66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "include_platform/nativehelper/JNIPlatformHelp.h"
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#include <stddef.h>
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#include "JniConstants.h"
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static int GetBufferPosition(JNIEnv* env, jobject nioBuffer) {
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return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer_position(env));
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}
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static int GetBufferLimit(JNIEnv* env, jobject nioBuffer) {
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return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer_limit(env));
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}
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static int GetBufferElementSizeShift(JNIEnv* env, jobject nioBuffer) {
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return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer__elementSizeShift(env));
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}
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jarray jniGetNioBufferBaseArray(JNIEnv* env, jobject nioBuffer) {
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jclass nioAccessClass = JniConstants_NIOAccessClass(env);
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jmethodID getBaseArrayMethod = JniConstants_NIOAccess_getBaseArray(env);
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jobject object = (*env)->CallStaticObjectMethod(env,
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nioAccessClass, getBaseArrayMethod, nioBuffer);
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return (jarray) object;
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}
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int jniGetNioBufferBaseArrayOffset(JNIEnv* env, jobject nioBuffer) {
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jclass nioAccessClass = JniConstants_NIOAccessClass(env);
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jmethodID getBaseArrayOffsetMethod = JniConstants_NIOAccess_getBaseArrayOffset(env);
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return (*env)->CallStaticIntMethod(env, nioAccessClass, getBaseArrayOffsetMethod, nioBuffer);
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}
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jlong jniGetNioBufferPointer(JNIEnv* env, jobject nioBuffer) {
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jlong baseAddress = (*env)->GetLongField(env, nioBuffer, JniConstants_NioBuffer_address(env));
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if (baseAddress != 0) {
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const int position = GetBufferPosition(env, nioBuffer);
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const int shift = GetBufferElementSizeShift(env, nioBuffer);
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baseAddress += position << shift;
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}
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return baseAddress;
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}
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jlong jniGetNioBufferFields(JNIEnv* env, jobject nioBuffer,
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jint* position, jint* limit, jint* elementSizeShift) {
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*position = GetBufferPosition(env, nioBuffer);
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*limit = GetBufferLimit(env, nioBuffer);
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*elementSizeShift = GetBufferElementSizeShift(env, nioBuffer);
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return (*env)->GetLongField(env, nioBuffer, JniConstants_NioBuffer_address(env));
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}
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