From f2f73e20553ed56a51b878f81098208fb8e5e273 Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Wed, 20 Sep 2006 21:18:05 +0000
Subject: [PATCH] Get rid of obnoxious iattak global.

This was a kluge to prevent recursion through an infinit regress of
moves leading to exit attacks forcing moves, etc.
---
 src/battle.c |  1 -
 src/events.c |  3 +--
 src/moving.c | 13 ++++++-------
 src/setup.c  |  1 -
 src/sst.h    |  3 +--
 5 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/src/battle.c b/src/battle.c
index 7815b72..dc3cede 100644
--- a/src/battle.c
+++ b/src/battle.c
@@ -544,7 +544,6 @@ void attack(bool torps_ok)
     coord jay;
     enum loctype where = neither;
 
-    game.iattak = 1;
     if (game.alldone) return;
     if (idebug) prout("=== ATTACK!");
 
diff --git a/src/events.c b/src/events.c
index 3fc27e6..b4d4658 100644
--- a/src/events.c
+++ b/src/events.c
@@ -784,8 +784,7 @@ void nova(coord nov)
     game.optime = 10.0*game.dist/16.0;
     skip(1);
     prout(_("Force of nova displaces starship."));
-    game.iattak=2;	/* Eliminates recursion problem */
-    imove();
+    imove(true);
     game.optime = 10.0*game.dist/16.0;
     return;
 }
diff --git a/src/moving.c b/src/moving.c
index 534c13f..948cdb4 100644
--- a/src/moving.c
+++ b/src/moving.c
@@ -4,8 +4,8 @@
 
 static void getcd(bool, int);
 
-void imove(void)
-/* movement execution for warp, impule, supernova, and tractor-beam events */
+void imove(bool novapush)
+/* movement execution for warp, impulse, supernova, and tractor-beam events */
 {
     double angle, deltax, deltay, bigger, x, y,
         finald, stopegy, probf;
@@ -51,7 +51,7 @@ void imove(void)
 	    if (!VALID_SECTOR(w.x, w.y)) {
 		/* Leaving quadrant -- allow final enemy attack */
 		/* Don't do it if being pushed by Nova */
-		if (game.nenhere != 0 && game.iattak != 2) {
+		if (game.nenhere != 0 && !novapush) {
 		    newcnd();
 		    for_local_enemies(m) {
 			finald = distance(w, game.ks[m]);
@@ -197,12 +197,11 @@ no_quad_change:
 	    game.kdist[m] = finald;
 	}
 	sortkl();
-	if (!game.state.galaxy[game.quadrant.x][game.quadrant.y].supernova && game.iattak == 0)
+	if (!game.state.galaxy[game.quadrant.x][game.quadrant.y].supernova)
 	    attack(false);
 	for_local_enemies(m) game.kavgd[m] = game.kdist[m];
     }
     newcnd();
-    game.iattak = 0;
     drawmaps(0);
     setwnd(message_window);
     return;
@@ -477,7 +476,7 @@ void impuls(void)
 	if (ja() == false) return;
     }
     /* Activate impulse engines and pay the cost */
-    imove();
+    imove(false);
     game.ididit = true;
     if (game.alldone) return;
     power = 20.0 + 100.0*game.dist;
@@ -605,7 +604,7 @@ void warp(bool timewarp)
 				
 
     /* Activate Warp Engines and pay the cost */
-    imove();
+    imove(false);
     if (game.alldone) return;
     game.energy -= game.dist*game.warpfac*game.warpfac*game.warpfac*(game.shldup+1);
     if (game.energy <= 0) finish(FNRG);
diff --git a/src/setup.c b/src/setup.c
index e0ca59d..8bbafbc 100644
--- a/src/setup.c
+++ b/src/setup.c
@@ -560,7 +560,6 @@ void newqad(bool shutup)
     coord w;
     struct quadrant *q;
 
-    game.iattak = 1;
     game.justin = true;
     game.base.x = game.base.y = 0;
     game.klhere = 0;
diff --git a/src/sst.h b/src/sst.h
index 2e6f909..f96ea03 100644
--- a/src/sst.h
+++ b/src/sst.h
@@ -286,7 +286,6 @@ struct game {
 	nenhere,	// number of enemies in quadrant
 	irhere,		// Romulans in quadrant
 	isatb,		// =1 if super commander is attacking base
-	iattak,		// attack recursion elimination (was cracks[4])
 	tourn,		// tournament number
 	proben,		// number of moves for probe
 	nprobes;	// number of probes available
@@ -400,7 +399,7 @@ coord randplace(int);
 coord dropin(feature);
 void newcnd(void);
 void sortkl(void);
-void imove(void);
+void imove(bool);
 void ram(bool, feature, coord);
 void crmena(bool, feature, enum loctype, coord w);
 void deadkl(coord, feature, coord);
-- 
2.31.1