org.jpedal.io.types.FloatValue 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


 *
 * ---------------
 * FloatValue.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.NumberUtils;

/**
 *
 */
public class FloatValue {


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

        //roll on
        i++;

        i = StreamReaderUtils.skipSpacesOrOtherCharacter(raw, i, 47);

        int keyStart = i;
        i = StreamReaderUtils.skipToEndOfRef(raw, i);

        //actual value or first part of ref
        float number = NumberUtils.parseFloat(keyStart, i, raw);

        //roll onto next nonspace char and see if number
        int jj = i;
        jj = StreamReaderUtils.skipSpaces(raw, jj);

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

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

            
            /*
             * get generation number
             */
            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((int) number, generation), (int) 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");
                }

                return raw.length;
            }

            //lose obj at start
            int j = 3;
            while (data[j - 1] != 106 && data[j - 2] != 98 && data[j - 3] != 111) {
                j++;
            }

            j = StreamReaderUtils.skipSpaces(data, j);

            int count = j;

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

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

        }

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

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

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

}