hedgewars/adler32.pas
author Wuzzy <Wuzzy2@mail.ru>
Mon, 12 Mar 2018 02:09:21 +0100
changeset 13169 6869d27a2f3f
parent 12758 49c31d8cc740
permissions -rw-r--r--
ACF7: Add one pick hammer in crate Players often reported to screw up with the pick hammer, which is quite annoying. With one pick hammer more, this mission should be slightly less annoying.
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
12758
49c31d8cc740 use pitch for surfaces, land_width x2 since 16 bit
nemo
parents: 10015
diff changeset
    68
function Adler32Update (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
12758
49c31d8cc740 use pitch for surfaces, land_width x2 since 16 bit
nemo
parents: 10015
diff changeset
   126
function Adler32Update(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.