(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2004-2015 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 *)

{$INCLUDE "options.inc"}

unit ArgParsers;

interface

procedure GetParams;

{$IFDEF HWLIBRARY}

var operatingsystem_parameter_argc: LongInt = 0; {$IFNDEF PAS2C}{$IFNDEF IPHONEOS}cdecl;{$ENDIF} export;{$ENDIF}

    operatingsystem_parameter_argv: pointer = nil; {$IFNDEF PAS2C}{$IFNDEF IPHONEOS}cdecl;{$ENDIF} export;{$ENDIF}

    operatingsystem_parameter_envp: pointer = nil; {$IFNDEF PAS2C}{$IFNDEF IPHONEOS}cdecl;{$ENDIF} export;{$ENDIF}

function ParamCount: LongInt;

function ParamStr(i: LongInt): shortstring;

{$ENDIF}

implementation

uses uVariables, uTypes, uUtils, uSound, uConsts;

var isInternal: Boolean;

    helpCommandUsed: Boolean;

{$IFDEF HWLIBRARY}

type PCharArray = array[0..255] of PChar;

     PPCharArray = ^PCharArray;

function ParamCount: LongInt;

begin

    ParamCount:= operatingsystem_parameter_argc - 1

end;

function ParamStr(i: LongInt): shortstring;

begin

    ParamStr:= StrPas(PPCharArray(operatingsystem_parameter_argv)^[i])

end;

{$ENDIF}

procedure GciEasterEgg;

begin

    WriteLn(stdout, '                                                                ');

    WriteLn(stdout, '      /\\\\\\\\\\\\        /\\\\\\\\\  /\\\\\\\\\\\             ');

    WriteLn(stdout, '     /\\\//////////      /\\\////////  \/////\\\///             ');

    WriteLn(stdout, '     /\\\               /\\\/               \/\\\               ');

    WriteLn(stdout, '     \/\\\    /\\\\\\\  /\\\                 \/\\\              ');

    WriteLn(stdout, '      \/\\\   \/////\\\ \/\\\                 \/\\\             ');

    WriteLn(stdout, '       \/\\\       \/\\\ \//\\\                \/\\\            ');

    WriteLn(stdout, '        \/\\\       \/\\\  \///\\\              \/\\\           ');

    WriteLn(stdout, '         \/\\\\\\\\\\\\\/     \////\\\\\\\\\  /\\\\\\\\\\\      ');

    WriteLn(stdout, '          \/////////////          \/////////  \///////////      ');

    WriteLn(stdout, '                                                                ');

    WriteLn(stdout, ' Command Line Parser Implementation by a Google Code-In Student ');

    WriteLn(stdout, '                                                                ');

end;

procedure DisplayUsage;

begin

    WriteLn(stdout, 'This is the Hedgewars Engine (hwengine), used to play Hedgewars games and demos.');

    WriteLn(stdout, 'Use the command-line arguments to play a demo.');

    WriteLn(stdout, '');

    WriteLn(stdout, 'Usage: hwengine <path to demo file> [options]');

    WriteLn(stdout, '');

    WriteLn(stdout, 'where [options] can be any of the following:');

    WriteLn(stdout, '');

    WriteLn(stdout, 'File locations:');

    WriteLn(stdout, '  --prefix <path to folder>: Set the path to the system game data folder');

    WriteLn(stdout, '  --user-prefix <path to folder>: Set the path to the custom data folder to find game content');

    WriteLn(stdout, '  --locale <name of file>: Set the game language (en.txt for example)');

    WriteLn(stdout, '');

    WriteLn(stdout, 'Graphics:');

    WriteLn(stdout, '  --width <width in pixels>: Set game window width');

    WriteLn(stdout, '  --height <height in pixels>: Set game window height');

    WriteLn(stdout, '  --maximized: Start in maximized window');

    WriteLn(stdout, '  --fullscreen: Start in fullscreen');

    WriteLn(stdout, '  --fullscreen-width <width in pixels>: Set fullscreen width');

    WriteLn(stdout, '  --fullscreen-height <height in pixels>: Set fullscreen height');

    WriteLn(stdout, '  --low-quality: Lowers the game quality');

    WriteLn(stdout, '  --zoom <percent>: Start with custom zoom level');

    WriteLn(stdout, '');

    WriteLn(stdout, 'Audio:');

    WriteLn(stdout, '  --volume <sound level>: Set volume between 0 and 100');

    WriteLn(stdout, '  --nomusic: Disable music');

    WriteLn(stdout, '  --nosound: Disable sound effects');

    WriteLn(stdout, '  --nodampen: Don''t dampen sound volume when game application loses focus');

    WriteLn(stdout, '');

    WriteLn(stdout, 'HUD:');

    WriteLn(stdout, '  --altdmg: Show alternative damage');

    WriteLn(stdout, '  --no-teamtag: Disable team name tags');

    WriteLn(stdout, '  --no-hogtag: Disable hedgehog name tags');

    WriteLn(stdout, '  --no-healthtag: Disable hedgehog health tags');

    WriteLn(stdout, '  --translucent-tags: Enable translucent name and health tags');

    WriteLn(stdout, '  --showfps: Show frames per second');

    WriteLn(stdout, '');

    WriteLn(stdout, 'Miscellaneous:');

    WriteLn(stdout, '  --nick <name>: Set user nickname');

    WriteLn(stdout, '  --help: Show a list of command-line options and exit');

    WriteLn(stdout, '  --protocol: Display protocol number and exit');

    WriteLn(stdout, '');

    Writeln(stdout, 'Advanced options:');

    Writeln(stdout, '  --stereo <value>: Set stereoscopic rendering (1 to 14)');

    WriteLn(stdout, '  --frame-interval <milliseconds>: Set minimum interval (in ms) between each frame. Eg, 40 would make the game run at most 25 fps');

    WriteLn(stdout, '  --raw-quality <flags>: Manually specify the reduced quality flags');

    WriteLn(stdout, '  --stats-only: Write the round information to console without launching the game, useful for statistics only');

    WriteLn(stdout, '  --lua-test <path to script>: Run a Lua test script');

    GameType:= gmtSyntaxHelp;

    helpCommandUsed:= true;

end;

procedure DisplayProtocol;

begin

    WriteLn(stdout, IntToStr(cNetProtoVersion));

    GameType:= gmtSyntaxHelp;

    helpCommandUsed:= true;

end;

procedure statsOnlyGame;

begin

    cOnlyStats:= true;

    cReducedQuality:= $FFFFFFFF xor rqLowRes;

    SetSound(false);

    SetMusic(false);

    SetVolume(0);

end;

procedure setIpcPort(port: LongInt; var wrongParameter:Boolean);

begin

    if isInternal then

        ipcPort := port

    else

        begin

        WriteLn(stderr, 'ERROR: use of --port is not allowed!');

        wrongParameter := true;

        end

end;

function parseNick(nick: shortstring): shortstring;

begin

    if isInternal then

        parseNick:= DecodeBase64(nick)

    else

        parseNick:= nick;

end;

procedure setStereoMode(tmp: LongInt);

begin

    GrayScale:= false;

{$IFDEF USE_S3D_RENDERING}

    if (tmp > 6) and (tmp < 13) then

        begin

        // set the gray anaglyph rendering

        GrayScale:= true;

        cStereoMode:= TStereoMode(max(0, min(ord(high(TStereoMode)), tmp-6)))

        end

    else if tmp <= 6 then

        // set the fullcolor anaglyph

        cStereoMode:= TStereoMode(max(0, min(ord(high(TStereoMode)), tmp)))

    else

        // any other mode

        cStereoMode:= TStereoMode(max(0, min(ord(high(TStereoMode)), tmp-6)));

{$ELSE}

    tmp:= tmp;

    cStereoMode:= smNone;

{$ENDIF}

end;

procedure startVideoRecording(var paramIndex: LongInt);

begin

    // Silence the hint that appears when USE_VIDEO_RECORDING is not defined

    paramIndex:= paramIndex;

{$IFDEF USE_VIDEO_RECORDING}

{$IFNDEF HWLIBRARY}

    GameType:= gmtRecord;

    inc(paramIndex);

    cVideoFramerateNum:= StrToInt(ParamStr(paramIndex)); inc(paramIndex);

    cVideoFramerateDen:= StrToInt(ParamStr(paramIndex)); inc(paramIndex);

    RecPrefix:= ParamStr(paramIndex);                    inc(paramIndex);

    cAVFormat:= ParamStr(paramIndex);                    inc(paramIndex);

    cVideoCodec:= ParamStr(paramIndex);                  inc(paramIndex);

    cVideoQuality:= StrToInt(ParamStr(paramIndex));      inc(paramIndex);

    cAudioCodec:= ParamStr(paramIndex);                  inc(paramIndex);

{$ENDIF}

{$ENDIF}

end;

function getLongIntParameter(str:shortstring; var paramIndex:LongInt; var wrongParameter:Boolean): LongInt;

var tmpInt, c: LongInt;

begin

    inc(paramIndex);

{$IFDEF PAS2C OR HWLIBRARY}

    val(str, tmpInt);

{$ELSE}

    val(str, tmpInt, c);

    wrongParameter:= c <> 0;

    if wrongParameter then

        WriteLn(stderr, 'ERROR: '+ParamStr(paramIndex-1)+' expects a number, you passed "'+str+'"!');

{$ENDIF}

    getLongIntParameter:= tmpInt;

end;

function getstringParameter(str:shortstring; var paramIndex:LongInt; var wrongParameter:Boolean): shortstring;

begin

    inc(paramIndex);

    wrongParameter:= (str='') or (Copy(str,1,2) = '--');

    {$IFNDEF HWLIBRARY}

    if wrongParameter then

        WriteLn(stderr, 'ERROR: '+ParamStr(paramIndex-1)+' expects a string, you passed "'+str+'"!');

    {$ENDIF}

    getstringParameter:= str;

end;

procedure setZoom(str:shortstring; var paramIndex:LongInt; var wrongParameter:Boolean);

var param: LongInt;

begin

    param:= getLongIntParameter(str, paramIndex, wrongParameter);

    if param = 100 then

        exit;

    UserZoom:= (param/100.0) * cDefaultZoomLevel;

    if UserZoom < cMaxZoomLevel then

        UserZoom:= cMaxZoomLevel;

    if UserZoom > cMinZoomLevel then

        UserZoom:= cMinZoomLevel;

    zoom:= UserZoom;

    ZoomValue:= UserZoom;

end;

function parseParameter(cmd:string; arg:string; var paramIndex:LongInt): Boolean;

                '--prefix', '--user-prefix', '--locale', '--fullscreen-width', '--fullscreen-height', '--width',

                '--height', '--maximized', '--frame-interval', '--volume','--nomusic', '--nosound', '--nodampen',

                '--fullscreen', '--showfps', '--altdmg', '--low-quality', '--raw-quality', '--stereo', '--nick',

                '--zoom',

  {internal}    '--internal', '--port', '--recorder', '--landpreview',

  {misc}        '--stats-only', '--gci', '--help','--protocol', '--no-teamtag','--no-hogtag','--no-healthtag','--translucent-tags','--lua-test','--no-holiday-silliness');

var cmdIndex: byte;

begin

    parseParameter:= false;

    cmdIndex:= 0;

    //NOTE: Any update to the list of parameters must be reflected in the case statement below, the reallyAll array above,

    //      the the DisplayUsage() procedure, the HWForm::getDemoArguments() function, and the online wiki

    while (cmdIndex <= High(reallyAll)) and (cmd <> reallyAll[cmdIndex]) do inc(cmdIndex);

    case cmdIndex of

        {--prefix}               0 : PathPrefix        := getstringParameter (arg, paramIndex, parseParameter);

        {--user-prefix}          1 : UserPathPrefix    := getstringParameter (arg, paramIndex, parseParameter);

        {--locale}               2 : cLanguageFName    := getstringParameter (arg, paramIndex, parseParameter);

        {--fullscreen-width}     3 : cFullscreenWidth  := max(getLongIntParameter(arg, paramIndex, parseParameter), cMinScreenWidth);

        {--fullscreen-height}    4 : cFullscreenHeight := max(getLongIntParameter(arg, paramIndex, parseParameter), cMinScreenHeight);

        {--width}                5 : cWindowedWidth    := max(2 * (getLongIntParameter(arg, paramIndex, parseParameter) div 2), cMinScreenWidth);

        {--height}               6 : cWindowedHeight   := max(2 * (getLongIntParameter(arg, paramIndex, parseParameter) div 2), cMinScreenHeight);

        {--maximized}            7 : cWindowedMaximized:= true;

        {--frame-interval}       8 : cTimerInterval    := getLongIntParameter(arg, paramIndex, parseParameter);

        {--volume}               9 : SetVolume          ( max(getLongIntParameter(arg, paramIndex, parseParameter), 0) );

        {--nomusic}             10 : SetMusic           ( false );

        {--nosound}             11 : SetSound           ( false );

        {--nodampen}            12 : SetAudioDampen     ( false );

        {--fullscreen}          13 : cFullScreen       := true;

        {--showfps}             14 : cShowFPS          := true;

        {--altdmg}              15 : cAltDamage        := true;

        {--low-quality}         16 : cReducedQuality   := $FFFFFFFF xor rqLowRes;

        {--raw-quality}         17 : cReducedQuality   := getLongIntParameter(arg, paramIndex, parseParameter);

        {--stereo}              18 : setStereoMode      ( getLongIntParameter(arg, paramIndex, parseParameter) );

        {--nick}                19 : UserNick          := parseNick( getstringParameter(arg, paramIndex, parseParameter) );

        {--zoom}                20 : setZoom(arg, paramIndex, parseParameter);

        {"internal" options}

        {anything else}

    else

        begin

        //Assume the first "non parameter" is the demo file, anything else is invalid

        if (recordFileName = '') and (Copy(cmd,1,2) <> '--') then

            recordFileName := cmd

        else

            begin

            WriteLn(stderr, '"'+cmd+'" is not a valid option.');

            parseParameter:= true;

            end;

        end;

    end;

end;

procedure parseCommandLine;

var paramIndex: LongInt;

    paramTotal: LongInt;

    index, nextIndex: LongInt;

    wrongParameter: boolean;

//var tmpInt: LongInt;

begin

    paramIndex:= {$IFDEF HWLIBRARY}0{$ELSE}1{$ENDIF};

    paramTotal:= ParamCount; //-1 because pascal enumeration is inclusive

    wrongParameter:= false;

    while (paramIndex <= paramTotal) do

        begin

        // avoid going past the number of paramTotal (esp. w/ library)

        index:= paramIndex;

        if index = paramTotal then nextIndex:= index

        else nextIndex:= index+1;

        wrongParameter:= parseParameter( ParamStr(index), ParamStr(nextIndex), paramIndex);

        inc(paramIndex);

        end;

    if wrongParameter = true then

        GameType:= gmtBadSyntax;

end;

procedure GetParams;

begin

    isInternal:= (ParamStr(1) = '--internal');

    helpCommandUsed:= false;

    UserPathPrefix := _S'.';

    PathPrefix     := cDefaultPathPrefix;

    recordFileName := '';

    parseCommandLine();

    if (isInternal) and (ParamCount<=1) then

        begin

        WriteLn(stderr, 'The "--internal" option should not be manually used!');

        GameType := gmtBadSyntax;

        end;

    if (not helpCommandUsed) then

        if (not cTestLua) and (not isInternal) and (recordFileName = '') then

            begin

            WriteLn(stderr, 'You must specify a demo file.');

            GameType := gmtBadSyntax;

            end

        else if (recordFileName <> '') then

            WriteLn(stdout, 'Attempting to play demo file "' + recordFilename + '".');

    if (GameType = gmtBadSyntax) then

        WriteLn(stderr, 'Please use --help to see possible arguments and their usage.');

end;

end.