jerry_value_t fs_do_read_or_write(const jerry_value_t jfunc,
const jerry_value_t jthis,
const jerry_value_t jargv[],
const jerry_length_t jargc,
const iotjs_fs_op_t fs_op) {
DJS_CHECK_THIS();
DJS_CHECK_ARGS(5, number, object, number, number, number);
DJS_CHECK_ARG_IF_EXIST(5, function);
const iotjs_environment_t* env = iotjs_environment_get();
int fd = JS_GET_ARG(0, number);
const jerry_value_t jbuffer = JS_GET_ARG(1, object);
size_t offset = JS_GET_ARG(2, number);
size_t length = JS_GET_ARG(3, number);
int position = JS_GET_ARG(4, number);
const jerry_value_t jcallback = JS_GET_ARG_IF_EXIST(5, function);
iotjs_bufferwrap_t* buffer_wrap = iotjs_bufferwrap_from_jbuffer(jbuffer);
char* data = buffer_wrap->buffer;
size_t data_length = iotjs_bufferwrap_length(buffer_wrap);
JS_CHECK(data != NULL && data_length > 0);
if (!IsWithinBounds(offset, length, data_length)) {
return JS_CREATE_ERROR(RANGE, "length out of bound");
}
uv_buf_t uvbuf = uv_buf_init(data + offset, length);
jerry_value_t ret_value;
if (fs_op == IOTJS_FS_READ) {
if (!jerry_value_is_null(jcallback)) {
FS_ASYNC(env, read, jcallback, fd, &uvbuf, 1, position);
} else {
FS_SYNC(env, read, fd, &uvbuf, 1, position);
}
} else {
if (!jerry_value_is_null(jcallback)) {
FS_ASYNC(env, write, jcallback, fd, &uvbuf, 1, position);
} else {
FS_SYNC(env, write, fd, &uvbuf, 1, position);
}
}
return ret_value;
}
// This function should be able to print utf8 encoded string
// as utf8 is internal string representation in Jerryscript
static jerry_value_t Print(const jerry_value_t* jargv,
const jerry_length_t jargc, FILE* out_fd) {
JS_CHECK_ARGS(1, string);
iotjs_string_t msg = JS_GET_ARG(0, string);
const char* str = iotjs_string_data(&msg);
unsigned str_len = iotjs_string_size(&msg);
unsigned idx = 0;
if (iotjs_console_out) {
int level = (out_fd == stdout) ? DBGLEV_INFO : DBGLEV_ERR;
iotjs_console_out(level, "%s", str);
} else {
for (idx = 0; idx < str_len; idx++) {
if (str[idx] != 0) {
fprintf(out_fd, "%c", str[idx]);
} else {
fprintf(out_fd, "\\u0000");
}
}
}
iotjs_string_destroy(&msg);
return jerry_create_undefined();
}
