Double.c

/*
 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation. Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

#include"jni.h"
#include"jni_util.h"
#include"jlong.h"
#include"jvm.h"

#include"java_lang_Double.h"

/*
 * Find the double float corresponding to a given bit pattern
 */
JNIEXPORTjdoubleJNICALL
Java_java_lang_Double_longBitsToDouble(JNIEnv*env, jclassunused, jlongv)
{
union {
jlongl;
doubled;
 } u;
jlong_to_jdouble_bits(&v);
u.l=v;
return (jdouble)u.d;
}

/*
 * Find the bit pattern corresponding to a given double float, NOT collapsing NaNs
 */
JNIEXPORTjlongJNICALL
Java_java_lang_Double_doubleToRawLongBits(JNIEnv*env, jclassunused, jdoublev)
{
union {
jlongl;
doubled;
 } u;
jdouble_to_jlong_bits(&v);
u.d= (double)v;
returnu.l;
}