dbread.c

Go to the documentation of this file.

/****************************************************************************\
*  dbread                                                                    *
******************************************************************************
*  Dbread is called to signal the database manager program, dbmngr, to read  *
*  a database file and return the data.  This function returns the number    *
*  of bytes read. Programs that use this function should verify that the     *
*  number of bytes read by this function (rmsg.mxfer_len) equals the number  *
*  of bytes requested (rec_size * num_recs).                                 *
*                                                                            *
*  The arguments passed are:                                                 *
*       file_num = database file number (defined in database.h)              *
*       offset   = displacement in bytes from the start of the file of the   *
*                  first byte to be read                                     *
*       rec_size = size of a record in bytes                                 *
*       num_recs = the number of records to read                             *
*       buf      = pointer to a data area to receive the data                *
*                                                                            *
*                                 Wayne Martin - CNRFC  11/23/94             *
\****************************************************************************/
 
 
unsigned long int dbread(unsigned long int file_num, signed long int offset,
    unsigned long int rec_size, unsigned long int num_recs, void *buf) {
 
}