1 files changed, 31 insertions, 0 deletions
diff --git a/src/game_state.cpp b/src/game_state.cpp
new file mode 100644
index 0000000..48a9e42
--- /dev/null
+++ b/src/game_state.cpp
@@ -0,0 +1,31 @@
+#include "game_state.h"
+#include <iostream>
+
+const int OPENING_LINES = 6;
+const int GAME_AREA_LINES = 25;
+
+GameState::GameState(std::istream& file)
+{
+    for (int i=0; i<OPENING_LINES; ++i)
+    {
+        file.ignore(numeric_limits<streamsize>::max(), '\n');
+    }
+    
+    int x = -1;
+    int y = 0;
+    char nextChar = ' ';
+    while (char nextChar = file.get())
+    {
+	++x;
+	switch (nextChar)
+	{
+	case Alien.MAP_CHAR:
+	    aliens.push_back(Alien(x,y));
+	    break;
+	case '\n':
+	    ++y;
+	    x = -1;
+	    break;
+	}
+    }
+}