{$INCLUDE "options.inc"}

unit uUtils;

interface

uses uTypes, uFloat, GLunit;

procedure SplitBySpace(var a, b: shortstring);

procedure SplitByChar(var a, b: ansistring; c: char);

function  EnumToStr(const en : TGearType) : shortstring; overload;

function  EnumToStr(const en : TSound) : shortstring; overload;

function  EnumToStr(const en : TAmmoType) : shortstring; overload;

function  EnumToStr(const en : THogEffect) : shortstring; overload;

function  Min(a, b: LongInt): LongInt; inline;

function  Max(a, b: LongInt): LongInt; inline;

function  IntToStr(n: LongInt): shortstring;

function  FloatToStr(n: hwFloat): shortstring;

function  DxDy2Angle(const _dY, _dX: hwFloat): GLfloat;

function  DxDy2Angle32(const _dY, _dX: hwFloat): LongInt;

function  DxDy2AttackAngle(const _dY, _dX: hwFloat): LongInt;

procedure SetLittle(var r: hwFloat);

function  Str2PChar(const s: shortstring): PChar;

function  DecodeBase64(s: shortstring): shortstring;

function  isPowerOf2(i: Longword): boolean;

function  toPowerOf2(i: Longword): Longword; inline;

function  endian(independent: LongWord): LongWord; inline;

{$IFDEF DEBUGFILE}

procedure AddFileLog(s: shortstring);

{$ENDIF}

procedure initModule;

procedure freeModule;

implementation

uses typinfo, Math, uConsts, uVariables, SysUtils;

var

{$IFDEF DEBUGFILE}

    f: textfile;

{$ENDIF}

// should this include "strtolower()" for the split string?

procedure SplitBySpace(var a, b: shortstring);

var i, t: LongInt;

begin

i:= Pos(' ', a);

if i > 0 then

    begin

    for t:= 1 to Pred(i) do

        if (a[t] >= 'A')and(a[t] <= 'Z') then Inc(a[t], 32);

    b:= copy(a, i + 1, Length(a) - i);

    byte(a[0]):= Pred(i)

    end else b:= '';

end;

procedure SplitByChar(var a, b: ansistring; c: char);

var i: LongInt;

begin

i:= Pos(c, a);

if i > 0 then

    begin

    b:= copy(a, i + 1, Length(a) - i);

    setlength(a, Pred(i));

    end else b:= '';

end;

function EnumToStr(const en : TGearType) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TGearType), ord(en))

end;

function EnumToStr(const en : TSound) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TSound), ord(en))

end;

function EnumToStr(const en : TAmmoType) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TAmmoType), ord(en))

end;

function EnumToStr(const en: THogEffect) : shortstring; overload;

begin

    EnumToStr := GetEnumName(TypeInfo(THogEffect), ord(en))

end;

function Min(a, b: LongInt): LongInt;

begin

if a < b then Min:= a else Min:= b

end;

function Max(a, b: LongInt): LongInt;

begin

if a > b then Max:= a else Max:= b

end;

function IntToStr(n: LongInt): shortstring;

begin

str(n, IntToStr)

end;

function FloatToStr(n: hwFloat): shortstring;

begin

FloatToStr:= cstr(n) + '_' + inttostr(Lo(n.QWordValue))

end;

function DxDy2Angle(const _dY, _dX: hwFloat): GLfloat;

var dY, dX: Extended;

begin

dY:= _dY.QWordValue / $100000000;

if _dY.isNegative then dY:= - dY;

dX:= _dX.QWordValue / $100000000;

if _dX.isNegative then dX:= - dX;

DxDy2Angle:= arctan2(dY, dX) * 180 / pi

end;

function DxDy2Angle32(const _dY, _dX: hwFloat): LongInt;

const _16divPI: Extended = 16/pi;

var dY, dX: Extended;

begin

dY:= _dY.QWordValue / $100000000;

if _dY.isNegative then dY:= - dY;

dX:= _dX.QWordValue / $100000000;

if _dX.isNegative then dX:= - dX;

DxDy2Angle32:= trunc(arctan2(dY, dX) * _16divPI) and $1f

end;

function DxDy2AttackAngle(const _dY, _dX: hwFloat): LongInt;

const MaxAngleDivPI: Extended = cMaxAngle/pi;

var dY, dX: Extended;

begin

dY:= _dY.QWordValue / $100000000;

if _dY.isNegative then dY:= - dY;

dX:= _dX.QWordValue / $100000000;

if _dX.isNegative then dX:= - dX;

DxDy2AttackAngle:= trunc(arctan2(dY, dX) * MaxAngleDivPI)

end;

procedure SetLittle(var r: hwFloat);

begin

r:= SignAs(cLittle, r)

end;

function isPowerOf2(i: Longword): boolean;

begin

if i = 0 then exit(true);

while not odd(i) do i:= i shr 1;

isPowerOf2:= (i = 1)

end;

function toPowerOf2(i: Longword): Longword;

begin

toPowerOf2:= 1;

while (toPowerOf2 < i) do toPowerOf2:= toPowerOf2 shl 1

end;

function DecodeBase64(s: shortstring): shortstring;

const table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';

var i, t, c: Longword;

begin

c:= 0;

for i:= 1 to Length(s) do

    begin

    t:= Pos(s[i], table);

    if s[i] = '=' then inc(c);

    if t > 0 then byte(s[i]):= t - 1 else byte(s[i]):= 0

    end;

i:= 1;

t:= 1;

while i <= length(s) do

    begin

    DecodeBase64[t    ]:= char((byte(s[i    ]) shl 2) or (byte(s[i + 1]) shr 4));

    DecodeBase64[t + 1]:= char((byte(s[i + 1]) shl 4) or (byte(s[i + 2]) shr 2));

    DecodeBase64[t + 2]:= char((byte(s[i + 2]) shl 6) or (byte(s[i + 3])      ));

    inc(t, 3);

    inc(i, 4)

    end;

if c < 3 then t:= t - c;

byte(DecodeBase64[0]):= t - 1

end;

function Str2PChar(const s: shortstring): PChar;

const CharArray: array[byte] of Char = '';

begin

CharArray:= s;

CharArray[Length(s)]:= #0;

Str2PChar:= @CharArray

end;

function endian(independent: LongWord): LongWord; inline;

begin

{$IFDEF ENDIAN_LITTLE}

endian:= independent;

{$ELSE}

endian:= (((independent and $FF000000) shr 24) or

          ((independent and $00FF0000) shr 8) or

          ((independent and $0000FF00) shl 8) or

          ((independent and $000000FF) shl 24))

{$ENDIF}

end;

{$IFDEF DEBUGFILE}

procedure AddFileLog(s: shortstring);

begin

writeln(f, GameTicks: 6, ': ', s);

flush(f)

end;

{$ENDIF}

procedure initModule;

{$IFDEF DEBUGFILE}{$IFNDEF IPHONEOS}var i: LongInt;{$ENDIF}{$ENDIF}

begin

{$IFDEF DEBUGFILE}

{$I-}

{$IFDEF IPHONEOS}

    Assign(f,'../Documents/hw-' + cLogfileBase + '.log');

    Rewrite(f);

{$ELSE}

    if (ParamStr(1) <> '') and (ParamStr(2) <> '') then

        if (ParamCount <> 3) and (ParamCount <> cDefaultParamNum) then

        begin

            for i:= 0 to 7 do

            begin

                assign(f, ExtractFileDir(ParamStr(2)) + '/' + cLogfileBase + inttostr(i) + '.log');

                rewrite(f);

                if IOResult = 0 then break;

            end;

            if IOResult <> 0 then f:= stderr; // if everything fails, write to stderr

        end

        else

        begin

            for i:= 0 to 7 do

            begin

                assign(f, ParamStr(1) + '/Logs/' + cLogfileBase + inttostr(i) + '.log');

                rewrite(f);

                if IOResult = 0 then break;

            end;

            if IOResult <> 0 then f:= stderr; // if everything fails, write to stderr

        end

    else

        f:= stderr;

{$ENDIF}

{$I+}

{$ENDIF}

end;

procedure freeModule;

begin

    recordFileName:= '';

{$IFDEF DEBUGFILE}

    writeln(f, 'halt at ', GameTicks, ' ticks. TurnTimeLeft = ', TurnTimeLeft);

    flush(f);

    close(f);

{$ENDIF}

end;

end.