Implemented TerminalAccess.isTerminal() and Terminal.getTerminalSize() on windows.

src/main/cpp/generic.cpp

@@ -0,0 +1,21 @@
+/*
+ * Generic functions
+ */
+#include "native.h"
+#include "generic.h"
+
+void mark_failed_with_message(JNIEnv *env, const char* message, jobject result) {
+    mark_failed_with_code(env, message, 0, result);
+}
+
+void mark_failed_with_code(JNIEnv *env, const char* message, int error_code, jobject result) {
+    jclass destClass = env->GetObjectClass(result);
+    jmethodID method = env->GetMethodID(destClass, "failed", "(Ljava/lang/String;I)V");
+    jstring message_str = env->NewStringUTF(message);
+    env->CallVoidMethod(result, method, message_str, error_code);
+}
+
+JNIEXPORT jint JNICALL
+Java_net_rubygrapefruit_platform_internal_NativeLibraryFunctions_getVersion(JNIEnv *env, jclass target) {
+    return 2;
+}