org.jpedal.io.ObjectUtils 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 1997-2015 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
*
* ---------------
* ObjectUtils.java
* ---------------
*/
package org.jpedal.io;
import org.jpedal.io.types.ArrayUtils;
import org.jpedal.objects.raw.DecodeParmsObject;
import org.jpedal.objects.raw.PdfDictionary;
import org.jpedal.objects.raw.PdfObject;
/**
* general static methods
*/
public class ObjectUtils {
public static byte[] checkEndObject(byte[] array) {
long objStart=-1,lastEndStream=-1;
int ObjStartCount = 0;
//check if mising endobj
for (int i = 0; i < array.length - 8; i++) {
//track endstream and first or second obj
if ((ObjStartCount < 2) && (array[i] == 32) && (array[i + 1] == 111) &&
(array[i + 2] == 98) && (array[i + 3] == 106)) {
ObjStartCount++;
objStart = i;
}
if ((ObjStartCount < 2) && (array[i] == 101) && (array[i + 1] == 110) &&
(array[i + 2] == 100) && (array[i + 3] == 115) &&
(array[i + 4] == 116) && (array[i + 5] == 114) &&
(array[i + 6] == 101) && (array[i + 7] == 97) && (array[i + 8] == 109)) {
lastEndStream = i + 9;
}
}
if ((lastEndStream > 0) && (objStart > lastEndStream)) {
final byte[] newArray = new byte[(int) lastEndStream];
System.arraycopy(array, 0, newArray, 0, (int) lastEndStream);
array = newArray;
}
return array;
}
public static byte[] readRawValue(final int j, final byte[] data, final int start) {
byte[] newString;
final int stringLength = j - start;
if (stringLength < 1) {
return new byte[0];
}
newString = new byte[stringLength];
System.arraycopy(data, start, newString, 0, stringLength);
return newString;
}
public static byte[] readEscapedValue(final int j, final byte[] data, final int start, final boolean keepReturns) {
//see if escape values
boolean escapedValues=false;
for(int aa=start;aa47 && nextByte<58){ //octal
final StringBuilder octal=new StringBuilder(3);
boolean notOctal=false;
for(int ii=0;ii<3;ii++){
if(data[aa]=='\\' || data[aa]==')' || data[aa]<'0' || data[aa]>'9') //allow for less than 3 values
{
ii = 3;
} else{
octal.append((char)data[aa]);
//catch for odd values
if(data[aa]>'7') {
notOctal = true;
}
aa++;
}
}
//move back 1
aa--;
//isOctal=true;
if(notOctal) {
newString[jj] = (byte) Integer.parseInt(octal.toString());
} else {
newString[jj] = (byte) Integer.parseInt(octal.toString(), 8);
}
}else if(!keepReturns && (nextByte==13 || nextByte==10)){ //ignore bum data
jj--;
}else {
newString[jj] = nextByte;
}
jj++;
}else if(!keepReturns && (data[aa]==13 || data[aa]==10)){ //convert returns to spaces
newString[jj]=32;
jj++;
}else{
newString[jj]=data[aa];
jj++;
}
}
//now resize
final byte[] rawString=newString;
newString=new byte[jj];
System.arraycopy(rawString, 0, newString, 0, jj);
return newString;
}
/**
* ensure all objects resolved
* @param pdfObject
* @param objReader
* @return
*/
public static PdfObject[] setupDecodeParms(final PdfObject pdfObject, final PdfFileReader objReader) {
final PdfObject[] decodeParmsValues;
final Object[] DecodeParmsArray = pdfObject.getObjectArray(PdfDictionary.DecodeParms);
//if specific DecodeParms for each filter, set othereise use global
if(DecodeParmsArray!=null){
final int count=DecodeParmsArray.length;
decodeParmsValues=new PdfObject[count];
for(int i=0;i0){
final int newLen=len-returnCount;
int jj=0;
final byte[] oldValue=newValues;
newValues=new byte[newLen];
for(int aa=0;aa' && raw[jj+1]=='>'){
levels--;
//allow for >>>>
if(raw[jj+2]=='>') {
jj++;
}
}
jj++;
if(levels==0 || jj>=count) {
break;
}
}
i=jj;
jj=count;
}else if(raw[jj]=='/'){
jj=count;
}else if(raw[jj]=='>' && raw[jj+1]=='>'){
i=jj-1;
jj=count;
}else if(raw[jj]=='('){
while(jj-1 && raw[j]=='\\'){
j--;
escapedFound++;
}
//System.out.println("escapedFound="+escapedFound+" "+(escapedFound & 2 ));
return (escapedFound & 1) == 1;
}
public static int setDirectValue(final PdfObject pdfObject, int i, final byte[] raw, final int PDFkeyInt) {
final int keyStart;
i++;
keyStart = i;
while (i < raw.length && raw[i] != 32 && raw[i] != 10 && raw[i] != 13) {
i++;
}
//store value
pdfObject.setConstant(PDFkeyInt, keyStart, i - keyStart, raw);
return i;
}
/**
* used to debug object reading code
* @param pdfObject
* @param i
* @param length
* @param raw
* @param padding
*/
static void showData(final PdfObject pdfObject, final int i, final int length, final byte[] raw, final String padding) {
System.out.println("\n\n"+ padding +" ------------readDictionaryAsObject ref="+ pdfObject.getObjectRefAsString() +" into "+pdfObject+"-----------------\ni="+i+"\nData=>>>>");
System.out.print(padding);
for(int jj=i;jj5 && raw[jj-5]=='s' && raw[jj-4]=='t' && raw[jj-3]=='r' && raw[jj-2]=='e' && raw[jj-1]=='a' &&raw[jj]=='m') {
jj = length;
}
if(jj>2 && raw[jj-2]=='B' && raw[jj-1]=='D' &&raw[jj]=='C') {
jj = length;
}
}
System.out.println(padding +"\n<<<<-----------------------------------------------------\n");
}
public static String showMixedValuesAsString(final Object[] objectValues, String values) {
if(objectValues==null) {
return "null";
}
values += '[';
final int count=objectValues.length;
for(int jj=0;jj1) {
values += " , ";
}
}else{
values = showMixedValuesAsString((Object[])objectValues[jj], values)+ ']';
if(count-jj>1) {
values += " ,";
}
}
}
return values;
}
}
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