hedgewars/uUtils.pas
author sheepluva
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(*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2011 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 *)
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{$INCLUDE "options.inc"}
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unit uUtils;
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interface
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uses uTypes, uFloat, GLunit;
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procedure SplitBySpace(var a, b: shortstring);
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procedure SplitByChar(var a, b: ansistring; c: char);
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function  EnumToStr(const en : TGearType) : shortstring; overload;
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function  EnumToStr(const en : TVisualGearType) : shortstring; overload;
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function  EnumToStr(const en : TSound) : shortstring; overload;
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function  EnumToStr(const en : TAmmoType) : shortstring; overload;
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function  EnumToStr(const en : THogEffect) : shortstring; overload;
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function  EnumToStr(const en : TCapGroup) : shortstring; overload;
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function  Min(a, b: LongInt): LongInt; inline;
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function  Max(a, b: LongInt): LongInt; inline;
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function  IntToStr(n: LongInt): shortstring;
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function  FloatToStr(n: hwFloat): shortstring;
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function  DxDy2Angle(const _dY, _dX: hwFloat): GLfloat;
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function  DxDy2Angle32(const _dY, _dX: hwFloat): LongInt;
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function  DxDy2AttackAngle(const _dY, _dX: hwFloat): LongInt;
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function  DxDy2AttackAngle(const _dY, _dX: extended): LongInt;
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procedure SetLittle(var r: hwFloat);
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function  Str2PChar(const s: shortstring): PChar;
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function  DecodeBase64(s: shortstring): shortstring;
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function  isPowerOf2(i: Longword): boolean;
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function  toPowerOf2(i: Longword): Longword; inline;
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function  endian(independent: LongWord): LongWord; inline;
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function  CheckCJKFont(s: ansistring; font: THWFont): THWFont;
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procedure AddFileLog(s: shortstring);
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function  CheckNoTeamOrHH: boolean; inline;
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function  GetLaunchX(at: TAmmoType; dir: LongInt; angle: LongInt): LongInt;
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function  GetLaunchY(at: TAmmoType; angle: LongInt): LongInt;
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procedure initModule;
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procedure freeModule;
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implementation
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uses typinfo, Math, uConsts, uVariables, SysUtils;
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{$IFDEF DEBUGFILE}
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var f: textfile;
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{$ENDIF}
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// should this include "strtolower()" for the split string?
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procedure SplitBySpace(var a, b: shortstring);
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var i, t: LongInt;
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begin
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i:= Pos(' ', a);
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if i > 0 then
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    begin
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    for t:= 1 to Pred(i) do
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        if (a[t] >= 'A')and(a[t] <= 'Z') then Inc(a[t], 32);
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    b:= copy(a, i + 1, Length(a) - i);
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    byte(a[0]):= Pred(i)
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    end else b:= '';
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end;
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procedure SplitByChar(var a, b: ansistring; c: char);
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var i: LongInt;
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begin
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i:= Pos(c, a);
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if i > 0 then
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    begin
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    b:= copy(a, i + 1, Length(a) - i);
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    setlength(a, Pred(i));
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    end else b:= '';
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end;
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function EnumToStr(const en : TGearType) : shortstring; overload;
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begin
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EnumToStr:= GetEnumName(TypeInfo(TGearType), ord(en))
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end;
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function EnumToStr(const en : TVisualGearType) : shortstring; overload;
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begin
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EnumToStr:= GetEnumName(TypeInfo(TVisualGearType), ord(en))
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end;
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function EnumToStr(const en : TSound) : shortstring; overload;
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begin
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EnumToStr:= GetEnumName(TypeInfo(TSound), ord(en))
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end;
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function EnumToStr(const en : TAmmoType) : shortstring; overload;
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begin
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EnumToStr:= GetEnumName(TypeInfo(TAmmoType), ord(en))
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end;
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function EnumToStr(const en: THogEffect) : shortstring; overload;
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begin
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EnumToStr := GetEnumName(TypeInfo(THogEffect), ord(en))
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end;
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function EnumToStr(const en: TCapGroup) : shortstring; overload;
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begin
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EnumToStr := GetEnumName(TypeInfo(TCapGroup), ord(en))
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end;
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function Min(a, b: LongInt): LongInt;
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begin
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if a < b then Min:= a else Min:= b
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end;
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function Max(a, b: LongInt): LongInt;
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begin
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if a > b then Max:= a else Max:= b
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end;
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function IntToStr(n: LongInt): shortstring;
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begin
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str(n, IntToStr)
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end;
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function FloatToStr(n: hwFloat): shortstring;
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begin
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FloatToStr:= cstr(n) + '_' + inttostr(Lo(n.QWordValue))
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end;
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function DxDy2Angle(const _dY, _dX: hwFloat): GLfloat;
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var dY, dX: Extended;
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begin
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dY:= _dY.QWordValue / $100000000;
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if _dY.isNegative then dY:= - dY;
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dX:= _dX.QWordValue / $100000000;
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if _dX.isNegative then dX:= - dX;
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DxDy2Angle:= arctan2(dY, dX) * 180 / pi
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end;
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function DxDy2Angle32(const _dY, _dX: hwFloat): LongInt;
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const _16divPI: Extended = 16/pi;
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var dY, dX: Extended;
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begin
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dY:= _dY.QWordValue / $100000000;
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if _dY.isNegative then dY:= - dY;
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dX:= _dX.QWordValue / $100000000;
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if _dX.isNegative then dX:= - dX;
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DxDy2Angle32:= trunc(arctan2(dY, dX) * _16divPI) and $1f
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end;
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function DxDy2AttackAngle(const _dY, _dX: hwFloat): LongInt;
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const MaxAngleDivPI: Extended = cMaxAngle/pi;
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var dY, dX: Extended;
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begin
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dY:= _dY.QWordValue / $100000000;
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if _dY.isNegative then dY:= - dY;
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dX:= _dX.QWordValue / $100000000;
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if _dX.isNegative then dX:= - dX;
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DxDy2AttackAngle:= trunc(arctan2(dY, dX) * MaxAngleDivPI)
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end;
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function DxDy2AttackAngle(const _dY, _dX: extended): LongInt; inline;
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begin
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DxDy2AttackAngle:= trunc(arctan2(_dY, _dX) * (cMaxAngle/pi))
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end;
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procedure SetLittle(var r: hwFloat);
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begin
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r:= SignAs(cLittle, r)
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end;
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function isPowerOf2(i: Longword): boolean;
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begin
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isPowerOf2:= (i and (i - 1)) = 0
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end;
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function toPowerOf2(i: Longword): Longword;
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begin
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toPowerOf2:= 1;
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while (toPowerOf2 < i) do toPowerOf2:= toPowerOf2 shl 1
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end;
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function DecodeBase64(s: shortstring): shortstring;
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const table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
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var i, t, c: Longword;
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begin
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c:= 0;
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for i:= 1 to Length(s) do
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    begin
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    t:= Pos(s[i], table);
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    if s[i] = '=' then inc(c);
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    if t > 0 then byte(s[i]):= t - 1 else byte(s[i]):= 0
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    end;
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i:= 1;
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t:= 1;
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while i <= length(s) do
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    begin
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    DecodeBase64[t    ]:= char((byte(s[i    ]) shl 2) or (byte(s[i + 1]) shr 4));
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    DecodeBase64[t + 1]:= char((byte(s[i + 1]) shl 4) or (byte(s[i + 2]) shr 2));
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    DecodeBase64[t + 2]:= char((byte(s[i + 2]) shl 6) or (byte(s[i + 3])      ));
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    inc(t, 3);
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    inc(i, 4)
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    end;
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if c < 3 then t:= t - c;
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byte(DecodeBase64[0]):= t - 1
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end;
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function Str2PChar(const s: shortstring): PChar;
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const CharArray: array[byte] of Char = '';
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begin
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CharArray:= s;
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CharArray[Length(s)]:= #0;
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Str2PChar:= @CharArray
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end;
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function endian(independent: LongWord): LongWord; inline;
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begin
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{$IFDEF ENDIAN_LITTLE}
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endian:= independent;
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{$ELSE}
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endian:= (((independent and $FF000000) shr 24) or
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          ((independent and $00FF0000) shr 8) or
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          ((independent and $0000FF00) shl 8) or
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          ((independent and $000000FF) shl 24))
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{$ENDIF}
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end;
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procedure AddFileLog(s: shortstring);
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begin
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s:= s;
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{$IFDEF DEBUGFILE}
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writeln(f, GameTicks: 6, ': ', s);
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flush(f)
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{$ENDIF}
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end;
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function CheckCJKFont(s: ansistring; font: THWFont): THWFont;
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var l, i : LongInt;
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    u: WideChar;
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    tmpstr: array[0..256] of WideChar;
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begin
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{$IFNDEF IPHONEOS}
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// remove chinese fonts for now
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if (font >= CJKfnt16) or (length(s) = 0) then
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{$ENDIF}
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    exit(font);
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l:= Utf8ToUnicode(@tmpstr, Str2PChar(s), length(s))-1;
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i:= 0;
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while i < l do
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    begin
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    u:= tmpstr[i];
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    if (#$1100  <= u) and  (
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                           (u <= #$11FF )  or // Hangul Jamo
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       ((#$2E80  <= u) and (u <= #$2FDF))  or // CJK Radicals Supplement / Kangxi Radicals
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       ((#$2FF0  <= u) and (u <= #$303F))  or // Ideographic Description Characters / CJK Radicals Supplement
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       ((#$3130  <= u) and (u <= #$318F))  or // Hangul Compatibility Jamo
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       ((#$31C0  <= u) and (u <= #$31EF))  or // CJK Strokes
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       ((#$3200  <= u) and (u <= #$4DBF))  or // Enclosed CJK Letters and Months / CJK Compatibility / CJK Unified Ideographs Extension A
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       ((#$4E00  <= u) and (u <= #$9FFF))  or // CJK Unified Ideographs
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       ((#$AC00  <= u) and (u <= #$D7AF))  or // Hangul Syllables
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       ((#$F900  <= u) and (u <= #$FAFF))  or // CJK Compatibility Ideographs
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       ((#$FE30  <= u) and (u <= #$FE4F)))    // CJK Compatibility Forms
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       then exit(THWFont( ord(font) + ((ord(High(THWFont))+1) div 2) ));
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    inc(i)
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    end;
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exit(font);
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(* two more to check. pascal WideChar is only 16 bit though
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       ((#$20000 <= u) and (u >= #$2A6DF)) or // CJK Unified Ideographs Extension B
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       ((#$2F800 <= u) and (u >= #$2FA1F)))   // CJK Compatibility Ideographs Supplement *)
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end;
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   308
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function GetLaunchX(at: TAmmoType; dir: LongInt; angle: LongInt): LongInt;
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begin
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    GetLaunchX:= 0
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(*
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   314
    if (Ammoz[at].ejectX <> 0) or (Ammoz[at].ejectY <> 0) then
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        GetLaunchX:= sign(dir) * (8 + hwRound(AngleSin(angle) * Ammoz[at].ejectX) + hwRound(AngleCos(angle) * Ammoz[at].ejectY))
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    else
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        GetLaunchX:= 0 *)
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end;
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   320
function GetLaunchY(at: TAmmoType; angle: LongInt): LongInt;
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   321
begin
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    GetLaunchY:= 0
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   323
(*
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   324
    if (Ammoz[at].ejectX <> 0) or (Ammoz[at].ejectY <> 0) then
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        GetLaunchY:= hwRound(AngleSin(angle) * Ammoz[at].ejectY) - hwRound(AngleCos(angle) * Ammoz[at].ejectX) - 2
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    else
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        GetLaunchY:= 0*)
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end;
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function CheckNoTeamOrHH: boolean;
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begin
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CheckNoTeamOrHH:= (CurrentTeam = nil) or (CurrentHedgehog^.Gear = nil);
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end;
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procedure initModule;
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{$IFDEF DEBUGFILE}{$IFNDEF IPHONEOS}var i: LongInt;{$ENDIF}{$ENDIF}
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begin
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{$IFDEF DEBUGFILE}
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{$I-}
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{$IFDEF IPHONEOS}
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    Assign(f,'../Documents/hw-' + cLogfileBase + '.log');
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    Rewrite(f);
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{$ELSE}
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    if (UserPathPrefix <> '') then
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        begin
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            i:= 0;
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            while(i < 7) do
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            begin
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                assign(f, UserPathPrefix + '/Logs/' + cLogfileBase + inttostr(i) + '.log');
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                rewrite(f);
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                if IOResult = 0 then break;
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                inc(i)
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            end;
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            if i = 7 then f:= stderr; // if everything fails, write to stderr
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        end
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    else
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        f:= stderr;
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{$ENDIF}
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{$I+}
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{$ENDIF}
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end;
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procedure freeModule;
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begin
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    recordFileName:= '';
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{$IFDEF DEBUGFILE}
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    writeln(f, 'halt at ', GameTicks, ' ticks. TurnTimeLeft = ', TurnTimeLeft);
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    flush(f);
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    close(f);
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{$ENDIF}
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end;
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end.