From 4ebb6355bd2481e844d07a649dce3daa2b9fa881 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sat, 21 Mar 2026 11:25:08 +0000
Subject: Serialize Patio data layouts to Protobuf

---
 .../compiler/patio/protobuf/PatioToProtobuf.java   | 94 +++++++++++++++++++++-
 1 file changed, 90 insertions(+), 4 deletions(-)

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/patio/protobuf/PatioToProtobuf.java b/src/main/java/org/shedlang/compiler/patio/protobuf/PatioToProtobuf.java
index 07b652d8..58157c86 100644
--- a/src/main/java/org/shedlang/compiler/patio/protobuf/PatioToProtobuf.java
+++ b/src/main/java/org/shedlang/compiler/patio/protobuf/PatioToProtobuf.java
@@ -1,10 +1,11 @@
 package org.shedlang.compiler.patio.protobuf;
 
 import org.shedlang.compiler.patio.*;
+import org.shedlang.compiler.patio.types.*;
 import org.shedlang.compiler.sources.Source;
-import org.shedlang.compiler.sources.protobuf.SourceToProtobuf;
 
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 import static org.shedlang.compiler.sources.protobuf.SourceToProtobuf.serializeSource;
 
@@ -68,7 +69,7 @@ public class PatioToProtobuf {
         Source parentSource
     ) {
         var builder = PatioProtobuf.PatioDataElementImmutableDefinition.newBuilder();
-        builder.setSource(SourceToProtobuf.serializeSource(element.source(), parentSource));
+        builder.setSource(serializeSource(element.source(), parentSource));
         builder.setName(element.name());
         builder.setVisibility(serializeVisibility(element.visibility()));
         return builder.build();
@@ -79,7 +80,7 @@ public class PatioToProtobuf {
         Source parentSource
     ) {
         var builder = PatioProtobuf.PatioDataElementMutableDeclaration.newBuilder();
-        builder.setSource(SourceToProtobuf.serializeSource(element.source(), parentSource));
+        builder.setSource(serializeSource(element.source(), parentSource));
         builder.setName(element.name());
         return builder.build();
     }
@@ -89,7 +90,7 @@ public class PatioToProtobuf {
         Source parentSource
     ) {
         var builder = PatioProtobuf.PatioDataElementMutableDefinition.newBuilder();
-        builder.setSource(SourceToProtobuf.serializeSource(element.source(), parentSource));
+        builder.setSource(serializeSource(element.source(), parentSource));
         builder.setName(element.name());
         builder.setVisibility(serializeVisibility(element.visibility()));
         return builder.build();
@@ -101,4 +102,89 @@ public class PatioToProtobuf {
             case PUBLIC -> PatioProtobuf.PatioVisibility.PUBLIC;
         };
     }
+
+    public static PatioProtobuf.PatioDataLayout serializeDataLayout(PatioDataLayout layout) {
+        var builder = PatioProtobuf.PatioDataLayout.newBuilder();
+        switch (layout) {
+            case PatioDataLayoutArray patioDataLayoutArray -> {
+                var arrayBuilder = PatioProtobuf.PatioDataLayoutArray.newBuilder();
+                arrayBuilder.setElement(serializeDataLayout(patioDataLayoutArray.element()));
+                arrayBuilder.setSize(patioDataLayoutArray.size());
+                builder.setArray(arrayBuilder);
+            }
+
+            case PatioDataLayoutBool patioDataLayoutBool -> {
+                builder.setBool(PatioProtobuf.PatioDataLayoutBool.newBuilder().build());
+            }
+
+            case PatioDataLayoutByte patioDataLayoutByte -> {
+                builder.setByte(PatioProtobuf.PatioDataLayoutByte.newBuilder().build());
+            }
+
+            case PatioDataLayoutDataPtr patioDataLayoutDataPtr -> {
+                builder.setDataPtr(PatioProtobuf.PatioDataLayoutDataPtr.newBuilder().build());
+            }
+
+            case PatioDataLayoutFunctionPtr patioDataLayoutFunctionPtr -> {
+                builder.setFunctionPtr(PatioProtobuf.PatioDataLayoutFunctionPtr.newBuilder().build());
+            }
+
+            case PatioDataLayoutInt patioDataLayoutInt -> {
+                builder.setInt(PatioProtobuf.PatioDataLayoutInt.newBuilder().build());
+            }
+
+            case PatioDataLayoutInt32 patioDataLayoutInt32 -> {
+                builder.setInt32(PatioProtobuf.PatioDataLayoutInt32.newBuilder().build());
+            }
+
+            case PatioDataLayoutStruct patioDataLayoutStruct -> {
+                var structBuilder = PatioProtobuf.PatioDataLayoutStruct.newBuilder();
+                for (var element : patioDataLayoutStruct.elements()) {
+                    structBuilder.addElements(serializeDataLayout(element));
+                }
+                builder.setStruct(structBuilder);
+            }
+        }
+
+        return builder.build();
+    }
+
+    public static PatioDataLayout deserializeDataLayout(PatioProtobuf.PatioDataLayout layoutProtobuf) {
+        return switch (layoutProtobuf.getValueCase()) {
+            case ARRAY ->
+                PatioDataLayouts.array(
+                    deserializeDataLayout(layoutProtobuf.getArray().getElement()),
+                    layoutProtobuf.getArray().getSize()
+                );
+
+            case BOOL ->
+                PatioDataLayouts.BOOL;
+
+            case BYTE ->
+                PatioDataLayouts.BYTE;
+
+            case DATA_PTR ->
+                PatioDataLayouts.DATA_PTR;
+
+            case FUNCTION_PTR ->
+                PatioDataLayouts.FUNCTION_PTR;
+
+            case INT ->
+                PatioDataLayouts.INT;
+
+            case INT32 ->
+                PatioDataLayouts.INT32;
+
+            case STRUCT ->
+                PatioDataLayouts.struct(
+                    layoutProtobuf.getStruct().getElementsList().stream()
+                        .map(PatioToProtobuf::deserializeDataLayout)
+                        .collect(Collectors.toList())
+                );
+
+            case VALUE_NOT_SET -> {
+                throw new UnsupportedOperationException("TODO");
+            }
+        };
+    }
 }
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