First commit1st

1 files changed, 49 insertions, 0 deletions

diff --git a/src/routines/section/function.c b/src/routines/section/function.c
new file mode 100644
index 0000000..3402df3
--- /dev/null
+++ b/src/routines/section/function.c
@@ -0,0 +1,49 @@
+/*
+ * 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 <nanowasm/nw.h>
+#include <nw/io.h>
+#include <nw/log.h>
+#include <nw/routines.h>
+
+static enum nw_state get_entry(struct nw_mod *const m)
+{
+    struct nw_sm_fn *const fn = &m->sm.function;
+    const struct nw_io_cfg *const cfg = &m->cfg.io;
+    struct nw_sm_leb128 *const l = &fn->leb128;
+    nw_varuint32 type;
+    const enum nw_state n = nwp_varuint32(cfg, l, &type);
+
+    if (n)
+        return n;
+    else if (++fn->entry_i >= fn->count)
+        m->next = nwp_section_exit;
+
+    return NW_AGAIN;
+}
+
+static enum nw_state get_count(struct nw_mod *const m)
+{
+    const struct nw_io_cfg *const cfg = &m->cfg.io;
+    struct nw_sm_fn *const fn = &m->sm.function;
+    struct nw_sm_leb128 *const l = &fn->leb128;
+    const enum nw_state n = nwp_varuint32(cfg, l, &fn->count);
+
+    if (n)
+        return n;
+
+    m->next = get_entry;
+    return NW_AGAIN;
+}
+
+void nwp_section_function(struct nw_mod *const m)
+{
+    m->next = get_count;
+    m->sm.function = (const struct nw_sm_fn){0};
+}