CkByteData Perl Reference Documentation

CkByteData

Current Version: 9.5.0.72

Represents a chunk of byte data and provides methods for accessing it, adding to it, or saving and loading from files.

Object Creation

$obj = chilkat::CkByteData()->new();

Methods

append
# $db is a CkByteData
$ckByteData->append($db);

Appends byte data to the data already contained in the object.

top
append2
# $pByteData is binary data
# $szByteData is an integer
$ckByteData->append2($pByteData, $szByteData);

Appends bytes to the data already contained in the object.

top
appendChar
# $ch is a char
$ckByteData->appendChar($ch);

Appends a single byte.

top
appendCharN
# $ch is a char
# $numTimes is an integer
$ckByteData->appendCharN($ch, $numTimes);

Appends a single char N times. The equivalent of calling appendChar N times.

top
appendEncoded
# $str is a string
# $encoding is a string
$ckByteData->appendEncoded($str, $encoding);

Appends binary data from an encoded string. The encoding can be specified as "hex", "base64", "url", "quoted-printable", "modBase64", "base58", or "base32". The input string is decoded from the specified encoding and the binary data is appended to the calling object's content.

top
appendEncodedW
# $str is a utf-16 string
# $encoding is a utf-16 string
$ckByteData->appendEncodedW($str, $encoding);

To be documented soon...

top
appendFile
# $path is a string
$retBool = $ckByteData->appendFile($path);

Opens a file for binary read, appends the file contents, and closes the file.

top
appendFileW
# $path is a utf-16 string
$retBool = $ckByteData->appendFileW($path);

To be documented soon...

top
appendInt
# $intValue is an integer
# $littleEndian is a boolean
$ckByteData->appendInt($intValue, $littleEndian);

Appends a 32-bit signed integer (4 bytes) to the data already contained in the object. littleEndian determines whether the big endian or little endian byte ordering is used.

top
appendRandom
# $numBytes is an integer
$ckByteData->appendRandom($numBytes);

Appends numBytes random bytes to the data already contained within the object.

top
appendRange
# $byteData is a CkByteData
# $index is an integer
# $numBytes is an integer
$ckByteData->appendRange($byteData, $index, $numBytes);

Appends a range of bytes from byteData to the data contained withing the caller. The first byte is at index 0.

top
appendShort
# $shortValue is an integer
# $littleEndian is a boolean
$ckByteData->appendShort($shortValue, $littleEndian);

Appends a 16-bit signed integer (2 bytes) to the data already contained in the object. littleEndian determines whether the big endian or little endian byte ordering is used.

top
appendStr
# $str is a string
$ckByteData->appendStr($str);

Appends a null-terminated string to the data, without including the terminating null.

top
appendStrW
# $str is a utf-16 string
# $charset is a utf-16 string
$ckByteData->appendStrW($str, $charset);

To be documented soon...

top
beginsWith
# $byteDataObj is a CkByteData
$retBool = $ckByteData->beginsWith($byteDataObj);

Returns 1 if the caller's data begins with the exact bytes contained within byteDataObj.

top
beginsWith2
# $pByteData is binary data
# $szByteData is an integer
$retBool = $ckByteData->beginsWith2($pByteData, $szByteData);

Returns 1 if the caller's data begins with specified bytes.

top
byteSwap4321
$ckByteData->byteSwap4321();

4321 byte swaps the data contained within the object.

top
clear
$ckByteData->clear();

Clears the CkByteData object of all data.

top
encode
# $encoding is a string
# $str is a CkString
$ckByteData->encode($encoding, $str);

Encodes binary data according to the encoding requested. The encoding can be specified as "hex", "base64", "url", "quoted-printable", "modBase64", "base58", "base32", "qp-", "url_rfc1738", "url_rfc2396", or "url_rfc3986".

top
encodeW
# $encoding is a utf-16 string
# $str is a CkString
$ckByteData->encodeW($encoding, $str);

To be documented soon...

top
ensureBuffer
# $expectedNumBytes is an integer
$status = $ckByteData->ensureBuffer($expectedNumBytes);

This method can be called to help optimize internal memory re-allocation. If, for example, many calls will be made to append data, and the total size is approximately known, then this method can be called to pre-allocate the internal buffer to the expected total size.

Returns 1 for success, 0 for failure.

top
equals
# $compareBytes is a CkByteData
$retBool = $ckByteData->equals($compareBytes);

Returns 1 if compareBytes contains exactly the same content as the caller. Otherwise returns 0.

top
equals2
# $pCompareBytes is binary data
# $numBytes is an integer
$retBool = $ckByteData->equals2($pCompareBytes, $numBytes);

Returns 1 if the bytes pointed to by pCompareBytes contains exactly the same content as the caller. Otherwise returns 0.

top
findBytes
# $byteDataObj is a CkByteData
$retInt = $ckByteData->findBytes($byteDataObj);

Locates the first occurrence of the bytes contained in byteDataObj and returns the index of where these bytes occur in the caller's data. Returns -1 if not found.

top
findBytes2
# $findBytes is binary data
# $findBytesLen is an integer
$retInt = $ckByteData->findBytes2($findBytes, $findBytesLen);

Locates the first occurrence of the specified bytes and returns the index of where these bytes occur in the caller's data. Returns -1 if not found.

top
getByte
# $byteIndex is an integer
$retByte = $ckByteData->getByte($byteIndex);

Returns the Nth byte of the binary data. The 1st byte is at index 0.

top
getBytes
$binary_data = $ckByteData->getBytes();
This method is deprecated. It will be removed in a future version.

Returns a pointer to the bytes contained within the object. Be very careful with the pointer that is returned. If more data is appended to the object, an internal reallocation may occur such that the previously returned pointer is no longer valid.

This method is identical to the getData method. Use getData instead.

top
getChar
# $byteIndex is an integer
$retChar = $ckByteData->getChar($byteIndex);

Returns the Nth byte of the binary content as a "char". The 1st byte is at index 0.

top
getData
$binary_data = $ckByteData->getData();

Returns a pointer to the internal buffer. Be careful with this method because if additional data is appended, the data within the object may be relocated and the pointer may cease to be valid.

top
getDataAt
# $byteIndex is an integer
$binary_data = $ckByteData->getDataAt($byteIndex);

Same as getData, except it gets a pointer to the data at a byte offset. (0 = the start of buffer)

top
getEncodedW
# $encoding is a utf-16 string
$utf16_text = $ckByteData->getEncodedW($encoding);

The utf-16 version of getEncoded.

top
getInt
# $byteIndex is an integer
$retInt = $ckByteData->getInt($byteIndex);

Returns the 4-byte integer located at a specific byte index.

top
getRange
# $byteIndex is an integer
# $numBytes is an integer
$binary_data = $ckByteData->getRange($byteIndex, $numBytes);

Copies a range of bytes to a separate internal memory buffer and returns the pointer to the bytes. The returned pointer is only valid while the object exists. Also, any subsequent calls to getRange, getRangeStr, or to_s will invalidate the buffer.

top
getSize
$retInt = $ckByteData->getSize();

Returns the number of bytes in the data buffer.

top
is7bit
$retBool = $ckByteData->is7bit();

Returns 1 if all the bytes are in the range 0x00 to 0x7F.

top
loadFile
# $path is a string
$retBool = $ckByteData->loadFile($path);

Equivalent to clear() followed by appendFile().

top
loadFileW
# $path is a utf-16 string
$retBool = $ckByteData->loadFileW($path);

To be documented soon...

top
pad
# $blockSize is an integer
# $paddingScheme is an integer
$ckByteData->pad($blockSize, $paddingScheme);

Pads the data to a multiple of the blockSize using a cryptographic padding scheme specified by paddingScheme. The possible integer values for paddingScheme are the same as those listed for the PaddingScheme property of the CkCrypt2 class.

top
preAllocate
# $expectedNumBytes is an integer
$retBool = $ckByteData->preAllocate($expectedNumBytes);
This method is deprecated. It will be removed in a future version.

This method can be called to help optimize internal memory re-allocation. If, for example, many calls will be made to append data, and the total size is approximately known, then this method can be called to pre-allocate the internal buffer to the expected total size.

This method is identical to the ensureBuffer method. Use ensureBuffer instead.

top
removeChunk
# $startIndex is an integer
# $numBytes is an integer
$ckByteData->removeChunk($startIndex, $numBytes);

Removes (discards) a range from the data.

top
replaceChar
# $existingByteValue is a byte
# $replacementByteValue is a byte
$ckByteData->replaceChar($existingByteValue, $replacementByteValue);

Replaces all occurrences of existingByteValue with replacementByteValue.

top
saveFile
# $path is a string
$retBool = $ckByteData->saveFile($path);

Saves the byte data to a file. If the file already exists, it will be overwritten.

top
saveFileW
# $path is a utf-16 string
$retBool = $ckByteData->saveFileW($path);

To be documented soon...

top
shorten
# $numBytes is an integer
$ckByteData->shorten($numBytes);

Discards N bytes from the end of the data.

top
to_ws
# $charset is a string
$utf16_text = $ckByteData->to_ws($charset);

To be documented soon...

top
unpad
# $blockSize is an integer
# $paddingScheme is an integer
$ckByteData->unpad($blockSize, $paddingScheme);

Unpads the data from a multiple of the blockSize to the original data size using a cryptographic padding scheme specified by paddingScheme. The possible integer values for paddingScheme are the same as those listed for the PaddingScheme property of the CkCrypt2 class.

top