You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
2.6 KiB
66 lines
2.6 KiB
/*
|
|
* 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));
|
|
}
|