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//
// java_lang_Double.c
// Android
//
// Copyright 2005 The Android Open Source Project
//
#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* env, jclass clazz, 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* env, jclass clazz, jdouble val)
{
Double d;
d.d = val;
return d.bits;
}
/*
* public static native double longBitsToDouble(long bits)
*/
static jdouble longBitsToDouble(JNIEnv* env, jclass clazz, jlong val)
{
Double d;
d.bits = val;
return d.d;
}
/*
* JNI registration
*/
static JNINativeMethod gMethods[] = {
/* name, signature, funcPtr */
{ "doubleToLongBits", "(D)J", doubleToLongBits },
{ "doubleToRawLongBits", "(D)J", doubleToRawLongBits },
{ "longBitsToDouble", "(J)D", longBitsToDouble },
};
int register_java_lang_Double(JNIEnv* env)
{
return jniRegisterNativeMethods(env, "java/lang/Double",
gMethods, NELEM(gMethods));
}
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