GRASS GIS 7 Programmer's Manual
7.9.dev(2021)-e5379bbd7
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GRASS GIS 7 Programmer's Manual
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Pages
xeq.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
eq(a,b) = a == b
8
****************************************************************/
9
10
int
f_eq
(
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
if
(argt[0] !=
CELL_TYPE
)
21
return
E_RES_TYPE
;
22
23
for
(i = 2; i <= argc; i++)
24
if
(argt[i] != argt[1])
25
return
E_ARG_TYPE
;
26
27
switch
(argt[1]) {
28
case
CELL_TYPE
:
29
{
30
CELL
*arg1 = args[1];
31
CELL
*arg2 = args[2];
32
33
for
(i = 0; i <
columns
; i++) {
34
if
(
IS_NULL_C
(&arg1[i]) ||
IS_NULL_C
(&arg2[i]))
35
SET_NULL_C
(&res[i]);
36
else
37
res[i] = arg1[i] == arg2[i];
38
}
39
return
0;
40
}
41
case
FCELL_TYPE
:
42
{
43
FCELL
*arg1 = args[1];
44
FCELL
*arg2 = args[2];
45
46
for
(i = 0; i <
columns
; i++) {
47
if
(
IS_NULL_F
(&arg1[i]) ||
IS_NULL_F
(&arg2[i]))
48
SET_NULL_C
(&res[i]);
49
else
50
res[i] = arg1[i] == arg2[i];
51
}
52
return
0;
53
}
54
case
DCELL_TYPE
:
55
{
56
DCELL
*arg1 = args[1];
57
DCELL
*arg2 = args[2];
58
59
for
(i = 0; i <
columns
; i++) {
60
if
(
IS_NULL_D
(&arg1[i]) ||
IS_NULL_D
(&arg2[i]))
61
SET_NULL_C
(&res[i]);
62
else
63
res[i] = arg1[i] == arg2[i];
64
}
65
return
0;
66
}
67
default
:
68
return
E_INV_TYPE
;
69
}
70
}
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
IS_NULL_F
#define IS_NULL_F(x)
Definition:
calc.h:29
E_ARG_TYPE
Definition:
calc.h:14
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
f_eq
int f_eq(int argc, const int *argt, void **args)
Definition:
xeq.c:10
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
E_RES_TYPE
Definition:
calc.h:15
calc.h
lib
calc
xeq.c
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