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/*--------
* Module: lobj.c
*
* Description: This module contains routines related to manipulating
* large objects.
*
* Classes: none
*
* API functions: none
*
* Comments: See "notice.txt" for copyright and license information.
*--------
*/
#include "lobj.h"
#include "connection.h"
OID
odbc_lo_creat(ConnectionClass *conn, int mode)
{
LO_ARG argv[1];
Int4 retval, result_len;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = mode;
if (!CC_send_function(conn, LO_CREAT, &retval, &result_len, 1, argv, 1))
return 0; /* invalid oid */
else
return (OID) retval;
}
int
odbc_lo_open(ConnectionClass *conn, int lobjId, int mode)
{
int fd;
int result_len;
LO_ARG argv[2];
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = lobjId;
argv[1].isint = 1;
argv[1].len = 4;
argv[1].u.integer = mode;
if (!CC_send_function(conn, LO_OPEN, &fd, &result_len, 1, argv, 2))
return -1;
if (fd >= 0 && odbc_lo_lseek(conn, fd, 0L, SEEK_SET) < 0)
return -1;
return fd;
}
int
odbc_lo_close(ConnectionClass *conn, int fd)
{
LO_ARG argv[1];
int retval,
result_len;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = fd;
if (!CC_send_function(conn, LO_CLOSE, &retval, &result_len, 1, argv, 1))
return -1;
else
return retval;
}
Int4
odbc_lo_read(ConnectionClass *conn, int fd, char *buf, Int4 len)
{
LO_ARG argv[2];
Int4 result_len;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = fd;
argv[1].isint = 1;
argv[1].len = 4;
argv[1].u.integer = len;
if (!CC_send_function(conn, LO_READ, (int *) buf, &result_len, 0, argv, 2))
return -1;
else
return result_len;
}
Int4
odbc_lo_write(ConnectionClass *conn, int fd, char *buf, Int4 len)
{
LO_ARG argv[2];
Int4 retval,
result_len;
if (len <= 0)
return 0;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = fd;
argv[1].isint = 0;
argv[1].len = len;
argv[1].u.ptr = (char *) buf;
if (!CC_send_function(conn, LO_WRITE, &retval, &result_len, 1, argv, 2))
return -1;
else
return retval;
}
Int4
odbc_lo_lseek(ConnectionClass *conn, int fd, int offset, Int4 whence)
{
LO_ARG argv[3];
Int4 retval,
result_len;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = fd;
argv[1].isint = 1;
argv[1].len = 4;
argv[1].u.integer = offset;
argv[2].isint = 1;
argv[2].len = 4;
argv[2].u.integer = whence;
if (!CC_send_function(conn, LO_LSEEK, &retval, &result_len, 1, argv, 3))
return -1;
else
return retval;
}
Int4
odbc_lo_tell(ConnectionClass *conn, int fd)
{
LO_ARG argv[1];
Int4 retval, result_len;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = fd;
if (!CC_send_function(conn, LO_TELL, &retval, &result_len, 1, argv, 1))
return -1;
else
return retval;
}
Int4
odbc_lo_unlink(ConnectionClass *conn, OID lobjId)
{
LO_ARG argv[1];
Int4 retval, result_len;
argv[0].isint = 1;
argv[0].len = 4;
argv[0].u.integer = lobjId;
if (!CC_send_function(conn, LO_UNLINK, &retval, &result_len, 1, argv, 1))
return -1;
else
return retval;
}
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