[Add] Implemented the ability to steal fuel from ships.

src/board.c

@@ -9,12 +9,16 @@
 #include "hook.h"
 #include "board.h"
 
-#define BOARDING_WIDTH  300   /** Boarding window width. */
+#define BOARDING_WIDTH  300   /**< Boarding window width. */
-#define BOARDING_HEIGHT 200   /** boarding window height. */
+#define BOARDING_HEIGHT 200   /**< Boarding window height. */
+
+#define BUTTON_WIDTH    50    /**< Boarding button width. */
+#define BUTTON_HEIGHT   30    /**< Boarding button height. */
 
 static void board_exit(unsigned int wdw, char* str);
 static void board_stealCreds(unsigned int wdw, char* str);
 static void board_stealCargo(unsigned int wdw, char* str);
+static void board_stealFuel(unsigned int wdw, char* str);
 static int  board_fail(unsigned int wdw);
 static void board_update(unsigned int wdw);
 
@@ -66,19 +70,18 @@ void player_board(void) {
   window_addText(wdw, 20, -30, 120, 60,
                  0, "txtCargo", &gl_smallFont, &cDConsole,
                  "SCreds:\n"
-                 "Cargo:\n");
+                 "Cargo:\n"
+                 "Fuel:");
 
-  window_addText(wdw, 80, -30, 120, 60, 0, "txtData",
+  window_addButton(wdw, 20, 20, BUTTON_WIDTH, BUTTON_HEIGHT,
-                 &gl_smallFont, &cBlack, NULL);
+      "btnStealCredits", "Credits", board_stealCreds);
+  window_addButton(wdw, 20+BUTTON_WIDTH+20, 20, BUTTON_WIDTH, BUTTON_HEIGHT,
+      "btnStealCargo", "Cargo", board_stealCargo);
+  window_addButton(wdw, 20+2*(BUTTON_WIDTH+20), 20, BUTTON_WIDTH, BUTTON_HEIGHT,
+      "btnStealFuel", "Fuel", board_stealFuel);
 
-  window_addButton(wdw, 20, 20, 50, 30, "btnStealCredits",
+  window_addButton(wdw, -20, 20, BUTTON_WIDTH, BUTTON_HEIGHT,
-                   "Credits", board_stealCreds);
+      "btnBoardingClose", "Leave", board_exit);
-
-  window_addButton(wdw, 90, 20, 50, 30, "btnStealCargo",
-                   "Cargo", board_stealCargo);
-
-  window_addButton(wdw, -20, 20, 50, 30, "btnBoardingClose",
-                   "Leave", board_exit);
 
   board_update(wdw);
 
@@ -158,6 +161,41 @@ static void board_stealCargo(unsigned int wdw, char* str) {
   player_message("You manage to steal the ship's cargo.");
 }
 
+/**
+ * @brief 
+ */
+static void board_stealFuel(unsigned int wdw, char* str) {
+  (void)str;
+  double f;
+  Pilot* p;
+
+  p = pilot_get(player->target);
+
+  if(p->fuel <= 0.) { /* Urgh.. They don't have any fuel. */
+    player_message("The ship has no fuel.");
+    return;
+  }
+  else if(p->fuel == p->fuel_max) {
+    player_message("Your ship is at maximum fuel capacity.");
+    return;
+  }
+
+  if(board_fail(wdw)) return;
+
+  /* Steal fuel. */
+  f = player->fuel;
+  player->fuel += p->fuel;
+
+  /* Make sure doesn't overflow. */
+  if(player->fuel > player->fuel_max) {
+    p->fuel = player->fuel_max - player->fuel;
+    player->fuel = player->fuel_max;
+  }
+
+  board_update(wdw);
+  player_message("You manage to steal the ships fuel.");
+}
+
 /**
  * @brief Check to see if the hijack attempt failed.
  *    @return 1 on failure to board. Otherwise 0.
@@ -189,28 +227,41 @@ static int board_fail(unsigned int wdw) {
  * @brief Updates the boarding window.
  */
 static void board_update(unsigned int wdw) {
-  int i;
+  int i, len;
   char str[128], buf[32];
   char cred[10];
   Pilot* p;
 
   p = pilot_get(player->target);
 
+  /* Credits. */
   credits2str(cred, p->credits, 2);
 
-  snprintf(str, 11,
+  snprintf(str, 128, "%s\n", cred);
-           "%s\n", cred);
+  len = strlen(str);
-  if(p->ncommodities == 0)
+
-    strncat(str, "none", 10);
+  /* Commodities. */
-  else {
+  if(p->ncommodities == 0) {
+    strncat(str, "none", 128-len);
+    len = strlen(str);
+  } else {
     for(i = 0; i < p->ncommodities; i++) {
       snprintf(buf, 32,
                "%d %s\n",
                p->commodities[i].quantity, p->commodities[i].commodity->name);
-      strncat(str, buf, 32);
+      strncat(str, buf, 128-len);
+      len = strlen(str);
     }
   }
 
+  if(p->fuel <= 0.)
+    strncat(str, "none", 128-len);
+  else {
+    snprintf(buf, 32, "%.0f Units", p->fuel);
+    strncat(str, buf, 128-len);
+  }
+  len = strlen(str);
+
   window_modifyText(wdw, "txtData", str);
 }