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/*
* The MIT License
*
* Copyright (c) 2017-2019 JOML
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package org.joml.internal;
public final class Runtime {
public static final boolean HAS_floatToRawIntBits = hasFloatToRawIntBits();
public static final boolean HAS_doubleToRawLongBits = hasDoubleToRawLongBits();
private Runtime() {
}
private static boolean hasFloatToRawIntBits() {
try {
Float.class.getDeclaredMethod("floatToRawIntBits", new Class[] { float.class });
return true;
} catch (NoSuchMethodException e) {
return false;
}
}
private static boolean hasDoubleToRawLongBits() {
try {
Double.class.getDeclaredMethod("doubleToRawLongBits", new Class[] { double.class });
return true;
} catch (NoSuchMethodException e) {
return false;
}
}
public static int floatToIntBits(float flt) {
if (HAS_floatToRawIntBits)
return floatToIntBits1_3(flt);
return floatToIntBits1_2(flt);
}
private static int floatToIntBits1_3(float flt) {
return Float.floatToRawIntBits(flt);
}
private static int floatToIntBits1_2(float flt) {
return Float.floatToIntBits(flt);
}
public static long doubleToLongBits(double dbl) {
if (HAS_doubleToRawLongBits)
return doubleToLongBits1_3(dbl);
return doubleToLongBits1_2(dbl);
}
private static long doubleToLongBits1_3(double dbl) {
return Double.doubleToRawLongBits(dbl);
}
private static long doubleToLongBits1_2(double dbl) {
return Double.doubleToLongBits(dbl);
}
public static String formatNumbers(String str) {
StringBuffer res = new StringBuffer();
int eIndex = Integer.MIN_VALUE;
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c == 'E') {
eIndex = i;
} else if (c == ' ' && eIndex == i - 1) {
// workaround Java 1.4 DecimalFormat bug
res.append('+');
continue;
} else if (Character.isDigit(c) && eIndex == i - 1) {
res.append('+');
}
res.append(c);
}
return res.toString();
}
/*
* From the JRE's Float.compare().
*/
private static int compare(float f1, float f2) {
if (f1 < f2)
return -1; // Neither val is NaN, thisVal is smaller
if (f1 > f2)
return 1; // Neither val is NaN, thisVal is larger
// Cannot use floatToRawIntBits because of possibility of NaNs.
int thisBits = Float.floatToIntBits(f1);
int anotherBits = Float.floatToIntBits(f2);
return (thisBits == anotherBits ? 0 : // Values are equal
(thisBits < anotherBits ? -1 : // (-0.0, 0.0) or (!NaN, NaN)
1)); // (0.0, -0.0) or (NaN, !NaN)
}
/*
* From the JRE's Double.compare().
*/
private static int compare(double d1, double d2) {
if (d1 < d2)
return -1; // Neither val is NaN, thisVal is smaller
if (d1 > d2)
return 1; // Neither val is NaN, thisVal is larger
// Cannot use doubleToRawLongBits because of possibility of NaNs.
long thisBits = Double.doubleToLongBits(d1);
long anotherBits = Double.doubleToLongBits(d2);
return (thisBits == anotherBits ? 0 : // Values are equal
(thisBits < anotherBits ? -1 : // (-0.0, 0.0) or (!NaN, NaN)
1)); // (0.0, -0.0) or (NaN, !NaN)
}
public static boolean equals(float a, float b, float delta) {
if (compare(a, b) == 0)
return true;
if (Math.abs(a - b) > delta)
return false;
return true;
}
public static boolean equals(double a, double b, double delta) {
if (compare(a, b) == 0)
return true;
if (Math.abs(a - b) > delta)
return false;
return true;
}
}
