update: redesigning ctx functions and structure

src/package/package.c

@@ -47,6 +47,13 @@ bool lm_package_remove_download(lm_pkg_t *pkg){
   return true;
 }
 
+bool lm_package_is_same(lm_pkg_t *one, lm_pkg_t *two){
+  return eq(one->version, two->version) &&
+         eq(one->name, two->name) &&
+         eq(one->desc, two->desc) &&
+         one->size == two->size;
+}
+
 void lm_package_free(lm_pkg_t *pkg){
   lm_package_data_free(pkg);
   bzero(pkg, sizeof(lm_pkg_t));