* Classes, which help reading streams of data from files.
* Based on the classes from Danilo Segan <danilo@kvota.net>
*
- * @version $Id: streams.php 138 2009-06-23 13:22:09Z nbachiyski $
+ * @version $Id: streams.php 293 2009-11-12 15:43:50Z nbachiyski $
* @package pomo
* @subpackage streams
*/
-
-/**
- * Provides file-like methods for manipulating a string instead
- * of a physical file.
- */
-class POMO_StringReader {
- var $_pos;
- var $_str;
-
- function POMO_StringReader($str = '') {
- $this->_str = $str;
- $this->_pos = 0;
+if ( !class_exists( 'POMO_Reader' ) ):
+class POMO_Reader {
+
+ var $endian = 'little';
+ var $_post = '';
+
+ function POMO_Reader() {
$this->is_overloaded = ((ini_get("mbstring.func_overload") & 2) != 0) && function_exists('mb_substr');
+ $this->_pos = 0;
+ }
+
+ /**
+ * Sets the endianness of the file.
+ *
+ * @param $endian string 'big' or 'little'
+ */
+ function setEndian($endian) {
+ $this->endian = $endian;
+ }
+
+ /**
+ * Reads a 32bit Integer from the Stream
+ *
+ * @return mixed The integer, corresponding to the next 32 bits from
+ * the stream of false if there are not enough bytes or on error
+ */
+ function readint32() {
+ $bytes = $this->read(4);
+ if (4 != $this->strlen($bytes))
+ return false;
+ $endian_letter = ('big' == $this->endian)? 'N' : 'V';
+ $int = unpack($endian_letter, $bytes);
+ return array_shift($int);
}
- function _substr($string, $start, $length) {
+ /**
+ * Reads an array of 32-bit Integers from the Stream
+ *
+ * @param integer count How many elements should be read
+ * @return mixed Array of integers or false if there isn't
+ * enough data or on error
+ */
+ function readint32array($count) {
+ $bytes = $this->read(4 * $count);
+ if (4*$count != $this->strlen($bytes))
+ return false;
+ $endian_letter = ('big' == $this->endian)? 'N' : 'V';
+ return unpack($endian_letter.$count, $bytes);
+ }
+
+
+ function substr($string, $start, $length) {
if ($this->is_overloaded) {
- return mb_substr($string,$start,$length,'ascii');
+ return mb_substr($string, $start, $length, 'ascii');
} else {
- return substr($string,$start,$length);
+ return substr($string, $start, $length);
}
}
- function _strlen($string) {
+ function strlen($string) {
if ($this->is_overloaded) {
- return mb_strlen($string,'ascii');
+ return mb_strlen($string, 'ascii');
} else {
return strlen($string);
}
}
+
+ function str_split($string, $chunk_size) {
+ if (!function_exists('str_split')) {
+ $length = $this->strlen($string);
+ $out = array();
+ for ($i = 0; $i < $length; $i += $chunk_size)
+ $out[] = $this->substr($string, $i, $chunk_size);
+ return $out;
+ } else {
+ return str_split( $string, $chunk_size );
+ }
+ }
+
+
+ function pos() {
+ return $this->_pos;
+ }
+
+ function is_resource() {
+ return true;
+ }
+
+ function close() {
+ return true;
+ }
+}
+endif;
+
+if ( !class_exists( 'POMO_FileReader' ) ):
+class POMO_FileReader extends POMO_Reader {
+ function POMO_FileReader($filename) {
+ parent::POMO_Reader();
+ $this->_f = fopen($filename, 'r');
+ }
+
+ function read($bytes) {
+ return fread($this->_f, $bytes);
+ }
+
+ function seekto($pos) {
+ if ( -1 == fseek($this->_f, $pos, SEEK_SET)) {
+ return false;
+ }
+ $this->_pos = $pos;
+ return true;
+ }
+
+ function is_resource() {
+ return is_resource($this->_f);
+ }
+
+ function feof() {
+ return feof($this->_f);
+ }
+
+ function close() {
+ return fclose($this->_f);
+ }
+
+ function read_all() {
+ $all = '';
+ while ( !$this->feof() )
+ $all .= $this->read(4096);
+ return $all;
+ }
+}
+endif;
+
+if ( !class_exists( 'POMO_StringReader' ) ):
+/**
+ * Provides file-like methods for manipulating a string instead
+ * of a physical file.
+ */
+class POMO_StringReader extends POMO_Reader {
+
+ var $_str = '';
+
+ function POMO_StringReader($str = '') {
+ parent::POMO_Reader();
+ $this->_str = $str;
+ $this->_pos = 0;
+ }
+
function read($bytes) {
- $data = $this->_substr($this->_str, $this->_pos, $bytes);
+ $data = $this->substr($this->_str, $this->_pos, $bytes);
$this->_pos += $bytes;
- if ($this->_strlen($this->_str) < $this->_pos) $this->_pos = $this->_strlen($this->_str);
+ if ($this->strlen($this->_str) < $this->_pos) $this->_pos = $this->strlen($this->_str);
return $data;
}
function seekto($pos) {
$this->_pos = $pos;
- if ($this->_strlen($this->_str) < $this->_pos) $this->_pos = $this->_strlen($this->_str);
- return $this->_pos;
- }
-
- function pos() {
+ if ($this->strlen($this->_str) < $this->_pos) $this->_pos = $this->strlen($this->_str);
return $this->_pos;
}
function length() {
- return $this->_strlen($this->_str);
+ return $this->strlen($this->_str);
}
+ function read_all() {
+ return $this->substr($this->_str, $this->_pos, $this->strlen($this->_str));
+ }
+
}
+endif;
+if ( !class_exists( 'POMO_CachedFileReader' ) ):
/**
* Reads the contents of the file in the beginning.
*/
$this->_pos = 0;
}
}
+endif;
+if ( !class_exists( 'POMO_CachedIntFileReader' ) ):
/**
- * Allows reading integers from a file.
+ * Reads the contents of the file in the beginning.
*/
class POMO_CachedIntFileReader extends POMO_CachedFileReader {
-
- var $endian = 'little';
-
- /**
- * Opens a file and caches it.
- *
- * @param $filename string name of the file to be opened
- * @param $endian string endianness of the words in the file, allowed
- * values are 'little' or 'big'. Default value is 'little'
- */
- function POMO_CachedIntFileReader($filename, $endian = 'little') {
- $this->endian = $endian;
+ function POMO_CachedIntFileReader($filename) {
parent::POMO_CachedFileReader($filename);
}
-
- /**
- * Sets the endianness of the file.
- *
- * @param $endian string 'big' or 'little'
- */
- function setEndian($endian) {
- $this->endian = $endian;
- }
-
- /**
- * Reads a 32bit Integer from the Stream
- *
- * @return mixed The integer, corresponding to the next 32 bits from
- * the stream of false if there are not enough bytes or on error
- */
- function readint32() {
- $bytes = $this->read(4);
- if (4 != $this->_strlen($bytes))
- return false;
- $endian_letter = ('big' == $this->endian)? 'N' : 'V';
- $int = unpack($endian_letter, $bytes);
- return array_shift($int);
- }
-
- /**
- * Reads an array of 32-bit Integers from the Stream
- *
- * @param integer count How many elements should be read
- * @return mixed Array of integers or false if there isn't
- * enough data or on error
- */
- function readint32array($count) {
- $bytes = $this->read(4 * $count);
- if (4*$count != $this->_strlen($bytes))
- return false;
- $endian_letter = ('big' == $this->endian)? 'N' : 'V';
- return unpack($endian_letter.$count, $bytes);
- }
}
-
-?>
+endif;
\ No newline at end of file
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