added arena for storing data

main.odin

@@ -1,6 +1,7 @@
 package main
 
 import "core:fmt"
+import vmem "core:mem/virtual"
 import "core:os"
 import SDL "vendor:sdl2"
 
@@ -16,19 +17,24 @@ print_usage :: proc() {
 	os.exit(1)
 }
 
-
 main :: proc() {
+	arena: vmem.Arena
+	arena_err := vmem.arena_init_growing(&arena)
+	ensure(arena_err == nil)
+	arena_allocator := vmem.arena_allocator(&arena)
+	defer vmem.arena_destroy(&arena) //clean up everything!
+
 	file := Ppm_file{}
 
 	if len(os.args) > 3 || len(os.args) < 2 {
 		print_usage()
 	}
 	filename := os.args[1]
-	if ok, err := load_ppm(&file, filename); !ok {
+	if ok, err := load_ppm(&file, filename, arena_allocator); !ok {
 		fmt.eprintfln("ERROR: Failed to load file '%s': %s ", filename, os.error_string(err))
 		os.exit(1)
 	}
-	ppm_parse(&file)
+	ppm_parse(&file, arena_allocator)
 
 	window_width: i32 = i32(
 		file.width,