Added td_jni.cpp for C++ bindings as cmake project

src/main/jni/CMakeLists.txt

@@ -1,5 +1,7 @@
 cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 project(JTDLib VERSION 1.0 LANGUAGES CXX)
+set(CMAKE_BUILD_TYPE Release)
+set(TD_ENABLE_JNI ON)
 
 if (NOT JNI_FOUND)
   find_package(JNI REQUIRED)
@@ -7,7 +9,7 @@ endif()
 
 add_subdirectory(td)
 
-add_library(tdjni SHARED
+add_library(tdjni STATIC
   td_jni.cpp
 )
 

src/main/jni/td_jni.cpp

@@ -0,0 +1,165 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+#include <td/telegram/Client.h>
+#include <td/telegram/Log.h>
+#include <td/telegram/td_api.h>
+
+#include <td/tl/tl_jni_object.h>
+
+#include <cstdint>
+#include <cstdlib>
+#include <string>
+#include <utility>
+
+namespace td_jni {
+
+static td::td_api::object_ptr<td::td_api::Function> fetch_function(JNIEnv *env, jobject function) {
+  td::jni::reset_parse_error();
+  auto result = td::td_api::Function::fetch(env, function);
+  if (td::jni::have_parse_error()) {
+    std::abort();
+  }
+  return result;
+}
+
+static td::Client *get_client(jlong client_id) {
+  return reinterpret_cast<td::Client *>(static_cast<std::uintptr_t>(client_id));
+}
+
+static jlong Client_createNativeClient(JNIEnv *env, jclass clazz) {
+  return static_cast<jlong>(reinterpret_cast<std::uintptr_t>(new td::Client()));
+}
+
+static void Client_nativeClientSend(JNIEnv *env, jclass clazz, jlong client_id, jlong id, jobject function) {
+  get_client(client_id)->send({static_cast<std::uint64_t>(id), fetch_function(env, function)});
+}
+
+static jint Client_nativeClientReceive(JNIEnv *env, jclass clazz, jlong client_id, jlongArray ids, jobjectArray events,
+                                       jdouble timeout) {
+  auto client = get_client(client_id);
+  jsize events_size = env->GetArrayLength(ids);  // ids and events size must be of equal size
+  if (events_size == 0) {
+    return 0;
+  }
+  jsize result_size = 0;
+
+  auto response = client->receive(timeout);
+  while (response.object) {
+    jlong result_id = static_cast<jlong>(response.id);
+    env->SetLongArrayRegion(ids, result_size, 1, &result_id);
+
+    jobject object;
+    response.object->store(env, object);
+    env->SetObjectArrayElement(events, result_size, object);
+    env->DeleteLocalRef(object);
+
+    result_size++;
+    if (result_size == events_size) {
+      break;
+    }
+
+    response = client->receive(0);
+  }
+  return result_size;
+}
+
+static jobject Client_nativeClientExecute(JNIEnv *env, jclass clazz, jobject function) {
+  jobject result;
+  td::Client::execute({0, fetch_function(env, function)}).object->store(env, result);
+  return result;
+}
+
+static void Client_destroyNativeClient(JNIEnv *env, jclass clazz, jlong client_id) {
+  delete get_client(client_id);
+}
+
+static void Log_setVerbosityLevel(JNIEnv *env, jclass clazz, jint new_log_verbosity_level) {
+  td::Log::set_verbosity_level(static_cast<int>(new_log_verbosity_level));
+}
+
+static jboolean Log_setFilePath(JNIEnv *env, jclass clazz, jstring file_path) {
+  return td::Log::set_file_path(td::jni::from_jstring(env, file_path)) ? JNI_TRUE : JNI_FALSE;
+}
+
+static void Log_setMaxFileSize(JNIEnv *env, jclass clazz, jlong max_file_size) {
+  td::Log::set_max_file_size(max_file_size);
+}
+
+static jstring Object_toString(JNIEnv *env, jobject object) {
+  return td::jni::to_jstring(env, to_string(td::td_api::Object::fetch(env, object)));
+}
+
+static jstring Function_toString(JNIEnv *env, jobject object) {
+  return td::jni::to_jstring(env, to_string(td::td_api::Function::fetch(env, object)));
+}
+
+static constexpr jint JAVA_VERSION = JNI_VERSION_1_6;
+static JavaVM *java_vm;
+static jclass log_class;
+
+static void on_fatal_error(const char *error_message) {
+  auto env = td::jni::get_jni_env(java_vm, JAVA_VERSION);
+  jmethodID on_fatal_error_method = env->GetStaticMethodID(log_class, "onFatalError", "(Ljava/lang/String;)V");
+  if (env && on_fatal_error_method) {
+    jstring error_str = td::jni::to_jstring(env.get(), error_message);
+    env->CallStaticVoidMethod(log_class, on_fatal_error_method, error_str);
+    if (error_str) {
+      env->DeleteLocalRef(error_str);
+    }
+  }
+}
+
+static jint register_native(JavaVM *vm) {
+  JNIEnv *env;
+  if (vm->GetEnv(reinterpret_cast<void **>(&env), JAVA_VERSION) != JNI_OK) {
+    return -1;
+  }
+
+  java_vm = vm;
+
+  auto register_method = [env](jclass clazz, std::string name, std::string signature, auto function_ptr) {
+    td::jni::register_native_method(env, clazz, std::move(name), std::move(signature),
+                                    reinterpret_cast<void *>(function_ptr));
+  };
+
+  auto client_class = td::jni::get_jclass(env, PACKAGE_NAME "/Client");
+  log_class = td::jni::get_jclass(env, PACKAGE_NAME "/Log");
+  auto object_class = td::jni::get_jclass(env, PACKAGE_NAME "/TdApi$Object");
+  auto function_class = td::jni::get_jclass(env, PACKAGE_NAME "/TdApi$Function");
+
+#define TD_OBJECT "L" PACKAGE_NAME "/TdApi$Object;"
+#define TD_FUNCTION "L" PACKAGE_NAME "/TdApi$Function;"
+  register_method(client_class, "createNativeClient", "()J", Client_createNativeClient);
+  register_method(client_class, "nativeClientSend", "(JJ" TD_FUNCTION ")V", Client_nativeClientSend);
+  register_method(client_class, "nativeClientReceive", "(J[J[" TD_OBJECT "D)I", Client_nativeClientReceive);
+  register_method(client_class, "nativeClientExecute", "(" TD_FUNCTION ")" TD_OBJECT, Client_nativeClientExecute);
+  register_method(client_class, "destroyNativeClient", "(J)V", Client_destroyNativeClient);
+
+  register_method(log_class, "setVerbosityLevel", "(I)V", Log_setVerbosityLevel);
+  register_method(log_class, "setFilePath", "(Ljava/lang/String;)Z", Log_setFilePath);
+  register_method(log_class, "setMaxFileSize", "(J)V", Log_setMaxFileSize);
+
+  register_method(object_class, "toString", "()Ljava/lang/String;", Object_toString);
+
+  register_method(function_class, "toString", "()Ljava/lang/String;", Function_toString);
+#undef TD_FUNCTION
+#undef TD_OBJECT
+
+  td::jni::init_vars(env, PACKAGE_NAME);
+  td::td_api::Object::init_jni_vars(env, PACKAGE_NAME);
+  td::td_api::Function::init_jni_vars(env, PACKAGE_NAME);
+  td::Log::set_fatal_error_callback(on_fatal_error);
+
+  return JAVA_VERSION;
+}
+
+}  // namespace td_jni
+
+JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved) {
+  static jint jni_version = td_jni::register_native(vm);  // call_once
+  return jni_version;
+}