/*
* Class: java_lang_VMClassRegistry
* Method: defineClass
* Signature: (Ljava/lang/String;[BII)Ljava/lang/Class;
*/
JNIEXPORT jclass JNICALL Java_java_lang_ClassLoader_defineClass0
(JNIEnv *jenv, jobject cl, jstring name, jbyteArray data, jint offset, jint len)
{
const char* clssname = NULL;
// obtain char * for the name if provided
if(name) {
clssname = GetStringUTFChars(jenv, name, NULL);
}
// obtain raw classfile data data pointer
jboolean is_copy;
jbyte *bytes = GetByteArrayElements(jenv, data, &is_copy);
assert(bytes);
// define class
jclass clss = DefineClass(jenv, clssname, cl, bytes + offset, len);
// release JNI objects
ReleaseByteArrayElements(jenv, data, bytes, 0);
if(clssname)
ReleaseStringUTFChars(jenv, name, clssname);
return clss;
}
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
std::string CreateSTDStringFromJByteArray(jbyteArray in_array, u32 in_length)
{
if (in_array == nullptr || in_length == 0)
{
return "";
}
auto environment = JavaVirtualMachine::Get()->GetJNIEnvironment();
jbyte* bytes = environment->GetByteArrayElements(in_array, JNI_FALSE);
CS_ASSERT(bytes != nullptr, "Bytes returned by GetByteArrayElements() cannot be null.");
std::string strOutput((const char*)bytes, in_length);
environment->ReleaseByteArrayElements(in_array, bytes, 0);
return strOutput;
}
static void callJNIReturnString(const char* str, char* result)
{
auto env = gApp->activity->env;
auto vm = gApp->activity->vm;
auto obj = gApp->activity->clazz;
vm->AttachCurrentThread( &env, NULL );
auto clazz = env->GetObjectClass(obj);
jmethodID methodID = env->GetMethodID(clazz, str, "()[B");
auto array = (jbyteArray)env->CallObjectMethod(obj, methodID);
auto ptr = env->GetByteArrayElements(array, 0);
int len = env->GetArrayLength(array);
memcpy(result, ptr, len);
result[len] = '\0';
env->ReleaseByteArrayElements(array, ptr, JNI_ABORT);
vm->DetachCurrentThread();
}
