Hello world is working

source/main.c

@@ -0,0 +1,79 @@
+//This "hello world" was borrowed from the net
+//https://gist.github.com/fschr/92958222e35a823e738bb181fe045274
+
+// SDL2 Hello, World!
+// This should display a white screen for 2 seconds
+// compile with: clang++ main.cpp -o hello_sdl2 -lSDL2
+// run with: ./hello_sdl2
+#include <SDL2/SDL.h>
+#include <stdio.h>
+
+#include "lexer.h"
+#include "parser.h"
+#include "compiler.h"
+#include "interpreter.h"
+
+#define SCREEN_WIDTH 640
+#define SCREEN_HEIGHT 480
+
+int main(int argc, char* args[]) {
+  SDL_Window* window = NULL;
+  SDL_Surface* screenSurface = NULL;
+  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+    fprintf(stderr, "could not initialize sdl2: %s\n", SDL_GetError());
+    return 1;
+  }
+  window = SDL_CreateWindow(
+			    "hello_sdl2",
+			    SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
+			    SCREEN_WIDTH, SCREEN_HEIGHT,
+			    SDL_WINDOW_SHOWN
+			    );
+  if (window == NULL) {
+    fprintf(stderr, "could not create window: %s\n", SDL_GetError());
+    return 1;
+  }
+  screenSurface = SDL_GetWindowSurface(window);
+  SDL_FillRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0xFF, 0xFF, 0xFF));
+  SDL_UpdateWindowSurface(window);
+
+	//hacked in to test linking
+	{
+		//source
+		char* source = "print \"Hello world!\";";
+
+		//test basic compilation & collation
+		Lexer lexer;
+		Parser parser;
+		Compiler compiler;
+		Interpreter interpreter;
+
+		initLexer(&lexer, source);
+		initParser(&parser, &lexer);
+		initCompiler(&compiler);
+		initInterpreter(&interpreter);
+
+		Node* node = scanParser(&parser);
+
+		//write
+		writeCompiler(&compiler, node);
+
+		//collate
+		int size = 0;
+		unsigned char* bytecode = collateCompiler(&compiler, &size);
+
+		//run
+		runInterpreter(&interpreter, bytecode, size);
+
+		//cleanup
+		freeNode(node);
+		freeParser(&parser);
+		freeCompiler(&compiler);
+		freeInterpreter(&interpreter);
+	}
+
+	SDL_Delay(2000);
+  SDL_DestroyWindow(window);
+  SDL_Quit();
+  return 0;
+}