util.h

#ifndef _UTIL_H_
#define _UTIL_H_

#include <stdlib.h>
#include <sys/time.h>
#include <time.h>

#define ARRAY_SZ(arr) (sizeof(arr) / sizeof(arr[0]))

typedef enum {
	DIR_NO = 0,
	DIR_NE = 1,
	DIR_EA = 2,
	DIR_SE = 3,
	DIR_SO = 4,
	DIR_SW = 5,
	DIR_WE = 6,
	DIR_NW = 7,
} wind_dir_t;

typedef struct code2code_t {
	int code;
	int val;
	int disabled;
} code2code_t;

typedef struct code2str_t {
	int code;
	char *str;
	int disabled;
} code2str_t;

typedef struct coordinate_euclid_t {
	int n;
	int m;
} coordinate_euclid_t;

int code2code(code2code_t *list, int code);
char *code2str(code2str_t *list, int code);

void coordinate_moore_neighbour(int hight, int length, coordinate_euclid_t *co,
	wind_dir_t dir, coordinate_euclid_t *neighbour);

/* wind direction at offset from dir. positive values of offset for clockwise
 * and negative values of offset for anticlockwise. offset will always be
 * treated modulo 8. */
wind_dir_t wind_dir_offset(wind_dir_t dir, int offset);
#endif