break out SDL_PollEvents() while loop to new function

include/input.h

@@ -1,6 +1,9 @@
 
 #pragma once
 
+#include <SDL2/SDL.h>
+
+
 struct input_state
 {
 	bool window_closed;
@@ -11,6 +14,10 @@ struct input_state
 	bool down;
 };
 
+void
+inputProcessEvent(input_state* is, SDL_Event& e);
+
+// NOTE: convenience function that provides a while(SDL_PollEvents()) loop
 void
 inputProcessEvents(input_state* is);
 

src/input.cpp

@@ -1,15 +1,14 @@
 
-#include <SDL2/SDL.h>
+#include <cassert>
 
 #include "input.h"
 
 
 void
-inputProcessEvents(input_state* is)
+inputProcessEvent(input_state* is, SDL_Event& e)
 {
-	SDL_Event e;
+	assert(is != nullptr);
 
-	while (SDL_PollEvent(&e)) {
 	switch (e.type) {
 		case SDL_QUIT:
 			is->window_closed = true;
@@ -34,6 +33,14 @@ inputProcessEvents(input_state* is)
 			break;
 		default: break;
 	}
-	}
+}
+
+void
+inputProcessEvents(input_state* is)
+{
+	SDL_Event e;
+
+	while (SDL_PollEvent(&e))
+		inputProcessEvent(is, e);
 }