GRASS GIS 7 Programmer's Manual  7.5.svn(2018)-r72996
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xbitnot.c
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1 
2 #include <grass/gis.h>
3 #include <grass/raster.h>
4 #include <grass/calc.h>
5 
6 /****************************************************************
7 bitnot(a) = ~a
8 ****************************************************************/
9 
10 int f_bitnot(int argc, const int *argt, void **args)
11 {
12  CELL *res = args[0];
13  CELL *arg1 = args[1];
14  int i;
15 
16  if (argc < 1)
17  return E_ARG_LO;
18  if (argc > 1)
19  return E_ARG_HI;
20 
21  if (argt[1] != CELL_TYPE)
22  return E_ARG_TYPE;
23 
24  if (argt[0] != CELL_TYPE)
25  return E_RES_TYPE;
26 
27  for (i = 0; i < columns; i++) {
28  if (IS_NULL_C(&arg1[i]))
29  SET_NULL_C(&res[i]);
30  else
31  res[i] = ~arg1[i];
32  }
33 
34  return 0;
35 }
#define CELL_TYPE
Definition: raster.h:11
#define SET_NULL_C(x)
Definition: calc.h:32
#define IS_NULL_C(x)
Definition: calc.h:28
Definition: calc.h:13
int columns
Definition: calc.c:12
Definition: calc.h:12
int CELL
Definition: gis.h:580
int f_bitnot(int argc, const int *argt, void **args)
Definition: xbitnot.c:10