GRASS 8 Programmer's Manual 8.6.0dev(2026)-f6f2c534ea
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xnull.c
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1#include <grass/gis.h>
2#include <grass/raster.h>
3#include <grass/calc.h>
4
5/****************************************************************
6null() null values
7****************************************************************/
8
9int f_null(int argc, const int *argt, void **args)
10{
11 CELL *res = args[0];
12 int i;
13
14 if (argc > 0)
15 return E_ARG_HI;
16
17 if (argt[0] != CELL_TYPE)
18 return E_RES_TYPE;
19
20 for (i = 0; i < columns; i++)
21 SET_NULL_C(&res[i]);
22
23 return 0;
24}
@ E_RES_TYPE
Definition calc.h:14
@ E_ARG_HI
Definition calc.h:12
int columns
Definition calc.c:11
#define SET_NULL_C(x)
Definition calc.h:30
func_t f_null
int CELL
Definition gis.h:634
#define CELL_TYPE
Definition raster.h:11