Meth8Ok = extension_loaded('zlib'); // check if Zlib extension is available. This is need for compress and uncompress with method 8.
$this->DisplayError = true;
$this->ArchFile = '';
$this->Error = false;
}
function CreateNew($ArchName='new.zip') {
// Create a new virtual empty archive, the name will be the default name when the archive is flushed.
if (!isset($this->Meth8Ok)) $this->__construct(); // for PHP 4 compatibility
$this->Close(); // note that $this->ArchHnd is set to false here
$this->Error = false;
$this->ArchFile = $ArchName;
$this->ArchIsNew = true;
$bin = 'PK'.chr(05).chr(06).str_repeat(chr(0), 18);
$this->CdEndPos = strlen($bin) - 4;
$this->CdInfo = array('disk_num_curr'=>0, 'disk_num_cd'=>0, 'file_nbr_curr'=>0, 'file_nbr_tot'=>0, 'l_cd'=>0, 'p_cd'=>0, 'l_comm'=>0, 'v_comm'=>'', 'bin'=>$bin);
$this->CdPos = $this->CdInfo['p_cd'];
}
function Open($ArchFile, $UseIncludePath=false) {
// Open the zip archive
if (!isset($this->Meth8Ok)) $this->__construct(); // for PHP 4 compatibility
$this->Close(); // close handle and init info
$this->Error = false;
$this->ArchIsNew = false;
$this->ArchIsStream = (is_resource($ArchFile) && (get_resource_type($ArchFile)=='stream'));
if ($this->ArchIsStream) {
$this->ArchFile = 'from_stream.zip';
$this->ArchHnd = $ArchFile;
} else {
// open the file
$this->ArchFile = $ArchFile;
$this->ArchHnd = fopen($ArchFile, 'rb', $UseIncludePath);
}
$ok = !($this->ArchHnd===false);
if ($ok) $ok = $this->CentralDirRead();
return $ok;
}
function Close() {
if (isset($this->ArchHnd) and ($this->ArchHnd!==false)) fclose($this->ArchHnd);
$this->ArchFile = '';
$this->ArchHnd = false;
$this->CdInfo = array();
$this->CdFileLst = array();
$this->CdFileNbr = 0;
$this->CdFileByName = array();
$this->VisFileLst = array();
$this->ArchCancelModif();
}
function ArchCancelModif() {
$this->LastReadComp = false; // compression of the last read file (1=compressed, 0=stored not compressed, -1= stored compressed but read uncompressed)
$this->LastReadIdx = false; // index of the last file read
$this->ReplInfo = array();
$this->ReplByPos = array();
$this->AddInfo = array();
}
function FileAdd($Name, $Data, $DataType=TBSZIP_STRING, $Compress=true) {
if ($Data===false) return $this->FileCancelModif($Name, false); // Cancel a previously added file
// Save information for adding a new file into the archive
$Diff = 30 + 46 + 2*strlen($Name); // size of the header + cd info
$Ref = $this->_DataCreateNewRef($Data, $DataType, $Compress, $Diff, $Name);
if ($Ref===false) return false;
$Ref['name'] = $Name;
$this->AddInfo[] = $Ref;
return $Ref['res'];
}
function CentralDirRead() {
$cd_info = 'PK'.chr(05).chr(06); // signature of the Central Directory
$cd_pos = -22;
$this->_MoveTo($cd_pos, SEEK_END);
$b = $this->_ReadData(4);
if ($b===$cd_info) {
$this->CdEndPos = ftell($this->ArchHnd) - 4;
} else {
$p = $this->_FindCDEnd($cd_info);
//echo 'p='.var_export($p,true); exit;
if ($p===false) {
return $this->RaiseError('The End of Central Directory Record is not found.');
} else {
$this->CdEndPos = $p;
$this->_MoveTo($p+4);
}
}
$this->CdInfo = $this->CentralDirRead_End($cd_info);
$this->CdFileLst = array();
$this->CdFileNbr = $this->CdInfo['file_nbr_curr'];
$this->CdPos = $this->CdInfo['p_cd'];
if ($this->CdFileNbr<=0) return $this->RaiseError('No header found in the Central Directory.');
if ($this->CdPos<=0) return $this->RaiseError('No position found for the Central Directory.');
$this->_MoveTo($this->CdPos);
for ($i=0;$i<$this->CdFileNbr;$i++) {
$x = $this->CentralDirRead_File($i);
if ($x!==false) {
$this->CdFileLst[$i] = $x;
$this->CdFileByName[$x['v_name']] = $i;
}
}
return true;
}
function CentralDirRead_End($cd_info) {
$b = $cd_info.$this->_ReadData(18);
$x = array();
$x['disk_num_curr'] = $this->_GetDec($b,4,2); // number of this disk
$x['disk_num_cd'] = $this->_GetDec($b,6,2); // number of the disk with the start of the central directory
$x['file_nbr_curr'] = $this->_GetDec($b,8,2); // total number of entries in the central directory on this disk
$x['file_nbr_tot'] = $this->_GetDec($b,10,2); // total number of entries in the central directory
$x['l_cd'] = $this->_GetDec($b,12,4); // size of the central directory
$x['p_cd'] = $this->_GetDec($b,16,4); // position of start of central directory with respect to the starting disk number
$x['l_comm'] = $this->_GetDec($b,20,2); // .ZIP file comment length
$x['v_comm'] = $this->_ReadData($x['l_comm']); // .ZIP file comment
$x['bin'] = $b.$x['v_comm'];
return $x;
}
function CentralDirRead_File($idx) {
$b = $this->_ReadData(46);
$x = $this->_GetHex($b,0,4);
if ($x!=='h:02014b50') return $this->RaiseError("Signature of Central Directory Header #".$idx." (file information) expected but not found at position ".$this->_TxtPos(ftell($this->ArchHnd) - 46).".");
$x = array();
$x['vers_used'] = $this->_GetDec($b,4,2);
$x['vers_necess'] = $this->_GetDec($b,6,2);
$x['purp'] = $this->_GetBin($b,8,2);
$x['meth'] = $this->_GetDec($b,10,2);
$x['time'] = $this->_GetDec($b,12,2);
$x['date'] = $this->_GetDec($b,14,2);
$x['crc32'] = $this->_GetDec($b,16,4);
$x['l_data_c'] = $this->_GetDec($b,20,4);
$x['l_data_u'] = $this->_GetDec($b,24,4);
$x['l_name'] = $this->_GetDec($b,28,2);
$x['l_fields'] = $this->_GetDec($b,30,2);
$x['l_comm'] = $this->_GetDec($b,32,2);
$x['disk_num'] = $this->_GetDec($b,34,2);
$x['int_file_att'] = $this->_GetDec($b,36,2);
$x['ext_file_att'] = $this->_GetDec($b,38,4);
$x['p_loc'] = $this->_GetDec($b,42,4);
$x['v_name'] = $this->_ReadData($x['l_name']);
$x['v_fields'] = $this->_ReadData($x['l_fields']);
$x['v_comm'] = $this->_ReadData($x['l_comm']);
$x['bin'] = $b.$x['v_name'].$x['v_fields'].$x['v_comm'];
return $x;
}
function RaiseError($Msg) {
if ($this->DisplayError) {
if (PHP_SAPI==='cli') {
echo get_class($this).' ERROR with the zip archive: '.$Msg."\r\n";
} else {
echo ''.get_class($this).' ERROR with the zip archive: '.$Msg.'
'."\r\n";
}
}
$this->Error = $Msg;
return false;
}
function Debug($FileHeaders=false) {
$this->DisplayError = true;
if ($FileHeaders) {
// Calculations first in order to have error messages before other information
$idx = 0;
$pos = 0;
$pos_stop = $this->CdInfo['p_cd'];
$this->_MoveTo($pos);
while ( ($pos<$pos_stop) && ($ok = $this->_ReadFile($idx,false)) ) {
$this->VisFileLst[$idx]['p_this_header (debug_mode only)'] = $pos;
$pos = ftell($this->ArchHnd);
$idx++;
}
}
$nl = "\r\n";
echo "";
echo "-------------------------------".$nl;
echo "End of Central Directory record".$nl;
echo "-------------------------------".$nl;
print_r($this->DebugArray($this->CdInfo));
echo $nl;
echo "-------------------------".$nl;
echo "Central Directory headers".$nl;
echo "-------------------------".$nl;
print_r($this->DebugArray($this->CdFileLst));
if ($FileHeaders) {
echo $nl;
echo "------------------".$nl;
echo "Local File headers".$nl;
echo "------------------".$nl;
print_r($this->DebugArray($this->VisFileLst));
}
echo "";
}
function DebugArray($arr) {
foreach ($arr as $k=>$v) {
if (is_array($v)) {
$arr[$k] = $this->DebugArray($v);
} elseif (substr($k,0,2)=='p_') {
$arr[$k] = $this->_TxtPos($v);
}
}
return $arr;
}
function FileExists($NameOrIdx) {
return ($this->FileGetIdx($NameOrIdx)!==false);
}
function FileGetIdx($NameOrIdx) {
// Check if a file name, or a file index exists in the Central Directory, and return its index
if (is_string($NameOrIdx)) {
if (isset($this->CdFileByName[$NameOrIdx])) {
return $this->CdFileByName[$NameOrIdx];
} else {
return false;
}
} else {
if (isset($this->CdFileLst[$NameOrIdx])) {
return $NameOrIdx;
} else {
return false;
}
}
}
function FileGetIdxAdd($Name) {
// Check if a file name exists in the list of file to add, and return its index
if (!is_string($Name)) return false;
$idx_lst = array_keys($this->AddInfo);
foreach ($idx_lst as $idx) {
if ($this->AddInfo[$idx]['name']===$Name) return $idx;
}
return false;
}
function FileRead($NameOrIdx, $Uncompress=true) {
$this->LastReadComp = false; // means the file is not found
$this->LastReadIdx = false;
$idx = $this->FileGetIdx($NameOrIdx);
if ($idx===false) return $this->RaiseError('File "'.$NameOrIdx.'" is not found in the Central Directory.');
$pos = $this->CdFileLst[$idx]['p_loc'];
$this->_MoveTo($pos);
$this->LastReadIdx = $idx; // Can be usefull to get the idx
$Data = $this->_ReadFile($idx, true);
// Manage uncompression
$Comp = 1; // means the contents stays compressed
$meth = $this->CdFileLst[$idx]['meth'];
if ($meth==8) {
if ($Uncompress) {
if ($this->Meth8Ok) {
$Data = gzinflate($Data);
$Comp = -1; // means uncompressed
} else {
$this->RaiseError('Unable to uncompress file "'.$NameOrIdx.'" because extension Zlib is not installed.');
}
}
} elseif($meth==0) {
$Comp = 0; // means stored without compression
} else {
if ($Uncompress) $this->RaiseError('Unable to uncompress file "'.$NameOrIdx.'" because it is compressed with method '.$meth.'.');
}
$this->LastReadComp = $Comp;
return $Data;
}
function _ReadFile($idx, $ReadData) {
// read the file header (and maybe the data ) in the archive, assuming the cursor in at a new file position
$b = $this->_ReadData(30);
$x = $this->_GetHex($b,0,4);
if ($x!=='h:04034b50') return $this->RaiseError("Signature of Local File Header #".$idx." (data section) expected but not found at position ".$this->_TxtPos(ftell($this->ArchHnd)-30).".");
$x = array();
$x['vers'] = $this->_GetDec($b,4,2);
$x['purp'] = $this->_GetBin($b,6,2);
$x['meth'] = $this->_GetDec($b,8,2);
$x['time'] = $this->_GetDec($b,10,2);
$x['date'] = $this->_GetDec($b,12,2);
$x['crc32'] = $this->_GetDec($b,14,4);
$x['l_data_c'] = $this->_GetDec($b,18,4);
$x['l_data_u'] = $this->_GetDec($b,22,4);
$x['l_name'] = $this->_GetDec($b,26,2);
$x['l_fields'] = $this->_GetDec($b,28,2);
$x['v_name'] = $this->_ReadData($x['l_name']);
$x['v_fields'] = $this->_ReadData($x['l_fields']);
$x['bin'] = $b.$x['v_name'].$x['v_fields'];
// Read Data
if (isset($this->CdFileLst[$idx])) {
$len_cd = $this->CdFileLst[$idx]['l_data_c'];
if ($x['l_data_c']==0) {
// Sometimes, the size is not specified in the local information.
$len = $len_cd;
} else {
$len = $x['l_data_c'];
if ($len!=$len_cd) {
//echo "TbsZip Warning: Local information for file #".$idx." says len=".$len.", while Central Directory says len=".$len_cd.".";
}
}
} else {
$len = $x['l_data_c'];
if ($len==0) $this->RaiseError("File Data #".$idx." cannt be read because no length is specified in the Local File Header and its Central Directory information has not been found.");
}
if ($ReadData) {
$Data = $this->_ReadData($len);
} else {
$this->_MoveTo($len, SEEK_CUR);
}
// Description information
$desc_ok = ($x['purp'][2+3]=='1');
if ($desc_ok) {
$b = $this->_ReadData(12);
$s = $this->_GetHex($b,0,4);
$d = 0;
// the specification says the signature may or may not be present
if ($s=='h:08074b50') {
$b .= $this->_ReadData(4);
$d = 4;
$x['desc_bin'] = $b;
$x['desc_sign'] = $s;
} else {
$x['desc_bin'] = $b;
}
$x['desc_crc32'] = $this->_GetDec($b,0+$d,4);
$x['desc_l_data_c'] = $this->_GetDec($b,4+$d,4);
$x['desc_l_data_u'] = $this->_GetDec($b,8+$d,4);
}
// Save file info without the data
$this->VisFileLst[$idx] = $x;
// Return the info
if ($ReadData) {
return $Data;
} else {
return true;
}
}
function FileReplace($NameOrIdx, $Data, $DataType=TBSZIP_STRING, $Compress=true) {
// Store replacement information.
$idx = $this->FileGetIdx($NameOrIdx);
if ($idx===false) return $this->RaiseError('File "'.$NameOrIdx.'" is not found in the Central Directory.');
$pos = $this->CdFileLst[$idx]['p_loc'];
if ($Data===false) {
// file to delete
$this->ReplInfo[$idx] = false;
$Result = true;
} else {
// file to replace
$Diff = - $this->CdFileLst[$idx]['l_data_c'];
$Ref = $this->_DataCreateNewRef($Data, $DataType, $Compress, $Diff, $NameOrIdx);
if ($Ref===false) return false;
$this->ReplInfo[$idx] = $Ref;
$Result = $Ref['res'];
}
$this->ReplByPos[$pos] = $idx;
return $Result;
}
/**
* Return the state of the file.
* @return {string} 'u'=unchanged, 'm'=modified, 'd'=deleted, 'a'=added, false=unknown
*/
function FileGetState($NameOrIdx) {
$idx = $this->FileGetIdx($NameOrIdx);
if ($idx===false) {
$idx = $this->FileGetIdxAdd($NameOrIdx);
if ($idx===false) {
return false;
} else {
return 'a';
}
} elseif (isset($this->ReplInfo[$idx])) {
if ($this->ReplInfo[$idx]===false) {
return 'd';
} else {
return 'm';
}
} else {
return 'u';
}
}
function FileCancelModif($NameOrIdx, $ReplacedAndDeleted=true) {
// cancel added, modified or deleted modifications on a file in the archive
// return the number of cancels
$nbr = 0;
if ($ReplacedAndDeleted) {
// replaced or deleted files
$idx = $this->FileGetIdx($NameOrIdx);
if ($idx!==false) {
if (isset($this->ReplInfo[$idx])) {
$pos = $this->CdFileLst[$idx]['p_loc'];
unset($this->ReplByPos[$pos]);
unset($this->ReplInfo[$idx]);
$nbr++;
}
}
}
// added files
$idx = $this->FileGetIdxAdd($NameOrIdx);
if ($idx!==false) {
unset($this->AddInfo[$idx]);
$nbr++;
}
return $nbr;
}
function Flush($Render=TBSZIP_DOWNLOAD, $File='', $ContentType='') {
if ( ($File!=='') && ($this->ArchFile===$File)) {
$this->RaiseError('Method Flush() cannot overwrite the current opened archive: \''.$File.'\''); // this makes corrupted zip archives without PHP error.
return false;
}
$ArchPos = 0;
$Delta = 0;
$FicNewPos = array();
$DelLst = array(); // idx of deleted files
$DeltaCdLen = 0; // delta of the CD's size
$now = time();
$date = $this->_MsDos_Date($now);
$time = $this->_MsDos_Time($now);
if (!$this->OutputOpen($Render, $File, $ContentType)) return false;
// output modified zipped files and unmodified zipped files that are beetween them
ksort($this->ReplByPos);
foreach ($this->ReplByPos as $ReplPos => $ReplIdx) {
// output data from the zip archive which is before the data to replace
$this->OutputFromArch($ArchPos, $ReplPos);
// get current file information
if (!isset($this->VisFileLst[$ReplIdx])) $this->_ReadFile($ReplIdx, false);
$FileInfo =& $this->VisFileLst[$ReplIdx];
$b1 = $FileInfo['bin'];
if (isset($FileInfo['desc_bin'])) {
$b2 = $FileInfo['desc_bin'];
} else {
$b2 = '';
}
$info_old_len = strlen($b1) + $this->CdFileLst[$ReplIdx]['l_data_c'] + strlen($b2); // $FileInfo['l_data_c'] may have a 0 value in some archives
// get replacement information
$ReplInfo =& $this->ReplInfo[$ReplIdx];
if ($ReplInfo===false) {
// The file is to be deleted
$Delta = $Delta - $info_old_len; // headers and footers are also deleted
$DelLst[$ReplIdx] = true;
} else {
// prepare the header of the current file
$this->_DataPrepare($ReplInfo); // get data from external file if necessary
$this->_PutDec($b1, $time, 10, 2); // time
$this->_PutDec($b1, $date, 12, 2); // date
$this->_PutDec($b1, $ReplInfo['crc32'], 14, 4); // crc32
$this->_PutDec($b1, $ReplInfo['len_c'], 18, 4); // l_data_c
$this->_PutDec($b1, $ReplInfo['len_u'], 22, 4); // l_data_u
if ($ReplInfo['meth']!==false) $this->_PutDec($b1, $ReplInfo['meth'], 8, 2); // meth
// prepare the bottom description if the zipped file, if any
if ($b2!=='') {
$d = (strlen($b2)==16) ? 4 : 0; // offset because of the signature if any
$this->_PutDec($b2, $ReplInfo['crc32'], $d+0, 4); // crc32
$this->_PutDec($b2, $ReplInfo['len_c'], $d+4, 4); // l_data_c
$this->_PutDec($b2, $ReplInfo['len_u'], $d+8, 4); // l_data_u
}
// output data
$this->OutputFromString($b1.$ReplInfo['data'].$b2);
unset($ReplInfo['data']); // save PHP memory
$Delta = $Delta + $ReplInfo['diff'] + $ReplInfo['len_c'];
}
// Update the delta of positions for zipped files which are physically after the currently replaced one
for ($i=0;$i<$this->CdFileNbr;$i++) {
if ($this->CdFileLst[$i]['p_loc']>$ReplPos) {
$FicNewPos[$i] = $this->CdFileLst[$i]['p_loc'] + $Delta;
}
}
// Update the current pos in the archive
$ArchPos = $ReplPos + $info_old_len;
}
// Ouput all the zipped files that remain before the Central Directory listing
if ($this->ArchHnd!==false) $this->OutputFromArch($ArchPos, $this->CdPos); // ArchHnd is false if CreateNew() has been called
$ArchPos = $this->CdPos;
// Output file to add
$AddNbr = count($this->AddInfo);
$AddDataLen = 0; // total len of added data (inlcuding file headers)
if ($AddNbr>0) {
$AddPos = $ArchPos + $Delta; // position of the start
$AddLst = array_keys($this->AddInfo);
foreach ($AddLst as $idx) {
$n = $this->_DataOuputAddedFile($idx, $AddPos);
$AddPos += $n;
$AddDataLen += $n;
}
}
// Modifiy file information in the Central Directory for replaced files
$b2 = '';
$old_cd_len = 0;
for ($i=0;$i<$this->CdFileNbr;$i++) {
$b1 = $this->CdFileLst[$i]['bin'];
$old_cd_len += strlen($b1);
if (!isset($DelLst[$i])) {
if (isset($FicNewPos[$i])) $this->_PutDec($b1, $FicNewPos[$i], 42, 4); // p_loc
if (isset($this->ReplInfo[$i])) {
$ReplInfo =& $this->ReplInfo[$i];
$this->_PutDec($b1, $time, 12, 2); // time
$this->_PutDec($b1, $date, 14, 2); // date
$this->_PutDec($b1, $ReplInfo['crc32'], 16, 4); // crc32
$this->_PutDec($b1, $ReplInfo['len_c'], 20, 4); // l_data_c
$this->_PutDec($b1, $ReplInfo['len_u'], 24, 4); // l_data_u
if ($ReplInfo['meth']!==false) $this->_PutDec($b1, $ReplInfo['meth'], 10, 2); // meth
}
$b2 .= $b1;
}
}
$this->OutputFromString($b2);
$ArchPos += $old_cd_len;
$DeltaCdLen = $DeltaCdLen + strlen($b2) - $old_cd_len;
// Output until "end of central directory record"
if ($this->ArchHnd!==false) $this->OutputFromArch($ArchPos, $this->CdEndPos); // ArchHnd is false if CreateNew() has been called
// Output file information of the Central Directory for added files
if ($AddNbr>0) {
$b2 = '';
foreach ($AddLst as $idx) {
$b2 .= $this->AddInfo[$idx]['bin'];
}
$this->OutputFromString($b2);
$DeltaCdLen += strlen($b2);
}
// Output "end of central directory record"
$b2 = $this->CdInfo['bin'];
$DelNbr = count($DelLst);
if ( ($AddNbr>0) or ($DelNbr>0) ) {
// total number of entries in the central directory on this disk
$n = $this->_GetDec($b2, 8, 2);
$this->_PutDec($b2, $n + $AddNbr - $DelNbr, 8, 2);
// total number of entries in the central directory
$n = $this->_GetDec($b2, 10, 2);
$this->_PutDec($b2, $n + $AddNbr - $DelNbr, 10, 2);
// size of the central directory
$n = $this->_GetDec($b2, 12, 4);
$this->_PutDec($b2, $n + $DeltaCdLen, 12, 4);
$Delta = $Delta + $AddDataLen;
}
$this->_PutDec($b2, $this->CdPos+$Delta , 16, 4); // p_cd (offset of start of central directory with respect to the starting disk number)
$this->OutputFromString($b2);
$this->OutputClose();
return true;
}
// ----------------
// output functions
// ----------------
function OutputOpen($Render, $File, $ContentType) {
if (($Render & TBSZIP_FILE)==TBSZIP_FILE) {
$this->OutputMode = TBSZIP_FILE;
if (''.$File=='') $File = basename($this->ArchFile).'.zip';
$this->OutputHandle = @fopen($File, 'w');
if ($this->OutputHandle===false) {
return $this->RaiseError('Method Flush() cannot overwrite the target file \''.$File.'\'. This may not be a valid file path or the file may be locked by another process or because of a denied permission.');
}
} elseif (($Render & TBSZIP_STRING)==TBSZIP_STRING) {
$this->OutputMode = TBSZIP_STRING;
$this->OutputSrc = '';
} elseif (($Render & TBSZIP_DOWNLOAD)==TBSZIP_DOWNLOAD) {
$this->OutputMode = TBSZIP_DOWNLOAD;
// Output the file
if (''.$File=='') $File = basename($this->ArchFile);
if (($Render & TBSZIP_NOHEADER)==TBSZIP_NOHEADER) {
} else {
header ('Pragma: no-cache');
if ($ContentType!='') header ('Content-Type: '.$ContentType);
if (strlen($File) != strlen(utf8_decode($File))) {
header('Content-Disposition: attachment; filename="book.epub"; filename*=utf-8\'\'' . rawurlencode($File));
} else {
header('Content-Disposition: attachment; filename="'.$File.'"');
}
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Cache-Control: public');
header('Content-Description: File Transfer');
header('Content-Transfer-Encoding: binary');
$Len = $this->_EstimateNewArchSize();
if ($Len!==false) header('Content-Length: '.$Len);
}
} else {
return $this->RaiseError('Method Flush is called with a unsupported render option.');
}
return true;
}
function OutputFromArch($pos, $pos_stop) {
$len = $pos_stop - $pos;
if ($len<0) return;
$this->_MoveTo($pos);
$block = 1024;
while ($len>0) {
$l = min($len, $block);
$x = $this->_ReadData($l);
$this->OutputFromString($x);
$len = $len - $l;
}
unset($x);
}
function OutputFromString($data) {
if ($this->OutputMode===TBSZIP_DOWNLOAD) {
echo $data; // donwload
} elseif ($this->OutputMode===TBSZIP_STRING) {
$this->OutputSrc .= $data; // to string
} elseif (TBSZIP_FILE) {
fwrite($this->OutputHandle, $data); // to file
}
}
function OutputClose() {
if ( ($this->OutputMode===TBSZIP_FILE) && ($this->OutputHandle!==false) ) {
fclose($this->OutputHandle);
$this->OutputHandle = false;
}
}
// ----------------
// Reading functions
// ----------------
function _MoveTo($pos, $relative = SEEK_SET) {
fseek($this->ArchHnd, $pos, $relative);
}
function _ReadData($len) {
if ($len>0) {
$x = fread($this->ArchHnd, $len);
return $x;
} else {
return '';
}
}
// ----------------
// Take info from binary data
// ----------------
function _GetDec($txt, $pos, $len) {
$x = substr($txt, $pos, $len);
$z = 0;
for ($i=0;$i<$len;$i++) {
$asc = ord($x[$i]);
if ($asc>0) $z = $z + $asc*pow(256,$i);
}
return $z;
}
function _GetHex($txt, $pos, $len) {
$x = substr($txt, $pos, $len);
return 'h:'.bin2hex(strrev($x));
}
function _GetBin($txt, $pos, $len) {
$x = substr($txt, $pos, $len);
$z = '';
for ($i=0;$i<$len;$i++) {
$asc = ord($x[$i]);
if (isset($x[$i])) {
for ($j=0;$j<8;$j++) {
$z .= ($asc & pow(2,$j)) ? '1' : '0';
}
} else {
$z .= '00000000';
}
}
return 'b:'.$z;
}
// ----------------
// Put info into binary data
// ----------------
function _PutDec(&$txt, $val, $pos, $len) {
$x = '';
for ($i=0;$i<$len;$i++) {
if ($val==0) {
$z = 0;
} else {
$z = intval($val % 256);
if (($val<0) && ($z!=0)) { // ($z!=0) is very important, example: val=-420085702
// special opration for negative value. If the number id too big, PHP stores it into a signed integer. For example: crc32('coucou') => -256185401 instead of 4038781895. NegVal = BigVal - (MaxVal+1) = BigVal - 256^4
$val = ($val - $z)/256 -1;
$z = 256 + $z;
} else {
$val = ($val - $z)/256;
}
}
$x .= chr($z);
}
$txt = substr_replace($txt, $x, $pos, $len);
}
function _MsDos_Date($Timestamp = false) {
// convert a date-time timstamp into the MS-Dos format
$d = ($Timestamp===false) ? getdate() : getdate($Timestamp);
return (($d['year']-1980)*512) + ($d['mon']*32) + $d['mday'];
}
function _MsDos_Time($Timestamp = false) {
// convert a date-time timstamp into the MS-Dos format
$d = ($Timestamp===false) ? getdate() : getdate($Timestamp);
return ($d['hours']*2048) + ($d['minutes']*32) + intval($d['seconds']/2); // seconds are rounded to an even number in order to save 1 bit
}
function _MsDos_Debug($date, $time) {
// Display the formated date and time. Just for debug purpose.
// date end time are encoded on 16 bits (2 bytes) : date = yyyyyyymmmmddddd , time = hhhhhnnnnnssssss
$y = ($date & 65024)/512 + 1980;
$m = ($date & 480)/32;
$d = ($date & 31);
$h = ($time & 63488)/2048;
$i = ($time & 1984)/32;
$s = ($time & 31) * 2; // seconds have been rounded to an even number in order to save 1 bit
return $y.'-'.str_pad($m,2,'0',STR_PAD_LEFT).'-'.str_pad($d,2,'0',STR_PAD_LEFT).' '.str_pad($h,2,'0',STR_PAD_LEFT).':'.str_pad($i,2,'0',STR_PAD_LEFT).':'.str_pad($s,2,'0',STR_PAD_LEFT);
}
function _TxtPos($pos) {
// Return the human readable position in both decimal and hexa
return $pos." (h:".dechex($pos).")";
}
/**
* Search the record of end of the Central Directory.
* Return the position of the record in the file.
* Return false if the record is not found. The comment cannot exceed 65335 bytes (=FFFF).
* The method is read backwards a block of 256 bytes and search the key in this block.
*/
function _FindCDEnd($cd_info) {
$nbr = 1;
$p = false;
$pos = ftell($this->ArchHnd) - 4 - 256;
while ( ($p===false) && ($nbr<256) ) {
if ($pos<=0) {
$pos = 0;
$nbr = 256; // in order to make this a last check
}
$this->_MoveTo($pos);
$x = $this->_ReadData(256);
$p = strpos($x, $cd_info);
if ($p===false) {
$nbr++;
$pos = $pos - 256 - 256;
} else {
return $pos + $p;
}
}
return false;
}
function _DataOuputAddedFile($Idx, $PosLoc) {
$Ref =& $this->AddInfo[$Idx];
$this->_DataPrepare($Ref); // get data from external file if necessary
// Other info
$now = time();
$date = $this->_MsDos_Date($now);
$time = $this->_MsDos_Time($now);
$len_n = strlen($Ref['name']);
$purp = 2048 ; // purpose // +8 to indicates that there is an extended local header
// Header for file in the data section
$b = 'PK'.chr(03).chr(04).str_repeat(' ',26); // signature
$this->_PutDec($b,20,4,2); //vers = 20
$this->_PutDec($b,$purp,6,2); // purp
$this->_PutDec($b,$Ref['meth'],8,2); // meth
$this->_PutDec($b,$time,10,2); // time
$this->_PutDec($b,$date,12,2); // date
$this->_PutDec($b,$Ref['crc32'],14,4); // crc32
$this->_PutDec($b,$Ref['len_c'],18,4); // l_data_c
$this->_PutDec($b,$Ref['len_u'],22,4); // l_data_u
$this->_PutDec($b,$len_n,26,2); // l_name
$this->_PutDec($b,0,28,2); // l_fields
$b .= $Ref['name']; // name
$b .= ''; // fields
// Output the data
$this->OutputFromString($b.$Ref['data']);
$OutputLen = strlen($b) + $Ref['len_c']; // new position of the cursor
unset($Ref['data']); // save PHP memory
// Information for file in the Central Directory
$b = 'PK'.chr(01).chr(02).str_repeat(' ',42); // signature
$this->_PutDec($b,20,4,2); // vers_used = 20
$this->_PutDec($b,20,6,2); // vers_necess = 20
$this->_PutDec($b,$purp,8,2); // purp
$this->_PutDec($b,$Ref['meth'],10,2); // meth
$this->_PutDec($b,$time,12,2); // time
$this->_PutDec($b,$date,14,2); // date
$this->_PutDec($b,$Ref['crc32'],16,4); // crc32
$this->_PutDec($b,$Ref['len_c'],20,4); // l_data_c
$this->_PutDec($b,$Ref['len_u'],24,4); // l_data_u
$this->_PutDec($b,$len_n,28,2); // l_name
$this->_PutDec($b,0,30,2); // l_fields
$this->_PutDec($b,0,32,2); // l_comm
$this->_PutDec($b,0,34,2); // disk_num
$this->_PutDec($b,0,36,2); // int_file_att
$this->_PutDec($b,0,38,4); // ext_file_att
$this->_PutDec($b,$PosLoc,42,4); // p_loc
$b .= $Ref['name']; // v_name
$b .= ''; // v_fields
$b .= ''; // v_comm
$Ref['bin'] = $b;
return $OutputLen;
}
function _DataCreateNewRef($Data, $DataType, $Compress, $Diff, $NameOrIdx) {
if (is_array($Compress)) {
$result = 2;
$meth = $Compress['meth'];
$len_u = $Compress['len_u'];
$crc32 = $Compress['crc32'];
$Compress = false;
} elseif ($Compress and ($this->Meth8Ok)) {
$result = 1;
$meth = 8;
$len_u = false; // means unknown
$crc32 = false;
} else {
$result = ($Compress) ? -1 : 0;
$meth = 0;
$len_u = false;
$crc32 = false;
$Compress = false;
}
if ($DataType==TBSZIP_STRING) {
$path = false;
if ($Compress) {
// we compress now in order to save PHP memory
$len_u = strlen($Data);
$crc32 = crc32($Data);
$Data = gzdeflate($Data);
$len_c = strlen($Data);
} else {
$len_c = strlen($Data);
if ($len_u===false) {
$len_u = $len_c;
$crc32 = crc32($Data);
}
}
} else {
$path = $Data;
$Data = false;
if (file_exists($path)) {
$fz = filesize($path);
if ($len_u===false) $len_u = $fz;
$len_c = ($Compress) ? false : $fz;
} else {
return $this->RaiseError("Cannot add the file '".$path."' because it is not found.");
}
}
// at this step $Data and $crc32 can be false only in case of external file, and $len_c is false only in case of external file to compress
return array('data'=>$Data, 'path'=>$path, 'meth'=>$meth, 'len_u'=>$len_u, 'len_c'=>$len_c, 'crc32'=>$crc32, 'diff'=>$Diff, 'res'=>$result);
}
function _DataPrepare(&$Ref) {
// returns the real size of data
if ($Ref['path']!==false) {
$Ref['data'] = file_get_contents($Ref['path']);
if ($Ref['crc32']===false) $Ref['crc32'] = crc32($Ref['data']);
if ($Ref['len_c']===false) {
// means the data must be compressed
$Ref['data'] = gzdeflate($Ref['data']);
$Ref['len_c'] = strlen($Ref['data']);
}
}
}
function _EstimateNewArchSize($Optim=true) {
// Return the size of the new archive, or false if it cannot be calculated (because of external file that must be compressed before to be insered)
if ($this->ArchIsNew) {
$Len = strlen($this->CdInfo['bin']);
} elseif ($this->ArchIsStream) {
$x = fstat($this->ArchHnd);
$Len = $x['size'];
} else {
$Len = filesize($this->ArchFile);
}
// files to replace or delete
foreach ($this->ReplByPos as $i) {
$Ref =& $this->ReplInfo[$i];
if ($Ref===false) {
// file to delete
$Info =& $this->CdFileLst[$i];
if (!isset($this->VisFileLst[$i])) {
if ($Optim) return false; // if $Optimization is set to true, then we d'ont rewind to read information
$this->_MoveTo($Info['p_loc']);
$this->_ReadFile($i, false);
}
$Vis =& $this->VisFileLst[$i];
$Len += -strlen($Vis['bin']) -strlen($Info['bin']) - $Info['l_data_c'];
if (isset($Vis['desc_bin'])) $Len += -strlen($Vis['desc_bin']);
} elseif ($Ref['len_c']===false) {
return false; // information not yet known
} else {
// file to replace
$Len += $Ref['len_c'] + $Ref['diff'];
}
}
// files to add
$i_lst = array_keys($this->AddInfo);
foreach ($i_lst as $i) {
$Ref =& $this->AddInfo[$i];
if ($Ref['len_c']===false) {
return false; // information not yet known
} else {
$Len += $Ref['len_c'] + $Ref['diff'];
}
}
return $Len;
}
}