First commit

1 files changed, 136 insertions, 0 deletions

diff --git a/examples/minimal.c b/examples/minimal.c
new file mode 100644
index 0000000..8812ac5
--- /dev/null
+++ b/examples/minimal.c
@@ -0,0 +1,136 @@
+/*
+ * 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 <stddef.h>
+#include <stdlib.h>
+
+static int io_read(void *const buf, const size_t n, void *const user)
+{
+    return -1;
+}
+
+static enum nw_state io_seek(const long offset, void *const user)
+{
+    return -1;
+}
+
+static enum nw_state io_tell(long *const out, void *const user)
+{
+    return -1;
+}
+
+static int io_eof(void *const user)
+{
+    return -1;
+}
+
+static int push(const void *const src, const size_t n, void *const user)
+{
+    return -1;
+}
+
+static int pop(void *const dst, const size_t n, void *const user)
+{
+    return -1;
+}
+
+static size_t ptr(void *const user)
+{
+    return 0;
+}
+
+static int load(const nw_varuint32 offset, void *const dst, const size_t n,
+    void *const user)
+{
+    return -1;
+}
+
+static int store(const nw_varuint32 offset, const void *const src,
+    const size_t n, void *const user)
+{
+    return -1;
+}
+
+int main(int argc, char *argv[])
+{
+    const struct nw_io_cfg io =
+    {
+        .read = io_read,
+        .seek = io_seek,
+        .tell = io_tell,
+        .eof = io_eof
+    };
+
+    const struct nw_mod_cfg cfg =
+    {
+        .io = io
+    };
+
+    struct nw_mod m;
+    struct nw_mod_out mout;
+
+    nw_init(&m, &cfg);
+
+again:
+
+    switch (nw_load(&m, &mout))
+    {
+        case NW_OK:
+            break;
+
+        case NW_AGAIN:
+            goto again;
+
+        case NW_FATAL:
+            return EXIT_FAILURE;
+    }
+
+    const struct nw_inst_cfg icfg =
+    {
+        .interp_cfg =
+        {
+            .io = io,
+            .m = &m,
+            .stack =
+            {
+                .push = push,
+                .pop = pop,
+                .ptr = ptr
+            },
+
+            .linear =
+            {
+                .load = load,
+                .store = store
+            }
+        }
+    };
+
+    struct nw_inst inst;
+
+    if (nw_start(&inst, &icfg))
+        return EXIT_FAILURE;
+
+again2:
+
+    switch (nw_run(&inst))
+    {
+        case NW_OK:
+            break;
+
+        case NW_AGAIN:
+            goto again2;
+
+        case NW_FATAL:
+            return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}