From abcddcedb332ac6154c5ef49eab78209a5d07c62 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Tue, 20 Jun 2023 19:22:55 +0100
Subject: Add serialization to binary format of empty WASM module

---
 .../backends/wasm/structure/WasmBinaryFormat.java       | 17 +++++++++++++++++
 .../backends/wasm/structure/ast/WasmModule.java         | 13 +++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 src/main/java/org/shedlang/compiler/backends/wasm/structure/WasmBinaryFormat.java
 create mode 100644 src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/WasmModule.java

(limited to 'src/main/java')

diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/WasmBinaryFormat.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/WasmBinaryFormat.java
new file mode 100644
index 00000000..2ec10c2a
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/WasmBinaryFormat.java
@@ -0,0 +1,17 @@
+package org.shedlang.compiler.backends.wasm.structure;
+
+import org.shedlang.compiler.backends.wasm.structure.ast.WasmModule;
+
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.HexFormat;
+
+public class WasmBinaryFormat {
+    private static final byte[] WASM_MAGIC = HexFormat.of().parseHex("0061736D");
+    private static final byte[] WASM_VERSION = HexFormat.of().parseHex("01000000");
+
+    public static void serializeModule(WasmModule module, FileOutputStream outputStream) throws IOException {
+        outputStream.write(WASM_MAGIC);
+        outputStream.write(WASM_VERSION);
+    }
+}
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/WasmModule.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/WasmModule.java
new file mode 100644
index 00000000..a5827d58
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/WasmModule.java
@@ -0,0 +1,13 @@
+package org.shedlang.compiler.backends.wasm.structure.ast;
+
+public record WasmModule() {
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public record Builder() {
+        public WasmModule build() {
+            return new WasmModule();
+        }
+    }
+}
-- 
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