/usr/include/lo/lo_cpp.h is in liblo-dev 0.28-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#define _LO_CPP_H_
#include <lo/lo.h>
#include <lo/lo_throw.h>
#include <functional>
#include <memory>
#include <list>
#include <unordered_map>
#include <string>
#include <sstream>
#include <initializer_list>
#define LO_ADD_METHOD_RT(ht, argtypes, args, rt, r, r1, r2) \
template <typename H> \
auto add_method(const string_type path, const string_type types, H&& h) \
-> rt const \
{ \
std::string key = std::string(path._s?:"") + "," + (types._s?:""); \
_handlers[key].push_front( \
std::unique_ptr<handler>(new handler_type<r ht>(h))); \
_add_method(path, types, \
[](const char *path, const char *types, \
lo_arg **argv, int argc, void *msg, \
void *data)->int \
{ \
r1 (*static_cast<handler_type<r ht>*>(data)) args; \
r2; \
}, _handlers[key].front().get()); \
}
#define RT_INT(argtypes) \
typename std::enable_if<std::is_same<decltype(h argtypes), int>::value, void>::type
#define RT_VOID(argtypes) \
typename std::enable_if<std::is_same<decltype(h argtypes), void>::value, void>::type
#define LO_ADD_METHOD(ht, argtypes, args) \
LO_ADD_METHOD_RT(ht, argtypes, args, \
RT_INT(argtypes), int, return,); \
LO_ADD_METHOD_RT(ht, argtypes, args, \
RT_VOID(argtypes), void, , return 0)
namespace lo {
// Helper classes to allow polymorphism on "const char *",
// "std::string", and "int".
class string_type {
public:
string_type(const char *s=0) { _s = s; }
string_type(const std::string &s) { _s = s.c_str(); }
operator const char*() const { return _s; }
const char *_s;
};
class num_string_type : public string_type {
public:
num_string_type(const char *s) : string_type(s) {}
num_string_type(const std::string &s) : string_type(s) {}
num_string_type(int n) { std::ostringstream ss; ss << n;
_p.reset(new std::string(ss.str())); _s = _p->c_str(); }
std::unique_ptr<std::string> _p;
};
class ServerThread;
class Address
{
public:
Address(const string_type &host, const num_string_type &port,
int proto=LO_UDP)
{ address = lo_address_new_with_proto(proto, host, port); owned=true; }
Address(const string_type &url)
{ address = lo_address_new_from_url(url); owned=true; }
Address(lo_address a, bool _owned=true)
{ address = a; owned=_owned; }
~Address()
{ if (address && owned) lo_address_free(address); }
Address& operator=(Address b) { b.swap(*this); return *this; }
void swap(Address& b) throw () { std::swap(this->address, b.address); }
int ttl() const
{ return lo_address_get_ttl(address); }
void set_ttl(int ttl)
{ lo_address_set_ttl(address, ttl); }
int send(const string_type &path) const
{ return lo_send(address, path, ""); }
// In these functions we append "$$" to the type string, which
// simply instructs lo_message_add_varargs() not to use
// LO_MARKER checking at the end of the argument list.
int send(const string_type &path, const string_type &type, ...) const
{
va_list q;
va_start(q, type);
lo_message m = lo_message_new();
std::string t = std::string(type) + "$$";
lo_message_add_varargs(m, t.c_str(), q);
int r = lo_send_message(address, path, m);
lo_message_free(m);
return r;
}
int send(lo_timetag ts, const string_type &path,
const string_type &type, ...) const
{
va_list q;
va_start(q, type);
lo_message m = lo_message_new();
std::string t = std::string(type) + "$$";
lo_message_add_varargs(m, t.c_str(), q);
lo_bundle b = lo_bundle_new(ts);
lo_bundle_add_message(b, path, m);
int r = lo_send_bundle(address, b);
lo_bundle_free_messages(b);
return r;
}
int send(const string_type &path, lo_message m) const
{ return lo_send_message(address, path, m); }
int send(lo_bundle b)
{ return lo_send_bundle(address, b); }
int send_from(lo::ServerThread &from, const string_type &path,
const string_type &type, ...) const;
int send_from(lo_server from, const string_type &path,
const string_type &type, ...) const
{
va_list q;
va_start(q, type);
lo_message m = lo_message_new();
std::string t = std::string(type) + "$$";
lo_message_add_varargs(m, t.c_str(), q);
int r = lo_send_message_from(address, from, path, m);
lo_message_free(m);
return r;
}
int send_from(lo_server from, lo_timetag ts,
const string_type &path,
const string_type &type, ...) const
{
va_list q;
va_start(q, type);
lo_message m = lo_message_new();
std::string t = std::string(type) + "$$";
lo_message_add_varargs(m, t.c_str(), q);
lo_bundle b = lo_bundle_new(ts);
lo_bundle_add_message(b, path, m);
int r = lo_send_bundle_from(address, from, b);
lo_bundle_free_messages(b);
return r;
}
int send_from(lo_server from, const string_type &path, lo_message m) const
{ return lo_send_message_from(address, from, path, m); }
int send(lo_server from, lo_bundle b) const
{ return lo_send_bundle_from(address, from, b); }
int get_errno() const
{ return lo_address_errno(address); }
std::string errstr() const
{ return std::string(lo_address_errstr(address)?:""); }
std::string hostname() const
{ return std::string(lo_address_get_hostname(address)?:""); }
std::string port() const
{ return std::string(lo_address_get_port(address)?:""); }
int protocol() const
{ return lo_address_get_protocol(address); }
std::string url() const
{ return std::string(lo_address_get_url(address)?:""); }
std::string iface() const
{ return std::string(lo_address_get_iface(address)?:""); }
void set_iface(const string_type &iface, const string_type &ip)
{ lo_address_set_iface(address, iface._s?:0, ip._s?:0); }
int set_tcp_nodelay(int enable)
{ return lo_address_set_tcp_nodelay(address, enable); }
int set_stream_slip(int enable)
{ return lo_address_set_stream_slip(address, enable); }
operator lo_address() const
{ return address; }
protected:
lo_address address;
bool owned;
};
class Message
{
public:
Message()
: message(lo_message_new()) { lo_message_incref(message); }
Message(lo_message m)
: message(m) { if (m) { lo_message_incref(m); } }
Message(const Message &m)
: message(m.message) { if (m.message)
lo_message_incref(m.message); }
Message(const string_type &types, ...)
{
message = lo_message_new();
lo_message_incref(message);
va_list q;
va_start(q, types);
std::string t(std::string(types)+"$$");
add_varargs(t.c_str(), q);
}
~Message()
{ if (message) lo_message_free(message); }
Message& operator=(Message m) { m.swap(*this); return *this; }
void swap(Message& m) throw () { std::swap(this->message, m.message); }
int add(const string_type &types, ...)
{
va_list q;
va_start(q, types);
std::string t(std::string(types)+"$$");
return add_varargs(t.c_str(), q);
}
int add_varargs(const string_type &types, va_list ap)
{ return lo_message_add_varargs(message, types, ap); }
int add_int32(int32_t a)
{ return lo_message_add_int32(message, a); }
int add_float(float a)
{ return lo_message_add_float(message, a); }
int add_string(const string_type &a)
{ return lo_message_add_string(message, a); }
int add_blob(lo_blob a)
{ return lo_message_add_blob(message, a); }
int add_int64(int64_t a)
{ return lo_message_add_int64(message, a); }
int add_timetag(lo_timetag a)
{ return lo_message_add_timetag(message, a); }
int add_double(double a)
{ return lo_message_add_double(message, a); }
int add_symbol(const string_type &a)
{ return lo_message_add_symbol(message, a); }
int add_char(char a)
{ return lo_message_add_char(message, a); }
int add_midi(uint8_t a[4])
{ return lo_message_add_midi(message, a); }
int add_bool(bool b)
{ if (b)
return lo_message_add_true(message);
else
return lo_message_add_false(message); }
int add_true()
{ return lo_message_add_true(message); }
int add_false()
{ return lo_message_add_false(message); }
int add_nil()
{ return lo_message_add_nil(message); }
int add_infinitum()
{ return lo_message_add_infinitum(message); }
// Note, for polymorphic versions of "add", below, we can't do
// this for "string" or "symbol" types, since it is ambiguous
// with "add(types, ...)" above.
int add(int32_t a)
{ return lo_message_add_int32(message, a); }
int add(float a)
{ return lo_message_add_float(message, a); }
int add(lo_blob a)
{ return lo_message_add_blob(message, a); }
int add(int64_t a)
{ return lo_message_add_int64(message, a); }
int add(lo_timetag a)
{ return lo_message_add_timetag(message, a); }
int add(double a)
{ return lo_message_add_double(message, a); }
int add(char a)
{ return lo_message_add_char(message, a); }
int add(uint8_t a[4])
{ return lo_message_add_midi(message, a); }
int add(bool b)
{ if (b)
return lo_message_add_true(message);
else
return lo_message_add_false(message); }
Address source() const
{ return Address(lo_message_get_source(message), false); }
lo_timetag timestamp() const
{ return lo_message_get_timestamp(message); }
std::string types() const
{ return std::string(lo_message_get_types(message)?:""); }
int argc() const
{ return lo_message_get_argc(message); }
lo_arg **argv() const
{ return lo_message_get_argv(message); }
size_t length(const string_type &path) const
{ return lo_message_length(message, path); }
void *serialise(const string_type &path, void *to, size_t *size) const
{ return lo_message_serialise(message, path, to, size); }
typedef std::pair<int, Message> maybe;
static
maybe deserialise(void *data, size_t size)
{ int result = 0;
lo_message m = lo_message_deserialise(data, size, &result);
return maybe(result, m); }
void print() const
{ lo_message_pp(message); }
lo::Message clone() const
{ return lo::Message(lo_message_clone(message)); }
operator lo_message() const
{ return message; }
protected:
lo_message message;
};
class Server
{
public:
Server(lo_server s) : server(s) {}
template <typename E>
Server(const num_string_type &port, E&& e)
: Server(lo_server_new(port,
[](int num, const char *msg, const char *where){
auto h = static_cast<handler_error*>(lo_error_get_context());
(*h)(num, msg, where);
}))
{
if (server) {
lo_server_set_error_context(server,
(_error_handler = std::unique_ptr<handler>(
new handler_error(e))).get());
}
}
template <typename E>
Server(const num_string_type &port, int proto, E&& e=0)
: Server(lo_server_new_with_proto(port, proto,
[](int num, const char *msg, const char *where){
auto h = static_cast<handler_error*>(lo_error_get_context());
(*h)(num, msg, where);
}))
{
if (server) {
lo_server_set_error_context(server,
(_error_handler = std::unique_ptr<handler>(
new handler_error(e))).get());
}
}
template <typename E>
Server(const string_type &group, const num_string_type &port,
const string_type &iface=0, const string_type &ip=0, E&& e=0)
: Server((!iface._s || !ip._s)
? lo_server_new_multicast_iface(group, port, iface, ip,
[](int num, const char *msg, const char *where){
auto h = static_cast<handler_error*>(lo_error_get_context());
(*h)(num, msg, where);
})
: lo_server_new_multicast(group, port,
[](int num, const char *msg, const char *where){
auto h = static_cast<handler_error*>(lo_error_get_context());
(*h)(num, msg, where);
}))
{
if (server) {
lo_server_set_error_context(server,
(_error_handler = std::unique_ptr<handler>(
new handler_error(e))).get());
}
}
Server(const num_string_type &port, lo_err_handler err_h=0)
: Server(lo_server_new(port, err_h)) {}
Server(const num_string_type &port, int proto, lo_err_handler err_h=0)
: Server(lo_server_new_with_proto(port, proto, err_h)) {}
Server(const string_type &group, const num_string_type &port,
const string_type &iface="", const string_type &ip="", lo_err_handler err_h=0)
: Server((iface._s || ip._s)
? lo_server_new_multicast_iface(group, port,
iface._s?:0,
ip._s?:0, err_h)
: lo_server_new_multicast(group, port, err_h)) {}
virtual ~Server()
{ if (server) lo_server_free(server); }
bool is_valid() const { return server!=nullptr; }
// Regular old liblo method handlers
void add_method(const string_type &path, const string_type &types,
lo_method_handler h, void *data) const
{ _add_method(path, types, h, data); }
// Alternative callback prototypes
LO_ADD_METHOD( (const char*, const char*, lo_arg**, int),
((char*)0, (char*)0, (lo_arg**)0, (int)0),
(path, types, argv, argc) );
LO_ADD_METHOD( (const char*, lo_arg**, int),
((char*)0, (lo_arg**)0, (int)0),
(types, argv, argc) );
LO_ADD_METHOD( (const char*, lo_arg**, int, const Message&),
((char*)0, (lo_arg**)0, (int)0, Message((lo_message)0)),
(types, argv, argc, Message(msg)) );
LO_ADD_METHOD( (const char*, const Message&),
((char*)0, Message((lo_message)0)),
(path, Message(msg)) );
LO_ADD_METHOD( (lo_arg**, int), ((lo_arg**)0, (int)0), (argv, argc) )
LO_ADD_METHOD( (lo_arg**, int, const Message& ),
((lo_arg**)0, (int)0, Message((lo_message)0)),
(argv, argc, Message(msg)) );
LO_ADD_METHOD( (const Message&),
(Message((lo_message)0)),
(Message(msg)) );
LO_ADD_METHOD( (), (), () );
void del_method(const string_type &path, const string_type &typespec)
{
_handlers.erase(std::string(path._s?:"") + ","
+ (typespec._s?:""));
lo_server_del_method(server, path, typespec);
}
int dispatch_data(void *data, size_t size)
{ return lo_server_dispatch_data(server, data, size); }
int wait(int timeout)
{ return lo_server_wait(server, timeout); }
int recv()
{ return lo_server_recv(server); }
int recv(int timeout)
{ return lo_server_recv_noblock(server, timeout); }
int add_bundle_handlers(lo_bundle_start_handler sh,
lo_bundle_end_handler eh,
void *user_data)
{
return lo_server_add_bundle_handlers(server, sh, eh, user_data);
}
template <typename S, typename E>
int add_bundle_handlers(S&& s, E&& e)
{
_bundle_handlers.reset(new std::pair<handler_bundle_start,
handler_bundle_end>(
handler_bundle_start(s),
handler_bundle_end(e)));
return lo_server_add_bundle_handlers(
server,
[](lo_timetag time, void *user_data)->int{
auto h = (std::pair<handler_bundle_start,
handler_bundle_end>*) user_data;
h->first(time);
return 0;
},
[](void *user_data)->int{
auto h = (std::pair<handler_bundle_start,
handler_bundle_end>*) user_data;
h->second();
return 0;
},
_bundle_handlers.get());
}
int socket_fd() const
{ return lo_server_get_socket_fd(server); }
int port() const
{ return lo_server_get_port(server); }
int protocol() const
{ return lo_server_get_protocol(server); }
std::string url() const
{ return std::string(lo_server_get_url(server)?:""); }
int enable_queue(int queue_enabled,
int dispatch_remaining=1)
{ return lo_server_enable_queue(server,
queue_enabled,
dispatch_remaining); }
int events_pending() const
{ return lo_server_events_pending(server); }
double next_event_delay() const
{ return lo_server_next_event_delay(server); }
operator lo_server() const
{ return server; }
protected:
lo_server server;
friend class ServerThread;
class handler {};
template <typename T>
class handler_type : public handler, public std::function<T> {
public: template<typename H>handler_type(H&& h) : std::function<T>(h) {}
};
typedef handler_type<void(int, const char *, const char *)> handler_error;
typedef handler_type<void(int, const std::string&, const std::string&)> handler_error_s;
typedef handler_type<void(lo_timetag)> handler_bundle_start;
typedef handler_type<void()> handler_bundle_end;
// Keep std::functions here so they are freed correctly
std::unordered_map<std::string,
std::list<std::unique_ptr<handler>>> _handlers;
std::unique_ptr<handler> _error_handler;
std::unique_ptr<std::pair<handler_bundle_start,
handler_bundle_end>> _bundle_handlers;
virtual void _add_method(const char *path, const char *types,
lo_method_handler h, void *data) const
{
lo_server_add_method(server, path, types, h, data);
}
};
class ServerThread : public Server
{
public:
ServerThread(const num_string_type &port, lo_err_handler err_h=0)
: Server(lo_server_thread_get_server(
server_thread = lo_server_thread_new(port, err_h))) {}
template <typename E>
ServerThread(const num_string_type &port, E&& e)
: Server(lo_server_thread_get_server(
server_thread = lo_server_thread_new(port,
[](int num, const char *msg, const char *where){
auto h = static_cast<handler_error*>(lo_error_get_context());
(*h)(num, msg, where);})))
{
if (server_thread) {
auto h = new handler_error(e);
_error_handler.reset(h);
lo_server_thread_set_error_context(server_thread, h);
}
}
ServerThread(const num_string_type &port, int proto, lo_err_handler err_h)
: Server(lo_server_thread_get_server(
server_thread = lo_server_thread_new_with_proto(port, proto, err_h))) {}
virtual ~ServerThread()
{ server = 0;
if (server_thread) lo_server_thread_free(server_thread); }
void start() { lo_server_thread_start(server_thread); }
void stop() { lo_server_thread_stop(server_thread); }
operator lo_server_thread() const
{ return server_thread; }
protected:
lo_server_thread server_thread;
// Regular old liblo method handlers
virtual void _add_method(const char *path, const char *types,
lo_method_handler h, void *data) const
{
lo_server_thread_add_method(server_thread, path, types, h, data);
}
};
// This function needed since lo::ServerThread doesn't
// properly auto-upcast to lo::Server -> lo_server. (Because
// both lo_server and lo_serverthread are typedef'd as void*)
int Address::send_from(lo::ServerThread &from, const string_type &path,
const string_type &type, ...) const
{
va_list q;
va_start(q, type);
lo_message m = lo_message_new();
std::string t = std::string(type) + "$$";
lo_message_add_varargs(m, t.c_str(), q);
lo_server s = static_cast<lo::Server&>(from);
int r = lo_send_message_from(address, s, path, m);
lo_message_free(m);
return r;
}
class Blob
{
public:
Blob(int32_t size, const void *data=0)
: blob(lo_blob_new(size, data)) {}
template <typename T>
Blob(const T &t)
: blob(lo_blob_new(t.size()*sizeof(t[0]), &t[0])) {}
virtual ~Blob()
{ lo_blob_free(blob); }
Blob& operator=(Blob b) { b.swap(*this); return *this; }
void swap(Blob& b) throw () { std::swap(this->blob, b.blob); }
uint32_t datasize() const
{ return lo_blob_datasize(blob); }
void *dataptr() const
{ return lo_blob_dataptr(blob); }
uint32_t size() const
{ return lo_blobsize(blob); }
operator lo_blob() const
{ return blob; };
protected:
lo_blob blob;
};
struct PathMsg
{
PathMsg() {}
PathMsg(const string_type _path, const Message& _msg)
: path(_path), msg(_msg) {}
std::string path;
Message msg;
};
class Bundle
{
public:
template <typename T>
struct ElementT
{
ElementT()
: type((lo_element_type)0), pm("", 0), bundle((lo_bundle)0) {}
ElementT(const string_type _path, const Message& _msg)
: type(LO_ELEMENT_MESSAGE),
pm(PathMsg(_path, _msg)),
bundle((lo_bundle)0) {}
ElementT(const T& _bundle)
: type(LO_ELEMENT_BUNDLE), pm("", 0), bundle(_bundle) {}
lo_element_type type;
PathMsg pm;
T bundle;
};
typedef ElementT<Bundle> Element;
Bundle() { bundle = lo_bundle_new(LO_TT_IMMEDIATE); lo_bundle_incref(bundle); }
Bundle(lo_timetag tt)
: bundle(lo_bundle_new(tt)) { lo_bundle_incref(bundle); }
Bundle(lo_bundle b)
: bundle(b) { if (b) { lo_bundle_incref(b); } }
Bundle(const string_type &path, lo_message m,
lo_timetag tt=LO_TT_IMMEDIATE)
: bundle(lo_bundle_new(tt))
{
lo_bundle_incref(bundle);
lo_bundle_add_message(bundle, path, m);
}
Bundle(const std::initializer_list<Element> &elements,
lo_timetag tt=LO_TT_IMMEDIATE)
: bundle(lo_bundle_new(tt))
{
lo_bundle_incref(bundle);
for (auto const &e : elements) {
if (e.type == LO_ELEMENT_MESSAGE) {
lo_bundle_add_message(bundle, e.pm.path.c_str(), e.pm.msg);
}
else if (e.type == LO_ELEMENT_BUNDLE) {
lo_bundle_add_bundle(bundle, e.bundle);
}
}
}
Bundle(const Bundle &b)
: Bundle((lo_bundle)b) {}
~Bundle()
{ if (bundle) lo_bundle_free_recursive(bundle); }
Bundle& operator=(Bundle b) { b.swap(*this); return *this; }
void swap(Bundle& b) throw () { std::swap(this->bundle, b.bundle); }
int add(const string_type &path, lo_message m)
{ return lo_bundle_add_message(bundle, path, m); }
int add(const lo_bundle b)
{ return lo_bundle_add_bundle(bundle, b); }
size_t length() const
{ return lo_bundle_length(bundle); }
unsigned int count() const
{ return lo_bundle_count(bundle); }
lo_message get_message(int index, const char **path=0) const
{ return lo_bundle_get_message(bundle, index, path); }
Message get_message(int index, std::string &path) const
{ const char *p;
lo_message m=lo_bundle_get_message(bundle, index, &p);
path = p?:0;
return Message(m); }
PathMsg get_message(int index) const
{ const char *p;
lo_message m = lo_bundle_get_message(bundle, index, &p);
return PathMsg(p?:0, m); }
Bundle get_bundle(int index) const
{ return lo_bundle_get_bundle(bundle, index); }
Element get_element(int index, const char **path=0) const
{
switch (lo_bundle_get_type(bundle, index)) {
case LO_ELEMENT_MESSAGE: {
const char *p;
lo_message m = lo_bundle_get_message(bundle, index, &p);
return Element(p, m);
}
case LO_ELEMENT_BUNDLE:
return Element(lo_bundle_get_bundle(bundle, index));
default:
return Element();
}
}
lo_timetag timestamp()
{ return lo_bundle_get_timestamp(bundle); }
void *serialise(void *to, size_t *size) const
{ return lo_bundle_serialise(bundle, to, size); }
void print() const
{ lo_bundle_pp(bundle); }
operator lo_bundle() const
{ return bundle; }
protected:
lo_bundle bundle;
};
std::string version() {
char str[32];
lo_version(str, 32, 0, 0, 0, 0, 0, 0, 0);
return std::string(str);
}
lo_timetag now() { lo_timetag tt; lo_timetag_now(&tt); return tt; }
lo_timetag immediate() { return LO_TT_IMMEDIATE; }
};
#endif // _LO_CPP_H_
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