Function main

examples/memory.c:123–261

}

int main() {
  // Initialize.
  printf("Initializing...\n");
  wasm_engine_t *engine = wasm_engine_new();
  wasmtime_store_t *store = wasmtime_store_new(engine, NULL, NULL);
  wasmtime_context_t *context = wasmtime_store_context(store);

  // Load our input file to parse it next
  FILE *file = fopen("examples/memory.wat", "r");
  if (!file) {
    printf("> Error loading file!\n");
    return 1;
  }
  fseek(file, 0L, SEEK_END);
  size_t file_size = ftell(file);
  fseek(file, 0L, SEEK_SET);
  wasm_byte_vec_t wat;
  wasm_byte_vec_new_uninitialized(&wat, file_size);
  if (fread(wat.data, file_size, 1, file) != 1) {
    printf("> Error loading module!\n");
    return 1;
  }
  fclose(file);

  // Parse the wat into the binary wasm format
  wasm_byte_vec_t binary;
  wasmtime_error_t *error = wasmtime_wat2wasm(wat.data, wat.size, &binary);
  if (error != NULL)
    exit_with_error("failed to parse wat", error, NULL);
  wasm_byte_vec_delete(&wat);

  // Compile.
  printf("Compiling module...\n");
  wasmtime_module_t *module = NULL;
  error =
      wasmtime_module_new(engine, (uint8_t *)binary.data, binary.size, &module);
  if (error)
    exit_with_error("failed to compile module", error, NULL);
  wasm_byte_vec_delete(&binary);

  // Instantiate.
  printf("Instantiating module...\n");
  wasmtime_instance_t instance;
  wasm_trap_t *trap = NULL;
  error = wasmtime_instance_new(context, module, NULL, 0, &instance, &trap);
  if (error != NULL || trap != NULL)
    exit_with_error("failed to instantiate", error, trap);
  wasmtime_module_delete(module);

  // Extract export.
  printf("Extracting exports...\n");
  wasmtime_memory_t memory;
  wasmtime_func_t size_func, load_func, store_func;
  wasmtime_extern_t item;
  bool ok;
  ok = wasmtime_instance_export_get(context, &instance, "memory",
                                    strlen("memory"), &item);
  assert(ok && item.kind == WASMTIME_EXTERN_MEMORY);