segment/get.c File Reference

Get segment routines. More...

#include <string.h>
#include "local_proto.h"

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Functions
int	Segment_get (SEGMENT *SEG, void *buf, off_t row, off_t col)
	Get value from segment file. More...

Detailed Description

Get segment routines.

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author

GRASS GIS Development Team

Date

2005-2018

Definition in file segment/get.c.

Function Documentation

Segment_get()

int Segment_get	(	SEGMENT *	SEG,
		void *	buf,
		off_t	row,
		off_t	col
	)

Get value from segment file.

Provides random read access to the segmented data. It gets len bytes of data into buf from the segment file seg for the corresponding row and col in the original data matrix.

Parameters

[in]	SEG	segment
[in,out]	buf	value return buffer
[in]	row
[in]	col

Returns

1 of successful

-1 if unable to seek or read segment file

Definition at line 39 of file segment/get.c.

References SEGMENT::address, SEGMENT::scb::buf, SEGMENT::cache, SEGMENT::len, SEGMENT::ncols, SEGMENT::scb, and seg_pagein().