calc.h

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#ifndef GRASS_CALC_H
#define GRASS_CALC_H
 
#include <grass/gis.h>
#include <grass/raster.h>
 
typedef int func_t(int argc, const int *argt, void **args);
typedef int args_t(int argc, int *argt);
 
enum {
    E_ARG_LO = 1,
    E_ARG_HI = 2,
    E_ARG_TYPE = 3,
    E_RES_TYPE = 4,
    E_INV_TYPE = 5,
    E_ARG_NUM = 6,
    E_WTF = 99
};
 
typedef struct func_desc {
    const char *name;
    args_t *check_args;
    func_t *func;
} func_desc;
 
#define IS_NULL_C(x)  (Rast_is_c_null_value((x)))
#define IS_NULL_F(x)  (Rast_is_f_null_value((x)))
#define IS_NULL_D(x)  (Rast_is_d_null_value((x)))
 
#define SET_NULL_C(x) (Rast_set_c_null_value((x), 1))
#define SET_NULL_F(x) (Rast_set_f_null_value((x), 1))
#define SET_NULL_D(x) (Rast_set_d_null_value((x), 1))
 
extern volatile int floating_point_exception;
extern volatile int floating_point_exception_occurred;
 
extern int columns;
 
extern func_desc calc_func_descs[];
 
#include <grass/defs/calc.h>
 
#endif