/*	$OpenBSD: c_test.h,v 1.4 2004/12/20 11:34:26 otto Exp $	*/

/* Various types of operations.  Keeping things grouped nicely
 * (unary,binary) makes switch() statements more efficient.
 */
enum Test_op {
	TO_NONOP = 0,	/* non-operator */
	/* unary operators */
	TO_STNZE, TO_STZER, TO_OPTION,
	TO_FILAXST,
	TO_FILEXST,
	TO_FILREG, TO_FILBDEV, TO_FILCDEV, TO_FILSYM, TO_FILFIFO, TO_FILSOCK,
	TO_FILCDF, TO_FILID, TO_FILGID, TO_FILSETG, TO_FILSTCK, TO_FILUID,
	TO_FILRD, TO_FILGZ, TO_FILTT, TO_FILSETU, TO_FILWR, TO_FILEX,
	/* binary operators */
	TO_STEQL, TO_STNEQ, TO_STLT, TO_STGT, TO_INTEQ, TO_INTNE, TO_INTGT,
	TO_INTGE, TO_INTLT, TO_INTLE, TO_FILEQ, TO_FILNT, TO_FILOT
};
typedef enum Test_op Test_op;

/* Used by Test_env.isa() (order important - used to index *_tokens[] arrays) */
enum Test_meta {
	TM_OR,		/* -o or || */
	TM_AND,		/* -a or && */
	TM_NOT,		/* ! */
	TM_OPAREN,	/* ( */
	TM_CPAREN,	/* ) */
	TM_UNOP,	/* unary operator */
	TM_BINOP,	/* binary operator */
	TM_END		/* end of input */
};
typedef enum Test_meta Test_meta;

#define TEF_ERROR	BIT(0)		/* set if we've hit an error */
#define TEF_DBRACKET	BIT(1)		/* set if [[ .. ]] test */

typedef struct test_env Test_env;
struct test_env {
	int	flags;		/* TEF_* */
	union {
		char	**wp;		/* used by ptest_* */
		XPtrV	*av;		/* used by dbtestp_* */
	} pos;
	char **wp_end;			/* used by ptest_* */
	int	(*isa)(Test_env *, Test_meta);
	const char *(*getopnd) (Test_env *, Test_op, int);
	int	(*eval)(Test_env *, Test_op, const char *, const char *, int);
	void	(*error)(Test_env *, int, const char *);
};

Test_op	test_isop(Test_env *, Test_meta, const char *);
int     test_eval(Test_env *, Test_op, const char *, const char *, int);
int	test_parse(Test_env *);