org.jpedal.fonts.Dict Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 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
*
* ---------------
* Dict.java
* ---------------
*/
package org.jpedal.fonts;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class Dict {
private int pos = 0;
private final byte[] data;
public Map entries = new LinkedHashMap();
public Dict privateDict = null;
public int[] charStringIndex = null;
public int ascent = 800;
public int descent = -200;
public CIDCharset charset = null;
public CIDEncoding encoding = null;
Dict(byte[] data) {
List operands = new ArrayList();
this.data = data;
int end = data.length;
while (pos < end) {
int b = data[pos] & 0xff;
if (b <= 21) {
if (b == 12) {
b = (b << 8) | (data[++pos] & 0xff);
}
Number[] operandsArr = new Number[operands.size()];
operandsArr = operands.toArray(operandsArr);
entries.put(b, operandsArr);
operands = new ArrayList();
++pos;
} else {
operands.add(parseOperand());
}
}
}
private Number parseOperand() {
int value = data[pos++] & 0xff;
if (value == 30) {
return parseFloatOperand();
} else if (value == 28) {
value = data[pos++] & 0xff;
value = ((value << 24) | ((data[pos++] & 0xff) << 16)) >> 16;
return value;
} else if (value == 29) {
value = data[pos++] & 0xff;
value = (value << 8) | (data[pos++] & 0xff);
value = (value << 8) | (data[pos++] & 0xff);
value = (value << 8) | (data[pos++] & 0xff);
return value;
} else if (value >= 32 && value <= 246) {
return value - 139;
} else if (value >= 247 && value <= 250) {
return ((value - 247) * 256) + (data[pos++] & 0xff) + 108;
} else if (value >= 251 && value <= 254) {
return -((value - 251) * 256) - (data[pos++] & 0xff) - 108;
}
return null;
}
private float parseFloatOperand() {
StringBuilder str = new StringBuilder();
int eof = 15;
String[] lookup = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", ".", "E", "E-", null, "-"};
int length = data.length;
while (pos < length) {
int b = data[pos++] & 0xff;
int b1 = b >> 4;
int b2 = b & 15;
if (b1 == eof) {
break;
}
str.append(lookup[b1]);
if (b2 == eof) {
break;
}
str.append(lookup[b2]);
}
return Float.parseFloat(str.toString());
}
}