private $helperInstance = null;
/**
- * An instance of a source
+ * An instance of a Sourceable class
*/
private $sourceInstance = null;
+ /**
+ * An instance of a InputStreamable class
+ */
+ private $inputStreamInstance = null;
+
+ /**
+ * An instance of a OutputStreamable class
+ */
+ private $outputStreamInstance = null;
+
/**
* The real class name
*/
/***********************
* Exception codes.... *
***********************/
+
// @todo Try to clean these constants up
const EXCEPTION_IS_NULL_POINTER = 0x001;
const EXCEPTION_IS_NO_OBJECT = 0x002;
const EXCEPTION_DATABASE_UPDATED_NOT_ALLOWED = 0x039;
const EXCEPTION_FILTER_CHAIN_INTERCEPTED = 0x040;
+ // Hexadecimal->Decimal translation array
+ private static $hexdec = array(
+ '0' => 0,
+ '1' => 1,
+ '2' => 2,
+ '3' => 3,
+ '4' => 4,
+ '5' => 5,
+ '6' => 6,
+ '7' => 7,
+ '8' => 8,
+ '9' => 9,
+ 'a' => 10,
+ 'b' => 11,
+ 'c' => 12,
+ 'd' => 13,
+ 'e' => 14,
+ 'f' => 15
+ );
+
+ // Decimal->hexadecimal translation array
+ private static $dechex = array(
+ 0 => '0',
+ 1 => '1',
+ 2 => '2',
+ 3 => '3',
+ 4 => '4',
+ 5 => '5',
+ 6 => '6',
+ 7 => '7',
+ 8 => '8',
+ 9 => '9',
+ 10 => 'a',
+ 11 => 'b',
+ 12 => 'c',
+ 13 => 'd',
+ 14 => 'e',
+ 15 => 'f'
+ );
+
/**
* Protected super constructor
*
}
/**
- * Getter for a Sourceable instance
+ * Getter for a InputStreamable instance
*
- * @param $sourceInstance The Sourceable instance
+ * @param $inputStreamInstance The InputStreamable instance
+ */
+ protected final function getInputStreamInstance () {
+ return $this->inputStreamInstance;
+ }
+
+ /**
+ * Setter for a InputStreamable instance
+ *
+ * @param $inputStreamInstance The InputStreamable instance
+ * @return void
+ */
+ protected final function setInputStreamInstance (InputStreamable $inputStreamInstance) {
+ $this->inputStreamInstance = $inputStreamInstance;
+ }
+
+ /**
+ * Getter for a OutputStreamable instance
+ *
+ * @param $outputStreamInstance The OutputStreamable instance
*/
- protected final function getSourceInstance () {
- return $this->sourceInstance;
+ protected final function getOutputStreamInstance () {
+ return $this->outputStreamInstance;
+ }
+
+ /**
+ * Setter for a OutputStreamable instance
+ *
+ * @param $outputStreamInstance The OutputStreamable instance
+ * @return void
+ */
+ protected final function setOutputStreamInstance (OutputStreamable $outputStreamInstance) {
+ $this->outputStreamInstance = $outputStreamInstance;
}
/**
* @param $hex Hexadecimal string
* @return $dec Decimal number
*/
- function hex2dec ($hex) {
+ protected function hex2dec ($hex) {
// Convert to all lower-case
$hex = strtolower($hex);
- // Hexadecimal->Decimal translation array
- $hexdec = array(
- '0' => 0,
- '1' => 1,
- '2' => 2,
- '3' => 3,
- '4' => 4,
- '5' => 5,
- '6' => 6,
- '7' => 7,
- '8' => 8,
- '9' => 9,
- 'a' => 10,
- 'b' => 11,
- 'c' => 12,
- 'd' => 13,
- 'e' => 14,
- 'f' => 15
- );
-
// Detect sign (negative/positive numbers)
$sign = '';
if (substr($hex, 0, 1) == '-') {
// Decode the hexadecimal string into a decimal number
$dec = 0;
for ($i = strlen($hex) - 1, $e = 1; $i >= 0; $i--, $e = bcmul($e, 16)) {
- $factor = $hexdec[substr($hex, $i, 1)];
+ $factor = self::$hexdec[substr($hex, $i, 1)];
$dec = bcadd($dec, bcmul($factor, $e));
} // END - for
* This work is based on comment #97756 on php.net documentation page at:
* <http://de.php.net/manual/en/function.hexdec.php#97756>
*
- * @param $dec Decimal number, even with negative sign
+ * @param $dec Decimal number, even with negative sign
+ * @param $maxLength Optional maximum length of the string
* @return $hex Hexadecimal string
*/
- function dec2hex ($dec) {
+ protected function dec2hex ($dec, $maxLength = 0) {
+ // maxLength can be zero or devideable by 2
+ assert(($maxLength == 0) || (($maxLength % 2) == 0));
+
// Detect sign (negative/positive numbers)
$sign = '';
if ($dec < 0) {
$dec = abs($dec);
} // END - if
- // Decimal->hexadecimal translation array
- $hexAlphabet = array(
- 0 => '0',
- 1 => '1',
- 2 => '2',
- 3 => '3',
- 4 => '4',
- 5 => '5',
- 6 => '6',
- 7 => '7',
- 8 => '8',
- 9 => '9',
- 10 => 'a',
- 11 => 'b',
- 12 => 'c',
- 13 => 'd',
- 14 => 'e',
- 15 => 'f'
- );
-
// Encode the decimal number into a hexadecimal string
$hex = '';
do {
- $hex = $hexAlphabet[($dec % 16)] . $hex;
+ $hex = self::$dechex[($dec % 16)] . $hex;
$dec /= 16;
- } while( $dec >= 1 );
+ } while ($dec >= 1);
+
+ /*
+ * We need hexadecimal strings with leading zeros if the length cannot
+ * be divided by 2
+ */
+ if ($maxLength > 0) {
+ // Prepend more zeros
+ $hex = $this->prependStringToString($hex, '0', $maxLength);
+ } elseif ((strlen($hex) % 2) != 0) {
+ $hex = '0' . $hex;
+ }
// Return the hexadecimal string
return $sign . $hex;
}
+
+ /**
+ * Converts a ASCII string (0 to 255) into a decimal number.
+ *
+ * @param $asc The ASCII string to be converted
+ * @return $dec Decimal number
+ */
+ protected function asc2dec ($asc) {
+ // Convert it into a hexadecimal number
+ $hex = bin2hex($asc);
+
+ // And back into a decimal number
+ $dec = $this->hex2dec($hex);
+
+ // Return it
+ return $dec;
+ }
+
+ /**
+ * Converts a decimal number into an ASCII string.
+ *
+ * @param $dec Decimal number
+ * @return $asc An ASCII string
+ */
+ protected function dec2asc ($dec) {
+ // First convert the number into a hexadecimal string
+ $hex = $this->dec2hex($dec);
+
+ // Then convert it into the ASCII string
+ $asc = $this->hex2asc($hex);
+
+ // Return it
+ return $asc;
+ }
+
+ /**
+ * Converts a hexadecimal number into an ASCII string. Negative numbers
+ * are not allowed.
+ *
+ * @param $hex Hexadecimal string
+ * @return $asc An ASCII string
+ */
+ protected function hex2asc ($hex) {
+ // Check for length, it must be devideable by 2
+ //* DEBUG: */ $this->debugOutput('hex='.$hex);
+ assert((strlen($hex) % 2) == 0);
+
+ // Walk the string
+ $asc = '';
+ for ($idx = 0; $idx < strlen($hex); $idx+=2) {
+ // Get the decimal number of the chunk
+ $part = hexdec(substr($hex, $idx, 2));
+
+ // Add it to the final string
+ $asc .= chr($part);
+ } // END - for
+
+ // Return the final string
+ return $asc;
+ }
+
+ /**
+ * Prepends a given string $prepend to $str with a given total length
+ *
+ * @param $str Given original string which should be prepended
+ * @param $prepend The string to prepend
+ * @param $length Total length of the final string
+ * @return $strFinal Final prepended string
+ */
+ protected function prependStringToString ($str, $prepend, $length) {
+ // Set final string to original string by default
+ $strFinal = $str;
+
+ // Can it devided
+ if (strlen($str) < $length) {
+ // Difference between total length and length of original string
+ $diff = $length - strlen($str);
+
+ // Prepend the string
+ $prepend = str_repeat($prepend, ($diff / strlen($prepend) + 1));
+
+ // Make sure it will definedly fit
+ assert(strlen($prepend) >= $diff);
+
+ // Cut it a little down
+ $prepend = substr($prepend, 0, $diff);
+ //* DEBUG: */ $this->debugOutput('prepend('.strlen($prepend).')='.$prepend.',diff='.$diff.',length='.$length);
+
+ // Construct the final prepended string
+ $strFinal = $prepend . $str;
+ } // END - if
+
+ // Return it
+ return $strFinal;
+ }
}
// [EOF]
projects / core.git / blobdiff