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

@@ -1,39 +1,46 @@
 
-#include <SDL2/SDL.h>
+#include <cassert>
 
 #include "input.h"
 
 
+void
+inputProcessEvent(input_state* is, SDL_Event& e)
+{
+	assert(is != nullptr);
+
+	switch (e.type) {
+		case SDL_QUIT:
+			is->window_closed = true;
+			break;
+		case SDL_KEYDOWN:
+			switch (e.key.keysym.sym) {
+				case SDLK_ESCAPE: is->escape = true; break;
+				case SDLK_LEFT: is->left = true; break;
+				case SDLK_RIGHT: is->right = true; break;
+				case SDLK_UP: is->up = true; break;
+				case SDLK_DOWN: is->down = true; break;
+			}
+			break;
+		case SDL_KEYUP:
+			switch (e.key.keysym.sym) {
+				case SDLK_ESCAPE: is->escape = false; break;
+				case SDLK_LEFT: is->left = false; break;
+				case SDLK_RIGHT: is->right = false; break;
+				case SDLK_UP: is->up = false; break;
+				case SDLK_DOWN: is->down = false; break;
+			}
+			break;
+		default: break;
+	}
+}
+
 void
 inputProcessEvents(input_state* is)
 {
 	SDL_Event e;
 
-	while (SDL_PollEvent(&e)) {
+	while (SDL_PollEvent(&e))
-		switch (e.type) {
+		inputProcessEvent(is, e);
-			case SDL_QUIT:
-				is->window_closed = true;
-				break;
-			case SDL_KEYDOWN:
-				switch (e.key.keysym.sym) {
-					case SDLK_ESCAPE: is->escape = true; break;
-					case SDLK_LEFT: is->left = true; break;
-					case SDLK_RIGHT: is->right = true; break;
-					case SDLK_UP: is->up = true; break;
-					case SDLK_DOWN: is->down = true; break;
-				}
-				break;
-			case SDL_KEYUP:
-				switch (e.key.keysym.sym) {
-					case SDLK_ESCAPE: is->escape = false; break;
-					case SDLK_LEFT: is->left = false; break;
-					case SDLK_RIGHT: is->right = false; break;
-					case SDLK_UP: is->up = false; break;
-					case SDLK_DOWN: is->down = false; break;
-				}
-				break;
-			default: break;
-		}
-	}
 }