166c247f36
struct hash_table, a fixed-sized structure, is now allocated by the caller. This lets us integrate it into the Context structure, thus avoiding an additional dynamically allocated object for no good reason. Add some minor code collapsing: make it more obvious that all that differs is a pointer value, rather than relying on the compiler to do tail merging.
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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* hashtbl.h
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*
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* Efficient dictionary hash table class.
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*/
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#ifndef NASM_HASHTBL_H
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#define NASM_HASHTBL_H
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#include <inttypes.h>
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#include <stddef.h>
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#include "nasmlib.h"
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struct hash_tbl_node {
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uint64_t hash;
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const char *key;
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void *data;
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};
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struct hash_table {
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struct hash_tbl_node *table;
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size_t load;
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size_t size;
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size_t max_load;
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};
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struct hash_insert {
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uint64_t hash;
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struct hash_table *head;
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struct hash_tbl_node *where;
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};
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uint64_t crc64(uint64_t crc, const char *string);
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uint64_t crc64i(uint64_t crc, const char *string);
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#define CRC64_INIT UINT64_C(0xffffffffffffffff)
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/* Some reasonable initial sizes... */
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#define HASH_SMALL 4
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#define HASH_MEDIUM 16
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#define HASH_LARGE 256
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void hash_init(struct hash_table *head, size_t size);
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void **hash_find(struct hash_table *head, const char *string,
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struct hash_insert *insert);
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void **hash_findi(struct hash_table *head, const char *string,
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struct hash_insert *insert);
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void **hash_add(struct hash_insert *insert, const char *string, void *data);
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void *hash_iterate(const struct hash_table *head,
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struct hash_tbl_node **iterator,
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const char **key);
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void hash_free(struct hash_table *head);
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#endif /* NASM_HASHTBL_H */
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