diff options
Diffstat (limited to 'lttng/org.eclipse.linuxtools.ctf.core/src/org/eclipse/linuxtools/ctf/core/event/types/FloatDeclaration.java')
| -rw-r--r-- | lttng/org.eclipse.linuxtools.ctf.core/src/org/eclipse/linuxtools/ctf/core/event/types/FloatDeclaration.java | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/lttng/org.eclipse.linuxtools.ctf.core/src/org/eclipse/linuxtools/ctf/core/event/types/FloatDeclaration.java b/lttng/org.eclipse.linuxtools.ctf.core/src/org/eclipse/linuxtools/ctf/core/event/types/FloatDeclaration.java deleted file mode 100644 index 084cae691f..0000000000 --- a/lttng/org.eclipse.linuxtools.ctf.core/src/org/eclipse/linuxtools/ctf/core/event/types/FloatDeclaration.java +++ /dev/null @@ -1,177 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2011, 2013 Ericsson, Ecole Polytechnique de Montreal and others - * - * All rights reserved. This program and the accompanying materials are made - * available under the terms of the Eclipse Public License v1.0 which - * accompanies this distribution, and is available at - * http://www.eclipse.org/legal/epl-v10.html - * - * Contributors: Matthew Khouzam - Initial API and implementation - *******************************************************************************/ - -package org.eclipse.linuxtools.ctf.core.event.types; - -import java.nio.ByteOrder; - -import org.eclipse.linuxtools.ctf.core.event.io.BitBuffer; -import org.eclipse.linuxtools.ctf.core.event.scope.IDefinitionScope; -import org.eclipse.linuxtools.ctf.core.trace.CTFReaderException; - -/** - * A CTF float declaration. - * - * The declaration of a floating point basic data type. - * - * @version 1.0 - * @author Matthew Khouzam - */ -public final class FloatDeclaration extends Declaration implements ISimpleDatatypeDeclaration { - - // ------------------------------------------------------------------------ - // Attributes - // ------------------------------------------------------------------------ - - private final int fMantissa; - private final int fExponent; - private final ByteOrder fByteOrder; - private final long fAlignement; - - // ------------------------------------------------------------------------ - // Constructors - // ------------------------------------------------------------------------ - - /** - * Constructor - * - * @param exponent - * The exponent size in bits - * @param mantissa - * The mantissa size in bits (+1 for sign) (see CTF spec) - * @param byteOrder - * The byte order - * @param alignment - * The alignment. Should be ≥ 1 - */ - public FloatDeclaration(int exponent, int mantissa, ByteOrder byteOrder, - long alignment) { - fMantissa = mantissa; - fExponent = exponent; - fByteOrder = byteOrder; - fAlignement = Math.max(alignment, 1); - - } - - // ------------------------------------------------------------------------ - // Getters/Setters/Predicates - // ------------------------------------------------------------------------ - - /** - * @return the mant - */ - public int getMantissa() { - return fMantissa; - } - - /** - * @return the exp - */ - public int getExponent() { - return fExponent; - } - - /** - * @return the byteOrder - */ - public ByteOrder getByteOrder() { - return fByteOrder; - } - - @Override - public long getAlignment() { - return fAlignement; - } - - /** - * @since 3.0 - */ - @Override - public int getMaximumSize() { - return fMantissa + fExponent + 1; - } - - // ------------------------------------------------------------------------ - // Operations - // ------------------------------------------------------------------------ - - /** - * @since 3.0 - */ - @Override - public FloatDefinition createDefinition(IDefinitionScope definitionScope, - String fieldName, BitBuffer input) throws CTFReaderException { - ByteOrder byteOrder = input.getByteOrder(); - input.setByteOrder(fByteOrder); - double value = read(input); - input.setByteOrder(byteOrder); - return new FloatDefinition(this, definitionScope, fieldName, value); - } - - @Override - public String toString() { - /* Only used for debugging */ - return "[declaration] float[" + Integer.toHexString(hashCode()) + ']'; //$NON-NLS-1$ - } - - private double read(BitBuffer input) throws CTFReaderException { - /* Offset the buffer position wrt the current alignment */ - alignRead(input); - final int exp = getExponent(); - final int mant = getMantissa(); - double value = Double.NaN; - if ((exp + mant) == 32) { - value = readRawFloat32(input, mant, exp); - } else if ((exp + mant) == 64) { - value = readRawFloat64(input, mant, exp); - } - return value; - } - - private static double readRawFloat32(BitBuffer input, final int manBits, - final int expBits) throws CTFReaderException { - long temp = input.get(32, false); - return createFloat(temp, manBits - 1, expBits); - } - - private static double readRawFloat64(BitBuffer input, final int manBits, - final int expBits) throws CTFReaderException { - long temp = input.get(64, false); - return createFloat(temp, manBits - 1, expBits); - } - - /** - * Create a float from the raw value, Mathematicians beware. - * - * @param rawValue - * The raw value( up to 64 bits) - * @param manBits - * number of bits in the mantissa - * @param expBits - * number of bits in the exponent - */ - private static double createFloat(long rawValue, final int manBits, - final int expBits) { - long manShift = 1L << (manBits); - long manMask = manShift - 1; - long expMask = (1L << expBits) - 1; - - int exp = (int) ((rawValue >> (manBits)) & expMask) + 1; - long man = (rawValue & manMask); - final int offsetExponent = exp - (1 << (expBits - 1)); - double expPow = Math.pow(2.0, offsetExponent); - double ret = man * 1.0f; - ret /= manShift; - ret += 1.0; - ret *= expPow; - return ret; - } -} |