75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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//
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// Created by Grishka on 15.08.2018.
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//
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#ifndef LIBTGVOIP_JNIUTILITIES_H
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#define LIBTGVOIP_JNIUTILITIES_H
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#include "../../Buffers.h"
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#include <functional>
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#include <jni.h>
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#include <cstdarg>
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#include <string>
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extern JavaVM* sharedJVM;
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namespace tgvoip
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{
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namespace jni
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{
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inline void DoWithJNI(std::function<void(JNIEnv*)> f)
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{
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JNIEnv* env = NULL;
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bool didAttach = false;
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sharedJVM->GetEnv((void**)&env, JNI_VERSION_1_6);
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if (!env)
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{
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sharedJVM->AttachCurrentThread(&env, NULL);
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didAttach = true;
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}
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f(env);
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if (didAttach)
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{
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sharedJVM->DetachCurrentThread();
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}
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}
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inline void AttachAndCallVoidMethod(jmethodID method, jobject obj, ...)
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{
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if (!method || !obj)
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return;
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va_list va;
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va_start(va, obj);
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DoWithJNI([&va, method, obj](JNIEnv* env) {
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env->CallVoidMethodV(obj, method, va);
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});
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va_end(va);
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}
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inline std::string JavaStringToStdString(JNIEnv* env, jstring jstr)
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{
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if (!jstr)
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return "";
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const char* jchars = env->GetStringUTFChars(jstr, NULL);
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std::string str(jchars);
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env->ReleaseStringUTFChars(jstr, jchars);
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return str;
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}
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inline jbyteArray BufferToByteArray(JNIEnv* env, Buffer& buf)
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{
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jbyteArray arr = env->NewByteArray((jsize)buf.Length());
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jbyte* elements = env->GetByteArrayElements(arr, NULL);
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std::memcpy(elements, *buf, buf.Length());
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env->ReleaseByteArrayElements(arr, elements, 0);
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return arr;
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}
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}
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}
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#endif // LIBTGVOIP_JNIUTILITIES_H
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