Prevent an infinit loop if there is not

enough stone block on the map or if the map
is too little

src/field.c

@@ -1,4 +1,4 @@
-/* $Id: field.c,v 1.4 2003/05/04 19:23:00 ob1kenewb Exp $ */
+/* $Id: field.c,v 1.5 2003/05/04 20:26:16 ob1kenewb Exp $ */
 /* field.c - procedures which are needed to control the field */
 
 #include <stdlib.h>
@@ -146,7 +146,7 @@ field_new (char *filename)
       d;
     FILE *fmap;
     float fkt;
-
+    int nb_try; 
     fmap=fopen(filename,"r");
 
     /* if we can't open the given filename for any reason, reverting 
@@ -204,41 +204,57 @@ field_new (char *filename)
 					bman.field[x][y+1].type = FT_nothing;
 		}
 	
+	nb_try=100;
 	/* put the fire powerups in the field */
 	for (d = 0, x = 0, y = 0; d < GAME_SPECIAL_ITEMFIRE * fkt; d++) {
 		while (bman.field[x][y].type != FT_stone || bman.field[x][y].special != FT_nothing) {
 			x = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.x-1);
 			y = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.y-1);
+			nb_try--;
+			if(nb_try<0)
+				break;	
 		}
 		bman.field[x][y].special = FT_fire;
 		x = y = 0;
 	}
 
+	nb_try=100;
 	/* put the bomb powerups in the field */
 	for (d = 0, x = 0, y = 0; d < GAME_SPECIAL_ITEMBOMB * fkt; d++) {
 		while (bman.field[x][y].type != FT_stone || bman.field[x][y].special != FT_nothing) {
 			x = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.x-1);
 			y = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.y-1);
+			nb_try--;
+			if(nb_try<0)
+				break;	
 		}
 		bman.field[x][y].special = FT_bomb;
 		x = y = 0;
 	}
 
+	nb_try=100;
 	/* put the shoe powerup in the field */
 	for (d = 0, x = 0, y = 0; d < GAME_SPECIAL_ITEMSHOE * fkt; d++) {
 		while (bman.field[x][y].type != FT_stone || bman.field[x][y].special != FT_nothing) {
 			x = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.x-1);
 			y = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.y-1);
+			nb_try--;
+			if(nb_try<0)
+				break;	
 		}
 		bman.field[x][y].special = FT_shoe;
 		x = y = 0;
 	}
 	
+	nb_try=100;
 	/* put the death ?powerups? in the field */
 	for (d = 0, x = 0, y = 0; d < GAME_SPECIAL_ITEMDEATH * fkt; d++) {
 		while (bman.field[x][y].type != FT_stone || bman.field[x][y].special != FT_nothing) {
 			x = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.x-1);
 			y = ((float) rand() / (float) RAND_MAX) * (bman.fieldsize.y-1);
+			nb_try--;
+			if(nb_try<0)
+				break;	
 		}
 		bman.field[x][y].special = FT_death;
 		x = y = 0;