+function sqimap_fread($imap_stream,$iSize,$filter=false,
+ $outputstream=false, $no_return=false) {
+ if (!$filter || !$outputstream) {
+ $iBufferSize = $iSize;
+ } else {
+ $iBufferSize = 62400; // multiple of 78 in case of base64 decoding.
+ }
+ $iRet = $iSize - $iBufferSize;
+ $iRetrieved = 0;
+ $i = 0;
+ $results = $sReadRem = '';
+ $bFinished = $bBufferSizeAdapted = $bBufferIsOk = false;
+ while (($iRetrieved < ($iSize - $iBufferSize))) {
+ $sRead = fread($imap_stream,$iBufferSize);
+ if (!$sRead) {
+ $results = false;
+ break;
+ }
+ $iRetrieved += $iBufferSize;
+ if ($filter) {
+ // in case line-endings do not appear at position 78 we adapt the buffersize so we can base64 decode on the fly
+ if (!$bBufferSizeAdapted) {
+ $i = strpos($sRead,"\n");
+ if ($i) {
+ ++$i;
+ $iFragments = floor($iBufferSize / $i);
+ $iNewBufferSize = $iFragments * $i;
+ $iRemainder = $iNewBufferSize + $i - $iBufferSize;
+ if ($iNewBufferSize == $iBufferSize) {
+ $bBufferIsOk = true;
+ $iRemainder = 0;
+ $iNewBufferSize = $iBufferSize;
+ $bBufferSizeAdapted = true;
+ }
+ if (!$bBufferIsOk && ($iRemainder + $iBufferSize) < $iSize) {
+ $sReadRem = fread($imap_stream,$iRemainder);
+ } else if (!$bBufferIsOk) {
+ $sReadRem = fread($imap_stream,$iSize - $iBufferSize);
+ $bFinished = true;
+ }
+ if (!$sReadRem && $sReadRem !== '') {
+ $results = false;
+ break;
+ }
+ $iBufferSize = $iNewBufferSize;
+ $bBufferSizeAdapted = true;
+ } else {
+ $sReadRem = fread($imap_stream,$iSize - $iBufferSize);
+ $bFinished = true;
+ if (!$sReadRem) {
+ $results = false;
+ break;
+ }
+ }
+ $sRead .= $sReadRem;
+ $iRetrieved += $iRemainder;
+ unset($sReadRem);
+ }
+ $filter($sRead);
+ }
+ if ($outputstream) {
+ if (is_resource($outputstream)) {
+ fwrite($outputstream,$sRead);
+ } else if ($outputstream == 'php://stdout') {
+ echo $sRead;
+ }
+ }
+ if ($no_return) {
+ $sRead = '';
+ }
+ $results .= $sRead;
+ }
+ if (!$results && !$bFinished) {
+ $sRead = fread($imap_stream,($iSize - ($iRetrieved)));
+ if ($filter) {
+ $filter($sRead);
+ }
+ if ($outputstream) {
+ if (is_resource($outputstream)) {
+ fwrite($outputstream,$sRead);
+ } else if ($outputstream == 'php://stdout') { // FIXME
+ echo $sRead;
+ }
+ }
+ if ($no_return) {
+ $sRead = '';
+ }
+ $results .= $sRead;
+ }
+ return $results;
+}
+
+
+