfgang Ehrhardt
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    42
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    43
 This software is provided 'as-is', without any express or implied warranty.
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    44
 In no event will the authors be held liable for any damages arising from
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    45
 the use of this software.
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    46
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    47
 Permission is granted to anyone to use this software for any purpose,
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    48
 including commercial applications, and to alter it and redistribute it
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    49
 freely, subject to the following restrictions:
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    50
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    51
 1. The origin of this software must not be misrepresented; you must not
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    52
    claim that you wrote the original software. If you use this software in
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    53
    a product, an acknowledgment in the product documentation would be
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    54
    appreciated but is not required.
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    55
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    56
 2. Altered source versions must be plainly marked as such, and must not be
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    57
    misrepresented as being the original software.
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    58
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    59
 3. This notice may not be removed or altered from any source distribution.
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    60
----------------------------------------------------------------------------*)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    61
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    62
(*
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    63
As per the license above, noting that this implementation of adler32 was stripped of everything we didn't need.
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    64
That means no btypes, file loading, and the assembly version disabled.
6926
6e832f8f4d8e Make adler32 friendlier for pas2c - this should work the same (needs testing ofc)
nemo
parents: 6580
diff changeset
    65
Also, the structure was removed to simplify C conversion
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    66
*)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    67
8026
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
    68
function Adler32Update (var adler : longint; Msg     :Pointer; Len     :longint ) : longint;
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    69
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    70
implementation
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    71
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    72
(*
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    73
$ifdef BASM16
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    74
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    75
procedure Adler32Update(var adler: longint; Msg: pointer; Len: longint);
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    76
    //-update Adler32 with Msg data
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    77
const
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    78
    BASE = 65521; // max. prime < 65536
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    79
    NMAX =  5552; // max. n with 255n(n+1)/2 + (n+1)(BASE-1) < 2^32
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    80
type
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    81
    LH    = packed record
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    82
            L,H: word;
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    83
            end;
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    84
var
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    85
    s1,s2: longint;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    86
    n: integer;
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    87
begin
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    88
    s1 := LH(adler).L;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    89
    s2 := LH(adler).H;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    90
    while Len > 0 do
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    91
        begin
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    92
    if Len<NMAX then
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    93
        n := Len
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    94
    else
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
    95
        n := NMAX;
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    96
    //BASM increases speed from about 52 cyc/byte to about 3.7 cyc/byte
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    97
    asm
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    98
                    mov  cx,[n]
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
    99
            db $66; mov  ax,word ptr [s1]
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   100
            db $66; mov  di,word ptr [s2]
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   101
                    les  si,[msg]
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   102
        @@1:  db $66, $26, $0f, $b6, $1c      // movzx ebx,es:[si]
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   103
                    inc  si
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   104
            db $66; add  ax,bx              // inc(s1, pByte(Msg)^)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   105
            db $66; add  di,ax              // inc(s2, s1
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   106
                    dec  cx
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   107
                    jnz  @@1
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   108
            db $66; sub  cx,cx
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   109
                    mov  cx,BASE
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   110
            db $66; sub  dx,dx
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   111
            db $66; div  cx
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   112
            db $66; mov  word ptr [s1],dx   // s1 := s1 mod BASE
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   113
            db $66; sub  dx,dx
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   114
            db $66; mov  ax,di
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   115
            db $66; div  cx
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   116
            db $66; mov  word ptr [s2],dx   // s2 := s2 mod BASE
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   117
                    mov  word ptr [msg],si  // save offset for next chunk
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   118
        end;
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   119
    dec(len, n);
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   120
    end;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   121
    LH(adler).L := word(s1);
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   122
    LH(adler).H := word(s2);
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   123
end;
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   124
*)
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   125
8026
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   126
function Adler32Update(var adler:longint; Msg: Pointer; Len :longint) : longint;
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   127
    {-update Adler32 with Msg data}
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   128
    const
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   129
        BASE = 65521; {max. prime < 65536 }
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   130
        NMAX = 3854; {max. n with 255n(n+1)/2 + (n+1)(BASE-1) < 2^31}
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   131
    var
8026
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   132
        s1, s2 : longint;
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   133
        i, n   : integer;
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   134
       m       : PByte;
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   135
    begin
8026
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   136
        m  := PByte(Msg);
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   137
        s1 := Longword(adler) and $FFFF;
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   138
        s2 := Longword(adler) shr 16;
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   139
        while Len>0 do
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   140
            begin
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   141
            if Len<NMAX then
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   142
                n := Len
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   143
            else
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   144
                n := NMAX;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   145
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   146
            for i := 1 to n do
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   147
                begin
8026
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   148
                inc(s1, m^);
4a4f21070479 merge xymeng's gsoc engine with a few updates (and further checks on symbol definitions)
koda
parents: 6927
diff changeset
   149
                inc(m);
6580
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   150
                inc(s2, s1);
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   151
                end;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   152
            s1 := s1 mod BASE;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   153
            s2 := s2 mod BASE;
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   154
            dec(len, n);
6155187bf599 A partial reformatting of the pascal code to have consistent syntax. Things that are still inconsistent.
lovelacer
parents: 3744
diff changeset
   155
            end;
6927
ee000959d645 Oh, and I guess this is needed as well, although if many other places in the code do this, pas2c will need
nemo
parents: 6926
diff changeset
   156
        Adler32Update:= (s2 shl 16) or s1;
3744
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   157
    end;
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   158
543412536b7b Convert from dos
nemo
parents: 3697
diff changeset
   159
end.