From 2c0f29a89263b7a0404334ee6b5a93bf5995d808 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Sun, 5 Jul 2026 11:25:22 +0100
Subject: Support Int64 in java-transient-0

---
 .../javatransient0/JavaTransient0Generator.java    | 52 +++++++++++++++-------
 1 file changed, 37 insertions(+), 15 deletions(-)

(limited to 'src')

diff --git a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java
index b18c30a..9d8a428 100644
--- a/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java
+++ b/src/main/java/org/zwobble/hobgoblin/compiler/output/generators/javatransient0/JavaTransient0Generator.java
@@ -191,6 +191,8 @@ public class JavaTransient0Generator implements Generator {
             case SimpleNativeType simpleNativeType ->  {
                 if (simpleNativeType.equals(NativeTypes.INT_32)) {
                     yield generateEncodeInt32(value);
+                } else if (simpleNativeType.equals(NativeTypes.INT_64)) {
+                    yield generateEncodeInt64(value);
                 } else {
                     throw new UnsupportedOperationException("TODO");
                 }
@@ -227,6 +229,8 @@ public class JavaTransient0Generator implements Generator {
             case SimpleNativeType simpleNativeType ->  {
                 if (simpleNativeType.equals(NativeTypes.INT_32)) {
                     yield generateDecodeInt32(target);
+                } else if (simpleNativeType.equals(NativeTypes.INT_64)) {
+                    yield generateDecodeInt64(target);
                 } else {
                     throw new UnsupportedOperationException("TODO");
                 }
@@ -260,26 +264,44 @@ public class JavaTransient0Generator implements Generator {
         return generateDecodeInt(target, 32, JavaTypeRef.INT);
     }
 
+    private static Stream<JavaBlockStatement> generateEncodeInt64(JavaExpression value) {
+        return generateEncodeInt(value, 64);
+    }
+
+    private static Stream<JavaBlockStatement> generateDecodeInt64(
+        JavaIdentifier target
+    ) {
+        return generateDecodeInt(target, 64, JavaTypeRef.INT);
+    }
+
     private static Stream<JavaBlockStatement> generateEncodeInt(
         JavaExpression value,
         int bits
     ) {
         return byteIndicesInBits(bits)
-            .mapToObj(shiftBy -> new JavaExpressionStatement(
-                new JavaMethodCall(
-                    new JavaRef(OUTPUT_STREAM_NAME),
-                    JavaIdentifier.of("write"),
-                    List.of(new JavaBinaryOperation(
-                        JavaBinaryOperator.BITWISE_AND,
-                        new JavaBinaryOperation(
-                            JavaBinaryOperator.UNSIGNED_RIGHT_SHIFT,
-                            value,
-                            new JavaIntegerLiteral(shiftBy)
-                        ),
-                        new JavaIntegerLiteral(0xff)
-                    ))
-                )
-            ));
+            .mapToObj(shiftBy -> {
+                JavaExpression byteToWrite = new JavaBinaryOperation(
+                    JavaBinaryOperator.BITWISE_AND,
+                    new JavaBinaryOperation(
+                        JavaBinaryOperator.UNSIGNED_RIGHT_SHIFT,
+                        value,
+                        new JavaIntegerLiteral(shiftBy)
+                    ),
+                    new JavaIntegerLiteral(0xff)
+                );
+
+                if (bits > 32) {
+                    byteToWrite = new JavaCast(JavaTypeRef.INT, byteToWrite);
+                }
+
+                return new JavaExpressionStatement(
+                    new JavaMethodCall(
+                        new JavaRef(OUTPUT_STREAM_NAME),
+                        JavaIdentifier.of("write"),
+                        List.of(byteToWrite)
+                    )
+                );
+            });
     }
 
     private static Stream<JavaBlockStatement> generateDecodeInt(
-- 
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