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xgt.c
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#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/calc.h>
/****************************************************************
gt(a,b) = a > b
****************************************************************/
int f_gt(int argc, const int *argt, void **args)
{
CELL *res = args[0];
int i;
if (argc < 2)
return E_ARG_LO;
if (argc > 2)
return E_ARG_HI;
switch (argt[1]) {
case CELL_TYPE: {
CELL *arg1 = args[1];
CELL *arg2 = args[2];
for (i = 0; i < columns; i++) {
if (IS_NULL_C(&arg1[i]) || IS_NULL_C(&arg2[i]))
SET_NULL_C(&res[i]);
else
res[i] = arg1[i] > arg2[i];
}
return 0;
}
case FCELL_TYPE: {
FCELL *arg1 = args[1];
FCELL *arg2 = args[2];
for (i = 0; i < columns; i++) {
if (IS_NULL_F(&arg1[i]) || IS_NULL_F(&arg2[i]))
SET_NULL_C(&res[i]);
else
res[i] = arg1[i] > arg2[i];
}
return 0;
}
case DCELL_TYPE: {
DCELL *arg1 = args[1];
DCELL *arg2 = args[2];
for (i = 0; i < columns; i++) {
if (IS_NULL_D(&arg1[i]) || IS_NULL_D(&arg2[i]))
SET_NULL_C(&res[i]);
else
res[i] = arg1[i] > arg2[i];
}
return 0;
}
default:
return E_INV_TYPE;
}
}
columns
int columns
Definition calc.c:11
f_gt
int f_gt(int argc, const int *argt, void **args)
Definition xgt.c:9