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#ifndef GRASS_SEGMENT_H
#define GRASS_SEGMENT_H
#include "config.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifndef SEEK_OFFSET
#define SEEK_OFFSET off_t
#endif
typedef struct
{
int open; /* open flag */
int nrows; /* rows in original data */
int ncols; /* cols in original data */
int len; /* bytes per data value */
int srows; /* rows in segments */
int scols; /* cols in segments */
int size; /* size in bytes of a segment */
int spr; /* segments per row */
int spill; /* cols in last segment in row */
int fd ; /* file descriptor to read/write segment */
struct SEGMENT_SCB /* control blocks */
{
char *buf ; /* data buffer */
char dirty ; /* dirty flag */
int age; /* for order of access */
int n; /* segment number */
} *scb ;
int nseg; /* number of segments in memory */
int cur; /* last accessed segment */
SEEK_OFFSET offset; /* offset of data past header */
} SEGMENT ;
#ifndef HAVE_LSEEK
SEEK_OFFSET lseek();
#endif
#ifndef _GRASS_GIS_LIB
#include "gis.h"
#endif
int segment_address ( SEGMENT *, int, int, int *, int *);
int segment_flush ( SEGMENT *);
int segment_format (int, int, int, int, int, int);
int segment_format_nofill (int, int, int, int, int, int);
/* int segment_get( SEGMENT *,int *, int, int); */
int segment_get( SEGMENT *,void *, int, int);
/* int segment_get_row (SEGMENT *, CELL *, int); */
int segment_get_row (SEGMENT *, void *, int);
int segment_init ( SEGMENT *, int, int);
int segment_pagein (SEGMENT *,int);
int segment_pageout ( SEGMENT *,int);
/* int segment_put ( SEGMENT *,int *,int,int); */
int segment_put ( SEGMENT *,void *,int,int);
/* int segment_put_row (SEGMENT *,CELL *,int); */
int segment_put_row (SEGMENT *,void *,int);
int segment_release (SEGMENT *);
int segment_seek ( SEGMENT *, int, int);
int segment_setup (SEGMENT *);
#endif
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