Add nwp_type_str

This private function allows to decode an enum nw_type to a
human-readable string.

3 files changed, 30 insertions, 0 deletions

diff --git a/private_include/nw/types.h b/private_include/nw/types.h
index 99e6f55..6fb5317 100644
--- a/private_include/nw/types.h
+++ b/private_include/nw/types.h
@@ -15,5 +15,6 @@
 
 int nwp_get_type(nw_varint7 type, enum nw_type *vtype);
 int nwp_type_sz(enum nw_type type, size_t *sz);
+const char *nwp_type_str(enum nw_type type);
 
 #endif
diff --git a/src/types/CMakeLists.txt b/src/types/CMakeLists.txt
index f3f0cb3..aa55802 100644
--- a/src/types/CMakeLists.txt
+++ b/src/types/CMakeLists.txt
@@ -7,5 +7,6 @@
 
 target_sources(${PROJECT_NAME} PRIVATE
     get.c
+    str.c
     sz.c
 )
diff --git a/src/types/str.c b/src/types/str.c
new file mode 100644
index 0000000..f726054
--- /dev/null
+++ b/src/types/str.c
@@ -0,0 +1,28 @@
+/*
+ * 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/types.h>
+#include <stddef.h>
+
+const char *nwp_type_str(const enum nw_type t)
+{
+    static const char *const s[] =
+    {
+        "i32",
+        "i64",
+        "f32",
+        "f64"
+    };
+
+    if (t < 0 || t >= sizeof s / sizeof *s)
+        return NULL;
+
+    return s[t];
+}