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#include <stdio.h>
#include "wasm_c_api.h"
#define own
int main(int argc, const char* argv[]) {
// Initialize.
printf("Initializing...\n");
wasm_engine_t* engine = wasm_engine_new();
wasm_store_t* store = wasm_store_new(engine);
// Load binary.
printf("Loading binary...\n");
#if WASM_ENABLE_AOT != 0 && WASM_ENABLE_INTERP == 0
FILE* file = fopen("empty_imports.aot", "rb");
#else
FILE* file = fopen("empty_imports.wasm", "rb");
#endif
if (!file) {
printf("> Error loading module!\n");
return 1;
}
int ret = fseek(file, 0L, SEEK_END);
if (ret == -1) {
printf("> Error loading module!\n");
fclose(file);
return 1;
}
long file_size = ftell(file);
if (file_size == -1) {
printf("> Error loading module!\n");
fclose(file);
return 1;
}
ret = fseek(file, 0L, SEEK_SET);
if (ret == -1) {
printf("> Error loading module!\n");
fclose(file);
return 1;
}
wasm_byte_vec_t binary;
wasm_byte_vec_new_uninitialized(&binary, file_size);
if (fread(binary.data, file_size, 1, file) != 1) {
printf("> Error loading module!\n");
fclose(file);
return 1;
}
fclose(file);
// Compile.
printf("Compiling module...\n");
own wasm_module_t* module = wasm_module_new(store, &binary);
if (!module) {
printf("> Error compiling module!\n");
return 1;
}
wasm_byte_vec_delete(&binary);
// Instantiate with non-null but empty imports array.
printf("Instantiating module...\n");
wasm_extern_vec_t imports = WASM_EMPTY_VEC;
own wasm_instance_t* instance =
wasm_instance_new(store, module, &imports, NULL);
if (!instance) {
printf("> Error instantiating module!\n");
return 1;
}
// Run an exported function to verify that the instance was created correctly.
printf("Extracting export...\n");
own wasm_extern_vec_t exports;
wasm_instance_exports(instance, &exports);
if (exports.size == 0) {
printf("> Error accessing exports!\n");
return 1;
}
const wasm_func_t* add_func = wasm_extern_as_func(exports.data[0]);
if (add_func == NULL) {
printf("> Error accessing export!\n");
return 1;
}
wasm_module_delete(module);
wasm_instance_delete(instance);
printf("Calling export...\n");
wasm_val_t args[2] = { WASM_I32_VAL(3), WASM_I32_VAL(4) };
wasm_val_vec_t args_vec = WASM_ARRAY_VEC(args);
wasm_val_t results[1] = { WASM_INIT_VAL };
wasm_val_vec_t results_vec = WASM_ARRAY_VEC(results);
wasm_trap_t *trap = wasm_func_call(add_func, &args_vec, &results_vec);
if (trap) {
printf("> Error calling function!\n");
wasm_trap_delete(trap);
return 1;
}
if (results_vec.data[0].of.i32 != 7) {
printf("> Error calling function!\n");
return 1;
}
wasm_extern_vec_delete(&exports);
// Shut down.
printf("Shutting down...\n");
wasm_store_delete(store);
wasm_engine_delete(engine);
// All done.
printf("Done.\n");
return 0;
}
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