GRASS GIS 8 Programmer's Manual 8.2.0(2022)-exported
xor.c
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1
2#include <grass/gis.h>
3#include <grass/raster.h>
4#include <grass/calc.h>
5
6/****************************************************************
7or(a,b,c,...) = a || b || c || ...
8****************************************************************/
9
10int f_or(int argc, const int *argt, void **args)
11{
12 CELL *res = args[0];
13 int i, j;
14
15 if (argc < 1)
16 return E_ARG_LO;
17
18 if (argt[0] != CELL_TYPE)
19 return E_RES_TYPE;
20
21 for (i = 1; i <= argc; i++)
22 if (argt[i] != argt[0])
23 return E_ARG_TYPE;
24
25 for (i = 0; i < columns; i++) {
26 res[i] = 0;
27 for (j = 1; j <= argc; j++) {
28 CELL *arg = args[j];
29 if (IS_NULL_C(&arg[i])) {
30 SET_NULL_C(&res[i]);
31 break;
32 }
33 if (arg[i])
34 res[i] = 1;
35 }
36 }
37
38 return 0;
39}
int columns
Definition: calc.c:12
int f_or(int argc, const int *argt, void **args)
Definition: xor.c:10