/usr/lib/grass64/include/grass/segment.h is in grass-dev 6.4.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | #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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