add new functions:

ocitelllob(); [ OCI_Lob->tell(); ] - ftell(); analogue for Lobs
ociwritelob(); [ OCI_Lob->write(); ] - fwrite(); analogue for Lobs
ocitruncatelob(); [ OCI_Lob->truncate(); ] - ftruncate(); analogue for Lobs
ocieraselob(); [ OCI_Lob->erase(); ] - erases specified part of a Lob (for BLOBs it means zero-filling, for CLOBs - space-filling)
ociflushlob(); [ OCI_Lob->flush(); ] - flushes Lob buffer (if buffering was enabled before)
ocisetbufferinglob(); [ OCI_Lob->setBuffering(); ] - turns on/off buffering for the current Lob
ocigetbufferinglob(); [ OCI_Lob->getBuffering(); ] - gets buffering' current state
ocirewindlob(); [ OCI_Lob->rewind(); ] - rewind(); analogue for Lobs
ocireadlob(); [ OCI_Lob->read(); ] - fread(); analogue for Lobs
ocieoflob(); [ OCI_Lob->eof(); ] - feof(); analogue for Lobs
ociseeklob(); [ OCI_Lob->seek(); ] - fseek(); analogue for Lobs
ocilobgetlength(); [ OCI_Lob->getLength(); ] - filesize(); analogue for Lobs

ociappendlob(); - appends data from a Lob to another Lob
ocicopylob(); - copies data from a Lob to another Lob
ociisequallob(); - compares 2 Lobs and checks if they are equal

TODO cleanup
and other minor fixes

ext/oci8/php_oci8.h

@@ -51,6 +51,10 @@
 
 #include <oci.h>
 
+#define OCI_SEEK_SET 0
+#define OCI_SEEK_CUR 1
+#define OCI_SEEK_END 2
+
 typedef struct {
 	int num;
 	int persistent;
@@ -89,6 +93,9 @@ typedef struct {
 	oci_connection *conn;
 	dvoid *ocidescr;
 	ub4 type;
+	int lob_current_position; 
+	int lob_size;  // -1 = Lob wasn't initialized yet
+	int buffering; // 0 - off, 1 - on, 2 - on and buffer was used
 } oci_descriptor;
 
 typedef struct {