diff options
Diffstat (limited to 'system/libraries/Zip.php')
| -rw-r--r-- | system/libraries/Zip.php | 74 |
1 files changed, 61 insertions, 13 deletions
diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php index 140ad7212..25315c92e 100644 --- a/system/libraries/Zip.php +++ b/system/libraries/Zip.php @@ -106,12 +106,21 @@ class CI_Zip { public $compression_level = 2; /** + * mbstring.func_override flag + * + * @var bool + */ + protected static $func_override; + + /** * Initialize zip compression class * * @return void */ public function __construct() { + isset(self::$func_override) OR self::$func_override = (extension_loaded('mbstring') && ini_get('mbstring.func_override')); + $this->now = time(); log_message('info', 'Zip Compression Class Initialized'); } @@ -182,7 +191,7 @@ class CI_Zip { .pack('V', 0) // crc32 .pack('V', 0) // compressed filesize .pack('V', 0) // uncompressed filesize - .pack('v', strlen($dir)) // length of pathname + .pack('v', self::strlen($dir)) // length of pathname .pack('v', 0) // extra field length .$dir // below is "data descriptor" segment @@ -197,7 +206,7 @@ class CI_Zip { .pack('V',0) // crc32 .pack('V',0) // compressed filesize .pack('V',0) // uncompressed filesize - .pack('v', strlen($dir)) // length of pathname + .pack('v', self::strlen($dir)) // length of pathname .pack('v', 0) // extra field length .pack('v', 0) // file comment length .pack('v', 0) // disk number start @@ -206,7 +215,7 @@ class CI_Zip { .pack('V', $this->offset) // relative offset of local header .$dir; - $this->offset = strlen($this->zipdata); + $this->offset = self::strlen($this->zipdata); $this->entries++; } @@ -255,10 +264,10 @@ class CI_Zip { { $filepath = str_replace('\\', '/', $filepath); - $uncompressed_size = strlen($data); + $uncompressed_size = self::strlen($data); $crc32 = crc32($data); - $gzdata = substr(gzcompress($data, $this->compression_level), 2, -4); - $compressed_size = strlen($gzdata); + $gzdata = self::substr(gzcompress($data, $this->compression_level), 2, -4); + $compressed_size = self::strlen($gzdata); $this->zipdata .= "\x50\x4b\x03\x04\x14\x00\x00\x00\x08\x00" @@ -267,7 +276,7 @@ class CI_Zip { .pack('V', $crc32) .pack('V', $compressed_size) .pack('V', $uncompressed_size) - .pack('v', strlen($filepath)) // length of filename + .pack('v', self::strlen($filepath)) // length of filename .pack('v', 0) // extra field length .$filepath .$gzdata; // "file data" segment @@ -279,7 +288,7 @@ class CI_Zip { .pack('V', $crc32) .pack('V', $compressed_size) .pack('V', $uncompressed_size) - .pack('v', strlen($filepath)) // length of filename + .pack('v', self::strlen($filepath)) // length of filename .pack('v', 0) // extra field length .pack('v', 0) // file comment length .pack('v', 0) // disk number start @@ -288,7 +297,7 @@ class CI_Zip { .pack('V', $this->offset) // relative offset of local header .$filepath; - $this->offset = strlen($this->zipdata); + $this->offset = self::strlen($this->zipdata); $this->entries++; $this->file_num++; } @@ -401,8 +410,8 @@ class CI_Zip { .$this->directory."\x50\x4b\x05\x06\x00\x00\x00\x00" .pack('v', $this->entries) // total # of entries "on this disk" .pack('v', $this->entries) // total # of entries overall - .pack('V', strlen($this->directory)) // size of central dir - .pack('V', strlen($this->zipdata)) // offset to start of central dir + .pack('V', self::strlen($this->directory)) // size of central dir + .pack('V', self::strlen($this->zipdata)) // offset to start of central dir ."\x00\x00"; // .zip file comment length } @@ -425,9 +434,9 @@ class CI_Zip { flock($fp, LOCK_EX); - for ($result = $written = 0, $data = $this->get_zip(), $length = strlen($data); $written < $length; $written += $result) + for ($result = $written = 0, $data = $this->get_zip(), $length = self::strlen($data); $written < $length; $written += $result) { - if (($result = fwrite($fp, substr($data, $written))) === FALSE) + if (($result = fwrite($fp, self::substr($data, $written))) === FALSE) { break; } @@ -481,4 +490,43 @@ class CI_Zip { return $this; } + // -------------------------------------------------------------------- + + /** + * Byte-safe strlen() + * + * @param string $str + * @return int + */ + protected static function strlen($str) + { + return (self::$func_override) + ? mb_strlen($str, '8bit') + : strlen($str); + } + + // -------------------------------------------------------------------- + + /** + * Byte-safe substr() + * + * @param string $str + * @param int $start + * @param int $length + * @return string + */ + protected static function substr($str, $start, $length = NULL) + { + if (self::$func_override) + { + // mb_substr($str, $start, null, '8bit') returns an empty + // string on PHP 5.3 + isset($length) OR $length = ($start >= 0 ? self::strlen($str) - $start : -$start); + return mb_substr($str, $start, $length, '8bit'); + } + + return isset($length) + ? substr($str, $start, $length) + : substr($str, $start); + } } |