wasm-micro-runtime/samples/native-lib/test_hello.c

/*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */

#include <stdio.h>
#include <stdlib.h>

#include "wasm_export.h"

static int
test_hello_wrapper(wasm_exec_env_t exec_env, const char *name, char *result,
                   size_t resultlen)
{
    return snprintf(result, resultlen, "Hello, %s. This is %s!\n", name,
                    __func__);
}

/* clang-format off */
#define REG_NATIVE_FUNC(func_name, signature) \
    { #func_name, func_name##_wrapper, signature, NULL }

static NativeSymbol native_symbols[] = {
    REG_NATIVE_FUNC(test_hello, "($*~)i")
};
/* clang-format on */

uint32_t
get_native_lib(char **p_module_name, NativeSymbol **p_native_symbols)
{
    *p_module_name = "env";
    *p_native_symbols = native_symbols;
    return sizeof(native_symbols) / sizeof(NativeSymbol);
}