/*
 * 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_ */
