From 71c7fd62f8b5257b82cf32b0f747fcf313fcc617 Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Fri, 6 Nov 2020 18:20:34 +0100
Subject: Prepare Token/Node handling

---
 flowgraph/data.h    |  2 ++
 flowgraph/node.cpp  | 21 +++++++++++++++++++--
 flowgraph/node.h    |  5 ++++-
 flowgraph/storage.h |  5 +++--
 4 files changed, 28 insertions(+), 5 deletions(-)

(limited to 'flowgraph')

diff --git a/flowgraph/data.h b/flowgraph/data.h
index 353567c..1ed4964 100644
--- a/flowgraph/data.h
+++ b/flowgraph/data.h
@@ -1,3 +1,5 @@
+// Basic Data types, abstract (not yet machine specific)
+
 #pragma once
 
 #include <cstdint>
diff --git a/flowgraph/node.cpp b/flowgraph/node.cpp
index fc55ef6..f81a7e1 100644
--- a/flowgraph/node.cpp
+++ b/flowgraph/node.cpp
@@ -2,8 +2,25 @@
 
 #include "data.h"
 
+#include <boost/endian/conversion.hpp>
+
 using namespace FlowGraph;
 
-Data FlowGraph::MakeLocalPointer(const std::string& name) { return Data(DataType::Pointer, std::make_shared<LocalStorage>(name)); }
-Data FlowGraph::MakeLocalSize(const std::string& name) { return Data(DataType::Size, std::make_shared<LocalStorage>(name)); }
+// 4 byte for now
+Data FlowGraph::MakeConstantInt(int i)
+{
+ std::vector<uint8_t> value(size_t(4));
+ *(reinterpret_cast<int32_t*>(value.data())) = boost::endian::native_to_little(static_cast<int32_t>(i));
+ return Data(DataType::Int, std::make_shared<Constant>(value));
+}
+
+Data FlowGraph::MakeLocalPointer(const std::string& name)
+{
+ return Data(DataType::Pointer, std::make_shared<LocalStorage>(name));
+}
+
+Data FlowGraph::MakeLocalSize(const std::string& name)
+{
+ return Data(DataType::Size, std::make_shared<LocalStorage>(name));
+}
 
diff --git a/flowgraph/node.h b/flowgraph/node.h
index 37af95a..40846e2 100644
--- a/flowgraph/node.h
+++ b/flowgraph/node.h
@@ -1,3 +1,5 @@
+// Nodes in flow graph: Abstract Operations
+
 #pragma once
 
 #include "data.h"
@@ -36,6 +38,7 @@ namespace FlowGraph {
   Data m_location; // in: Pointer
  };
 
+ Data MakeConstantInt(int i);
  Data MakeLocalPointer(const std::string& name);
  Data MakeLocalSize(const std::string& name);
 
@@ -147,4 +150,4 @@ namespace FlowGraph {
   Data m_source1;
  };
 
-}
+} // namespace FlowGraph
diff --git a/flowgraph/storage.h b/flowgraph/storage.h
index c2fa7c5..efd7d52 100644
--- a/flowgraph/storage.h
+++ b/flowgraph/storage.h
@@ -1,3 +1,4 @@
+// Different kinds of abstract storage locations: Constants, Global and Local Storage, Temporaries, ...
 #pragma once
 
 #include "data.h"
@@ -15,13 +16,13 @@ namespace FlowGraph {
  class Storage
  {
  public:
-  virtual ~Storage() {} // force class to be polymorphic
+  virtual ~Storage() {} // force class to be polymorphic, for smart pointers
  };
 
  class Constant: public Storage
  {
  public:
-  Constant(std::vector<uint8_t> value) {} // little endian data
+  Constant(std::vector<uint8_t>& value): m_value(value) {} // little endian data
   const std::vector<uint8_t>& value() const { return m_value; }
  private:
   std::vector<uint8_t> m_value;
-- 
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