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/*
* 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.
*/
#include "include_platform/nativehelper/JNIPlatformHelp.h"
#include <stddef.h>
#include "JniConstants.h"
static int GetBufferPosition(JNIEnv* env, jobject nioBuffer) {
return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer_position(env));
}
static int GetBufferLimit(JNIEnv* env, jobject nioBuffer) {
return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer_limit(env));
}
static int GetBufferElementSizeShift(JNIEnv* env, jobject nioBuffer) {
return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer__elementSizeShift(env));
}
jarray jniGetNioBufferBaseArray(JNIEnv* env, jobject nioBuffer) {
jclass nioAccessClass = JniConstants_NIOAccessClass(env);
jmethodID getBaseArrayMethod = JniConstants_NIOAccess_getBaseArray(env);
jobject object = (*env)->CallStaticObjectMethod(env,
nioAccessClass, getBaseArrayMethod, nioBuffer);
return (jarray) object;
}
int jniGetNioBufferBaseArrayOffset(JNIEnv* env, jobject nioBuffer) {
jclass nioAccessClass = JniConstants_NIOAccessClass(env);
jmethodID getBaseArrayOffsetMethod = JniConstants_NIOAccess_getBaseArrayOffset(env);
return (*env)->CallStaticIntMethod(env, nioAccessClass, getBaseArrayOffsetMethod, nioBuffer);
}
jlong jniGetNioBufferPointer(JNIEnv* env, jobject nioBuffer) {
jlong baseAddress = (*env)->GetLongField(env, nioBuffer, JniConstants_NioBuffer_address(env));
if (baseAddress != 0) {
const int position = GetBufferPosition(env, nioBuffer);
const int shift = GetBufferElementSizeShift(env, nioBuffer);
baseAddress += position << shift;
}
return baseAddress;
}
jlong jniGetNioBufferFields(JNIEnv* env, jobject nioBuffer,
jint* position, jint* limit, jint* elementSizeShift) {
*position = GetBufferPosition(env, nioBuffer);
*limit = GetBufferLimit(env, nioBuffer);
*elementSizeShift = GetBufferElementSizeShift(env, nioBuffer);
return (*env)->GetLongField(env, nioBuffer, JniConstants_NioBuffer_address(env));
}
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