#ifndef UTILS_H
#define UTILS_H 1

#include "tac_plus.h"

#include <sys/types.h>		/* for u_* */


/* Configurable:
 */
#define TAC_LIST_PARANOIA 1


/* Bidirectional lists */

#ifdef TAC_LIST_PARANOIA
#define TAC_LIST_MAGIC      (0xBEF78147U)
#define TAC_LIST_NODE_MAGIC (0x297DA735U)
#endif

struct tac_list {
#ifdef TAC_LIST_PARANOIA
    unsigned _magic;
#endif
    struct tac_list_node *_head, *_tail;
};

struct tac_list_node {
#ifdef TAC_LIST_PARANOIA
    unsigned _magic;
#endif
    struct tac_list_node *_next, *_prev;
    struct tac_list *_list;
};


extern void *tac_malloc TAC_ARGS((int size));
extern void *tac_realloc TAC_ARGS((void *ptr, int size));
extern void tac_exit TAC_ARGS((int status)) G_GNUC_NORETURN;
extern char *tac_strdup TAC_ARGS((const char *p));
extern char *tac_make_string TAC_ARGS((u_char *p, int len));
extern const char *tac_find_substring TAC_ARGS((const char *substring, const char *string));
extern int tac_lockfd TAC_ARGS((char *filename, int lockfd));

/* Bidirectional lists: */

extern void tac_list_init TAC_ARGS((struct tac_list *list));
extern void tac_list_node_init TAC_ARGS((struct tac_list_node *node));
extern struct tac_list *tac_list_node_get_list TAC_ARGS((struct tac_list_node *node));
struct tac_list_node *tac_list_first_node TAC_ARGS((struct tac_list *list));
struct tac_list_node *tac_list_last_node TAC_ARGS((struct tac_list *list));
extern void tac_list_addhead TAC_ARGS((struct tac_list *list, struct tac_list_node *node));
extern void tac_list_addtail TAC_ARGS((struct tac_list *list, struct tac_list_node *node));
extern struct tac_list_node *tac_list_node_next TAC_ARGS((struct tac_list_node *node));
extern struct tac_list_node *tac_list_node_prev TAC_ARGS((struct tac_list_node *node));
extern void tac_list_node_remove TAC_ARGS((struct tac_list_node *node));


#endif /* UTILS_H */