GRASS GIS 8 Programmer's Manual
8.4.1(2025)-45ca3179ab
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xnull.c
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#include <grass/gis.h>
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#include <grass/raster.h>
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#include <grass/calc.h>
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/****************************************************************
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null() null values
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****************************************************************/
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int
f_null
(
int
argc,
const
int
*argt,
void
**args)
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{
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CELL *res = args[0];
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int
i;
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if
(argc > 0)
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return
E_ARG_HI;
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if
(argt[0] != CELL_TYPE)
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return
E_RES_TYPE;
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for
(i = 0; i <
columns
; i++)
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SET_NULL_C(&res[i]);
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return
0;
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}
columns
int columns
Definition
calc.c:11
f_null
int f_null(int argc, const int *argt, void **args)
Definition
xnull.c:9
calc
xnull.c
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