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* $Id: PRTokeniser.java 3117 2008-01-31 05:53:22Z xlv $
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* Copyright 2001, 2002 by Paulo Soares.
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.mozilla.org/MPL/
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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* The Original Code is 'iText, a free JAVA-PDF library'.
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* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
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* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
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* All Rights Reserved.
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* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
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* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
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* Contributor(s): all the names of the contributors are added in the source code
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* Alternatively, the contents of this file may be used under the terms of the
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* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
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* provisions of LGPL are applicable instead of those above. If you wish to
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* allow use of your version of this file only under the terms of the LGPL
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* License and not to allow others to use your version of this file under
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* the MPL, indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by the LGPL.
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* If you do not delete the provisions above, a recipient may use your version
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* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the MPL as stated above or under the terms of the GNU
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* Library General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or any later version.
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
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* If you didn't download this code from the following link, you should check if
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* you aren't using an obsolete version:
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* http://www.lowagie.com/iText/
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package com.lowagie.text.pdf;
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import java.io.IOException;
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* @author Paulo Soares (psoares@consiste.pt)
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public class PRTokeniser {
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public static final int TK_NUMBER = 1;
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public static final int TK_STRING = 2;
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public static final int TK_NAME = 3;
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public static final int TK_COMMENT = 4;
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public static final int TK_START_ARRAY = 5;
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public static final int TK_END_ARRAY = 6;
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public static final int TK_START_DIC = 7;
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public static final int TK_END_DIC = 8;
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public static final int TK_REF = 9;
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public static final int TK_OTHER = 10;
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public static final boolean delims[] = {
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true, true, false, false, false, false, false, false, false, false,
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true, true, false, true, true, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, true, false, false, false, false, true, false,
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false, true, true, false, false, false, false, false, true, false,
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false, false, false, false, false, false, false, false, false, false,
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false, true, false, true, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, true, false, true, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false};
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static final String EMPTY = "";
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protected RandomAccessFileOrArray file;
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protected String stringValue;
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protected int reference;
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protected int generation;
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protected boolean hexString;
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public PRTokeniser(String filename) throws IOException {
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file = new RandomAccessFileOrArray(filename);
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public PRTokeniser(byte pdfIn[]) {
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file = new RandomAccessFileOrArray(pdfIn);
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public PRTokeniser(RandomAccessFileOrArray file) {
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public void seek(int pos) throws IOException {
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public int getFilePointer() throws IOException {
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return file.getFilePointer();
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public void close() throws IOException {
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public int length() throws IOException {
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return file.length();
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public int read() throws IOException {
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public RandomAccessFileOrArray getSafeFile() {
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return new RandomAccessFileOrArray(file);
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public RandomAccessFileOrArray getFile() {
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public String readString(int size) throws IOException {
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StringBuffer buf = new StringBuffer();
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while ((size--) > 0) {
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buf.append((char)ch);
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return buf.toString();
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public static final boolean isWhitespace(int ch) {
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return (ch == 0 || ch == 9 || ch == 10 || ch == 12 || ch == 13 || ch == 32);
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public static final boolean isDelimiter(int ch) {
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return (ch == '(' || ch == ')' || ch == '<' || ch == '>' || ch == '[' || ch == ']' || ch == '/' || ch == '%');
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public static final boolean isDelimiterWhitespace(int ch) {
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return delims[ch + 1];
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public int getTokenType() {
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public String getStringValue() {
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public int getReference() {
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public int getGeneration() {
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public void backOnePosition(int ch) {
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file.pushBack((byte)ch);
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public void throwError(String error) throws IOException {
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throw new IOException(error + " at file pointer " + file.getFilePointer());
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public char checkPdfHeader() throws IOException {
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file.setStartOffset(0);
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String str = readString(1024);
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int idx = str.indexOf("%PDF-");
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throw new IOException("PDF header signature not found.");
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file.setStartOffset(idx);
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return str.charAt(idx + 7);
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public void checkFdfHeader() throws IOException {
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file.setStartOffset(0);
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String str = readString(1024);
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int idx = str.indexOf("%FDF-1.2");
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throw new IOException("FDF header signature not found.");
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file.setStartOffset(idx);
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public int getStartxref() throws IOException {
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int size = Math.min(1024, file.length());
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int pos = file.length() - size;
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String str = readString(1024);
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int idx = str.lastIndexOf("startxref");
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throw new IOException("PDF startxref not found.");
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public static int getHex(int v) {
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if (v >= '0' && v <= '9')
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if (v >= 'A' && v <= 'F')
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if (v >= 'a' && v <= 'f')
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public void nextValidToken() throws IOException {
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while (nextToken()) {
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if (type == TK_COMMENT)
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if (type != TK_NUMBER)
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ptr = file.getFilePointer();
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if (type != TK_NUMBER) {
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if (type != TK_OTHER || !stringValue.equals("R")) {
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reference = Integer.parseInt(n1);
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generation = Integer.parseInt(n2);
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throwError("Unexpected end of file");
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public boolean nextToken() throws IOException {
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StringBuffer outBuf = null;
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} while (ch != -1 && isWhitespace(ch));
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type = TK_START_ARRAY;
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outBuf = new StringBuffer();
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ch = (getHex(file.read()) << 4) + getHex(file.read());
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outBuf.append((char)ch);
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throwError("'>' not expected");
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int v1 = file.read();
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outBuf = new StringBuffer();
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while (isWhitespace(v1))
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while (isWhitespace(v2))
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outBuf.append((char)ch);
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outBuf.append((char)ch);
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if (v1 < 0 || v2 < 0)
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throwError("Error reading string");
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} while (ch != -1 && ch != '\r' && ch != '\n');
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outBuf = new StringBuffer();
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else if (ch == ')') {
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else if (ch == '\\') {
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boolean lineBreak = false;
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if (ch < '0' || ch > '7') {
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int octal = ch - '0';
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if (ch < '0' || ch > '7') {
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octal = (octal << 3) + ch - '0';
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if (ch < '0' || ch > '7') {
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octal = (octal << 3) + ch - '0';
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else if (ch == '\r') {
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outBuf.append((char)ch);
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throwError("Error reading string");
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outBuf = new StringBuffer();
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if (ch == '-' || ch == '+' || ch == '.' || (ch >= '0' && ch <= '9')) {
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outBuf.append((char)ch);
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} while (ch != -1 && ((ch >= '0' && ch <= '9') || ch == '.'));
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outBuf.append((char)ch);
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} while (!delims[ch + 1]);
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stringValue = outBuf.toString();
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public int intValue() {
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return Integer.parseInt(stringValue);
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public boolean readLineSegment(byte input[]) throws IOException {
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int len = input.length;
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// ssteward, pdftk-1.10, 040922:
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// skip initial whitespace; added this because PdfReader.rebuildXref()
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// assumes that line provided by readLineSegment does not have init. whitespace;
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while ( isWhitespace( (c = read()) ) );
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while ( !eol && ptr < len ) {
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int cur = getFilePointer();
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if ((read()) != '\n') {
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input[ptr++] = (byte)c;
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// break loop? do it before we read() again
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if( eol || len <= ptr ) {
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switch (c = read()) {
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int cur = getFilePointer();
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if ((read()) != '\n') {
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if ((c == -1) && (ptr == 0)) {
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if (ptr + 2 <= len) {
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input[ptr++] = (byte)' ';
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input[ptr] = (byte)'X';
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public static int[] checkObjectStart(byte line[]) {
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PRTokeniser tk = new PRTokeniser(line);
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if (!tk.nextToken() || tk.getTokenType() != TK_NUMBER)
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if (!tk.nextToken() || tk.getTokenType() != TK_NUMBER)
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if (!tk.getStringValue().equals("obj"))
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return new int[]{num, gen};
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catch (Exception ioe) {
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public boolean isHexString() {
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return this.hexString;
added
removed
core/com/lowagie/text/pdf/PRTokeniser.java
