diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PRTokeniser.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PRTokeniser.java | 585 |
1 files changed, 0 insertions, 585 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PRTokeniser.java b/src/main/java/com/lowagie/text/pdf/PRTokeniser.java deleted file mode 100644 index 9aaa881..0000000 --- a/src/main/java/com/lowagie/text/pdf/PRTokeniser.java +++ /dev/null @@ -1,585 +0,0 @@ -/*
- * $Id: PRTokeniser.java,v 1.51 2005/12/22 18:29:21 psoares33 Exp $
- *
- * Copyright 2001, 2002 by Paulo Soares.
- *
- * The contents of this file are subject to the Mozilla Public License Version 1.1
- * (the "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the License.
- *
- * The Original Code is 'iText, a free JAVA-PDF library'.
- *
- * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
- * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
- * All Rights Reserved.
- * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
- * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
- *
- * Contributor(s): all the names of the contributors are added in the source code
- * where applicable.
- *
- * Alternatively, the contents of this file may be used under the terms of the
- * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
- * provisions of LGPL are applicable instead of those above. If you wish to
- * allow use of your version of this file only under the terms of the LGPL
- * License and not to allow others to use your version of this file under
- * the MPL, indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by the LGPL.
- * If you do not delete the provisions above, a recipient may use your version
- * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the MPL as stated above or under the terms of the GNU
- * Library General Public License as published by the Free Software Foundation;
- * either version 2 of the License, or 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 Library general Public License for more
- * details.
- *
- * If you didn't download this code from the following link, you should check if
- * you aren't using an obsolete version:
- * http://www.lowagie.com/iText/
- */
-
-package com.lowagie.text.pdf;
-
-import java.io.*;
-/**
- *
- * @author Paulo Soares (psoares@consiste.pt)
- */
-public class PRTokeniser {
-
- public static final int TK_NUMBER = 1;
- public static final int TK_STRING = 2;
- public static final int TK_NAME = 3;
- public static final int TK_COMMENT = 4;
- public static final int TK_START_ARRAY = 5;
- public static final int TK_END_ARRAY = 6;
- public static final int TK_START_DIC = 7;
- public static final int TK_END_DIC = 8;
- public static final int TK_REF = 9;
- public static final int TK_OTHER = 10;
- public static final boolean delims[] = {
- true, true, false, false, false, false, false, false, false, false,
- true, true, false, true, true, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, true, false, false, false, false, true, false,
- false, true, true, false, false, false, false, false, true, false,
- false, false, false, false, false, false, false, false, false, false,
- false, true, false, true, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, true, false, true, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false, false, false, false,
- false, false, false, false, false, false, false};
-
- static final String EMPTY = "";
-
-
- protected RandomAccessFileOrArray file;
- protected int type;
- protected String stringValue;
- protected int reference;
- protected int generation;
- protected boolean hexString;
-
- private static final int LINE_SEGMENT_SIZE = 256;
-
- public PRTokeniser(String filename) throws IOException {
- file = new RandomAccessFileOrArray(filename);
- }
-
- public PRTokeniser(byte pdfIn[]) {
- file = new RandomAccessFileOrArray(pdfIn);
- }
-
- public PRTokeniser(RandomAccessFileOrArray file) {
- this.file = file;
- }
-
- public void seek(int pos) throws IOException {
- file.seek(pos);
- }
-
- public int getFilePointer() throws IOException {
- return file.getFilePointer();
- }
-
- public void close() throws IOException {
- file.close();
- }
-
- public int length() throws IOException {
- return file.length();
- }
-
- public int read() throws IOException {
- return file.read();
- }
-
- public RandomAccessFileOrArray getSafeFile() {
- return new RandomAccessFileOrArray(file);
- }
-
- public RandomAccessFileOrArray getFile() {
- return file;
- }
-
- public String readString(int size) throws IOException {
- StringBuffer buf = new StringBuffer();
- int ch;
- while ((size--) > 0) {
- ch = file.read();
- if (ch == -1)
- break;
- buf.append((char)ch);
- }
- return buf.toString();
- }
-
- public static final boolean isWhitespace(int ch) {
- return (ch == 0 || ch == 9 || ch == 10 || ch == 12 || ch == 13 || ch == 32);
- }
-
- public static final boolean isDelimiter(int ch) {
- return (ch == '(' || ch == ')' || ch == '<' || ch == '>' || ch == '[' || ch == ']' || ch == '/' || ch == '%');
- }
-
- public static final boolean isDelimiterWhitespace(int ch) {
- return delims[ch + 1];
- }
-
- public int getTokenType() {
- return type;
- }
-
- public String getStringValue() {
- return stringValue;
- }
-
- public int getReference() {
- return reference;
- }
-
- public int getGeneration() {
- return generation;
- }
-
- public void backOnePosition(int ch) throws IOException {
- if (ch != -1)
- file.pushBack((byte)ch);
- }
-
- public void throwError(String error) throws IOException {
- throw new IOException(error + " at file pointer " + file.getFilePointer());
- }
-
- public char checkPdfHeader() throws IOException {
- file.setStartOffset(0);
- String str = readString(1024);
- int idx = str.indexOf("%PDF-1.");
- if (idx < 0)
- throw new IOException("PDF header signature not found.");
- file.setStartOffset(idx);
- return str.charAt(idx + 7);
- }
-
- public void checkFdfHeader() throws IOException {
- file.setStartOffset(0);
- String str = readString(1024);
- int idx = str.indexOf("%FDF-1.2");
- if (idx < 0)
- throw new IOException("FDF header signature not found.");
- file.setStartOffset(idx);
- }
-
- public int getStartxref() throws IOException {
- int size = Math.min(1024, file.length());
- int pos = file.length() - size;
- file.seek(pos);
- String str = readString(1024);
- int idx = str.lastIndexOf("startxref");
- if (idx < 0)
- throw new IOException("PDF startxref not found.");
- return pos + idx;
- }
-
- public static int getHex(int v) {
- if (v >= '0' && v <= '9')
- return v - '0';
- if (v >= 'A' && v <= 'F')
- return v - 'A' + 10;
- if (v >= 'a' && v <= 'f')
- return v - 'a' + 10;
- return -1;
- }
-
- public void nextValidToken() throws IOException {
- int level = 0;
- String n1 = null;
- String n2 = null;
- int ptr = 0;
- while (nextToken()) {
- if (type == TK_COMMENT)
- continue;
- switch (level) {
- case 0:
- {
- if (type != TK_NUMBER)
- return;
- ptr = file.getFilePointer();
- n1 = stringValue;
- ++level;
- break;
- }
- case 1:
- {
- if (type != TK_NUMBER) {
- file.seek(ptr);
- type = TK_NUMBER;
- stringValue = n1;
- return;
- }
- n2 = stringValue;
- ++level;
- break;
- }
- default:
- {
- if (type != TK_OTHER || !stringValue.equals("R")) {
- file.seek(ptr);
- type = TK_NUMBER;
- stringValue = n1;
- return;
- }
- type = TK_REF;
- reference = Integer.parseInt(n1);
- generation = Integer.parseInt(n2);
- return;
- }
- }
- }
- throwError("Unexpected end of file");
- }
-
- public boolean nextToken() throws IOException {
- StringBuffer outBuf = null;
- stringValue = EMPTY;
- int ch = 0;
- do {
- ch = file.read();
- } while (ch != -1 && isWhitespace(ch));
- if (ch == -1)
- return false;
- switch (ch) {
- case '[':
- type = TK_START_ARRAY;
- break;
- case ']':
- type = TK_END_ARRAY;
- break;
- case '/':
- {
- outBuf = new StringBuffer();
- type = TK_NAME;
- while (true) {
- ch = file.read();
- if (delims[ch + 1])
- break;
- if (ch == '#') {
- ch = (getHex(file.read()) << 4) + getHex(file.read());
- }
- outBuf.append((char)ch);
- }
- backOnePosition(ch);
- break;
- }
- case '>':
- ch = file.read();
- if (ch != '>')
- throwError("'>' not expected");
- type = TK_END_DIC;
- break;
- case '<':
- {
- int v1 = file.read();
- if (v1 == '<') {
- type = TK_START_DIC;
- break;
- }
- outBuf = new StringBuffer();
- type = TK_STRING;
- hexString = true;
- int v2 = 0;
- while (true) {
- while (isWhitespace(v1))
- v1 = file.read();
- if (v1 == '>')
- break;
- v1 = getHex(v1);
- if (v1 < 0)
- break;
- v2 = file.read();
- while (isWhitespace(v2))
- v2 = file.read();
- if (v2 == '>') {
- ch = v1 << 4;
- outBuf.append((char)ch);
- break;
- }
- v2 = getHex(v2);
- if (v2 < 0)
- break;
- ch = (v1 << 4) + v2;
- outBuf.append((char)ch);
- v1 = file.read();
- }
- if (v1 < 0 || v2 < 0)
- throwError("Error reading string");
- break;
- }
- case '%':
- type = TK_COMMENT;
- do {
- ch = file.read();
- } while (ch != -1 && ch != '\r' && ch != '\n');
- break;
- case '(':
- {
- outBuf = new StringBuffer();
- type = TK_STRING;
- hexString = false;
- int nesting = 0;
- while (true) {
- ch = file.read();
- if (ch == -1)
- break;
- if (ch == '(') {
- ++nesting;
- }
- else if (ch == ')') {
- --nesting;
- }
- else if (ch == '\\') {
- boolean lineBreak = false;
- ch = file.read();
- switch (ch) {
- case 'n':
- ch = '\n';
- break;
- case 'r':
- ch = '\r';
- break;
- case 't':
- ch = '\t';
- break;
- case 'b':
- ch = '\b';
- break;
- case 'f':
- ch = '\f';
- break;
- case '(':
- case ')':
- case '\\':
- break;
- case '\r':
- lineBreak = true;
- ch = file.read();
- if (ch != '\n')
- backOnePosition(ch);
- break;
- case '\n':
- lineBreak = true;
- break;
- default:
- {
- if (ch < '0' || ch > '7') {
- break;
- }
- int octal = ch - '0';
- ch = file.read();
- if (ch < '0' || ch > '7') {
- backOnePosition(ch);
- ch = octal;
- break;
- }
- octal = (octal << 3) + ch - '0';
- ch = file.read();
- if (ch < '0' || ch > '7') {
- backOnePosition(ch);
- ch = octal;
- break;
- }
- octal = (octal << 3) + ch - '0';
- ch = octal & 0xff;
- break;
- }
- }
- if (lineBreak)
- continue;
- if (ch < 0)
- break;
- }
- else if (ch == '\r') {
- ch = file.read();
- if (ch < 0)
- break;
- if (ch != '\n') {
- backOnePosition(ch);
- ch = '\n';
- }
- }
- if (nesting == -1)
- break;
- outBuf.append((char)ch);
- }
- if (ch == -1)
- throwError("Error reading string");
- break;
- }
- default:
- {
- outBuf = new StringBuffer();
- if (ch == '-' || ch == '+' || ch == '.' || (ch >= '0' && ch <= '9')) {
- type = TK_NUMBER;
- do {
- outBuf.append((char)ch);
- ch = file.read();
- } while (ch != -1 && ((ch >= '0' && ch <= '9') || ch == '.'));
- }
- else {
- type = TK_OTHER;
- do {
- outBuf.append((char)ch);
- ch = file.read();
- } while (!delims[ch + 1]);
- }
- backOnePosition(ch);
- break;
- }
- }
- if (outBuf != null)
- stringValue = outBuf.toString();
- return true;
- }
-
- public int intValue() {
- return Integer.parseInt(stringValue);
- }
-
- public boolean readLineSegment(byte input[]) throws IOException {
- int c = -1;
- boolean eol = false;
- int ptr = 0;
- int len = input.length;
- // ssteward, pdftk-1.10, 040922:
- // skip initial whitespace; added this because PdfReader.rebuildXref()
- // assumes that line provided by readLineSegment does not have init. whitespace;
- if ( ptr < len ) {
- while ( isWhitespace( (c = read()) ) );
- }
- while ( !eol && ptr < len ) {
- switch (c) {
- case -1:
- case '\n':
- eol = true;
- break;
- case '\r':
- eol = true;
- int cur = getFilePointer();
- if ((read()) != '\n') {
- seek(cur);
- }
- break;
- default:
- input[ptr++] = (byte)c;
- break;
- }
-
- // break loop? do it before we read() again
- if( eol || len <= ptr ) {
- break;
- }
- else {
- c = read();
- }
- }
- if (ptr >= len) {
- eol = false;
- while (!eol) {
- switch (c = read()) {
- case -1:
- case '\n':
- eol = true;
- break;
- case '\r':
- eol = true;
- int cur = getFilePointer();
- if ((read()) != '\n') {
- seek(cur);
- }
- break;
- }
- }
- }
-
- if ((c == -1) && (ptr == 0)) {
- return false;
- }
- if (ptr + 2 <= len) {
- input[ptr++] = (byte)' ';
- input[ptr] = (byte)'X';
- }
- return true;
- }
-
- public static int[] checkObjectStart(byte line[]) {
- try {
- PRTokeniser tk = new PRTokeniser(line);
- int num = 0;
- int gen = 0;
- if (!tk.nextToken() || tk.getTokenType() != TK_NUMBER)
- return null;
- num = tk.intValue();
- if (!tk.nextToken() || tk.getTokenType() != TK_NUMBER)
- return null;
- gen = tk.intValue();
- if (!tk.nextToken())
- return null;
- if (!tk.getStringValue().equals("obj"))
- return null;
- return new int[]{num, gen};
- }
- catch (Exception ioe) {
- // empty on purpose
- }
- return null;
- }
-
- public boolean isHexString() {
- return this.hexString;
- }
-
-}
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