First commit

1 files changed, 36 insertions, 0 deletions

diff --git a/src/op/check/uint64.c b/src/op/check/uint64.c
new file mode 100644
index 0000000..a925999
--- /dev/null
+++ b/src/op/check/uint64.c
@@ -0,0 +1,36 @@
+/*
+ * nanowasm, a tiny WebAssembly/Wasm interpreter
+ * Copyright (C) 2023-2025  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 <nanowasm/nw.h>
+#include <nw/io.h>
+#include <nw/ops.h>
+
+static enum nw_state get_value(struct nw_mod *const m)
+{
+    const struct nw_io_cfg *const cfg = &m->cfg.io;
+    struct nw_sm_c *const c = &m->sm.code;
+    const enum nw_state n = nwp_io_read(cfg, &c->io, cfg->user);
+
+    if (n)
+        return n;
+
+    m->next = c->next;
+    return NW_AGAIN;
+}
+
+void nwp_op_check_uint64(struct nw_mod *const m)
+{
+    struct nw_sm_c *const c = &m->sm.code;
+    struct nw_sm_io io = {0};
+
+    io.buf = &c->u;
+    io.n = sizeof (struct nw_leuint64);
+    c->io = io;
+    m->next = get_value;
+}