GRASS GIS 7 Programmer's Manual
7.9.dev(2021)-e5379bbd7
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xne.c
Go to the documentation of this file.
1
2
#include <
grass/gis.h
>
3
#include <
grass/raster.h
>
4
#include <
grass/calc.h
>
5
6
/****************************************************************
7
ne(a,b) = a != b
8
****************************************************************/
9
10
int
f_ne
(
int
argc,
const
int
*argt,
void
**args)
11
{
12
CELL
*res = args[0];
13
int
i;
14
15
if
(argc < 2)
16
return
E_ARG_LO
;
17
if
(argc > 2)
18
return
E_ARG_HI
;
19
20
switch
(argt[1]) {
21
case
CELL_TYPE
:
22
{
23
CELL
*arg1 = args[1];
24
CELL
*arg2 = args[2];
25
26
for
(i = 0; i <
columns
; i++) {
27
if
(
IS_NULL_C
(&arg1[i]) ||
IS_NULL_C
(&arg2[i]))
28
SET_NULL_C
(&res[i]);
29
else
30
res[i] = arg1[i] != arg2[i];
31
}
32
return
0;
33
}
34
case
FCELL_TYPE
:
35
{
36
FCELL
*arg1 = args[1];
37
FCELL
*arg2 = args[2];
38
39
for
(i = 0; i <
columns
; i++) {
40
if
(
IS_NULL_F
(&arg1[i]) ||
IS_NULL_F
(&arg2[i]))
41
SET_NULL_C
(&res[i]);
42
else
43
res[i] = arg1[i] != arg2[i];
44
}
45
return
0;
46
}
47
case
DCELL_TYPE
:
48
{
49
DCELL
*arg1 = args[1];
50
DCELL
*arg2 = args[2];
51
52
for
(i = 0; i <
columns
; i++) {
53
if
(
IS_NULL_D
(&arg1[i]) ||
IS_NULL_D
(&arg2[i]))
54
SET_NULL_C
(&res[i]);
55
else
56
res[i] = arg1[i] != arg2[i];
57
}
58
return
0;
59
}
60
default
:
61
return
E_INV_TYPE
;
62
}
63
}
CELL_TYPE
#define CELL_TYPE
Definition:
raster.h:11
SET_NULL_C
#define SET_NULL_C(x)
Definition:
calc.h:32
DCELL
double DCELL
Definition:
gis.h:603
f_ne
int f_ne(int argc, const int *argt, void **args)
Definition:
xne.c:10
IS_NULL_F
#define IS_NULL_F(x)
Definition:
calc.h:29
IS_NULL_C
#define IS_NULL_C(x)
Definition:
calc.h:28
E_ARG_HI
Definition:
calc.h:13
columns
int columns
Definition:
calc.c:12
raster.h
gis.h
DCELL_TYPE
#define DCELL_TYPE
Definition:
raster.h:13
E_ARG_LO
Definition:
calc.h:12
FCELL
float FCELL
Definition:
gis.h:604
IS_NULL_D
#define IS_NULL_D(x)
Definition:
calc.h:30
CELL
int CELL
Definition:
gis.h:602
E_INV_TYPE
Definition:
calc.h:16
FCELL_TYPE
#define FCELL_TYPE
Definition:
raster.h:12
calc.h
lib
calc
xne.c
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