| /* |
| * 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)); |
| } |