hedgewars/uRandom.pas
author koda
Thu, 13 Jan 2011 04:17:51 +0100
branch0.9.15
changeset 4736 b4b44ae480c2
parent 4665 fa7ad5f3725f
child 4976 088d40d8aba2
permissions -rw-r--r--
merge
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
     1
(*
1066
1f1b3686a2b0 Update copyright headers a bit
unc0rr
parents: 920
diff changeset
     2
 * Hedgewars, a free turn based strategy game
3236
4ab3917d7d44 Update (c) lines to 2010 as unc0rr requested - they all had varying values so I just took the first year mentioned, then tacked on -2010
nemo
parents: 3038
diff changeset
     3
 * Copyright (c) 2004-2010 Andrey Korotaev <unC0Rr@gmail.com>
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
     4
 *
183
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     5
 * This program is free software; you can redistribute it and/or modify
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     6
 * it under the terms of the GNU General Public License as published by
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     7
 * the Free Software Foundation; version 2 of the License
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
     8
 *
183
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
     9
 * This program is distributed in the hope that it will be useful,
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    10
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    11
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    12
 * GNU General Public License for more details.
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    13
 *
183
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    14
 * You should have received a copy of the GNU General Public License
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    15
 * along with this program; if not, write to the Free Software
57c2ef19f719 Relicense to GPL
unc0rr
parents: 155
diff changeset
    16
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    17
 *)
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    18
2630
079ef82eac75 revamped file access and debug display
koda
parents: 2599
diff changeset
    19
{$INCLUDE "options.inc"}
079ef82eac75 revamped file access and debug display
koda
parents: 2599
diff changeset
    20
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    21
unit uRandom;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    22
interface
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    23
uses uFloat;
2924
908851e59958 Engine:
smxx
parents: 2716
diff changeset
    24
{$INCLUDE "config.inc"}
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    25
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
    26
procedure initModule;
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
    27
procedure freeModule;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
    28
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    29
procedure SetRandomSeed(Seed: shortstring);
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    30
function  GetRandom: hwFloat; overload;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    31
function  GetRandom(m: LongWord): LongWord; overload;
915
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    32
function  rndSign(num: hwFloat): hwFloat;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    33
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    34
implementation
3295
ced0ee8280ad fix building without DEBUGFILE
koda
parents: 3284
diff changeset
    35
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    36
var cirbuf: array[0..63] of Longword;
2699
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
    37
    n: byte;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    38
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    39
function GetNext: Longword;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    40
begin
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    41
n:= (n + 1) and $3F;
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    42
cirbuf[n]:=
105
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    43
           (cirbuf[(n + 40) and $3F] +           {n - 24 mod 64}
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    44
            cirbuf[(n +  9) and $3F])            {n - 55 mod 64}
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    45
            and $7FFFFFFF;                       {mod 2^31}
136
89970b70b076 Implement bot levels
unc0rr
parents: 130
diff changeset
    46
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    47
GetNext:= cirbuf[n]
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    48
end;
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    49
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    50
procedure SetRandomSeed(Seed: shortstring);
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    51
var i: Longword;
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    52
begin
155
401f4ea24715 Engine can generate land preview and send it via IPC
unc0rr
parents: 136
diff changeset
    53
n:= 54;
401f4ea24715 Engine can generate land preview and send it via IPC
unc0rr
parents: 136
diff changeset
    54
124
75b892eff74d Fixed PRNG to properly use seed string
unc0rr
parents: 107
diff changeset
    55
if Length(Seed) > 54 then Seed:= copy(Seed, 1, 54); // not 55 to ensure we have odd numbers in cirbuf
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    56
527
e23490ce1f06 - One more land template
unc0rr
parents: 431
diff changeset
    57
for i:= 0 to Pred(Length(Seed)) do
e23490ce1f06 - One more land template
unc0rr
parents: 431
diff changeset
    58
    cirbuf[i]:= byte(Seed[i + 1]);
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    59
124
75b892eff74d Fixed PRNG to properly use seed string
unc0rr
parents: 107
diff changeset
    60
for i:= Length(Seed) to 54 do
4665
fa7ad5f3725f Make basic training solvable again. Freeze RNG at current version for less of this kind of issue in future, and a bit more savable of seeds. Disable offsets in preparation for release.
nemo
parents: 4363
diff changeset
    61
    cirbuf[i]:= $A98765 + 68; // odd number
130
19e3c16fb9f0 Fix engine PRNG (accidentally deleted a line)
unc0rr
parents: 124
diff changeset
    62
19e3c16fb9f0 Fix engine PRNG (accidentally deleted a line)
unc0rr
parents: 124
diff changeset
    63
for i:= 0 to 1023 do GetNext
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    64
end;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    65
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    66
function GetRandom: hwFloat;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    67
begin
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    68
GetNext;
918
c8cff180da57 - Small optimization to hwFloat
unc0rr
parents: 916
diff changeset
    69
GetRandom.isNegative:= false;
c8cff180da57 - Small optimization to hwFloat
unc0rr
parents: 916
diff changeset
    70
GetRandom.QWordValue:= GetNext
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    71
end;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    72
102
c45643d3fd78 New faster random generator
unc0rr
parents: 22
diff changeset
    73
function GetRandom(m: LongWord): LongWord;
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    74
begin
105
e7cb9bb4a9de - Fixed integer->longint
unc0rr
parents: 102
diff changeset
    75
GetNext;
351
29bc9c36ad5f Fixed-point arithmetics in engine.
unc0rr
parents: 320
diff changeset
    76
GetRandom:= GetNext mod m
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    77
end;
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    78
915
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    79
function rndSign(num: hwFloat): hwFloat;
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    80
begin
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    81
num.isNegative:= odd(GetNext);
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    82
rndSign:= num
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    83
end;
33040b7695c0 - Some changes in clusters initialization
unc0rr
parents: 527
diff changeset
    84
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
    85
procedure initModule;
2699
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
    86
begin
2948
3f21a9dc93d0 Replace tabs with spaces using 'expand -t 4' command
unc0rr
parents: 2924
diff changeset
    87
    n:= 54;
3369
c7289e42f0ee add other controls for map preview, also fix a bug in digest
koda
parents: 3295
diff changeset
    88
    FillChar(cirbuf, 64*sizeof(Longword), 0);
2699
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
    89
end;
249adefa9c1c replace initialization/finalization statements with custom init functions
koda
parents: 2630
diff changeset
    90
3038
4e48c276a468 In pascal unit is a namespace
unc0rr
parents: 2948
diff changeset
    91
procedure freeModule;
2716
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
    92
begin
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
    93
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
    94
end;
b9ca1bfca24f complete the replacement of init/free wrappers for every unit
koda
parents: 2699
diff changeset
    95
4
bcbd7adb4e4b - set svn:eol-style to native
unc0rr
parents: 1
diff changeset
    96
end.