Improved documentation and fixed code violations in stream.php

Signed-off-by: Chanaka Indrajith <pe.chanaka.ck@gmail.com>
This commit is contained in:
Chanaka Indrajith 2013-12-18 01:34:05 +05:30
parent ab42fd2ac9
commit 7c971c0409

View File

@ -1,5 +1,5 @@
<?php
/*
/**
Copyright (c) 2003, 2005, 2006, 2009 Danilo Segan <danilo@kvota.net>.
This file is part of PHP-gettext.
@ -21,146 +21,291 @@
*/
// Simple class to wrap file streams, string streams, etc.
// seek is essential, and it should be byte stream
class StreamReader {
// should return a string [FIXME: perhaps return array of bytes?]
function read($bytes) {
return false;
}
// should return new position
function seekto($position) {
return false;
}
// returns current position
function currentpos() {
return false;
}
// returns length of entire stream (limit for seekto()s)
function length() {
return false;
}
};
class StringReader {
var $_pos;
var $_str;
function StringReader($str='') {
$this->_str = $str;
$this->_pos = 0;
}
function read($bytes) {
$data = substr($this->_str, $this->_pos, $bytes);
$this->_pos += $bytes;
if (strlen($this->_str)<$this->_pos)
$this->_pos = strlen($this->_str);
return $data;
}
function seekto($pos) {
$this->_pos = $pos;
if (strlen($this->_str)<$this->_pos)
$this->_pos = strlen($this->_str);
return $this->_pos;
}
function currentpos() {
return $this->_pos;
}
function length() {
return strlen($this->_str);
}
};
class FileReader {
var $_pos;
var $_fd;
var $_length;
function FileReader($filename) {
if (file_exists($filename)) {
$this->_length=filesize($filename);
$this->_pos = 0;
$this->_fd = fopen($filename,'rb');
if (!$this->_fd) {
$this->error = 3; // Cannot read file, probably permissions
/**
* Simple class to wrap file streams, string streams, etc.
* seek is essential, and it should be byte stream
*
* @package PhpMyAdmin
*/
class StreamReader
{
/**
* Read the given stream.
*
* @param type $bytes The content to read.
*
* @todo return a string [FIXME: perhaps return array of bytes?]
*
* @return type
*/
function read($bytes)
{
return false;
}
} else {
$this->error = 2; // File doesn't exist
return false;
}
}
function read($bytes) {
if ($bytes) {
fseek($this->_fd, $this->_pos);
/**
* Go to the position in the stream.
*
* @param type $position The position to go.
*
* @todo return new position
*
* @return type
*/
function seekto($position)
{
return false;
}
// PHP 5.1.1 does not read more than 8192 bytes in one fread()
// the discussions at PHP Bugs suggest it's the intended behaviour
$data = '';
while ($bytes > 0) {
$chunk = fread($this->_fd, $bytes);
$data .= $chunk;
$bytes -= strlen($chunk);
}
$this->_pos = ftell($this->_fd);
/**
* Get the curent postion in the stream.
*
* @todo return current position
*
* @return type
*/
function currentpos()
{
return false;
}
return $data;
} else return '';
}
/**
* Get the stream length.
*
* @todo return length of entire stream (limit for seekto()s)
*
* @return type
*/
function length()
{
return false;
}
};
function seekto($pos) {
fseek($this->_fd, $pos);
$this->_pos = ftell($this->_fd);
return $this->_pos;
}
/**
* This class is responsible for read a string.
*
* @package PhpMyAdmin
*/
class StringReader
{
var $_pos;
var $_str;
function currentpos() {
return $this->_pos;
}
/**
* The constructor for the StringReader class.
*
* @param string $str The string to do operations.
*/
function StringReader($str='')
{
$this->_str = $str;
$this->_pos = 0;
}
function length() {
return $this->_length;
}
/**
* Read the given string content.
*
* @param type $bytes The string content.
*
* @return type
*/
function read($bytes)
{
$data = substr($this->_str, $this->_pos, $bytes);
$this->_pos += $bytes;
if (strlen($this->_str)<$this->_pos) {
$this->_pos = strlen($this->_str);
}
return $data;
}
function close() {
fclose($this->_fd);
}
/**
* Go to the given position in the string.
*
* @param int $pos The position to go.
*
* @return int
*/
function seekto($pos)
{
$this->_pos = $pos;
if (strlen($this->_str)<$this->_pos) {
$this->_pos = strlen($this->_str);
}
return $this->_pos;
}
/**
* Get current position in the string.
*
* @return int
*/
function currentpos()
{
return $this->_pos;
}
/**
* Get length of the a string.
*
* @return int
*/
function length()
{
return strlen($this->_str);
}
};
// Preloads entire file in memory first, then creates a StringReader
// over it (it assumes knowledge of StringReader internals)
class CachedFileReader extends StringReader {
function CachedFileReader($filename) {
if (file_exists($filename)) {
$length=filesize($filename);
$fd = fopen($filename,'rb');
/**
* This class is responsible for read a file.
*
* @package PhpMyAdmin
*/
class FileReader
{
var $_pos;
var $_fd;
var $_length;
if (!$fd) {
$this->error = 3; // Cannot read file, probably permissions
return false;
}
$this->_str = fread($fd, $length);
fclose($fd);
/**
* Read the given file.
*
* @param string $filename The file path to read.
*
* @return type
*/
function FileReader($filename)
{
if (file_exists($filename)) {
} else {
$this->error = 2; // File doesn't exist
return false;
$this->_length=filesize($filename);
$this->_pos = 0;
$this->_fd = fopen($filename, 'rb');
if (!$this->_fd) {
$this->error = 3; // Cannot read file, probably permissions
return false;
}
} else {
$this->error = 2; // File doesn't exist
return false;
}
}
}
/**
* Read the given file content.
*
* @param type $bytes The file content.
*
* @return type
*/
function read($bytes)
{
if ($bytes) {
fseek($this->_fd, $this->_pos);
// PHP 5.1.1 does not read more than 8192 bytes in one fread()
// the discussions at PHP Bugs suggest it's the intended behaviour
$data = '';
while ($bytes > 0) {
$chunk = fread($this->_fd, $bytes);
$data .= $chunk;
$bytes -= strlen($chunk);
}
$this->_pos = ftell($this->_fd);
return $data;
} else {
return '';
}
}
/**
* Go to the given line in the file.
*
* @param int $pos The line to go.
*
* @return int
*/
function seekto($pos)
{
fseek($this->_fd, $pos);
$this->_pos = ftell($this->_fd);
return $this->_pos;
}
/**
* Get current position in the file.
*
* @return int
*/
function currentpos()
{
return $this->_pos;
}
/**
* Get the file size.
*
* @return int the size of the file in bytes.
*/
function length()
{
return $this->_length;
}
/**
* Close the file
*/
function close()
{
fclose($this->_fd);
}
};
/**
* Preloads entire file in memory first, then creates a StringReader
* over it (it assumes knowledge of StringReader internals)
*
* @package PhpMyAdmin
*/
class CachedFileReader extends StringReader
{
/**
* Read cached file.
*
* @param string $filename Path to the file or directory.
*
* @return type
*/
function CachedFileReader($filename)
{
if (file_exists($filename)) {
$length=filesize($filename);
$fd = fopen($filename, 'rb');
if (!$fd) {
$this->error = 3; // Cannot read file, probably permissions
return false;
}
$this->_str = fread($fd, $length);
fclose($fd);
} else {
$this->error = 2; // File doesn't exist
return false;
}
}
};