GRASS 8 Programmer's Manual 8.6.0dev(2026)-5a31d549cc
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c_max.c
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1#include <grass/gis.h>
2#include <grass/raster.h>
3
4void c_max(DCELL *result, DCELL *values, int n, const void *closure G_UNUSED)
5{
7 int i;
8
10
11 for (i = 0; i < n; i++) {
12 if (Rast_is_d_null_value(&values[i]))
13 continue;
14
15 if (Rast_is_d_null_value(&max) || max < values[i])
16 max = values[i];
17 }
18
20 Rast_set_d_null_value(result, 1);
21 else
22 *result = max;
23}
24
25void w_max(DCELL *result, DCELL (*values)[2], int n,
26 const void *closure G_UNUSED)
27{
28 DCELL max;
29 int i;
30
32
33 for (i = 0; i < n; i++) {
34 if (Rast_is_d_null_value(&values[i][0]))
35 continue;
36
37 if (Rast_is_d_null_value(&max) || max < values[i][0])
38 max = values[i][0];
39 }
40
42 Rast_set_d_null_value(result, 1);
43 else
44 *result = max;
45}
void Rast_set_d_null_value(DCELL *, int)
To set a number of DCELL raster values to NULL.
Definition null_val.c:153
#define Rast_is_d_null_value(dcellVal)
stat_func c_max
stat_func_w w_max
#define max(x, y)
Definition draw2.c:30
#define G_UNUSED
A macro for an attribute, if attached to a variable, indicating that the variable is not used.
Definition gis.h:46
double DCELL
Definition gis.h:635