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-rw-r--r--includes/Cdb_PHP.php69
1 files changed, 49 insertions, 20 deletions
diff --git a/includes/Cdb_PHP.php b/includes/Cdb_PHP.php
index f4029ba5..53175272 100644
--- a/includes/Cdb_PHP.php
+++ b/includes/Cdb_PHP.php
@@ -1,6 +1,6 @@
<?php
/**
- * This is a port of D.J. Bernstein's CDB to PHP. It's based on the copy that
+ * This is a port of D.J. Bernstein's CDB to PHP. It's based on the copy that
* appears in PHP 5.3. Changes are:
* * Error returns replaced with exceptions
* * Exception thrown if sizes or offsets are between 2GB and 4GB
@@ -50,7 +50,7 @@ class CdbFunctions {
/**
* The CDB hash function.
- *
+ *
* @param $s
*
* @return
@@ -62,7 +62,7 @@ class CdbFunctions {
// Do a 32-bit sum
// Inlined here for speed
$sum = ($h & 0x3fffffff) + ($h5 & 0x3fffffff);
- $h =
+ $h =
(
( $sum & 0x40000000 ? 1 : 0 )
+ ( $h & 0x80000000 ? 2 : 0 )
@@ -82,6 +82,9 @@ class CdbFunctions {
* CDB reader class
*/
class CdbReader_PHP extends CdbReader {
+ /** The filename */
+ var $fileName;
+
/** The file handle */
var $handle;
@@ -104,12 +107,16 @@ class CdbReader_PHP extends CdbReader {
var $dpos;
/* initialized if cdb_findnext() returns 1 */
- var $dlen;
+ var $dlen;
+ /**
+ * @param $fileName string
+ */
function __construct( $fileName ) {
+ $this->fileName = $fileName;
$this->handle = fopen( $fileName, 'rb' );
if ( !$this->handle ) {
- throw new MWException( 'Unable to open CDB file "' . $fileName . '"' );
+ throw new MWException( 'Unable to open CDB file "' . $this->fileName . '".' );
}
$this->findStart();
}
@@ -157,7 +164,8 @@ class CdbReader_PHP extends CdbReader {
protected function read( $length, $pos ) {
if ( fseek( $this->handle, $pos ) == -1 ) {
// This can easily happen if the internal pointers are incorrect
- throw new MWException( __METHOD__.': seek failed, file may be corrupted.' );
+ throw new MWException(
+ 'Seek failed, file "' . $this->fileName . '" may be corrupted.' );
}
if ( $length == 0 ) {
@@ -166,7 +174,8 @@ class CdbReader_PHP extends CdbReader {
$buf = fread( $this->handle, $length );
if ( $buf === false || strlen( $buf ) !== $length ) {
- throw new MWException( __METHOD__.': read from CDB file failed, file may be corrupted' );
+ throw new MWException(
+ 'Read from CDB file failed, file "' . $this->fileName . '" may be corrupted.' );
}
return $buf;
}
@@ -179,7 +188,8 @@ class CdbReader_PHP extends CdbReader {
protected function unpack31( $s ) {
$data = unpack( 'V', $s );
if ( $data[1] > 0x7fffffff ) {
- throw new MWException( __METHOD__.': error in CDB file, integer too big' );
+ throw new MWException(
+ 'Error in CDB file "' . $this->fileName . '", integer too big.' );
}
return $data[1];
}
@@ -257,20 +267,24 @@ class CdbWriter_PHP extends CdbWriter {
var $handle, $realFileName, $tmpFileName;
var $hplist;
- var $numEntries, $pos;
+ var $numentries, $pos;
+ /**
+ * @param $fileName string
+ */
function __construct( $fileName ) {
$this->realFileName = $fileName;
$this->tmpFileName = $fileName . '.tmp.' . mt_rand( 0, 0x7fffffff );
$this->handle = fopen( $this->tmpFileName, 'wb' );
if ( !$this->handle ) {
- throw new MWException( 'Unable to open CDB file for write "' . $fileName . '"' );
+ $this->throwException(
+ 'Unable to open CDB file "' . $this->tmpFileName . '" for write.' );
}
$this->hplist = array();
$this->numentries = 0;
$this->pos = 2048; // leaving space for the pointer array, 256 * 8
if ( fseek( $this->handle, $this->pos ) == -1 ) {
- throw new MWException( __METHOD__.': fseek failed' );
+ $this->throwException( 'fseek failed in file "' . $this->tmpFileName . '".' );
}
}
@@ -308,7 +322,7 @@ class CdbWriter_PHP extends CdbWriter {
unlink( $this->realFileName );
}
if ( !rename( $this->tmpFileName, $this->realFileName ) ) {
- throw new MWException( 'Unable to move the new CDB file into place.' );
+ $this->throwException( 'Unable to move the new CDB file into place.' );
}
unset( $this->handle );
}
@@ -320,7 +334,7 @@ class CdbWriter_PHP extends CdbWriter {
protected function write( $buf ) {
$len = fwrite( $this->handle, $buf );
if ( $len !== strlen( $buf ) ) {
- throw new MWException( 'Error writing to CDB file.' );
+ $this->throwException( 'Error writing to CDB file "'.$this->tmpFileName.'".' );
}
}
@@ -331,7 +345,8 @@ class CdbWriter_PHP extends CdbWriter {
protected function posplus( $len ) {
$newpos = $this->pos + $len;
if ( $newpos > 0x7fffffff ) {
- throw new MWException( 'A value in the CDB file is too large' );
+ $this->throwException(
+ 'A value in the CDB file "'.$this->tmpFileName.'" is too large.' );
}
$this->pos = $newpos;
}
@@ -360,10 +375,10 @@ class CdbWriter_PHP extends CdbWriter {
*/
protected function addbegin( $keylen, $datalen ) {
if ( $keylen > 0x7fffffff ) {
- throw new MWException( __METHOD__.': key length too long' );
+ $this->throwException( 'Key length too long in file "'.$this->tmpFileName.'".' );
}
if ( $datalen > 0x7fffffff ) {
- throw new MWException( __METHOD__.': data length too long' );
+ $this->throwException( 'Data length too long in file "'.$this->tmpFileName.'".' );
}
$buf = pack( 'VV', $keylen, $datalen );
$this->write( $buf );
@@ -391,7 +406,7 @@ class CdbWriter_PHP extends CdbWriter {
}
// Excessively clever and indulgent code to simultaneously fill $packedTables
- // with the packed hashtables, and adjust the elements of $starts
+ // with the packed hashtables, and adjust the elements of $starts
// to actually point to the starts instead of the ends.
$packedTables = array_fill( 0, $this->numentries, false );
foreach ( $this->hplist as $item ) {
@@ -416,7 +431,7 @@ class CdbWriter_PHP extends CdbWriter {
// is taken.
for ( $u = 0; $u < $count; ++$u ) {
$hp = $packedTables[$starts[$i] + $u];
- $where = CdbFunctions::unsignedMod(
+ $where = CdbFunctions::unsignedMod(
CdbFunctions::unsignedShiftRight( $hp['h'], 8 ), $len );
while ( $hashtable[$where]['p'] )
if ( ++$where == $len )
@@ -426,7 +441,7 @@ class CdbWriter_PHP extends CdbWriter {
// Write the hashtable
for ( $u = 0; $u < $len; ++$u ) {
- $buf = pack( 'vvV',
+ $buf = pack( 'vvV',
$hashtable[$u]['h'] & 0xffff,
CdbFunctions::unsignedShiftRight( $hashtable[$u]['h'], 16 ),
$hashtable[$u]['p'] );
@@ -438,8 +453,22 @@ class CdbWriter_PHP extends CdbWriter {
// Write the pointer array at the start of the file
rewind( $this->handle );
if ( ftell( $this->handle ) != 0 ) {
- throw new MWException( __METHOD__.': Error rewinding to start of file' );
+ $this->throwException( 'Error rewinding to start of file "'.$this->tmpFileName.'".' );
}
$this->write( $final );
}
+
+ /**
+ * Clean up the temp file and throw an exception
+ *
+ * @param $msg string
+ * @throws MWException
+ */
+ protected function throwException( $msg ) {
+ if ( $this->handle ) {
+ fclose( $this->handle );
+ unlink( $this->tmpFileName );
+ }
+ throw new MWException( $msg );
+ }
}
generated by cgit v1.2.2 (git 2.25.0) at 2024-04-18 07:20:06 +0000