/*******************************************************/
/* */
/* File : cybos.h */
/* Description : (simpilified) c interface to YBOS */
/* */
/* Author: Sfiligoi Igor */
/* */
/* Created : 07.09.1998 */
/* Last modified: 07.09.1998 */
/* */
/*******************************************************/
#ifndef CYBOS_H
#define CYBOS_H
#include <stdio.h>
typedef struct
{
int rec_size; /* size of the physical record (excluding itself) */
int header_size; /* size of the PR Header (including itself) */
int ph_rec_nr; /* Physical Record Number */
int displacement; /* Displacement to first logical record */
int data[100000]; /* real data */
} tcybos_record;
typedef struct
{
FILE *ybfile; /* stream of the file */
int record_size; /* size of the first physical record (includeing itself) */
/* all the physical records should be the same size */
tcybos_record *record_buffer; /* initialized to record_size size */
int curr_record; /* Current physical record in the buffer */
int curr_pointer; /* Current position inside the buffer */
int curr_lrec; /* Currently pointing to the curr_lrec logical record */
} tcybos;
typedef tcybos *pcybos;
/******************************************/
/* */
/* cybos_open() */
/* */
/* Open a ybos file */
/* */
/* Param: filename - name of the file */
/* */
/* Returns: initialized ybos id */
/* NULL, in case of error */
/* */
/******************************************/
pcybos cybos_open(char *filename);
/******************************************/
/* */
/* cybos_close() */
/* */
/* Close the ybos file */
/* */
/* Param: ybos_id - initialized ybos id */
/* */
/******************************************/
void cybos_close(pcybos ybos_id);
/************************************************************************/
/* */
/* cybos_seek() */
/* */
/* Move pointer in the ybos file */
/* */
/* Param: ybos_id - initialized ybos id */
/* nr_lrecs - relative move in the file */
/* expressed in logical records */
/* If the pointer would move past the last lrec, */
/* set it to the last lrec +1 */
/* If the pointer would move before the first lrec, */
/* set it to the first lrec */
/* */
/* Returns: Current position in the file (first 0) */
/* */
/************************************************************************/
int cybos_seek(pcybos ybos_id,
int nr_lrecs);
/************************************************************************/
/* */
/* cybos_seek_abs() */
/* */
/* Move pointer in the ybos file */
/* */
/* Param: ybos_id - initialized ybos id */
/* lrec_nr - set the pointer to the lrec lrec_nr */
/* If the pointer would move past the last lrec, */
/* set it to the last lrec +1 */
/* If the pointer would move before the first lrec, */
/* set it to the first lrec */
/* */
/* Returns: Current position in the file (first 0) */
/* Most time the same as bank_nr */
/* */
/************************************************************************/
int cybos_seek_abs(pcybos ybos_id,
int lrec_nr);
/**************************************************/
/* */
/* cybos_read() */
/* */
/* Read a bank from the ybos file */
/* Move also to the next bank */
/* */
/* Param: ybos_id - initialized ybos id */
/* lrec - pointer to the lrec buffer */
/* maxsize - buffer size (nr of ints) */
/* */
/* Returns: Nr of ints read */
/* lrecsize, if the buffer was to small */
/* where lrecsize>maxdata */
/* 0, if ybos pointer past the last bank */
/* <0, in case of error */
/* */
/**************************************************/
int cybos_read(pcybos ybos_id,
int *lrec,
int maxsize);
#endif /* CYBOS_H */