From c6d18a701c5dfbe89c0b1f40401548d8163e2841 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Mon, 27 Apr 2026 15:39:55 +0200
Subject: Arg decode simplification, but not ready

---
 examples/poiseulle_particles_2d_bgk_gpu/sim.cpp |  9 +++++++++
 lib/core/c++/args.hpp                           | 15 +++++++++++++--
 lib/core/c++/lbm.hpp                            |  1 +
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp b/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp
index b8ac35e..1a9aa5b 100644
--- a/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp
+++ b/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp
@@ -6,6 +6,7 @@
 #include <forstio/remote/filesystem/easy.hpp>
 #include <forstio/codec/json/json.hpp>
 #include <forstio/codec/simple.hpp>
+#include <forstio/codec/args.hpp>
 
 namespace kel {
 namespace lbm {
@@ -242,6 +243,14 @@ template<typename T, typename Desc>
 saw::error_or<void> lbm_main(int argc, char** argv){
 	using namespace kel::lbm;
 
+	/*
+	auto eo_lbm_args = setup_lbm_env<sch::Args<sch::Struct<>,sch::Tuple<>>>(argc,argv);
+	if(eo_lbm_args.is_error()){
+		return std::move(eo_lbm_args.get_error());
+	}
+	auto& lbm_args = eo_lbm_args.get_value();
+	*/
+
 	using dfi = df_info<T,Desc>;
 
 	auto eo_lbm_dir = output_directory();
diff --git a/lib/core/c++/args.hpp b/lib/core/c++/args.hpp
index 01b4795..a0aa941 100644
--- a/lib/core/c++/args.hpp
+++ b/lib/core/c++/args.hpp
@@ -9,8 +9,19 @@ namespace sch {
 using namespace saw::schema;
 }
 
-saw::error_or<void> init_lbm_env(){
-	return saw::make_void();
+template<typename ArgSchema>
+saw::error_or<saw::data<ArgSchema>> setup_lbm_env(int argc, char** argv){
+	saw::data<ArgSchema,saw::encode::Args> args_data{argc,argv};
+
+	saw::codec<ArgSchema,saw::encode::Args> args_codec;
+
+	saw::data<ArgSchema> args_decoded;
+	auto eov = args_codec.decode(args_data,args_decoded);
+	if(eov.is_error()){
+		return eov;
+	}
+
+	return args_decoded;
 }
 }
 }
diff --git a/lib/core/c++/lbm.hpp b/lib/core/c++/lbm.hpp
index d6a0976..29de83e 100644
--- a/lib/core/c++/lbm.hpp
+++ b/lib/core/c++/lbm.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "args.hpp"
 #include "schema.hpp"
 #include "flatten.hpp"
 #include "chunk.hpp"
-- 
cgit v1.2.3


From c66fc98f1f594a11aeed33efc43c3c308e3eebf9 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Mon, 27 Apr 2026 15:43:09 +0200
Subject: Output csv

---
 examples/poiseulle_particles_2d_bgk_gpu/sim.cpp | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp b/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp
index 1a9aa5b..9cc77ae 100644
--- a/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp
+++ b/examples/poiseulle_particles_2d_bgk_gpu/sim.cpp
@@ -366,22 +366,20 @@ saw::error_or<void> lbm_main(int argc, char** argv){
 			}
 		}
 		*/
-		/*
-		{
+		if(i.get() % 32u == 0u){
 			{
-				auto eov = dev.copy_to_host(lbm_sycl_data,*lbm_data_ptr);
+				auto eov = dev.copy_to_host(lbm_sycl_macro_data,*lbm_macro_data_ptr);
 				if(eov.is_error()){
 					return eov;
 				}
 			}
 			{
-				auto eov = write_csv_file(out_dir,"lbm",i.get(), *lbm_data_ptr);
+				auto eov = write_csv_file(out_dir,"m",i.get(), *lbm_macro_data_ptr);
 				if(eov.is_error()){
 					return eov;
 				}
 			}
 		}
-		*/
 		// Stream
 		sycl_q.submit([&](acpp::sycl::handler& h){
 			component<T,Desc,cmpt::Stream,encode::Sycl<saw::encode::Native>> stream;
-- 
cgit v1.2.3