/* This is a public domain general purpose hash table package written by Peter Moore @ UCB. */

/* @(#) st.h 5.1 89/12/14 */

#ifndef ST_INCLUDED

#define ST_INCLUDED

#ifdef I_STDINT
# include <stdint.h>
#elif defined(I_INTTYPES)
# include <inttypes.h>
#elif defined(__MINGW32__) || defined(__MINGW64__)
  /* MinGW provides uintptr_t via <crtdefs.h>, included by <stdlib.h> */
#elif defined(_MSC_VER) && _MSC_VER >= 1600
  /* MSVC 2010+ provides <stdint.h> */
# include <stdint.h>
#elif !defined(SYCK_UINTPTR_DEFINED)
# define SYCK_UINTPTR_DEFINED
  typedef unsigned long uintptr_t;
#endif

typedef uintptr_t st_data_t;
typedef struct st_table st_table;

struct st_hash_type {
    int (*compare)(st_data_t, st_data_t);
    int (*hash)(st_data_t);
};

struct st_table {
    struct st_hash_type *type;
    int num_bins;
    int num_entries;
    struct st_table_entry **bins;
};

#define st_is_member(table,key) st_lookup(table,key,(st_data_t *)0)

enum st_retval {ST_CONTINUE, ST_STOP, ST_DELETE};

typedef enum st_retval (*st_foreach_func)(st_data_t, st_data_t, st_data_t);

st_table *st_init_table(struct st_hash_type *);
st_table *st_init_table_with_size(struct st_hash_type *, int);
st_table *st_init_numtable(void);
st_table *st_init_numtable_with_size(int);
st_table *st_init_strtable(void);
st_table *st_init_strtable_with_size(int);
int st_delete(st_table *, st_data_t *, st_data_t *);
int st_delete_safe(st_table *, st_data_t *, st_data_t *, st_data_t);
int st_insert(st_table *, st_data_t, st_data_t);
int st_lookup(st_table *, st_data_t, st_data_t *);
void st_foreach(st_table *, st_foreach_func, st_data_t);
void st_add_direct(st_table *, st_data_t, st_data_t);
void st_free_table(st_table *);
void st_cleanup_safe(st_table *, st_data_t);
st_table *st_copy(st_table *);

#define ST_NUMCMP	((int (*)(st_data_t, st_data_t)) 0)
#define ST_NUMHASH	((int (*)(st_data_t)) -2)

#define st_numcmp	ST_NUMCMP
#define st_numhash	ST_NUMHASH

int st_strhash(st_data_t);

#endif /* ST_INCLUDED */