diff options
Diffstat (limited to 'buildscripts/phing/classes/phing/system/io/FileReader.php')
| -rw-r--r-- | buildscripts/phing/classes/phing/system/io/FileReader.php | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/buildscripts/phing/classes/phing/system/io/FileReader.php b/buildscripts/phing/classes/phing/system/io/FileReader.php new file mode 100644 index 00000000..cbea2c7e --- /dev/null +++ b/buildscripts/phing/classes/phing/system/io/FileReader.php @@ -0,0 +1,179 @@ +<?php +/* + * $Id: FileReader.php,v 1.9 2005/05/26 13:10:52 mrook Exp $ + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This software consists of voluntary contributions made by many individuals + * and is licensed under the LGPL. For more information please see + * <http://phing.info>. + */ + +include_once 'phing/system/io/PhingFile.php'; +include_once 'phing/system/io/Reader.php'; + +/** + * Convenience class for reading files. The constructor of this + * @package phing.system.io + */ + +class FileReader extends Reader { + + protected $file; + protected $fd; + + protected $currentPosition = 0; + protected $mark = 0; + + function __construct($file, $exclusive = false) { + + if ($file instanceof PhingFile) { + $this->file = $file; + } elseif (is_string($file)) { + $this->file = new PhingFile($file); + } else { + throw new Exception("Illegal argument type to " . __METHOD__); + } + } + + function skip($n) { + $this->open(); + + $start = $this->currentPosition; + + $ret = @fseek($this->fd, $n, SEEK_CUR); + if ( $ret === -1 ) + return -1; + + $this->currentPosition = ftell($this->fd); + + if ( $start > $this->currentPosition ) + $skipped = $start - $this->currentPosition; + else + $skipped = $this->currentPosition - $start; + + return $skipped; + } + + /** + * Read data from file. + * @param int $len Num chars to read. + * @return string chars read or -1 if eof. + */ + function read($len = null) { + $this->open(); + if (feof($this->fd)) { + return -1; + } + + // Compute length to read + // possible that filesize($this->file) will be larger than + // available bytes to read, but that's fine -- better to err on high end + $length = ($len === null) ? filesize($this->file->getAbsolutePath()) : $len; + + // Read data + $out = fread($this->fd, $length + 1); // adding 1 seems to ensure that next call to read() will return EOF (-1) + $this->currentPosition = ftell($this->fd); + + return $out; + } + + function mark($n = null) { + $this->mark = $this->currentPosition; + } + + function reset() { + // goes back to last mark, by default this would be 0 (i.e. rewind file). + fseek($this->fd, SEEK_SET, $this->mark); + $this->mark = 0; + } + + function close() { + if ($this->fd === null) { + return true; + } + + if (false === @fclose($this->fd)) { + // FAILED. + $msg = "Cannot fclose " . $this->file->__toString() . " $php_errormsg"; + throw new IOException($msg); + } else { + $this->fd = null; + return true; + } + } + + function open() { + global $php_errormsg; + + if ($this->fd === null) { + $this->fd = @fopen($this->file->getAbsolutePath(), "rb"); + } + + if ($this->fd === false) { + // fopen FAILED. + // Add error from php to end of log message. $php_errormsg. + $msg = "Cannot fopen ".$this->file->getAbsolutePath().". $php_errormsg"; + throw new IOException($msg); + } + + if (false) { + // Locks don't seem to work on windows??? HELP!!!!!!!!! + // if (FALSE === @flock($fp, LOCK_EX)) { // FAILED. + $msg = "Cannot acquire flock on $file. $php_errormsg"; + throw new IOException($msg); + } + + return true; + } + + /** + * Whether eof has been reached with stream. + * @return boolean + */ + function eof() { + return feof($this->fd); + } + + /** + * Reads a entire file and stores the data in the variable + * passed by reference. + * + * @param string $file String. Path and/or name of file to read. + * @param object &$rBuffer Reference. Variable of where to put contents. + * + * @return TRUE on success. Err object on failure. + * @author Charlie Killian, charlie@tizac.com + */ + function readInto(&$rBuffer) { + + $this->open(); + + $fileSize = $this->file->length(); + if ($fileSize === false) { + $msg = "Cannot get filesize of " . $this->file->__toString() . " $php_errormsg"; + throw new IOException($msg); + } + $rBuffer = fread($this->fd, $fileSize); + $this->close(); + } + + /** + * Returns path to file we are reading. + * @return string + */ + function getResource() { + return $this->file->toString(); + } +} +?> |