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56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// ================================================================
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// Array-only (open addressing) string-to-void linked hash map with linear
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// probing for collisions.
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//
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// John Kerl 2012-08-13
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//
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// Notes:
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// * null key is not supported.
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// * null value is supported.
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//
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// See also:
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// * http://en.wikipedia.org/wiki/Hash_table
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// * http://docs.oracle.com/javase/6/docs/api/java/util/Map.html
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// ================================================================
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#ifndef LHMSV_H
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#define LHMSV_H
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#include "containers/sllv.h"
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#include "containers/free_flags.h"
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// ----------------------------------------------------------------
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typedef struct _lhmsve_t {
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int ideal_index;
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char* key;
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void* pvvalue;
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char free_flags;
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struct _lhmsve_t *pprev;
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struct _lhmsve_t *pnext;
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} lhmsve_t;
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typedef unsigned char lhmsve_state_t;
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typedef struct _lhmsv_t {
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int num_occupied;
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int num_freed;
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int array_length;
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lhmsve_t* entries;
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lhmsve_state_t* states;
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lhmsve_t* phead;
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lhmsve_t* ptail;
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} lhmsv_t;
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// ----------------------------------------------------------------
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lhmsv_t* lhmsv_alloc();
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void lhmsv_free(lhmsv_t* pmap);
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void lhmsv_clear(lhmsv_t* pmap);
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void lhmsv_put(lhmsv_t* pmap, char* key, void* pvvalue, char free_flags);
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void* lhmsv_get(lhmsv_t* pmap, char* key);
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int lhmsv_has_key(lhmsv_t* pmap, char* key);
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// Unit-test hook
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int lhmsv_check_counts(lhmsv_t* pmap);
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#endif // LHMSV_H
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