org.jpedal.io.types.NumberValue 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


 *
 * ---------------
 * NumberValue.java
 * ---------------
 */
package org.jpedal.io.types;

import static org.jpedal.io.ObjectDecoder.debugFastCode;
import static org.jpedal.io.ObjectDecoder.padding;

import org.jpedal.io.PdfFileReader;
import org.jpedal.objects.raw.PdfObject;
import org.jpedal.utils.LogWriter;
import org.jpedal.utils.NumberUtils;

/**
 *
 */
public class NumberValue {


    public static int setNumberValue(final PdfObject pdfObject, int i, final byte[] raw, final int PDFkeyInt, final PdfFileReader objectReader) {

        final int keyStart = i;
        final int rawLength = raw.length;

        //move cursor to end of text
        while (raw[i] != 10 && raw[i] != 13 && raw[i] != 32 && raw[i] != 47 && raw[i] != 60 && raw[i] != 62 && raw[i] != '(' && raw[i] != '.') {
            i++;
        }

        //actual value or first part of ref
        final int number = NumberUtils.parseInt(keyStart, i, raw);

        final int jj = StreamReaderUtils.skipSpaces(raw, i);

        //check its not a ref (assumes it XX 0 R)
        if (raw[jj] >= 48 && raw[jj] <= 57) { //if next char is number 0-9 it may be a ref

            //move cursor to end of number
            int aa = StreamReaderUtils.skipToEndOfRef(raw, jj);

            //move cursor to start of text
            aa = StreamReaderUtils.skipSpacesOrOtherCharacter(raw, aa, 47);

            final boolean isRef = aa < rawLength && raw[aa] == 'R';

            if (isRef) {
                return readNumberFromIndirectObj(PDFkeyInt, pdfObject, i, raw, objectReader, rawLength, number);
            }
        }

        //store value
        pdfObject.setIntNumber(PDFkeyInt, number);

        if (debugFastCode) {
            System.out.println(padding + "set numberValue=" + number);
        }

        // move back so loop works
        return i - 1;
    }

    static int readNumberFromIndirectObj(final int PDFkeyInt, final PdfObject pdfObject, int i, final byte[] raw, final PdfFileReader objectReader, final int rawLength, int number) {

        final int keyStart;
        i = StreamReaderUtils.skipSpaces(raw, i);

        keyStart = i;
        //move cursor to end of reference
        i = StreamReaderUtils.skipToEndOfRef(raw, i);

        final int generation = NumberUtils.parseInt(keyStart, i, raw);

        //move cursor to start of R
        while (raw[i] == 10 || raw[i] == 13 || raw[i] == 32 || raw[i] == 47 || raw[i] == 60) {
            i++;
        }

        if (raw[i] != 82) { //we are expecting R to end ref
            throw new RuntimeException("3. Unexpected value in file - please send to IDRsolutions for analysis");
        }

        //read the Dictionary data
        final byte[] data = objectReader.readObjectAsByteArray(pdfObject, objectReader.isCompressed(number, generation), number, generation);

        //allow for data in Linear object not yet loaded
        if (data == null) {
            pdfObject.setFullyResolved(false);

            if (debugFastCode) {
                System.out.println(padding + "Data not yet loaded");
            }

            LogWriter.writeLog("[Linearized] " + pdfObject.getObjectRefAsString() + " not yet available (8)");

            return rawLength;
        }

        //lose obj at start
        int j = 0;
        final int len = data.length;

        //allow for example where start <<
        if (len > 1 && data[0] == '<' && data[1] == '<') {
        } else if (len <= 3) { //fix for short indirect value /K 30 0 R where 30 0R is -1 ie (11dec/Real Estate Tax Bill 2011.pdf)
        } else {
            j = 3;
            if (len > 3) { //allow for small values (ie Rotate object pointing to value 0)
                while (data[j - 1] != 106 && data[j - 2] != 98 && data[j - 3] != 111) {
                    j++;

                    if (j == len) {
                        j = 0;
                        break;
                    }
                }
            }
        }

        //skip any spaces after
        if (len > 1) { //allow for small values (ie Rotate object pointing to value 0)
            j = StreamReaderUtils.skipSpaces(data, j);
        }

        int count = j;

        //skip any spaces at end
        while (count < len && data[count] != 9 && data[count] != 10 && data[count] != 13 && data[count] != 32)// || data[j]==47 || data[j]==60)
        {
            count++;
        }

        number = NumberUtils.parseInt(j, count, data);

        pdfObject.setIntNumber(PDFkeyInt, number);

        if (debugFastCode) {
            System.out.println(padding + "set numberValue=" + number); //+" in "+pdfObject);
        }

        // move back so loop works
        return i - 1;
    }
}