From 6d9d80362f9932bbc87e162b8ef7df06c73e27e1 Mon Sep 17 00:00:00 2001
From: Xavier Del Campo Romero <xavi.dcr@tutanota.com>
Date: Sat, 7 Sep 2024 00:04:38 +0200
Subject: First commit

---
 src/interp/routines/full.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 src/interp/routines/full.c

(limited to 'src/interp/routines/full.c')

diff --git a/src/interp/routines/full.c b/src/interp/routines/full.c
new file mode 100644
index 0000000..c00f11f
--- /dev/null
+++ b/src/interp/routines/full.c
@@ -0,0 +1,63 @@
+/*
+ * 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 <nw/interp.h>
+#include <nw/io.h>
+#include <nw/log.h>
+#include <nw/opcodes.h>
+#include <nw/ops.h>
+#include <nw/routines.h>
+
+static enum nw_state tell(struct nw_interp *const i)
+{
+    long offset;
+    struct nw_i_sm_b *const b = &i->sm.bytecode;
+    static const char *const exc = "invalid opcode";
+    const struct nw_io_cfg *const cfg = &i->cfg.io;
+    const enum nw_state n = cfg->tell(&offset, cfg->user);
+
+    if (n)
+        return n;
+
+    offset -= sizeof b->op;
+
+#ifdef NW_LOG
+    nwp_log("%s: %#x, offset=%#lx\n", exc, (unsigned)b->op, offset);
+#endif
+    i->exception = exc;
+    return NW_FATAL;
+}
+
+static enum nw_state get_bytecode(struct nw_interp *const i)
+{
+    struct nw_i_sm_b *const b = &i->sm.bytecode;
+    const struct nw_io_cfg *const cfg = &i->cfg.io;
+    const enum nw_state n = nwp_io_read(cfg, &b->io, cfg->user);
+
+    if (n)
+        return n;
+    else if (b->op >= nwp_ops.n || !(b->f = nwp_ops.ops[b->op]))
+    {
+        i->next = tell;
+        return NW_AGAIN;
+    }
+
+    i->next = nwp_execute;
+    return NW_AGAIN;
+}
+
+void nwp_interp_full(struct nw_interp *const i)
+{
+    struct nw_i_sm_b *const pb = &i->sm.bytecode, b = {0};
+
+    b.io.buf = &pb->op;
+    b.io.n = sizeof pb->op;
+    *pb = b;
+    i->next = get_bytecode;
+}
-- 
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