DataBlade API Programmer's Manual Chapter 12: DataBlade API Function Descriptions

Home

Contents

Index

Master Index

New Book

#include "miloback.h"

...
mi_integer mi_large_object_readwithseek(conn, lodesc, buf, nbytes, off, whence)

		MI_CONNECTION *conn;

		MI_LODESC lodesc;

		char *buf;

		mi_integer nbytes;

		mi_integer off;

		mi_integer whence; 


conn
is a pointer to the connection descriptor that a previous call to mi_open() or mi_server_connect() has established.

lodesc
is the descriptor of the object returned by a previous call to mi_large_object_open(). The object must be open for reading.

buf
is a pointer to a buffer of at least nbytes into which the data should be read.

nbytes
is the number of bytes to read.

off
is the offset. It describes where to seek in the object. Its value depends on the value of whence:



If whence is MI_LO_SEEK_SET, the offset is measured relative to the beginning of the object.



If whence is MI_LO_SEEK_CUR, the offset is relative to the current position in the object.



If whence is MI_LO_SEEK_END, the offset is relative to the end of the file.

whence
determines how the offset is interpreted.





 



Valid in Client Application?

Valid in Server Routine?

Yes
Yes