1 files changed, 640 insertions, 0 deletions
diff --git a/engines/glk/adrift/scnpcs.cpp b/engines/glk/adrift/scnpcs.cpp
new file mode 100644
index 0000000000..ab11acc5ae
--- /dev/null
+++ b/engines/glk/adrift/scnpcs.cpp
@@ -0,0 +1,640 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "glk/adrift/scare.h"
+#include "glk/adrift/scprotos.h"
+#include "glk/adrift/scgamest.h"
+
+namespace Glk {
+namespace Adrift {
+
+/* Trace flag, set before running. */
+static sc_bool npc_trace = FALSE;
+
+
+/*
+ * npc_in_room()
+ *
+ * Return TRUE if a given NPC is currently in a given room.
+ */
+sc_bool
+npc_in_room (sc_gameref_t game, sc_int npc, sc_int room)
+{
+  if (npc_trace)
+    {
+      sc_trace ("NPC: checking NPC %ld in room %ld (NPC is in %ld)\n",
+                npc, room, gs_npc_location (game, npc));
+    }
+
+  return gs_npc_location (game, npc) - 1 == room;
+}
+
+
+/*
+ * npc_count_in_room()
+ *
+ * Return the count of characters in the room, including the player.
+ */
+sc_int
+npc_count_in_room (sc_gameref_t game, sc_int room)
+{
+  sc_int count, npc;
+
+  /* Start with the player. */
+  count = gs_player_in_room (game, room) ? 1 : 0;
+
+  /* Total up other NPCs inhabiting the room. */
+  for (npc = 0; npc < gs_npc_count (game); npc++)
+    {
+      if (gs_npc_location (game, npc) - 1 == room)
+        count++;
+    }
+  return count;
+}
+
+
+/*
+ * npc_start_npc_walk()
+ *
+ * Start the given walk for the given NPC.
+ */
+void
+npc_start_npc_walk (sc_gameref_t game, sc_int npc, sc_int walk)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[6];
+  sc_int movetime;
+
+  /* Retrieve movetime 0 for the NPC walk. */
+  vt_key[0].string = "NPCs";
+  vt_key[1].integer = npc;
+  vt_key[2].string = "Walks";
+  vt_key[3].integer = walk;
+  vt_key[4].string = "MoveTimes";
+  vt_key[5].integer = 0;
+  movetime = prop_get_integer (bundle, "I<-sisisi", vt_key) + 1;
+
+  /* Set up walkstep. */
+  gs_set_npc_walkstep (game, npc, walk, movetime);
+}
+
+
+/*
+ * npc_turn_update()
+ * npc_setup_initial()
+ *
+ * Set initial values for NPC states, and update on turns.
+ */
+void
+npc_turn_update (sc_gameref_t game)
+{
+  sc_int index_;
+
+  /* Set current values for NPC seen states. */
+  for (index_ = 0; index_ < gs_npc_count (game); index_++)
+    {
+      if (!gs_npc_seen (game, index_)
+          && npc_in_room (game, index_, gs_playerroom (game)))
+        gs_set_npc_seen (game, index_, TRUE);
+    }
+}
+
+void
+npc_setup_initial (sc_gameref_t game)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[5];
+  sc_int index_;
+
+  /* Start any walks that do not depend on a StartTask */
+  vt_key[0].string = "NPCs";
+  for (index_ = 0; index_ < gs_npc_count (game); index_++)
+    {
+      sc_int walk;
+
+      /* Set up invariant parts of the properties key. */
+      vt_key[1].integer = index_;
+      vt_key[2].string = "Walks";
+
+      /* Process each walk, starting at the last and working backwards. */
+      for (walk = gs_npc_walkstep_count (game, index_) - 1; walk >= 0; walk--)
+        {
+          sc_int starttask;
+
+          /* If StartTask is zero, start walk at game start. */
+          vt_key[3].integer = walk;
+          vt_key[4].string = "StartTask";
+          starttask = prop_get_integer (bundle, "I<-sisis", vt_key);
+          if (starttask == 0)
+            npc_start_npc_walk (game, index_, walk);
+        }
+    }
+
+  /* Update seen flags for initial states. */
+  npc_turn_update (game);
+}
+
+
+/*
+ * npc_room_in_roomgroup()
+ *
+ * Return TRUE if a given room is in a given group.
+ */
+static sc_bool
+npc_room_in_roomgroup (sc_gameref_t game, sc_int room, sc_int group)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[4];
+  sc_int member;
+
+  /* Check roomgroup membership. */
+  vt_key[0].string = "RoomGroups";
+  vt_key[1].integer = group;
+  vt_key[2].string = "List";
+  vt_key[3].integer = room;
+  member = prop_get_integer (bundle, "I<-sisi", vt_key);
+  return member != 0;
+}
+
+
+/* List of direction names, for printing entry/exit messages. */
+static const sc_char *const DIRNAMES_4[] = {
+  "the north", "the east", "the south", "the west", "above", "below",
+  "inside", "outside",
+  NULL
+};
+static const sc_char *const DIRNAMES_8[] = {
+  "the north", "the east", "the south", "the west", "above", "below",
+  "inside", "outside",
+  "the north-east", "the south-east", "the south-west", "the north-west",
+  NULL
+};
+
+/*
+ * npc_random_adjacent_roomgroup_member()
+ *
+ * Return a random member of group adjacent to given room.
+ */
+static sc_int
+npc_random_adjacent_roomgroup_member (sc_gameref_t game,
+                                      sc_int room, sc_int group)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[5];
+  sc_bool eightpointcompass;
+  sc_int roomlist[12], count, length, index_;
+
+  /* If given room is "hidden", return nothing. */
+  if (room == -1)
+    return -1;
+
+  /* How many exits to consider? */
+  vt_key[0].string = "Globals";
+  vt_key[1].string = "EightPointCompass";
+  eightpointcompass = prop_get_boolean (bundle, "B<-ss", vt_key);
+  if (eightpointcompass)
+    length = sizeof (DIRNAMES_8) / sizeof (DIRNAMES_8[0]) - 1;
+  else
+    length = sizeof (DIRNAMES_4) / sizeof (DIRNAMES_4[0]) - 1;
+
+  /* Poll adjacent rooms. */
+  vt_key[0].string = "Rooms";
+  vt_key[1].integer = room;
+  vt_key[2].string = "Exits";
+  count = 0;
+  for (index_ = 0; index_ < length; index_++)
+    {
+      sc_int adjacent;
+
+      vt_key[3].integer = index_;
+      vt_key[4].string = "Dest";
+      adjacent = prop_get_child_count (bundle, "I<-sisis", vt_key);
+
+      if (adjacent > 0 && npc_room_in_roomgroup (game, adjacent - 1, group))
+        {
+          roomlist[count] = adjacent - 1;
+          count++;
+        }
+    }
+
+  /* Return a random adjacent room, or -1 if nothing is adjacent. */
+  return (count > 0) ? roomlist[sc_randomint (0, count - 1)] : -1;
+}
+
+
+/*
+ * npc_announce()
+ *
+ * Helper for npc_tick_npc().
+ */
+static void
+npc_announce (sc_gameref_t game, sc_int npc,
+              sc_int room, sc_bool is_exit, sc_int npc_room)
+{
+  const sc_filterref_t filter = gs_get_filter (game);
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[5], vt_rvalue;
+  const sc_char *text, *name, *const *dirnames;
+  sc_int dir, dir_match;
+  sc_bool eightpointcompass, showenterexit, found;
+
+  /* If no announcement required, return immediately. */
+  vt_key[0].string = "NPCs";
+  vt_key[1].integer = npc;
+  vt_key[2].string = "ShowEnterExit";
+  showenterexit = prop_get_boolean (bundle, "B<-sis", vt_key);
+  if (!showenterexit)
+    return;
+
+  /* Get exit or entry text, and NPC name. */
+  vt_key[2].string = is_exit ? "ExitText" : "EnterText";
+  text = prop_get_string (bundle, "S<-sis", vt_key);
+  vt_key[2].string = "Name";
+  name = prop_get_string (bundle, "S<-sis", vt_key);
+
+  /* Decide on four or eight point compass names list. */
+  vt_key[0].string = "Globals";
+  vt_key[1].string = "EightPointCompass";
+  eightpointcompass = prop_get_boolean (bundle, "B<-ss", vt_key);
+  dirnames = eightpointcompass ? DIRNAMES_8 : DIRNAMES_4;
+
+  /* Set invariant key for room exit search. */
+  vt_key[0].string = "Rooms";
+  vt_key[1].integer = room;
+  vt_key[2].string = "Exits";
+
+  /* Find the room exit that matches the NPC room. */
+  found = FALSE;
+  dir_match = 0;
+  for (dir = 0; dirnames[dir]; dir++)
+    {
+      vt_key[3].integer = dir;
+      if (prop_get (bundle, "I<-sisi", &vt_rvalue, vt_key))
+        {
+          sc_int dest;
+
+          /* Get room's direction destination, and compare. */
+          vt_key[4].string = "Dest";
+          dest = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+          if (dest == npc_room)
+            {
+              dir_match = dir;
+              found = TRUE;
+              break;
+            }
+        }
+    }
+
+  /* Print NPC exit/entry details. */
+  pf_buffer_character (filter, '\n');
+  pf_new_sentence (filter);
+  pf_buffer_string (filter, name);
+  pf_buffer_character (filter, ' ');
+  pf_buffer_string (filter, text);
+  if (found)
+    {
+      pf_buffer_string (filter, is_exit ? " to " : " from ");
+      pf_buffer_string (filter, dirnames[dir_match]);
+    }
+  pf_buffer_string (filter, ".\n");
+
+  /* Handle any associated resource. */
+  vt_key[0].string = "NPCs";
+  vt_key[1].integer = npc;
+  vt_key[2].string = "Res";
+  vt_key[3].integer = is_exit ? 3 : 2;
+  res_handle_resource (game, "sisi", vt_key);
+}
+
+
+/*
+ * npc_tick_npc_walk()
+ *
+ * Helper for npc_tick_npc().
+ */
+static void
+npc_tick_npc_walk (sc_gameref_t game, sc_int npc, sc_int walk)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[6];
+  sc_int roomgroups, movetimes, walkstep, start, dest, destnum;
+  sc_int chartask, objecttask;
+
+  if (npc_trace)
+    {
+      sc_trace ("NPC: ticking NPC %ld, walk %ld: step %ld\n",
+                npc, walk, gs_npc_walkstep (game, npc, walk));
+    }
+
+  /* Count roomgroups for later use. */
+  vt_key[0].string = "RoomGroups";
+  roomgroups = prop_get_child_count (bundle, "I<-s", vt_key);
+
+  /* Get move times array length. */
+  vt_key[0].string = "NPCs";
+  vt_key[1].integer = npc;
+  vt_key[2].string = "Walks";
+  vt_key[3].integer = walk;
+  vt_key[4].string = "MoveTimes";
+  movetimes = prop_get_child_count (bundle, "I<-sisis", vt_key);
+
+  /* Find a step to match the movetime. */
+  for (walkstep = 0; walkstep < movetimes - 1; walkstep++)
+    {
+      sc_int  movetime;
+
+      vt_key[5].integer = walkstep + 1;
+      movetime = prop_get_integer (bundle, "I<-sisisi", vt_key);
+      if (gs_npc_walkstep (game, npc, walk) > movetime)
+        break;
+    }
+
+  /* Sort out a destination. */
+  dest = start = gs_npc_location (game, npc) - 1;
+
+  vt_key[4].string = "Rooms";
+  vt_key[5].integer = walkstep;
+  destnum = prop_get_integer (bundle, "I<-sisisi", vt_key);
+
+  if (destnum == 0)          /* Hidden. */
+    dest = -1;
+  else if (destnum == 1)     /* Follow player. */
+    dest = gs_playerroom (game);
+  else if (destnum < gs_room_count (game) + 2)
+    dest = destnum - 2;      /* To room. */
+  else if (destnum < gs_room_count (game) + 2 + roomgroups)
+    {
+      sc_int initial;
+
+      /* For roomgroup walks, move only if walksteps has just refreshed. */
+      vt_key[4].string = "MoveTimes";
+      vt_key[5].integer = 0;
+      initial = prop_get_integer (bundle, "I<-sisisi", vt_key);
+      if (gs_npc_walkstep (game, npc, walk) == initial)
+        {
+          sc_int group;
+
+          group = destnum - 2 - gs_room_count (game);
+          dest = npc_random_adjacent_roomgroup_member (game, start, group);
+          if (dest == -1)
+            dest = lib_random_roomgroup_member (game, group);
+        }
+    }
+
+  /* See if the NPC actually moved. */
+  if (start != dest)
+    {
+      if (npc_trace)
+        sc_trace ("NPC: walking NPC %ld moved to %ld\n", npc, dest);
+
+      /* Move NPC to destination. */
+      gs_set_npc_location (game, npc, dest + 1);
+
+      /* Announce NPC movements, and handle meeting characters and objects. */
+      if (gs_player_in_room (game, start))
+        npc_announce (game, npc, start, TRUE, dest);
+      else if (gs_player_in_room (game, dest))
+        npc_announce (game, npc, dest, FALSE, start);
+    }
+
+  /* Handle meeting characters and objects. */
+  vt_key[4].string = "CharTask";
+  chartask = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+  if (chartask >= 0)
+    {
+      sc_int meetchar;
+
+      /* Run meetchar task if appropriate. */
+      vt_key[4].string = "MeetChar";
+      meetchar = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+      if ((meetchar == -1 && gs_player_in_room (game, dest))
+          || (meetchar >= 0 && dest == gs_npc_location (game, meetchar) - 1))
+        {
+          if (task_can_run_task (game, chartask))
+            task_run_task (game, chartask, TRUE);
+        }
+    }
+
+  vt_key[4].string = "ObjectTask";
+  objecttask = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+  if (objecttask >= 0)
+    {
+      sc_int meetobject;
+
+      /* Run meetobject task if appropriate. */
+      vt_key[4].string = "MeetObject";
+      meetobject = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+      if (meetobject >= 0 && obj_directly_in_room (game, meetobject, dest))
+        {
+          if (task_can_run_task (game, objecttask))
+            task_run_task (game, objecttask, TRUE);
+        }
+    }
+}
+
+
+/*
+ * npc_tick_npc()
+ *
+ * Move an NPC one step along current walk.
+ */
+static void
+npc_tick_npc (sc_gameref_t game, sc_int npc)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  sc_vartype_t vt_key[6];
+  sc_int walk;
+  sc_bool has_moved = FALSE;
+
+  if (npc_trace)
+    sc_trace ("NPC: ticking NPC %ld\n", npc);
+
+  /* Set up invariant key parts. */
+  vt_key[0].string = "NPCs";
+  vt_key[1].integer = npc;
+  vt_key[2].string = "Walks";
+
+  /* Find active walk, and if any found, make a step along it. */
+  for (walk = gs_npc_walkstep_count (game, npc) - 1; walk >= 0; walk--)
+    {
+      sc_int starttask, stoppingtask;
+
+      /* Ignore finished walks. */
+      if (gs_npc_walkstep (game, npc, walk) <= 0)
+        continue;
+
+      /* Get start task. */
+      vt_key[3].integer = walk;
+      vt_key[4].string = "StartTask";
+      starttask = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+
+      /*
+       * Check that the starter is still complete, and if not, stop walk.
+       * Then keep on looking for an active walk.
+       */
+      if (starttask >= 0 && !gs_task_done (game, starttask))
+        {
+          if (npc_trace)
+            sc_trace ("NPC: stopping NPC %ld walk, start task undone\n", npc);
+
+          gs_set_npc_walkstep (game, npc, walk, -1);
+          continue;
+        }
+
+      /* Get stopping task. */
+      vt_key[4].string = "StoppingTask";
+      stoppingtask = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+
+      /*
+       * If any stopping task has completed, ignore this walk but don't
+       * actually finish it; more like an event pauser, then.
+       *
+       * TODO Is this right?
+       */
+      if (stoppingtask >= 0 && gs_task_done (game, stoppingtask))
+        {
+          if (npc_trace)
+            sc_trace ("NPC: ignoring NPC %ld walk, stop task done\n", npc);
+
+          continue;
+        }
+
+      /* Decrement steps. */
+      gs_decrement_npc_walkstep (game, npc, walk);
+
+      /* If we just hit a walk end, loop if called for. */
+      if (gs_npc_walkstep (game, npc, walk) == 0)
+          {
+            sc_bool is_loop;
+
+            /* If walk is a loop, restart it. */
+            vt_key[4].string = "Loop";
+            is_loop = prop_get_boolean (bundle, "B<-sisis", vt_key);
+            if (is_loop)
+              {
+                vt_key[4].string = "MoveTimes";
+                vt_key[5].integer = 0;
+                gs_set_npc_walkstep (game, npc, walk,
+                                     prop_get_integer (bundle,
+                                                       "I<-sisisi", vt_key));
+              }
+            else
+              gs_set_npc_walkstep (game, npc, walk, -1);
+          }
+
+      /*
+       * If not yet made a move on this walk, make one, and once made, make
+       * no other
+       */
+      if (!has_moved)
+        {
+          npc_tick_npc_walk (game, npc, walk);
+          has_moved = TRUE;
+        }
+    }
+}
+
+
+/*
+ * npc_tick_npcs()
+ *
+ * Move each NPC one step along current walk.
+ */
+void
+npc_tick_npcs (sc_gameref_t game)
+{
+  const sc_prop_setref_t bundle = gs_get_bundle (game);
+  const sc_gameref_t undo = game->undo;
+  sc_int npc;
+
+  /*
+   * Compare the player location to last turn, to see if the player has moved
+   * this turn.  If moved, look for meetings with NPCs.
+   *
+   * TODO Is this the right place to do this.  After ticking each NPC, rather
+   * than before, seems more appropriate.  But the messages come out in the
+   * right order by putting it here.
+   *
+   * Also, note that we take the shortcut of using the undo gamestate here,
+   * rather than properly recording the prior location of the player, and
+   * perhaps also NPCs, in the live gamestate.
+   */
+  if (undo && !gs_player_in_room (undo, gs_playerroom (game)))
+    {
+      for (npc = 0; npc < gs_npc_count (game); npc++)
+        {
+          sc_int walk;
+
+          /* Iterate each NPC's walks. */
+          for (walk = gs_npc_walkstep_count (game, npc) - 1; walk >= 0; walk--)
+            {
+              sc_vartype_t vt_key[5];
+              sc_int chartask;
+
+              /* Ignore finished walks. */
+              if (gs_npc_walkstep (game, npc, walk) <= 0)
+                continue;
+
+              /* Retrieve any character meeting task for the NPC. */
+              vt_key[0].string = "NPCs";
+              vt_key[1].integer = npc;
+              vt_key[2].string = "Walks";
+              vt_key[3].integer = walk;
+              vt_key[4].string = "CharTask";
+              chartask = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+              if (chartask >= 0)
+                {
+                  sc_int meetchar;
+
+                  /* Run meetchar task if appropriate. */
+                  vt_key[4].string = "MeetChar";
+                  meetchar = prop_get_integer (bundle, "I<-sisis", vt_key) - 1;
+                  if (meetchar == -1 &&
+                      gs_player_in_room (game, gs_npc_location (game, npc) - 1))
+                    {
+                      if (task_can_run_task (game, chartask))
+                        task_run_task (game, chartask, TRUE);
+                    }
+                }
+            }
+        }
+    }
+
+  /* Iterate and tick each individual NPC. */
+  for (npc = 0; npc < gs_npc_count (game); npc++)
+    npc_tick_npc (game, npc);
+}
+
+
+/*
+ * npc_debug_trace()
+ *
+ * Set NPC tracing on/off.
+ */
+void
+npc_debug_trace (sc_bool flag)
+{
+  npc_trace = flag;
+}
+
+} // End of namespace Adrift
+} // End of namespace Glk