#include <limits.h>

#include "api.h"

#define HEAD 2*sizeof(int)

#define SIZE(p)		   ((int *)(p))[-1]
#define SET_SIZE(p, n) ((int *)(p))[-1] = n
#define CAPACITY(p)    ((int *)(p))[-2]

struct among
{
	int			s_size;			/* number of chars in string */
	symbol	   *s;				/* search string */
	int			substring_i;	/* index to longest matching substring */
	int			result;			/* result of the lookup */
	int			(*function) (struct SN_env *);
};

extern symbol *create_s(void);
extern void lose_s(symbol * p);

extern int	skip_utf8(const symbol * p, int c, int lb, int l, int n);

extern int	in_grouping_U(struct SN_env * z, unsigned char *s, int min, int max);
extern int	in_grouping_b_U(struct SN_env * z, unsigned char *s, int min, int max);
extern int	out_grouping_U(struct SN_env * z, unsigned char *s, int min, int max);
extern int	out_grouping_b_U(struct SN_env * z, unsigned char *s, int min, int max);

extern int	in_grouping(struct SN_env * z, unsigned char *s, int min, int max);
extern int	in_grouping_b(struct SN_env * z, unsigned char *s, int min, int max);
extern int	out_grouping(struct SN_env * z, unsigned char *s, int min, int max);
extern int	out_grouping_b(struct SN_env * z, unsigned char *s, int min, int max);

extern int	eq_s(struct SN_env * z, int s_size, symbol * s);
extern int	eq_s_b(struct SN_env * z, int s_size, symbol * s);
extern int	eq_v(struct SN_env * z, symbol * p);
extern int	eq_v_b(struct SN_env * z, symbol * p);

extern int	find_among(struct SN_env * z, struct among * v, int v_size);
extern int	find_among_b(struct SN_env * z, struct among * v, int v_size);

extern int	replace_s(struct SN_env * z, int c_bra, int c_ket, int s_size, const symbol * s, int *adjustment);
extern int	slice_from_s(struct SN_env * z, int s_size, symbol * s);
extern int	slice_from_v(struct SN_env * z, symbol * p);
extern int	slice_del(struct SN_env * z);

extern int	insert_s(struct SN_env * z, int bra, int ket, int s_size, symbol * s);
extern int	insert_v(struct SN_env * z, int bra, int ket, symbol * p);

extern symbol *slice_to(struct SN_env * z, symbol * p);
extern symbol *assign_to(struct SN_env * z, symbol * p);

extern void debug(struct SN_env * z, int number, int line_count);