PDStaticHash.h

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//
// PDStaticHash.h
//
// Copyright (c) 2012 - 2015 Karl-Johan Alm (http://github.com/kallewoof)
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#ifndef INCLUDED_PDStaticHash_h
#define INCLUDED_PDStaticHash_h

#include "PDDefines.h"

#define static_hash_idx(mask, shift, key)    (((long)key ^ ((long)key >> shift)) & mask)

#define PDStaticHashIdx(stha, key)     static_hash_idx(stha->mask, stha->shift, key)

#define PDStaticHashValueForHash(stha, hash) stha->table[hash]

#define PDStaticHashValueForKey(stha, key)   stha->table[PDStaticHashIdx(stha, key)]

#define PDStaticHashValueForHashAs(stha, hash, type) as(type, PDStaticHashValueForHash(stha, hash))

#define PDStaticHashValueForKeyAs(stha, key, type)   as(type, PDStaticHashValueForKey(stha, key))

extern PDStaticHashRef PDStaticHashCreate(PDInteger entries, void **keys, void **values);

extern void PDStaticHashDisownKeysValues(PDStaticHashRef sh, PDBool disownKeys, PDBool disownValues);

// add key/value entry to a static hash; often expensive
//extern void PDStaticHashAdd(void *key, void *value);

#endif