1 files changed, 37 insertions, 0 deletions
diff --git a/src/interp/stack/read.c b/src/interp/stack/read.c
new file mode 100644
index 0000000..8db6bcc
--- /dev/null
+++ b/src/interp/stack/read.c
@@ -0,0 +1,37 @@
+/*
+ * 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/interp.h>
+#include <nw/log.h>
+#include <nw/stack.h>
+
+enum nw_state nwp_stack_read(struct nw_interp *const i,
+    struct nw_sm_io *const io, const size_t offset)
+{
+    void *const dst = (unsigned char *)io->buf + io->read;
+    const struct nw_interp_cfg *const cfg = &i->cfg;
+    const struct nw_fifo_cfg *const fc = &cfg->stack;
+    const int n = fc->read(offset + io->read, dst, io->n - io->read, cfg->user);
+
+    if (n < 0)
+    {
+        static const char *const exc = "failed to read from stack";
+
+#ifdef NW_LOG
+        nwp_log("%s\n", exc);
+#endif
+        i->exception = exc;
+        return NW_FATAL;
+    }
+    else if ((io->read += n) >= io->n)
+        return NW_OK;
+
+    return NW_AGAIN;
+}