hashtbl.h

   1 /*
   2  * hashtbl.h
   3  *
   4  * Efficient dictionary hash table class.
   5  */
   6
   7 #ifndef NASM_HASHTBL_H
   8 #define NASM_HASHTBL_H
   9
  10 #include <inttypes.h>
  11 #include <stddef.h>
  12 #include "nasmlib.h"
  13
  14 struct hash_tbl_node {
  15     uint64_t hash;
  16     const char *key;
  17     void *data;
  18 };
  19
  20 struct hash_table {
  21     struct hash_tbl_node *table;
  22     size_t load;
  23     size_t size;
  24     size_t max_load;
  25 };
  26
  27 struct hash_insert {
  28     uint64_t hash;
  29     struct hash_table *head;
  30     struct hash_tbl_node *where;
  31 };
  32
  33 uint64_t crc64(uint64_t crc, const char *string);
  34 uint64_t crc64i(uint64_t crc, const char *string);
  35 #define CRC64_INIT UINT64_C(0xffffffffffffffff)
  36
  37 /* Some reasonable initial sizes... */
  38 #define HASH_SMALL      4
  39 #define HASH_MEDIUM     16
  40 #define HASH_LARGE      256
  41
  42 void hash_init(struct hash_table *head, size_t size);
  43 void **hash_find(struct hash_table *head, const char *string,
  44                 struct hash_insert *insert);
  45 void **hash_findi(struct hash_table *head, const char *string,
  46                 struct hash_insert *insert);
  47 void **hash_add(struct hash_insert *insert, const char *string, void *data);
  48 void *hash_iterate(const struct hash_table *head,
  49                    struct hash_tbl_node **iterator,
  50                    const char **key);
  51 void hash_free(struct hash_table *head);
  52
  53 #endif /* NASM_HASHTBL_H */