Message-Id:	<199712090235.PAA04007@fep1-orange.clear.net.nz>
From:	"Jamie Love" <jamie DOT love AT clear DOT net DOT nz>
To:	"DJGPP mailing list" <djgpp AT delorie DOT com>
Subject:	Cannot find bug in code!
Date:	Wed, 10 Dec 1997 03:38:54 +1300
MIME-Version:	1.0

This is a multi-part message in MIME format.

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Hi, I have attached two small files with this message that show my error.
I'm sure the error is self evident but I have to go to work soon and really
need this code to work! So, in an attempt to fix it, I'm asking for your
help.

When i compile this program with the line:
 gxx test.cc -o test.exe 

I get no errors.

When I run the program I get the following:
SEGSEGV under dos box in win95 (error occurs at the line: map[y][x].height
= seaLevel according to Rhide) in the function clear_map

Under Rhide I get the same thing

As this program is a cut down version of my actual game. I'll say that my
actual game gives the same result as above. Also, every now and again, the
program runs through and everything is ok.

Please help - without this I have no game!

Jamie Love
now on the web at http://www.geocities.com/SiliconValley/Horizon/4532
e-mail me at jamie DOT love AT clear DOT net DOT nz
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Content-Type: application/octet-stream; name="Game.h"
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Content-Description: Game.h (H File)
Content-Disposition: attachment; filename="Game.h"

/************************************************************************=
******************
 * |--\  |-\  |--   |   |\  /| |--- -----   |   |    |   /  |--- |-\  =
|---                *
 * |   | |  | |    | |  | \/ | |      |    | |  |    |  /   |    |  | |  =
                 *
 * |   | | /  |--  | |  |    | ---    |    | |  |    | /\   |--  | /  =
---                 *
 * |   | |\   |   | - | |    |    |   |   | - | |    |/  \  |    |\      =
|                *
 * |--/  |  \ |__ |   | |    | ___|   |   |   | |___ |    \ |___ |  \ =
___|                *
 *                                                                       =
                 *
 *                                                       Written by =
Jamie Love 1997 -1998 *
 *                                                                       =
                 *
 * game.h - data for the game                                            =
                 *
 =
*************************************************************************=
*****************/

#ifndef GAME_HEADER

  #define GAME_HEADER

  //the map data for every map square
  struct mapStruct
   {
     int height;                                 //height of the map =
piece
     int colorIndex;                             //index into a =
colorArray for color and
                                                 //texture
   };

  //the parameters for a map
  struct mapParams
   {
     int size;                                   //size of the map
     int lowestHeight;
     int heighestHeight;
     int seaLevel;
     int landLevel;                             //landLevel - seaLevel =
=3D beach
     int hillLevel;
     int mountainLevel;
   };

  //array of different colors and textures - holds all textures and =
colors for all the
  //different possible map squares
  struct colorArray
   {
     int        colors[100];
     BITMAP    *textures[100];                  //allegro.h must be =
included beforehand
   };

#endif


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Content-Type: application/octet-stream; name="Test.cc"
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Content-Description: Test.cc (CC File)
Content-Disposition: attachment; filename="Test.cc"

#include <allegro.h>
#include <iostream.h>
#include "game.h"                                //for the structures

//internal functions
int setup_params(mapParams *params);
int clear_map(mapStruct **map, int size, int seaLevel);
char *generate_map(mapStruct **map, mapParams *params);

//structure to tie all map data together
//global map also defined here
struct MAP_STRUCT
 {
   mapStruct  **map;
   mapParams  params;
   colorArray colors;
 } MAP;

int main(void)
 {
   //setup defaults
   setup_params(&MAP.params);

   //allocate memory for map
   MAP.map =3D (mapStruct **) new =
mapStruct[MAP.params.size][MAP.params.size];

   if(MAP.map =3D=3D NULL)
     return 0;

   //generate a map
   if( generate_map( MAP.map, &MAP.params) =3D=3D NULL)
     ;

   //free map memory
   delete[] MAP.map;

   return 1;
 }

char *generate_map(mapStruct **map, mapParams *params)
 {
   //clear the map to sea level first
   clear_map(map, params->size, params->seaLevel);

   return NULL;
 }


//clear the map to sea level first
int clear_map(mapStruct **map, int size, int seaLevel)
 {
   int x, y;

   for(y =3D 0; y < size; y++)
     for(x =3D 0; x < size; x++)
      {
        MAP.map[y][x].height =3D seaLevel;
        cout << "done x =3D " << x << " y =3D " << y << endl;
      }

   return 1;
 }

int setup_params(mapParams *params)
 {
   params->size           =3D 100;
   params->lowestHeight   =3D  -5;
   params->heighestHeight =3D  15;
   params->seaLevel       =3D   0;
   params->landLevel      =3D   1;
   params->hillLevel      =3D   7;
   params->mountainLevel  =3D  13;

   return 1;
 }


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