
#include <grass/gis.h>
#include "globals.h"
#include "expression.h"
#include "func_proto.h"

/****************************************************************
or(a,b) = a || b
****************************************************************/

int
f_or(int argc, const int *argt, void **args)
{
	CELL *res = args[0];
	CELL *arg1 = args[1];
	CELL *arg2 = args[2];
	int i;

	if (argc < 2)
		return E_ARG_LO;
	if (argc > 2)
		return E_ARG_HI;

	if (argt[1] != CELL_TYPE || argt[2] != CELL_TYPE)
		return E_ARG_TYPE;

	if (argt[0] != CELL_TYPE)
		return E_RES_TYPE;

	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;
}

