#ifndef OPTIONS_H
#define OPTIONS_H

/* What an option can return */
typedef int opttype;
#define OPT_INT		1	/* Integer */
#define OPT_FLOAT	2	/* Floating point value */
#define OPT_STRING	3	/* String */
#define OPT_BOOL	4	/* Boolean (integer, value 0 or 1) */
#define OPT_ARRAY	0x100	/* Flag: return an array */

/* Option string, type, and pointer to return variable. */

typedef struct option {
    char *name;			/* Option name without the '-' */
    opttype type;		/* Option return type, see above */
    void *retptr;		/* Address of return variable */
    int *otherptr;		/* Returns other data based on opt. type */
} option;

/* Use of otherptr:
 *	OPT_INT, OPT_FLOAT, OPT_STRING, OPT_BOOL: 1 if option was present
 *	OPT_ARRAY: number of elements read
 * If otherptr == NULL, it is ignored.  If an option is not present, its
 * otherptr's value is not modified.
 */

/* List of options should be terminated with name == NULL. */
int do_options(int, char **, option *);

#endif