First commit

1 files changed, 44 insertions, 0 deletions

diff --git a/src/op/memory/current_memory.c b/src/op/memory/current_memory.c
new file mode 100644
index 0000000..c67d425
--- /dev/null
+++ b/src/op/memory/current_memory.c
@@ -0,0 +1,44 @@
+/*
+ * nanowasm, a tiny WebAssembly/Wasm interpreter
+ * Copyright (C) 2023-2024  Xavier Del Campo Romero
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <nw/log.h>
+#include <nw/ops.h>
+#include <nanowasm/nw.h>
+#include <nw/types.h>
+#include <stddef.h>
+#include <stdio.h>
+
+static int op(struct nw_interp *const i, FILE *const f)
+{
+    varuint1 reserved;
+
+    if (varuint1_read(f, &reserved))
+    {
+        LOG("%s: varuint1_read failed\n", __func__);
+        return 1;
+    }
+    else if (reserved)
+    {
+        LOG("%s: unexpected non-zero reserved value %u\n",
+            __func__, (unsigned)reserved);
+        return 1;
+    }
+
+    return 0;
+}
+
+int op_current_memory(struct nw_interp *const i)
+{
+    return op(i, i->f);
+}
+
+int check_current_memory(FILE *const f)
+{
+    return op(NULL, f);
+}