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// Copyright (c) 2017 Akos Kiss.
//
// Licensed under the BSD 3-Clause License
// <LICENSE.md or https://opensource.org/licenses/BSD-3-Clause>.
// This file may not be copied, modified, or distributed except
// according to those terms.
use std::error::Error;
use std::ffi::{CStr, CString};
use std::sync::atomic::{AtomicUsize, Ordering};
use std::{thread, time};
use framework::{cb, nil, ns};
use objc::runtime::Object;
pub const NOT_SUPPORTED_ERROR: &'static str = "Error! Not supported by blurmac!";
pub const NO_PERIPHERAL_FOUND: &'static str = "Error! No peripheral found!";
pub const NO_SERVICE_FOUND: &'static str = "Error! No service found!";
pub const NO_CHARACTERISTIC_FOUND: &'static str = "Error! No characteristic found!";
pub mod nsx {
use super::*;
pub fn string_to_string(nsstring: *mut Object) -> String {
if nsstring == nil {
return String::from("nil");
}
unsafe {
String::from(
CStr::from_ptr(ns::string_utf8string(nsstring))
.to_str()
.unwrap(),
)
}
}
pub fn string_from_str(string: &str) -> *mut Object {
let cstring = CString::new(string).unwrap();
ns::string(cstring.as_ptr())
}
}
pub mod cbx {
use super::*;
pub fn uuid_to_canonical_uuid_string(cbuuid: *mut Object) -> String {
// NOTE: CoreBluetooth tends to return uppercase UUID strings, and only 4 character long if the
// UUID is short (16 bits). However, WebBluetooth mandates lowercase UUID strings. And Servo
// seems to compare strings, not the binary representation.
let uuid = nsx::string_to_string(cb::uuid_uuidstring(cbuuid));
let long = if uuid.len() == 4 {
format!("0000{}-0000-1000-8000-00805f9b34fb", uuid)
} else {
uuid
};
long.to_lowercase()
}
pub fn peripheral_debug(peripheral: *mut Object) -> String {
if peripheral == nil {
return String::from("nil");
}
let name = cb::peripheral_name(peripheral);
let uuid = ns::uuid_uuidstring(cb::peer_identifier(peripheral));
if name != nil {
format!(
"CBPeripheral({}, {})",
nsx::string_to_string(name),
nsx::string_to_string(uuid)
)
} else {
format!("CBPeripheral({})", nsx::string_to_string(uuid))
}
}
pub fn service_debug(service: *mut Object) -> String {
if service == nil {
return String::from("nil");
}
let uuid = cb::uuid_uuidstring(cb::attribute_uuid(service));
format!("CBService({})", nsx::string_to_string(uuid))
}
pub fn characteristic_debug(characteristic: *mut Object) -> String {
if characteristic == nil {
return String::from("nil");
}
let uuid = cb::uuid_uuidstring(cb::attribute_uuid(characteristic));
format!("CBCharacteristic({})", nsx::string_to_string(uuid))
}
}
pub mod wait {
use super::*;
pub type Timestamp = u64;
static TIMESTAMP: AtomicUsize = AtomicUsize::new(0);
pub fn get_timestamp() -> Timestamp {
TIMESTAMP.fetch_add(1, Ordering::SeqCst) as u64
}
pub fn now() -> *mut Object {
ns::number_withunsignedlonglong(get_timestamp())
}
pub fn wait_or_timeout<F>(mut f: F) -> Result<(), Box<dyn Error>>
where
F: FnMut() -> bool,
{
let now = time::Instant::now();
while !f() {
thread::sleep(time::Duration::from_secs(1));
if now.elapsed().as_secs() > 30 {
return Err(Box::from("timeout"));
}
}
Ok(())
}
}
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