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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2015 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* ConvertToFloat.java
* ---------------
*/
package org.jpedal.io.types;
public class ConvertToFloat {
static float convert(final char[] stream) {
final float d;
final float dec;
final float num;
final int start = 0;
final int charCount = stream.length;
int ptr = charCount;
int intStart = 0;
boolean isMinus = false;
//hand optimised float code
//find decimal point
for (int j = charCount - 1; j > -1; j--) {
if (stream[start + j] == 46) { //'.'=46
ptr = j;
break;
}
}
int intChars = ptr;
//allow for minus
if (stream[start] == 43) { //'+'=43
intChars--;
intStart++;
} else if (stream[start] == 45) { //'-'=45
intStart++;
isMinus = true;
}
//optimisations
final int intNumbers = intChars - intStart;
final int decNumbers = charCount - ptr;
if ((intNumbers > 4)) { //non-optimised to cover others
isMinus = false;
d = Float.parseFloat(new String(stream));
} else {
float thous = 0f, units = 0f, tens = 0f, hundreds = 0f, tenths = 0f, hundredths = 0f, thousands = 0f, tenthousands = 0f, hunthousands = 0f;
//thousands
if (intNumbers > 3) {
thous = getThousands(stream[start + intStart] - 48);
intStart++;
}
//hundreds
if (intNumbers > 2) {
hundreds = getHundreds(stream[start + intStart] - 48);
intStart++;
}
//tens
if (intNumbers > 1) {
tens = getTens(stream[start + intStart] - 48);
intStart++;
}
//units
if (intNumbers > 0) {
units = getUnits(stream[start + intStart] - 48);
}
//tenths
if (decNumbers > 1) {
ptr++; //move beyond.
tenths = getTenths(stream[start + ptr] - 48);
}
//hundredths
if (decNumbers > 2) {
ptr++; //move beyond.
hundredths = getHundredths(stream[start + ptr] - 48);
}
//thousands
if (decNumbers > 3) {
ptr++; //move beyond.
thousands = getThousandths(stream[start + ptr] - 48);
}
//tenthousands
if (decNumbers > 4) {
ptr++; //move beyond.
tenthousands = getTenThousandths(stream[start + ptr] - 48);
}
// q00thousands
if (decNumbers > 5) {
ptr++; //move beyond.
hunthousands = getHundredThousandths(stream[start + ptr] - 48);
}
dec = tenths + hundredths + thousands + tenthousands + hunthousands;
num = thous + hundreds + tens + units;
d = num + dec;
}
if (isMinus) {
return -d;
} else {
return d;
}
}
private static float getHundredThousandths(int c) {
float hunthousands=0;
switch (c) {
case 1:
hunthousands = 0.00001f;
break;
case 2:
hunthousands = 0.00002f;
break;
case 3:
hunthousands = 0.00003f;
break;
case 4:
hunthousands = 0.00004f;
break;
case 5:
hunthousands = 0.00005f;
break;
case 6:
hunthousands = 0.00006f;
break;
case 7:
hunthousands = 0.00007f;
break;
case 8:
hunthousands = 0.00008f;
break;
case 9:
hunthousands = 0.00009f;
break;
}
return hunthousands;
}
private static float getTenThousandths(int c) {
float tenthousands=0;
switch (c) {
case 1:
tenthousands = 0.0001f;
break;
case 2:
tenthousands = 0.0002f;
break;
case 3:
tenthousands = 0.0003f;
break;
case 4:
tenthousands = 0.0004f;
break;
case 5:
tenthousands = 0.0005f;
break;
case 6:
tenthousands = 0.0006f;
break;
case 7:
tenthousands = 0.0007f;
break;
case 8:
tenthousands = 0.0008f;
break;
case 9:
tenthousands = 0.0009f;
break;
}
return tenthousands;
}
private static float getThousandths(int c) {
float thousands=0;
switch (c) {
case 1:
thousands = 0.001f;
break;
case 2:
thousands = 0.002f;
break;
case 3:
thousands = 0.003f;
break;
case 4:
thousands = 0.004f;
break;
case 5:
thousands = 0.005f;
break;
case 6:
thousands = 0.006f;
break;
case 7:
thousands = 0.007f;
break;
case 8:
thousands = 0.008f;
break;
case 9:
thousands = 0.009f;
break;
}
return thousands;
}
private static float getHundredths(int c) {
float hundredths=0;
switch (c) {
case 1:
hundredths = 0.01f;
break;
case 2:
hundredths = 0.02f;
break;
case 3:
hundredths = 0.03f;
break;
case 4:
hundredths = 0.04f;
break;
case 5:
hundredths = 0.05f;
break;
case 6:
hundredths = 0.06f;
break;
case 7:
hundredths = 0.07f;
break;
case 8:
hundredths = 0.08f;
break;
case 9:
hundredths = 0.09f;
break;
}
return hundredths;
}
private static float getTenths(int c) {
float tenths=0;
switch (c) {
case 1:
tenths = 0.1f;
break;
case 2:
tenths = 0.2f;
break;
case 3:
tenths = 0.3f;
break;
case 4:
tenths = 0.4f;
break;
case 5:
tenths = 0.5f;
break;
case 6:
tenths = 0.6f;
break;
case 7:
tenths = 0.7f;
break;
case 8:
tenths = 0.8f;
break;
case 9:
tenths = 0.9f;
break;
}
return tenths;
}
private static float getUnits(int c) {
float units=0;
switch (c) {
case 1:
units = 1.0f;
break;
case 2:
units = 2.0f;
break;
case 3:
units = 3.0f;
break;
case 4:
units = 4.0f;
break;
case 5:
units = 5.0f;
break;
case 6:
units = 6.0f;
break;
case 7:
units = 7.0f;
break;
case 8:
units = 8.0f;
break;
case 9:
units = 9.0f;
break;
}
return units;
}
private static float getTens(int c) {
float tens=0;
switch (c) {
case 1:
tens = 10.0f;
break;
case 2:
tens = 20.0f;
break;
case 3:
tens = 30.0f;
break;
case 4:
tens = 40.0f;
break;
case 5:
tens = 50.0f;
break;
case 6:
tens = 60.0f;
break;
case 7:
tens = 70.0f;
break;
case 8:
tens = 80.0f;
break;
case 9:
tens = 90.0f;
break;
}
return tens;
}
private static float getHundreds(int c) {
float hundreds=0;
switch (c) {
case 1:
hundreds = 100.0f;
break;
case 2:
hundreds = 200.0f;
break;
case 3:
hundreds = 300.0f;
break;
case 4:
hundreds = 400.0f;
break;
case 5:
hundreds = 500.0f;
break;
case 6:
hundreds = 600.0f;
break;
case 7:
hundreds = 700.0f;
break;
case 8:
hundreds = 800.0f;
break;
case 9:
hundreds = 900.0f;
break;
}
return hundreds;
}
private static float getThousands(int c) {
float thous=0;
switch (c) {
case 1:
thous = 1000.0f;
break;
case 2:
thous = 2000.0f;
break;
case 3:
thous = 3000.0f;
break;
case 4:
thous = 4000.0f;
break;
case 5:
thous = 5000.0f;
break;
case 6:
thous = 6000.0f;
break;
case 7:
thous = 7000.0f;
break;
case 8:
thous = 8000.0f;
break;
case 9:
thous = 9000.0f;
break;
}
return thous;
}
}