de.intarsys.pdf.cos.COSFixed Maven / Gradle / Ivy
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This is a fork of http://sourceforge.net/projects/jpodlib/ as development seems to be frozen.
We're providing some bug fixes along with deployments to maven.
/*
* Copyright (c) 2007, intarsys consulting GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of intarsys nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package de.intarsys.pdf.cos;
/**
* Represents floating point numbers in pdf.
*/
public class COSFixed extends COSNumber {
public static final int DEFAULT_PRECISION = 5;
public static COSFixed create(byte[] bytes, int start, int length) {
long result = 0;
long decimal = 1;
int end = start + length;
boolean negative = false;
boolean point = false;
int precision = 0;
int i = start;
byte prefix = bytes[i];
if (prefix == '+') {
i++;
} else if (prefix == '-') {
negative = true;
i++;
}
for (; i < end; i++) {
byte digit = bytes[i];
if (digit == '.') {
point = true;
} else {
result = ((result * 10) + digit) - '0';
if (point) {
decimal = decimal * 10;
precision++;
}
}
}
if (negative) {
return new COSFixed(-(float) ((double) result / decimal), precision);
}
return new COSFixed((float) ((double) result / decimal), precision);
}
public static COSFixed create(double value) {
return new COSFixed((float) value, DEFAULT_PRECISION);
}
public static COSFixed create(double value, int precision) {
return new COSFixed((float) value, precision);
}
public static COSFixed create(float value) {
return new COSFixed(value, DEFAULT_PRECISION);
}
public static COSFixed create(float value, int precision) {
return new COSFixed(value, precision);
}
private final float floatValue;
private byte precision;
protected COSFixed(float value, int precision) {
this.floatValue = value;
this.precision = (byte) precision;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.pdf.cos.COSObject#accept(de.intarsys.pdf.cos.ICOSObjectVisitor)
*/
@Override
public java.lang.Object accept(ICOSObjectVisitor visitor) throws COSVisitorException {
return visitor.visitFromFixed(this);
}
/*
* (non-Javadoc)
*
* @see de.intarsys.pdf.cos.COSObject#asFixed()
*/
@Override
public COSFixed asFixed() {
return this;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.pdf.cos.COSObject#basicToString()
*/
@Override
protected String basicToString() {
return String.valueOf(floatValue);
}
@Override
protected COSObject copyBasic() {
return new COSFixed(floatValue, precision);
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object o) {
if (!(o instanceof COSFixed)) {
return false;
}
return floatValue == ((COSFixed) o).floatValue;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.pdf.cos.COSNumber#floatValue()
*/
@Override
public float floatValue() {
return floatValue;
}
/**
* The precision (digits after period) for this.
*
* @return The precision (digits after period) for this.
*/
public int getPrecision() {
return precision;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return Float.floatToIntBits(floatValue);
}
/*
* (non-Javadoc)
*
* @see de.intarsys.pdf.cos.COSNumber#intValue()
*/
@Override
public int intValue() {
return (int) floatValue;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.pdf.cos.COSObject#restoreState(java.lang.Object)
*/
@Override
public void restoreState(Object object) {
super.restoreState(object);
COSFixed fixed = (COSFixed) object;
this.precision = fixed.precision;
}
/*
* (non-Javadoc)
*
* @see de.intarsys.tools.objectsession.ISaveStateSupport#saveState()
*/
@Override
public Object saveState() {
COSFixed result = new COSFixed(floatValue, precision);
result.container = this.container.saveStateContainer();
return result;
}
/**
* Assign the precision for this.
*
* @param precision The new precision.
*/
public void setPrecision(int precision) {
this.precision = (byte) precision;
}
}