#include #include "../wasmer.h" #include #include #include int main() { // Read the wasm file bytes FILE *file = fopen("assets/sum.wasm", "r"); fseek(file, 0, SEEK_END); long len = ftell(file); uint8_t *bytes = malloc(len); fseek(file, 0, SEEK_SET); fread(bytes, 1, len, file); fclose(file); wasmer_import_t imports[] = {}; wasmer_instance_t *instance = NULL; wasmer_result_t compile_result = wasmer_instantiate(&instance, bytes, len, imports, 0); printf("Compile result: %d\n", compile_result); assert(compile_result == WASMER_OK); wasmer_value_t param_one; param_one.tag = WASM_I32; param_one.value.I32 = 7; wasmer_value_t param_two; param_two.tag = WASM_I32; param_two.value.I32 = 8; wasmer_value_t params[] = {param_one, param_two}; wasmer_value_t result_one; wasmer_value_t results[] = {result_one}; wasmer_result_t call_result = wasmer_instance_call(instance, "sum", params, 2, results, 1); printf("Call result: %d\n", call_result); printf("Result: %d\n", results[0].value.I32); assert(results[0].value.I32 == 15); assert(call_result == WASMER_OK); wasmer_result_t call_result2 = wasmer_instance_call(instance, "sum", params, 1, results, 1); printf("Call result bad: %d\n", call_result2); assert(call_result2 == WASMER_ERROR); int error_len = wasmer_last_error_length(); printf("Error len: `%d`\n", error_len); char *error_str = malloc(error_len); int error_result = wasmer_last_error_message(error_str, error_len); assert(error_len == error_result); printf("Error str: `%s`\n", error_str); assert(0 == strcmp(error_str, "Call error: Parameters of type [I32] did not match signature [I32, I32] -> [I32]")); free(error_str); printf("Destroy instance\n"); wasmer_instance_destroy(instance); return 0; }