#include "DiceRoller2.h"
#include <time.h>


/*
 * Class:     DiceRoller2
 * Method:    seedRand
 * Signature: ()V
 */
JNIEXPORT void JNICALL Java_DiceRoller2_seedRand
  (JNIEnv *env, jobject jobj)
{
 srand(time(NULL));
}

/*
 * Class:     DiceRoller2
 * Method:    getNext
 * Signature: ()I
 */
JNIEXPORT jint JNICALL Java_DiceRoller2_getNext
  (JNIEnv *env, jobject jobj)
{
 int i;

 i = rand()%6 + 1;

 return i;
}

/*
 * Class:     DiceRoller2
 * Method:    setNext
 * Signature: (Ljavax/swing/JButton;)V
 */
JNIEXPORT void JNICALL Java_DiceRoller2_setNext
  (JNIEnv *env, jobject jobj1, jobject jobj2)
{
 int i;

 i = rand()%6 + 1;
 
 /* set up return call to java class */
 /* in C++ */
 /* jclass cls = env->GetObjectClass (jobj1); */
 /* in C */
 jclass cls = (*env)->GetObjectClass (env, jobj1);
 jmethodID mid = (*env)->GetMethodID(env, cls, "setImage", 
			"(Ljavax/swing/JButton;I)V");
 if (mid == 0) {
        return;
    }

 printf("In C, rand() = %d, about to enter Java\n", i);
 (*env)->CallVoidMethod(env, jobj1, mid, jobj2, i);
 printf("In C, rand() = %d, back from Java\n", i);

 return;
}