Orion Hodson | e77ecef | 2020-06-02 12:18:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "include_platform/nativehelper/JNIPlatformHelp.h" |
| 18 | |
| 19 | #include <stddef.h> |
| 20 | |
| 21 | #include "JniConstants.h" |
| 22 | |
| 23 | static int GetBufferPosition(JNIEnv* env, jobject nioBuffer) { |
| 24 | return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer_position(env)); |
| 25 | } |
| 26 | |
| 27 | static int GetBufferLimit(JNIEnv* env, jobject nioBuffer) { |
| 28 | return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer_limit(env)); |
| 29 | } |
| 30 | |
| 31 | static int GetBufferElementSizeShift(JNIEnv* env, jobject nioBuffer) { |
| 32 | return(*env)->GetIntField(env, nioBuffer, JniConstants_NioBuffer__elementSizeShift(env)); |
| 33 | } |
| 34 | |
Orion Hodson | e77ecef | 2020-06-02 12:18:23 +0100 | [diff] [blame] | 35 | jarray jniGetNioBufferBaseArray(JNIEnv* env, jobject nioBuffer) { |
| 36 | jclass nioAccessClass = JniConstants_NIOAccessClass(env); |
| 37 | jmethodID getBaseArrayMethod = JniConstants_NIOAccess_getBaseArray(env); |
| 38 | jobject object = (*env)->CallStaticObjectMethod(env, |
| 39 | nioAccessClass, getBaseArrayMethod, nioBuffer); |
| 40 | return (jarray) object; |
| 41 | } |
| 42 | |
| 43 | int jniGetNioBufferBaseArrayOffset(JNIEnv* env, jobject nioBuffer) { |
| 44 | jclass nioAccessClass = JniConstants_NIOAccessClass(env); |
| 45 | jmethodID getBaseArrayOffsetMethod = JniConstants_NIOAccess_getBaseArrayOffset(env); |
| 46 | return (*env)->CallStaticIntMethod(env, nioAccessClass, getBaseArrayOffsetMethod, nioBuffer); |
| 47 | } |
| 48 | |
| 49 | jlong jniGetNioBufferPointer(JNIEnv* env, jobject nioBuffer) { |
| 50 | jlong baseAddress = (*env)->GetLongField(env, nioBuffer, JniConstants_NioBuffer_address(env)); |
| 51 | if (baseAddress != 0) { |
| 52 | const int position = GetBufferPosition(env, nioBuffer); |
| 53 | const int shift = GetBufferElementSizeShift(env, nioBuffer); |
| 54 | baseAddress += position << shift; |
| 55 | } |
| 56 | return baseAddress; |
| 57 | } |
| 58 | |
| 59 | jlong jniGetNioBufferFields(JNIEnv* env, jobject nioBuffer, |
| 60 | jint* position, jint* limit, jint* elementSizeShift) { |
| 61 | *position = GetBufferPosition(env, nioBuffer); |
| 62 | *limit = GetBufferLimit(env, nioBuffer); |
| 63 | *elementSizeShift = GetBufferElementSizeShift(env, nioBuffer); |
| 64 | return (*env)->GetLongField(env, nioBuffer, JniConstants_NioBuffer_address(env)); |
| 65 | } |