GRASS GIS 7 Programmer's Manual  7.5.svn(2018)-r72097
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c_minx.c
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1 #include <grass/gis.h>
2 #include <grass/raster.h>
3 
4 void c_minx(DCELL * result, DCELL * values, int n, const void *closure)
5 {
6  DCELL min, minx;
7  int i;
8 
9  Rast_set_d_null_value(&min, 1);
10  Rast_set_d_null_value(&minx, 1);
11 
12  for (i = 0; i < n; i++) {
13  if (Rast_is_d_null_value(&values[i]))
14  continue;
15 
16  if (Rast_is_d_null_value(&min) || min > values[i]) {
17  min = values[i];
18  minx = i;
19  }
20  }
21 
22  if (Rast_is_d_null_value(&minx))
23  Rast_set_d_null_value(result, 1);
24  else
25  *result = minx;
26 }
#define min(x, y)
Definition: draw2.c:31
double DCELL
Definition: gis.h:581
void c_minx(DCELL *result, DCELL *values, int n, const void *closure)
Definition: c_minx.c:4
void Rast_set_d_null_value(DCELL *dcellVals, int numVals)
To set a number of DCELL raster values to NULL.
Definition: null_val.c:155
int Rast_is_d_null_value(const DCELL *dcellVal)
To check if a DCELL raster value is set to NULL.
Definition: null_val.c:261