/** read table of values */
public int readXRefs(
int current,
final byte[] Bytes,
final int endTable,
int i,
final long eof,
final RandomAccessBuffer pdf_datafile) {
char flag;
int id, tokenCount, generation, lineLen, startLine, endLine;
boolean skipNext = false;
boolean isFirstValue = true;
final int[] breaks = new int[5];
final int[] starts = new int[5];
// loop to read all references
while (i < endTable) { // exit end at trailer
startLine = i;
endLine = -1;
/** read line locations */
// move to start of value ignoring spaces or returns
while (Bytes[i] != 10 && Bytes[i] != 13) {
// scan for %
if ((endLine == -1) && (Bytes[i] == 37)) {
endLine = i - 1;
}
i++;
}
// set end if no comment
if (endLine == -1) {
endLine = i - 1;
}
// strip any spaces
while (Bytes[startLine] == 32) {
startLine++;
}
// strip any spaces
while (Bytes[endLine] == 32) {
endLine--;
}
i++;
/** decode the line */
tokenCount = 0;
lineLen = endLine - startLine + 1;
if (lineLen > 0) {
// decide if line is a section header or value
// first count tokens
int lastChar = 1, currentChar;
for (int j = 1; j < lineLen; j++) {
currentChar = Bytes[startLine + j];
if ((currentChar == 32) && (lastChar != 32)) {
breaks[tokenCount] = j;
tokenCount++;
} else if ((currentChar != 32) && (lastChar == 32)) {
starts[tokenCount] = j;
}
lastChar = currentChar;
}
// update numbers so loops work
breaks[tokenCount] = lineLen;
tokenCount++;
if (tokenCount == 1) { // fix for first 2 values on separate lines
if (skipNext) {
skipNext = false;
} else {
current = NumberUtils.parseInt(startLine, startLine + breaks[0], Bytes);
skipNext = true;
}
} else if (tokenCount == 2) {
current = NumberUtils.parseInt(startLine, startLine + breaks[0], Bytes);
} else {
id = NumberUtils.parseInt(startLine, startLine + breaks[0], Bytes);
generation = NumberUtils.parseInt(startLine + starts[1], startLine + breaks[1], Bytes);
flag = (char) Bytes[startLine + starts[2]];
if ((flag == 'n')) { // only add objects in use
/** assume not valid and test to see if valid */
boolean isValid = false;
// get bytes
int bufSize = 20;
// adjust buffer if less than 1024 bytes left in file
if (id + bufSize > eof) {
bufSize = (int) (eof - id);
}
if (bufSize > 0) {
/** get bytes into buffer */
final byte[] buffer = getBytes(id, bufSize, pdf_datafile);
// look for space o b j
for (int ii = 4; ii < bufSize; ii++) {
if ((buffer[ii - 3] == 32 || buffer[ii - 3] == 10)
&& (buffer[ii - 2] == 111)
&& (buffer[ii - 1] == 98)
&& (buffer[ii] == 106)) {
isValid = true;
ii = bufSize;
}
}
// check number
if (isValid && isFirstValue) {
isFirstValue = false;
if (buffer[0] == 48 && buffer[1] != 48 && current == 1) {
current = 0;
} else if (buffer[0] == 49 && buffer[1] == 32) {
current = 1;
}
}
if (isValid) {
storeObjectOffset(current, id, generation, false, false);
xref.addElement(id);
} else if (LogWriter.isRunningFromIDE) {
LogWriter.writeLog(current + " " + id + " is bum reference");
}
}
current++; // update our pointer
} else if (flag == 'f') {
current++; // update our pointer
}
}
}
}
return current;
}
/** read reference table from file so we can locate objects in pdf file and read the trailers */
private PdfObject readLegacyReferenceTable(
PdfObject rootObj, int pointer, final int eof, final PdfFileReader currentPdfFile)
throws PdfException {
int endTable, current = 0; // current object number
byte[] Bytes;
int bufSize = 1024;
/** read and decode 1 or more trailers */
while (true) {
try {
// allow for pointer outside file
Bytes = Trailer.readTrailer(bufSize, pointer, eof, pdf_datafile);
} catch (final Exception e) {
try {
closeFile();
} catch (final IOException e1) {
if (LogWriter.isOutput()) {
LogWriter.writeLog("Exception " + e + " closing file " + e1);
}
}
throw new PdfException("Exception " + e + " reading trailer");
}
if (Bytes == null) // safety catch
{
break;
}
/** get trailer */
int i = 0;
final int maxLen = Bytes.length;
// for(int a=0;a<100;a++)
// System.out.println((char)Bytes[i+a]);
while (i < maxLen) { // look for trailer keyword
if (Bytes[i] == 116
&& Bytes[i + 1] == 114
&& Bytes[i + 2] == 97
&& Bytes[i + 3] == 105
&& Bytes[i + 4] == 108
&& Bytes[i + 5] == 101
&& Bytes[i + 6] == 114) {
break;
}
i++;
}
// save endtable position for later
endTable = i;
if (i == Bytes.length) {
break;
}
// move to beyond <<
while (Bytes[i] != 60 && Bytes[i - 1] != 60) {
i++;
}
i++;
final PdfObject pdfObject = new CompressedObject("1 0 R");
Dictionary.readDictionary(pdfObject, i, Bytes, -1, true, currentPdfFile, false);
// move to beyond >>
int level = 0;
while (true) {
if (Bytes[i] == 60 && Bytes[i - 1] == 60) {
level++;
i++;
} else if (Bytes[i] == '[') {
i++;
while (Bytes[i] != ']') {
i++;
if (i == Bytes.length) {
break;
}
}
} else if (Bytes[i] == 62 && Bytes[i - 1] == 62) {
level--;
i++;
}
if (level == 0) {
break;
}
i++;
}
// handle optional XRefStm
final int XRefStm = pdfObject.getInt(PdfDictionary.XRefStm);
if (XRefStm != -1) {
pointer = XRefStm;
} else { // usual way
boolean hasRef = true;
/** handle spaces and comments */
while (Bytes[i] == 10 || Bytes[i] == 13) {
i++;
}
while (Bytes[i] == '%') {
while (Bytes[i] != 10) {
i++;
}
i++;
}
/* fix for /Users/markee/Downloads/oneiderapartnerbrochure_web_1371798737.pdf
/**/
// look for xref as end of startref
while (Bytes[i] != 116
&& Bytes[i + 1] != 120
&& Bytes[i + 2] != 114
&& Bytes[i + 3] != 101
&& Bytes[i + 4] != 102) {
if (Bytes[i] == 'o' && Bytes[i + 1] == 'b' && Bytes[i + 2] == 'j') {
hasRef = false;
break;
}
i++;
}
if (hasRef) {
i += 8;
// move to start of value ignoring spaces or returns
while ((i < maxLen) && (Bytes[i] == 10 || Bytes[i] == 32 || Bytes[i] == 13)) {
i++;
}
final int s = i;
// allow for characters between xref and startref
while (i < maxLen && Bytes[i] != 10 && Bytes[i] != 32 && Bytes[i] != 13) {
i++;
}
/** convert xref to string to get pointer */
if (s != i) {
pointer = NumberUtils.parseInt(s, i, Bytes);
}
}
}
i = 0;
// allow for bum data at start
while (Bytes[i] == 13 || Bytes[i] == 10 || Bytes[i] == 9) {
i++;
}
if (pointer == -1) {
if (LogWriter.isOutput()) {
LogWriter.writeLog("No startRef");
}
/** now read the objects for the trailers */
} else if (Bytes[i] == 120
&& Bytes[i + 1] == 114
&& Bytes[i + 2] == 101
&& Bytes[i + 3] == 102) { // make sure starts xref
i = 5;
// move to start of value ignoring spaces or returns
while (Bytes[i] == 10 || Bytes[i] == 32 || Bytes[i] == 13) {
i++;
}
current = offset.readXRefs(current, Bytes, endTable, i, eof, pdf_datafile);
/**
* now process trailer values - only first set of table values for root, encryption and info
*/
if (rootObj == null) {
rootObj = pdfObject.getDictionary(PdfDictionary.Root);
encryptObj = pdfObject.getDictionary(PdfDictionary.Encrypt);
if (encryptObj != null) {
final byte[][] IDs = pdfObject.getStringArray(PdfDictionary.ID);
if (IDs != null && this.ID == null) {
// only the first encountered ID should be used as a fileID for decryption
this.ID = IDs[0];
}
}
infoObject = pdfObject.getDictionary(PdfDictionary.Info);
}
// make sure first values used if several tables and code for prev
pointer = pdfObject.getInt(PdfDictionary.Prev);
// see if other trailers
if (pointer != -1 && pointer < this.eof) {
// reset values for loop
bufSize = 1024;
// track ref table so we can work out object length
offset.addXref(pointer);
} else // reset if fails second test above
{
pointer = -1;
}
} else {
pointer = -1;
// needs to be read to pick up potential /Pages value
//noinspection ObjectAllocationInLoop
rootObj = new PageObject(BrokenRefTable.findOffsets(pdf_datafile, offset));
currentPdfFile.readObject(rootObj);
offset.setRefTableInvalid(true);
}
if (pointer == -1) {
break;
}
}
if (encryptObj == null
&& rootObj != null) { // manual check for broken file (ignore if Encrypted)
int type = -1;
int status = rootObj.getStatus();
byte[] data = rootObj.getUnresolvedData();
try {
final ObjectDecoder objectDecoder = new ObjectDecoder(currentPdfFile);
objectDecoder.checkResolved(rootObj);
type = rootObj.getParameterConstant(PdfDictionary.Type);
} catch (Exception e) { // we need to ignore so just catch, put back as was and log
rootObj.setStatus(status);
rootObj.setUnresolvedData(data, status);
if (LogWriter.isOutput()) {
LogWriter.writeLog("[PDF] Exception reading type on root object " + e);
}
}
// something gone wrong so manually index
if (type == PdfDictionary.Font) { // see 21153 - ref table in wrong order
rootObj = null; // /will reset in code at end
}
}
// something gone wrong so manually index
if (rootObj == null) { // see 21382
offset.clear();
offset.reuse();
// needs to be read to pick up potential /Pages value
//noinspection ObjectAllocationInLoop
rootObj = new PageObject(BrokenRefTable.findOffsets(pdf_datafile, offset));
currentPdfFile.readObject(rootObj);
offset.setRefTableInvalid(true);
}
return rootObj;
}
/** for the use of the printf commend */
private static String convertToken(final String token, final String arg1) {
if (!StringUtils.isNumber(arg1)) {
return "";
}
final byte[] bytes = StringUtils.toBytes(arg1);
final double value = NumberUtils.parseDouble(0, bytes.length, bytes);
// a seperator is used for dates, phone numbers, times, ete
int decimalPoints = -1, minWidth = 0;
char decimal = '.'; // seperator = ',',
boolean padd = false, floatDecimal = false;
final StringBuilder sValue =
new StringBuilder(); // used to store the value in string form for each type of output
final StringBuilder returnString = new StringBuilder();
// conversion token layout: %[,nDecSep][cFlags][nWidth][.nPrecision]cConvChar
final char[] tokArray = token.toCharArray();
if (tokArray[0] == '%') {
int i = 1;
final int size = tokArray.length;
loop:
while (i < size) {
switch (tokArray[i]) {
case ',':
// nDecSep - A comma character (,) followed by a digit that indicates the
// decimal/separator format:
switch (tokArray[++i]) {
case '0':
// 0 � Comma separated, period decimal point
// seperator = ',';
decimal = '.';
break;
case '1':
// 1 � No separator, period decimal point
// seperator = 0;
decimal = '.';
break;
case '2':
// 2 � Period separated, comma decimal point
// seperator = '.';
decimal = ',';
break;
case '3':
// 3 � No separator, comma decimal point
// seperator = 0;
decimal = ',';
break;
}
break;
// cFlags - Only valid for numeric conversions and consists of a number of characters
// (in any order),
// which will modify the specification:
case '+': // cFlags
// + � Specifies that the number will always be formatted with a sign.
if (value > 0) {
returnString.append('+');
} else {
returnString.append('-');
}
break;
case ' ': // cFlags
// space � If the first character is not a sign, a space will be prefixed.
if (value > 0) {
returnString.append(' ');
} else {
returnString.append('-');
}
break;
case '0': // cFlags
// 0 � Specifies padding to the field with leading zeros.
padd = true;
break;
case '#': // cFlags
// # � Specifies an alternate output form. For f, the output will always have a
// decimal point.
floatDecimal = true;
break;
case '.':
// nPrecision - A period character (.) followed by a number that specifies the
// number of digits
// after the decimal point for float conversions.
decimalPoints = Integer.parseInt(String.valueOf(tokArray[++i]));
break;
case 'd': // cConvChar
// d � Integer (truncating if necessary)
sValue.append((int) value);
if (padd) {
final int stringlen = returnString.length() + sValue.length();
if (stringlen < minWidth) {
for (int p = 0; p < minWidth - stringlen; p++) {
returnString.append('0');
}
}
}
returnString.append(sValue);
break loop;
case 'f': // cConvChar
// f � Floating-point number
if (decimalPoints != -1) {
if (decimalPoints == 0) {
sValue.append((int) value);
} else {
final NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(decimalPoints);
nf.setMaximumFractionDigits(decimalPoints);
sValue.append(nf.format(value));
}
} else {
sValue.append((float) value);
}
if (floatDecimal && sValue.indexOf(".") != -1) {
sValue.append('.');
}
if (padd) {
final int stringlen = returnString.length() + sValue.length();
if (stringlen < minWidth) {
for (int p = 0; p < minWidth - stringlen; p++) {
returnString.append('0');
}
}
}
String ssVal = sValue.toString();
ssVal = ssVal.replace('.', decimal); // replace the decimal point with the defined one
returnString.append(ssVal);
break loop;
case 's': // cConvChar
// s � String
sValue.append(value); // amay need arg1
if (padd) {
final int stringlen = returnString.length() + sValue.length();
if (stringlen < minWidth) {
for (int p = 0; p < minWidth - stringlen; p++) {
returnString.append('0');
}
}
}
returnString.append(sValue);
break loop;
case 'x': // cConvChar
// x � Integer (truncating if necessary) and formatted in unsigned hexadecimal
// notation
final int valI = (int) (value);
final String retValS = Integer.toHexString(valI);
sValue.append(retValS);
if (padd) {
final int stringlen = returnString.length() + sValue.length();
if (stringlen < minWidth) {
for (int p = 0; p < minWidth - stringlen; p++) {
returnString.append('0');
}
}
}
returnString.append(sValue);
break loop;
default:
// nWidth - A number specifying a minimum field width. The converted argument is
// formatted to be at
// least this many characters wide, including the sign and decimal point, and may be
// wider
// if necessary. If the converted argument has fewer characters than the field
// width, it is
// padded on the left to make up the field width. The padding character is normally
// a space,
// but is 0 if the zero padding flag is present (cFlags contains 0).
minWidth = NumberUtils.parseInt(0, 1, new byte[] {(byte) tokArray[i]});
break;
}
i++;
} // end while loop
}
return returnString.toString();
}
