WASM binary format: support memory imports

3 files changed, 14 insertions, 0 deletions

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
index 430e1ab4..714f1936 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/structure/WasmBinaryFormat.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/WasmBinaryFormat.java
@@ -105,6 +105,10 @@ public class WasmBinaryFormat {
                 writer.writeByte(0x01);
                 writeTableType(table.type(), writer);
             }
+            case WasmImportDescriptor.Memory memory -> {
+                writer.writeByte(0x02);
+                writeMemoryType(memory.type(), writer);
+            }
         }
     }
 
@@ -151,6 +155,10 @@ public class WasmBinaryFormat {
         writeValueTypeVector(type.results(), writer);
     }
 
+    private static void writeMemoryType(WasmMemoryType type, BinaryWriter writer) {
+        writeLimits(type.limits(), writer);
+    }
+
     private static void writeReferenceType(WasmReferenceType type, BinaryWriter writer) {
         var encoding = switch (type) {
             case FUNC_REF -> 0x70;
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/imports/WasmImportDescriptor.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/imports/WasmImportDescriptor.java
index db0ec936..e0bdc456 100644
--- a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/imports/WasmImportDescriptor.java
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/imports/WasmImportDescriptor.java
@@ -1,9 +1,11 @@
 package org.shedlang.compiler.backends.wasm.structure.ast.imports;
 
 import org.shedlang.compiler.backends.wasm.structure.ast.types.WasmFuncType;
+import org.shedlang.compiler.backends.wasm.structure.ast.types.WasmMemoryType;
 import org.shedlang.compiler.backends.wasm.structure.ast.types.WasmTableType;
 
 public sealed interface WasmImportDescriptor {
     record Func(String identifier, WasmFuncType type) implements WasmImportDescriptor {}
     record Table(WasmTableType type) implements WasmImportDescriptor {}
+    record Memory(WasmMemoryType type) implements WasmImportDescriptor {}
 }
diff --git a/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/types/WasmMemoryType.java b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/types/WasmMemoryType.java
new file mode 100644
index 00000000..0517fd3c
--- /dev/null
+++ b/src/main/java/org/shedlang/compiler/backends/wasm/structure/ast/types/WasmMemoryType.java
@@ -0,0 +1,4 @@
+package org.shedlang.compiler.backends.wasm.structure.ast.types;
+
+public record WasmMemoryType(WasmLimits limits) {
+}