1 files changed, 91 insertions, 0 deletions
diff --git a/src/state.c b/src/state.c
new file mode 100644
index 0000000..6b1f9c8
--- /dev/null
+++ b/src/state.c
@@ -0,0 +1,91 @@
+#include <engine/state.h>
+
+#include <include_states.h>
+
+typedef StateType state_update_t (void*);
+
+const char *StateTypeStr[] = {
+  "null",
+#define State(name) #name,
+#include <state_type_list.h>
+#undef State
+  "quit",
+};
+
+void State_init(StateType type,   memory *mem) {
+  switch (type) {
+#define State(name)                                   \
+    case (STATE_##name): {                            \
+      name##_init(memory_allocate(mem, sizeof(name##_state)));  \
+      break;                                          \
+    }
+#include <state_type_list.h>
+#undef State
+    case STATE_null:
+    case STATE_quit:
+      _DEBUG("Got %s state.\n", StateTypeStr[type]);
+      break;
+    default:
+      exit(EXIT_FAILURE);
+  }
+}
+
+
+void State_free(StateType type,   memory *mem) {
+  switch (type) {
+#define State(name)           \
+    case (STATE_##name): {    \
+      name##_free(mem->data); \
+      break;                  \
+    }
+#include <state_type_list.h>
+#undef State
+    case STATE_null:
+    case STATE_quit:
+      _DEBUG("Got %s state.\n", StateTypeStr[type]);
+      break;
+    default:
+      exit(EXIT_FAILURE);
+  }
+  memory_clear(mem);
+}
+
+
+StateType (*State_updateFunc(StateType type))(void*) {
+  switch (type) {
+#define State(name)                          \
+    case (STATE_##name): {                   \
+    return  (state_update_t*)&name##_update; \
+      break;                                 \
+    }
+#include <state_type_list.h>
+#undef State
+    case STATE_null:
+    case STATE_quit:
+      return NULL; //_DEBUG("Got %s state.\n", StateTypeStr[type]);
+      break;
+    default:
+      exit(EXIT_FAILURE);
+  }
+  return NULL;
+}
+
+StateType State_update(StateType type, memory *mem) {
+  StateType next_state = STATE_null;
+  switch (type) {
+#define State(name)                          \
+    case (STATE_##name): {                   \
+      next_state = name##_update(mem->data); \
+      break;                                 \
+    }
+#include <state_type_list.h>
+#undef State
+    case STATE_null:
+    case STATE_quit:
+      _DEBUG("Got %s state.\n", StateTypeStr[type]);
+      break;
+    default:
+      exit(EXIT_FAILURE);
+  }
+  return next_state;
+}