From a31f49b0d06d4874e266c62383a225d61bb1ae5d Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Thu, 20 Feb 2020 15:44:56 +0100
Subject: [PATCH] added flags for test mode, teamwork mode and infinite levels
 to EM engine

---
 src/game_em/cave.c    |  4 ++++
 src/game_em/cave.h    |  4 ++++
 src/game_em/convert.c | 33 ++++++++++++++++++++++-----------
 src/game_em/emerald.h |  1 +
 src/game_em/reademc.c |  4 ++++
 5 files changed, 35 insertions(+), 11 deletions(-)

diff --git a/src/game_em/cave.c b/src/game_em/cave.c
index fc872e9c..3519723d 100644
--- a/src/game_em/cave.c
+++ b/src/game_em/cave.c
@@ -68,6 +68,10 @@ void setLevelInfoToDefaults_EM(void)
 
   cav.num_ball_arrays = 8;
 
+  cav.testmode = FALSE;
+  cav.teamwork = FALSE;
+  cav.infinite = FALSE;
+
   for (i = 0; i < 8; i++)
     for (j = 0; j < 9; j++)
       cav.eater_array[i][j] = Cblank;
diff --git a/src/game_em/cave.h b/src/game_em/cave.h
index 0e3704d9..5dd05255 100644
--- a/src/game_em/cave.h
+++ b/src/game_em/cave.h
@@ -260,6 +260,10 @@ struct CAVE
 
   int num_ball_arrays;		/* number of ball data arrays used */
 
+  boolean testmode;		/* test mode */
+  boolean teamwork;		/* two player mode */
+  boolean infinite;		/* cave is infinitely wide */
+
   short eater_array[8][9];		/* eater data */
   short ball_array[8][8];		/* ball data */
   short android_array[GAME_TILE_MAX];	/* android clone data */
diff --git a/src/game_em/convert.c b/src/game_em/convert.c
index 4a4b9cf4..e5bc5c68 100644
--- a/src/game_em/convert.c
+++ b/src/game_em/convert.c
@@ -275,18 +275,21 @@ void prepare_em_level(void)
   lev.right = lev.left + lev.width;
   lev.bottom = lev.top + lev.height;
 
-  /* add linked cave buffer columns for wrap-around movement */
-  for (x = 0; x < lev.left; x++)
+  if (cav.infinite)
   {
-    lev.cavecol[x] = lev.cavecol[lev.width + x];
-    lev.nextcol[x] = lev.nextcol[lev.width + x];
-    lev.drawcol[x] = lev.drawcol[lev.width + x];
-    lev.boomcol[x] = lev.boomcol[lev.width + x];
-
-    lev.cavecol[lev.right + x] = lev.cavecol[lev.left + x];
-    lev.nextcol[lev.right + x] = lev.nextcol[lev.left + x];
-    lev.drawcol[lev.right + x] = lev.drawcol[lev.left + x];
-    lev.boomcol[lev.right + x] = lev.boomcol[lev.left + x];
+    /* add linked cave buffer columns for wrap-around movement */
+    for (x = 0; x < lev.left; x++)
+    {
+      lev.cavecol[x] = lev.cavecol[lev.width + x];
+      lev.nextcol[x] = lev.nextcol[lev.width + x];
+      lev.drawcol[x] = lev.drawcol[lev.width + x];
+      lev.boomcol[x] = lev.boomcol[lev.width + x];
+
+      lev.cavecol[lev.right + x] = lev.cavecol[lev.left + x];
+      lev.nextcol[lev.right + x] = lev.nextcol[lev.left + x];
+      lev.drawcol[lev.right + x] = lev.drawcol[lev.left + x];
+      lev.boomcol[lev.right + x] = lev.boomcol[lev.left + x];
+    }
   }
 
   for (x = 0; x < lev.width; x++)
@@ -301,6 +304,14 @@ void prepare_em_level(void)
   lev.gems_needed = cav.gems_needed;
   lev.score = 0;
 
+  lev.testmode = cav.testmode;
+
+  if (lev.testmode)
+  {
+    lev.time = 0;
+    lev.gems_needed = 0;
+  }
+
   lev.eater_score	= cav.eater_score;
   lev.alien_score	= cav.alien_score;
   lev.bug_score		= cav.bug_score;
diff --git a/src/game_em/emerald.h b/src/game_em/emerald.h
index 0bb0993b..bceb8473 100644
--- a/src/game_em/emerald.h
+++ b/src/game_em/emerald.h
@@ -678,6 +678,7 @@ struct LOGIC
   int home;			/* number of players not yet at home */
 				/* 0 == all players at home */
 
+  boolean testmode;		/* test mode */
   boolean killed_out_of_time;	/* kill player due to time out */
 
   int exit_x, exit_y;		/* kludge for playing player exit sound */
diff --git a/src/game_em/reademc.c b/src/game_em/reademc.c
index 05fa190f..b4ddbc24 100644
--- a/src/game_em/reademc.c
+++ b/src/game_em/reademc.c
@@ -273,6 +273,10 @@ void convert_em_level(unsigned char *src, int file_version)
   cav.time_seconds = MIN(GET_BE16(src[2110]), 9999);
   cav.gems_needed = src[2095];
 
+  cav.infinite = TRUE;
+  cav.testmode = FALSE;
+  cav.teamwork = (src[2150] & 128) ? TRUE : FALSE;
+
   /* scores */
 
   cav.emerald_score	= src[2084];
-- 
2.34.1