158 lines
4.5 KiB
C
158 lines
4.5 KiB
C
/* This is a public domain general purpose hash table package written by Peter Moore @ UCB. */
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/* @(#) st.h 5.1 89/12/14 */
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#ifndef RUBY_ST_H
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#define RUBY_ST_H 1
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#if defined(__cplusplus)
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extern "C" {
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#if 0
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} /* satisfy cc-mode */
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#endif
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#endif
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#include "ruby/defines.h"
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#if defined STDC_HEADERS
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#include <stddef.h>
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#elif defined HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STDINT_H
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# include <stdint.h>
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#endif
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#ifdef HAVE_INTTYPES_H
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# include <inttypes.h>
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#endif
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#if defined __GNUC__ && __GNUC__ >= 4
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#pragma GCC visibility push(default)
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#endif
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#if SIZEOF_LONG == SIZEOF_VOIDP
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typedef unsigned long st_data_t;
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#elif SIZEOF_LONG_LONG == SIZEOF_VOIDP
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typedef unsigned LONG_LONG st_data_t;
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#else
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# error ---->> st.c requires sizeof(void*) == sizeof(long) or sizeof(LONG_LONG) to be compiled. <<----
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#endif
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#define ST_DATA_T_DEFINED
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#ifndef CHAR_BIT
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# ifdef HAVE_LIMITS_H
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# include <limits.h>
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# else
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# define CHAR_BIT 8
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# endif
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#endif
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#ifndef _
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# define _(args) args
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#endif
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#ifndef ANYARGS
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# ifdef __cplusplus
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# define ANYARGS ...
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# else
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# define ANYARGS
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# endif
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#endif
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typedef struct st_table st_table;
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typedef st_data_t st_index_t;
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typedef int st_compare_func(st_data_t, st_data_t);
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typedef st_index_t st_hash_func(st_data_t);
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typedef char st_check_for_sizeof_st_index_t[SIZEOF_VOIDP == (int)sizeof(st_index_t) ? 1 : -1];
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#define SIZEOF_ST_INDEX_T SIZEOF_VOIDP
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struct st_hash_type {
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int (*compare)(ANYARGS /*st_data_t, st_data_t*/); /* st_compare_func* */
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st_index_t (*hash)(ANYARGS /*st_data_t*/); /* st_hash_func* */
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};
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#define ST_INDEX_BITS (sizeof(st_index_t) * CHAR_BIT)
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struct st_table {
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const struct st_hash_type *type;
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st_index_t num_bins;
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unsigned int entries_packed : 1;
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#ifdef __GNUC__
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/*
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* C spec says,
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* A bit-field shall have a type that is a qualified or unqualified
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* version of _Bool, signed int, unsigned int, or some other
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* implementation-defined type. It is implementation-defined whether
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* atomic types are permitted.
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* In short, long and long long bit-field are implementation-defined
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* feature. Therefore we want to supress a warning explicitly.
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*/
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__extension__
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#endif
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st_index_t num_entries : ST_INDEX_BITS - 1;
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union {
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struct {
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struct st_table_entry **bins;
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struct st_table_entry *head, *tail;
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} big;
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struct {
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struct st_packed_entry *entries;
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st_index_t real_entries;
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} packed;
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} as;
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};
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#define st_is_member(table,key) st_lookup((table),(key),(st_data_t *)0)
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enum st_retval {ST_CONTINUE, ST_STOP, ST_DELETE, ST_CHECK};
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st_table *st_init_table(const struct st_hash_type *);
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st_table *st_init_table_with_size(const struct st_hash_type *, st_index_t);
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st_table *st_init_numtable(void);
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st_table *st_init_numtable_with_size(st_index_t);
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st_table *st_init_strtable(void);
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st_table *st_init_strtable_with_size(st_index_t);
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st_table *st_init_strcasetable(void);
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st_table *st_init_strcasetable_with_size(st_index_t);
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int st_delete(st_table *, st_data_t *, st_data_t *); /* returns 0:notfound 1:deleted */
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int st_delete_safe(st_table *, st_data_t *, st_data_t *, st_data_t);
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int st_insert(st_table *, st_data_t, st_data_t);
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int st_insert2(st_table *, st_data_t, st_data_t, st_data_t (*)(st_data_t));
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int st_lookup(st_table *, st_data_t, st_data_t *);
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int st_get_key(st_table *, st_data_t, st_data_t *);
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typedef int st_update_callback_func(st_data_t *key, st_data_t *value, st_data_t arg, int existing);
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int st_update(st_table *table, st_data_t key, st_update_callback_func *func, st_data_t arg);
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int st_foreach(st_table *, int (*)(ANYARGS), st_data_t);
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int st_foreach_check(st_table *, int (*)(ANYARGS), st_data_t, st_data_t);
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int st_reverse_foreach(st_table *, int (*)(ANYARGS), st_data_t);
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void st_add_direct(st_table *, st_data_t, st_data_t);
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void st_free_table(st_table *);
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void st_cleanup_safe(st_table *, st_data_t);
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void st_clear(st_table *);
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st_table *st_copy(st_table *);
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int st_numcmp(st_data_t, st_data_t);
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st_index_t st_numhash(st_data_t);
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int st_strcasecmp(const char *s1, const char *s2);
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int st_strncasecmp(const char *s1, const char *s2, size_t n);
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size_t st_memsize(const st_table *);
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st_index_t st_hash(const void *ptr, size_t len, st_index_t h);
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st_index_t st_hash_uint32(st_index_t h, uint32_t i);
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st_index_t st_hash_uint(st_index_t h, st_index_t i);
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st_index_t st_hash_end(st_index_t h);
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st_index_t st_hash_start(st_index_t h);
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#define st_hash_start(h) ((st_index_t)(h))
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#if defined __GNUC__ && __GNUC__ >= 4
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#pragma GCC visibility pop
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#endif
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#if defined(__cplusplus)
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#if 0
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{ /* satisfy cc-mode */
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#endif
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} /* extern "C" { */
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#endif
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#endif /* RUBY_ST_H */
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