198 lines
3.0 KiB
C
198 lines
3.0 KiB
C
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/* Module: lobj.c
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*
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* Description: This module contains routines related to manipulating
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* large objects.
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*
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* Classes: none
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*
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* API functions: none
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*
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* Comments: See "notice.txt" for copyright and license information.
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*
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*/
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#include "lobj.h"
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#include "psqlodbc.h"
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#include "connection.h"
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Oid
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lo_creat(ConnectionClass *conn, int mode)
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{
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LO_ARG argv[1];
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int retval, result_len;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = mode;
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if ( ! CC_send_function(conn, LO_CREAT, &retval, &result_len, 1, argv, 1))
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return 0; /* invalid oid */
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else
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return retval;
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}
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int
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lo_open(ConnectionClass *conn, int lobjId, int mode)
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{
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int fd;
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int result_len;
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LO_ARG argv[2];
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = lobjId;
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argv[1].isint = 1;
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argv[1].len = 4;
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argv[1].u.integer = mode;
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if ( ! CC_send_function(conn, LO_OPEN, &fd, &result_len, 1, argv, 2))
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return -1;
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if (fd >= 0 && lo_lseek(conn, fd, 0L, SEEK_SET) < 0)
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return -1;
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return fd;
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}
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int
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lo_close(ConnectionClass *conn, int fd)
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{
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LO_ARG argv[1];
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int retval, result_len;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = fd;
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if ( ! CC_send_function(conn, LO_CLOSE, &retval, &result_len, 1, argv, 1))
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return -1;
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else
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return retval;
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}
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int
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lo_read(ConnectionClass *conn, int fd, char *buf, int len)
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{
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LO_ARG argv[2];
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int result_len;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = fd;
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argv[1].isint = 1;
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argv[1].len = 4;
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argv[1].u.integer = len;
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if ( ! CC_send_function(conn, LO_READ, (int *) buf, &result_len, 0, argv, 2))
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return -1;
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else
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return result_len;
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}
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int
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lo_write(ConnectionClass *conn, int fd, char *buf, int len)
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{
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LO_ARG argv[2];
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int retval, result_len;
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if (len <= 0)
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return 0;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = fd;
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argv[1].isint = 0;
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argv[1].len = len;
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argv[1].u.ptr = (char *) buf;
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if ( ! CC_send_function(conn, LO_WRITE, &retval, &result_len, 1, argv, 2))
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return -1;
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else
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return retval;
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}
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int
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lo_lseek(ConnectionClass *conn, int fd, int offset, int whence)
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{
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LO_ARG argv[3];
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int retval, result_len;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = fd;
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argv[1].isint = 1;
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argv[1].len = 4;
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argv[1].u.integer = offset;
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argv[2].isint = 1;
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argv[2].len = 4;
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argv[2].u.integer = whence;
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if ( ! CC_send_function(conn, LO_LSEEK, &retval, &result_len, 1, argv, 3))
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return -1;
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else
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return retval;
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}
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int
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lo_tell(ConnectionClass *conn, int fd)
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{
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LO_ARG argv[1];
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int retval, result_len;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = fd;
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if ( ! CC_send_function(conn, LO_TELL, &retval, &result_len, 1, argv, 1))
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return -1;
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else
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return retval;
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}
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int
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lo_unlink(ConnectionClass *conn, Oid lobjId)
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{
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LO_ARG argv[1];
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int retval, result_len;
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argv[0].isint = 1;
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argv[0].len = 4;
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argv[0].u.integer = lobjId;
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if ( ! CC_send_function(conn, LO_UNLINK, &retval, &result_len, 1, argv, 1))
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return -1;
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else
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return retval;
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}
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