Back to General and Gameplay Programming

What is the most bizar syntax you have ever written?

Marsupial Rodentia · 2001-07-29T11:38:33

Recently I implemented a simple file parser for my script files. The code got tricky when I used pointers to __thiscall member functions, and then made the function call via those pointers. // My.h #define NUM_FNS 3 struct CMyClass : public CSomeBase { // Pointer to member function // Here is the bizar syntax typedef bool (CMyClass::* PTHISFN)( void ); // Struct to hold the pointer struct FnCallEtAl { int nSomeKindOfId; PTHISFN pFn; }; // Static member (array of function pointers) static FnCallEtAl MyMemberFns[NUM_FNS]; // Member function that will be pointed to bool MyFn1( void ); bool MyFn2( void ); bool MyFn3( void ); // Function that will call others via pointers void Run(); }; // Macro to help declare data // (in case the FnCallEtAl struct changes) #define TABITEM( ID, FN ) { ID, FN }, // My.cpp #inlcude "My.h" // Instantiate static data members CMyClass::FnCallEtAl CMyClass::MyMemberFns[NUM_FNS] = { TABITEM( 1, MyFn1 ) TABITEM( 2, MyFn2 ) TABITEM( 0, MyFn3 ) }; CMyClass::Run() { int nId; while( SomeBaseClassFn( &nId ) ) { // Here is the really tricky code // Tricky because you have to use the this pointer // to make the function call. if( !(this->*(MyMemberFns[nId].pFn))() ) return; } } bool CMyClass::MyFn1() { return true; } So what is the most bizar code or the tricky syntax you have ever written?

General and Gameplay Programming Programming

Started by Marsupial Rodentia December 05, 2000 03:34 PM

19 comments, last by Marsupial Rodentia 23 years, 6 months ago

crazy166

122

July 25, 2001 07:24 AM

here is some code i actually found at work (of course, function names changed, to protect the innocent):

  void function1( long* ptrToLong ){    ASSERT( ptrToLong != NULL );    TRACE( "%d", *ptrToLong );}void function2(){    long val = get_long_val();    long* plong = new long(val);    function1( plong );    delete plong;}

this was in many places in our code base after one of the spring semester co-op students left.
of course, the matching "delete" was left out in about half of them.

i just thought this was strange for c++.

crazy166
some people think i''m crazy, some people know i am

johnb

352

July 25, 2001 10:42 AM

I wrote this a few months ago: it parses source files replacing one set of calls with another, reordering the parameters as best it can acording to some simple rules. The only things missing are the arrays %replace and %shuffle which are tables of repaacement names and numbers of parameters.

    while (<>) {    @foo = split /\W+/;    foreach $word (@foo) {        if ($replace = $replace{$word}) {            if ($numargs = $shuffle{$word}) {                if ($numargs == 2) {                    s/^(.+?)$word\s*\(([^(),]+)\,\s+([^(),]+)\)/$1$replace\($3, $2\)/ or s/$word/\#\#$replace/;                } elsif ($numargs == 3) {                    s/^(.+?)$word\s*\(([^(),]+)\,([^(),]+)\,\s+([^(),]+)\)/$1$replace\($4, $2,$3\)/ or s/$word/\#\#$replace/;                } elsif ($numargs == 4) {                    s/^(.+?)$word\s*\(([^(),]+)\,([^(),]+)\,([^(),]+)\,\s+([^(),]+)\)/$1$replace\($5, $2,$3,$4\)/ or s/$word/\#\#$replace/;                } elsif ($numargs == 5) {                    s/^(.+?)$word\s*\(([^(),]+)\,([^(),]+)\,([^(),]+)\,([^(),]+)\,\s+([^(),]+)\)/$1$replace\($6, $2,$3,$4,$5\)/ or s/$word/\#\#$replace/;                } else {                    s/^(.+?)$word\s*\(([^(),]+)\,\s+([^(),]+)\,\s+([^(),]+)\)/$1$replace\($4, $3, $2\)/ or s/$word/\#\#$replace/;                }            } else {                s/$word/$replace/;            }        }    }    print;}

John BlackburneProgrammer, The Pitbull Syndicate

Ratman

181

July 25, 2001 10:53 AM

About generated code:

At my work we use a LOT of generated code. My boss wrote a nice java program that generates classes for accessing things in our database. You write the SQL statement in a text file, and it turns it into a full java class.

Its very nice because instead of hardcoding your SQL statements all over the place, every statement is saved in one directory and you can just re-generate and recompile to make a change.

---------------
Ratfest.org

3dModelMan

204

July 25, 2001 01:48 PM

     if (((                                 //  This complicated bit of logic	  ((ch[0] >= 48) && (ch[0] <= 57))  //  will only allow ONE decimal       && (                                 //  point and numbers with FIVE	   ((dp == 0) && (pos < 5 + minus))	    //  digits before it and	 ^ ((dp > 0) && (dp + minus + 3 > pos))    //  THREE digits after.		      ))	    ^ ((ch[0] == 46) && (dp == 0)))	    ^ ((ch[0] == 45) && (pos == 0)))

In my first major C program, I had to parse floating point input of +/-5.3 format, and this one if statement covered the lot.

It looks pretty tame compared to some of the stuff above!

Cheers

Matt

Uncaged

122

July 25, 2001 02:23 PM

Heres a snippet of code from an old 2D team MPOG I made. Players could control multiple vehicles (only one at a time).

  void DrawHumans(NDX_Screen *S, RECT window){	int i;	int z;		for(i = 0; i < NUM_HUMANS; i++)	{		if (tanks[i].occupied == 0 && jeeps[i].occupied == 0 && 			hovers[i].occupied == 0 && copters[i].occupied == 0 && humans[i].state & ALIVE && 			humans[i].x + 30 > (int)mapfile.xglob && humans[i].x < (int)mapfile.xglob+640			&& humans[i].y+30 > (int)mapfile.yglob && humans[i].y < (int)mapfile.yglob+480)		{			if (humans[i].name == "JohnDoe" || humans[i].name == "Invalid")				CGamePlayerQuery q(i,player.pid,0);						humanspriteframelist.Draw(S->Back,(int)humans[i].x-(int)mapfile.xglob,				(int)humans[i].y-(int)mapfile.yglob,				(int)humans[i].bodyframe*6+humans[i].walkingframe/2);						if (mx >= (int)humans[i].x-(int)mapfile.xglob-20 && mx <= (int)humans[i].x-(int)mapfile.xglob &&				my >= (int)humans[i].y-(int)mapfile.yglob-25 && my <= (int)humans[i].y-(int)mapfile.yglob+5)			{				char info[50];				sprintf(info,"[%s]",humans[i].name);				screen->Back->Text(info,(int)humans[i].x - (strlen(info)/2)-3 - mapfile.xglob, (int)humans[i].y + 16 - (int)mapfile.yglob, RGB(255,255,255),chatfont);								screen->Back->Lock();				for (z = 0;z<humans[i].health;z++)					screen->Back->PutPixel_16((int)humans[i].x-mapfile.xglob+z,(int)humans[i].y-mapfile.yglob+30,screen->PixelFormat->Rgb(0,255,0));				screen->Back->Unlock();			}		}	}	}

The logic itself is not complicated... I think its my spaghetti code that makes it so darn ugly

-- Brian

CheeseGrater

122

July 25, 2001 02:39 PM

Back when I was learning 80186 assembler, I wrote some code that actually copied new opcodes over itself into the code segment.
It kept the executable size down.

MothaBrain

122

July 26, 2001 09:42 AM

I like this one from my code.
It converts a 8888-RGBA color to a specific
pixel format of a texture.

  Col24Bit = *buf;// Convert to cbm formatColForCBM  = ((((Col24Bit>>16) & 0xFF) >> (8-RBits)) << GBits << BBits) & DDPF.dwRBitMask;ColForCBM += ((((Col24Bit>>8) & 0xFF) >> (8-GBits)) << BBits) & DDPF.dwGBitMask;ColForCBM += ((Col24Bit & 0xFF) >> (8-BBits)) & DDPF.dwBBitMask;ColForCBM += 0xFFFFFFFF & DDPF.dwRGBAlphaBitMask;

Roppi
Moon Byte Studios
http://www.moonbyte.de

Diodor

517

July 26, 2001 02:29 PM

This is part of the code I used for my first so called 3d engine some 7 years ago. It calculates a perspective projection (you know that x2d = x3d / z3d; y2d = y3d / z3d thingie) Hey, I''ve figured out all these formulas by myself

  repeat    k:=k+1;{-------------------X---------------}    delta:=ungle(a,b,points3[k,1],points3[k,2]);    alfa1:=un(alfa-180);    if  (delta>alfa) and (deltaalfa1) then v:=1                                                                          else v:=-1;    if alfa>=180 then v:=v*(-1);    gama:=un(alfa-delta);    if gama>180 then  gama:=gama-180;    if cos(gama*rad)=0 then points2[k,1]:=mx                       else points2[k,1]:=mx+v*abs(sin(gama*rad)/cos(gama*rad))*n;{-------------------Y---------------}    if (sqrt((a-points3[k,1])*(a-points3[k,1])+(b-points3[k,2])*(b-points3[k,2])))=0 then gama:=90      else gama:=arctan(abs(points3[k,3]-c)/(sqrt((a-points3[k,1])*(a-points3[k,1])                      +(b-points3[k,2])*(b-points3[k,2]))));    points2[k,2]:=my-35/48*sign(points3[k,3]-c)*sin(gama)/cos(gama)*n;{---------------dist----------------}    points2[k,3]:=sqrt(sqr(c-points3[k,3])+sqr(a-points3[k,1])+sqr(b-points3[k,2]));{-----------------------------------}  until k=m;

diogames.com

stevenmarky

369

July 26, 2001 02:43 PM

MonKey JumpArOunD(void (*) (Banana&, HaiRryAss*), Fleas&, Rabies&)

Thats my monkey jumparound function which takes a function pointer as an argument, and other MOnkey attributes

Dwiel

365

July 29, 2001 11:02 AM

I have a program (s) I wrote so I could use an old computer soley to play mp3s. At one point I had a VB program start when the comp was turned on. It activated a c++ program that sent messages to winamp via SendMessage() and a QBasic program that was activated by the c++ program as a screen saver the looked like the matrix because QBasic is so easy and I had the scrolling chinese letters in 30 mins. The VB program turned off the computer when I pushed ''q'' twice. I don''t know how odd this is, I just thought it was cool having 3 programs made from 3 different languages all working together performaing a single task.

Tazzel3d ~ Zach

I don''t know how all you guys write all those nice quotes, but I havn''t come up with one yet!

Dwiel

What is the most bizar syntax you have ever written?

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

What is the most bizar syntax you have ever written?

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines