(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2011 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

{$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 : TVisualGearType) : shortstring; overload;

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

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

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

function  EnumToStr(const en : TCapGroup) : 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;

function  DxDy2AttackAngle(const _dY, _dX: extended): 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;

function  CheckCJKFont(s: ansistring; font: THWFont): THWFont;

procedure AddFileLog(s: shortstring);

function  CheckNoTeamOrHH: boolean; inline;

function  GetLaunchX(at: TAmmoType; dir: LongInt; angle: LongInt): LongInt;

function  GetLaunchY(at: TAmmoType; angle: LongInt): LongInt;

procedure initModule;

procedure freeModule;

implementation

uses typinfo, Math, uConsts, uVariables, SysUtils;

{$IFDEF DEBUGFILE}

var 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 : TVisualGearType) : shortstring; overload;

begin

EnumToStr:= GetEnumName(TypeInfo(TVisualGearType), 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 EnumToStr(const en: TCapGroup) : shortstring; overload;

begin

EnumToStr := GetEnumName(TypeInfo(TCapGroup), 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;

function DxDy2AttackAngle(const _dY, _dX: extended): LongInt; inline;

begin

DxDy2AttackAngle:= trunc(arctan2(_dY, _dX) * (cMaxAngle/pi))

end;

procedure SetLittle(var r: hwFloat);

begin

r:= SignAs(cLittle, r)

end;

function isPowerOf2(i: Longword): boolean;

begin

isPowerOf2:= (i and (i - 1)) = 0

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;

procedure AddFileLog(s: shortstring);

begin

s:= s;

{$IFDEF DEBUGFILE}

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

flush(f)

{$ENDIF}

end;

function CheckCJKFont(s: ansistring; font: THWFont): THWFont;

var l, i : LongInt;

    u: WideChar;

    tmpstr: array[0..256] of WideChar;

begin

{$IFNDEF IPHONEOS}

// remove chinese fonts for now

if (font >= CJKfnt16) or (length(s) = 0) then

{$ENDIF}

    exit(font);

l:= Utf8ToUnicode(@tmpstr, Str2PChar(s), length(s))-1;

i:= 0;

while i < l do

    begin

    u:= tmpstr[i];

    if (#$1100  <= u) and  (

                           (u <= #$11FF )  or // Hangul Jamo

       ((#$2E80  <= u) and (u <= #$2FDF))  or // CJK Radicals Supplement / Kangxi Radicals

       ((#$2FF0  <= u) and (u <= #$303F))  or // Ideographic Description Characters / CJK Radicals Supplement

       ((#$3130  <= u) and (u <= #$318F))  or // Hangul Compatibility Jamo

       ((#$31C0  <= u) and (u <= #$31EF))  or // CJK Strokes

       ((#$3200  <= u) and (u <= #$4DBF))  or // Enclosed CJK Letters and Months / CJK Compatibility / CJK Unified Ideographs Extension A

       ((#$4E00  <= u) and (u <= #$9FFF))  or // CJK Unified Ideographs

       ((#$AC00  <= u) and (u <= #$D7AF))  or // Hangul Syllables

       ((#$F900  <= u) and (u <= #$FAFF))  or // CJK Compatibility Ideographs

       ((#$FE30  <= u) and (u <= #$FE4F)))    // CJK Compatibility Forms

       then exit(THWFont( ord(font) + ((ord(High(THWFont))+1) div 2) ));

    inc(i)

    end;

exit(font);

(* two more to check. pascal WideChar is only 16 bit though

       ((#$20000 <= u) and (u >= #$2A6DF)) or // CJK Unified Ideographs Extension B

       ((#$2F800 <= u) and (u >= #$2FA1F)))   // CJK Compatibility Ideographs Supplement *)

end;

function GetLaunchX(at: TAmmoType; dir: LongInt; angle: LongInt): LongInt;

begin

    GetLaunchX:= 0

(*

    if (Ammoz[at].ejectX <> 0) or (Ammoz[at].ejectY <> 0) then

        GetLaunchX:= sign(dir) * (8 + hwRound(AngleSin(angle) * Ammoz[at].ejectX) + hwRound(AngleCos(angle) * Ammoz[at].ejectY))

    else

        GetLaunchX:= 0 *)

end;

function GetLaunchY(at: TAmmoType; angle: LongInt): LongInt;

begin

    GetLaunchY:= 0

(*

    if (Ammoz[at].ejectX <> 0) or (Ammoz[at].ejectY <> 0) then

        GetLaunchY:= hwRound(AngleSin(angle) * Ammoz[at].ejectY) - hwRound(AngleCos(angle) * Ammoz[at].ejectX) - 2

    else

        GetLaunchY:= 0*)

end;

function CheckNoTeamOrHH: boolean;

begin

CheckNoTeamOrHH:= (CurrentTeam = nil) or (CurrentHedgehog^.Gear = nil);

end;

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 (UserPathPrefix <> '') then

        begin

            i:= 0;

            while(i < 7) do

            begin

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

                rewrite(f);

                if IOResult = 0 then break;

                inc(i)

            end;

            if i = 7 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.