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- #ifndef GRASS_SEGMENT_H
- #define GRASS_SEGMENT_H
- #include <grass/config.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h>
- #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 */
- int offset; /* offset of data past header */
- } SEGMENT ;
- #include <grass/gis.h>
- int segment_address (const 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 *,void *, int, int);
- int segment_get_row (const SEGMENT *, void *, int);
- int segment_init ( SEGMENT *, int, int);
- int segment_pagein (SEGMENT *,int);
- int segment_pageout (SEGMENT *,int);
- int segment_put (SEGMENT *,const void *,int,int);
- int segment_put_row (const SEGMENT *,const void *,int);
- int segment_release (SEGMENT *);
- int segment_seek (const SEGMENT *, int, int);
- int segment_setup (SEGMENT *);
- #endif /* GRASS_SEGMENT_H */
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