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/*
* Copyright (C) 2005 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.
*/
#define LOG_TAG "Double"
#include "JNIHelp.h"
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
typedef union {
uint64_t bits;
double d;
} Double;
#define NaN (0x7ff8000000000000ULL)
/*
* public static native long doubleToLongBits(double value)
*/
static jlong doubleToLongBits(JNIEnv*, jclass, jdouble val)
{
Double d;
d.d = val;
// For this method all values in the NaN range are
// normalized to the canonical NaN value.
if (isnan(d.d))
d.bits = NaN;
return d.bits;
}
/*
* public static native long doubleToRawLongBits(double value)
*/
static jlong doubleToRawLongBits(JNIEnv*, jclass, jdouble val)
{
Double d;
d.d = val;
return d.bits;
}
/*
* public static native double longBitsToDouble(long bits)
*/
static jdouble longBitsToDouble(JNIEnv*, jclass, jlong val)
{
Double d;
d.bits = val;
return d.d;
}
static JNINativeMethod gMethods[] = {
{ "doubleToLongBits", "(D)J", (void*)doubleToLongBits },
{ "doubleToRawLongBits", "(D)J", (void*)doubleToRawLongBits },
{ "longBitsToDouble", "(J)D", (void*)longBitsToDouble },
};
int register_java_lang_Double(JNIEnv* env) {
return jniRegisterNativeMethods(env, "java/lang/Double", gMethods, NELEM(gMethods));
}
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