Arrange that we really _can_ compile all the puzzles into a single

binary if we choose: fix bugs in cube.c and sixteen.c that manifest
when compiled that way, and introduce list.c which provides a global
list of all the available puzzles.

[originally from svn r5169]

cube.c

@@ -25,7 +25,7 @@ struct solid {
     float border;                      /* border required around arena */
 };
 
-static const struct solid tetrahedron = {
+static const struct solid s_tetrahedron = {
     4,
     {
         0.0F, -0.57735026919F, -0.20412414523F,
@@ -46,7 +46,7 @@ static const struct solid tetrahedron = {
     0.0F, 0.3F
 };
 
-static const struct solid cube = {
+static const struct solid s_cube = {
     8,
     {
         -0.5F,-0.5F,-0.5F, -0.5F,-0.5F,+0.5F,
@@ -66,7 +66,7 @@ static const struct solid cube = {
     0.3F, 0.5F
 };
 
-static const struct solid octahedron = {
+static const struct solid s_octahedron = {
     6,
     {
         -0.5F, -0.28867513459472505F, 0.4082482904638664F,
@@ -93,7 +93,7 @@ static const struct solid octahedron = {
     0.0F, 0.5F
 };
 
-static const struct solid icosahedron = {
+static const struct solid s_icosahedron = {
     12,
     {
         0.0F, 0.57735026919F, 0.75576131408F,
@@ -145,7 +145,7 @@ enum {
     TETRAHEDRON, CUBE, OCTAHEDRON, ICOSAHEDRON
 };
 static const struct solid *solids[] = {
-    &tetrahedron, &cube, &octahedron, &icosahedron
+    &s_tetrahedron, &s_cube, &s_octahedron, &s_icosahedron
 };
 
 enum {

list.c

@@ -0,0 +1,38 @@
+/*
+ * list.c: List of puzzles.
+ */
+
+#include "puzzles.h"
+
+/*
+ * The available games can be most easily enumerated by searching
+ * for the line in each game source file saying "#define thegame
+ * <gamename>". Hence, the following piece of shell/Perl should
+ * regenerate this list automatically:
+
+perl -ne '/^#define thegame (\S+)/ and $1 ne "nullgame" and print "extern const game $1;\n"' *.c
+echo -e '\nconst game *gamelist[] = {'
+perl -ne '/^#define thegame (\S+)/ and $1 ne "nullgame" and print "    &$1,\n"' *.c
+echo -e '};\n\nconst int gamecount = lenof(gamelist);'
+
+ */
+
+extern const game cube;
+extern const game fifteen;
+extern const game net;
+extern const game netslide;
+extern const game pattern;
+extern const game rect;
+extern const game sixteen;
+
+const game *gamelist[] = {
+    &cube,
+    &fifteen,
+    &net,
+    &netslide,
+    &pattern,
+    &rect,
+    &sixteen,
+};
+
+const int gamecount = lenof(gamelist);

puzzles.h

@@ -201,9 +201,13 @@ struct game {
 
 /*
  * For one-game-at-a-time platforms, there's a single structure
- * like the above, under a fixed name.
+ * like the above, under a fixed name. For all-at-once platforms,
+ * there's a list of all available puzzles in array form.
  */
-#ifndef COMBINED
+#ifdef COMBINED
+extern const game *gamelist[];
+extern const int gamecount;
+#else
 extern const game thegame;
 #endif
 

sixteen.c

@@ -769,6 +769,10 @@ static int game_wants_statusbar(void)
     return TRUE;
 }
 
+#ifdef COMBINED
+#define thegame sixteen
+#endif
+
 const struct game thegame = {
     "Sixteen", "games.sixteen", TRUE,
     default_params,