fix a bug with dirname seg faulting when passed a string literal

it doesnt like things in readonly memory i guess.

now we create an arena for the obj load and create a dynamically allocated copy of the string

1 files changed, 8 insertions, 1 deletions

diff --git a/src/resources/obj.c b/src/resources/obj.c
index 56f885f..c6e9fa6 100644
--- a/src/resources/obj.c
+++ b/src/resources/obj.c
@@ -15,6 +15,7 @@
 #include "file.h"
 #include "log.h"
 #include "maths.h"
+#include "mem.h"
 #include "path.h"
 #include "render.h"
 #include "render_types.h"
@@ -40,8 +41,11 @@ bool model_load_obj_str(const char *file_string, str8 relative_path, model *out_
                         bool invert_textures_y);
 
 model_handle model_load_obj(core *core, const char *path, bool invert_textures_y) {
+  size_t arena_size = 1024;
+  arena scratch = arena_create(malloc(arena_size), arena_size);
+
   TRACE("Loading model at Path %s\n", path);
-  path_opt relative_path = path_parent(path);
+  path_opt relative_path = path_parent(&scratch, path);
   if (!relative_path.has_value) {
     WARN("Couldnt get a relative path for the path to use for loading materials & textures later");
   }
@@ -61,6 +65,9 @@ model_handle model_load_obj(core *core, const char *path, bool invert_textures_y
 
   u32 index = model_darray_len(core->models);
   model_darray_push(core->models, model);
+
+  arena_free_all(&scratch);
+  arena_free_storage(&scratch);
   return (model_handle){ .raw = index };
 }