Package com.adobe.internal.pdftoolkit.core.util

Class ParseOps

java.lang.Object

com.adobe.internal.pdftoolkit.core.util.ParseOps

public final class ParseOps
extends Object

This class provides many utility methods related to parsing of stream.

Method Summary

Modifier and Type	Method	Description
static long	getEndObjPos(InputByteStream mBuf)	Gets the position of endobj keyword in this stream.
static byte[]	readHex(InputByteStream buf)	Parses a hexidecimal character string into a byte array.
static byte[]	readLiteral(InputByteStream inBuf)	This API reads the literals and returns as byte array.
static ASName	readName(InputByteStream buf)	Parses an atom from the PDF byte stream.
static ASNumber	readNumber(byte first, InputByteStream buf)	Parses a numerical value from the PDF byte stream.
static void	skipHex(InputByteStream buf)	Skips a hexidecimal character string.
static void	skipLiteral(InputByteStream inBuf)	This API skips all the literals in the stream passed.
static void	skipName(InputByteStream buf)	Skips an atom from the PDF byte stream.
static void	skipNumber(byte first, InputByteStream buf)	Skips over a numerical value from the PDF byte stream.
static byte	skipWhitespace(InputByteStream buf)	Skips over whitespace in the input stream.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

readHex

public static byte[] readHex(InputByteStream buf)
                      throws IOException,
                             PDFParseException

Parses a hexidecimal character string into a byte array. A pair of hex characters forms the value stored in a single byte of the array. Hexidecimal strings are defined in section 3.2.3 of the PDF Reference Manual version 1.4.

Parameters:

buf - Buffer to parse

Returns:

Data corresponding to the hex string

Throws:

IOException

PDFParseException - If there is a syntax error.

skipHex

public static void skipHex(InputByteStream buf)
                    throws IOException,
                           PDFParseException

Skips a hexidecimal character string. A pair of hex characters forms the value stored in a single byte of the array. Hexidecimal strings are defined in section 3.2.3 of the PDF Reference Manual version 1.4.

Parameters:

buf - Buffer to parse

Throws:

IOException

PDFParseException - If there is a syntax error.

skipLiteral

public static void skipLiteral(InputByteStream inBuf)
                        throws IOException

This API skips all the literals in the stream passed.

Throws:

IOException

readLiteral

public static byte[] readLiteral(InputByteStream inBuf)
                          throws IOException,
                                 PDFParseException

This API reads the literals and returns as byte array.

Throws:

PDFParseException

IOException

readName

public static ASName readName(InputByteStream buf)
                       throws IOException,
                              PDFParseException

Parses an atom from the PDF byte stream. An atom can be thought of as a COS name as defined in section 3.2.4 of the PDF Reference Manual version 1.4.

Parameters:

buf - PDF data buffer to parse

Returns:

ASName parsed from the buffer

Throws:

IOException

PDFParseException

skipName

public static void skipName(InputByteStream buf)
                     throws IOException,
                            PDFParseException

Skips an atom from the PDF byte stream. An atom can be thought of as a COS name as defined in section 3.2.4 of the PDF Reference Manual version 1.4.

Parameters:

buf - PDF data buffer to parse

Throws:

IOException

PDFParseException

readNumber

public static ASNumber readNumber(byte first,
                                  InputByteStream buf)
                           throws PDFParseException,
                                  IOException

Parses a numerical value from the PDF byte stream. A numeric object is defined in section 3.2.2 of the PDF Reference Manual version 1.4.

Parameters:

buf - Byte stream to parse

first - Starting byte to parse

Returns:

Parsed number.

Throws:

IOException

PDFParseException

skipNumber

public static void skipNumber(byte first,
                              InputByteStream buf)
                       throws PDFParseException,
                              IOException

Skips over a numerical value from the PDF byte stream. A numeric object is defined in section 3.2.2 of the PDF Reference Manual version 1.4.

Parameters:

buf - Byte stream to parse

first - Starting byte to parse

Throws:

IOException

PDFParseException

skipWhitespace

public static byte skipWhitespace(InputByteStream buf)
                           throws IOException

Skips over whitespace in the input stream. Whitespace is defined in section 3.1.1 of the PDF Reference Manual version 1.4. For the purposes of this method, comments are also considered whitespace.

Parameters:

buf - Buffer to parse

Returns:

The first non-whitespace byte encountered.

Throws:

IOException

getEndObjPos

public static long getEndObjPos(InputByteStream mBuf)
                         throws IOException

Gets the position of endobj keyword in this stream. If EOL is encountered before finding "endobj" -1 will be returned.

Parameters:

mBuf -

Returns:

long

Throws:

IOException