Add "last used weapon" binding

src/d_player.h

@@ -223,6 +223,9 @@ typedef struct player_s
   int num_visitedlevels;
   level_t *visitedlevels;
 
+  // Last used weapon (last readyweapon).
+  weapontype_t lastweapon;
+
 } player_t;
 
 

src/g_game.c

@@ -318,6 +318,23 @@ static int G_NextWeapon(int direction)
         return weapon_order_table[i].weapon_num;
 }
 
+static weapontype_t LastWeapon(void)
+{
+    const weapontype_t weapon = players[consoleplayer].lastweapon;
+
+    if (weapon < wp_fist || weapon >= NUMWEAPONS || !WeaponSelectable(weapon))
+    {
+        return wp_nochange;
+    }
+
+    if (demo_compatibility && weapon == wp_supershotgun)
+    {
+        return wp_shotgun;
+    }
+
+    return weapon;
+}
+
 static weapontype_t WeaponSSG(void)
 {
     const player_t *player = &players[consoleplayer];
@@ -788,6 +805,10 @@ void G_BuildTiccmd(ticcmd_t* cmd)
     boom_weapon_state_injection = false;
     newweapon = P_SwitchWeapon(&players[consoleplayer]);           // phares
   }
+  else if (M_InputGameActive(input_lastweapon))
+  {
+    newweapon = LastWeapon();
+  }
   else
     {                                 // phares 02/26/98: Added gamemode checks
       // [FG] prev/next weapon keys and buttons
@@ -2937,6 +2958,7 @@ void G_PlayerReborn(int player)
   p->usedown = p->attackdown = true;  // don't do anything immediately
   p->playerstate = PST_LIVE;
   p->health = initial_health;  // Ty 03/12/98 - use dehacked values
+  p->lastweapon = wp_fist;
   p->readyweapon = p->pendingweapon = wp_pistol;
   p->weaponowned[wp_fist] = true;
   p->weaponowned[wp_pistol] = true;

src/m_input.c

@@ -699,6 +699,7 @@ void M_BindInputVariables(void)
     BIND_INPUT(input_weapon8, "Switch to weapon 8 (Chainsaw)");
     BIND_INPUT(input_weapon9, "Switch to weapon 9 (Super Shotgun)");
     BIND_INPUT(input_weapontoggle, "Switch between the two most-preferred weapons with ammo");
+    BIND_INPUT(input_lastweapon, "Switch to last used weapon");
 
     BIND_INPUT(input_menu_reloadlevel, "Restart current level/demo");
     BIND_INPUT(input_menu_nextlevel, "Go to next level");

src/m_input.h

@@ -56,6 +56,7 @@ enum
     input_weapon8,
     input_weapon9,
     input_weapontoggle,
+    input_lastweapon,
 
     input_menu_up,
     input_menu_down,

src/mn_setup.c

@@ -1361,6 +1361,7 @@ static setup_menu_t keys_settings2[] = {
     {"Chainsaw", S_INPUT, KB_X, M_SPC, {0}, m_scrn, input_weapon8},
     {"SSG",      S_INPUT, KB_X, M_SPC, {0}, m_scrn, input_weapon9},
     {"Best",     S_INPUT, KB_X, M_SPC, {0}, m_scrn, input_weapontoggle},
+    {"Last",     S_INPUT, KB_X, M_SPC, {0}, m_scrn, input_lastweapon},
     MI_GAP,
     // [FG] prev/next weapon keys and buttons
     {"Prev", S_INPUT, KB_X, M_SPC, {0}, m_scrn, input_prevweapon},

src/p_pspr.c

@@ -588,6 +588,7 @@ void A_Lower(player_t *player, pspdef_t *psp)
 
   if (player->pendingweapon < NUMWEAPONS || !mbf21)
   {
+    player->lastweapon = player->readyweapon;
     player->readyweapon = player->pendingweapon;
   }
 

src/p_saveg.c

@@ -989,11 +989,15 @@ static void saveg_read_player_t(player_t *str)
             level.map = saveg_read32();
             array_push(str->visitedlevels, level);
         }
+
+        // [Woof!]: weapontype_t lastweapon;
+        str->lastweapon = saveg_read_enum();
     }
     else
     {
         str->num_visitedlevels = 0;
         array_clear(str->visitedlevels);
+        str->lastweapon = wp_nochange;
     }
 }
 
@@ -1158,6 +1162,9 @@ static void saveg_write_player_t(player_t *str)
         saveg_write32(level->episode);
         saveg_write32(level->map);
     }
+
+    // [Woof!]: weapontype_t lastweapon;
+    saveg_write_enum(str->lastweapon);
 }