[Fix] Major issue in how hooks worked, now hackishly sane!

dat/missions/empire00.lua

@@ -3,7 +3,7 @@ if lang == "es" then
   -- Not translated.
 else -- Default English.
   misn_title  = "Empire Recruitment"
-  misn_reward = "3000 credits"
+  misn_reward = "%d Scred"
   misn_desc   = "Deliver some parcels for the Empire to %s."
   title = {}
   title[1]  = "Spaceport Bar"
@@ -27,8 +27,9 @@ function create()
     dest = space.getPlanet("Empire");
 
     -- Mission details.
+    reward = 3000
     misn.setTitle(misn_title)
-    misn.setReward(misn_credits)
+    misn.setReward(string.format(misn_reward, reward))
     misn.setDesc(string.format(misn_desc, dest))
     
     tk.msg(title[2], string.format(text[3], dest))
@@ -42,7 +43,7 @@ end
 function land()
   if space.landName() == dest then
     if player.rmCargo(parcels) then
-      player.pay(3000)
+      player.pay(reward)
       -- More flavour text :)
       tk.msg(title[3], string.format(text[4], dest))
       misn.finish()

src/hook.c

@@ -7,23 +7,41 @@
 
 // The hook.
 typedef struct Hook_ {
-  int id;
-  Mission* misn;
-  char* func;
-  char* stack;
+  int id;               // Unique id.
+  unsigned int parent;  // Mission it's connected to.
+  char* func;           // Function returned.
+  char* stack;          // Stack it's a part of.
+
+  int delete;           // Indicates it should be deleted when possible.
 } Hook;
 
 // The stack.
-static unsigned int     hook_id     = 0; // Unique hook id.
-static Hook*            hook_stack  = NULL;
-static int              hook_mstack = 0;
-static int              hook_nstack = 0;
+static unsigned int     hook_id             = 0; // Unique hook id.
+static Hook*            hook_stack          = NULL;
+static int              hook_mstack         = 0;
+static int              hook_nstack         = 0;
+static int              hook_runningstack   = 0;  // Check if stack is running.
 
 // Extern.
 extern int misn_run(Mission* misn, char* func);
 
 int hook_run(Hook* hook) {
-  if(misn_run(hook->misn, hook->func))
+  int i;
+  Mission* misn;
+
+  if(hook->delete) return 0; // Hook should be deleted not run.
+
+  // Locate the mission.
+  for(i = 0; i < MISSION_MAX; i++)
+    if(player_missions[i].id == hook->parent)
+      break;
+  if(i >= MISSION_MAX) {
+    WARN("Trying to run hook with parent not in player mission stack!");
+    return -1;
+  }
+  misn = &player_missions[i];
+
+  if(misn_run(misn, hook->func))
     // Error has accured.
     WARN("Hook [%s] '%d' -> '%s' failed", hook->stack,
          hook->id, hook->func);
@@ -32,21 +50,22 @@ int hook_run(Hook* hook) {
 }
 
 // Add/Remove hooks.
-int hook_add(Mission* misn, char* func, char* stack) {
+int hook_add(unsigned int parent, char* func, char* stack) {
   Hook* new_hook;
 
   // If the memory must grow.
   if(hook_nstack+1 > hook_mstack) {
-    hook_stack = realloc(hook_stack, (hook_mstack+5)*sizeof(Hook));
     hook_mstack += 5;
+    hook_stack = realloc(hook_stack, hook_mstack*sizeof(Hook));
   }
 
   // Create the new hook.
   new_hook = &hook_stack[hook_nstack];
   new_hook->id      = ++hook_id;
-  new_hook->misn    = misn;
+  new_hook->parent  = parent;
   new_hook->func    = func;
   new_hook->stack   = stack;
+  new_hook->delete  = 0;
 
   hook_nstack++;
 
@@ -65,31 +84,47 @@ void hook_rm(int id) {
     else break;
   }
 
+  if(hook_runningstack) {
+    hook_stack[m].delete = 1;
+    return;
+  }
+
+  // Last hook, just clip the stack.
   if(m == (hook_nstack-1)) {
     hook_nstack--;
     return;
   }
 
   // Move it!
-  memmove(&hook_stack[m+1], &hook_stack[m+2], sizeof(Hook)*(hook_nstack-(m+2)));
+  memmove(&hook_stack[m], &hook_stack[m], sizeof(Hook)*(hook_nstack-(m+1)));
   hook_nstack--;
 }
 
 void hook_rmParent(unsigned int parent) {
   int i;
   for(i = 0; i < hook_nstack; i++)
-    if(parent == hook_stack[i].misn->id) {
+    if(parent == hook_stack[i].parent) {
       hook_rm(hook_stack[i].id);
-      i--;
+      if(!hook_runningstack) i--;
     }
 }
 
 // Run all hooks off the stack.
 int hooks_run(char* stack) {
   int i;
+
+  hook_runningstack = 1; // Running hooks.
   for(i = 0; i < hook_nstack; i++)
-    if(strcmp(stack, hook_stack[i].stack)==0)
+    if((strcmp(stack, hook_stack[i].stack)==0) && !hook_stack[i].delete) {
       hook_run(&hook_stack[i]);
+    }
+  hook_runningstack = 0; // Not running hooks anymore.
+
+  for(i = 0; i < hook_nstack; i++)
+    if((strcmp(stack, hook_stack[i].stack)==0) && hook_stack[i].delete) {
+      hook_rm(hook_stack[i].id);
+      i--;
+    }
 
   return 0;
 }

src/hook.h

@@ -2,7 +2,7 @@
 #include "mission.h"
 
 // Add/Run hooks.
-int hook_add(Mission* misn, char* func, char* stack);
+int hook_add(unsigned int parent, char* func, char* stack);
 void hook_rm(int id);
 void hook_rmParent(unsigned int parent);
 

src/misn_lua.c

@@ -319,7 +319,7 @@ static int player_rmCargo(lua_State* L) {
   mission_unlinkCargo(cur_mission, id);
 
   lua_pushboolean(L, !ret);
-  return 0;
+  return 1;
 }
 
 static int player_pay(lua_State* L) {
@@ -410,17 +410,26 @@ static int tk_input(lua_State* L) {
 
 // -- HOOK --
 static int hook_land(lua_State* L) {
+  int i;
   char* func;
   
   MIN_ARGS(1);
 
+  for(i = 0; i < MISSION_MAX; i++)
+    if(player_missions[i].id == cur_mission->id)
+      break;
+  if(i >= MISSION_MAX) {
+    WARN("Mission not in stack trying to hook");
+    return 0;
+  }
+
   if(lua_isstring(L, -1)) func = (char*)lua_tostring(L, -1);
   else {
     WARN("Mission '%s': trying to push non-valid function hook",
         cur_mission->data->name);
     return 0;
   }
-  hook_add(cur_mission, func, "land");
+  hook_add(cur_mission->id, func, "land");
   return 0;
 }
 

src/mission.c

@@ -129,7 +129,7 @@ void mission_unlinkCargo(Mission* misn, unsigned int cargo_id) {
     if(misn->cargo[i] == cargo_id)
       break;
 
-  if(i >= misn->cargo) {
+  if(i >= misn->ncargo) { // Not found.
     DEBUG("Mission '%s' attempting to unlink in existant cargo %d.",
         misn->title, cargo_id);
     return;