Add C++ interface

Change-Id: I05e104e4733d071949723073d32b21c22089ecdf
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

2 files changed, 615 insertions, 0 deletions

diff --git a/include/afb/afb-binding b/include/afb/afb-binding
new file mode 100644
index 00000000..19fa461c
--- /dev/null
+++ b/include/afb/afb-binding
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2016, 2017 "IoT.bzh"
+ * Author: José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+#include "afb-binding.hpp"
+
diff --git a/include/afb/afb-binding.hpp b/include/afb/afb-binding.hpp
new file mode 100644
index 00000000..1fc8b497
--- /dev/null
+++ b/include/afb/afb-binding.hpp
@@ -0,0 +1,596 @@
+/*
+ * Copyright (C) 2016, 2017 "IoT.bzh"
+ * Author: José Bollo <jose.bollo@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <cstdlib>
+#include <cstdarg>
+#include <functional>
+
+/* ensure version */
+#ifndef AFB_BINDING_VERSION
+# define AFB_BINDING_VERSION   2
+#endif
+
+/* check the version */
+#if AFB_BINDING_VERSION < 2
+# error "AFB_BINDING_VERSION must be at least 2"
+#endif
+
+/* get C definitions of bindings */
+extern "C" {
+#include "afb-binding.h"
+}
+
+namespace afb {
+/*************************************************************************/
+/* pre-declaration of classes                                            */
+/*************************************************************************/
+
+class arg;
+class event;
+class req;
+class stored_req;
+
+/*************************************************************************/
+/* declaration of functions                                              */
+/*************************************************************************/
+
+struct sd_event *get_event_loop();
+struct sd_bus *get_system_bus();
+struct sd_bus *get_user_bus();
+
+int broadcast_event(const char *name, json_object *object = nullptr);
+
+event make_event(const char *name);
+
+void verbose(int level, const char *file, int line, const char * func, const char *fmt, va_list args);
+
+void verbose(int level, const char *file, int line, const char * func, const char *fmt, ...);
+
+int rootdir_get_fd();
+
+int rootdir_open_locale_fd(const char *filename, int flags, const char *locale = nullptr);
+
+int queue_job(void (*callback)(int signum, void *arg), void *argument, void *group, int timeout);
+
+int require_api(const char *apiname, bool initialized = true);
+
+int rename_api(const char *apiname);
+
+int verbosity();
+
+bool wants_errors();
+bool wants_warnings();
+bool wants_notices();
+bool wants_infos();
+bool wants_debugs();
+
+void call(const char *api, const char *verb, struct json_object *args, void (*callback)(void*closure, int iserror, struct json_object *result), void *closure);
+
+template <class T> void call(const char *api, const char *verb, struct json_object *args, void (*callback)(T*closure, int iserror, struct json_object *result), T *closure);
+
+bool callsync(const char *api, const char *verb, struct json_object *args, struct json_object *&result);
+
+/*************************************************************************/
+/* effective declaration of classes                                      */
+/*************************************************************************/
+
+/* events */
+class event
+{
+	struct afb_event event_;
+public:
+	event() { event_.itf = nullptr; event_.closure = nullptr; }
+	event(const struct afb_event &e);
+	event(const event &other);
+	event &operator=(const event &other);
+
+	operator const struct afb_event&() const;
+
+	operator bool() const;
+	bool is_valid() const;
+
+	void invalidate();
+
+	int broadcast(json_object *object) const;
+	int push(json_object *object) const;
+
+	void drop();
+	const char *name() const;
+};
+
+/* args */
+class arg
+{
+	struct afb_arg arg_;
+public:
+	arg() = delete;
+	arg(const struct afb_arg &a);
+	arg(const arg &other);
+	arg &operator=(const arg &other);
+
+	operator const struct afb_arg&() const;
+
+	bool has_name() const;
+	bool has_value() const;
+	bool has_path() const;
+
+	const char *name() const;
+	const char *value() const;
+	const char *path() const;
+};
+
+/* req(uest) */
+class req
+{
+	struct afb_req req_;
+public:
+	class stored
+	{
+		struct afb_stored_req *sreq_;
+
+		friend class req;
+		stored() = delete;
+		stored(struct afb_stored_req *sr);
+	public:
+		stored(const stored &other);
+		stored &operator =(const stored &other);
+		req unstore() const;
+	};
+
+	class stored;
+
+public:
+	req() = delete;
+	req(const struct afb_req &r);
+	req(const req &other);
+	req &operator=(const req &other);
+
+	operator const struct afb_req&() const;
+
+	operator bool() const;
+	bool is_valid() const;
+
+	arg get(const char *name) const;
+
+	const char *value(const char *name) const;
+
+	const char *path(const char *name) const;
+
+	json_object *json() const;
+
+	void success(json_object *obj = nullptr, const char *info = nullptr) const;
+	void successf(json_object *obj, const char *info, ...) const;
+
+	void fail(const char *status = "failed", const char *info = nullptr) const;
+	void failf(const char *status, const char *info, ...) const;
+
+	void *context_get() const;
+
+	void context_set(void *context, void (*free_context)(void*)) const;
+
+	void *context(void *(*create_context)(), void (*free_context)(void*)) const;
+
+	template < class T > T *context() const;
+
+	void context_clear() const;
+
+	void addref() const;
+
+	void unref() const;
+
+	void session_close() const;
+
+	bool session_set_LOA(unsigned level) const;
+
+	stored store() const;
+
+	bool subscribe(const event &event) const;
+
+	bool unsubscribe(const event &event) const;
+
+	void subcall(const char *api, const char *verb, json_object *args, void (*callback)(void *closure, int iserror, json_object *result), void *closure) const;
+
+	void subcall(const char *api, const char *verb, json_object *args, void (*callback)(void *closure, int iserror, json_object *result, afb_req req), void *closure) const;
+
+	template <class T> void subcall(const char *api, const char *verb, json_object *args, void (*callback)(T *closure, int iserror, json_object *result), T *closure) const;
+
+	bool subcallsync(const char *api, const char *verb, json_object *args, struct json_object *&result) const;
+
+	void verbose(int level, const char *file, int line, const char * func, const char *fmt, va_list args) const;
+
+	void verbose(int level, const char *file, int line, const char * func, const char *fmt, ...) const;
+
+	bool has_permission(const char *permission) const;
+
+	char *get_application_id() const;
+};
+
+/*************************************************************************/
+/* effective declaration of classes                                      */
+/*************************************************************************/
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+/*************************************************************************/
+/* effective declaration of classes                                      */
+/*************************************************************************/
+
+/* events */
+inline event::event(const struct afb_event &e) : event_(e) { }
+inline event::event(const event &other) : event_(other.event_) { }
+inline event &event::operator=(const event &other) { event_ = other.event_; return *this; }
+
+inline event::operator const struct afb_event&() const { return event_; }
+
+inline event::operator bool() const { return is_valid(); }
+inline bool event::is_valid() const { return afb_event_is_valid(event_); } 
+
+inline void event::invalidate() { event_.itf = NULL; event_.closure = NULL; }
+
+inline int event::broadcast(json_object *object) const { return afb_event_broadcast(event_, object); } 
+inline int event::push(json_object *object) const { return afb_event_push(event_, object); }
+
+inline void event::drop() { afb_event_drop(event_); invalidate(); }
+inline const char *event::name() const { return afb_event_name(event_); }
+
+/* args */
+inline arg::arg(const struct afb_arg &a) : arg_(a) {}
+inline arg::arg(const arg &other) : arg_(other.arg_) {}
+inline arg &arg::operator=(const arg &other) { arg_ = other.arg_; return *this; }
+
+inline arg::operator const struct afb_arg&() const { return arg_; }
+
+inline bool arg::has_name() const { return !!arg_.name; }
+inline bool arg::has_value() const { return !!arg_.value; }
+inline bool arg::has_path() const { return !!arg_.path; }
+
+inline const char *arg::name() const { return arg_.name; }
+inline const char *arg::value() const { return arg_.value; }
+inline const char *arg::path() const { return arg_.path; }
+
+/* req(uests)s */
+
+inline req::stored::stored(struct afb_stored_req *sr) : sreq_(sr) {}
+
+inline req::stored::stored(const req::stored &other) : sreq_(other.sreq_) {}
+
+inline req::stored &req::stored::operator =(const req::stored &other) { sreq_ = other.sreq_; return *this; }
+
+inline req req::stored::unstore() const { return req(afb_daemon_unstore_req_v2(sreq_)); }
+
+
+inline req::req(const struct afb_req &r) : req_(r) {}
+inline req::req(const req &other) : req_(other.req_) {}
+inline req &req::operator=(const req &other) { req_ = other.req_; return *this; }
+
+inline req::operator const struct afb_req&() const { return req_; }
+
+inline req::operator bool() const { return !!afb_req_is_valid(req_); }
+inline bool req::is_valid() const { return !!afb_req_is_valid(req_); }
+
+inline arg req::get(const char *name) const { return arg(afb_req_get(req_, name)); }
+
+inline const char *req::value(const char *name) const { return afb_req_value(req_, name); }
+
+inline const char *req::path(const char *name) const { return afb_req_path(req_, name); }
+
+inline json_object *req::json() const { return afb_req_json(req_); }
+
+inline void req::success(json_object *obj, const char *info) const { afb_req_success(req_, obj, info); }
+inline void req::successf(json_object *obj, const char *info, ...) const
+{
+	va_list args;
+	va_start(args, info);
+	afb_req_success_v(req_, obj, info, args);
+	va_end(args);
+}
+
+inline void req::fail(const char *status, const char *info) const { afb_req_fail(req_, status, info); }
+inline void req::failf(const char *status, const char *info, ...) const
+{
+	va_list args;
+	va_start(args, info);
+	afb_req_fail_v(req_, status, info, args);
+	va_end(args);
+}
+
+inline void *req::context_get() const { return afb_req_context_get(req_); }
+
+inline void req::context_set(void *context, void (*free_context)(void*)) const { afb_req_context_set(req_, context, free_context); }
+
+inline void *req::context(void *(*create_context)(), void (*free_context)(void*)) const { return afb_req_context(req_, create_context, free_context); }
+
+template < class T >
+inline T *req::context() const
+{
+	T* (*creater)() = [](){return new T();};
+	void (*freer)(T*) = [](T*t){delete t;};
+	return reinterpret_cast<T*>(afb_req_context(req_,
+			reinterpret_cast<void *(*)()>(creater),
+			reinterpret_cast<void (*)(void*)>(freer)));
+}
+
+inline void req::context_clear() const { afb_req_context_clear(req_); }
+
+inline void req::addref() const { afb_req_addref(req_); }
+
+inline void req::unref() const { afb_req_unref(req_); }
+
+inline void req::session_close() const { afb_req_session_close(req_); }
+
+inline bool req::session_set_LOA(unsigned level) const { return !!afb_req_session_set_LOA(req_, level); }
+
+inline req::stored req::store() const { return stored(afb_req_store_v2(req_)); }
+
+inline bool req::subscribe(const event &event) const { return !afb_req_subscribe(req_, event); }
+
+inline bool req::unsubscribe(const event &event) const { return !afb_req_unsubscribe(req_, event); }
+
+inline void req::subcall(const char *api, const char *verb, json_object *args, void (*callback)(void *closure, int iserror, json_object *result), void *closure) const
+{
+	afb_req_subcall(req_, api, verb, args, callback, closure);
+}
+
+inline void req::subcall(const char *api, const char *verb, json_object *args, void (*callback)(void *closure, int iserror, json_object *result, struct afb_req req), void *closure) const
+{
+	afb_req_subcall_req(req_, api, verb, args, callback, closure);
+}
+
+template <class T>
+inline void req::subcall(const char *api, const char *verb, json_object *args, void (*callback)(T *closure, int iserror, json_object *result), T *closure) const
+{
+	afb_req_subcall(req_, api, verb, args, reinterpret_cast<void(*)(void*,int,json_object*)>(callback), reinterpret_cast<void*>(closure));
+}
+
+inline bool req::subcallsync(const char *api, const char *verb, json_object *args, struct json_object *&result) const
+{
+	return !!afb_req_subcall_sync(req_, api, verb, args, &result);
+}
+
+inline void req::verbose(int level, const char *file, int line, const char * func, const char *fmt, va_list args) const
+{
+	req_.itf->vverbose(req_.closure, level, file, line, func, fmt, args);
+}
+
+inline void req::verbose(int level, const char *file, int line, const char * func, const char *fmt, ...) const
+{
+	va_list args;
+	va_start(args, fmt);
+	req_.itf->vverbose(req_.closure, level, file, line, func, fmt, args);
+	va_end(args);
+}
+
+inline bool req::has_permission(const char *permission) const
+{
+	return bool(req_.itf->has_permission(req_.closure, permission));
+}
+
+inline char *req::get_application_id() const
+{
+	return req_.itf->get_application_id(req_.closure);
+}
+
+/* commons */
+inline struct sd_event *get_event_loop()
+	{ return afb_daemon_get_event_loop_v2(); }
+
+inline struct sd_bus *get_system_bus()
+	{ return afb_daemon_get_system_bus_v2(); }
+
+inline struct sd_bus *get_user_bus()
+	{ return afb_daemon_get_user_bus_v2(); }
+
+inline int broadcast_event(const char *name, json_object *object)
+	{ return afb_daemon_broadcast_event_v2(name, object); }
+
+inline event make_event(const char *name)
+	{ return afb_daemon_make_event_v2(name); }
+
+inline void verbose(int level, const char *file, int line, const char * func, const char *fmt, va_list args)
+	{ afb_daemon_verbose_v2(level, file, line, func, fmt, args); }
+
+inline void verbose(int level, const char *file, int line, const char * func, const char *fmt, ...)
+	{ va_list args; va_start(args, fmt); verbose(level, file, line, func, fmt, args); va_end(args); }
+
+inline int rootdir_get_fd()
+	{ return afb_daemon_rootdir_get_fd_v2(); }
+
+inline int rootdir_open_locale_fd(const char *filename, int flags, const char *locale)
+	{ return afb_daemon_rootdir_open_locale_v2(filename, flags, locale); }
+
+inline int queue_job(void (*callback)(int signum, void *arg), void *argument, void *group, int timeout)
+	{ return afb_daemon_queue_job_v2(callback, argument, group, timeout); }
+
+inline int require_api(const char *apiname, bool initialized)
+	{ return afb_daemon_require_api_v2(apiname, int(initialized)); }
+
+inline int rename_api(const char *apiname)
+	{ return afb_daemon_rename_api_v2(apiname); }
+
+inline int verbosity()
+	{ return afb_get_verbosity(); }
+
+inline bool wants_errors()
+	{ return afb_verbose_error(); }
+
+inline bool wants_warnings()
+	{ return afb_verbose_warning(); }
+
+inline bool wants_notices()
+	{ return afb_verbose_notice(); }
+
+inline bool wants_infos()
+	{ return afb_verbose_info(); }
+
+inline bool wants_debugs()
+	{ return afb_verbose_debug(); }
+
+inline void call(const char *api, const char *verb, struct json_object *args, void (*callback)(void*closure, int iserror, struct json_object *result), void *closure)
+{
+	afb_service_call(api, verb, args, callback, closure);
+}
+
+template <class T>
+inline void call(const char *api, const char *verb, struct json_object *args, void (*callback)(T*closure, int iserror, struct json_object *result), T *closure)
+{
+	afb_service_call(api, verb, args, reinterpret_cast<void(*)(void*,int,json_object*)>(callback), reinterpret_cast<void*>(closure));
+}
+
+inline bool callsync(const char *api, const char *verb, struct json_object *args, struct json_object *&result)
+{
+	return !!afb_service_call_sync(api, verb, args, &result);
+}
+
+/*************************************************************************/
+/* declaration of the binding's authorization s                          */
+/*************************************************************************/
+
+constexpr afb_auth auth_no()
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_No;
+	return r;
+}
+
+constexpr afb_auth auth_yes()
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_Yes;
+	return r;
+}
+
+constexpr afb_auth auth_token()
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_Token;
+	return r;
+}
+
+constexpr afb_auth auth_LOA(unsigned loa)
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_LOA;
+	r.loa = loa;
+	return r;
+}
+
+constexpr afb_auth auth_permission(const char *permission)
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_Permission;
+	r.text = permission;
+	return r;
+}
+
+constexpr afb_auth auth_not(const afb_auth *other)
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_Not;
+	r.first = other;
+	return r;
+}
+
+constexpr afb_auth auth_not(const afb_auth &other)
+{
+	return auth_not(&other);
+}
+
+constexpr afb_auth auth_or(const afb_auth *first, const afb_auth *next)
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_Or;
+	r.first = first;
+	r.next = next;
+	return r;
+}
+
+constexpr afb_auth auth_or(const afb_auth &first, const afb_auth &next)
+{
+	return auth_or(&first, &next);
+}
+
+constexpr afb_auth auth_and(const afb_auth *first, const afb_auth *next)
+{
+	afb_auth r = { afb_auth_No, 0, 0};
+	r.type = afb_auth_And;
+	r.first = first;
+	r.next = next;
+	return r;
+}
+
+constexpr afb_auth auth_and(const afb_auth &first, const afb_auth &next)
+{
+	return auth_and(&first, &next);
+}
+
+constexpr afb_verb_v2 verb(const char *name, void (*callback)(afb_req), const char *info = nullptr, unsigned session = 0, const afb_auth *auth = nullptr)
+{
+	afb_verb_v2 r = { 0, 0, 0, 0, 0 };
+	r.verb = name;
+	r.callback = callback;
+	r.info = info;
+	r.session = session;
+	r.auth = auth;
+	return r;
+}
+
+constexpr afb_verb_v2 verbend()
+{
+	afb_verb_v2 r = { 0, 0, 0, 0, 0 };
+	r.verb = nullptr;
+	r.callback = nullptr;
+	r.info = nullptr;
+	r.session = 0;
+	r.auth = nullptr;
+	return r;
+}
+
+const afb_binding_v2 binding(const char *name, const struct afb_verb_v2 *verbs, const char *info = nullptr, int (*init)() = nullptr, const char *specification = nullptr, void (*onevent)(const char*, struct json_object*) = nullptr, bool noconcurrency = false, int (*preinit)() = nullptr)
+{
+	afb_binding_v2 r = { 0, 0, 0, 0, 0, 0, 0, 0 };
+	r.api = name;
+	r.specification = specification;
+	r.info = info;
+	r.verbs = verbs;
+	r.preinit = preinit;
+	r.init = init;
+	r.onevent = onevent;
+	r.noconcurrency = noconcurrency ? 1 : 0;
+	return r;
+};
+
+/*************************************************************************/
+/***                         E N D                                     ***/
+/*************************************************************************/
+}