-/*
- * This is the internal storage format for managed large objects
- *
- */
-
-typedef Oid Blob;
-
-/*
- * Various forward declarations:
- */
-
-Blob *lo_in(char *str); /* Create from String */
-char *lo_out(Blob * addr); /* Output oid as String */
-Oid lo_oid(Blob * addr); /* Return oid as an oid */
-Blob *lo(Oid oid); /* Return Blob based on oid */
-Datum lo_manage(PG_FUNCTION_ARGS); /* Trigger handler */
-
-/*
- * This creates a large object, and sets its OID to the value in the
- * supplied string.
- *
- * If the string is empty, then a new LargeObject is created, and its oid
- * is placed in the resulting lo.
- */
-Blob *
-lo_in(char *str)
-{
- Blob *result;
- Oid oid;
- int count;
-
- if (strlen(str) > 0)
- {
- count = sscanf(str, "%u", &oid);
-
- if (count < 1)
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("error in parsing \"%s\"", str)));
-
- if (oid == InvalidOid)
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("illegal oid: \"%s\"", str)));
- }
- else
- {
- /*
- * There is no Oid passed, so create a new one
- */
- oid = DatumGetObjectId(DirectFunctionCall1(lo_creat,
- Int32GetDatum(INV_READ | INV_WRITE)));
- if (oid == InvalidOid)
- /* internal error */
- elog(ERROR, "InvalidOid returned from lo_creat");
- }
-
- result = (Blob *) palloc(sizeof(Blob));
-
- *result = oid;
-
- return (result);
-}
-
-/*
- * This simply outputs the Oid of the Blob as a string.
- */
-char *
-lo_out(Blob * addr)
-{
- char *result;
-
- if (addr == NULL)
- return (NULL);
-
- result = (char *) palloc(32);
- snprintf(result, 32, "%u", *addr);
- return (result);
-}
-
-/*
- * This function converts Blob to oid.
- *
- * eg: select lo_export(raster::oid,'/path/file') from table;
- *
- */
-Oid
-lo_oid(Blob * addr)
-{
- if (addr == NULL)
- return InvalidOid;
- return (Oid) (*addr);
-}
-
-/*
- * This function is used so we can convert oid's to lo's
- *
- * ie: insert into table values(lo_import('/path/file')::lo);
- *
- */
-Blob *
-lo(Oid oid)
-{
- Blob *result = (Blob *) palloc(sizeof(Blob));