/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * JNI specification, as defined by Sun:
 * http://java.sun.com/javase/6/docs/technotes/guides/jni/spec/jniTOC.html
 *
 * Everything here is expected to be VM-neutral.
 */

#ifndef JNI_H_
#define JNI_H_

#include <stdarg.h>
#include <stdint.h>

/* Primitive types that match up with Java equivalents. */
typedef uint8_t jboolean; /* unsigned 8 bits */
typedef int8_t jbyte; /* signed 8 bits */
typedef uint16_t jchar; /* unsigned 16 bits */
typedef int16_t jshort; /* signed 16 bits */
typedef int32_t jint; /* signed 32 bits */
typedef int64_t jlong; /* signed 64 bits */
typedef float jfloat; /* 32-bit IEEE 754 */
typedef double jdouble; /* 64-bit IEEE 754 */

/* "cardinal indices and sizes" */
typedef jint jsize;

#ifdef __cplusplus
/*
 * Reference types, in C++
 */
class _jobject {};
class _jclass : public _jobject {};
class _jstring : public _jobject {};
class _jarray : public _jobject {};
class _jobjectArray : public _jarray {};
class _jbooleanArray : public _jarray {};
class _jbyteArray : public _jarray {};
class _jcharArray : public _jarray {};
class _jshortArray : public _jarray {};
class _jintArray : public _jarray {};
class _jlongArray : public _jarray {};
class _jfloatArray : public _jarray {};
class _jdoubleArray : public _jarray {};
class _jthrowable : public _jobject {};

typedef _jobject *jobject;
typedef _jclass *jclass;
typedef _jstring *jstring;
typedef _jarray *jarray;
typedef _jobjectArray *jobjectArray;
typedef _jbooleanArray *jbooleanArray;
typedef _jbyteArray *jbyteArray;
typedef _jcharArray *jcharArray;
typedef _jshortArray *jshortArray;
typedef _jintArray *jintArray;
typedef _jlongArray *jlongArray;
typedef _jfloatArray *jfloatArray;
typedef _jdoubleArray *jdoubleArray;
typedef _jthrowable *jthrowable;
typedef _jobject *jweak;

#else /* not __cplusplus */

/*
 * Reference types, in C.
 */
typedef void *jobject;
typedef jobject jclass;
typedef jobject jstring;
typedef jobject jarray;
typedef jarray jobjectArray;
typedef jarray jbooleanArray;
typedef jarray jbyteArray;
typedef jarray jcharArray;
typedef jarray jshortArray;
typedef jarray jintArray;
typedef jarray jlongArray;
typedef jarray jfloatArray;
typedef jarray jdoubleArray;
typedef jobject jthrowable;
typedef jobject jweak;

#endif /* not __cplusplus */

struct _jfieldID; /* opaque structure */
typedef struct _jfieldID *jfieldID; /* field IDs */

struct _jmethodID; /* opaque structure */
typedef struct _jmethodID *jmethodID; /* method IDs */

struct JNIInvokeInterface;

typedef union jvalue {
  jboolean z;
  jbyte b;
  jchar c;
  jshort s;
  jint i;
  jlong j;
  jfloat f;
  jdouble d;
  jobject l;
} jvalue;

typedef enum jobjectRefType {
  JNIInvalidRefType = 0,
  JNILocalRefType = 1,
  JNIGlobalRefType = 2,
  JNIWeakGlobalRefType = 3
} jobjectRefType;

typedef struct {
  const char *name;
  const char *signature;
  void *fnPtr;
} JNINativeMethod;

struct _JNIEnv;
struct _JavaVM;
typedef const struct JNINativeInterface *C_JNIEnv;

#if defined(__cplusplus)
typedef _JNIEnv JNIEnv;
typedef _JavaVM JavaVM;
#else
typedef const struct JNINativeInterface *JNIEnv;
typedef const struct JNIInvokeInterface *JavaVM;
#endif

/*
 * Table of interface function pointers.
 */
struct JNINativeInterface {
  void *reserved0;
  void *reserved1;
  void *reserved2;
  void *reserved3;

  jint (*GetVersion)(JNIEnv *);

  jclass (*DefineClass)(JNIEnv *, const char *, jobject, const jbyte *, jsize);
  jclass (*FindClass)(JNIEnv *, const char *);

  jmethodID (*FromReflectedMethod)(JNIEnv *, jobject);
  jfieldID (*FromReflectedField)(JNIEnv *, jobject);
  /* spec doesn't show jboolean parameter */
  jobject (*ToReflectedMethod)(JNIEnv *, jclass, jmethodID, jboolean);

  jclass (*GetSuperclass)(JNIEnv *, jclass);
  jboolean (*IsAssignableFrom)(JNIEnv *, jclass, jclass);

  /* spec doesn't show jboolean parameter */
  jobject (*ToReflectedField)(JNIEnv *, jclass, jfieldID, jboolean);

  jint (*Throw)(JNIEnv *, jthrowable);
  jint (*ThrowNew)(JNIEnv *, jclass, const char *);
  jthrowable (*ExceptionOccurred)(JNIEnv *);
  void (*ExceptionDescribe)(JNIEnv *);
  void (*ExceptionClear)(JNIEnv *);
  void (*FatalError)(JNIEnv *, const char *);

  jint (*PushLocalFrame)(JNIEnv *, jint);
  jobject (*PopLocalFrame)(JNIEnv *, jobject);

  jobject (*NewGlobalRef)(JNIEnv *, jobject);
  void (*DeleteGlobalRef)(JNIEnv *, jobject);
  void (*DeleteLocalRef)(JNIEnv *, jobject);
  jboolean (*IsSameObject)(JNIEnv *, jobject, jobject);

  jobject (*NewLocalRef)(JNIEnv *, jobject);
  jint (*EnsureLocalCapacity)(JNIEnv *, jint);

  jobject (*AllocObject)(JNIEnv *, jclass);
  jobject (*NewObject)(JNIEnv *, jclass, jmethodID, ...);
  jobject (*NewObjectV)(JNIEnv *, jclass, jmethodID, va_list);
  jobject (*NewObjectA)(JNIEnv *, jclass, jmethodID, jvalue *);

  jclass (*GetObjectClass)(JNIEnv *, jobject);
  jboolean (*IsInstanceOf)(JNIEnv *, jobject, jclass);
  jmethodID (*GetMethodID)(JNIEnv *, jclass, const char *, const char *);

  jobject (*CallObjectMethod)(JNIEnv *, jobject, jmethodID, ...);
  jobject (*CallObjectMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jobject (*CallObjectMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jboolean (*CallBooleanMethod)(JNIEnv *, jobject, jmethodID, ...);
  jboolean (*CallBooleanMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jboolean (*CallBooleanMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jbyte (*CallByteMethod)(JNIEnv *, jobject, jmethodID, ...);
  jbyte (*CallByteMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jbyte (*CallByteMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jchar (*CallCharMethod)(JNIEnv *, jobject, jmethodID, ...);
  jchar (*CallCharMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jchar (*CallCharMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jshort (*CallShortMethod)(JNIEnv *, jobject, jmethodID, ...);
  jshort (*CallShortMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jshort (*CallShortMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jint (*CallIntMethod)(JNIEnv *, jobject, jmethodID, ...);
  jint (*CallIntMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jint (*CallIntMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jlong (*CallLongMethod)(JNIEnv *, jobject, jmethodID, ...);
  jlong (*CallLongMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jlong (*CallLongMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jfloat (*CallFloatMethod)(JNIEnv *, jobject, jmethodID, ...);
  jfloat (*CallFloatMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jfloat (*CallFloatMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  jdouble (*CallDoubleMethod)(JNIEnv *, jobject, jmethodID, ...);
  jdouble (*CallDoubleMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  jdouble (*CallDoubleMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);
  void (*CallVoidMethod)(JNIEnv *, jobject, jmethodID, ...);
  void (*CallVoidMethodV)(JNIEnv *, jobject, jmethodID, va_list);
  void (*CallVoidMethodA)(JNIEnv *, jobject, jmethodID, jvalue *);

  jobject (*CallNonvirtualObjectMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jobject (*CallNonvirtualObjectMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jobject (*CallNonvirtualObjectMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jboolean (*CallNonvirtualBooleanMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jboolean (*CallNonvirtualBooleanMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jboolean (*CallNonvirtualBooleanMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jbyte (*CallNonvirtualByteMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jbyte (*CallNonvirtualByteMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jbyte (*CallNonvirtualByteMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jchar (*CallNonvirtualCharMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jchar (*CallNonvirtualCharMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jchar (*CallNonvirtualCharMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jshort (*CallNonvirtualShortMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jshort (*CallNonvirtualShortMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jshort (*CallNonvirtualShortMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jint (*CallNonvirtualIntMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jint (*CallNonvirtualIntMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jint (*CallNonvirtualIntMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jlong (*CallNonvirtualLongMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jlong (*CallNonvirtualLongMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jlong (*CallNonvirtualLongMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jfloat (*CallNonvirtualFloatMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jfloat (*CallNonvirtualFloatMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jfloat (*CallNonvirtualFloatMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  jdouble (*CallNonvirtualDoubleMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  jdouble (*CallNonvirtualDoubleMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  jdouble (*CallNonvirtualDoubleMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);
  void (*CallNonvirtualVoidMethod)(JNIEnv *, jobject, jclass, jmethodID, ...);
  void (*CallNonvirtualVoidMethodV)(JNIEnv *, jobject, jclass, jmethodID, va_list);
  void (*CallNonvirtualVoidMethodA)(JNIEnv *, jobject, jclass, jmethodID, jvalue *);

  jfieldID (*GetFieldID)(JNIEnv *, jclass, const char *, const char *);

  jobject (*GetObjectField)(JNIEnv *, jobject, jfieldID);
  jboolean (*GetBooleanField)(JNIEnv *, jobject, jfieldID);
  jbyte (*GetByteField)(JNIEnv *, jobject, jfieldID);
  jchar (*GetCharField)(JNIEnv *, jobject, jfieldID);
  jshort (*GetShortField)(JNIEnv *, jobject, jfieldID);
  jint (*GetIntField)(JNIEnv *, jobject, jfieldID);
  jlong (*GetLongField)(JNIEnv *, jobject, jfieldID);
  jfloat (*GetFloatField)(JNIEnv *, jobject, jfieldID);
  jdouble (*GetDoubleField)(JNIEnv *, jobject, jfieldID);

  void (*SetObjectField)(JNIEnv *, jobject, jfieldID, jobject);
  void (*SetBooleanField)(JNIEnv *, jobject, jfieldID, jboolean);
  void (*SetByteField)(JNIEnv *, jobject, jfieldID, jbyte);
  void (*SetCharField)(JNIEnv *, jobject, jfieldID, jchar);
  void (*SetShortField)(JNIEnv *, jobject, jfieldID, jshort);
  void (*SetIntField)(JNIEnv *, jobject, jfieldID, jint);
  void (*SetLongField)(JNIEnv *, jobject, jfieldID, jlong);
  void (*SetFloatField)(JNIEnv *, jobject, jfieldID, jfloat);
  void (*SetDoubleField)(JNIEnv *, jobject, jfieldID, jdouble);

  jmethodID (*GetStaticMethodID)(JNIEnv *, jclass, const char *, const char *);

  jobject (*CallStaticObjectMethod)(JNIEnv *, jclass, jmethodID, ...);
  jobject (*CallStaticObjectMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jobject (*CallStaticObjectMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jboolean (*CallStaticBooleanMethod)(JNIEnv *, jclass, jmethodID, ...);
  jboolean (*CallStaticBooleanMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jboolean (*CallStaticBooleanMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jbyte (*CallStaticByteMethod)(JNIEnv *, jclass, jmethodID, ...);
  jbyte (*CallStaticByteMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jbyte (*CallStaticByteMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jchar (*CallStaticCharMethod)(JNIEnv *, jclass, jmethodID, ...);
  jchar (*CallStaticCharMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jchar (*CallStaticCharMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jshort (*CallStaticShortMethod)(JNIEnv *, jclass, jmethodID, ...);
  jshort (*CallStaticShortMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jshort (*CallStaticShortMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jint (*CallStaticIntMethod)(JNIEnv *, jclass, jmethodID, ...);
  jint (*CallStaticIntMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jint (*CallStaticIntMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jlong (*CallStaticLongMethod)(JNIEnv *, jclass, jmethodID, ...);
  jlong (*CallStaticLongMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jlong (*CallStaticLongMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jfloat (*CallStaticFloatMethod)(JNIEnv *, jclass, jmethodID, ...);
  jfloat (*CallStaticFloatMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jfloat (*CallStaticFloatMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  jdouble (*CallStaticDoubleMethod)(JNIEnv *, jclass, jmethodID, ...);
  jdouble (*CallStaticDoubleMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  jdouble (*CallStaticDoubleMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);
  void (*CallStaticVoidMethod)(JNIEnv *, jclass, jmethodID, ...);
  void (*CallStaticVoidMethodV)(JNIEnv *, jclass, jmethodID, va_list);
  void (*CallStaticVoidMethodA)(JNIEnv *, jclass, jmethodID, jvalue *);

  jfieldID (*GetStaticFieldID)(JNIEnv *, jclass, const char *, const char *);

  jobject (*GetStaticObjectField)(JNIEnv *, jclass, jfieldID);
  jboolean (*GetStaticBooleanField)(JNIEnv *, jclass, jfieldID);
  jbyte (*GetStaticByteField)(JNIEnv *, jclass, jfieldID);
  jchar (*GetStaticCharField)(JNIEnv *, jclass, jfieldID);
  jshort (*GetStaticShortField)(JNIEnv *, jclass, jfieldID);
  jint (*GetStaticIntField)(JNIEnv *, jclass, jfieldID);
  jlong (*GetStaticLongField)(JNIEnv *, jclass, jfieldID);
  jfloat (*GetStaticFloatField)(JNIEnv *, jclass, jfieldID);
  jdouble (*GetStaticDoubleField)(JNIEnv *, jclass, jfieldID);

  void (*SetStaticObjectField)(JNIEnv *, jclass, jfieldID, jobject);
  void (*SetStaticBooleanField)(JNIEnv *, jclass, jfieldID, jboolean);
  void (*SetStaticByteField)(JNIEnv *, jclass, jfieldID, jbyte);
  void (*SetStaticCharField)(JNIEnv *, jclass, jfieldID, jchar);
  void (*SetStaticShortField)(JNIEnv *, jclass, jfieldID, jshort);
  void (*SetStaticIntField)(JNIEnv *, jclass, jfieldID, jint);
  void (*SetStaticLongField)(JNIEnv *, jclass, jfieldID, jlong);
  void (*SetStaticFloatField)(JNIEnv *, jclass, jfieldID, jfloat);
  void (*SetStaticDoubleField)(JNIEnv *, jclass, jfieldID, jdouble);

  jstring (*NewString)(JNIEnv *, const jchar *, jsize);
  jsize (*GetStringLength)(JNIEnv *, jstring);
  const jchar *(*GetStringChars)(JNIEnv *, jstring, jboolean *);
  void (*ReleaseStringChars)(JNIEnv *, jstring, const jchar *);
  jstring (*NewStringUTF)(JNIEnv *, const char *);
  jsize (*GetStringUTFLength)(JNIEnv *, jstring);
  /* JNI spec says this returns const jbyte*, but that's inconsistent */
  const char *(*GetStringUTFChars)(JNIEnv *, jstring, jboolean *);
  void (*ReleaseStringUTFChars)(JNIEnv *, jstring, const char *);
  jsize (*GetArrayLength)(JNIEnv *, jarray);
  jobjectArray (*NewObjectArray)(JNIEnv *, jsize, jclass, jobject);
  jobject (*GetObjectArrayElement)(JNIEnv *, jobjectArray, jsize);
  void (*SetObjectArrayElement)(JNIEnv *, jobjectArray, jsize, jobject);

  jbooleanArray (*NewBooleanArray)(JNIEnv *, jsize);
  jbyteArray (*NewByteArray)(JNIEnv *, jsize);
  jcharArray (*NewCharArray)(JNIEnv *, jsize);
  jshortArray (*NewShortArray)(JNIEnv *, jsize);
  jintArray (*NewIntArray)(JNIEnv *, jsize);
  jlongArray (*NewLongArray)(JNIEnv *, jsize);
  jfloatArray (*NewFloatArray)(JNIEnv *, jsize);
  jdoubleArray (*NewDoubleArray)(JNIEnv *, jsize);

  jboolean *(*GetBooleanArrayElements)(JNIEnv *, jbooleanArray, jboolean *);
  jbyte *(*GetByteArrayElements)(JNIEnv *, jbyteArray, jboolean *);
  jchar *(*GetCharArrayElements)(JNIEnv *, jcharArray, jboolean *);
  jshort *(*GetShortArrayElements)(JNIEnv *, jshortArray, jboolean *);
  jint *(*GetIntArrayElements)(JNIEnv *, jintArray, jboolean *);
  jlong *(*GetLongArrayElements)(JNIEnv *, jlongArray, jboolean *);
  jfloat *(*GetFloatArrayElements)(JNIEnv *, jfloatArray, jboolean *);
  jdouble *(*GetDoubleArrayElements)(JNIEnv *, jdoubleArray, jboolean *);

  void (*ReleaseBooleanArrayElements)(JNIEnv *, jbooleanArray, jboolean *, jint);
  void (*ReleaseByteArrayElements)(JNIEnv *, jbyteArray, jbyte *, jint);
  void (*ReleaseCharArrayElements)(JNIEnv *, jcharArray, jchar *, jint);
  void (*ReleaseShortArrayElements)(JNIEnv *, jshortArray, jshort *, jint);
  void (*ReleaseIntArrayElements)(JNIEnv *, jintArray, jint *, jint);
  void (*ReleaseLongArrayElements)(JNIEnv *, jlongArray, jlong *, jint);
  void (*ReleaseFloatArrayElements)(JNIEnv *, jfloatArray, jfloat *, jint);
  void (*ReleaseDoubleArrayElements)(JNIEnv *, jdoubleArray, jdouble *, jint);

  void (*GetBooleanArrayRegion)(JNIEnv *, jbooleanArray, jsize, jsize, jboolean *);
  void (*GetByteArrayRegion)(JNIEnv *, jbyteArray, jsize, jsize, jbyte *);
  void (*GetCharArrayRegion)(JNIEnv *, jcharArray, jsize, jsize, jchar *);
  void (*GetShortArrayRegion)(JNIEnv *, jshortArray, jsize, jsize, jshort *);
  void (*GetIntArrayRegion)(JNIEnv *, jintArray, jsize, jsize, jint *);
  void (*GetLongArrayRegion)(JNIEnv *, jlongArray, jsize, jsize, jlong *);
  void (*GetFloatArrayRegion)(JNIEnv *, jfloatArray, jsize, jsize, jfloat *);
  void (*GetDoubleArrayRegion)(JNIEnv *, jdoubleArray, jsize, jsize, jdouble *);

  /* spec shows these without const; some jni.h do, some don't */
  void (*SetBooleanArrayRegion)(JNIEnv *, jbooleanArray, jsize, jsize, const jboolean *);
  void (*SetByteArrayRegion)(JNIEnv *, jbyteArray, jsize, jsize, const jbyte *);
  void (*SetCharArrayRegion)(JNIEnv *, jcharArray, jsize, jsize, const jchar *);
  void (*SetShortArrayRegion)(JNIEnv *, jshortArray, jsize, jsize, const jshort *);
  void (*SetIntArrayRegion)(JNIEnv *, jintArray, jsize, jsize, const jint *);
  void (*SetLongArrayRegion)(JNIEnv *, jlongArray, jsize, jsize, const jlong *);
  void (*SetFloatArrayRegion)(JNIEnv *, jfloatArray, jsize, jsize, const jfloat *);
  void (*SetDoubleArrayRegion)(JNIEnv *, jdoubleArray, jsize, jsize, const jdouble *);

  jint (*RegisterNatives)(JNIEnv *, jclass, const JNINativeMethod *, jint);
  jint (*UnregisterNatives)(JNIEnv *, jclass);
  jint (*MonitorEnter)(JNIEnv *, jobject);
  jint (*MonitorExit)(JNIEnv *, jobject);
  jint (*GetJavaVM)(JNIEnv *, JavaVM **);

  void (*GetStringRegion)(JNIEnv *, jstring, jsize, jsize, jchar *);
  void (*GetStringUTFRegion)(JNIEnv *, jstring, jsize, jsize, char *);

  void *(*GetPrimitiveArrayCritical)(JNIEnv *, jarray, jboolean *);
  void (*ReleasePrimitiveArrayCritical)(JNIEnv *, jarray, void *, jint);

  const jchar *(*GetStringCritical)(JNIEnv *, jstring, jboolean *);
  void (*ReleaseStringCritical)(JNIEnv *, jstring, const jchar *);

  jweak (*NewWeakGlobalRef)(JNIEnv *, jobject);
  void (*DeleteWeakGlobalRef)(JNIEnv *, jweak);

  jboolean (*ExceptionCheck)(JNIEnv *);

  jobject (*NewDirectByteBuffer)(JNIEnv *, void *, jlong);
  void *(*GetDirectBufferAddress)(JNIEnv *, jobject);
  jlong (*GetDirectBufferCapacity)(JNIEnv *, jobject);

  /* added in JNI 1.6 */
  jobjectRefType (*GetObjectRefType)(JNIEnv *, jobject);
};

/*
 * C++ object wrapper.
 *
 * This is usually overlaid on a C struct whose first element is a
 * JNINativeInterface*.  We rely somewhat on compiler behavior.
 */
struct _JNIEnv {
  /* do not rename this; it does not seem to be entirely opaque */
  const struct JNINativeInterface *functions;

#if defined(__cplusplus)

  jint GetVersion()
  {
    return functions->GetVersion(this);
  }

  jclass DefineClass(const char *name, jobject loader, const jbyte *buf, jsize bufLen)
  {
    return functions->DefineClass(this, name, loader, buf, bufLen);
  }

  jclass FindClass(const char *name)
  {
    return functions->FindClass(this, name);
  }

  jmethodID FromReflectedMethod(jobject method)
  {
    return functions->FromReflectedMethod(this, method);
  }

  jfieldID FromReflectedField(jobject field)
  {
    return functions->FromReflectedField(this, field);
  }

  jobject ToReflectedMethod(jclass cls, jmethodID methodID, jboolean isStatic)
  {
    return functions->ToReflectedMethod(this, cls, methodID, isStatic);
  }

  jclass GetSuperclass(jclass clazz)
  {
    return functions->GetSuperclass(this, clazz);
  }

  jboolean IsAssignableFrom(jclass clazz1, jclass clazz2)
  {
    return functions->IsAssignableFrom(this, clazz1, clazz2);
  }

  jobject ToReflectedField(jclass cls, jfieldID fieldID, jboolean isStatic)
  {
    return functions->ToReflectedField(this, cls, fieldID, isStatic);
  }

  jint Throw(jthrowable obj)
  {
    return functions->Throw(this, obj);
  }

  jint ThrowNew(jclass clazz, const char *message)
  {
    return functions->ThrowNew(this, clazz, message);
  }

  jthrowable ExceptionOccurred()
  {
    return functions->ExceptionOccurred(this);
  }

  void ExceptionDescribe()
  {
    functions->ExceptionDescribe(this);
  }

  void ExceptionClear()
  {
    functions->ExceptionClear(this);
  }

  void FatalError(const char *msg)
  {
    functions->FatalError(this, msg);
  }

  jint PushLocalFrame(jint capacity)
  {
    return functions->PushLocalFrame(this, capacity);
  }

  jobject PopLocalFrame(jobject result)
  {
    return functions->PopLocalFrame(this, result);
  }

  jobject NewGlobalRef(jobject obj)
  {
    return functions->NewGlobalRef(this, obj);
  }

  void DeleteGlobalRef(jobject globalRef)
  {
    functions->DeleteGlobalRef(this, globalRef);
  }

  void DeleteLocalRef(jobject localRef)
  {
    functions->DeleteLocalRef(this, localRef);
  }

  jboolean IsSameObject(jobject ref1, jobject ref2)
  {
    return functions->IsSameObject(this, ref1, ref2);
  }

  jobject NewLocalRef(jobject ref)
  {
    return functions->NewLocalRef(this, ref);
  }

  jint EnsureLocalCapacity(jint capacity)
  {
    return functions->EnsureLocalCapacity(this, capacity);
  }

  jobject AllocObject(jclass clazz)
  {
    return functions->AllocObject(this, clazz);
  }

  jobject NewObject(jclass clazz, jmethodID methodID, ...)
  {
    va_list args;
    va_start(args, methodID);
    jobject result = functions->NewObjectV(this, clazz, methodID, args);
    va_end(args);
    return result;
  }

  jobject NewObjectV(jclass clazz, jmethodID methodID, va_list args)
  {
    return functions->NewObjectV(this, clazz, methodID, args);
  }

  jobject NewObjectA(jclass clazz, jmethodID methodID, jvalue *args)
  {
    return functions->NewObjectA(this, clazz, methodID, args);
  }

  jclass GetObjectClass(jobject obj)
  {
    return functions->GetObjectClass(this, obj);
  }

  jboolean IsInstanceOf(jobject obj, jclass clazz)
  {
    return functions->IsInstanceOf(this, obj, clazz);
  }

  jmethodID GetMethodID(jclass clazz, const char *name, const char *sig)
  {
    return functions->GetMethodID(this, clazz, name, sig);
  }

#define CALL_TYPE_METHOD(_jtype, _jname)                                  \
  _jtype Call##_jname##Method(jobject obj, jmethodID methodID, ...)       \
  {                                                                       \
    _jtype result;                                                        \
    va_list args;                                                         \
    va_start(args, methodID);                                             \
    result = functions->Call##_jname##MethodV(this, obj, methodID, args); \
    va_end(args);                                                         \
    return result;                                                        \
  }
#define CALL_TYPE_METHODV(_jtype, _jname)                                     \
  _jtype Call##_jname##MethodV(jobject obj, jmethodID methodID, va_list args) \
  {                                                                           \
    return functions->Call##_jname##MethodV(this, obj, methodID, args);       \
  }
#define CALL_TYPE_METHODA(_jtype, _jname)                                     \
  _jtype Call##_jname##MethodA(jobject obj, jmethodID methodID, jvalue *args) \
  {                                                                           \
    return functions->Call##_jname##MethodA(this, obj, methodID, args);       \
  }

#define CALL_TYPE(_jtype, _jname)   \
  CALL_TYPE_METHOD(_jtype, _jname)  \
  CALL_TYPE_METHODV(_jtype, _jname) \
  CALL_TYPE_METHODA(_jtype, _jname)

  CALL_TYPE(jobject, Object)
  CALL_TYPE(jboolean, Boolean)
  CALL_TYPE(jbyte, Byte)
  CALL_TYPE(jchar, Char)
  CALL_TYPE(jshort, Short)
  CALL_TYPE(jint, Int)
  CALL_TYPE(jlong, Long)
  CALL_TYPE(jfloat, Float)
  CALL_TYPE(jdouble, Double)

  void CallVoidMethod(jobject obj, jmethodID methodID, ...)
  {
    va_list args;
    va_start(args, methodID);
    functions->CallVoidMethodV(this, obj, methodID, args);
    va_end(args);
  }
  void CallVoidMethodV(jobject obj, jmethodID methodID, va_list args)
  {
    functions->CallVoidMethodV(this, obj, methodID, args);
  }
  void CallVoidMethodA(jobject obj, jmethodID methodID, jvalue *args)
  {
    functions->CallVoidMethodA(this, obj, methodID, args);
  }

#define CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)                                            \
  _jtype CallNonvirtual##_jname##Method(jobject obj, jclass clazz, jmethodID methodID, ...) \
  {                                                                                         \
    _jtype result;                                                                          \
    va_list args;                                                                           \
    va_start(args, methodID);                                                               \
    result = functions->CallNonvirtual##_jname##MethodV(this, obj, clazz, methodID, args);  \
    va_end(args);                                                                           \
    return result;                                                                          \
  }
#define CALL_NONVIRT_TYPE_METHODV(_jtype, _jname)                                                     \
  _jtype CallNonvirtual##_jname##MethodV(jobject obj, jclass clazz, jmethodID methodID, va_list args) \
  {                                                                                                   \
    return functions->CallNonvirtual##_jname##MethodV(this, obj, clazz, methodID, args);              \
  }
#define CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)                                                     \
  _jtype CallNonvirtual##_jname##MethodA(jobject obj, jclass clazz, jmethodID methodID, jvalue *args) \
  {                                                                                                   \
    return functions->CallNonvirtual##_jname##MethodA(this, obj, clazz, methodID, args);              \
  }

#define CALL_NONVIRT_TYPE(_jtype, _jname)   \
  CALL_NONVIRT_TYPE_METHOD(_jtype, _jname)  \
  CALL_NONVIRT_TYPE_METHODV(_jtype, _jname) \
  CALL_NONVIRT_TYPE_METHODA(_jtype, _jname)

  CALL_NONVIRT_TYPE(jobject, Object)
  CALL_NONVIRT_TYPE(jboolean, Boolean)
  CALL_NONVIRT_TYPE(jbyte, Byte)
  CALL_NONVIRT_TYPE(jchar, Char)
  CALL_NONVIRT_TYPE(jshort, Short)
  CALL_NONVIRT_TYPE(jint, Int)
  CALL_NONVIRT_TYPE(jlong, Long)
  CALL_NONVIRT_TYPE(jfloat, Float)
  CALL_NONVIRT_TYPE(jdouble, Double)

  void CallNonvirtualVoidMethod(jobject obj, jclass clazz, jmethodID methodID, ...)
  {
    va_list args;
    va_start(args, methodID);
    functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args);
    va_end(args);
  }
  void CallNonvirtualVoidMethodV(jobject obj, jclass clazz, jmethodID methodID, va_list args)
  {
    functions->CallNonvirtualVoidMethodV(this, obj, clazz, methodID, args);
  }
  void CallNonvirtualVoidMethodA(jobject obj, jclass clazz, jmethodID methodID, jvalue *args)
  {
    functions->CallNonvirtualVoidMethodA(this, obj, clazz, methodID, args);
  }

  jfieldID GetFieldID(jclass clazz, const char *name, const char *sig)
  {
    return functions->GetFieldID(this, clazz, name, sig);
  }

  jobject GetObjectField(jobject obj, jfieldID fieldID)
  {
    return functions->GetObjectField(this, obj, fieldID);
  }
  jboolean GetBooleanField(jobject obj, jfieldID fieldID)
  {
    return functions->GetBooleanField(this, obj, fieldID);
  }
  jbyte GetByteField(jobject obj, jfieldID fieldID)
  {
    return functions->GetByteField(this, obj, fieldID);
  }
  jchar GetCharField(jobject obj, jfieldID fieldID)
  {
    return functions->GetCharField(this, obj, fieldID);
  }
  jshort GetShortField(jobject obj, jfieldID fieldID)
  {
    return functions->GetShortField(this, obj, fieldID);
  }
  jint GetIntField(jobject obj, jfieldID fieldID)
  {
    return functions->GetIntField(this, obj, fieldID);
  }
  jlong GetLongField(jobject obj, jfieldID fieldID)
  {
    return functions->GetLongField(this, obj, fieldID);
  }
  jfloat GetFloatField(jobject obj, jfieldID fieldID)
  {
    return functions->GetFloatField(this, obj, fieldID);
  }
  jdouble GetDoubleField(jobject obj, jfieldID fieldID)
  {
    return functions->GetDoubleField(this, obj, fieldID);
  }

  void SetObjectField(jobject obj, jfieldID fieldID, jobject value)
  {
    functions->SetObjectField(this, obj, fieldID, value);
  }
  void SetBooleanField(jobject obj, jfieldID fieldID, jboolean value)
  {
    functions->SetBooleanField(this, obj, fieldID, value);
  }
  void SetByteField(jobject obj, jfieldID fieldID, jbyte value)
  {
    functions->SetByteField(this, obj, fieldID, value);
  }
  void SetCharField(jobject obj, jfieldID fieldID, jchar value)
  {
    functions->SetCharField(this, obj, fieldID, value);
  }
  void SetShortField(jobject obj, jfieldID fieldID, jshort value)
  {
    functions->SetShortField(this, obj, fieldID, value);
  }
  void SetIntField(jobject obj, jfieldID fieldID, jint value)
  {
    functions->SetIntField(this, obj, fieldID, value);
  }
  void SetLongField(jobject obj, jfieldID fieldID, jlong value)
  {
    functions->SetLongField(this, obj, fieldID, value);
  }
  void SetFloatField(jobject obj, jfieldID fieldID, jfloat value)
  {
    functions->SetFloatField(this, obj, fieldID, value);
  }
  void SetDoubleField(jobject obj, jfieldID fieldID, jdouble value)
  {
    functions->SetDoubleField(this, obj, fieldID, value);
  }

  jmethodID GetStaticMethodID(jclass clazz, const char *name, const char *sig)
  {
    return functions->GetStaticMethodID(this, clazz, name, sig);
  }

#define CALL_STATIC_TYPE_METHOD(_jtype, _jname)                                   \
  _jtype CallStatic##_jname##Method(jclass clazz, jmethodID methodID, ...)        \
  {                                                                               \
    _jtype result;                                                                \
    va_list args;                                                                 \
    va_start(args, methodID);                                                     \
    result = functions->CallStatic##_jname##MethodV(this, clazz, methodID, args); \
    va_end(args);                                                                 \
    return result;                                                                \
  }
#define CALL_STATIC_TYPE_METHODV(_jtype, _jname)                                     \
  _jtype CallStatic##_jname##MethodV(jclass clazz, jmethodID methodID, va_list args) \
  {                                                                                  \
    return functions->CallStatic##_jname##MethodV(this, clazz, methodID, args);      \
  }
#define CALL_STATIC_TYPE_METHODA(_jtype, _jname)                                     \
  _jtype CallStatic##_jname##MethodA(jclass clazz, jmethodID methodID, jvalue *args) \
  {                                                                                  \
    return functions->CallStatic##_jname##MethodA(this, clazz, methodID, args);      \
  }

#define CALL_STATIC_TYPE(_jtype, _jname)   \
  CALL_STATIC_TYPE_METHOD(_jtype, _jname)  \
  CALL_STATIC_TYPE_METHODV(_jtype, _jname) \
  CALL_STATIC_TYPE_METHODA(_jtype, _jname)

  CALL_STATIC_TYPE(jobject, Object)
  CALL_STATIC_TYPE(jboolean, Boolean)
  CALL_STATIC_TYPE(jbyte, Byte)
  CALL_STATIC_TYPE(jchar, Char)
  CALL_STATIC_TYPE(jshort, Short)
  CALL_STATIC_TYPE(jint, Int)
  CALL_STATIC_TYPE(jlong, Long)
  CALL_STATIC_TYPE(jfloat, Float)
  CALL_STATIC_TYPE(jdouble, Double)

  void CallStaticVoidMethod(jclass clazz, jmethodID methodID, ...)
  {
    va_list args;
    va_start(args, methodID);
    functions->CallStaticVoidMethodV(this, clazz, methodID, args);
    va_end(args);
  }
  void CallStaticVoidMethodV(jclass clazz, jmethodID methodID, va_list args)
  {
    functions->CallStaticVoidMethodV(this, clazz, methodID, args);
  }
  void CallStaticVoidMethodA(jclass clazz, jmethodID methodID, jvalue *args)
  {
    functions->CallStaticVoidMethodA(this, clazz, methodID, args);
  }

  jfieldID GetStaticFieldID(jclass clazz, const char *name, const char *sig)
  {
    return functions->GetStaticFieldID(this, clazz, name, sig);
  }

  jobject GetStaticObjectField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticObjectField(this, clazz, fieldID);
  }
  jboolean GetStaticBooleanField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticBooleanField(this, clazz, fieldID);
  }
  jbyte GetStaticByteField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticByteField(this, clazz, fieldID);
  }
  jchar GetStaticCharField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticCharField(this, clazz, fieldID);
  }
  jshort GetStaticShortField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticShortField(this, clazz, fieldID);
  }
  jint GetStaticIntField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticIntField(this, clazz, fieldID);
  }
  jlong GetStaticLongField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticLongField(this, clazz, fieldID);
  }
  jfloat GetStaticFloatField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticFloatField(this, clazz, fieldID);
  }
  jdouble GetStaticDoubleField(jclass clazz, jfieldID fieldID)
  {
    return functions->GetStaticDoubleField(this, clazz, fieldID);
  }

  void SetStaticObjectField(jclass clazz, jfieldID fieldID, jobject value)
  {
    functions->SetStaticObjectField(this, clazz, fieldID, value);
  }
  void SetStaticBooleanField(jclass clazz, jfieldID fieldID, jboolean value)
  {
    functions->SetStaticBooleanField(this, clazz, fieldID, value);
  }
  void SetStaticByteField(jclass clazz, jfieldID fieldID, jbyte value)
  {
    functions->SetStaticByteField(this, clazz, fieldID, value);
  }
  void SetStaticCharField(jclass clazz, jfieldID fieldID, jchar value)
  {
    functions->SetStaticCharField(this, clazz, fieldID, value);
  }
  void SetStaticShortField(jclass clazz, jfieldID fieldID, jshort value)
  {
    functions->SetStaticShortField(this, clazz, fieldID, value);
  }
  void SetStaticIntField(jclass clazz, jfieldID fieldID, jint value)
  {
    functions->SetStaticIntField(this, clazz, fieldID, value);
  }
  void SetStaticLongField(jclass clazz, jfieldID fieldID, jlong value)
  {
    functions->SetStaticLongField(this, clazz, fieldID, value);
  }
  void SetStaticFloatField(jclass clazz, jfieldID fieldID, jfloat value)
  {
    functions->SetStaticFloatField(this, clazz, fieldID, value);
  }
  void SetStaticDoubleField(jclass clazz, jfieldID fieldID, jdouble value)
  {
    functions->SetStaticDoubleField(this, clazz, fieldID, value);
  }

  jstring NewString(const jchar *unicodeChars, jsize len)
  {
    return functions->NewString(this, unicodeChars, len);
  }

  jsize GetStringLength(jstring string)
  {
    return functions->GetStringLength(this, string);
  }

  const jchar *GetStringChars(jstring string, jboolean *isCopy)
  {
    return functions->GetStringChars(this, string, isCopy);
  }

  void ReleaseStringChars(jstring string, const jchar *chars)
  {
    functions->ReleaseStringChars(this, string, chars);
  }

  jstring NewStringUTF(const char *bytes)
  {
    return functions->NewStringUTF(this, bytes);
  }

  jsize GetStringUTFLength(jstring string)
  {
    return functions->GetStringUTFLength(this, string);
  }

  const char *GetStringUTFChars(jstring string, jboolean *isCopy)
  {
    return functions->GetStringUTFChars(this, string, isCopy);
  }

  void ReleaseStringUTFChars(jstring string, const char *utf)
  {
    functions->ReleaseStringUTFChars(this, string, utf);
  }

  jsize GetArrayLength(jarray array)
  {
    return functions->GetArrayLength(this, array);
  }

  jobjectArray NewObjectArray(jsize length, jclass elementClass, jobject initialElement)
  {
    return functions->NewObjectArray(this, length, elementClass, initialElement);
  }

  jobject GetObjectArrayElement(jobjectArray array, jsize index)
  {
    return functions->GetObjectArrayElement(this, array, index);
  }

  void SetObjectArrayElement(jobjectArray array, jsize index, jobject value)
  {
    functions->SetObjectArrayElement(this, array, index, value);
  }

  jbooleanArray NewBooleanArray(jsize length)
  {
    return functions->NewBooleanArray(this, length);
  }
  jbyteArray NewByteArray(jsize length)
  {
    return functions->NewByteArray(this, length);
  }
  jcharArray NewCharArray(jsize length)
  {
    return functions->NewCharArray(this, length);
  }
  jshortArray NewShortArray(jsize length)
  {
    return functions->NewShortArray(this, length);
  }
  jintArray NewIntArray(jsize length)
  {
    return functions->NewIntArray(this, length);
  }
  jlongArray NewLongArray(jsize length)
  {
    return functions->NewLongArray(this, length);
  }
  jfloatArray NewFloatArray(jsize length)
  {
    return functions->NewFloatArray(this, length);
  }
  jdoubleArray NewDoubleArray(jsize length)
  {
    return functions->NewDoubleArray(this, length);
  }

  jboolean *GetBooleanArrayElements(jbooleanArray array, jboolean *isCopy)
  {
    return functions->GetBooleanArrayElements(this, array, isCopy);
  }
  jbyte *GetByteArrayElements(jbyteArray array, jboolean *isCopy)
  {
    return functions->GetByteArrayElements(this, array, isCopy);
  }
  jchar *GetCharArrayElements(jcharArray array, jboolean *isCopy)
  {
    return functions->GetCharArrayElements(this, array, isCopy);
  }
  jshort *GetShortArrayElements(jshortArray array, jboolean *isCopy)
  {
    return functions->GetShortArrayElements(this, array, isCopy);
  }
  jint *GetIntArrayElements(jintArray array, jboolean *isCopy)
  {
    return functions->GetIntArrayElements(this, array, isCopy);
  }
  jlong *GetLongArrayElements(jlongArray array, jboolean *isCopy)
  {
    return functions->GetLongArrayElements(this, array, isCopy);
  }
  jfloat *GetFloatArrayElements(jfloatArray array, jboolean *isCopy)
  {
    return functions->GetFloatArrayElements(this, array, isCopy);
  }
  jdouble *GetDoubleArrayElements(jdoubleArray array, jboolean *isCopy)
  {
    return functions->GetDoubleArrayElements(this, array, isCopy);
  }

  void ReleaseBooleanArrayElements(jbooleanArray array, jboolean *elems, jint mode)
  {
    functions->ReleaseBooleanArrayElements(this, array, elems, mode);
  }
  void ReleaseByteArrayElements(jbyteArray array, jbyte *elems, jint mode)
  {
    functions->ReleaseByteArrayElements(this, array, elems, mode);
  }
  void ReleaseCharArrayElements(jcharArray array, jchar *elems, jint mode)
  {
    functions->ReleaseCharArrayElements(this, array, elems, mode);
  }
  void ReleaseShortArrayElements(jshortArray array, jshort *elems, jint mode)
  {
    functions->ReleaseShortArrayElements(this, array, elems, mode);
  }
  void ReleaseIntArrayElements(jintArray array, jint *elems, jint mode)
  {
    functions->ReleaseIntArrayElements(this, array, elems, mode);
  }
  void ReleaseLongArrayElements(jlongArray array, jlong *elems, jint mode)
  {
    functions->ReleaseLongArrayElements(this, array, elems, mode);
  }
  void ReleaseFloatArrayElements(jfloatArray array, jfloat *elems, jint mode)
  {
    functions->ReleaseFloatArrayElements(this, array, elems, mode);
  }
  void ReleaseDoubleArrayElements(jdoubleArray array, jdouble *elems, jint mode)
  {
    functions->ReleaseDoubleArrayElements(this, array, elems, mode);
  }

  void GetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len, jboolean *buf)
  {
    functions->GetBooleanArrayRegion(this, array, start, len, buf);
  }
  void GetByteArrayRegion(jbyteArray array, jsize start, jsize len, jbyte *buf)
  {
    functions->GetByteArrayRegion(this, array, start, len, buf);
  }
  void GetCharArrayRegion(jcharArray array, jsize start, jsize len, jchar *buf)
  {
    functions->GetCharArrayRegion(this, array, start, len, buf);
  }
  void GetShortArrayRegion(jshortArray array, jsize start, jsize len, jshort *buf)
  {
    functions->GetShortArrayRegion(this, array, start, len, buf);
  }
  void GetIntArrayRegion(jintArray array, jsize start, jsize len, jint *buf)
  {
    functions->GetIntArrayRegion(this, array, start, len, buf);
  }
  void GetLongArrayRegion(jlongArray array, jsize start, jsize len, jlong *buf)
  {
    functions->GetLongArrayRegion(this, array, start, len, buf);
  }
  void GetFloatArrayRegion(jfloatArray array, jsize start, jsize len, jfloat *buf)
  {
    functions->GetFloatArrayRegion(this, array, start, len, buf);
  }
  void GetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len, jdouble *buf)
  {
    functions->GetDoubleArrayRegion(this, array, start, len, buf);
  }

  void SetBooleanArrayRegion(jbooleanArray array, jsize start, jsize len, const jboolean *buf)
  {
    functions->SetBooleanArrayRegion(this, array, start, len, buf);
  }
  void SetByteArrayRegion(jbyteArray array, jsize start, jsize len, const jbyte *buf)
  {
    functions->SetByteArrayRegion(this, array, start, len, buf);
  }
  void SetCharArrayRegion(jcharArray array, jsize start, jsize len, const jchar *buf)
  {
    functions->SetCharArrayRegion(this, array, start, len, buf);
  }
  void SetShortArrayRegion(jshortArray array, jsize start, jsize len, const jshort *buf)
  {
    functions->SetShortArrayRegion(this, array, start, len, buf);
  }
  void SetIntArrayRegion(jintArray array, jsize start, jsize len, const jint *buf)
  {
    functions->SetIntArrayRegion(this, array, start, len, buf);
  }
  void SetLongArrayRegion(jlongArray array, jsize start, jsize len, const jlong *buf)
  {
    functions->SetLongArrayRegion(this, array, start, len, buf);
  }
  void SetFloatArrayRegion(jfloatArray array, jsize start, jsize len, const jfloat *buf)
  {
    functions->SetFloatArrayRegion(this, array, start, len, buf);
  }
  void SetDoubleArrayRegion(jdoubleArray array, jsize start, jsize len, const jdouble *buf)
  {
    functions->SetDoubleArrayRegion(this, array, start, len, buf);
  }

  jint RegisterNatives(jclass clazz, const JNINativeMethod *methods, jint nMethods)
  {
    return functions->RegisterNatives(this, clazz, methods, nMethods);
  }

  jint UnregisterNatives(jclass clazz)
  {
    return functions->UnregisterNatives(this, clazz);
  }

  jint MonitorEnter(jobject obj)
  {
    return functions->MonitorEnter(this, obj);
  }

  jint MonitorExit(jobject obj)
  {
    return functions->MonitorExit(this, obj);
  }

  jint GetJavaVM(JavaVM **vm)
  {
    return functions->GetJavaVM(this, vm);
  }

  void GetStringRegion(jstring str, jsize start, jsize len, jchar *buf)
  {
    functions->GetStringRegion(this, str, start, len, buf);
  }

  void GetStringUTFRegion(jstring str, jsize start, jsize len, char *buf)
  {
    return functions->GetStringUTFRegion(this, str, start, len, buf);
  }

  void *GetPrimitiveArrayCritical(jarray array, jboolean *isCopy)
  {
    return functions->GetPrimitiveArrayCritical(this, array, isCopy);
  }

  void ReleasePrimitiveArrayCritical(jarray array, void *carray, jint mode)
  {
    functions->ReleasePrimitiveArrayCritical(this, array, carray, mode);
  }

  const jchar *GetStringCritical(jstring string, jboolean *isCopy)
  {
    return functions->GetStringCritical(this, string, isCopy);
  }

  void ReleaseStringCritical(jstring string, const jchar *carray)
  {
    functions->ReleaseStringCritical(this, string, carray);
  }

  jweak NewWeakGlobalRef(jobject obj)
  {
    return functions->NewWeakGlobalRef(this, obj);
  }

  void DeleteWeakGlobalRef(jweak obj)
  {
    functions->DeleteWeakGlobalRef(this, obj);
  }

  jboolean ExceptionCheck()
  {
    return functions->ExceptionCheck(this);
  }

  jobject NewDirectByteBuffer(void *address, jlong capacity)
  {
    return functions->NewDirectByteBuffer(this, address, capacity);
  }

  void *GetDirectBufferAddress(jobject buf)
  {
    return functions->GetDirectBufferAddress(this, buf);
  }

  jlong GetDirectBufferCapacity(jobject buf)
  {
    return functions->GetDirectBufferCapacity(this, buf);
  }

  /* added in JNI 1.6 */
  jobjectRefType GetObjectRefType(jobject obj)
  {
    return functions->GetObjectRefType(this, obj);
  }
#endif /*__cplusplus*/
};

/*
 * JNI invocation interface.
 */
struct JNIInvokeInterface {
  void *reserved0;
  void *reserved1;
  void *reserved2;

  jint (*DestroyJavaVM)(JavaVM *);
  jint (*AttachCurrentThread)(JavaVM *, JNIEnv **, void *);
  jint (*DetachCurrentThread)(JavaVM *);
  jint (*GetEnv)(JavaVM *, void **, jint);
  jint (*AttachCurrentThreadAsDaemon)(JavaVM *, JNIEnv **, void *);
};

/*
 * C++ version.
 */
struct _JavaVM {
  const struct JNIInvokeInterface *functions;

#if defined(__cplusplus)
  jint DestroyJavaVM()
  {
    return functions->DestroyJavaVM(this);
  }
  jint AttachCurrentThread(JNIEnv **p_env, void *thr_args)
  {
    return functions->AttachCurrentThread(this, p_env, thr_args);
  }
  jint DetachCurrentThread()
  {
    return functions->DetachCurrentThread(this);
  }
  jint GetEnv(void **env, jint version)
  {
    return functions->GetEnv(this, env, version);
  }
  jint AttachCurrentThreadAsDaemon(JNIEnv **p_env, void *thr_args)
  {
    return functions->AttachCurrentThreadAsDaemon(this, p_env, thr_args);
  }
#endif /*__cplusplus*/
};

struct JavaVMAttachArgs {
  jint version; /* must be >= JNI_VERSION_1_2 */
  const char *name; /* NULL or name of thread as modified UTF-8 str */
  jobject group; /* global ref of a ThreadGroup object, or NULL */
};
typedef struct JavaVMAttachArgs JavaVMAttachArgs;

/*
 * JNI 1.2+ initialization.  (As of 1.6, the pre-1.2 structures are no
 * longer supported.)
 */
typedef struct JavaVMOption {
  const char *optionString;
  void *extraInfo;
} JavaVMOption;

typedef struct JavaVMInitArgs {
  jint version; /* use JNI_VERSION_1_2 or later */

  jint nOptions;
  JavaVMOption *options;
  jboolean ignoreUnrecognized;
} JavaVMInitArgs;

#ifdef __cplusplus
extern "C" {
#endif
/*
 * VM initialization functions.
 *
 * Note these are the only symbols exported for JNI by the VM.
 */
jint JNI_GetDefaultJavaVMInitArgs(void *);
jint JNI_CreateJavaVM(JavaVM **, JNIEnv **, void *);
jint JNI_GetCreatedJavaVMs(JavaVM **, jsize, jsize *);

#define JNIIMPORT
#define JNIEXPORT __attribute__((visibility("default")))
#define JNICALL

/*
 * Prototypes for functions exported by loadable shared libs.  These are
 * called by JNI, not provided by JNI.
 */
JNIEXPORT jint JNI_OnLoad(JavaVM *vm, void *reserved);
JNIEXPORT void JNI_OnUnload(JavaVM *vm, void *reserved);

#ifdef __cplusplus
}
#endif

/*
 * Manifest constants.
 */
#define JNI_FALSE 0
#define JNI_TRUE 1

#define JNI_VERSION_1_1 0x00010001
#define JNI_VERSION_1_2 0x00010002
#define JNI_VERSION_1_4 0x00010004
#define JNI_VERSION_1_6 0x00010006

#define JNI_OK (0) /* no error */
#define JNI_ERR (-1) /* generic error */
#define JNI_EDETACHED (-2) /* thread detached from the VM */
#define JNI_EVERSION (-3) /* JNI version error */

#define JNI_COMMIT 1 /* copy content, do not free buffer */
#define JNI_ABORT 2 /* free buffer w/o copying back */

#endif /* JNI_H_ */