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xfloor.c
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#include <math.h>
#include <grass/gis.h>
#include <grass/raster.h>
#include <grass/calc.h>
/**********************************************************************
floor(x)
the largest integral value that is not greater than x
**********************************************************************/
int f_floor(int argc, const int *argt, void **args)
{
int i;
if (argc < 1)
return E_ARG_LO;
if (argc > 1)
return E_ARG_HI;
if (argt[0] != argt[1])
return E_RES_TYPE;
switch (argt[1]) {
case CELL_TYPE: {
CELL *res = args[0];
CELL *arg1 = args[1];
for (i = 0; i < columns; i++)
if (IS_NULL_C(&arg1[i]))
SET_NULL_C(&res[i]);
else
res[i] = arg1[i];
return 0;
}
case FCELL_TYPE: {
FCELL *res = args[0];
FCELL *arg1 = args[1];
for (i = 0; i < columns; i++)
if (IS_NULL_F(&arg1[i]))
SET_NULL_F(&res[i]);
else
res[i] = (FCELL)floor(arg1[i]);
return 0;
}
case DCELL_TYPE: {
DCELL *res = args[0];
DCELL *arg1 = args[1];
for (i = 0; i < columns; i++)
if (IS_NULL_D(&arg1[i]))
SET_NULL_D(&res[i]);
else
res[i] = floor(arg1[i]);
return 0;
}
default:
return E_INV_TYPE;
}
}
columns
int columns
Definition calc.c:11
f_floor
int f_floor(int argc, const int *argt, void **args)
Definition xfloor.c:13