First commitfirst-step

1 files changed, 27 insertions, 0 deletions

diff --git a/src/op/if.c b/src/op/if.c
new file mode 100644
index 0000000..526c8f5
--- /dev/null
+++ b/src/op/if.c
@@ -0,0 +1,27 @@
+#include <ops.h>
+#include <interp.h>
+#include <interp_private.h>
+#include <wasm_types.h>
+
+static int op(FILE *const f, struct interp *const i)
+{
+    varint7 sig;
+
+    if (varint7_read(f, &sig))
+    {
+        fprintf(stderr, "%s: varint7_read failed\n", __func__);
+        return -1;
+    }
+
+    return 0;
+}
+
+int op_if(struct interp *const i)
+{
+    return op(i->cfg.f, i);
+}
+
+int check_if(FILE *const f)
+{
+    return op(f, NULL);
+}