GRASS GIS 8 Programmer's Manual
8.5.0dev(2024)-03675b0323
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Segment seek routines. More...
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <grass/gis.h>
#include "local_proto.h"
Go to the source code of this file.
Macros | |
#define | SEG_SEEK_FAST(SEG, n, index) ((((off_t)(n)) << (SEG)->sizebits) + (index) + (SEG)->offset) |
Internal use only. More... | |
#define | SEG_SEEK_SLOW(SEG, n, index) ((off_t)(n) * (SEG)->size + (index) + (SEG)->offset) |
Functions | |
int | seg_seek_fast (const SEGMENT *SEG, int n, int index) |
int | seg_seek_slow (const SEGMENT *SEG, int n, int index) |
int | seg_seek (const SEGMENT *SEG, int n, int index) |
Segment seek routines.
This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.
Definition in file segment/seek.c.
#define SEG_SEEK_FAST | ( | SEG, | |
n, | |||
index | |||
) | ((((off_t)(n)) << (SEG)->sizebits) + (index) + (SEG)->offset) |
Internal use only.
Seek into a segment.
[in,out] | SEG | segment |
[in] | n | |
[in] | index |
Definition at line 34 of file segment/seek.c.
#define SEG_SEEK_SLOW | ( | SEG, | |
n, | |||
index | |||
) | ((off_t)(n) * (SEG)->size + (index) + (SEG)->offset) |
Definition at line 37 of file segment/seek.c.
int seg_seek | ( | const SEGMENT * | SEG, |
int | n, | ||
int | index | ||
) |
Definition at line 58 of file segment/seek.c.
References SEGMENT::seek.
int seg_seek_fast | ( | const SEGMENT * | SEG, |
int | n, | ||
int | index | ||
) |
Definition at line 40 of file segment/seek.c.
References G_fatal_error(), and SEG_SEEK_FAST.
Referenced by seg_setup().
int seg_seek_slow | ( | const SEGMENT * | SEG, |
int | n, | ||
int | index | ||
) |
Definition at line 49 of file segment/seek.c.
References G_fatal_error(), and SEG_SEEK_SLOW.
Referenced by seg_setup().